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