*** jmemname.c	Fri Jul 24 23:06:50 1992
--- jmemsys.c	Thu Jun 10 01:06:08 1993
***************
*** 82,87 ****
--- 82,98 ----
  
  static int next_file_num;       /* to distinguish among several temp files */
  
+ LOCAL char *
+ get_temp_dir (void)
+ {
+     char * env;
+ 
+     env = getenv("JPEGTMP");
+     if (env)
+         return env;
+     return TEMP_DIRECTORY;
+ }
+ 
  #ifdef NO_MKTEMP
  
  #ifndef TEMP_FILE_NAME          /* so can override from Makefile */
***************
*** 96,102 ****
    /* Keep generating file names till we find one that's not in use */
    for (;;) {
      next_file_num++;		/* advance counter */
!     sprintf(fname, TEMP_FILE_NAME, TEMP_DIRECTORY, next_file_num);
      if ((tfile = fopen(fname, READ_BINARY)) == NULL)
        break;
      fclose(tfile);		/* oops, it's there; close tfile & try again */
--- 107,113 ----
    /* Keep generating file names till we find one that's not in use */
    for (;;) {
      next_file_num++;            /* advance counter */
!     sprintf(fname, TEMP_FILE_NAME, get_temp_dir(), next_file_num);
      if ((tfile = fopen(fname, READ_BINARY)) == NULL)
        break;
      fclose(tfile);              /* oops, it's there; close tfile & try again */
***************
*** 114,120 ****
  select_file_name (char * fname)
  {
    next_file_num++;		/* advance counter */
!   sprintf(fname, TEMP_FILE_NAME, TEMP_DIRECTORY, next_file_num);
    mktemp(fname);		/* make sure file name is unique */
    /* mktemp replaces the trailing XXXXXX with a unique string of characters */
  }
--- 125,131 ----
  select_file_name (char * fname)
  {
    next_file_num++;              /* advance counter */
!   sprintf(fname, TEMP_FILE_NAME, get_temp_dir(), next_file_num);
    mktemp(fname);                /* make sure file name is unique */
    /* mktemp replaces the trailing XXXXXX with a unique string of characters */
  }