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/*
* Amanda, The Advanced Maryland Automatic Network Disk Archiver
* Copyright (c) 1991-1998 University of Maryland at College Park
* Copyright (c) 2007-2012 Zmanda, Inc. All Rights Reserved.
* Copyright (c) 2013-2016 Carbonite, Inc. All Rights Reserved.
* All Rights Reserved.
*
* Permission to use, copy, modify, distribute, and sell this software and its
* documentation for any purpose is hereby granted without fee, provided that
* the above copyright notice appear in all copies and that both that
* copyright notice and this permission notice appear in supporting
* documentation, and that the name of U.M. not be used in advertising or
* publicity pertaining to distribution of the software without specific,
* written prior permission. U.M. makes no representations about the
* suitability of this software for any purpose. It is provided "as is"
* without express or implied warranty.
*
* U.M. DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL U.M.
* BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
* OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
* CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*
* Authors: the Amanda Development Team. Its members are listed in a
* file named AUTHORS, in the root directory of this distribution.
*/
/*
* $Id: killpgrp.c,v 1.17 2006/07/25 18:27:56 martinea Exp $
*
* if it is the process group leader, it kills all processes in its
* process group when it is killed itself.
*
* argv[0] is the killpgrp program name
* argv[1] is the config name or NOCONFIG
*
*/
#include "amanda.h"
#include "amutil.h"
#include "conffile.h"
#ifdef HAVE_GETPGRP
#ifdef GETPGRP_VOID
#define AM_GETPGRP() getpgrp()
#else
#define AM_GETPGRP() getpgrp(getpid())
#endif
#else
/* we cannot check it, so let us assume it is ok */
#define AM_GETPGRP() getpid()
#endif
int main(int argc, char **argv);
static void term_kill_soft(int sig);
static void term_kill_hard(int sig);
int
main(
int argc,
char ** argv)
{
int ch;
char *exitstr;
amwait_t status;
glib_init();
if (argc > 1 && argv[1] && g_str_equal(argv[1], "--version")) {
printf("killpgrp-%s\n", VERSION);
return (0);
}
/*
* Configure program for internationalization:
* 1) Only set the message locale for now.
* 2) Set textdomain for all amanda related programs to "amanda"
* We don't want to be forced to support dozens of message catalogs.
*/
setlocale(LC_MESSAGES, "C");
textdomain("amanda");
safe_fd(-1, 0);
safe_cd();
set_pname("killpgrp");
dbopen(DBG_SUBDIR_CLIENT);
config_init(CONFIG_INIT_CLIENT|CONFIG_INIT_GLOBAL, NULL);
if (argc < 2) {
error("Need at least 2 arguments\n");
/*NOTREACHED*/
}
dbprintf(_("version %s\n"), VERSION);
dbprintf(_("config: %s\n"), argv[1]);
if (!g_str_equal(argv[1], "NOCONFIG"))
dbrename(argv[1], DBG_SUBDIR_CLIENT);
#ifdef WANT_SETUID_CLIENT
check_running_as(RUNNING_AS_CLIENT_LOGIN | RUNNING_AS_UID_ONLY);
if (!become_root()) {
error(_("error [%s could not become root (is the setuid bit set?)]\n"), get_pname());
/*NOTREACHED*/
}
#else
check_running_as(RUNNING_AS_CLIENT_LOGIN);
#endif
if (AM_GETPGRP() != getpid()) {
error(_("error [must be the process group leader]"));
/*NOTREACHED*/
}
signal(SIGTERM, term_kill_soft);
/* Consume any extranious input */
do {
ch = getchar();
/* wait until EOF */
} while (ch != EOF);
term_kill_soft(0);
for(;;) {
if (wait(&status) != -1)
break;
if (errno != EINTR) {
error(_("error [wait() failed: %s]"), strerror(errno));
/*NOTREACHED*/
}
}
exitstr = str_exit_status("child", status);
dbprintf("%s\n", exitstr);
amfree(exitstr);
/*@ignore@*/
return WIFEXITED(status)?WEXITSTATUS(status):1;
/*@end@*/
}
static void term_kill_soft(
int sig)
{
pid_t dumppid = getpid();
int killerr;
(void)sig; /* Quiet unused parameter warning */
signal(SIGTERM, SIG_IGN);
signal(SIGALRM, term_kill_hard);
alarm(3);
/*
* First, try to kill the dump process nicely. If it ignores us
* for three seconds, hit it harder.
*/
dbprintf(_("sending SIGTERM to process group %ld\n"), (long) dumppid);
killerr = kill(-dumppid, SIGTERM);
if (killerr == -1) {
dbprintf(_("kill failed: %s\n"), strerror(errno));
}
}
static void term_kill_hard(
int sig)
{
pid_t dumppid = getpid();
int killerr;
(void)sig; /* Quiet unused parameter warning */
dbprintf(_("It won\'t die with SIGTERM, but SIGKILL should do.\n"));
dbprintf(_("Don't expect any further output, this will be suicide.\n"));
killerr = kill(-dumppid, SIGKILL);
/* should never reach this point, but so what? */
if (killerr == -1) {
dbprintf(_("kill failed: %s\n"), strerror(errno));
dbprintf(_("waiting until child terminates\n"));
}
}
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