Warning, /cpukit/posix/src/README.md is written in an unsupported language. File is not indexed.
0001 mqueue
0002 ======
0003 This program should print out the default attribute settings for a
0004 POSIX message queue.
0005
0006 ```c
0007 #include <mqueue.h>
0008 #include <stdio.h>
0009
0010 main()
0011 {
0012 mqd_t mqfd;
0013 struct mq_attr mqstat;
0014 int status;
0015
0016 /* this should create it */
0017 mqfd = mq_open("myipc",O_WRONLY|O_CREAT,NULL);
0018 if ( (int)mqfd == -1 ) {
0019 perror( "Unable to open message queue" );
0020 exit( 1 );
0021 }
0022
0023 status = mq_getattr(mqfd, &mqstat);
0024 if ( !status ) {
0025 printf( "mq_maxmsg: %d\n", mqstat.mq_maxmsg );
0026 printf( "mq_msgsize: %d\n", mqstat.mq_msgsize );
0027 printf( "mq_curmsgs: %d\n", mqstat.mq_curmsgs );
0028 } else {
0029 perror( "Unable to get attributes on message queue" );
0030 exit( 1 );
0031 }
0032
0033 /* this should delete it */
0034 (void) mq_close( mqfd );
0035 exit( 0 );
0036 }
0037 ```
