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LibC: Add POSIX spec comments for stat APIs

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This commit is contained in:
Brian Gianforcaro 2021-12-21 16:00:08 -08:00 • committed by Brian Gianforcaro
parent 890fba95f7
commit 1fdd1915c2
1 changed files with 9 additions and 0 deletions
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9
Userland/Libraries/LibC/stat.cpp
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@ -15,11 +15,13 @@
extern "C" {
// https://pubs.opengroup.org/onlinepubs/9699919799/functions/umask.html
mode_t umask(mode_t mask)
{
return syscall(SC_umask, mask);
}
// https://pubs.opengroup.org/onlinepubs/9699919799/functions/mkdir.html
int mkdir(const char* pathname, mode_t mode)
{
if (!pathname) {
@ -30,6 +32,7 @@ int mkdir(const char* pathname, mode_t mode)
__RETURN_WITH_ERRNO(rc, rc, -1);
}
// https://pubs.opengroup.org/onlinepubs/9699919799/functions/chmod.html
int chmod(const char* pathname, mode_t mode)
{
if (!pathname) {
@ -40,12 +43,14 @@ int chmod(const char* pathname, mode_t mode)
__RETURN_WITH_ERRNO(rc, rc, -1);
}
// https://pubs.opengroup.org/onlinepubs/9699919799/functions/fchmod.html
int fchmod(int fd, mode_t mode)
{
int rc = syscall(SC_fchmod, fd, mode);
__RETURN_WITH_ERRNO(rc, rc, -1);
}
// https://pubs.opengroup.org/onlinepubs/9699919799/functions/mkfifo.html
int mkfifo(const char* pathname, mode_t mode)
{
return mknod(pathname, mode | S_IFIFO, 0);
@ -62,22 +67,26 @@ static int do_stat(int dirfd, const char* path, struct stat* statbuf, bool follo
__RETURN_WITH_ERRNO(rc, rc, -1);
}
// https://pubs.opengroup.org/onlinepubs/9699919799/functions/lstat.html
int lstat(const char* path, struct stat* statbuf)
{
return do_stat(AT_FDCWD, path, statbuf, false);
}
// https://pubs.opengroup.org/onlinepubs/9699919799/functions/stat.html
int stat(const char* path, struct stat* statbuf)
{
return do_stat(AT_FDCWD, path, statbuf, true);
}
// https://pubs.opengroup.org/onlinepubs/9699919799/functions/fstat.html
int fstat(int fd, struct stat* statbuf)
{
int rc = syscall(SC_fstat, fd, statbuf);
__RETURN_WITH_ERRNO(rc, rc, -1);
}
// https://pubs.opengroup.org/onlinepubs/9699919799/functions/fstatat.html
int fstatat(int fd, const char* path, struct stat* statbuf, int flags)
{
return do_stat(fd, path, statbuf, !(flags & AT_SYMLINK_NOFOLLOW));