10 strace-käsku Linuxi protsesside tõrkeotsinguks ja silumiseks
strace on võimas käsurea tööriist programmide silumiseks ja tõrkeotsinguteks Unixi-laadsetes operatsioonisüsteemides nagu Linux. See hõivab ja salvestab kõik protsessiga tehtud süsteemikõned ja protsessis vastuvõetud signaalid.
See kuvab iga süsteemikõne nime koos sulgudesse lisatud argumentidega ja selle naaseväärtuse standardveale; saate selle soovi korral ka faili ümber suunata.
Selles artiklis selgitame 10 strace-käsu näidet programmide ja protsesside tõrkeotsinguks ja silumiseks Linuxi süsteemis.
Kuidas installida stressiprotsessi jälgimise tööriista Linuxi
Kui strace pole teie Linuxi süsteemi eelinstallitud, käivitage selle installimiseks allpool sobiv käsk.
$ sudo apt install strace #Debian/Ubuntu # yum install strace #RHEL/CentOS # dnf install strace #Fedora 22+
Juhul, kui mõni programm jookseb kokku või käitub ootuspärasel viisil, võite selle süsteemikõnesid läbi käia, et saada aimu, mis selle käivitamisel täpselt juhtus. Nagu hiljem näeme, saab süsteemikõnesid kategoriseerida erinevate sündmuste alla: need, mis on seotud protsessihaldusega, need, mis võtavad argumendina faili, need, mis hõlmavad võrguühendust, mälu kaardistamist, signaale, IPC-d ja ka failikirjeldajatega seotud süsteemikõnesid.
Võite käivitada programmi/käsu strace'iga või edastada talle PID-i, kasutades valikut -p
nagu järgmistes näidetes.
1. Jälgige Linuxi käsusüsteemi kõnesid
Saate lihtsalt käsu käivitada sellise stringiga, siin jälgime kõiki käsku df tehtud süsteemikõnesid.
$ strace df -h execve("/bin/df", ["df", "-h"], [/* 50 vars */]) = 0 brk(NULL) = 0x136e000 access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or directory) mmap(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f82f78fd000 access("/etc/ld.so.preload", R_OK) = -1 ENOENT (No such file or directory) open("/etc/ld.so.cache", O_RDONLY|O_CLOEXEC) = 3 fstat(3, {st_mode=S_IFREG|0644, st_size=147662, ...}) = 0 mmap(NULL, 147662, PROT_READ, MAP_PRIVATE, 3, 0) = 0x7f82f78d8000 close(3) = 0 access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or directory) open("/lib/x86_64-linux-gnu/libc.so.6", O_RDONLY|O_CLOEXEC) = 3 read(3, "7ELF$ strace df -h execve("/bin/df", ["df", "-h"], [/* 50 vars */]) = 0 brk(NULL) = 0x136e000 access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or directory) mmap(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f82f78fd000 access("/etc/ld.so.preload", R_OK) = -1 ENOENT (No such file or directory) open("/etc/ld.so.cache", O_RDONLY|O_CLOEXEC) = 3 fstat(3, {st_mode=S_IFREG|0644, st_size=147662, ...}) = 0 mmap(NULL, 147662, PROT_READ, MAP_PRIVATE, 3, 0) = 0x7f82f78d8000 close(3) = 0 access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or directory) open("/lib/x86_64-linux-gnu/libc.so.6", O_RDONLY|O_CLOEXEC) = 3 read(3, "\177ELF\2\1\1\3\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0P\t\2\0\0\0\0\0"..., 832) = 832 fstat(3, {st_mode=S_IFREG|0755, st_size=1868984, ...}) = 0 mmap(NULL, 3971488, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7f82f7310000 ...$ strace df -h execve("/bin/df", ["df", "-h"], [/* 50 vars */]) = 0 brk(NULL) = 0x136e000 access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or directory) mmap(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f82f78fd000 access("/etc/ld.so.preload", R_OK) = -1 ENOENT (No such file or directory) open("/etc/ld.so.cache", O_RDONLY|O_CLOEXEC) = 3 fstat(3, {st_mode=S_IFREG|0644, st_size=147662, ...}) = 0 mmap(NULL, 147662, PROT_READ, MAP_PRIVATE, 3, 0) = 0x7f82f78d8000 close(3) = 0 access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or directory) open("/lib/x86_64-linux-gnu/libc.so.6", O_RDONLY|O_CLOEXEC) = 3 read(3, "\177ELF\2\1\1\3\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0P\t\2\0\0\0\0\0"..., 832) = 832 fstat(3, {st_mode=S_IFREG|0755, st_size=1868984, ...}) = 0 mmap(NULL, 3971488, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7f82f7310000 ...$ strace df -h execve("/bin/df", ["df", "-h"], [/* 50 vars */]) = 0 brk(NULL) = 0x136e000 access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or directory) mmap(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f82f78fd000 access("/etc/ld.so.preload", R_OK) = -1 ENOENT (No such file or directory) open("/etc/ld.so.cache", O_RDONLY|O_CLOEXEC) = 3 fstat(3, {st_mode=S_IFREG|0644, st_size=147662, ...}) = 0 mmap(NULL, 147662, PROT_READ, MAP_PRIVATE, 3, 0) = 0x7f82f78d8000 close(3) = 0 access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or directory) open("/lib/x86_64-linux-gnu/libc.so.6", O_RDONLY|O_CLOEXEC) = 3 read(3, "\177ELF\2\1\1\3\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0P\t\2\0\0\0\0\0"..., 832) = 832 fstat(3, {st_mode=S_IFREG|0755, st_size=1868984, ...}) = 0 mmap(NULL, 3971488, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7f82f7310000 ...$ strace df -h execve("/bin/df", ["df", "-h"], [/* 50 vars */]) = 0 brk(NULL) = 0x136e000 access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or directory) mmap(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f82f78fd000 access("/etc/ld.so.preload", R_OK) = -1 ENOENT (No such file or directory) open("/etc/ld.so.cache", O_RDONLY|O_CLOEXEC) = 3 fstat(3, {st_mode=S_IFREG|0644, st_size=147662, ...}) = 0 mmap(NULL, 147662, PROT_READ, MAP_PRIVATE, 3, 0) = 0x7f82f78d8000 close(3) = 0 access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or directory) open("/lib/x86_64-linux-gnu/libc.so.6", O_RDONLY|O_CLOEXEC) = 3 read(3, "\177ELF\2\1\1\3\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0P\t\2\0\0\0\0\0"..., 832) = 832 fstat(3, {st_mode=S_IFREG|0755, st_size=1868984, ...}) = 0 mmap(NULL, 3971488, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7f82f7310000 ...$ strace df -h execve("/bin/df", ["df", "-h"], [/* 50 vars */]) = 0 brk(NULL) = 0x136e000 access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or directory) mmap(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f82f78fd000 access("/etc/ld.so.preload", R_OK) = -1 ENOENT (No such file or directory) open("/etc/ld.so.cache", O_RDONLY|O_CLOEXEC) = 3 fstat(3, {st_mode=S_IFREG|0644, st_size=147662, ...}) = 0 mmap(NULL, 147662, PROT_READ, MAP_PRIVATE, 3, 0) = 0x7f82f78d8000 close(3) = 0 access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or directory) open("/lib/x86_64-linux-gnu/libc.so.6", O_RDONLY|O_CLOEXEC) = 3 read(3, "\177ELF\2\1\1\3\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0P\t\2\0\0\0\0\0"..., 832) = 832 fstat(3, {st_mode=S_IFREG|0755, st_size=1868984, ...}) = 0 mmap(NULL, 3971488, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7f82f7310000 ...$ strace df -h execve("/bin/df", ["df", "-h"], [/* 50 vars */]) = 0 brk(NULL) = 0x136e000 access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or directory) mmap(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f82f78fd000 access("/etc/ld.so.preload", R_OK) = -1 ENOENT (No such file or directory) open("/etc/ld.so.cache", O_RDONLY|O_CLOEXEC) = 3 fstat(3, {st_mode=S_IFREG|0644, st_size=147662, ...}) = 0 mmap(NULL, 147662, PROT_READ, MAP_PRIVATE, 3, 0) = 0x7f82f78d8000 close(3) = 0 access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or directory) open("/lib/x86_64-linux-gnu/libc.so.6", O_RDONLY|O_CLOEXEC) = 3 read(3, "\177ELF\2\1\1\3\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0P\t\2\0\0\0\0\0"..., 832) = 832 fstat(3, {st_mode=S_IFREG|0755, st_size=1868984, ...}) = 0 mmap(NULL, 3971488, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7f82f7310000 ...$ strace df -h execve("/bin/df", ["df", "-h"], [/* 50 vars */]) = 0 brk(NULL) = 0x136e000 access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or directory) mmap(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f82f78fd000 access("/etc/ld.so.preload", R_OK) = -1 ENOENT (No such file or directory) open("/etc/ld.so.cache", O_RDONLY|O_CLOEXEC) = 3 fstat(3, {st_mode=S_IFREG|0644, st_size=147662, ...}) = 0 mmap(NULL, 147662, PROT_READ, MAP_PRIVATE, 3, 0) = 0x7f82f78d8000 close(3) = 0 access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or directory) open("/lib/x86_64-linux-gnu/libc.so.6", O_RDONLY|O_CLOEXEC) = 3 read(3, "\177ELF\2\1\1\3\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0P\t\2\0\0\0\0\0"..., 832) = 832 fstat(3, {st_mode=S_IFREG|0755, st_size=1868984, ...}) = 0 mmap(NULL, 3971488, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7f82f7310000 ...$ strace df -h execve("/bin/df", ["df", "-h"], [/* 50 vars */]) = 0 brk(NULL) = 0x136e000 access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or directory) mmap(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f82f78fd000 access("/etc/ld.so.preload", R_OK) = -1 ENOENT (No such file or directory) open("/etc/ld.so.cache", O_RDONLY|O_CLOEXEC) = 3 fstat(3, {st_mode=S_IFREG|0644, st_size=147662, ...}) = 0 mmap(NULL, 147662, PROT_READ, MAP_PRIVATE, 3, 0) = 0x7f82f78d8000 close(3) = 0 access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or directory) open("/lib/x86_64-linux-gnu/libc.so.6", O_RDONLY|O_CLOEXEC) = 3 read(3, "\177ELF\2\1\1\3\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0P\t\2\0\0\0\0\0"..., 832) = 832 fstat(3, {st_mode=S_IFREG|0755, st_size=1868984, ...}) = 0 mmap(NULL, 3971488, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7f82f7310000 ...$ strace df -h execve("/bin/df", ["df", "-h"], [/* 50 vars */]) = 0 brk(NULL) = 0x136e000 access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or directory) mmap(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f82f78fd000 access("/etc/ld.so.preload", R_OK) = -1 ENOENT (No such file or directory) open("/etc/ld.so.cache", O_RDONLY|O_CLOEXEC) = 3 fstat(3, {st_mode=S_IFREG|0644, st_size=147662, ...}) = 0 mmap(NULL, 147662, PROT_READ, MAP_PRIVATE, 3, 0) = 0x7f82f78d8000 close(3) = 0 access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or directory) open("/lib/x86_64-linux-gnu/libc.so.6", O_RDONLY|O_CLOEXEC) = 3 read(3, "\177ELF\2\1\1\3\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0P\t\2\0\0\0\0\0"..., 832) = 832 fstat(3, {st_mode=S_IFREG|0755, st_size=1868984, ...}) = 0 mmap(NULL, 3971488, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7f82f7310000 ...$ strace df -h execve("/bin/df", ["df", "-h"], [/* 50 vars */]) = 0 brk(NULL) = 0x136e000 access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or directory) mmap(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f82f78fd000 access("/etc/ld.so.preload", R_OK) = -1 ENOENT (No such file or directory) open("/etc/ld.so.cache", O_RDONLY|O_CLOEXEC) = 3 fstat(3, {st_mode=S_IFREG|0644, st_size=147662, ...}) = 0 mmap(NULL, 147662, PROT_READ, MAP_PRIVATE, 3, 0) = 0x7f82f78d8000 close(3) = 0 access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or directory) open("/lib/x86_64-linux-gnu/libc.so.6", O_RDONLY|O_CLOEXEC) = 3 read(3, "\177ELF\2\1\1\3\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0P\t\2\0\0\0\0\0"..., 832) = 832 fstat(3, {st_mode=S_IFREG|0755, st_size=1868984, ...