NetBSD-5.0.2/usr.bin/ipcrm/ipcrm.c
/* $NetBSD: ipcrm.c,v 1.15 2008/08/18 02:12:35 dholland Exp $ */
/*
* Copyright (c) 1994 Adam Glass
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by Adam Glass.
* 4. The name of the Author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY Adam Glass ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL Adam Glass BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <sys/types.h>
#include <sys/ipc.h>
#include <sys/msg.h>
#include <sys/sem.h>
#include <sys/shm.h>
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <unistd.h>
#include <ctype.h>
#include <err.h>
#include <signal.h>
#include <sys/sysctl.h>
#define IPC_TO_STR(x) (x == 'Q' ? "msq" : (x == 'M' ? "shm" : "sem"))
#define IPC_TO_STRING(x) (x == 'Q' ? "message queue" : \
(x == 'M' ? "shared memory segment" : "semaphore"))
static sig_atomic_t signaled;
static void usage(void) __dead;
static int msgrm(key_t, int);
static int shmrm(key_t, int);
static int semrm(key_t, int);
static int msgrmall(void);
static int shmrmall(void);
static int semrmall(void);
static void not_configured(int);
static void
usage(void)
{
(void)fprintf(stderr, "Usage: %s [-M shmkey] [-m shmid] [-Q msgkey]\n",
getprogname());
(void)fprintf(stderr, "\t[-q msqid] [-S semkey] [-s semid] ...\n");
exit(1);
}
static int
msgrm(key_t key, int id)
{
if (key) {
id = msgget(key, 0);
if (id == -1)
return -1;
}
return msgctl(id, IPC_RMID, NULL);
}
static int
shmrm(key_t key, int id)
{
if (key) {
id = shmget(key, 0, 0);
if (id == -1)
return -1;
}
return shmctl(id, IPC_RMID, NULL);
}
static int
semrm(key_t key, int id)
{
if (key) {
id = semget(key, 0, 0);
if (id == -1)
return -1;
}
return semctl(id, 0, IPC_RMID, NULL);
}
static int
msgrmall(void)
{
int mib[4];
struct msg_sysctl_info *msgsi;
size_t i, len;
int result = 0;
mib[0] = CTL_KERN;
mib[1] = KERN_SYSVIPC;
mib[2] = KERN_SYSVIPC_INFO;
mib[3] = KERN_SYSVIPC_MSG_INFO;
if (sysctl(mib, 4, NULL, &len, NULL, 0) == -1)
err(1, "sysctl(KERN_SYSVIPC_MSG_INFO)");
if ((msgsi = malloc(len)) == NULL)
err(1, "malloc");
if (sysctl(mib, 4, msgsi, &len, NULL, 0) == -1) {
free(msgsi);
err(1, "sysctl(KERN_SYSVIPC_MSG_INFO)");
}
for (i = 0; i < msgsi->msginfo.msgmni; i++) {
struct msgid_ds_sysctl *msgptr = &msgsi->msgids[i];
if (msgptr->msg_qbytes != 0)
result -= msgrm((key_t)0,
(int)IXSEQ_TO_IPCID(i, msgptr->msg_perm));
}
free(msgsi);
return result;
}
static int
shmrmall(void)
{
int mib[4];
struct shm_sysctl_info *shmsi;
size_t i, len;
int result = 0;
mib[0] = CTL_KERN;
mib[1] = KERN_SYSVIPC;
mib[2] = KERN_SYSVIPC_INFO;
mib[3] = KERN_SYSVIPC_SHM_INFO;
if (sysctl(mib, 4, NULL, &len, NULL, 0) == -1)
err(1, "sysctl(KERN_SYSVIPC_SHM_INFO)");
if ((shmsi = malloc(len)) == NULL)
err(1, "malloc");
if (sysctl(mib, 4, shmsi, &len, NULL, 0) == -1) {
free(shmsi);
err(1, "sysctl(KERN_SYSVIPC_SHM_INFO)");
}
for (i = 0; i < shmsi->shminfo.shmmni; i++) {
struct shmid_ds_sysctl *shmptr = &shmsi->shmids[i];
if (shmptr->shm_perm.mode & 0x0800)
result -= shmrm((key_t)0,
(int)IXSEQ_TO_IPCID(i, shmptr->shm_perm));
}
free(shmsi);
return result;
}
static int
semrmall(void)
{
int mib[4];
struct sem_sysctl_info *semsi;
size_t i, len;
int result = 0;
mib[0] = CTL_KERN;
mib[1] = KERN_SYSVIPC;
mib[2] = KERN_SYSVIPC_INFO;
mib[3] = KERN_SYSVIPC_SEM_INFO;
if (sysctl(mib, 4, NULL, &len, NULL, 0) == -1)
err(1, "sysctl(KERN_SYSVIPC_SEM_INFO)");
if ((semsi = malloc(len)) == NULL)
err(1, "malloc");
if (sysctl(mib, 4, semsi, &len, NULL, 0) == -1) {
free(semsi);
err(1, "sysctl(KERN_SYSVIPC_SEM_INFO)");
}
for (i = 0; i < semsi->seminfo.semmni; i++) {
struct semid_ds_sysctl *semptr = &semsi->semids[i];
if ((semptr->sem_perm.mode & SEM_ALLOC) != 0)
result -= semrm((key_t)0,
(int)IXSEQ_TO_IPCID(i, semptr->sem_perm));
}
free(semsi);
return result;
}
static void
/*ARGSUSED*/
not_configured(int n)
{
signaled++;
}
int
main(int argc, char *argv[])
{
int c, result, errflg, target_id;
key_t target_key;
setprogname(argv[0]);
errflg = 0;
(void)signal(SIGSYS, not_configured);
while ((c = getopt(argc, argv, "q:m:s:Q:M:S:")) != -1) {
signaled = 0;
target_id = 0;
target_key = 0;
result = 0;
if (optarg != NULL && strcmp(optarg, "all") == 0) {
switch (c) {
case 'm':
case 'M':
result = shmrmall();
break;
case 'q':
case 'Q':
result = msgrmall();
break;
case 's':
case 'S':
result = semrmall();
break;
default:
usage();
}
} else {
switch (c) {
case 'q':
case 'm':
case 's':
target_id = atoi(optarg);
break;
case 'Q':
case 'M':
case 'S':
target_key = atol(optarg);
if (target_key == IPC_PRIVATE) {
warnx("can't remove private %ss",
IPC_TO_STRING(c));
continue;
}
break;
default:
usage();
}
switch (c) {
case 'q':
result = msgrm((key_t)0, target_id);
break;
case 'm':
result = shmrm((key_t)0, target_id);
break;
case 's':
result = semrm((key_t)0, target_id);
break;
case 'Q':
result = msgrm(target_key, 0);
break;
case 'M':
result = shmrm(target_key, 0);
break;
case 'S':
result = semrm(target_key, 0);
break;
}
}
if (result < 0) {
if (!signaled) {
if (target_id) {
warn("%sid(%d): ",
IPC_TO_STR(toupper(c)), target_id);
errflg++;
} else if (target_key) {
warn("%skey(%ld): ", IPC_TO_STR(c),
(long)target_key);
errflg++;
}
} else {
errflg++;
warnx("%ss are not configured in "
"the running kernel",
IPC_TO_STRING(toupper(c)));
}
}
}
if (optind != argc) {
warnx("Unknown argument: %s", argv[optind]);
usage();
}
return errflg;
}