m4/mkstemp.m4

   1 #serial 1
   2
   3 # On some systems (e.g., HPUX-10.20, SunOS4.1.4, solaris2.5.1), mkstemp has the
   4 # silly limit that it can create no more than 26 files from a given template.
   5 # Other systems lack mkstemp altogether.  On either type of system, arrange
   6 # to use the replacement function.
   7 AC_DEFUN([UTILS_FUNC_MKSTEMP],
   8 [dnl
   9   AC_REPLACE_FUNCS(mkstemp)
  10   if test $ac_cv_func_mkstemp = no; then
  11     utils_cv_func_mkstemp_limitations=yes
  12   else
  13     AC_CACHE_CHECK([for mkstemp limitations],
  14       utils_cv_func_mkstemp_limitations,
  15       [
  16         AC_TRY_RUN([
  17 #         include <stdlib.h>
  18           int main ()
  19           {
  20             int i;
  21             for (i = 0; i < 30; i++)
  22               {
  23                 char template[] = "conftestXXXXXX";
  24                 int fd = mkstemp (template);
  25                 if (fd == -1)
  26                   exit (1);
  27                 close (fd);
  28               }
  29             exit (0);
  30           }
  31           ],
  32         utils_cv_func_mkstemp_limitations=no,
  33         utils_cv_func_mkstemp_limitations=yes,
  34         utils_cv_func_mkstemp_limitations=yes
  35         )
  36       ]
  37     )
  38   fi
  39
  40   if test $utils_cv_func_mkstemp_limitations = yes; then
  41     AC_LIBOBJ(mkstemp)
  42     AC_LIBOBJ(tempname)
  43     AC_DEFINE(mkstemp, rpl_mkstemp,
  44       [Define to rpl_mkstemp if the replacement function should be used.])
  45   fi
  46 ])