}) = 0 mmap(NULL, 3971488, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7f82f7310000 ...$ strace df -h execve("/bin/df", ["df", "-h"], [/* 50 vars */]) = 0 brk(NULL) = 0x136e000 access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or directory) mmap(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f82f78fd000 access("/etc/ld.so.preload", R_OK) = -1 ENOENT (No such file or directory) open("/etc/ld.so.cache", O_RDONLY|O_CLOEXEC) = 3 fstat(3, {st_mode=S_IFREG|0644, st_size=147662, ...}) = 0 mmap(NULL, 147662, PROT_READ, MAP_PRIVATE, 3, 0) = 0x7f82f78d8000 close(3) = 0 access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or directory) open("/lib/x86_64-linux-gnu/libc.so.6", O_RDONLY|O_CLOEXEC) = 3 read(3, "\177ELF\2\1\1\3\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0P\t\2\0\0\0\0\0"..., 832) = 832 fstat(3, {st_mode=S_IFREG|0755, st_size=1868984, ...}) = 0 mmap(NULL, 3971488, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7f82f7310000 ...$ strace df -h execve("/bin/df", ["df", "-h"], [/* 50 vars */]) = 0 brk(NULL) = 0x136e000 access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or directory) mmap(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f82f78fd000 access("/etc/ld.so.preload", R_OK) = -1 ENOENT (No such file or directory) open("/etc/ld.so.cache", O_RDONLY|O_CLOEXEC) = 3 fstat(3, {st_mode=S_IFREG|0644, st_size=147662, ...}) = 0 mmap(NULL, 147662, PROT_READ, MAP_PRIVATE, 3, 0) = 0x7f82f78d8000 close(3) = 0 access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or directory) open("/lib/x86_64-linux-gnu/libc.so.6", O_RDONLY|O_CLOEXEC) = 3 read(3, "\177ELF\2\1\1\3\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0P\t\2\0\0\0\0\0"..., 832) = 832 fstat(3, {st_mode=S_IFREG|0755, st_size=1868984, ...}) = 0 mmap(NULL, 3971488, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7f82f7310000 ...$ strace df -h execve("/bin/df", ["df", "-h"], [/* 50 vars */]) = 0 brk(NULL) = 0x136e000 access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or directory) mmap(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f82f78fd000 access("/etc/ld.so.preload", R_OK) = -1 ENOENT (No such file or directory) open("/etc/ld.so.cache", O_RDONLY|O_CLOEXEC) = 3 fstat(3, {st_mode=S_IFREG|0644, st_size=147662, ...}) = 0 mmap(NULL, 147662, PROT_READ, MAP_PRIVATE, 3, 0) = 0x7f82f78d8000 close(3) = 0 access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or directory) open("/lib/x86_64-linux-gnu/libc.so.6", O_RDONLY|O_CLOEXEC) = 3 read(3, "\177ELF\2\1\1\3\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0P\t\2\0\0\0\0\0"..., 832) = 832 fstat(3, {st_mode=S_IFREG|0755, st_size=1868984, ...}) = 0 mmap(NULL, 3971488, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7f82f7310000 ...$ strace df -h execve("/bin/df", ["df", "-h"], [/* 50 vars */]) = 0 brk(NULL) = 0x136e000 access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or directory) mmap(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f82f78fd000 access("/etc/ld.so.preload", R_OK) = -1 ENOENT (No such file or directory) open("/etc/ld.so.cache", O_RDONLY|O_CLOEXEC) = 3 fstat(3, {st_mode=S_IFREG|0644, st_size=147662, ...}) = 0 mmap(NULL, 147662, PROT_READ, MAP_PRIVATE, 3, 0) = 0x7f82f78d8000 close(3) = 0 access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or directory) open("/lib/x86_64-linux-gnu/libc.so.6", O_RDONLY|O_CLOEXEC) = 3 read(3, "\177ELF\2\1\1\3\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0P\t\2\0\0\0\0\0"..., 832) = 832 fstat(3, {st_mode=S_IFREG|0755, st_size=1868984, ...}) = 0 mmap(NULL, 3971488, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7f82f7310000 ...$ strace df -h execve("/bin/df", ["df", "-h"], [/* 50 vars */]) = 0 brk(NULL) = 0x136e000 access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or directory) mmap(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f82f78fd000 access("/etc/ld.so.preload", R_OK) = -1 ENOENT (No such file or directory) open("/etc/ld.so.cache", O_RDONLY|O_CLOEXEC) = 3 fstat(3, {st_mode=S_IFREG|0644, st_size=147662, ...}) = 0 mmap(NULL, 147662, PROT_READ, MAP_PRIVATE, 3, 0) = 0x7f82f78d8000 close(3) = 0 access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or directory) open("/lib/x86_64-linux-gnu/libc.so.6", O_RDONLY|O_CLOEXEC) = 3 read(3, "\177ELF\2\1\1\3\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0P\t\2\0\0\0\0\0"..., 832) = 832 fstat(3, {st_mode=S_IFREG|0755, st_size=1868984, ...}) = 0 mmap(NULL, 3971488, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7f82f7310000 ...$ strace df -h execve("/bin/df", ["df", "-h"], [/* 50 vars */]) = 0 brk(NULL) = 0x136e000 access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or directory) mmap(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f82f78fd000 access("/etc/ld.so.preload", R_OK) = -1 ENOENT (No such file or directory) open("/etc/ld.so.cache", O_RDONLY|O_CLOEXEC) = 3 fstat(3, {st_mode=S_IFREG|0644, st_size=147662, ...}) = 0 mmap(NULL, 147662, PROT_READ, MAP_PRIVATE, 3, 0) = 0x7f82f78d8000 close(3) = 0 access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or directory) open("/lib/x86_64-linux-gnu/libc.so.6", O_RDONLY|O_CLOEXEC) = 3 read(3, "\177ELF\2\1\1\3\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0P\t\2\0\0\0\0\0"..., 832) = 832 fstat(3, {st_mode=S_IFREG|0755, st_size=1868984, ...}) = 0 mmap(NULL, 3971488, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7f82f7310000 ...$ strace df -h execve("/bin/df", ["df", "-h"], [/* 50 vars */]) = 0 brk(NULL) = 0x136e000 access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or directory) mmap(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f82f78fd000 access("/etc/ld.so.preload", R_OK) = -1 ENOENT (No such file or directory) open("/etc/ld.so.cache", O_RDONLY|O_CLOEXEC) = 3 fstat(3, {st_mode=S_IFREG|0644, st_size=147662, ...}) = 0 mmap(NULL, 147662, PROT_READ, MAP_PRIVATE, 3, 0) = 0x7f82f78d8000 close(3) = 0 access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or directory) open("/lib/x86_64-linux-gnu/libc.so.6", O_RDONLY|O_CLOEXEC) = 3 read(3, "\177ELF\2\1\1\3\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0P\t\2\0\0\0\0\0"..., 832) = 832 fstat(3, {st_mode=S_IFREG|0755, st_size=1868984, ...}) = 0 mmap(NULL, 3971488, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7f82f7310000 ...$ strace df -h execve("/bin/df", ["df", "-h"], [/* 50 vars */]) = 0 brk(NULL) = 0x136e000 access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or directory) mmap(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f82f78fd000 access("/etc/ld.so.preload", R_OK) = -1 ENOENT (No such file or directory) open("/etc/ld.so.cache", O_RDONLY|O_CLOEXEC) = 3 fstat(3, {st_mode=S_IFREG|0644, st_size=147662, ...}) = 0 mmap(NULL, 147662, PROT_READ, MAP_PRIVATE, 3, 0) = 0x7f82f78d8000 close(3) = 0 access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or directory) open("/lib/x86_64-linux-gnu/libc.so.6", O_RDONLY|O_CLOEXEC) = 3 read(3, "\177ELF\2\1\1\3\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0P\t\2\0\0\0\0\0"..., 832) = 832 fstat(3, {st_mode=S_IFREG|0755, st_size=1868984, ...}) = 0 mmap(NULL, 3971488, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7f82f7310000 ...Ülaltoodud väljundist näete näiteks erinevat tüüpi süsteemikõnesid, mille on teinud käsk df.
open("/etc/ld.so.cache", O_RDONLY|O_CLOEXEC) = 3Kus:
- avatud - on süsteemikõne tüüp
- („/etc/ld.so.cache”, O_RDONLY | O_CLOEXEC) - süsteemikõne argument
- 3 - süsteemi kõne tagasivõtmise väärtus
Allpool on näidisväljund, mis näitab kirjutamissüsteemi kõnesid, mis kuvab ekraanil df käsu väljundi.
mmap(NULL, 26258, PROT_READ, MAP_SHARED, 3, 0) = 0x7f82f78f5000 close(3) = 0 fstat(1, {st_mode=S_IFCHR|0620, st_rdev=makedev(136, 1), ...}) = 0 write(1, "Filesystem Size Used Avail"..., 49Filesystem Size Used Avail Use% Mounted on ) = 49 write(1, "udev 3.9G 0 3.9G"..., 43udev 3.9G 0 3.9G 0% /dev ) = 43 write(1, "tmpfs 788M 9.6M 779M"..., 43tmpfs 788M 9.6M 779M 2% /run ) = 43 write(1, "/dev/sda10 324G 252G 56G"..., 40/dev/sda10 324G 252G 56G 82% / ) = 40 write(1, "tmpfs 3.9G 104M 3.8G"..., 47tmpfs 3.9G 104M 3.8G 3% /dev/shm ) = 47 write(1, "tmpfs 5.0M 4.0K 5.0M"..., 48tmpfs 5.0M 4.0K 5.0M 1% /run/lock ) = 48 write(1, "tmpfs 3.9G 0 3.9G"..., 53tmpfs 3.9G 0 3.9G 0% /sys/fs/cgroup ) = 53 write(1, "cgmfs 100K 0 100K"..., 56cgmfs 100K 0 100K 0% /run/cgmanager/fs ) = 56 write(1, "tmpfs 788M 36K 788M"..., 53tmpfs 788M 36K 788M 1% /run/user/1000 ) = 53 close(1) = 0 close(2) = 0 exit_group(0) = ? +++ exited with 0 +++
2. Jälgige Linuxi protsessi PID-d
Kui protsess juba töötab, saate selle jälgida, edastades selle PID lihtsalt järgmiselt; see täidab teie ekraani jätkuva väljundiga, mis näitab protsessi poolt tehtud süsteemikõnesid. Selle lõpetamiseks vajutage klahvi [Ctrl + C]
.
$ sudo strace -p 3569 strace: Process 3569 attached restart_syscall(<... resuming interrupted poll ...>) = 1 recvmsg(4, {msg_name(0)=NULL, msg_iov(1)=[{"U0!70$ sudo strace -p 3569 strace: Process 3569 attached restart_syscall(<... resuming interrupted poll ...>) = 1 recvmsg(4, {msg_name(0)=NULL, msg_iov(1)=[{"U\2\24\300!\247\330\0\3\24\4\0\20\0\0\0\0\0\0\24\24\24\24\24\0\0\3\37%\2\0\0", 4096}], msg_controllen=0, msg_flags=0}, 0) = 32 recvmsg(4, 0x7ffee4dbf870, 0) = -1 EAGAIN (Resource temporarily unavailable) recvmsg(4, 0x7ffee4dbf850, 0) = -1 EAGAIN (Resource temporarily unavailable) poll([{fd=3, events=POLLIN}, {fd=4, events=POLLIN}, {fd=5, events=POLLIN}, {fd=10, events=POLLIN}, {fd=30, events=POLLIN}, {fd=31, events=POLLIN}], 6, -1) = 1 ([{fd=31, revents=POLLIN}]) read(31, "\372", 1) = 1 recvmsg(4, 0x7ffee4dbf850, 0) = -1 EAGAIN (Resource temporarily unavailable) poll([{fd=3, events=POLLIN}, {fd=4, events=POLLIN}, {fd=5, events=POLLIN}, {fd=10, events=POLLIN}, {fd=30, events=POLLIN}, {fd=31, events=POLLIN}], 6, 0) = 1 ([{fd=31, revents=POLLIN}]) read(31, "\372", 1) = 1 recvmsg(4, 0x7ffee4dbf850, 0) = -1 EAGAIN (Resource temporarily unavailable) poll([{fd=3, events=POLLIN}, {fd=4, events=POLLIN}, {fd=5, events=POLLIN}, {fd=10, events=POLLIN}, {fd=30, events=POLLIN}, {fd=31, events=POLLIN}], 6, 0) = 0 (Timeout) mprotect(0x207faa20000, 8192, PROT_READ|PROT_WRITE) = 0 mprotect(0x207faa20000, 8192, PROT_READ|PROT_EXEC) = 0 mprotect(0x207faa21000, 4096, PROT_READ|PROT_WRITE) = 0 mprotect(0x207faa21000, 4096, PROT_READ|PROT_EXEC) = 0 ...$ sudo strace -p 3569 strace: Process 3569 attached restart_syscall(<... resuming interrupted poll ...>) = 1 recvmsg(4, {msg_name(0)=NULL, msg_iov(1)=[{"U\2\24\300!