int
__real_chown (const char *file, uid_t owner, gid_t group)
{
#if __ASSUME_32BITUIDS > 0
return INLINE_SYSCALL (chown32, 3, CHECK_STRING (file), owner, group);
#else
static int __libc_old_chown;
int result;
if (!__libc_old_chown)
{
int saved_errno = errno;
# ifdef __NR_chown32
if (__libc_missing_32bit_uids <= 0)
{
int result;
int saved_errno = errno;
result = INLINE_SYSCALL (chown32, 3, CHECK_STRING (file), owner, group);
if (result == 0 || errno != ENOSYS)
return result;
__set_errno (saved_errno);
__libc_missing_32bit_uids = 1;
}
# endif /* __NR_chown32 */
if (((owner + 1) > (uid_t) ((__kernel_uid_t) -1U))
|| ((group + 1) > (gid_t) ((__kernel_gid_t) -1U)))
{
__set_errno (EINVAL);
return -1;
}
result = INLINE_SYSCALL (chown, 3, CHECK_STRING (file), owner, group);
if (result >= 0 || errno != ENOSYS)
return result;
__set_errno (saved_errno);
__libc_old_chown = 1;
}
return __lchown (file, owner, group);
#endif
}
/* Compiling for compatibiity. */
int
attribute_compat_text_section
__chown_is_lchown (const char *file, uid_t owner, gid_t group)
{
return __lchown (file, owner, group);
}
int
lchown(const char *path, uid_t owner, gid_t group)
{
_gfs_hook_debug_v(fputs("Hooking lchown\n", stderr));
return (__lchown(path, owner, group));
}
int
fchownat (int fd, const char *file, uid_t owner, gid_t group, int flag)
{
int result;
#ifdef __NR_fchownat
# ifndef __ASSUME_ATFCTS
if (__have_atfcts >= 0)
# endif
{
result = INLINE_SYSCALL (fchownat, 5, fd, file, owner, group, flag);
# ifndef __ASSUME_ATFCTS
if (result == -1 && errno == ENOSYS)
__have_atfcts = -1;
else
# endif
return result;
}
#endif
#ifndef __ASSUME_ATFCTS
if (flag & ~AT_SYMLINK_NOFOLLOW)
{
__set_errno (EINVAL);
return -1;
}
char *buf = NULL;
if (fd != AT_FDCWD && file[0] != '/')
{
size_t filelen = strlen (file);
static const char procfd[] = "/proc/self/fd/%d/%s";
/* Buffer for the path name we are going to use. It consists of
- the string /proc/self/fd/
- the file descriptor number
- the file name provided.
The final NUL is included in the sizeof. A bit of overhead
due to the format elements compensates for possible negative
numbers. */
size_t buflen = sizeof (procfd) + sizeof (int) * 3 + filelen;
buf = alloca (buflen);
__snprintf (buf, buflen, procfd, fd, file);
file = buf;
}
# if __ASSUME_LCHOWN_SYSCALL
INTERNAL_SYSCALL_DECL (err);
if (flag & AT_SYMLINK_NOFOLLOW)
result = INTERNAL_SYSCALL (lchown, err, 3, file, owner, group);
else
result = INTERNAL_SYSCALL (chown, err, 3, file, owner, group);
if (__builtin_expect (INTERNAL_SYSCALL_ERROR_P (result, err), 0))
{
__atfct_seterrno (INTERNAL_SYSCALL_ERRNO (result, err), fd, buf);
return -1;
}
# else
/* Don't inline the rest to avoid unnecessary code duplication. */
if (flag & AT_SYMLINK_NOFOLLOW)
result = __lchown (file, owner, group);
else
result = __chown (file, owner, group);
if (result < 0)
__atfct_seterrno (errno, fd, buf);
# endif
return result;
#endif
}
/* Compiling for compatibiity. */
int
__chown_is_lchown (const char *file, uid_t owner, gid_t group)
{
return __lchown (file, owner, group);
}
