banan-os/libc/sys/stat.cpp

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#include <errno.h>
#include <fcntl.h>
#include <sys/stat.h>
#include <sys/syscall.h>
#include <unistd.h>
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int fstat(int fildes, struct stat* buf)
{
return syscall(SYS_FSTAT, fildes, buf);
}
int fstatat(int fd, const char* __restrict path, struct stat* __restrict buf, int flag)
{
if (flag & ~AT_SYMLINK_NOFOLLOW)
{
errno = EINVAL;
return -1;
}
int target = openat(fd, path, (flag & AT_SYMLINK_NOFOLLOW) ? O_NOFOLLOW : 0);
if (target == -1)
return -1;
int ret = fstat(target, buf);
close(target);
return ret;
}
int lstat(const char* __restrict path, struct stat* __restrict buf)
{
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int fd = open(path, O_SEARCH | O_NOFOLLOW);
if (fd == -1)
return -1;
int ret = fstat(fd, buf);
close(fd);
return ret;
}
int stat(const char* __restrict path, struct stat* __restrict buf)
{
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int fd = open(path, O_SEARCH);
if (fd == -1)
return -1;
int ret = fstat(fd, buf);
close(fd);
return ret;
}