\247\330\0\3\24\4\0\20\0\0\0\0\0\0\24\24\24\24\24\0\0\3\37%\2\0\0", 4096}], msg_controllen=0, msg_flags=0}, 0) = 32 recvmsg(4, 0x7ffee4dbf870, 0) = -1 EAGAIN (Resource temporarily unavailable) recvmsg(4, 0x7ffee4dbf850, 0) = -1 EAGAIN (Resource temporarily unavailable) poll([{fd=3, events=POLLIN}, {fd=4, events=POLLIN}, {fd=5, events=POLLIN}, {fd=10, events=POLLIN}, {fd=30, events=POLLIN}, {fd=31, events=POLLIN}], 6, -1) = 1 ([{fd=31, revents=POLLIN}]) read(31, "\372", 1) = 1 recvmsg(4, 0x7ffee4dbf850, 0) = -1 EAGAIN (Resource temporarily unavailable) poll([{fd=3, events=POLLIN}, {fd=4, events=POLLIN}, {fd=5, events=POLLIN}, {fd=10, events=POLLIN}, {fd=30, events=POLLIN}, {fd=31, events=POLLIN}], 6, 0) = 1 ([{fd=31, revents=POLLIN}]) read(31, "\372", 1) = 1 recvmsg(4, 0x7ffee4dbf850, 0) = -1 EAGAIN (Resource temporarily unavailable) poll([{fd=3, events=POLLIN}, {fd=4, events=POLLIN}, {fd=5, events=POLLIN}, {fd=10, events=POLLIN}, {fd=30, events=POLLIN}, {fd=31, events=POLLIN}], 6, 0) = 0 (Timeout) mprotect(0x207faa20000, 8192, PROT_READ|PROT_WRITE) = 0 mprotect(0x207faa20000, 8192, PROT_READ|PROT_EXEC) = 0 mprotect(0x207faa21000, 4096, PROT_READ|PROT_WRITE) = 0 mprotect(0x207faa21000, 4096, PROT_READ|PROT_EXEC) = 0 ...$ sudo strace -p 3569 strace: Process 3569 attached restart_syscall(<... resuming interrupted poll ...>) = 1 recvmsg(4, {msg_name(0)=NULL, msg_iov(1)=[{"U\2\24\300!\247\330\0\3\24\4\0\20\0\0\0\0\0\0\24\24\24\24\24\0\0\3\37%\2\0\0", 4096}], msg_controllen=0, msg_flags=0}, 0) = 32 recvmsg(4, 0x7ffee4dbf870, 0) = -1 EAGAIN (Resource temporarily unavailable) recvmsg(4, 0x7ffee4dbf850, 0) = -1 EAGAIN (Resource temporarily unavailable) poll([{fd=3, events=POLLIN}, {fd=4, events=POLLIN}, {fd=5, events=POLLIN}, {fd=10, events=POLLIN}, {fd=30, events=POLLIN}, {fd=31, events=POLLIN}], 6, -1) = 1 ([{fd=31, revents=POLLIN}]) read(31, "\372", 1) = 1 recvmsg(4, 0x7ffee4dbf850, 0) = -1 EAGAIN (Resource temporarily unavailable) poll([{fd=3, events=POLLIN}, {fd=4, events=POLLIN}, {fd=5, events=POLLIN}, {fd=10, events=POLLIN}, {fd=30, events=POLLIN}, {fd=31, events=POLLIN}], 6, 0) = 1 ([{fd=31, revents=POLLIN}]) read(31, "\372", 1) = 1 recvmsg(4, 0x7ffee4dbf850, 0) = -1 EAGAIN (Resource temporarily unavailable) poll([{fd=3, events=POLLIN}, {fd=4, events=POLLIN}, {fd=5, events=POLLIN}, {fd=10, events=POLLIN}, {fd=30, events=POLLIN}, {fd=31, events=POLLIN}], 6, 0) = 0 (Timeout) mprotect(0x207faa20000, 8192, PROT_READ|PROT_WRITE) = 0 mprotect(0x207faa20000, 8192, PROT_READ|PROT_EXEC) = 0 mprotect(0x207faa21000, 4096, PROT_READ|PROT_WRITE) = 0 mprotect(0x207faa21000, 4096, PROT_READ|PROT_EXEC) = 0 ...$ sudo strace -p 3569 strace: Process 3569 attached restart_syscall(<... resuming interrupted poll ...>) = 1 recvmsg(4, {msg_name(0)=NULL, msg_iov(1)=[{"U\2\24\300!\247\330\0\3\24\4\0\20\0\0\0\0\0\0\24\24\24\24\24\0\0\3\37%\2\0\0", 4096}], msg_controllen=0, msg_flags=0}, 0) = 32 recvmsg(4, 0x7ffee4dbf870, 0) = -1 EAGAIN (Resource temporarily unavailable) recvmsg(4, 0x7ffee4dbf850, 0) = -1 EAGAIN (Resource temporarily unavailable) poll([{fd=3, events=POLLIN}, {fd=4, events=POLLIN}, {fd=5, events=POLLIN}, {fd=10, events=POLLIN}, {fd=30, events=POLLIN}, {fd=31, events=POLLIN}], 6, -1) = 1 ([{fd=31, revents=POLLIN}]) read(31, "\372", 1) = 1 recvmsg(4, 0x7ffee4dbf850, 0) = -1 EAGAIN (Resource temporarily unavailable) poll([{fd=3, events=POLLIN}, {fd=4, events=POLLIN}, {fd=5, events=POLLIN}, {fd=10, events=POLLIN}, {fd=30, events=POLLIN}, {fd=31, events=POLLIN}], 6, 0) = 1 ([{fd=31, revents=POLLIN}]) read(31, "\372", 1) = 1 recvmsg(4, 0x7ffee4dbf850, 0) = -1 EAGAIN (Resource temporarily unavailable) poll([{fd=3, events=POLLIN}, {fd=4, events=POLLIN}, {fd=5, events=POLLIN}, {fd=10, events=POLLIN}, {fd=30, events=POLLIN}, {fd=31, events=POLLIN}], 6, 0) = 0 (Timeout) mprotect(0x207faa20000, 8192, PROT_READ|PROT_WRITE) = 0 mprotect(0x207faa20000, 8192, PROT_READ|PROT_EXEC) = 0 mprotect(0x207faa21000, 4096, PROT_READ|PROT_WRITE) = 0 mprotect(0x207faa21000, 4096, PROT_READ|PROT_EXEC) = 0 ...$ sudo strace -p 3569 strace: Process 3569 attached restart_syscall(<... resuming interrupted poll ...>) = 1 recvmsg(4, {msg_name(0)=NULL, msg_iov(1)=[{"U\2\24\300!\247\330\0\3\24\4\0\20\0\0\0\0\0\0\24\24\24\24\24\0\0\3\37%\2\0\0", 4096}], msg_controllen=0, msg_flags=0}, 0) = 32 recvmsg(4, 0x7ffee4dbf870, 0) = -1 EAGAIN (Resource temporarily unavailable) recvmsg(4, 0x7ffee4dbf850, 0) = -1 EAGAIN (Resource temporarily unavailable) poll([{fd=3, events=POLLIN}, {fd=4, events=POLLIN}, {fd=5, events=POLLIN}, {fd=10, events=POLLIN}, {fd=30, events=POLLIN}, {fd=31, events=POLLIN}], 6, -1) = 1 ([{fd=31, revents=POLLIN}]) read(31, "\372", 1) = 1 recvmsg(4, 0x7ffee4dbf850, 0) = -1 EAGAIN (Resource temporarily unavailable) poll([{fd=3, events=POLLIN}, {fd=4, events=POLLIN}, {fd=5, events=POLLIN}, {fd=10, events=POLLIN}, {fd=30, events=POLLIN}, {fd=31, events=POLLIN}], 6, 0) = 1 ([{fd=31, revents=POLLIN}]) read(31, "\372", 1) = 1 recvmsg(4, 0x7ffee4dbf850, 0) = -1 EAGAIN (Resource temporarily unavailable) poll([{fd=3, events=POLLIN}, {fd=4, events=POLLIN}, {fd=5, events=POLLIN}, {fd=10, events=POLLIN}, {fd=30, events=POLLIN}, {fd=31, events=POLLIN}], 6, 0) = 0 (Timeout) mprotect(0x207faa20000, 8192, PROT_READ|PROT_WRITE) = 0 mprotect(0x207faa20000, 8192, PROT_READ|PROT_EXEC) = 0 mprotect(0x207faa21000, 4096, PROT_READ|PROT_WRITE) = 0 mprotect(0x207faa21000, 4096, PROT_READ|PROT_EXEC) = 0 ...$ sudo strace -p 3569 strace: Process 3569 attached restart_syscall(<... resuming interrupted poll ...>) = 1 recvmsg(4, {msg_name(0)=NULL, msg_iov(1)=[{"U\2\24\300!\247\330\0\3\24\4\0\20\0\0\0\0\0\0\24\24\24\24\24\0\0\3\37%\2\0\0", 4096}], msg_controllen=0, msg_flags=0}, 0) = 32 recvmsg(4, 0x7ffee4dbf870, 0) = -1 EAGAIN (Resource temporarily unavailable) recvmsg(4, 0x7ffee4dbf850, 0) = -1 EAGAIN (Resource temporarily unavailable) poll([{fd=3, events=POLLIN}, {fd=4, events=POLLIN}, {fd=5, events=POLLIN}, {fd=10, events=POLLIN}, {fd=30, events=POLLIN}, {fd=31, events=POLLIN}], 6, -1) = 1 ([{fd=31, revents=POLLIN}]) read(31, "\372", 1) = 1 recvmsg(4, 0x7ffee4dbf850, 0) = -1 EAGAIN (Resource temporarily unavailable) poll([{fd=3, events=POLLIN}, {fd=4, events=POLLIN}, {fd=5, events=POLLIN}, {fd=10, events=POLLIN}, {fd=30, events=POLLIN}, {fd=31, events=POLLIN}], 6, 0) = 1 ([{fd=31, revents=POLLIN}]) read(31, "\372", 1) = 1 recvmsg(4, 0x7ffee4dbf850, 0) = -1 EAGAIN (Resource temporarily unavailable) poll([{fd=3, events=POLLIN}, {fd=4, events=POLLIN}, {fd=5, events=POLLIN}, {fd=10, events=POLLIN}, {fd=30, events=POLLIN}, {fd=31, events=POLLIN}], 6, 0) = 0 (Timeout) mprotect(0x207faa20000, 8192, PROT_READ|PROT_WRITE) = 0 mprotect(0x207faa20000, 8192, PROT_READ|PROT_EXEC) = 0 mprotect(0x207faa21000, 4096, PROT_READ|PROT_WRITE) = 0 mprotect(0x207faa21000, 4096, PROT_READ|PROT_EXEC) = 0 ...$ sudo strace -p 3569 strace: Process 3569 attached restart_syscall(<... resuming interrupted poll ...>) = 1 recvmsg(4, {msg_name(0)=NULL, msg_iov(1)=[{"U\2\24\300!\247\330\0\3\24\4\0\20\0\0\0\0\0\0\24\24\24\24\24\0\0\3\37%\2\0\0", 4096}], msg_controllen=0, msg_flags=0}, 0) = 32 recvmsg(4, 0x7ffee4dbf870, 0) = -1 EAGAIN (Resource temporarily unavailable) recvmsg(4, 0x7ffee4dbf850, 0) = -1 EAGAIN (Resource temporarily unavailable) poll([{fd=3, events=POLLIN}, {fd=4, events=POLLIN}, {fd=5, events=POLLIN}, {fd=10, events=POLLIN}, {fd=30, events=POLLIN}, {fd=31, events=POLLIN}], 6, -1) = 1 ([{fd=31, revents=POLLIN}]) read(31, "\372", 1) = 1 recvmsg(4, 0x7ffee4dbf850, 0) = -1 EAGAIN (Resource temporarily unavailable) poll([{fd=3, events=POLLIN}, {fd=4, events=POLLIN}, {fd=5, events=POLLIN}, {fd=10, events=POLLIN}, {fd=30, events=POLLIN}, {fd=31, events=POLLIN}], 6, 0) = 1 ([{fd=31, revents=POLLIN}]) read(31, "\372", 1) = 1 recvmsg(4, 0x7ffee4dbf850, 0) = -1 EAGAIN (Resource temporarily unavailable) poll([{fd=3, events=POLLIN}, {fd=4, events=POLLIN}, {fd=5, events=POLLIN}, {fd=10, events=POLLIN}, {fd=30, events=POLLIN}, {fd=31, events=POLLIN}], 6, 0) = 0 (Timeout) mprotect(0x207faa20000, 8192, PROT_READ|PROT_WRITE) = 0 mprotect(0x207faa20000, 8192, PROT_READ|PROT_EXEC) = 0 mprotect(0x207faa21000, 4096, PROT_READ|PROT_WRITE) = 0 mprotect(0x207faa21000, 4096, PROT_READ|PROT_EXEC) = 0 ...$ sudo strace -p 3569 strace: Process 3569 attached restart_syscall(<... resuming interrupted poll ...>) = 1 recvmsg(4, {msg_name(0)=NULL, msg_iov(1)=[{"U\2\24\300!\247\330\0\3\24\4\0\20\0\0\0\0\0\0\24\24\24\24\24\0\0\3\37%\2\0\0", 4096}], msg_controllen=0, msg_flags=0}, 0) = 32 recvmsg(4, 0x7ffee4dbf870, 0) = -1 EAGAIN (Resource temporarily unavailable) recvmsg(4, 0x7ffee4dbf850, 0) = -1 EAGAIN (Resource temporarily unavailable) poll([{fd=3, events=POLLIN}, {fd=4, events=POLLIN}, {fd=5, events=POLLIN}, {fd=10, events=POLLIN}, {fd=30, events=POLLIN}, {fd=31, events=POLLIN}], 6, -1) = 1 ([{fd=31, revents=POLLIN}]) read(31, "\372", 1) = 1 recvmsg(4, 0x7ffee4dbf850, 0) = -1 EAGAIN (Resource temporarily unavailable) poll([{fd=3, events=POLLIN}, {fd=4, events=POLLIN}, {fd=5, events=POLLIN}, {fd=10, events=POLLIN}, {fd=30, events=POLLIN}, {fd=31, events=POLLIN}], 6, 0) = 1 ([{fd=31, revents=POLLIN}]) read(31, "\372", 1) = 1 recvmsg(4, 0x7ffee4dbf850, 0) = -1 EAGAIN (Resource temporarily unavailable) poll([{fd=3, events=POLLIN}, {fd=4, events=POLLIN}, {fd=5, events=POLLIN}, {fd=10, events=POLLIN}, {fd=30, events=POLLIN}, {fd=31, events=POLLIN}], 6, 0) = 0 (Timeout) mprotect(0x207faa20000, 8192, PROT_READ|PROT_WRITE) = 0 mprotect(0x207faa20000, 8192, PROT_READ|PROT_EXEC) = 0 mprotect(0x207faa21000, 4096, PROT_READ|PROT_WRITE) = 0 mprotect(0x207faa21000, 4096, PROT_READ|PROT_EXEC) = 0 ...$ sudo strace -p 3569 strace: Process 3569 attached restart_syscall(<... resuming interrupted poll ...>) = 1 recvmsg(4, {msg_name(0)=NULL, msg_iov(1)=[{"U\2\24\300!\247\330\0\3\24\4\0\20\0\0\0\0\0\0\24\24\24\24\24\0\0\3\37%\2\0\0", 4096}], msg_controllen=0, msg_flags=0}, 0) = 32 recvmsg(4, 0x7ffee4dbf870, 0) = -1 EAGAIN (Resource temporarily unavailable) recvmsg(4, 0x7ffee4dbf850, 0) = -1 EAGAIN (Resource temporarily unavailable) poll([{fd=3, events=POLLIN}, {fd=4, events=POLLIN}, {fd=5, events=POLLIN}, {fd=10, events=POLLIN}, {fd=30, events=POLLIN}, {fd=31, events=POLLIN}], 6, -1) = 1 ([{fd=31, revents=POLLIN}]) read(31, "\372", 1) = 1 recvmsg(4, 0x7ffee4dbf850, 0) = -1 EAGAIN (Resource temporarily unavailable) poll([{fd=3, events=POLLIN}, {fd=4, events=POLLIN}, {fd=5, events=POLLIN}, {fd=10, events=POLLIN}, {fd=30, events=POLLIN}, {fd=31, events=POLLIN}], 6, 0) = 1 ([{fd=31, revents=POLLIN}]) read(31, "\372", 1) = 1 recvmsg(4, 0x7ffee4dbf850, 0) = -1 EAGAIN (Resource temporarily unavailable) poll([{fd=3, events=POLLIN}, {fd=4, events=POLLIN}, {fd=5, events=POLLIN}, {fd=10, events=POLLIN}, {fd=30, events=POLLIN}, {fd=31, events=POLLIN}], 6, 0) = 0 (Timeout) mprotect(0x207faa20000, 8192, PROT_READ|PROT_WRITE) = 0 mprotect(0x207faa20000, 8192, PROT_READ|PROT_EXEC) = 0 mprotect(0x207faa21000, 4096, PROT_READ|PROT_WRITE) = 0 mprotect(0x207faa21000, 4096, PROT_READ|PROT_EXEC) = 0 ...$ sudo strace -p 3569 strace: Process 3569 attached restart_syscall(<... resuming interrupted poll ...>) = 1 recvmsg(4, {msg_name(0)=NULL, msg_iov(1)=[{"U\2\24\300!