-/* Copyright (C) 1991-1993,1997,1998,2000,2001 Free Software Foundation, Inc.
+/* Copyright (C) 1991-2017 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
- License along with the GNU C Library; if not, write to the Free
- Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
- 02111-1307 USA. */
+ License along with the GNU C Library; if not, see
+ <http://www.gnu.org/licenses/>. */
#include <errno.h>
#include <stdio.h>
#include <string.h>
#include <unistd.h>
#include <wchar.h>
-#ifdef USE_IN_LIBIO
-# include "libioP.h"
-#endif
+#include "libioP.h"
static void
-perror_internal (FILE *fp, const char *s)
+perror_internal (FILE *fp, const char *s, int errnum)
{
char buf[1024];
- int errnum = errno;
const char *colon;
const char *errstring;
errstring = __strerror_r (errnum, buf, sizeof buf);
-#ifdef USE_IN_LIBIO
- if (_IO_fwide (fp, 0) > 0)
- (void) __fwprintf (fp, L"%s%s%s\n", s, colon, errstring);
- else
-#endif
- (void) fprintf (fp, "%s%s%s\n", s, colon, errstring);
+ (void) __fxprintf (fp, "%s%s%s\n", s, colon, errstring);
}
void
perror (const char *s)
{
+ int errnum = errno;
FILE *fp;
int fd = -1;
+
/* The standard says that 'perror' must not change the orientation
of the stream. What is supposed to happen when the stream isn't
oriented yet? In this case we'll create a new stream which is
using the same underlying file descriptor. */
if (__builtin_expect (_IO_fwide (stderr, 0) != 0, 1)
- || fileno_unlocked (stderr) == -1
- || (fd = dup (fileno_unlocked (stderr))) == -1
+ || (fd = __fileno (stderr)) == -1
+ || (fd = __dup (fd)) == -1
|| (fp = fdopen (fd, "w+")) == NULL)
{
- if (__builtin_expect (fd != -1, 0))
- close (fd);
+ if (__glibc_unlikely (fd != -1))
+ __close (fd);
/* Use standard error as is. */
- perror_internal (stderr, s);
+ perror_internal (stderr, s, errnum);
}
else
{
/* We don't have to do any special hacks regarding the file
position. Since the stderr stream wasn't used so far we just
write to the descriptor. */
- perror_internal (fp, s);
+ perror_internal (fp, s, errnum);
+
+ if (_IO_ferror_unlocked (fp))
+ stderr->_flags |= _IO_ERR_SEEN;
+
/* Close the stream. */
fclose (fp);
-
- ((_IO_FILE *) stderr)->_offset = _IO_pos_BAD;
}
}
+libc_hidden_def (perror)