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40 lines
948 B
C
40 lines
948 B
C
// RUN: %clang -O1 %s -o %t && %run %t
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// UNSUPPORTED: android
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#include <assert.h>
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#include <errno.h>
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#include <stdio.h>
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#include <string.h>
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#include <sys/msg.h>
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#define CHECK_STRING "hello, world!"
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#define MSG_BUFLEN 0x100
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int main() {
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int msgq = msgget(IPC_PRIVATE, 0666);
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if (msgq == -1) perror("msgget:");
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assert(msgq != -1);
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struct msg_s {
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long mtype;
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char string[MSG_BUFLEN];
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};
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struct msg_s msg = {
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.mtype = 1};
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strcpy(msg.string, CHECK_STRING);
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int res = msgsnd(msgq, &msg, MSG_BUFLEN, IPC_NOWAIT);
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if (res) {
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fprintf(stderr, "Error sending message! %s\n", strerror(errno));
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msgctl(msgq, IPC_RMID, NULL);
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return -1;
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}
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struct msg_s rcv_msg;
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ssize_t len = msgrcv(msgq, &rcv_msg, MSG_BUFLEN, msg.mtype, IPC_NOWAIT);
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assert(len == MSG_BUFLEN);
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assert(msg.mtype == rcv_msg.mtype);
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assert(!memcmp(msg.string, rcv_msg.string, MSG_BUFLEN));
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msgctl(msgq, IPC_RMID, NULL);
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return 0;
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}
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