\247\330\0\3\24\4\0\20\0\0\0\0\0\0\24\24\24\24\24\0\0\3\37%\2\0\0", 4096}], msg_controllen=0, msg_flags=0}, 0) = 32 recvmsg(4, 0x7ffee4dbf870, 0) = -1 EAGAIN (Resource temporarily unavailable) recvmsg(4, 0x7ffee4dbf850, 0) = -1 EAGAIN (Resource temporarily unavailable) poll([{fd=3, events=POLLIN}, {fd=4, events=POLLIN}, {fd=5, events=POLLIN}, {fd=10, events=POLLIN}, {fd=30, events=POLLIN}, {fd=31, events=POLLIN}], 6, -1) = 1 ([{fd=31, revents=POLLIN}]) read(31, "\372", 1) = 1 recvmsg(4, 0x7ffee4dbf850, 0) = -1 EAGAIN (Resource temporarily unavailable) poll([{fd=3, events=POLLIN}, {fd=4, events=POLLIN}, {fd=5, events=POLLIN}, {fd=10, events=POLLIN}, {fd=30, events=POLLIN}, {fd=31, events=POLLIN}], 6, 0) = 1 ([{fd=31, revents=POLLIN}]) read(31, "\372", 1) = 1 recvmsg(4, 0x7ffee4dbf850, 0) = -1 EAGAIN (Resource temporarily unavailable) poll([{fd=3, events=POLLIN}, {fd=4, events=POLLIN}, {fd=5, events=POLLIN}, {fd=10, events=POLLIN}, {fd=30, events=POLLIN}, {fd=31, events=POLLIN}], 6, 0) = 0 (Timeout) mprotect(0x207faa20000, 8192, PROT_READ|PROT_WRITE) = 0 mprotect(0x207faa20000, 8192, PROT_READ|PROT_EXEC) = 0 mprotect(0x207faa21000, 4096, PROT_READ|PROT_WRITE) = 0 mprotect(0x207faa21000, 4096, PROT_READ|PROT_EXEC) = 0 ...$ sudo strace -p 3569 strace: Process 3569 attached restart_syscall(<... resuming interrupted poll ...>) = 1 recvmsg(4, {msg_name(0)=NULL, msg_iov(1)=[{"U\2\24\300!\247\330\0\3\24\4\0\20\0\0\0\0\0\0\24\24\24\24\24\0\0\3\37%\2\0\0", 4096}], msg_controllen=0, msg_flags=0}, 0) = 32 recvmsg(4, 0x7ffee4dbf870, 0) = -1 EAGAIN (Resource temporarily unavailable) recvmsg(4, 0x7ffee4dbf850, 0) = -1 EAGAIN (Resource temporarily unavailable) poll([{fd=3, events=POLLIN}, {fd=4, events=POLLIN}, {fd=5, events=POLLIN}, {fd=10, events=POLLIN}, {fd=30, events=POLLIN}, {fd=31, events=POLLIN}], 6, -1) = 1 ([{fd=31, revents=POLLIN}]) read(31, "\372", 1) = 1 recvmsg(4, 0x7ffee4dbf850, 0) = -1 EAGAIN (Resource temporarily unavailable) poll([{fd=3, events=POLLIN}, {fd=4, events=POLLIN}, {fd=5, events=POLLIN}, {fd=10, events=POLLIN}, {fd=30, events=POLLIN}, {fd=31, events=POLLIN}], 6, 0) = 1 ([{fd=31, revents=POLLIN}]) read(31, "\372", 1) = 1 recvmsg(4, 0x7ffee4dbf850, 0) = -1 EAGAIN (Resource temporarily unavailable) poll([{fd=3, events=POLLIN}, {fd=4, events=POLLIN}, {fd=5, events=POLLIN}, {fd=10, events=POLLIN}, {fd=30, events=POLLIN}, {fd=31, events=POLLIN}], 6, 0) = 0 (Timeout) mprotect(0x207faa20000, 8192, PROT_READ|PROT_WRITE) = 0 mprotect(0x207faa20000, 8192, PROT_READ|PROT_EXEC) = 0 mprotect(0x207faa21000, 4096, PROT_READ|PROT_WRITE) = 0 mprotect(0x207faa21000, 4096, PROT_READ|PROT_EXEC) = 0 ...$ sudo strace -p 3569 strace: Process 3569 attached restart_syscall(<... resuming interrupted poll ...>) = 1 recvmsg(4, {msg_name(0)=NULL, msg_iov(1)=[{"U\2\24\300!\247\330\0\3\24\4\0\20\0\0\0\0\0\0\24\24\24\24\24\0\0\3\37%\2\0\0", 4096}], msg_controllen=0, msg_flags=0}, 0) = 32 recvmsg(4, 0x7ffee4dbf870, 0) = -1 EAGAIN (Resource temporarily unavailable) recvmsg(4, 0x7ffee4dbf850, 0) = -1 EAGAIN (Resource temporarily unavailable) poll([{fd=3, events=POLLIN}, {fd=4, events=POLLIN}, {fd=5, events=POLLIN}, {fd=10, events=POLLIN}, {fd=30, events=POLLIN}, {fd=31, events=POLLIN}], 6, -1) = 1 ([{fd=31, revents=POLLIN}]) read(31, "\372", 1) = 1 recvmsg(4, 0x7ffee4dbf850, 0) = -1 EAGAIN (Resource temporarily unavailable) poll([{fd=3, events=POLLIN}, {fd=4, events=POLLIN}, {fd=5, events=POLLIN}, {fd=10, events=POLLIN}, {fd=30, events=POLLIN}, {fd=31, events=POLLIN}], 6, 0) = 1 ([{fd=31, revents=POLLIN}]) read(31, "\372", 1) = 1 recvmsg(4, 0x7ffee4dbf850, 0) = -1 EAGAIN (Resource temporarily unavailable) poll([{fd=3, events=POLLIN}, {fd=4, events=POLLIN}, {fd=5, events=POLLIN}, {fd=10, events=POLLIN}, {fd=30, events=POLLIN}, {fd=31, events=POLLIN}], 6, 0) = 0 (Timeout) mprotect(0x207faa20000, 8192, PROT_READ|PROT_WRITE) = 0 mprotect(0x207faa20000, 8192, PROT_READ|PROT_EXEC) = 0 mprotect(0x207faa21000, 4096, PROT_READ|PROT_WRITE) = 0 mprotect(0x207faa21000, 4096, PROT_READ|PROT_EXEC) = 0 ...3. Hankige Linuxi protsessi kokkuvõte
Lipu
-c
abil saate genereerida aruande kõigi süsteemikõnede koguaja, kõnede ja vigade kohta järgmiselt.$ sudo strace -c -p 3569 strace: Process 3569 attached ^Cstrace: Process 3569 detached % time seconds usecs/call calls errors syscall ------ ----------- ----------- --------- --------- ---------------- 99.73 0.016000 8 1971 poll 0.16 0.000025 0 509 75 futex 0.06 0.000010 0 1985 1966 recvmsg 0.06 0.000009 0 2336 mprotect 0.00 0.000000 0 478 read 0.00 0.000000 0 13 write 0.00 0.000000 0 29 mmap 0.00 0.000000 0 9 munmap 0.00 0.000000 0 18 writev 0.00 0.000000 0 351 madvise 0.00 0.000000 0 1 restart_syscall ------ ----------- ----------- --------- --------- ---------------- 100.00 0.016044 7700 2041 total4. Printige juhiste kursor süsteemikõne ajal
Valik
-i
kuvab käsuosuti iga programmi poolt tehtud süsteemikõne ajal.$ sudo strace -i df -h [00007f0d7534c777] execve("/bin/df", ["df", "-h"], [/* 17 vars */]) = 0 [00007faf9cafa4b9] brk(NULL) = 0x12f0000 [00007faf9cafb387] access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or directory) [00007faf9cafb47a] mmap(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7faf9cd03000 [00007faf9cafb387] access("/etc/ld.so.preload", R_OK) = -1 ENOENT (No such file or directory) [00007faf9cafb327] open("/etc/ld.so.cache", O_RDONLY|O_CLOEXEC) = 3 [00007faf9cafb2b4] fstat(3, {st_mode=S_IFREG|0644, st_size=147662, ...}) = 0 [00007faf9cafb47a] mmap(NULL, 147662, PROT_READ, MAP_PRIVATE, 3, 0) = 0x7faf9ccde000 [00007faf9cafb427] close(3) = 0 [00007faf9cafb387] access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or directory) [00007faf9cafb327] open("/lib/x86_64-linux-gnu/libc.so.6", O_RDONLY|O_CLOEXEC) = 3 [00007faf9cafb347] read(3, "7ELF$ sudo strace -i df -h [00007f0d7534c777] execve("/bin/df", ["df", "-h"], [/* 17 vars */]) = 0 [00007faf9cafa4b9] brk(NULL) = 0x12f0000 [00007faf9cafb387] access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or directory) [00007faf9cafb47a] mmap(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7faf9cd03000 [00007faf9cafb387] access("/etc/ld.so.preload", R_OK) = -1 ENOENT (No such file or directory) [00007faf9cafb327] open("/etc/ld.so.cache", O_RDONLY|O_CLOEXEC) = 3 [00007faf9cafb2b4] fstat(3, {st_mode=S_IFREG|0644, st_size=147662, ...}) = 0 [00007faf9cafb47a] mmap(NULL, 147662, PROT_READ, MAP_PRIVATE, 3, 0) = 0x7faf9ccde000 [00007faf9cafb427] close(3) = 0 [00007faf9cafb387] access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or directory) [00007faf9cafb327] open("/lib/x86_64-linux-gnu/libc.so.6", O_RDONLY|O_CLOEXEC) = 3 [00007faf9cafb347] read(3, "\177ELF\2\1\1\3\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0P\t\2\0\0\0\0\0"..., 832) = 832 [00007faf9cafb2b4] fstat(3, {st_mode=S_IFREG|0755, st_size=1868984, ...}) = 0 [00007faf9cafb47a] mmap(NULL, 3971488, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7faf9c716000 [00007faf9cafb517] mprotect(0x7faf9c8d6000, 2097152, PROT_NONE) = 0 ...$ sudo strace -i df -h [00007f0d7534c777] execve("/bin/df", ["df", "-h"], [/* 17 vars */]) = 0 [00007faf9cafa4b9] brk(NULL) = 0x12f0000 [00007faf9cafb387] access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or directory) [00007faf9cafb47a] mmap(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7faf9cd03000 [00007faf9cafb387] access("/etc/ld.so.preload", R_OK) = -1 ENOENT (No such file or directory) [00007faf9cafb327] open("/etc/ld.so.cache", O_RDONLY|O_CLOEXEC) = 3 [00007faf9cafb2b4] fstat(3, {st_mode=S_IFREG|0644, st_size=147662, ...}) = 0 [00007faf9cafb47a] mmap(NULL, 147662, PROT_READ, MAP_PRIVATE, 3, 0) = 0x7faf9ccde000 [00007faf9cafb427] close(3) = 0 [00007faf9cafb387] access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or directory) [00007faf9cafb327] open("/lib/x86_64-linux-gnu/libc.so.6", O_RDONLY|O_CLOEXEC) = 3 [00007faf9cafb347] read(3, "\177ELF\2\1\1\3\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0P\t\2\0\0\0\0\0"..., 832) = 832 [00007faf9cafb2b4] fstat(3, {st_mode=S_IFREG|0755, st_size=1868984, ...}) = 0 [00007faf9cafb47a] mmap(NULL, 3971488, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7faf9c716000 [00007faf9cafb517] mprotect(0x7faf9c8d6000, 2097152, PROT_NONE) = 0 ...$ sudo strace -i df -h [00007f0d7534c777] execve("/bin/df", ["df", "-h"], [/* 17 vars */]) = 0 [00007faf9cafa4b9] brk(NULL) = 0x12f0000 [00007faf9cafb387] access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or directory) [00007faf9cafb47a] mmap(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7faf9cd03000 [00007faf9cafb387] access("/etc/ld.so.preload", R_OK) = -1 ENOENT (No such file or directory) [00007faf9cafb327] open("/etc/ld.so.cache", O_RDONLY|O_CLOEXEC) = 3 [00007faf9cafb2b4] fstat(3, {st_mode=S_IFREG|0644, st_size=147662, ...}) = 0 [00007faf9cafb47a] mmap(NULL, 147662, PROT_READ, MAP_PRIVATE, 3, 0) = 0x7faf9ccde000 [00007faf9cafb427] close(3) = 0 [00007faf9cafb387] access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or directory) [00007faf9cafb327] open("/lib/x86_64-linux-gnu/libc.so.6", O_RDONLY|O_CLOEXEC) = 3 [00007faf9cafb347] read(3, "\177ELF\2\1\1\3\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0P\t\2\0\0\0\0\0"..., 832) = 832 [00007faf9cafb2b4] fstat(3, {st_mode=S_IFREG|0755, st_size=1868984, ...}) = 0 [00007faf9cafb47a] mmap(NULL, 3971488, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7faf9c716000 [00007faf9cafb517] mprotect(0x7faf9c8d6000, 2097152, PROT_NONE) = 0 ...$ sudo strace -i df -h [00007f0d7534c777] execve("/bin/df", ["df", "-h"], [/* 17 vars */]) = 0 [00007faf9cafa4b9] brk(NULL) = 0x12f0000 [00007faf9cafb387] access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or directory) [00007faf9cafb47a] mmap(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7faf9cd03000 [00007faf9cafb387] access("/etc/ld.so.preload", R_OK) = -1 ENOENT (No such file or directory) [00007faf9cafb327] open("/etc/ld.so.cache", O_RDONLY|O_CLOEXEC) = 3 [00007faf9cafb2b4] fstat(3, {st_mode=S_IFREG|0644, st_size=147662, ...}) = 0 [00007faf9cafb47a] mmap(NULL, 147662, PROT_READ, MAP_PRIVATE, 3, 0) = 0x7faf9ccde000 [00007faf9cafb427] close(3) = 0 [00007faf9cafb387] access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or directory) [00007faf9cafb327] open("/lib/x86_64-linux-gnu/libc.so.6", O_RDONLY|O_CLOEXEC) = 3 [00007faf9cafb347] read(3, "\177ELF\2\1\1\3\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0P\t\2\0\0\0\0\0"..., 832) = 832 [00007faf9cafb2b4] fstat(3, {st_mode=S_IFREG|0755, st_size=1868984, ...}) = 0 [00007faf9cafb47a] mmap(NULL, 3971488, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7faf9c716000 [00007faf9cafb517] mprotect(0x7faf9c8d6000, 2097152, PROT_NONE) = 0 ...