diff options
Diffstat (limited to 'contrib/stdlib/gf_mkostemp.c')
| -rw-r--r-- | contrib/stdlib/gf_mkostemp.c | 107 | 
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; -}  | 
