changeset 1547:be3133639b72

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);
+    }
+  }
+}