$ sudo strace -i df -h [00007f0d7534c777] execve("/bin/df", ["df", "-h"], [/* 17 vars */]) = 0 [00007faf9cafa4b9] brk(NULL) = 0x12f0000 [00007faf9cafb387] access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or directory) [00007faf9cafb47a] mmap(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7faf9cd03000 [00007faf9cafb387] access("/etc/ld.so.preload", R_OK) = -1 ENOENT (No such file or directory) [00007faf9cafb327] open("/etc/ld.so.cache", O_RDONLY|O_CLOEXEC) = 3 [00007faf9cafb2b4] fstat(3, {st_mode=S_IFREG|0644, st_size=147662, ...}) = 0 [00007faf9cafb47a] mmap(NULL, 147662, PROT_READ, MAP_PRIVATE, 3, 0) = 0x7faf9ccde000 [00007faf9cafb427] close(3) = 0 [00007faf9cafb387] access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or directory) [00007faf9cafb327] open("/lib/x86_64-linux-gnu/libc.so.6", O_RDONLY|O_CLOEXEC) = 3 [00007faf9cafb347] read(3, "\177ELF\2\1\1\3\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0P\t\2\0\0\0\0\0"..., 832) = 832 [00007faf9cafb2b4] fstat(3, {st_mode=S_IFREG|0755, st_size=1868984, ...}) = 0 [00007faf9cafb47a] mmap(NULL, 3971488, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7faf9c716000 [00007faf9cafb517] mprotect(0x7faf9c8d6000, 2097152, PROT_NONE) = 0 ...$ sudo strace -i df -h [00007f0d7534c777] execve("/bin/df", ["df", "-h"], [/* 17 vars */]) = 0 [00007faf9cafa4b9] brk(NULL) = 0x12f0000 [00007faf9cafb387] access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or directory) [00007faf9cafb47a] mmap(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7faf9cd03000 [00007faf9cafb387] access("/etc/ld.so.preload", R_OK) = -1 ENOENT (No such file or directory) [00007faf9cafb327] open("/etc/ld.so.cache", O_RDONLY|O_CLOEXEC) = 3 [00007faf9cafb2b4] fstat(3, {st_mode=S_IFREG|0644, st_size=147662, ...}) = 0 [00007faf9cafb47a] mmap(NULL, 147662, PROT_READ, MAP_PRIVATE, 3, 0) = 0x7faf9ccde000 [00007faf9cafb427] close(3) = 0 [00007faf9cafb387] access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or directory) [00007faf9cafb327] open("/lib/x86_64-linux-gnu/libc.so.6", O_RDONLY|O_CLOEXEC) = 3 [00007faf9cafb347] read(3, "\177ELF\2\1\1\3\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0P\t\2\0\0\0\0\0"..., 832) = 832 [00007faf9cafb2b4] fstat(3, {st_mode=S_IFREG|0755, st_size=1868984, ...}) = 0 [00007faf9cafb47a] mmap(NULL, 3971488, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7faf9c716000 [00007faf9cafb517] mprotect(0x7faf9c8d6000, 2097152, PROT_NONE) = 0 ...$ sudo strace -i df -h [00007f0d7534c777] execve("/bin/df", ["df", "-h"], [/* 17 vars */]) = 0 [00007faf9cafa4b9] brk(NULL) = 0x12f0000 [00007faf9cafb387] access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or directory) [00007faf9cafb47a] mmap(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7faf9cd03000 [00007faf9cafb387] access("/etc/ld.so.preload", R_OK) = -1 ENOENT (No such file or directory) [00007faf9cafb327] open("/etc/ld.so.cache", O_RDONLY|O_CLOEXEC) = 3 [00007faf9cafb2b4] fstat(3, {st_mode=S_IFREG|0644, st_size=147662, ...}) = 0 [00007faf9cafb47a] mmap(NULL, 147662, PROT_READ, MAP_PRIVATE, 3, 0) = 0x7faf9ccde000 [00007faf9cafb427] close(3) = 0 [00007faf9cafb387] access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or directory) [00007faf9cafb327] open("/lib/x86_64-linux-gnu/libc.so.6", O_RDONLY|O_CLOEXEC) = 3 [00007faf9cafb347] read(3, "\177ELF\2\1\1\3\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0P\t\2\0\0\0\0\0"..., 832) = 832 [00007faf9cafb2b4] fstat(3, {st_mode=S_IFREG|0755, st_size=1868984, ...}) = 0 [00007faf9cafb47a] mmap(NULL, 3971488, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7faf9c716000 [00007faf9cafb517] mprotect(0x7faf9c8d6000, 2097152, PROT_NONE) = 0 ...$ sudo strace -i df -h [00007f0d7534c777] execve("/bin/df", ["df", "-h"], [/* 17 vars */]) = 0 [00007faf9cafa4b9] brk(NULL) = 0x12f0000 [00007faf9cafb387] access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or directory) [00007faf9cafb47a] mmap(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7faf9cd03000 [00007faf9cafb387] access("/etc/ld.so.preload", R_OK) = -1 ENOENT (No such file or directory) [00007faf9cafb327] open("/etc/ld.so.cache", O_RDONLY|O_CLOEXEC) = 3 [00007faf9cafb2b4] fstat(3, {st_mode=S_IFREG|0644, st_size=147662, ...}) = 0 [00007faf9cafb47a] mmap(NULL, 147662, PROT_READ, MAP_PRIVATE, 3, 0) = 0x7faf9ccde000 [00007faf9cafb427] close(3) = 0 [00007faf9cafb387] access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or directory) [00007faf9cafb327] open("/lib/x86_64-linux-gnu/libc.so.6", O_RDONLY|O_CLOEXEC) = 3 [00007faf9cafb347] read(3, "\177ELF\2\1\1\3\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0P\t\2\0\0\0\0\0"..., 832) = 832 [00007faf9cafb2b4] fstat(3, {st_mode=S_IFREG|0755, st_size=1868984, ...}) = 0 [00007faf9cafb47a] mmap(NULL, 3971488, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7faf9c716000 [00007faf9cafb517] mprotect(0x7faf9c8d6000, 2097152, PROT_NONE) = 0 ...$ sudo strace -i df -h [00007f0d7534c777] execve("/bin/df", ["df", "-h"], [/* 17 vars */]) = 0 [00007faf9cafa4b9] brk(NULL) = 0x12f0000 [00007faf9cafb387] access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or directory) [00007faf9cafb47a] mmap(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7faf9cd03000 [00007faf9cafb387] access("/etc/ld.so.preload", R_OK) = -1 ENOENT (No such file or directory) [00007faf9cafb327] open("/etc/ld.so.cache", O_RDONLY|O_CLOEXEC) = 3 [00007faf9cafb2b4] fstat(3, {st_mode=S_IFREG|0644, st_size=147662, ...}) = 0 [00007faf9cafb47a] mmap(NULL, 147662, PROT_READ, MAP_PRIVATE, 3, 0) = 0x7faf9ccde000 [00007faf9cafb427] close(3) = 0 [00007faf9cafb387] access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or directory) [00007faf9cafb327] open("/lib/x86_64-linux-gnu/libc.so.6", O_RDONLY|O_CLOEXEC) = 3 [00007faf9cafb347] read(3, "\177ELF\2\1\1\3\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0P\t\2\0\0\0\0\0"..., 832) = 832 [00007faf9cafb2b4] fstat(3, {st_mode=S_IFREG|0755, st_size=1868984, ...}) = 0 [00007faf9cafb47a] mmap(NULL, 3971488, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7faf9c716000 [00007faf9cafb517] mprotect(0x7faf9c8d6000, 2097152, PROT_NONE) = 0 ...$ sudo strace -i df -h [00007f0d7534c777] execve("/bin/df", ["df", "-h"], [/* 17 vars */]) = 0 [00007faf9cafa4b9] brk(NULL) = 0x12f0000 [00007faf9cafb387] access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or directory) [00007faf9cafb47a] mmap(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7faf9cd03000 [00007faf9cafb387] access("/etc/ld.so.preload", R_OK) = -1 ENOENT (No such file or directory) [00007faf9cafb327] open("/etc/ld.so.cache", O_RDONLY|O_CLOEXEC) = 3 [00007faf9cafb2b4] fstat(3, {st_mode=S_IFREG|0644, st_size=147662, ...}) = 0 [00007faf9cafb47a] mmap(NULL, 147662, PROT_READ, MAP_PRIVATE, 3, 0) = 0x7faf9ccde000 [00007faf9cafb427] close(3) = 0 [00007faf9cafb387] access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or directory) [00007faf9cafb327] open("/lib/x86_64-linux-gnu/libc.so.6", O_RDONLY|O_CLOEXEC) = 3 [00007faf9cafb347] read(3, "\177ELF\2\1\1\3\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0P\t\2\0\0\0\0\0"..., 832) = 832 [00007faf9cafb2b4] fstat(3, {st_mode=S_IFREG|0755, st_size=1868984, ...}) = 0 [00007faf9cafb47a] mmap(NULL, 3971488, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7faf9c716000 [00007faf9cafb517] mprotect(0x7faf9c8d6000, 2097152, PROT_NONE) = 0 ...$ sudo strace -i df -h [00007f0d7534c777] execve("/bin/df", ["df", "-h"], [/* 17 vars */]) = 0 [00007faf9cafa4b9] brk(NULL) = 0x12f0000 [00007faf9cafb387] access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or directory) [00007faf9cafb47a] mmap(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7faf9cd03000 [00007faf9cafb387] access("/etc/ld.so.preload", R_OK) = -1 ENOENT (No such file or directory) [00007faf9cafb327] open("/etc/ld.so.cache", O_RDONLY|O_CLOEXEC) = 3 [00007faf9cafb2b4] fstat(3, {st_mode=S_IFREG|0644, st_size=147662, ...}) = 0 [00007faf9cafb47a] mmap(NULL, 147662, PROT_READ, MAP_PRIVATE, 3, 0) = 0x7faf9ccde000 [00007faf9cafb427] close(3) = 0 [00007faf9cafb387] access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or directory) [00007faf9cafb327] open("/lib/x86_64-linux-gnu/libc.so.6", O_RDONLY|O_CLOEXEC) = 3 [00007faf9cafb347] read(3, "\177ELF\2\1\1\3\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0P\t\2\0\0\0\0\0"..., 832) = 832 [00007faf9cafb2b4] fstat(3, {st_mode=S_IFREG|0755, st_size=1868984, ...}) = 0 [00007faf9cafb47a] mmap(NULL, 3971488, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7faf9c716000 [00007faf9cafb517] mprotect(0x7faf9c8d6000, 2097152, PROT_NONE) = 0 ...$ sudo strace -i df -h [00007f0d7534c777] execve("/bin/df", ["df", "-h"], [/* 17 vars */]) = 0 [00007faf9cafa4b9] brk(NULL) = 0x12f0000 [00007faf9cafb387] access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or directory) [00007faf9cafb47a] mmap(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7faf9cd03000 [00007faf9cafb387] access("/etc/ld.so.preload", R_OK) = -1 ENOENT (No such file or directory) [00007faf9cafb327] open("/etc/ld.so.cache", O_RDONLY|O_CLOEXEC) = 3 [00007faf9cafb2b4] fstat(3, {st_mode=S_IFREG|0644, st_size=147662, ...}) = 0 [00007faf9cafb47a] mmap(NULL, 147662, PROT_READ, MAP_PRIVATE, 3, 0) = 0x7faf9ccde000 [00007faf9cafb427] close(3) = 0 [00007faf9cafb387] access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or directory) [00007faf9cafb327] open("/lib/x86_64-linux-gnu/libc.so.6", O_RDONLY|O_CLOEXEC) = 3 [00007faf9cafb347] read(3, "\177ELF\2\1\1\3\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0P\t\2\0\0\0\0\0"..., 832) = 832 [00007faf9cafb2b4] fstat(3, {st_mode=S_IFREG|0755, st_size=1868984, ...}) = 0 [00007faf9cafb47a] mmap(NULL, 3971488, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7faf9c716000 [00007faf9cafb517] mprotect(0x7faf9c8d6000, 2097152, PROT_NONE) = 0 ...$ sudo strace -i df -h [00007f0d7534c777] execve("/bin/df", ["df", "-h"], [/* 17 vars */]) = 0 [00007faf9cafa4b9] brk(NULL) = 0x12f0000 [00007faf9cafb387] access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or directory) [00007faf9cafb47a] mmap(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7faf9cd03000 [00007faf9cafb387] access("/etc/ld.so.preload", R_OK) = -1 ENOENT (No such file or directory) [00007faf9cafb327] open("/etc/ld.so.cache", O_RDONLY|O_CLOEXEC) = 3 [00007faf9cafb2b4] fstat(3, {st_mode=S_IFREG|0644, st_size=147662, ...}) = 0 [00007faf9cafb47a] mmap(NULL, 147662, PROT_READ, MAP_PRIVATE, 3, 0) = 0x7faf9ccde000 [00007faf9cafb427] close(3) = 0 [00007faf9cafb387] access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or directory) [00007faf9cafb327] open("/lib/x86_64-linux-gnu/libc.so.6", O_RDONLY|O_CLOEXEC) = 3 [00007faf9cafb347] read(3, "\177ELF\2\1\1\3\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0P\t\2\0\0\0\0\0"..., 832) = 832 [00007faf9cafb2b4] fstat(3, {st_mode=S_IFREG|0755, st_size=1868984, ...}) = 0 [00007faf9cafb47a] mmap(NULL, 3971488, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7faf9c716000 [00007faf9cafb517] mprotect(0x7faf9c8d6000, 2097152, PROT_NONE) = 0 ...