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...
33817 04:34:23.887627 +++ exited with 0 +++ 33816 04:34:23.887654<... wait4resumed>[{WIFEXITED(s) && WEXITSTATUS(s) == 0}], 0, NULL) = 33817 33816 04:34:23.887734 --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=33817, si_uid=0, si_status=0, si_utime=0, si...
+++ exited with 0 +++ 从跟踪的结果可以看到,系统首先调用 execve 开始一个新的进程,接着进行环境的初始化操作,最后停顿在read(0, "4\n", 1024) = 2,这也就是执行到了 scanf 函数,等待我们输入数字。在输入完 4 之后,再调用 write 函数将格式化后的数值4输出到屏幕,最后调用 exit_group 退出进程,完成...
}) = 0 write(1, "bin check.sh go install.sh l"..., 76bin check.sh go install.sh linuxc valgrind valgrind-3.17.0 workspace ) = 76 close(1) = 0 close(2) = 0 exit_group(0) = ? +++ exited with 0 +++ 是不是很惊讶,一个 ls 命令竟然产生了这么多的系统调用(当然其中也包含了...
[root@aozhejin2/usr/local/src]$strace -e open cat /dev/nullopen("/etc/ld.so.cache", O_RDONLY|O_CLOEXEC) =3open("/lib64/libc.so.6", O_RDONLY|O_CLOEXEC) =3open("/usr/lib/locale/locale-archive", O_RDONLY|O_CLOEXEC) =3open("/dev/null", O_RDONLY) =3+++ exited with0+++...
While structures are annotated using curly braces, simple pointers and arrays are printed using square brackets with commas separating elements.Hereis an example from the command ''id'' on a system with supplementary group ids: getgroups(32, [100, 0]) = 2 ...
+++ exited with 0 +++ To suppress these messages, we can use the qualifierquiet: $ strace -e quiet=exit whoami The messages we can suppress with this qualifier includingattached,exit,path-resolution,personality,thread-execve, superseded.
While structures are annotated using curly braces, simple pointers and arrays are printed using square brackets with commas separating elements.Hereis an example from the command ''id'' on a system with supplementary group ids: getgroups(32, [100, 0]) = 2 ...
- fix hang wait on exited child with exited child (#354261) - fix biarch fork/vfork (-f) tracing (#447475) - fix biarch printing of negative argument kill (#430585) - fix biarch decoding of error return values (#447587) - fix -f tracing of CLONE_VFORK (#455078) - fix...
close(3)=0 access("/etc/ld.so.nohwcap",F_OK)=-1ENOENT(Nosuchfileordirectory) openat(AT_FDCWD,"/lib/x86_64-linux-gnu/libselinux.so.1",O_RDONLY|O_CLOEXEC)=3 read(3,"\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0\260Z\0\0\0\0\0\0"...,832)=832 ...