lib/stdio/tmpfile.c

   1 /*
   2  * tmpfile.c - create and open a temporary file
   3  */
   4 /* $Header$ */
   5
   6 #if     defined(_POSIX_SOURCE)
   7 #include        <sys/types.h>
   8 #endif
   9 #include        <stdio.h>
  10 #include        <string.h>
  11 #include        "loc_incl.h"
  12
  13 pid_t _getpid(void);
  14
  15 FILE *
  16 tmpfile(void) {
  17         static char name_buffer[L_tmpnam] = "/tmp/tmp." ;
  18         static char *name = NULL;
  19         FILE *file;
  20
  21         if (!name) {
  22                 name = name_buffer + strlen(name_buffer);
  23                 name = _i_compute(_getpid(), 10, name, 5);
  24                 *name = '\0';
  25         }
  26
  27         file = fopen(name_buffer,"wb+");
  28         if (!file) return (FILE *)NULL;
  29         (void) remove(name_buffer);
  30         return file;
  31 }