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rtems/cpukit/posix/src/README.mqueue
T
Joel Sherrill 9b4422a251 Remove All CVS Id Strings Possible Using a Script
Script does what is expected and tries to do it as
smartly as possible.

+ remove occurrences of two blank comment lines
  next to each other after Id string line removed.
+ remove entire comment blocks which only exited to
  contain CVS Ids
+ If the processing left a blank line at the top of
  a file, it was removed.
2012-05-11 08:44:13 -05:00

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This program should print out the default attribute settings for a
POSIX message queue.
#include <mqueue.h>
#include <stdio.h>
main()
{
mqd_t mqfd;
struct mq_attr mqstat;
int status;
/* this should create it */
mqfd = mq_open("myipc",O_WRONLY|O_CREAT,NULL);
if ( (int)mqfd == -1 ) {
perror( "Unable to open message queue" );
exit( 1 );
}
status = mq_getattr(mqfd, &mqstat);
if ( !status ) {
printf( "mq_maxmsg: %d\n", mqstat.mq_maxmsg );
printf( "mq_msgsize: %d\n", mqstat.mq_msgsize );
printf( "mq_curmsgs: %d\n", mqstat.mq_curmsgs );
} else {
perror( "Unable to get attributes on message queue" );
exit( 1 );
}
/* this should delete it */
(void) mq_close( mqfd );
exit( 0 );
}