X-Git-Url: https://diplodocus.org/git/nmh/blobdiff_plain/1691e80890e5d8ba258c51c214a3e91880e1db2b..90da0bc237f9ce5fbcfa77083be3e5545a1d3aec:/sbr/pidwait.c

diff --git a/sbr/pidwait.c b/sbr/pidwait.c
index 4bd02e3e..a6dc27f9 100644
--- a/sbr/pidwait.c
+++ b/sbr/pidwait.c
@@ -2,52 +2,36 @@
 /*
  * pidwait.c -- wait for child to exit
  *
- * $Id$
+ * This code is Copyright (c) 2002, by the authors of nmh.  See the
+ * COPYRIGHT file in the root directory of the nmh distribution for
+ * complete copyright information.
  */
 
 #include <h/mh.h>
 #include <h/signals.h>
-#include <signal.h>
-
-#ifdef HAVE_SYS_WAIT_H
-# include <sys/wait.h>
-#endif
 
 int
 pidwait (pid_t id, int sigsok)
 {
     pid_t pid;
-    sigset_t set, oset;
+    SIGNAL_HANDLER istat = NULL, qstat = NULL;
 
-#ifdef WAITINT
     int status;
-#else
-    union wait status;
-#endif
 
     if (sigsok == -1) {
-	/* block a couple of signals */
-	sigemptyset (&set);
-	sigaddset (&set, SIGINT);
-	sigaddset (&set, SIGQUIT);
-	SIGPROCMASK (SIG_BLOCK, &set, &oset);
+	/* ignore a couple of signals */
+	istat = SIGNAL (SIGINT, SIG_IGN);
+	qstat = SIGNAL (SIGQUIT, SIG_IGN);
     }
 
-#ifdef HAVE_WAITPID
-    pid = waitpid(id, &status, 0);
-#else
-    while ((pid = wait(&status)) != -1 && pid != id)
-	continue;
-#endif
+    while ((pid = waitpid(id, &status, 0)) == -1 && errno == EINTR)
+	;
 
     if (sigsok == -1) {
-	/* reset the signal mask */
-	SIGPROCMASK (SIG_SETMASK, &oset, &set);
+	/* reset the signal handlers */
+	SIGNAL (SIGINT, istat);
+	SIGNAL (SIGQUIT, qstat);
     }
 
-#ifdef WAITINT
     return (pid == -1 ? -1 : status);
-#else
-    return (pid == -1 ? -1 : status.w_status);
-#endif
 }