summaryrefslogtreecommitdiffstats
path: root/contrib/stdlib/gf_mkostemp.c
diff options
context:
space:
mode:
Diffstat (limited to 'contrib/stdlib/gf_mkostemp.c')
-rw-r--r--contrib/stdlib/gf_mkostemp.c107
1 files changed, 0 insertions, 107 deletions
diff --git a/contrib/stdlib/gf_mkostemp.c b/contrib/stdlib/gf_mkostemp.c
deleted file mode 100644
index 931249a4520..00000000000
--- a/contrib/stdlib/gf_mkostemp.c
+++ /dev/null
@@ -1,107 +0,0 @@
-/* Borrowed from glibc-2.16/sysdeps/posix/tempname.c */
-
-/* Copyright (C) 1991-2001, 2006, 2007, 2009 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
- modify it under the terms of the GNU Lesser General Public
- License as published by the Free Software Foundation; either
- version 2.1 of the License, or (at your option) any later version.
-
- The GNU C Library 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
- 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, see
- <http://www.gnu.org/licenses/>. */
-
-#include <stdlib.h>
-#include <string.h>
-#include <sys/stat.h>
-#include <unistd.h>
-#include <errno.h>
-#include <sys/time.h>
-#include <fcntl.h>
-#include <sys/types.h>
-#include <time.h>
-#include <inttypes.h>
-
-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", possibly with a suffix).
-*/
-
-#if !defined(TMP_MAX)
-#define TMP_MAX 238328
-#endif
-
-int
-gf_mkostemp (char *tmpl, int suffixlen, int flags)
-{
- int len;
- char *XXXXXX;
- static uint64_t value;
- uint64_t random_time_bits;
- unsigned int count;
- int fd = -1;
-
- /* A lower bound on the number of temporary files to attempt to
- generate. The maximum total number of temporary file names that
- can exist for a given template is 62**6. It should never be
- 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 = TMP_MAX; /* TMP_MAX == 62³ */
-
- len = strlen (tmpl);
- if (len < 6 + suffixlen || memcmp (&tmpl[len - 6 - suffixlen],
- "XXXXXX", 6))
- return -1;
-
- /* This is where the Xs start. */
- XXXXXX = &tmpl[len - 6 - suffixlen];
-
- /* Get some more or less random data. */
-# if HAVE_GETTIMEOFDAY
- 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
-
- value += random_time_bits ^ getpid ();
-
- for (count = 0; count < attempts; value += 7777, ++count) {
- uint64_t v = value;
-
- /* Fill in the random bits. */
- XXXXXX[0] = letters[v % 62];
- v /= 62;
- XXXXXX[1] = letters[v % 62];
- v /= 62;
- XXXXXX[2] = letters[v % 62];
- v /= 62;
- XXXXXX[3] = letters[v % 62];
- v /= 62;
- XXXXXX[4] = letters[v % 62];
- v /= 62;
- XXXXXX[5] = letters[v % 62];
-
- fd = open (tmpl, (flags & ~O_ACCMODE)
- | O_RDWR | O_CREAT | O_EXCL, S_IRUSR | S_IWUSR);
-
- if (fd >= 0)
- return fd;
- else if (errno != EEXIST)
- return -1;
- }
-
- /* We got out of the loop because we ran out of combinations to try. */
- return -1;
-}