23:07:24.675259 +++ exited with 1 +++ 可以看出,进程自己退出时(调用 exit 函数,或者从 main 函数返回), 最终调用的是 exit_group系统调用, 并且 strace 会输出 exited with X(X为退出码)。 可能有人会疑惑,代码里面明明调用的是 exit, 怎么显示为 exit_group? 这是因为这里的 exit 函数不是系统调用,...
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...
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_stime=0} --- 33816 04:34:23.887775 exit_group(0) = ? 33816 04:34:23.887839 +++ exited with 0 +++ 可以看到system执行了clone生成了一个子进程33817,然...
+++ exited with 0 +++ 如果要显示由特定进程(如SSH)打开的文件,请运行以下命令: strace -f -e open /usr/sbin/sshd 2>&1 | grep ssh Output open("/etc/ssh/sshd_config", O_RDONLY) = 3 open("/etc/ssh/ssh_host_rsa_key", O_RDONLY) = -1 EACCES (Permission denied) open("/etc/ssh/...
+++ exited with1+++[root@localhost ovs]# ls/usr/local/bin/../share/qemu/qemu/ls: cannot access/usr/local/bin/../share/qemu/qemu/: No such file or directory qemu安装 Installing /data1/qemu5.1/qemu/pc-bios/efi-eepro100.rom to/usr/share/qemu/qemuInstalling /data1/qemu5.1/qemu/pc-...
}) = 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...
close(1) = 0 close(2) = 0 exit_group(0) = ? +++ exited with 0 +++ 2. Send strace output to a file with -o option It is better to collect the stace date in a file for a analysis. -o option alloes the strace output to be redirected to file. ...
close(1) = 0 close(2) = 0 exit_group(0) = ? +++ exited with 0 +++ What are these system calls? They’re like the API for the operating system kernel. Once upon a time, software used to have direct access to the hardware it ran on. If it needed to display something on the ...
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 ...
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 ...