您可以使用strace
查看 linux coreutils 使用的系统调用。系统调用也有man
页面,您可以查找这些页面(例如man unlink
)。
例如...
jason@io /tmp $ strace rm foo
execve("/bin/rm", ["rm", "foo"], [/* 66 vars */]) = 0
brk(0) = 0x20dd000
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f2a46c76000
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=135313, ...}) = 0
mmap(NULL, 135313, PROT_READ, MAP_PRIVATE, 3, 0) = 0x7f2a46c54000
close(3) = 0
open("/lib64/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\0\300\370\1\0\0\0\0\0"..., 832) = 832
fstat(3, {st_mode=S_IFREG|0755, st_size=1677176, ...}) = 0
mmap(NULL, 3784472, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7f2a466ba000
mprotect(0x7f2a4684d000, 2093056, PROT_NONE) = 0
mmap(0x7f2a46a4c000, 24576, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x192000) = 0x7f2a46a4c000
mmap(0x7f2a46a52000, 16152, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x7f2a46a52000
close(3) = 0
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f2a46c53000
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f2a46c52000
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f2a46c51000
arch_prctl(ARCH_SET_FS, 0x7f2a46c52700) = 0
mprotect(0x7f2a46a4c000, 16384, PROT_READ) = 0
mprotect(0x7f2a46c77000, 4096, PROT_READ) = 0
munmap(0x7f2a46c54000, 135313) = 0
brk(0) = 0x20dd000
brk(0x20fe000) = 0x20fe000
open("/usr/lib64/locale/locale-archive", O_RDONLY|O_CLOEXEC) = 3
fstat(3, {st_mode=S_IFREG|0644, st_size=1607712, ...}) = 0
mmap(NULL, 1607712, PROT_READ, MAP_PRIVATE, 3, 0) = 0x7f2a46ac8000
close(3) = 0
ioctl(0, TCGETS, {B38400 opost isig icanon echo ...}) = 0
newfstatat(AT_FDCWD, "foo", {st_mode=S_IFREG|0644, st_size=0, ...}, AT_SYMLINK_NOFOLLOW) = 0
geteuid() = 1000
newfstatat(AT_FDCWD, "foo", {st_mode=S_IFREG|0644, st_size=0, ...}, AT_SYMLINK_NOFOLLOW) = 0
faccessat(AT_FDCWD, "foo", W_OK) = 0
unlinkat(AT_FDCWD, "foo", 0) = 0
lseek(0, 0, SEEK_CUR) = -1 ESPIPE (Illegal seek)
close(0) = 0
close(1) = 0
close(2) = 0
exit_group(0) = ?
+++ exited with 0 +++