TIOCGPGRP copies an int out of the kernel

[unix-history] / usr / src / lib / libc / stdio / tmpfile.c

/*-
* Copyright (c) 1990 The Regents of the University of California.
* All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* Chris Torek.
*
* %sccs.include.redist.c%
*/

#if defined(LIBC_SCCS) && !defined(lint)
static char sccsid[] = "@(#)tmpfile.c   5.3 (Berkeley) %G%";
#endif /* LIBC_SCCS and not lint */

#include <sys/types.h>
#include <signal.h>
#include <unistd.h>
#include <errno.h>
#include <stdio.h>
#include <paths.h>

FILE *
tmpfile()
{
       sigset_t set, oset;
       FILE *fp;
       int fd, sverrno;
#define TRAILER "tmp.XXXXXX"
       char buf[sizeof(_PATH_TMP) + sizeof(TRAILER)];

       bcopy(_PATH_TMP, buf, sizeof(_PATH_TMP) - 1);
       bcopy(TRAILER, buf + sizeof(_PATH_TMP) - 1, sizeof(TRAILER));

       sigemptyset(&set);
       sigaddset(&set, SIGHUP);
       sigaddset(&set, SIGINT);
       sigaddset(&set, SIGQUIT);
       sigaddset(&set, SIGTERM);
       (void)sigprocmask(SIG_BLOCK, &set, &oset);

       fd = mkstemp(buf);
       if (fd != -1)
               (void)unlink(buf);

       (void)sigprocmask(SIG_SETMASK, &oset, (sigset_t *)NULL);

       if (fd == -1)
               return(NULL);

       if (!(fp = fdopen(fd, "w+"))) {
               sverrno = errno;
               (void)close(fd);
               errno = sverrno;
               return(NULL);
       }
       return(fp);
}