/* tempname.c - generate the name of a temporary file.
Copyright (C) 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999,
- 2000, 2001, 2002, 2003, 2005 Free Software Foundation, Inc.
+ 2000, 2001, 2002, 2003, 2005, 2006, 2007, 2009 Free Software Foundation,
+ Inc.
- This program is free software; you can redistribute it and/or modify
+ This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 2, or (at your option)
- any later version.
+ the Free Software Foundation; either version 3 of the License, or
+ (at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
- You should have received a copy of the GNU General Public License along
- with this program; if not, write to the Free Software Foundation,
- Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <http://www.gnu.org/licenses/>. */
-#if HAVE_CONFIG_H
+/* Extracted from glibc sysdeps/posix/tempname.c. See also tmpdir.c. */
+
+#if !_LIBC
# include <config.h>
+# include "tempname.h"
#endif
#include <sys/types.h>
#endif
#ifndef __GT_FILE
# define __GT_FILE 0
-# define __GT_BIGFILE 1
-# define __GT_DIR 2
-# define __GT_NOCREATE 3
+# define __GT_DIR 1
+# define __GT_NOCREATE 2
+#endif
+#if !_LIBC && (GT_FILE != __GT_FILE || GT_DIR != __GT_DIR \
+ || GT_NOCREATE != __GT_NOCREATE)
+# error report this to bug-gnulib@gnu.org
#endif
#include <stddef.h>
#include <stdlib.h>
#include <string.h>
-#if HAVE_FCNTL_H || _LIBC
-# include <fcntl.h>
-#endif
-
-#if HAVE_SYS_TIME_H || _LIBC
-# include <sys/time.h>
-#endif
-
-#if HAVE_STDINT_H || _LIBC
-# include <stdint.h>
-#endif
-#if HAVE_INTTYPES_H
-# include <inttypes.h>
-#endif
-
-#if HAVE_UNISTD_H || _LIBC
-# include <unistd.h>
-#endif
+#include <fcntl.h>
+#include <sys/time.h>
+#include <stdint.h>
+#include <unistd.h>
#include <sys/stat.h>
#if _LIBC
# define struct_stat64 struct stat64
#else
-# include "stat-macros.h"
# define struct_stat64 struct stat
+# define __gen_tempname gen_tempname
# define __getpid getpid
# define __gettimeofday gettimeofday
# define __mkdir mkdir
# define __open open
# define __open64 open
-# define __lxstat64(version, path, buf) lstat (path, buf)
-# define __xstat64(version, path, buf) stat (path, buf)
+# define __lxstat64(version, file, buf) lstat (file, buf)
+# define __xstat64(version, file, buf) stat (file, buf)
#endif
#if ! (HAVE___SECURE_GETENV || _LIBC)
# define uint64_t uintmax_t
#endif
+#if _LIBC
/* Return nonzero if DIR is an existent directory. */
static int
direxists (const char *dir)
sprintf (tmpl, "%.*s/%.*sXXXXXX", (int) dlen, dir, (int) plen, pfx);
return 0;
}
+#endif /* _LIBC */
-/* These are the characters used in temporary filenames. */
+/* These are the characters used in temporary file names. */
static const char letters[] =
"abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789";
/* Generate a temporary file name based on TMPL. TMPL must match the
- rules for mk[s]temp (i.e. end in "XXXXXX"). The name constructed
- does not exist at the time of the call to __gen_tempname. TMPL is
- overwritten with the result.
+ rules for mk[s]temp (i.e. end in "XXXXXX", possibly with a suffix).
+ The name constructed does not exist at the time of the call to
+ __gen_tempname. TMPL is overwritten with the result.
KIND may be one of:
__GT_NOCREATE: simply verify that the name does not exist
at the time of the call.
__GT_FILE: create the file using open(O_CREAT|O_EXCL)
and return a read-write fd. The file is mode 0600.
- __GT_BIGFILE: same as __GT_FILE but use open64().
__GT_DIR: create a directory, which will be mode 0700.
We use a clever algorithm to get hard-to-predict names. */
int
-__gen_tempname (char *tmpl, int kind)
+__gen_tempname (char *tmpl, int suffixlen, int flags, int kind)
{
int len;
char *XXXXXX;
necessary to try all these combinations. Instead if a reasonable
number of names is tried (we define reasonable as 62**3) fail to
give the system administrator the chance to remove the problems. */
- unsigned int attempts_min = 62 * 62 * 62;
+#define ATTEMPTS_MIN (62 * 62 * 62)
/* The number of times to attempt to generate a temporary file. To
conform to POSIX, this must be no smaller than TMP_MAX. */
- unsigned int attempts = attempts_min < TMP_MAX ? TMP_MAX : attempts_min;
+#if ATTEMPTS_MIN < TMP_MAX
+ unsigned int attempts = TMP_MAX;
+#else
+ unsigned int attempts = ATTEMPTS_MIN;
+#endif
len = strlen (tmpl);
- if (len < 6 || strcmp (&tmpl[len - 6], "XXXXXX"))
+ if (len < 6 + suffixlen || memcmp (&tmpl[len - 6 - suffixlen], "XXXXXX", 6))
{
__set_errno (EINVAL);
return -1;
}
/* This is where the Xs start. */
- XXXXXX = &tmpl[len - 6];
+ XXXXXX = &tmpl[len - 6 - suffixlen];
/* Get some more or less random data. */
#ifdef RANDOM_BITS
RANDOM_BITS (random_time_bits);
#else
-# if HAVE_GETTIMEOFDAY || _LIBC
{
struct timeval tv;
__gettimeofday (&tv, NULL);
random_time_bits = ((uint64_t) tv.tv_usec << 16) ^ tv.tv_sec;
}
-# else
- random_time_bits = time (NULL);
-# endif
#endif
value += random_time_bits ^ __getpid ();
switch (kind)
{
case __GT_FILE:
- fd = __open (tmpl, O_RDWR | O_CREAT | O_EXCL, S_IRUSR | S_IWUSR);
- break;
-
- case __GT_BIGFILE:
- fd = __open64 (tmpl, O_RDWR | O_CREAT | O_EXCL, S_IRUSR | S_IWUSR);
+ fd = __open (tmpl,
+ (flags & ~O_ACCMODE)
+ | O_RDWR | O_CREAT | O_EXCL, S_IRUSR | S_IWUSR);
break;
case __GT_DIR:
default:
assert (! "invalid KIND in __gen_tempname");
+ abort ();
}
if (fd >= 0)
projects / pspp / blobdiff