314 lines
7.0 KiB
C
314 lines
7.0 KiB
C
/* $NetBSD: ipcrm.c,v 1.16 2009/01/18 01:06:42 lukem Exp $ */
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/*
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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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#include <sys/types.h>
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#include <sys/ipc.h>
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#include <sys/msg.h>
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#include <sys/sem.h>
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#include <sys/shm.h>
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#include <stdio.h>
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#include <string.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <ctype.h>
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#include <err.h>
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#include <signal.h>
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#include <sys/sysctl.h>
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#define IPC_TO_STR(x) (x == 'Q' ? "msq" : (x == 'M' ? "shm" : "sem"))
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#define IPC_TO_STRING(x) (x == 'Q' ? "message queue" : \
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(x == 'M' ? "shared memory segment" : "semaphore"))
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static sig_atomic_t signaled;
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static void usage(void) __dead;
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static int msgrm(key_t, int);
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static int shmrm(key_t, int);
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static int semrm(key_t, int);
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static int msgrmall(void);
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static int shmrmall(void);
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static int semrmall(void);
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static void not_configured(int);
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static void
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usage(void)
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{
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(void)fprintf(stderr, "Usage: %s [-M shmkey] [-m shmid] [-Q msgkey]\n",
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getprogname());
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(void)fprintf(stderr, "\t[-q msqid] [-S semkey] [-s semid] ...\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) {
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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) {
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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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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, NULL);
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}
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static int
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msgrmall(void)
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{
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int mib[4];
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struct msg_sysctl_info *msgsi;
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int32_t i;
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size_t len;
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int result = 0;
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mib[0] = CTL_KERN;
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mib[1] = KERN_SYSVIPC;
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mib[2] = KERN_SYSVIPC_INFO;
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mib[3] = KERN_SYSVIPC_MSG_INFO;
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if (sysctl(mib, 4, NULL, &len, NULL, 0) == -1)
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err(1, "sysctl(KERN_SYSVIPC_MSG_INFO)");
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if ((msgsi = malloc(len)) == NULL)
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err(1, "malloc");
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if (sysctl(mib, 4, msgsi, &len, NULL, 0) == -1) {
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free(msgsi);
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err(1, "sysctl(KERN_SYSVIPC_MSG_INFO)");
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}
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for (i = 0; i < msgsi->msginfo.msgmni; i++) {
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struct msgid_ds_sysctl *msgptr = &msgsi->msgids[i];
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if (msgptr->msg_qbytes != 0)
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result -= msgrm((key_t)0,
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(int)IXSEQ_TO_IPCID(i, msgptr->msg_perm));
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}
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free(msgsi);
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return result;
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}
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static int
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shmrmall(void)
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{
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int mib[4];
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struct shm_sysctl_info *shmsi;
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size_t i, len;
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int result = 0;
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mib[0] = CTL_KERN;
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mib[1] = KERN_SYSVIPC;
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mib[2] = KERN_SYSVIPC_INFO;
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mib[3] = KERN_SYSVIPC_SHM_INFO;
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if (sysctl(mib, 4, NULL, &len, NULL, 0) == -1)
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err(1, "sysctl(KERN_SYSVIPC_SHM_INFO)");
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if ((shmsi = malloc(len)) == NULL)
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err(1, "malloc");
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if (sysctl(mib, 4, shmsi, &len, NULL, 0) == -1) {
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free(shmsi);
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err(1, "sysctl(KERN_SYSVIPC_SHM_INFO)");
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}
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for (i = 0; i < shmsi->shminfo.shmmni; i++) {
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struct shmid_ds_sysctl *shmptr = &shmsi->shmids[i];
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if (shmptr->shm_perm.mode & 0x0800)
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result -= shmrm((key_t)0,
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(int)IXSEQ_TO_IPCID(i, shmptr->shm_perm));
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}
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free(shmsi);
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return result;
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}
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static int
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semrmall(void)
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{
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int mib[4];
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struct sem_sysctl_info *semsi;
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size_t len;
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int32_t i;
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int result = 0;
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mib[0] = CTL_KERN;
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mib[1] = KERN_SYSVIPC;
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mib[2] = KERN_SYSVIPC_INFO;
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mib[3] = KERN_SYSVIPC_SEM_INFO;
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if (sysctl(mib, 4, NULL, &len, NULL, 0) == -1)
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err(1, "sysctl(KERN_SYSVIPC_SEM_INFO)");
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if ((semsi = malloc(len)) == NULL)
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err(1, "malloc");
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if (sysctl(mib, 4, semsi, &len, NULL, 0) == -1) {
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free(semsi);
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err(1, "sysctl(KERN_SYSVIPC_SEM_INFO)");
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}
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for (i = 0; i < semsi->seminfo.semmni; i++) {
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struct semid_ds_sysctl *semptr = &semsi->semids[i];
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if ((semptr->sem_perm.mode & SEM_ALLOC) != 0)
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result -= semrm((key_t)0,
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(int)IXSEQ_TO_IPCID(i, semptr->sem_perm));
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}
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free(semsi);
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return result;
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}
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static void
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/*ARGSUSED*/
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not_configured(int n)
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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, errflg, target_id;
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key_t target_key;
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setprogname(argv[0]);
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errflg = 0;
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(void)signal(SIGSYS, not_configured);
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while ((c = getopt(argc, argv, "q:m:s:Q:M:S:")) != -1) {
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signaled = 0;
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target_id = 0;
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target_key = 0;
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result = 0;
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if (optarg != NULL && strcmp(optarg, "all") == 0) {
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switch (c) {
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case 'm':
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case 'M':
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result = shmrmall();
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break;
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case 'q':
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case 'Q':
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result = msgrmall();
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break;
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case 's':
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case 'S':
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result = semrmall();
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break;
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default:
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usage();
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}
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} else {
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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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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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break;
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default:
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usage();
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}
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switch (c) {
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case 'q':
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result = msgrm((key_t)0, target_id);
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break;
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case 'm':
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result = shmrm((key_t)0, target_id);
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break;
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case 's':
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result = semrm((key_t)0, target_id);
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break;
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case 'Q':
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result = msgrm(target_key, 0);
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break;
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case 'M':
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result = shmrm(target_key, 0);
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break;
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case 'S':
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result = semrm(target_key, 0);
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break;
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}
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}
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if (result < 0) {
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if (!signaled) {
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if (target_id) {
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warn("%sid(%d): ",
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IPC_TO_STR(toupper(c)), target_id);
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errflg++;
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} else if (target_key) {
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warn("%skey(%ld): ", IPC_TO_STR(c),
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(long)target_key);
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errflg++;
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}
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} else {
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errflg++;
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warnx("%ss are not configured in "
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"the running kernel",
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IPC_TO_STRING(toupper(c)));
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}
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}
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}
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if (optind != argc) {
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warnx("Unknown argument: %s", argv[optind]);
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usage();
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}
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return errflg;
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}
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