Update README_en.md

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

diff --git a/lunaix-os/kernel/lxinit.c b/lunaix-os/kernel/lxinit.c
index 1485c3411e4d95266642876f8481f0b9b3168173..91a4e504192401162709b8dafad6d11b266e8b38 100644 (file)
--- a/lunaix-os/kernel/lxinit.c
+++ b/lunaix-os/kernel/lxinit.c
@@ -25,6 +25,21 @@ 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__
+sigalrm_handler(int signum)
+{
+    pid_t pid = getpid();
+    kprintf(KWARN "I, pid %d, have received an alarm!\n", pid);
+}
+
 void __USER__
 _lxinit_main()
 {
@@ -39,6 +54,10 @@ _lxinit_main()
 #endif
 
     signal(_SIGCHLD, sigchild_handler);
+    signal(_SIGSEGV, sigsegv_handler);
+    signal(_SIGALRM, sigalrm_handler);
+
+    alarm(5);
 
     int status;
 #ifdef WAIT_DEMO
@@ -50,6 +69,7 @@ _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,
@@ -66,9 +86,10 @@ _lxinit_main()
 
     waitpid(-1, &status, WNOHANG);
 
-    for (size_t i = 0; i < 10; i++) {
+    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!
@@ -82,7 +103,11 @@ _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);