The handling of negative values for msgtyp argument is incorrect.<br />
From 'man msgrcv'<br />
<br />
ssize_t msgrcv(int msqid, void *msgp, size_t msgsz, long msgtyp,<br />
int msgflg);<br />
<br />
* If msgtyp is less than 0, then the first message in the queue <br />
with the lowest type less than or equal to the<br />
absolute value of msgtyp will be read.
↧