81 lines
1.5 KiB
C
81 lines
1.5 KiB
C
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#include <sys/ipc.h>
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#include <sys/msg.h>
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#include "yasnd.h"
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pid_t ipc_clone_pid;
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int open_queue()
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{
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key_t keyval=ftok(".",'m');
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int qid;
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if((qid = msgget( keyval, IPC_CREAT | 0660 )) == -1)
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{
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log_event("Error opening/creating IPC message queue");
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exit(EXIT_FAILURE);
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}
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return qid;
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}
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int send_message(int qid, mymsgbuf* qbuf)
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{
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int result;
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/* The length is essentially the size of the structure minus sizeof(mtype) */
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int length = sizeof(mymsgbuf) - sizeof(long);
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if((result = msgsnd( qid, qbuf, length, 0)) == -1)
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{
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return -1;
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}
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return result;
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}
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int read_message(int qid, mymsgbuf* qbuf, long type)
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{
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int result;
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int length = sizeof(mymsgbuf) - sizeof(long);
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if((result = msgrcv( qid, qbuf, length, type, 0)) == -1)
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{
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return -1;
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}
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return result;
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}
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int remove_queue( int qid )
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{
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if( msgctl(qid, IPC_RMID, 0) == -1)
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{
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return -1;
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}
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return 0;
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}
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int ipc_queue_loop()
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{
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// set default signal handlers
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signal(SIGTERM,SIG_DFL);
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signal(SIGHUP,SIG_DFL);
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//
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mymsgbuf qbuf;
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while(1)
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{
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int result=read_message(qid, &qbuf, 1);
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if (result==-1)
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{
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log_event("Error: finishing IPC loop process...");
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return 1;
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}
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char dbg_txt[150];
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sprintf(dbg_txt,"Read IPC message - Type: %ld Text: %s", qbuf.mtype, qbuf.mtext);
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log_debug(dbg_txt,DEBUG_ALL);
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}
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}
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void ipc_init()
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{
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qid = open_queue();
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unsigned char ipc_child_stack[16384];
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ipc_clone_pid=clone(ipc_queue_loop,ipc_child_stack+8192,CLONE_VM,NULL);
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}
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