lib/posix/_getppid.c

   1 #include <lib.h>
   2 #define getppid _getppid
   3 #include <unistd.h>
   4
   5 PUBLIC pid_t getppid()
   6 {
   7   message m;
   8
   9   /* POSIX says that this function is always successful and that no
  10    * return value is reserved to indicate an error.  Minix syscalls
  11    * are not always successful and Minix returns the reserved value
  12    * (pid_t) -1 when there is an error.
  13    */
  14   if (_syscall(MM, GETPID, &m) < 0) return ( (pid_t) -1);
  15   return( (pid_t) m.m2_i1);
  16 }