9dd887f1a6
Fixed macros for temporarily relinquishing and restoring setuid/setgid privileges so that they never change the real user and group IDs of the calling process. The setre[ug]id() calls are still used in the REDUCE_PERM macro (with the r[ug]id arguments of -1) so that the call changes the saved user and group IDs of the process to that specified. Also, the panic() and perr() functions had insufficient privileges to delete the problematic file under /var/at.
91 lines
2.3 KiB
C
91 lines
2.3 KiB
C
/*
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* panic.c - terminate fast in case of error
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* Copyright (C) 1993 Thomas Koenig
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. The name of the author(s) may not be used to endorse or promote
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* products derived from this software without specific prior written
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* permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR(S) ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR(S) BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef lint
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static const char rcsid[] =
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"$FreeBSD$";
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#endif /* not lint */
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/* System Headers */
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#include <err.h>
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#include <errno.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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/* Local headers */
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#include "panic.h"
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#include "privs.h"
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#include "at.h"
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/* External variables */
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/* Global functions */
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void
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panic(char *a)
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{
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/* Something fatal has happened, print error message and exit.
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*/
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if (fcreated) {
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PRIV_START
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unlink(atfile);
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PRIV_END
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}
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errx(EXIT_FAILURE, "%s", a);
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}
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void
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perr(char *a)
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{
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/* Some operating system error; print error message and exit.
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*/
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int serrno = errno;
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if (fcreated) {
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PRIV_START
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unlink(atfile);
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PRIV_END
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}
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errno = serrno;
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err(EXIT_FAILURE, "%s", a);
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}
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void
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usage(void)
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{
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/* Print usage and exit. */
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fprintf(stderr, "usage: at [-V] [-q x] [-f file] [-m] time\n"
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" at [-V] -c job [job ...]\n"
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" atq [-V] [-q x] [-v]\n"
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" atrm [-V] job [job ...]\n"
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" batch [-V] [-f file] [-m]\n");
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exit(EXIT_FAILURE);
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}
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