prefork-interp: fix exit status and signal handling

Signed-off-by: Ian Jackson <ijackson@chiark.greenend.org.uk>

diff --git a/cprogs/prefork-interp.c b/cprogs/prefork-interp.c
index fe02827c1d67466d325e801572efbc7932eeb144..3a999ef4c629d0339f6a7ffab5cf7fe021fbfb79 100644 (file)
--- a/cprogs/prefork-interp.c
+++ b/cprogs/prefork-interp.c
@@ -448,7 +448,7 @@ static void propagate_exit_status(int status, const char *what) {
   int r;
 
   if (WIFEXITED(status)) {
-    _exit(status);
+    _exit(WEXITSTATUS(status));
   }
 
   if (WIFSIGNALED(status)) {
@@ -458,22 +458,25 @@ static void propagate_exit_status(int status, const char *what) {
 
     if (! WCOREDUMP(status) &&
        (sig == SIGINT ||
+        sig == SIGTERM ||
         sig == SIGHUP ||
         sig == SIGPIPE ||
         sig == SIGKILL)) {
       struct sigaction sa;
       FILLZERO(sa);
       sa.sa_handler = SIG_DFL;
-      r = sigaction(sig, &sa, 0);
-      if (r) diee("failed to reset signal handler while propagating %s",
-                 signame);
-
-      sigset_t sset;
-      sigemptyset(&sset);
-      sigaddset(&sset, sig);
-      r = sigprocmask(SIG_UNBLOCK, &sset, 0);
-      if (r) diee("failed to reset signal block while propagating %s",
-                 signame);
+      if (sig != SIGKILL) {
+        r = sigaction(sig, &sa, 0);
+        if (r) diee("failed to reset signal handler while propagating %s",
+                    signame);
+
+        sigset_t sset;
+        sigemptyset(&sset);
+        sigaddset(&sset, sig);
+        r = sigprocmask(SIG_UNBLOCK, &sset, 0);
+        if (r) diee("failed to reset signal block while propagating %s",
+                    signame);
+      }
 
       raise(sig);
       die("unexpectedly kept running after raising (to propagate) %s",
@@ -743,7 +746,8 @@ static const char *read_greeting(void) {
   char got_magic[sizeof(header_magic)];
 
   if (protocol_read_maybe(&got_magic, sizeof(got_magic)) < 0)
-    return "initial monitor process quit";
+    return "initial monitor process quit"
+      " (maybe script didn't call preform_initialisation_complete?)";
 
   if (memcmp(got_magic, header_magic, sizeof(header_magic)))
     die("got unexpected protocol magic 0x%02x%02x%02x%02x",