270 lines
6.9 KiB
C
270 lines
6.9 KiB
C
/*
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* Copyright (c) 1988, 1993, 1994
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* The Regents of the University of California. All rights reserved.
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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. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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/*
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* oct 5 1994 -- almost entirely re-written to allow for process names.
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* modifications (c) salvatore valente <svalente@mit.edu>
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* may be used / modified / distributed under the same terms as the original.
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <ctype.h>
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#include <unistd.h>
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#include <signal.h>
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#ifdef __linux__
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/*
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* sys_signame -- an ordered list of signals.
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* lifted from /usr/include/linux/signal.h
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* this particular order is only correct for linux.
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* this is _not_ portable.
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*/
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char *sys_signame[NSIG] = {
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"zero", "HUP", "INT", "QUIT", "ILL", "TRAP", "IOT", "UNUSED",
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"FPE", "KILL", "USR1", "SEGV", "USR2", "PIPE", "ALRM", "TERM",
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"STKFLT","CHLD", "CONT", "STOP", "TSTP", "TTIN", "TTOU", "IO",
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"XCPU", "XFSZ", "VTALRM","PROF", "WINCH", NULL
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};
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#endif
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int main (int argc, char *argv[]);
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extern char *mybasename(char *);
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int signame_to_signum (char *sig);
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int arg_to_signum (char *arg);
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void nosig (char *name);
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void printsig (int sig);
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void printsignals (FILE *fp);
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int usage (int status);
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int kill_verbose (char *procname, int pid, int sig);
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extern int *get_pids (char *, int);
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char version_string[] = "kill v2.0\n";
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char *whoami;
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int main (int argc, char *argv[])
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{
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int errors, numsig, pid;
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char *ep, *arg;
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int do_pid, do_kill, check_all;
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int *pids, *ip;
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whoami = mybasename (*argv);
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numsig = SIGTERM;
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do_pid = (! strcmp (whoami, "pid"));
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do_kill = 0;
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check_all = 0;
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/* loop through the arguments.
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actually, -a is the only option can be used with other options.
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`kill' is basically a one-option-at-most program. */
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for (argc--, argv++; argc > 0; argc--, argv++) {
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arg = *argv;
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if (*arg != '-') {
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break;
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}
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if (! strcmp (arg, "-u")) {
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return usage (0);
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}
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if (! strcmp (arg, "-v")) {
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fputs (version_string, stdout);
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return 0;
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}
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if (! strcmp (arg, "-a")) {
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check_all++;
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continue;
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}
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if (! strcmp (arg, "-l")) {
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if (argc < 2) {
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printsignals (stdout);
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return 0;
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}
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if (argc > 2) {
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return usage (1);
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}
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/* argc == 2 */
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arg = argv[1];
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if ((numsig = arg_to_signum (arg)) < 0) {
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fprintf (stderr, "%s: unknown signal %s\n", whoami, arg);
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return 1;
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}
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printsig (numsig);
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return 0;
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}
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if (! strcmp (arg, "-p")) {
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do_pid++;
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if (do_kill)
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return usage (1);
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continue;
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}
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if (! strcmp (arg, "-s")) {
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if (argc < 2) {
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return usage (1);
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}
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do_kill++;
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if (do_pid)
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return usage (1);
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argc--, argv++;
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arg = *argv;
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if ((numsig = arg_to_signum (arg)) < 0) {
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nosig (arg);
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return 1;
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}
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continue;
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}
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/* `arg' begins with a dash but is not a known option.
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so it's probably something like -HUP, or -1/-n
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try to deal with it.
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-n could be signal n, or pid -n (i.e. process group n).
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If a signal has been parsed, assume it's a pid, break */
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if (do_kill)
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break;
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arg++;
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if ((numsig = arg_to_signum (arg)) < 0) {
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return usage (1);
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}
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do_kill++;
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if (do_pid)
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return usage (1);
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continue;
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}
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if (! *argv) {
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return usage (1);
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}
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if (do_pid) {
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numsig = -1;
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}
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/* we're done with the options.
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the rest of the arguments should be process ids and names.
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kill them. */
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for (errors = 0; (arg = *argv) != NULL; argv++) {
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pid = strtol (arg, &ep, 10);
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if (! *ep)
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errors += kill_verbose (arg, pid, numsig);
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else {
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pids = get_pids (arg, check_all);
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if (! pids) {
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errors++;
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fprintf (stderr, "%s: can't find process \"%s\"\n",
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whoami, arg);
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continue;
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}
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for (ip = pids; *ip >= 0; ip++)
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errors += kill_verbose (arg, *ip, numsig);
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free (pids);
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}
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}
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return (errors);
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}
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int signame_to_signum (char *sig)
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{
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int n;
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if (! strncasecmp (sig, "sig", 3))
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sig += 3;
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for (n = 1; (n < NSIG) && (sys_signame[n] != NULL); n++) {
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if (! strcasecmp (sys_signame[n], sig))
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return n;
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}
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return (-1);
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}
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int arg_to_signum (char *arg)
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{
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int numsig;
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char *ep;
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if (isdigit (*arg)) {
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numsig = strtol (arg, &ep, 10);
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if (*ep != 0 || numsig < 0 || numsig >= NSIG)
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return (-1);
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return (numsig);
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}
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return (signame_to_signum (arg));
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}
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void nosig (char *name)
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{
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fprintf (stderr, "%s: unknown signal %s; valid signals:\n", whoami, name);
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printsignals (stderr);
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}
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void printsig (int sig)
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{
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printf ("%s\n", sys_signame[sig]);
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}
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void printsignals (FILE *fp)
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{
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int n;
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for (n = 1; (n < NSIG) && (sys_signame[n] != NULL); n++) {
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fputs (sys_signame[n], fp);
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if (n == (NSIG / 2) || n == (NSIG - 1))
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fputc ('\n', fp);
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else
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fputc (' ', fp);
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}
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if (n < (NSIG - 1))
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fputc ('\n', fp);
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}
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int usage (int status)
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{
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FILE *fp;
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fp = (status == 0 ? stdout : stderr);
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fprintf (fp, "usage: %s [ -s signal | -p ] [ -a ] pid ...\n", whoami);
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fprintf (fp, " %s -l [ signal ]\n", whoami);
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return status;
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}
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int kill_verbose (char *procname, int pid, int sig)
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{
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if (sig < 0) {
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printf ("%d\n", pid);
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return 0;
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}
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if (kill (pid, sig) < 0) {
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fprintf (stderr, "%s ", whoami);
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perror (procname);
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return 1;
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}
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return 0;
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}
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