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(__atfct_seterrno): Correcty return EBADF for non-existing file descriptors.

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This commit is contained in:
Ulrich Drepper 2006-01-22 00:05:30 +00:00
parent c545373264
commit b2680b0331
1 changed files with 27 additions and 11 deletions
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38
sysdeps/unix/sysv/linux/openat.c
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@ -35,20 +35,36 @@ void
attribute_hidden
__atfct_seterrno (int errval, int fd, const char *buf)
{
if (buf != NULL && errval == ENOTDIR)
if (buf != NULL)
{
/* This can mean either the file descriptor is invalid or
/proc is not mounted. */
struct stat64 st;
if (__fxstat64 (_STAT_VER, fd, &st) != 0)
/* errno is already set correctly. */
return;
/* If /proc is not mounted there is nothing we can do. */
if (S_ISDIR (st.st_mode)
&& (__xstat64 (_STAT_VER, "/proc/self/fd", &st) != 0
|| !S_ISDIR (st.st_mode)))
errval = ENOSYS;
if (errval == ENOTDIR)
{
/* This can mean either the file descriptor is invalid or
/proc is not mounted. */
if (__fxstat64 (_STAT_VER, fd, &st) != 0)
/* errno is already set correctly. */
return;
/* If /proc is not mounted there is nothing we can do. */
if (S_ISDIR (st.st_mode)
&& (__xstat64 (_STAT_VER, "/proc/self/fd", &st) != 0
|| !S_ISDIR (st.st_mode)))
errval = ENOSYS;
}
else if (errval == ENOENT)
{
/* This could mean the file descriptor is not valid. We
reuse BUF for the stat call. Find the slash after the
file descriptor number. */
*(char *) strchr (buf + sizeof "/proc/self/fd", '/') = '\0';
int e = __xstat64 (_STAT_VER, buf, &st);
if ((e == -1 && errno == ENOENT)
||(e == 0 && !S_ISLNK (st.st_mode)))
errval = EBADF;
}
}
__set_errno (errval);