usr/src/cmd/killall/killall.c

   1 /*
   2  * CDDL HEADER START
   3  *
   4  * The contents of this file are subject to the terms of the
   5  * Common Development and Distribution License, Version 1.0 only
   6  * (the "License").  You may not use this file except in compliance
   7  * with the License.
   8  *
   9  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
  10  * or http://www.opensolaris.org/os/licensing.
  11  * See the License for the specific language governing permissions
  12  * and limitations under the License.
  13  *
  14  * When distributing Covered Code, include this CDDL HEADER in each
  15  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  16  * If applicable, add the following below this CDDL HEADER, with the
  17  * fields enclosed by brackets "[]" replaced with your own identifying
  18  * information: Portions Copyright [yyyy] [name of copyright owner]
  19  *
  20  * CDDL HEADER END
  21  */
  22 /*      Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */
  23 /*        All Rights Reserved   */
  24
  25
  26 /*
  27  * Copyright (c) 1998 by Sun Microsystems, Inc.
  28  * All rights reserved.
  29  */
  30 #ident  "%Z%%M% %I%     %E% SMI"        /* SVr4.0 1.21  */
  31
  32 #include <sys/types.h>
  33 #include <signal.h>
  34 #include <errno.h>
  35 #include <utmpx.h>
  36 #include <stdio.h>
  37 #include <unistd.h>
  38
  39 int
  40 main(int argc, char *argv[])
  41 {
  42         int sig;
  43         struct utmpx *u;
  44         char usage[] = "usage: killall [signal]\n";
  45         char perm[] = "permission denied\n";
  46
  47         if (geteuid() != 0) {
  48                 (void) write(2, perm, sizeof (perm)-1);
  49                 return (1);
  50         }
  51         switch (argc) {
  52                 case 1:
  53                         sig = SIGTERM;
  54                         break;
  55                 case 2:
  56                         if (str2sig(argv[1], &sig) == 0)
  57                                 break;
  58                 default:
  59                         (void) write(2, usage, sizeof (usage)-1);
  60                         return (1);
  61         }
  62
  63         while ((u = getutxent()) != NULL) {
  64                 if ((u->ut_type == LOGIN_PROCESS) ||
  65                     (u->ut_type == USER_PROCESS))
  66                         (void) kill(u->ut_pid, sig);
  67         }
  68         endutxent();
  69
  70         return (0);
  71 }