Mercurial > hg > toybox
changeset 1547:be3133639b72 draft
ipcrm : remove msg que, sem or shared memory
author | Ashwini Sharma <ak.ashwini1981@gmail.com> |
---|---|
date | Mon, 10 Nov 2014 15:25:35 -0600 |
parents | aa74fb336bf4 |
children | e3216b4e6a0f |
files | toys/pending/ipcrm.c |
diffstat | 1 files changed, 91 insertions(+), 0 deletions(-) [+] |
line wrap: on
line diff
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/toys/pending/ipcrm.c Mon Nov 10 15:25:35 2014 -0600 @@ -0,0 +1,91 @@ +/* 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); + } + } +}