feat: kill(2) implementation

[lunaix-os.git] / lunaix-os / kernel / lxinit.c

diff --git a/lunaix-os/kernel/lxinit.c b/lunaix-os/kernel/lxinit.c
index 57e2bda22421da102c8b063bca8adfd2f1fd58c4..fa5ce38783fc301b35e5fa0e452fcc9522acc933 100644 (file)
--- a/lunaix-os/kernel/lxinit.c
+++ b/lunaix-os/kernel/lxinit.c
@@ -5,6 +5,7 @@
 #include <lunaix/mm/kalloc.h>
 #include <lunaix/mm/vmm.h>
 #include <lunaix/proc.h>
+#include <lunaix/signal.h>
 #include <lunaix/spike.h>
 #include <lunaix/syslog.h>
 #include <lunaix/timer.h>
@@ -18,6 +19,20 @@ LOG_MODULE("INIT")
 #define WAIT_DEMO
 #define IN_USER_MODE
 
+void __USER__
+sigchild_handler(int signum)
+{
+    kprintf(KINFO "SIGCHLD received\n");
+}
+
+void __USER__
+sigsegv_handler(int signum)
+{
+    pid_t pid = getpid();
+    kprintf(KWARN "SIGSEGV received on process %d\n", pid);
+    _exit(signum);
+}
+
 void __USER__
 _lxinit_main()
 {
@@ -31,6 +46,9 @@ _lxinit_main()
     }
 #endif
 
+    signal(_SIGCHLD, sigchild_handler);
+    signal(_SIGSEGV, sigsegv_handler);
+
     int status;
 #ifdef WAIT_DEMO
     // 测试wait
@@ -41,6 +59,7 @@ _lxinit_main()
         kprintf("I am child, I am about to terminated\n");
         _exit(1);
     }
+    pause();
     pid_t child = wait(&status);
     kprintf("I am parent, my child (%d) terminated normally with code: %d.\n",
             child,
@@ -60,6 +79,7 @@ _lxinit_main()
     for (size_t i = 0; i < 5; i++) {
         pid_t pid = 0;
         if (!(pid = fork())) {
+            signal(_SIGSEGV, sigsegv_handler);
             sleep(i);
             if (i == 3) {
                 i = *(int*)0xdeadc0de; // seg fault!
@@ -73,7 +93,11 @@ _lxinit_main()
 
     while ((p = wait(&status)) >= 0) {
         short code = WEXITSTATUS(status);
-        if (WIFEXITED(status)) {
+        if (WIFSIGNALED(status)) {
+            kprintf(KINFO "Process %d terminated by signal, exit_code: %d\n",
+                    p,
+                    code);
+        } else if (WIFEXITED(status)) {
             kprintf(KINFO "Process %d exited with code %d\n", p, code);
         } else {
             kprintf(KWARN "Process %d aborted with code %d\n", p, code);