$ sudo strace -i df -h [00007f0d7534c777] execve("/bin/df", ["df", "-h"], [/* 17 vars */]) = 0 [00007faf9cafa4b9] brk(NULL) = 0x12f0000 [00007faf9cafb387] access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or directory) [00007faf9cafb47a] mmap(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7faf9cd03000 [00007faf9cafb387] access("/etc/ld.so.preload", R_OK) = -1 ENOENT (No such file or directory) [00007faf9cafb327] open("/etc/ld.so.cache", O_RDONLY|O_CLOEXEC) = 3 [00007faf9cafb2b4] fstat(3, {st_mode=S_IFREG|0644, st_size=147662, ...}) = 0 [00007faf9cafb47a] mmap(NULL, 147662, PROT_READ, MAP_PRIVATE, 3, 0) = 0x7faf9ccde000 [00007faf9cafb427] close(3) = 0 [00007faf9cafb387] access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or directory) [00007faf9cafb327] open("/lib/x86_64-linux-gnu/libc.so.6", O_RDONLY|O_CLOEXEC) = 3 [00007faf9cafb347] read(3, "\177ELF\2\1\1\3\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0P\t\2\0\0\0\0\0"..., 832) = 832 [00007faf9cafb2b4] fstat(3, {st_mode=S_IFREG|0755, st_size=1868984, ...}) = 0 [00007faf9cafb47a] mmap(NULL, 3971488, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7faf9c716000 [00007faf9cafb517] mprotect(0x7faf9c8d6000, 2097152, PROT_NONE) = 0 ...$ sudo strace -i df -h [00007f0d7534c777] execve("/bin/df", ["df", "-h"], [/* 17 vars */]) = 0 [00007faf9cafa4b9] brk(NULL) = 0x12f0000 [00007faf9cafb387] access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or directory) [00007faf9cafb47a] mmap(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7faf9cd03000 [00007faf9cafb387] access("/etc/ld.so.preload", R_OK) = -1 ENOENT (No such file or directory) [00007faf9cafb327] open("/etc/ld.so.cache", O_RDONLY|O_CLOEXEC) = 3 [00007faf9cafb2b4] fstat(3, {st_mode=S_IFREG|0644, st_size=147662, ...}) = 0 [00007faf9cafb47a] mmap(NULL, 147662, PROT_READ, MAP_PRIVATE, 3, 0) = 0x7faf9ccde000 [00007faf9cafb427] close(3) = 0 [00007faf9cafb387] access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or directory) [00007faf9cafb327] open("/lib/x86_64-linux-gnu/libc.so.6", O_RDONLY|O_CLOEXEC) = 3 [00007faf9cafb347] read(3, "\177ELF\2\1\1\3\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0P\t\2\0\0\0\0\0"..., 832) = 832 [00007faf9cafb2b4] fstat(3, {st_mode=S_IFREG|0755, st_size=1868984, ...}) = 0 [00007faf9cafb47a] mmap(NULL, 3971488, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7faf9c716000 [00007faf9cafb517] mprotect(0x7faf9c8d6000, 2097152, PROT_NONE) = 0 ...$ sudo strace -i df -h [00007f0d7534c777] execve("/bin/df", ["df", "-h"], [/* 17 vars */]) = 0 [00007faf9cafa4b9] brk(NULL) = 0x12f0000 [00007faf9cafb387] access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or directory) [00007faf9cafb47a] mmap(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7faf9cd03000 [00007faf9cafb387] access("/etc/ld.so.preload", R_OK) = -1 ENOENT (No such file or directory) [00007faf9cafb327] open("/etc/ld.so.cache", O_RDONLY|O_CLOEXEC) = 3 [00007faf9cafb2b4] fstat(3, {st_mode=S_IFREG|0644, st_size=147662, ...}) = 0 [00007faf9cafb47a] mmap(NULL, 147662, PROT_READ, MAP_PRIVATE, 3, 0) = 0x7faf9ccde000 [00007faf9cafb427] close(3) = 0 [00007faf9cafb387] access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or directory) [00007faf9cafb327] open("/lib/x86_64-linux-gnu/libc.so.6", O_RDONLY|O_CLOEXEC) = 3 [00007faf9cafb347] read(3, "\177ELF\2\1\1\3\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0P\t\2\0\0\0\0\0"..., 832) = 832 [00007faf9cafb2b4] fstat(3, {st_mode=S_IFREG|0755, st_size=1868984, ...}) = 0 [00007faf9cafb47a] mmap(NULL, 3971488, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7faf9c716000 [00007faf9cafb517] mprotect(0x7faf9c8d6000, 2097152, PROT_NONE) = 0 ...$ sudo strace -i df -h [00007f0d7534c777] execve("/bin/df", ["df", "-h"], [/* 17 vars */]) = 0 [00007faf9cafa4b9] brk(NULL) = 0x12f0000 [00007faf9cafb387] access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or directory) [00007faf9cafb47a] mmap(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7faf9cd03000 [00007faf9cafb387] access("/etc/ld.so.preload", R_OK) = -1 ENOENT (No such file or directory) [00007faf9cafb327] open("/etc/ld.so.cache", O_RDONLY|O_CLOEXEC) = 3 [00007faf9cafb2b4] fstat(3, {st_mode=S_IFREG|0644, st_size=147662, ...}) = 0 [00007faf9cafb47a] mmap(NULL, 147662, PROT_READ, MAP_PRIVATE, 3, 0) = 0x7faf9ccde000 [00007faf9cafb427] close(3) = 0 [00007faf9cafb387] access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or directory) [00007faf9cafb327] open("/lib/x86_64-linux-gnu/libc.so.6", O_RDONLY|O_CLOEXEC) = 3 [00007faf9cafb347] read(3, "\177ELF\2\1\1\3\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0P\t\2\0\0\0\0\0"..., 832) = 832 [00007faf9cafb2b4] fstat(3, {st_mode=S_IFREG|0755, st_size=1868984, ...}) = 0 [00007faf9cafb47a] mmap(NULL, 3971488, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7faf9c716000 [00007faf9cafb517] mprotect(0x7faf9c8d6000, 2097152, PROT_NONE) = 0 ...$ sudo strace -i df -h [00007f0d7534c777] execve("/bin/df", ["df", "-h"], [/* 17 vars */]) = 0 [00007faf9cafa4b9] brk(NULL) = 0x12f0000 [00007faf9cafb387] access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or directory) [00007faf9cafb47a] mmap(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7faf9cd03000 [00007faf9cafb387] access("/etc/ld.so.preload", R_OK) = -1 ENOENT (No such file or directory) [00007faf9cafb327] open("/etc/ld.so.cache", O_RDONLY|O_CLOEXEC) = 3 [00007faf9cafb2b4] fstat(3, {st_mode=S_IFREG|0644, st_size=147662, ...}) = 0 [00007faf9cafb47a] mmap(NULL, 147662, PROT_READ, MAP_PRIVATE, 3, 0) = 0x7faf9ccde000 [00007faf9cafb427] close(3) = 0 [00007faf9cafb387] access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or directory) [00007faf9cafb327] open("/lib/x86_64-linux-gnu/libc.so.6", O_RDONLY|O_CLOEXEC) = 3 [00007faf9cafb347] read(3, "\177ELF\2\1\1\3\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0P\t\2\0\0\0\0\0"..., 832) = 832 [00007faf9cafb2b4] fstat(3, {st_mode=S_IFREG|0755, st_size=1868984, ...}) = 0 [00007faf9cafb47a] mmap(NULL, 3971488, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7faf9c716000 [00007faf9cafb517] mprotect(0x7faf9c8d6000, 2097152, PROT_NONE) = 0 ...5. Näidake iga jälje väljundliini kellaaega
Samuti saate jälje väljundisse printida iga rea kellaaja, läbides lipu
-t
.$ sudo strace -t df -h 15:19:25 execve("/bin/df", ["df", "-h"], [/* 17 vars */]) = 0 15:19:25 brk(NULL) = 0x234c000 15:19:25 access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or directory) 15:19:25 mmap(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f8c7f1d9000 15:19:25 access("/etc/ld.so.preload", R_OK) = -1 ENOENT (No such file or directory) 15:19:25 open("/etc/ld.so.cache", O_RDONLY|O_CLOEXEC) = 3 15:19:25 fstat(3, {st_mode=S_IFREG|0644, st_size=147662, ...}) = 0 15:19:25 mmap(NULL, 147662, PROT_READ, MAP_PRIVATE, 3, 0) = 0x7f8c7f1b4000 15:19:25 close(3) = 0 15:19:25 access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or directory) 15:19:25 open("/lib/x86_64-linux-gnu/libc.so.6", O_RDONLY|O_CLOEXEC) = 3 15:19:25 read(3, "7ELF$ sudo strace -t df -h 15:19:25 execve("/bin/df", ["df", "-h"], [/* 17 vars */]) = 0 15:19:25 brk(NULL) = 0x234c000 15:19:25 access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or directory) 15:19:25 mmap(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f8c7f1d9000 15:19:25 access("/etc/ld.so.preload", R_OK) = -1 ENOENT (No such file or directory) 15:19:25 open("/etc/ld.so.cache", O_RDONLY|O_CLOEXEC) = 3 15:19:25 fstat(3, {st_mode=S_IFREG|0644, st_size=147662, ...}) = 0 15:19:25 mmap(NULL, 147662, PROT_READ, MAP_PRIVATE, 3, 0) = 0x7f8c7f1b4000 15:19:25 close(3) = 0 15:19:25 access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or directory) 15:19:25 open("/lib/x86_64-linux-gnu/libc.so.6", O_RDONLY|O_CLOEXEC) = 3 15:19:25 read(3, "\177ELF\2\1\1\3\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0P\t\2\0\0\0\0\0"..., 832) = 832 15:19:25 fstat(3, {st_mode=S_IFREG|0755, st_size=1868984, ...}) = 0 15:19:25 mmap(NULL, 3971488, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7f8c7ebec000 15:19:25 mprotect(0x7f8c7edac000, 2097152, PROT_NONE) = 0 ...$ sudo strace -t df -h 15:19:25 execve("/bin/df", ["df", "-h"], [/* 17 vars */]) = 0 15:19:25 brk(NULL) = 0x234c000 15:19:25 access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or directory) 15:19:25 mmap(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f8c7f1d9000 15:19:25 access("/etc/ld.so.preload", R_OK) = -1 ENOENT (No such file or directory) 15:19:25 open("/etc/ld.so.cache", O_RDONLY|O_CLOEXEC) = 3 15:19:25 fstat(3, {st_mode=S_IFREG|0644, st_size=147662, ...}) = 0 15:19:25 mmap(NULL, 147662, PROT_READ, MAP_PRIVATE, 3, 0) = 0x7f8c7f1b4000 15:19:25 close(3) = 0 15:19:25 access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or directory) 15:19:25 open("/lib/x86_64-linux-gnu/libc.so.6", O_RDONLY|O_CLOEXEC) = 3 15:19:25 read(3, "\177ELF\2\1\1\3\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0P\t\2\0\0\0\0\0"..., 832) = 832 15:19:25 fstat(3, {st_mode=S_IFREG|0755, st_size=1868984, ...}) = 0 15:19:25 mmap(NULL, 3971488, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7f8c7ebec000 15:19:25 mprotect(0x7f8c7edac000, 2097152, PROT_NONE) = 0 ...$ sudo strace -t df -h 15:19:25 execve("/bin/df", ["df", "-h"], [/* 17 vars */]) = 0 15:19:25 brk(NULL) = 0x234c000 15:19:25 access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or directory) 15:19:25 mmap(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f8c7f1d9000 15:19:25 access("/etc/ld.so.preload", R_OK) = -1 ENOENT (No such file or directory) 15:19:25 open("/etc/ld.so.cache", O_RDONLY|O_CLOEXEC) = 3 15:19:25 fstat(3, {st_mode=S_IFREG|0644, st_size=147662, ...}) = 0 15:19:25 mmap(NULL, 147662, PROT_READ, MAP_PRIVATE, 3, 0) = 0x7f8c7f1b4000 15:19:25 close(3) = 0 15:19:25 access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or directory) 15:19:25 open("/lib/x86_64-linux-gnu/libc.so.6", O_RDONLY|O_CLOEXEC) = 3 15:19:25 read(3, "\177ELF\2\1\1\3\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0P\t\2\0\0\0\0\0"..., 832) = 832 15:19:25 fstat(3, {st_mode=S_IFREG|0755, st_size=1868984, ...}) = 0 15:19:25 mmap(NULL, 3971488, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7f8c7ebec000 15:19:25 mprotect(0x7f8c7edac000, 2097152, PROT_NONE) = 0 ...$ sudo strace -t df -h 15:19:25 execve("/bin/df", ["df", "-h"], [/* 17 vars */]) = 0 15:19:25 brk(NULL) = 0x234c000 15:19:25 access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or directory) 15:19:25 mmap(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f8c7f1d9000 15:19:25 access("/etc/ld.so.preload", R_OK) = -1 ENOENT (No such file or directory) 15:19:25 open("/etc/ld.so.cache", O_RDONLY|O_CLOEXEC) = 3 15:19:25 fstat(3, {st_mode=S_IFREG|0644, st_size=147662, ...