52 lines
1.0 KiB
C
52 lines
1.0 KiB
C
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/* $FreeBSD$ */
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#include <stdio.h>
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#include <mqueue.h>
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#include <fcntl.h>
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#include <signal.h>
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#include <errno.h>
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#define MQNAME "/mytstqueue1"
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int main()
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{
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struct mq_attr attr, attr2;
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struct sigevent sigev;
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int mq;
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int status;
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attr.mq_maxmsg = 2;
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attr.mq_msgsize = 100;
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mq = mq_open(MQNAME, O_CREAT | O_RDWR | O_EXCL, 0666, &attr);
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if (mq == -1)
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err(1, "mq_open");
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status = mq_unlink(MQNAME);
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if (status)
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err(1, "mq_unlink");
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status = mq_getattr(mq, &attr2);
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if (status)
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err(1, "mq_getattr");
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if (attr.mq_maxmsg != attr2.mq_maxmsg)
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err(1, "mq_maxmsg changed");
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if (attr.mq_msgsize != attr2.mq_msgsize)
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err(1, "mq_msgsize changed");
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sigev.sigev_notify = SIGEV_SIGNAL;
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sigev.sigev_signo = SIGRTMIN;
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status = mq_notify(mq, &sigev);
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if (status)
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err(1, "mq_notify");
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status = mq_notify(mq, &sigev);
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if (status == 0)
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err(1, "mq_notify 2");
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else if (errno != EBUSY)
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err(1, "mq_notify 3");
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status = mq_notify(mq, NULL);
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if (status)
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err(1, "mq_notify 4");
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status = mq_close(mq);
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if (status)
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err(1, "mq_close");
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return (0);
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}
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