process: add initial SIGCHLD handling

diff --git a/Kernel/process.c b/Kernel/process.c
index b4f8d45..337af07 100644 (file)
--- a/Kernel/process.c
+++ b/Kernel/process.c
@@ -553,6 +553,22 @@ void acctexit(ptptr p)
 }
 #endif
 
+/* Perform the terminal process signalling */
+static int signal_parent(ptptr p)
+{
+        if (p->p_ignored & (1UL << SIGCHLD)) {
+               /* POSIX.1 says that SIG_IGN for SIGCHLD means don't go
+                  zombie, just clean up as we go */
+               p->p_status = P_EMPTY;
+                return 0;
+       }
+       ssig(p, SIGCHLD);
+       /* Wake up a waiting parent, if any. */
+       wakeup((char *)p);
+       p->p_status = P_ZOMBIE;
+       return 1;
+}
+
 void doexit(int16_t val, int16_t val2)
 {
        int16_t j;
@@ -601,6 +617,7 @@ void doexit(int16_t val, int16_t val2)
                if (p->p_status == P_EMPTY || p == udata.u_ptab)
                        continue;
                /* Set any child's parents to our parent */
+               /* FIXME: do we need to wakeup the parent if we do this ? */
                if (p->p_pptr == udata.u_ptab)
                        p->p_pptr = udata.u_ptab->p_pptr;
                /* Send SIGHUP to any pgrp members and remove
@@ -623,13 +640,7 @@ void doexit(int16_t val, int16_t val2)
 #endif
         udata.u_page = 0xFFFFU;
         udata.u_page2 = 0xFFFFU;
-       /* FIXME: send SIGCLD here */
-       /* FIXME: POSIX.1 says that SIG_IGN for SIGCLD means don't go
-          zombie, just clean up as we go */
-       /* Wake up a waiting parent, if any. */
-       wakeup((char *) udata.u_ptab->p_pptr);
-
-       udata.u_ptab->p_status = P_ZOMBIE;
+        signal_parent(udata.u_ptab->p_pptr);
        nready--;
        nproc--;