src/temp/mktemp.c

   1 #define _GNU_SOURCE
   2 #include <string.h>
   3 #include <stdlib.h>
   4 #include <errno.h>
   5 #include <sys/stat.h>
   6
   7 char *mktemp(char *template)
   8 {
   9         size_t l = strlen(template);
  10         int retries = 100;
  11         struct stat st;
  12
  13         if (l < 6 || memcmp(template+l-6, "XXXXXX", 6)) {
  14                 errno = EINVAL;
  15                 *template = 0;
  16                 return template;
  17         }
  18
  19         do {
  20                 __randname(template+l-6);
  21                 if (stat(template, &st)) {
  22                         if (errno != ENOENT) *template = 0;
  23                         return template;
  24                 }
  25         } while (--retries);
  26
  27         *template = 0;
  28         errno = EEXIST;
  29         return template;
  30 }