improve exit status handling for program map code

[unix-history] / usr / src / contrib / sort / tmp.c

/*-
* Copyright (c) 1993
*      The Regents of the University of California.  All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* Peter McIlroy.
*
* %sccs.include.redist.c%
*/

#ifndef lint
static char sccsid[] = "@(#)tmp.c       8.1 (Berkeley) %G%";
#endif /* not lint */

#include <sys/param.h>

#include <err.h>
#include <errno.h>
#include <limits.h>
#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>

#include "pathnames.h"

#define _NAME_TMP "sort.XXXXXXXX"

FILE *
ftmp()
{
       static char *envtmp;
       sigset_t set, oset;
       static int first = 0;
       FILE *fd;
       char pathb[_POSIX_PATH_MAX], *path;

       path = pathb;
       if (!first && !envtmp) {
               envtmp = getenv("TMPDIR");
               first = 1;
       }
       if (envtmp)
               (void)snprintf(path,
                   sizeof(pathb), "%s/%s", envtmp, _NAME_TMP);
       else {
               memmove(path, _PATH_SORTTMP, sizeof(_PATH_SORTTMP));
       }
       sigfillset(&set);
       (void)sigprocmask(SIG_BLOCK, &set, &oset);
       path = mktemp(path);
       if (!path)
               err(2, "%s");
       if (!(fd = fopen(path, "w+")))
               err(2, "%s", path);
       (void)unlink(path);

       (void)sigprocmask(SIG_SETMASK, &oset, NULL);
       return (fd);
};