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/* ipcrm.c - remove msg que, sem or shared memory
*
* Copyright 2014 Ashwini Kumar <ak.ashwini1981@gmail.com>
*
* See http://pubs.opengroup.org/onlinepubs/9699919799/utilities/ipcrm.html
USE_IPCRM(NEWTOY(ipcrm, "m*M*s*S*q*Q*", TOYFLAG_USR|TOYFLAG_BIN))
config IPCRM
bool "ipcrm"
default n
help
usage: ipcrm [ [-q msqid] [-m shmid] [-s semid]
[-Q msgkey] [-M shmkey] [-S semkey] ... ]
-mM Remove memory segment after last detach
-qQ Remove message queue
-sS Remove semaphore
*/
#define FOR_ipcrm
#include "toys.h"
#include <sys/ipc.h>
#include <sys/shm.h>
#include <sys/sem.h>
#include <sys/msg.h>
GLOBALS(
struct arg_list *qkey;
struct arg_list *qid;
struct arg_list *skey;
struct arg_list *sid;
struct arg_list *mkey;
struct arg_list *mid;
)
static void do_ipcrm(int key, int ipc, char *name)
{
char *c;
int id, ret = 0;
id = strtol(name, &c, 0);
if (*c) {
error_msg("invalid number :%s", name);
return;
}
if (key) {
if (id == IPC_PRIVATE) {
error_msg("illegal key (%s)", name);
return;
}
id = ((ipc == 1)?shmget(id, 0, 0) :
(ipc == 2)? msgget(id, 0): semget(id, 0, 0));
if (id < 0) {
perror_msg("key (%s)", name);
return;
}
}
if (ipc == 1) ret = shmctl(id, IPC_RMID, NULL);
else if (ipc == 2) ret = msgctl(id, IPC_RMID, NULL);
else if (ipc == 3) ret = semctl(id, 0, IPC_RMID, NULL);
if (ret < 0) perror_msg("%s (%s)", ((key)? "key": "id"), name);
}
void ipcrm_main(void)
{
++toys.argv;
if (toys.optc && (!strcmp(*toys.argv, "shm") ||
!strcmp(*toys.argv, "sem") || !strcmp(*toys.argv, "msg"))) {
int t = (toys.argv[0][1] == 'h')? 1 : (toys.argv[0][1] == 's')? 2:3;
while (*(++toys.argv)) do_ipcrm(0, t, *toys.argv);
} else {
struct arg_list *tmp;
for (tmp = TT.mkey; tmp; tmp = tmp->next) do_ipcrm(1, 1, tmp->arg);
for (tmp = TT.mid; tmp; tmp = tmp->next) do_ipcrm(0, 1, tmp->arg);
for (tmp = TT.qkey; tmp; tmp = tmp->next) do_ipcrm(1, 2, tmp->arg);
for (tmp = TT.qid; tmp; tmp = tmp->next) do_ipcrm(0, 2, tmp->arg);
for (tmp = TT.skey; tmp; tmp = tmp->next) do_ipcrm(1, 3, tmp->arg);
for (tmp = TT.sid; tmp; tmp = tmp->next) do_ipcrm(0, 3, tmp->arg);
if (toys.optc) {
toys.exithelp++;
error_exit("unknown argument: %s", *toys.optargs);
}
}
}
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