301 lines
6.9 KiB
C
301 lines
6.9 KiB
C
/*
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* Copyright (c) 1994 Adam Glass
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* 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 Adam Glass.
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* 4. The name of the Author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY Adam Glass ``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 Adam Glass 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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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#define _WANT_MSG_PROTOTYPES
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#define _WANT_SEM_PROTOTYPES
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#define _WANT_SHM_PROTOTYPES
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#define _KERNEL
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#include <sys/sem.h>
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#include <sys/shm.h>
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#include <sys/msg.h>
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#undef _KERNEL
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#include <ctype.h>
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#include <err.h>
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#include <grp.h>
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#include <kvm.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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#include "ipc.h"
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static int signaled;
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static int errflg;
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static int rmverbose = 0;
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static void
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usage(void)
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{
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fprintf(stderr,
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"usage: ipcrm [-W] [-v[v]]\n"
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" [-q msqid] [-m shmid] [-s semid]\n"
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" [-Q msgkey] [-M shmkey] [-S semkey] ...\n");
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exit(1);
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}
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static int
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msgrm(key_t key, int id)
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{
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if (key == -1 || id == -1) {
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struct msqid_kernel *kxmsqids;
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size_t kxmsqids_len;
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int num;
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kget(X_MSGINFO, &msginfo, sizeof(msginfo));
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kxmsqids_len = sizeof(struct msqid_kernel) * msginfo.msgmni;
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kxmsqids = malloc(kxmsqids_len);
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kget(X_MSQIDS, kxmsqids, kxmsqids_len);
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num = msginfo.msgmni;
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while (num-- && !signaled)
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if (kxmsqids[num].u.msg_qbytes != 0) {
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id = IXSEQ_TO_IPCID(num,
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kxmsqids[num].u.msg_perm);
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if (msgctl(id, IPC_RMID, NULL) < 0) {
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if (rmverbose > 1)
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warn("msqid(%d): ", id);
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errflg++;
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} else
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if (rmverbose)
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printf(
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"Removed %s %d\n",
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IPC_TO_STRING('Q'),
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id);
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}
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return signaled ? -1 : 0; /* errors maybe handled above */
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}
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if (key) {
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id = msgget(key, 0);
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if (id == -1)
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return -1;
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}
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return msgctl(id, IPC_RMID, NULL);
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}
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static int
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shmrm(key_t key, int id)
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{
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if (key == -1 || id == -1) {
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struct shmid_kernel *kxshmids;
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size_t kxshmids_len;
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int num;
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kget(X_SHMINFO, &shminfo, sizeof(shminfo));
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kxshmids_len = sizeof(struct shmid_kernel) * shminfo.shmmni;
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kxshmids = malloc(kxshmids_len);
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kget(X_SHMSEGS, kxshmids, kxshmids_len);
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num = shminfo.shmmni;
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while (num-- && !signaled)
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if (kxshmids[num].u.shm_perm.mode & 0x0800) {
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id = IXSEQ_TO_IPCID(num,
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kxshmids[num].u.shm_perm);
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if (shmctl(id, IPC_RMID, NULL) < 0) {
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if (rmverbose > 1)
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warn("shmid(%d): ", id);
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errflg++;
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} else
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if (rmverbose)
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printf(
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"Removed %s %d\n",
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IPC_TO_STRING('M'),
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id);
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}
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return signaled ? -1 : 0; /* errors maybe handled above */
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}
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if (key) {
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id = shmget(key, 0, 0);
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if (id == -1)
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return -1;
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}
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return shmctl(id, IPC_RMID, NULL);
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}
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static int
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semrm(key_t key, int id)
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{
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union semun arg;
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if (key == -1 || id == -1) {
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struct semid_kernel *kxsema;
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size_t kxsema_len;
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int num;
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kget(X_SEMINFO, &seminfo, sizeof(seminfo));
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kxsema_len = sizeof(struct semid_kernel) * seminfo.semmni;
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kxsema = malloc(kxsema_len);
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kget(X_SEMA, kxsema, kxsema_len);
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num = seminfo.semmni;
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while (num-- && !signaled)
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if ((kxsema[num].u.sem_perm.mode & SEM_ALLOC) != 0) {
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id = IXSEQ_TO_IPCID(num,
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kxsema[num].u.sem_perm);
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if (semctl(id, 0, IPC_RMID, NULL) < 0) {
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if (rmverbose > 1)
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warn("semid(%d): ", id);
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errflg++;
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} else
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if (rmverbose)
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printf(
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"Removed %s %d\n",
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IPC_TO_STRING('S'),
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id);
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}
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return signaled ? -1 : 0; /* errors maybe handled above */
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}
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if (key) {
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id = semget(key, 0, 0);
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if (id == -1)
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return -1;
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}
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return semctl(id, 0, IPC_RMID, arg);
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}
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static void
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not_configured(int signo __unused)
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{
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signaled++;
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}
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int
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main(int argc, char *argv[])
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{
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int c, result, target_id;
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key_t target_key;
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while ((c = getopt(argc, argv, "q:m:s:Q:M:S:vWy")) != -1) {
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signaled = 0;
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switch (c) {
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case 'v':
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rmverbose++;
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break;
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case 'y':
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use_sysctl = 0;
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break;
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}
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}
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optind = 1;
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errflg = 0;
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signal(SIGSYS, not_configured);
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while ((c = getopt(argc, argv, "q:m:s:Q:M:S:vWy")) != -1) {
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signaled = 0;
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switch (c) {
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case 'q':
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case 'm':
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case 's':
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target_id = atoi(optarg);
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if (c == 'q')
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result = msgrm(0, target_id);
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else if (c == 'm')
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result = shmrm(0, target_id);
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else
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result = semrm(0, target_id);
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if (result < 0) {
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errflg++;
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if (!signaled)
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warn("%sid(%d): ",
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IPC_TO_STR(toupper(c)), target_id);
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else
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warnx(
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"%ss are not configured "
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"in the running kernel",
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IPC_TO_STRING(toupper(c)));
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}
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break;
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case 'Q':
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case 'M':
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case 'S':
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target_key = atol(optarg);
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if (target_key == IPC_PRIVATE) {
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warnx("can't remove private %ss",
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IPC_TO_STRING(c));
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continue;
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}
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if (c == 'Q')
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result = msgrm(target_key, 0);
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else if (c == 'M')
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result = shmrm(target_key, 0);
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else
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result = semrm(target_key, 0);
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if (result < 0) {
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errflg++;
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if (!signaled)
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warn("%ss(%ld): ",
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IPC_TO_STR(c), target_key);
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else
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warnx("%ss are not configured "
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"in the running kernel",
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IPC_TO_STRING(c));
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}
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break;
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case 'v':
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case 'y':
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/* Handled in other getopt() loop */
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break;
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case 'W':
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msgrm(-1, 0);
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shmrm(-1, 0);
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semrm(-1, 0);
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break;
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case ':':
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fprintf(stderr,
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"option -%c requires an argument\n", optopt);
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usage();
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case '?':
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fprintf(stderr, "unrecognized option: -%c\n", optopt);
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usage();
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}
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}
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if (optind != argc) {
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fprintf(stderr, "unknown argument: %s\n", argv[optind]);
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usage();
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}
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exit(errflg);
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}
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