/* 

 *  panic.c - terminate fast in case of error

 *  Copyright (C) 1993  Thomas Koenig

 *

 *  This program is free software; you can redistribute it and/or modify

 *  it under the terms of the GNU General Public License as published by

 *  the Free Software Foundation; either version 2 of the License, or

 *  (at your option) any later version.

 *

 *  This program is distributed in the hope that it will be useful,

 *  but WITHOUT ANY WARRANTY; without even the implied warranty of

 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

 *  GNU General Public License for more details.

 *

 *  You should have received a copy of the GNU General Public License

 *  along with this program; if not, write to the Free Software

 *  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA

 */

#ifdef HAVE_CONFIG_H

#include "config.h"

#endif

/* System Headers */

#ifdef HAVE_ERRNO_H

#include <errno.h>

#endif

#include <stdio.h>

#include <stdlib.h>

#ifdef HAVE_UNISTD_H

#include <unistd.h>

#endif

#ifdef HAVE_STDARG_H

#include <stdarg.h>

#endif

/* Local headers */

#include "panic.h"

#include "privs.h"

#include "at.h"

/* File scope variables */

/* External variables */

/* Global functions */

void

panic(char *a)

{

/* Something fatal has happened, print error message and exit.

 */

    fprintf(stderr, "%s: %s\n", namep, a);

    if (fcreated) {

	setregid(real_gid, effective_gid);

	unlink(atfile);

	setregid(effective_gid, real_gid);

    }

    exit(EXIT_FAILURE);

}

void

perr(const char *fmt,...)

{

/* Some operating system error; print error message and exit.

 */

    char buf[1024];

    va_list args;

    va_start(args, fmt);

    vsnprintf(buf, sizeof(buf), fmt, args);

    va_end(args);

    perror(buf);

    if (fcreated) {

        setregid(real_gid, effective_gid);

	unlink(atfile);

        setregid(effective_gid, real_gid);

    }

    exit(EXIT_FAILURE);

}

void

usage(void)

{

/* Print usage and exit.

 */

    fprintf(stderr, "Usage: at [-V] [-q x] [-f file] [-mMlbv] timespec ...\n"

            "       at [-V] [-q x] [-f file] [-mMlbv] -t time\n"

    	    "       at -c job ...\n"

	    "       atq [-V] [-q x]\n"

	    "       at [ -rd ] job ...\n"

	    "       atrm [-V] job ...\n"

	    "       batch\n");

    exit(EXIT_FAILURE);

}