source4/heimdal_build/replace.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3
   4    some replacement functions for parts of roken that don't fit easily into
   5    our build system
   6
   7    Copyright (C) Andrew Tridgell 2005
   8
   9    This program is free software; you can redistribute it and/or modify
  10    it under the terms of the GNU General Public License as published by
  11    the Free Software Foundation; either version 3 of the License, or
  12    (at your option) any later version.
  13
  14    This program is distributed in the hope that it will be useful,
  15    but WITHOUT ANY WARRANTY; without even the implied warranty of
  16    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17    GNU General Public License for more details.
  18
  19    You should have received a copy of the GNU General Public License
  20    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  21 */
  22
  23 #include "config.h"
  24 #include <stdio.h>
  25 #include <unistd.h>
  26 #include <fcntl.h>
  27 #include "err.h"
  28 #include "roken.h"
  29
  30 #ifndef HAVE_ERR
  31  void err(int eval, const char *format, ...)
  32 {
  33         va_list ap;
  34         va_start(ap, format);
  35         vfprintf(stderr, format, ap);
  36         perror("");
  37         va_end(ap);
  38         exit(eval);
  39 }
  40 #endif
  41
  42 #ifndef HAVE_ERRX
  43  void errx(int eval, const char *format, ...)
  44 {
  45         va_list ap;
  46         va_start(ap, format);
  47         vfprintf(stderr, format, ap);
  48         va_end(ap);
  49         exit(eval);
  50 }
  51 #endif
  52
  53 #ifndef HAVE_WARNX
  54  void warnx(const char *format, ...)
  55 {
  56         va_list ap;
  57         va_start(ap, format);
  58         vfprintf(stderr, format, ap);
  59         va_end(ap);
  60 }
  61 #endif
  62
  63 #ifndef HAVE_FLOCK
  64  int flock(int fd, int op)
  65 {
  66         struct flock lock;
  67         lock.l_whence = 0;
  68         lock.l_start = 0;
  69         lock.l_len = 0;
  70         lock.l_pid = 0;
  71
  72         switch (op & (LOCK_UN|LOCK_SH|LOCK_EX)) {
  73         case LOCK_UN:
  74                 lock.l_type = F_UNLCK;
  75                 return fcntl(fd, F_SETLK, &lock);
  76         case LOCK_SH:
  77                 lock.l_type = F_RDLCK;
  78                 return fcntl(fd, (op&LOCK_NB)?F_SETLK:F_SETLKW, &lock);
  79         case LOCK_EX:
  80                 lock.l_type = F_WRLCK;
  81                 return fcntl(fd, (op&LOCK_NB)?F_SETLK:F_SETLKW, &lock);
  82         }
  83         errno = EINVAL;
  84         return -1;
  85 }
  86 #endif