librt/mq_unlink.c

   1 /*
   2  * mq_unlink.c - remove a message queue.
   3  */
   4
   5 #include <errno.h>
   6 #include <sys/syscall.h>
   7
   8 #include <mqueue.h>
   9
  10 #ifdef __NR_mq_unlink
  11
  12 #define __NR___syscall_mq_unlink __NR_mq_unlink
  13 static __inline__ _syscall1(int, __syscall_mq_unlink, const char *, name);
  14
  15 /* Remove message queue */
  16 int mq_unlink(const char *name)
  17 {
  18         int ret;
  19
  20         if (name[0] != '/') {
  21                 __set_errno(EINVAL);
  22                 return -1;
  23         }
  24
  25         ret = __syscall_mq_unlink(name + 1);
  26
  27         /* While unlink can return either EPERM or EACCES, mq_unlink should return just EACCES.  */
  28         if (ret < 0) {
  29                 ret = errno;
  30                 if (ret == EPERM)
  31                         ret = EACCES;
  32                 __set_errno(ret);
  33                 ret = -1;
  34         }
  35
  36         return ret;
  37 }
  38
  39 #endif