feat: pause(2) support

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

diff --git a/lunaix-os/kernel/lxinit.c b/lunaix-os/kernel/lxinit.c
index d951a9fc6f5e553f108d9d3d5b36703b3f4195df..2de87c5900d59d773499f956123eaae871ba89fe 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>
@@ -16,8 +17,15 @@ LOG_MODULE("INIT")
 
 // #define FORK_BOMB_DEMO
 #define WAIT_DEMO
+#define IN_USER_MODE
 
-void
+void __USER__
+sigchild_handler(int signum)
+{
+    kprintf(KINFO "SIGCHLD received\n");
+}
+
+void __USER__
 _lxinit_main()
 {
 #ifdef FORK_BOMB_DEMO
@@ -30,6 +38,9 @@ _lxinit_main()
     }
 #endif
 
+    signal(_SIGCHLD, sigchild_handler);
+
+    int status;
 #ifdef WAIT_DEMO
     // 测试wait
     kprintf("I am parent, going to fork my child and wait.\n");
@@ -39,15 +50,23 @@ _lxinit_main()
         kprintf("I am child, I am about to terminated\n");
         _exit(1);
     }
-    int status;
+    pause();
     pid_t child = wait(&status);
-    kprintf(
-      "I am parent, my child (%d) terminated with code: %d.\n", child, status);
+    kprintf("I am parent, my child (%d) terminated normally with code: %d.\n",
+            child,
+            WEXITSTATUS(status));
 #endif
 
-    sleep(5);
+    pid_t p = 0;
+
+    if (!fork()) {
+        kprintf("Test no hang!\n");
+        sleep(6);
+        _exit(0);
+    }
+
+    waitpid(-1, &status, WNOHANG);
 
-    // 这里是就是LunaixOS的第一个进程了！
     for (size_t i = 0; i < 10; i++) {
         pid_t pid = 0;
         if (!(pid = fork())) {
@@ -62,6 +81,15 @@ _lxinit_main()
         kprintf(KINFO "Forked %d\n", pid);
     }
 
+    while ((p = wait(&status)) >= 0) {
+        short code = WEXITSTATUS(status);
+        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);
+        }
+    }
+
     char buf[64];
 
     kprintf(KINFO "Hello processes!\n");
@@ -76,15 +104,15 @@ _lxinit_main()
     struct kdb_keyinfo_pkt keyevent;
     while (1) {
         if (!kbd_recv_key(&keyevent)) {
-            // yield();
+            yield();
             continue;
         }
         if ((keyevent.state & KBD_KEY_FPRESSED) &&
             (keyevent.keycode & 0xff00) <= KEYPAD) {
             tty_put_char((char)(keyevent.keycode & 0x00ff));
-            tty_sync_cursor();
+            // FIXME: io to vga port is privileged and cause #GP in user mode
+            // tty_sync_cursor();
         }
     }
-
     spin();
 }
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