}) = 0 15:19:25 mmap(NULL, 147662, PROT_READ, MAP_PRIVATE, 3, 0) = 0x7f8c7f1b4000 15:19:25 close(3) = 0 15:19:25 access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or directory) 15:19:25 open("/lib/x86_64-linux-gnu/libc.so.6", O_RDONLY|O_CLOEXEC) = 3 15:19:25 read(3, "\177ELF\2\1\1\3\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0P\t\2\0\0\0\0\0"..., 832) = 832 15:19:25 fstat(3, {st_mode=S_IFREG|0755, st_size=1868984, ...}) = 0 15:19:25 mmap(NULL, 3971488, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7f8c7ebec000 15:19:25 mprotect(0x7f8c7edac000, 2097152, PROT_NONE) = 0 ...$ sudo strace -t df -h 15:19:25 execve("/bin/df", ["df", "-h"], [/* 17 vars */]) = 0 15:19:25 brk(NULL) = 0x234c000 15:19:25 access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or directory) 15:19:25 mmap(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f8c7f1d9000 15:19:25 access("/etc/ld.so.preload", R_OK) = -1 ENOENT (No such file or directory) 15:19:25 open("/etc/ld.so.cache", O_RDONLY|O_CLOEXEC) = 3 15:19:25 fstat(3, {st_mode=S_IFREG|0644, st_size=147662, ...}) = 0 15:19:25 mmap(NULL, 147662, PROT_READ, MAP_PRIVATE, 3, 0) = 0x7f8c7f1b4000 15:19:25 close(3) = 0 15:19:25 access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or directory) 15:19:25 open("/lib/x86_64-linux-gnu/libc.so.6", O_RDONLY|O_CLOEXEC) = 3 15:19:25 read(3, "\177ELF\2\1\1\3\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0P\t\2\0\0\0\0\0"..., 832) = 832 15:19:25 fstat(3, {st_mode=S_IFREG|0755, st_size=1868984, ...}) = 0 15:19:25 mmap(NULL, 3971488, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7f8c7ebec000 15:19:25 mprotect(0x7f8c7edac000, 2097152, PROT_NONE) = 0 ...$ sudo strace -t df -h 15:19:25 execve("/bin/df", ["df", "-h"], [/* 17 vars */]) = 0 15:19:25 brk(NULL) = 0x234c000 15:19:25 access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or directory) 15:19:25 mmap(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f8c7f1d9000 15:19:25 access("/etc/ld.so.preload", R_OK) = -1 ENOENT (No such file or directory) 15:19:25 open("/etc/ld.so.cache", O_RDONLY|O_CLOEXEC) = 3 15:19:25 fstat(3, {st_mode=S_IFREG|0644, st_size=147662, ...}) = 0 15:19:25 mmap(NULL, 147662, PROT_READ, MAP_PRIVATE, 3, 0) = 0x7f8c7f1b4000 15:19:25 close(3) = 0 15:19:25 access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or directory) 15:19:25 open("/lib/x86_64-linux-gnu/libc.so.6", O_RDONLY|O_CLOEXEC) = 3 15:19:25 read(3, "\177ELF\2\1\1\3\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0P\t\2\0\0\0\0\0"..., 832) = 832 15:19:25 fstat(3, {st_mode=S_IFREG|0755, st_size=1868984, ...}) = 0 15:19:25 mmap(NULL, 3971488, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7f8c7ebec000 15:19:25 mprotect(0x7f8c7edac000, 2097152, PROT_NONE) = 0 ...$ sudo strace -t df -h 15:19:25 execve("/bin/df", ["df", "-h"], [/* 17 vars */]) = 0 15:19:25 brk(NULL) = 0x234c000 15:19:25 access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or directory) 15:19:25 mmap(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f8c7f1d9000 15:19:25 access("/etc/ld.so.preload", R_OK) = -1 ENOENT (No such file or directory) 15:19:25 open("/etc/ld.so.cache", O_RDONLY|O_CLOEXEC) = 3 15:19:25 fstat(3, {st_mode=S_IFREG|0644, st_size=147662, ...}) = 0 15:19:25 mmap(NULL, 147662, PROT_READ, MAP_PRIVATE, 3, 0) = 0x7f8c7f1b4000 15:19:25 close(3) = 0 15:19:25 access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or directory) 15:19:25 open("/lib/x86_64-linux-gnu/libc.so.6", O_RDONLY|O_CLOEXEC) = 3 15:19:25 read(3, "\177ELF\2\1\1\3\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0P\t\2\0\0\0\0\0"..., 832) = 832 15:19:25 fstat(3, {st_mode=S_IFREG|0755, st_size=1868984, ...}) = 0 15:19:25 mmap(NULL, 3971488, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7f8c7ebec000 15:19:25 mprotect(0x7f8c7edac000, 2097152, PROT_NONE) = 0 ...$ sudo strace -t df -h 15:19:25 execve("/bin/df", ["df", "-h"], [/* 17 vars */]) = 0 15:19:25 brk(NULL) = 0x234c000 15:19:25 access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or directory) 15:19:25 mmap(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f8c7f1d9000 15:19:25 access("/etc/ld.so.preload", R_OK) = -1 ENOENT (No such file or directory) 15:19:25 open("/etc/ld.so.cache", O_RDONLY|O_CLOEXEC) = 3 15:19:25 fstat(3, {st_mode=S_IFREG|0644, st_size=147662, ...}) = 0 15:19:25 mmap(NULL, 147662, PROT_READ, MAP_PRIVATE, 3, 0) = 0x7f8c7f1b4000 15:19:25 close(3) = 0 15:19:25 access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or directory) 15:19:25 open("/lib/x86_64-linux-gnu/libc.so.6", O_RDONLY|O_CLOEXEC) = 3 15:19:25 read(3, "\177ELF\2\1\1\3\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0P\t\2\0\0\0\0\0"..., 832) = 832 15:19:25 fstat(3, {st_mode=S_IFREG|0755, st_size=1868984, ...}) = 0 15:19:25 mmap(NULL, 3971488, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7f8c7ebec000 15:19:25 mprotect(0x7f8c7edac000, 2097152, PROT_NONE) = 0 ...$ sudo strace -t df -h 15:19:25 execve("/bin/df", ["df", "-h"], [/* 17 vars */]) = 0 15:19:25 brk(NULL) = 0x234c000 15:19:25 access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or directory) 15:19:25 mmap(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f8c7f1d9000 15:19:25 access("/etc/ld.so.preload", R_OK) = -1 ENOENT (No such file or directory) 15:19:25 open("/etc/ld.so.cache", O_RDONLY|O_CLOEXEC) = 3 15:19:25 fstat(3, {st_mode=S_IFREG|0644, st_size=147662, ...}) = 0 15:19:25 mmap(NULL, 147662, PROT_READ, MAP_PRIVATE, 3, 0) = 0x7f8c7f1b4000 15:19:25 close(3) = 0 15:19:25 access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or directory) 15:19:25 open("/lib/x86_64-linux-gnu/libc.so.6", O_RDONLY|O_CLOEXEC) = 3 15:19:25 read(3, "\177ELF\2\1\1\3\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0P\t\2\0\0\0\0\0"..., 832) = 832 15:19:25 fstat(3, {st_mode=S_IFREG|0755, st_size=1868984, ...}) = 0 15:19:25 mmap(NULL, 3971488, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7f8c7ebec000 15:19:25 mprotect(0x7f8c7edac000, 2097152, PROT_NONE) = 0 ...$ sudo strace -t df -h 15:19:25 execve("/bin/df", ["df", "-h"], [/* 17 vars */]) = 0 15:19:25 brk(NULL) = 0x234c000 15:19:25 access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or directory) 15:19:25 mmap(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f8c7f1d9000 15:19:25 access("/etc/ld.so.preload", R_OK) = -1 ENOENT (No such file or directory) 15:19:25 open("/etc/ld.so.cache", O_RDONLY|O_CLOEXEC) = 3 15:19:25 fstat(3, {st_mode=S_IFREG|0644, st_size=147662, ...}) = 0 15:19:25 mmap(NULL, 147662, PROT_READ, MAP_PRIVATE, 3, 0) = 0x7f8c7f1b4000 15:19:25 close(3) = 0 15:19:25 access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or directory) 15:19:25 open("/lib/x86_64-linux-gnu/libc.so.6", O_RDONLY|O_CLOEXEC) = 3 15:19:25 read(3, "\177ELF\2\1\1\3\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0P\t\2\0\0\0\0\0"..., 832) = 832 15:19:25 fstat(3, {st_mode=S_IFREG|0755, st_size=1868984, ...}) = 0 15:19:25 mmap(NULL, 3971488, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7f8c7ebec000 15:19:25 mprotect(0x7f8c7edac000, 2097152, PROT_NONE) = 0 ...$ sudo strace -t df -h 15:19:25 execve("/bin/df", ["df", "-h"], [/* 17 vars */]) = 0 15:19:25 brk(NULL) = 0x234c000 15:19:25 access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or directory) 15:19:25 mmap(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f8c7f1d9000 15:19:25 access("/etc/ld.so.preload", R_OK) = -1 ENOENT (No such file or directory) 15:19:25 open("/etc/ld.so.cache", O_RDONLY|O_CLOEXEC) = 3 15:19:25 fstat(3, {st_mode=S_IFREG|0644, st_size=147662, ...}) = 0 15:19:25 mmap(NULL, 147662, PROT_READ, MAP_PRIVATE, 3, 0) = 0x7f8c7f1b4000 15:19:25 close(3) = 0 15:19:25 access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or directory) 15:19:25 open("/lib/x86_64-linux-gnu/libc.so.6", O_RDONLY|O_CLOEXEC) = 3 15:19:25 read(3, "\177ELF\2\1\1\3\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0P\t\2\0\0\0\0\0"..., 832) = 832 15:19:25 fstat(3, {st_mode=S_IFREG|0755, st_size=1868984, ...}) = 0 15:19:25 mmap(NULL, 3971488, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7f8c7ebec000 15:19:25 mprotect(0x7f8c7edac000, 2097152, PROT_NONE) = 0 ...$ sudo strace -t df -h 15:19:25 execve("/bin/df", ["df", "-h"], [/* 17 vars */]) = 0 15:19:25 brk(NULL) = 0x234c000 15:19:25 access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or directory) 15:19:25 mmap(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f8c7f1d9000 15:19:25 access("/etc/ld.so.preload", R_OK) = -1 ENOENT (No such file or directory) 15:19:25 open("/etc/ld.so.cache", O_RDONLY|O_CLOEXEC) = 3 15:19:25 fstat(3, {st_mode=S_IFREG|0644, st_size=147662, ...}) = 0 15:19:25 mmap(NULL, 147662, PROT_READ, MAP_PRIVATE, 3, 0) = 0x7f8c7f1b4000 15:19:25 close(3) = 0 15:19:25 access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or directory) 15:19:25 open("/lib/x86_64-linux-gnu/libc.so.6", O_RDONLY|O_CLOEXEC) = 3 15:19:25 read(3, "\177ELF\2\1\1\3\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0P\t\2\0\0\0\0\0"..., 832) = 832 15:19:25 fstat(3, {st_mode=S_IFREG|0755, st_size=1868984, ...}) = 0 15:19:25 mmap(NULL, 3971488, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7f8c7ebec000 15:19:25 mprotect(0x7f8c7edac000, 2097152, PROT_NONE) = 0 ...$ sudo strace -t df -h 15:19:25 execve("/bin/df", ["df", "-h"], [/* 17 vars */]) = 0 15:19:25 brk(NULL) = 0x234c000 15:19:25 access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or directory) 15:19:25 mmap(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f8c7f1d9000 15:19:25 access("/etc/ld.so.preload", R_OK) = -1 ENOENT (No such file or directory) 15:19:25 open("/etc/ld.so.cache", O_RDONLY|O_CLOEXEC) = 3 15:19:25 fstat(3, {st_mode=S_IFREG|0644, st_size=147662, ...}) = 0 15:19:25 mmap(NULL, 147662, PROT_READ, MAP_PRIVATE, 3, 0) = 0x7f8c7f1b4000 15:19:25 close(3) = 0 15:19:25 access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or directory) 15:19:25 open("/lib/x86_64-linux-gnu/libc.so.6", O_RDONLY|O_CLOEXEC) = 3 15:19:25 read(3, "\177ELF\2\1\1\3\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0P\t\2\0\0\0\0\0"..., 832) = 832 15:19:25 fstat(3, {st_mode=S_IFREG|0755, st_size=1868984, ...}) = 0 15:19:25 mmap(NULL, 3971488, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7f8c7ebec000 15:19:25 mprotect(0x7f8c7edac000, 2097152, PROT_NONE) = 0 ...$ sudo strace -t df -h 15:19:25 execve("/bin/df", ["df", "-h"], [/* 17 vars */]) = 0 15:19:25 brk(NULL) = 0x234c000 15:19:25 access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or directory) 15:19:25 mmap(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f8c7f1d9000 15:19:25 access("/etc/ld.so.preload", R_OK) = -1 ENOENT (No such file or directory) 15:19:25 open("/etc/ld.so.cache", O_RDONLY|O_CLOEXEC) = 3 15:19:25 fstat(3, {st_mode=S_IFREG|0644, st_size=147662, ...}) = 0 15:19:25 mmap(NULL, 147662, PROT_READ, MAP_PRIVATE, 3, 0) = 0x7f8c7f1b4000 15:19:25 close(3) = 0 15:19:25 access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or directory) 15:19:25 open("/lib/x86_64-linux-gnu/libc.so.6", O_RDONLY|O_CLOEXEC) = 3 15:19:25 read(3, "\177ELF\2\1\1\3\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0P\t\2\0\0\0\0\0"..., 832) = 832 15:19:25 fstat(3, {st_mode=S_IFREG|0755, st_size=1868984, ...