libiberty/waitpid.c

   1 /*
   2
   3 @deftypefn Supplemental int waitpid (int @var{pid}, int *@var{status}, int)
   4
   5 This is a wrapper around the @code{wait} function.  Any ``special''
   6 values of @var{pid} depend on your implementation of @code{wait}, as
   7 does the return value.  The third argument is unused in @libib{}.
   8
   9 @end deftypefn
  10
  11 */
  12
  13 #ifdef HAVE_CONFIG_H
  14 #include "config.h"
  15 #endif
  16 #include "ansidecl.h"
  17
  18 /* On some systems (such as WindISS), you must include <sys/types.h>
  19    to get the definition of "pid_t" before you include <sys/wait.h>.  */
  20 #include <sys/types.h>
  21
  22 #ifdef HAVE_SYS_WAIT_H
  23 #include <sys/wait.h>
  24 #endif
  25
  26 #ifdef __MINGW32__
  27 #include <process.h>
  28 #define wait(s)  _cwait(s,pid,_WAIT_CHILD)
  29 #endif
  30
  31 pid_t
  32 waitpid (pid_t pid, int *stat_loc, int options ATTRIBUTE_UNUSED)
  33 {
  34   for (;;)
  35     {
  36       int wpid = wait(stat_loc);
  37       if (wpid == pid || wpid == -1)
  38         return wpid;
  39     }
  40 }