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Utility for deleting message queues, semaphores and shared memory segments.

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Obtained from: NetBSD
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dfr 1994-09-13 16:52:12 +00:00
parent c6a6ca73a7
commit 9955df6ee4
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usr.bin/ipcrm/Makefile Normal file
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# $Id: Makefile,v 1.3.2.1 1994/08/09 13:47:15 mycroft Exp $
PROG= ipcrm
.include <bsd.prog.mk>

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.\" 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. 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.
.\"
.\" $Id: ipcrm.1,v 1.1 1994/08/09 02:26:30 glass Exp $
.\""
.Dd August 8th, 1994
.Dt ipcrm 1
.Os
.Sh NAME
.Nm ipcrm
.Nd remove the specified message queues, semaphore sets, and shared memory
segments
.Sh SYNOPSIS
.Nm ipcrm
.Op Fl q Ar msqid
.Op Fl m Ar shmid
.Op Fl s Ar semid
.Op Fl Q Ar msgkey
.Op Fl M Ar shmkey
.Op Fl S Ar semkey
.Ar ...
.Sh DESCRIPTION
.Nm ipcrm
removes the specified message queues, semaphores and shared memory
segments. These System V IPC objects can be specified by their
creation id or any associated key.
.Pp
The following options are used to specify which IPC objects will be removed. Any number and combination of these options can be used:
.Bl -tag -width indent
.It Fl q Ar msqid
Remove the message queue associated with the id
.Nm msqid
from the system.
.It Fl m Ar shmid
Mark the shared memory segment associated with id
.Nm shmid
for removal.
This marked segment will be destroyed after the last detach.
.It Fl s Ar semid
Removes the semaphore set associated with id
.Nm semid
from the system.
.It Fl Q Ar msgkey
Remove the message queue associated with key
.Nm msgkey
from the system.
.It Fl M Ar shmkey
Mark the shared memory segment associated with key
.Nm shmkey
for removal.
This marked segment will be destroyed after the last detach.
.It Fl S Ar semkey
Remove the semaphore set associated with key
.Nm semkey
from the system.
.El
.Pp
The identifiers and keys associated with these System V IPC objects can be
determined by using
.Xr ipcs 1
.
.Sh SEE ALSO
.Xr ipcs 1

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usr.bin/ipcrm/ipcrm.c Normal file
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/*
* 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.
*
* $Id: ipcrm.c,v 1.3.2.1 1994/08/08 05:51:08 mycroft Exp $
*/
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <err.h>
#include <signal.h>
#include <sys/types.h>
#include <sys/ipc.h>
#include <sys/msg.h>
#include <sys/sem.h>
#include <sys/shm.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"))
int signaled;
void usage()
{
fprintf(stderr, "usage: ipcrm [ [-q msqid] [-m shmid] [-s semid]\n");
fprintf(stderr, " [-Q msgkey] [-M shmkey] [-S semkey] ...]\n");
exit(1);
}
int msgrm(key, id)
key_t key;
int id;
{
if (key) {
id = msgget(key, 0);
if (id == -1)
return -1;
}
return msgctl(id, IPC_RMID, NULL);
}
int shmrm(key, id)
key_t key;
int id;
{
if (key) {
id = shmget(key, 0, 0);
if (id == -1)
return -1;
}
return shmctl(id, IPC_RMID, NULL);
}
int semrm(key, id)
key_t key;
int id;
{
union semun arg;
if (key) {
id = semget(key, 0, 0);
if (id == -1)
return -1;
}
return semctl(id, 0, IPC_RMID, arg);
}
void not_configured()
{
signaled++;
}
int main(argc, argv)
int argc;
char *argv[];
{
int c, result, errflg, target_id;
key_t target_key;
errflg = 0;
signal(SIGSYS, not_configured);
while ((c = getopt(argc, argv, ":q:m:s:Q:M:S:")) != -1) {
signaled = 0;
switch (c) {
case 'q':
case 'm':
case 's':
target_id = atoi(optarg);
if (c == 'q')
result = msgrm(0, target_id);
else if (c == 'm')
result = shmrm(0, target_id);
else
result = semrm(0, target_id);
if (result < 0) {
errflg++;
if (!signaled)
warn("%sid(%d): ", IPC_TO_STR(toupper(c)), target_id);
else
warnx("%ss are not configured in the running kernel",
IPC_TO_STRING(toupper(c)));
}
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;
}
if (c == 'Q')
result = msgrm(target_key, 0);
else if (c == 'M')
result = shmrm(target_key, 0);
else
result = semrm(target_key, 0);
if (result < 0) {
errflg++;
if (!signaled)
warn("%key(%ld): ", IPC_TO_STR(c), target_key);
else
warnx("%ss are not configured in the running kernel",
IPC_TO_STRING(c));
}
break;
case ':':
fprintf(stderr, "option -%c requires an argument\n", optopt);
usage();
case '?':
fprintf(stderr, "unrecognized option: -%c\n", optopt);
usage();
}
}
if (optind != argc) {
fprintf(stderr, "unknown argument: %s\n", argv[optind]);
usage();
}
exit(errflg);
}