}) = 0 15:19:25 mmap(NULL, 3971488, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7f8c7ebec000 15:19:25 mprotect(0x7f8c7edac000, 2097152, PROT_NONE) = 0 ...$ sudo strace -t df -h 15:19:25 execve("/bin/df", ["df", "-h"], [/* 17 vars */]) = 0 15:19:25 brk(NULL) = 0x234c000 15:19:25 access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or directory) 15:19:25 mmap(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f8c7f1d9000 15:19:25 access("/etc/ld.so.preload", R_OK) = -1 ENOENT (No such file or directory) 15:19:25 open("/etc/ld.so.cache", O_RDONLY|O_CLOEXEC) = 3 15:19:25 fstat(3, {st_mode=S_IFREG|0644, st_size=147662, ...}) = 0 15:19:25 mmap(NULL, 147662, PROT_READ, MAP_PRIVATE, 3, 0) = 0x7f8c7f1b4000 15:19:25 close(3) = 0 15:19:25 access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or directory) 15:19:25 open("/lib/x86_64-linux-gnu/libc.so.6", O_RDONLY|O_CLOEXEC) = 3 15:19:25 read(3, "\177ELF\2\1\1\3\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0P\t\2\0\0\0\0\0"..., 832) = 832 15:19:25 fstat(3, {st_mode=S_IFREG|0755, st_size=1868984, ...}) = 0 15:19:25 mmap(NULL, 3971488, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7f8c7ebec000 15:19:25 mprotect(0x7f8c7edac000, 2097152, PROT_NONE) = 0 ...$ sudo strace -t df -h 15:19:25 execve("/bin/df", ["df", "-h"], [/* 17 vars */]) = 0 15:19:25 brk(NULL) = 0x234c000 15:19:25 access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or directory) 15:19:25 mmap(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f8c7f1d9000 15:19:25 access("/etc/ld.so.preload", R_OK) = -1 ENOENT (No such file or directory) 15:19:25 open("/etc/ld.so.cache", O_RDONLY|O_CLOEXEC) = 3 15:19:25 fstat(3, {st_mode=S_IFREG|0644, st_size=147662, ...}) = 0 15:19:25 mmap(NULL, 147662, PROT_READ, MAP_PRIVATE, 3, 0) = 0x7f8c7f1b4000 15:19:25 close(3) = 0 15:19:25 access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or directory) 15:19:25 open("/lib/x86_64-linux-gnu/libc.so.6", O_RDONLY|O_CLOEXEC) = 3 15:19:25 read(3, "\177ELF\2\1\1\3\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0P\t\2\0\0\0\0\0"..., 832) = 832 15:19:25 fstat(3, {st_mode=S_IFREG|0755, st_size=1868984, ...}) = 0 15:19:25 mmap(NULL, 3971488, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7f8c7ebec000 15:19:25 mprotect(0x7f8c7edac000, 2097152, PROT_NONE) = 0 ...$ sudo strace -t df -h 15:19:25 execve("/bin/df", ["df", "-h"], [/* 17 vars */]) = 0 15:19:25 brk(NULL) = 0x234c000 15:19:25 access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or directory) 15:19:25 mmap(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f8c7f1d9000 15:19:25 access("/etc/ld.so.preload", R_OK) = -1 ENOENT (No such file or directory) 15:19:25 open("/etc/ld.so.cache", O_RDONLY|O_CLOEXEC) = 3 15:19:25 fstat(3, {st_mode=S_IFREG|0644, st_size=147662, ...}) = 0 15:19:25 mmap(NULL, 147662, PROT_READ, MAP_PRIVATE, 3, 0) = 0x7f8c7f1b4000 15:19:25 close(3) = 0 15:19:25 access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or directory) 15:19:25 open("/lib/x86_64-linux-gnu/libc.so.6", O_RDONLY|O_CLOEXEC) = 3 15:19:25 read(3, "\177ELF\2\1\1\3\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0P\t\2\0\0\0\0\0"..., 832) = 832 15:19:25 fstat(3, {st_mode=S_IFREG|0755, st_size=1868984, ...}) = 0 15:19:25 mmap(NULL, 3971488, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7f8c7ebec000 15:19:25 mprotect(0x7f8c7edac000, 2097152, PROT_NONE) = 0 ...$ sudo strace -t df -h 15:19:25 execve("/bin/df", ["df", "-h"], [/* 17 vars */]) = 0 15:19:25 brk(NULL) = 0x234c000 15:19:25 access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or directory) 15:19:25 mmap(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f8c7f1d9000 15:19:25 access("/etc/ld.so.preload", R_OK) = -1 ENOENT (No such file or directory) 15:19:25 open("/etc/ld.so.cache", O_RDONLY|O_CLOEXEC) = 3 15:19:25 fstat(3, {st_mode=S_IFREG|0644, st_size=147662, ...}) = 0 15:19:25 mmap(NULL, 147662, PROT_READ, MAP_PRIVATE, 3, 0) = 0x7f8c7f1b4000 15:19:25 close(3) = 0 15:19:25 access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or directory) 15:19:25 open("/lib/x86_64-linux-gnu/libc.so.6", O_RDONLY|O_CLOEXEC) = 3 15:19:25 read(3, "\177ELF\2\1\1\3\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0P\t\2\0\0\0\0\0"..., 832) = 832 15:19:25 fstat(3, {st_mode=S_IFREG|0755, st_size=1868984, ...}) = 0 15:19:25 mmap(NULL, 3971488, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7f8c7ebec000 15:19:25 mprotect(0x7f8c7edac000, 2097152, PROT_NONE) = 0 ...6. Süsteemikõnedes kulutatud käsuaja printimine
Ajavahe kuvamiseks iga programmi poolt tehtud süsteemikõne alguse ja lõpu vahel kasutage valikut
-T
.$ sudo strace -T df -h execve("/bin/df", ["df", "-h"], [/* 17 vars */]) = 0 <0.000287> brk(NULL) = 0xeca000 <0.000035> access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or directory) <0.000028> mmap(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f9aff2b1000 <0.000020> access("/etc/ld.so.preload", R_OK) = -1 ENOENT (No such file or directory) <0.000019> open("/etc/ld.so.cache", O_RDONLY|O_CLOEXEC) = 3 <0.000022> fstat(3, {st_mode=S_IFREG|0644, st_size=147662, ...}) = 0 <0.000015> mmap(NULL, 147662, PROT_READ, MAP_PRIVATE, 3, 0) = 0x7f9aff28c000 <0.000019> close(3) = 0 <0.000014> ...7. Jälgige ainult konkreetseid süsteemikõnesid
Allolevas käsus on
trace = write
tuntud kui kvalifitseeriv avaldis, kus jälg on kvalifikaator (teised hõlmavad signaali, lühendit, paljusõnalist, toorest, lugemist või kirjutamist). Siin on kirjutamine kvalifikatsiooni väärtus.Järgmine käsk näitab tegelikult süsteemi kõnesid df-väljundi printimiseks standardväljundile.
$ sudo strace -e trace=write df -h write(1, "Filesystem Size Used Avail"..., 49Filesystem Size Used Avail Use% Mounted on ) = 49 write(1, "udev 3.9G 0 3.9G"..., 43udev 3.9G 0 3.9G 0% /dev ) = 43 write(1, "tmpfs 788M 9.6M 779M"..., 43tmpfs 788M 9.6M 779M 2% /run ) = 43 write(1, "/dev/sda10 324G 252G 56G"..., 40/dev/sda10 324G 252G 56G 82% / ) = 40 write(1, "tmpfs 3.9G 104M 3.8G"..., 47tmpfs 3.9G 104M 3.8G 3% /dev/shm ) = 47 write(1, "tmpfs 5.0M 4.0K 5.0M"..., 48tmpfs 5.0M 4.0K 5.0M 1% /run/lock ) = 48 write(1, "tmpfs 3.9G 0 3.9G"..., 53tmpfs 3.9G 0 3.9G 0% /sys/fs/cgroup ) = 53 write(1, "cgmfs 100K 0 100K"..., 56cgmfs 100K 0 100K 0% /run/cgmanager/fs ) = 56 write(1, "tmpfs 788M 28K 788M"..., 53tmpfs 788M 28K 788M 1% /run/user/1000 ) = 53 +++ exited with 0 +++Siin on mõned täiendavad käsud jäljekvalifikaatori kohta.
$ sudo strace -e trace=open,close df -h $ sudo strace -e trace=open,close,read,write df -h $ sudo strace -e trace=all df -h8. Jälgige süsteemi kõnesid teatud tingimuste põhjal
Vaatame, kuidas jälgida konkreetse klassi sündmustega seotud süsteemikõnesid. Seda käsku saab kasutada kõigi protsessihaldusega seotud süsteemikõnede jälgimiseks.
$ sudo strace -q -e trace=process df -h execve("/bin/df", ["df", "-h"], [/* 17 vars */]) = 0 arch_prctl(ARCH_SET_FS, 0x7fe2222ff700) = 0 Filesystem Size Used Avail Use% Mounted on udev 3.9G 0 3.9G 0% /dev tmpfs 788M 9.6M 779M 2% /run /dev/sda10 324G 252G 56G 82% / tmpfs 3.9G 104M 3.8G 3% /dev/shm tmpfs 5.0M 4.0K 5.0M 1% /run/lock tmpfs 3.9G 0 3.9G 0% /sys/fs/cgroup cgmfs 100K 0 100K 0% /run/cgmanager/fs tmpfs 788M 28K 788M 1% /run/user/1000 exit_group(0) = ? +++ exited with 0 +++Järgmisena käivitage see käsk kõigi süsteemikõnede jälgimiseks, mis võtavad argumendiks failinime.
$ sudo strace -q -e trace=file df -h execve("/bin/df", ["df", "-h"], [/* 17 vars */]) = 0 access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or directory) access("/etc/ld.so.preload", R_OK) = -1 ENOENT (No such file or directory) open("/etc/ld.so.cache", O_RDONLY|O_CLOEXEC) = 3 access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or directory) open("/lib/x86_64-linux-gnu/libc.so.6", O_RDONLY|O_CLOEXEC) = 3 open("/usr/lib/locale/locale-archive", O_RDONLY|O_CLOEXEC) = 3 open("/usr/share/locale/locale.alias", O_RDONLY|O_CLOEXEC) = 3 ...Kõigi süsteemikõnede jälgimiseks, mis hõlmavad mälu kaardistamist, tippige.
$ sudo strace -q -e trace=memory df -h brk(NULL) = 0x77a000 mmap(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fe8f4658000 mmap(NULL, 147662, PROT_READ, MAP_PRIVATE, 3, 0) = 0x7fe8f4633000 mmap(NULL, 3971488, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7fe8f406b000 mprotect(0x7fe8f422b000, 2097152, PROT_NONE) = 0 mmap(0x7fe8f442b000, 24576, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x1c0000) = 0x7fe8f442b000 mmap(0x7fe8f4431000, 14752, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x7fe8f4431000 mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fe8f4632000 mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fe8f4631000 mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fe8f4630000 mprotect(0x7fe8f442b000, 16384, PROT_READ) = 0 mprotect(0x616000, 4096, PROT_READ) = 0 mprotect(0x7fe8f465a000, 4096, PROT_READ) = 0 munmap(0x7fe8f4633000, 147662) = 0 mmap(NULL, 2981280, PROT_READ, MAP_PRIVATE, 3, 0) = 0x7fe8f3d93000 brk(NULL) = 0x77a000 brk(0x79b000) = 0x79b000 mmap(NULL, 619, PROT_READ, MAP_PRIVATE, 3, 0) = 0x7fe8f4657000 mmap(NULL, 26258, PROT_READ, MAP_SHARED, 3, 0) = 0x7fe8f4650000 Filesystem Size Used Avail Use% Mounted on udev 3.9G 0 3.9G 0% /dev tmpfs 788M 9.6M 779M 2% /run /dev/sda10 324G 252G 56G 82% / tmpfs 3.9G 104M 3.8G 3% /dev/shm tmpfs 5.0M 4.0K 5.0M 1% /run/lock tmpfs 3.9G 0 3.9G 0% /sys/fs/cgroup cgmfs 100K 0 100K 0% /run/cgmanager/fs tmpfs 788M 28K 788M 1% /run/user/1000 +++ exited with 0 +++Saate jälgida kõiki võrgu- ja signaalidega seotud süsteemikõnesid.
$ sudo strace -e trace=network df -h $ sudo strace -e trace=signal df -h9. Suunake jälje väljund faili
Standardveaga saadetud jälgimissõnumite faili kirjutamiseks kasutage valikut
-o
. See tähendab, et ekraanile prinditakse ainult käsu väljund, nagu allpool näidatud.$ sudo strace -o df_debug.txt df -h Filesystem Size Used Avail Use% Mounted on udev 3.9G 0 3.9G 0% /dev tmpfs 788M 9.6M 779M 2% /run /dev/sda10 324G 252G 56G 82% / tmpfs 3.9G 104M 3.8G 3% /dev/shm tmpfs 5.0M 4.0K 5.0M 1% /run/lock tmpfs 3.9G 0 3.9G 0% /sys/fs/cgroup cgmfs 100K 0 100K 0% /run/cgmanager/fs tmpfs 788M 28K 788M 1% /run/user/1000Faili sirvimiseks kasutage kassi käsku.
$ cat df_debug.txt10. Näidake mõnda strace'i silumisväljundit
Strace-tööriista silumisteabe kuvamiseks kasutage lippu
-d
.$ strace -d df -hLisateavet leiate strace man lehelt.
$ man straceLugege ka neid kasulikke seotud artikleid:
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Kokkuvõtteks võib öelda, et strace on märkimisväärne tööriist programmi rikke põhjuste diagnoosimiseks: see on võimas silumine ja tõrkeotsing. See on praktiliselt kasulik kogenud süsteemiadministraatoritele, programmeerijatele ja häkkeritele. Selle artikli kohta käivate mõtete jagamiseks kasutage allolevat tagasisidevormi.