waitpid.c revision 104834 
1/*
2
3@deftypefn Supplemental int waitpid (int @var{pid}, int *@var{status}, int)
4
5This is a wrapper around the @code{wait} function.  Any ``special''
6values of @var{pid} depend on your implementation of @code{wait}, as
7does 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
17/* On some systems (such as WindISS), you must include <sys/types.h>
18   to get the definition of "pid_t" before you include <sys/wait.h>.  */
19#include <sys/types.h>
20
21#ifdef HAVE_SYS_WAIT_H
22#include <sys/wait.h>
23#endif
24
25pid_t
26waitpid (pid, stat_loc, options)
27     pid_t pid;
28     int *stat_loc, options;
29{
30  for (;;)
31    {
32      int wpid = wait(stat_loc);
33      if (wpid == pid || wpid == -1)
34	return wpid;
35    }
36}
37