Merge from emacs--devo--0

Patches applied:

 * emacs--devo--0  (patch 662-669)

   - Update from CVS
   - Fix read-only prompt problem in isearch
   - Merge from gnus--rel--5.10

 * gnus--rel--5.10  (patch 207-208)

   - Merge from emacs--devo--0
   - Update from CVS

Revision: emacs@sv.gnu.org/emacs--unicode--0--patch-184

1 files changed, 10 insertions, 6 deletions

diff --git a/src/process.c b/src/process.c
index 4611ce2c05c..f3162c9d3e5 100644
--- a/src/process.c
+++ b/src/process.c
@@ -6401,12 +6401,16 @@ sigchld_handler (signo)
 #define WUNTRACED 0
 #endif /* no WUNTRACED */
       /* Keep trying to get a status until we get a definitive result.  */
-      do
-        {
-          errno = 0;
-          pid = wait3 (&w, WNOHANG | WUNTRACED, 0);
-        }
-      while (pid < 0 && errno == EINTR);
+      while (1) {
+        errno = 0;
+        pid = wait3 (&w, WNOHANG | WUNTRACED, 0);
+        if (! (pid < 0 && errno == EINTR))
+          break;
+        /* avoid a busyloop: wait3 is a system call, so we do not want
+           to prevent the kernel from actually sending SIGCHLD to emacs
+           by asking for it all the time */
+        sleep (1);
+      }
 
       if (pid <= 0)
         {