refactor: restructure the user space stuff.

[lunaix-os.git] / lunaix-os / uprog / signal_demo.c

diff --git a/lunaix-os/uprog/signal_demo.c b/lunaix-os/uprog/signal_demo.c
deleted file mode 100644 (file)
index 8a9bdc6..0000000
--- a/lunaix-os/uprog/signal_demo.c
+++ /dev/null
@@ -1,75 +0,0 @@
-#include <signal.h>
-#include <stdio.h>
-#include <sys/lunaix.h>
-#include <unistd.h>
-
-void
-sigchild_handler(int signum)
-{
-    printf("SIGCHLD received\n");
-}
-
-void
-sigsegv_handler(int signum)
-{
-    pid_t pid = getpid();
-    printf("SIGSEGV received on process %d\n", pid);
-    _exit(signum);
-}
-
-void
-sigalrm_handler(int signum)
-{
-    pid_t pid = getpid();
-    printf("I, pid %d, have received an alarm!\n", pid);
-}
-
-void
-main()
-{
-    signal(SIGCHLD, sigchild_handler);
-    signal(SIGSEGV, sigsegv_handler);
-    signal(SIGALRM, sigalrm_handler);
-
-    alarm(5);
-
-    int status;
-    pid_t p = 0;
-
-    printf("Child sleep 3s, parent pause.\n");
-    if (!fork()) {
-        sleep(3);
-        _exit(0);
-    }
-
-    pause();
-
-    printf("Parent resumed on SIGCHILD\n");
-
-    for (int 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!
-            }
-            printf("%d\n", i);
-            _exit(0);
-        }
-        printf("Forked %d\n", pid);
-    }
-
-    while ((p = wait(&status)) >= 0) {
-        short code = WEXITSTATUS(status);
-        if (WIFSIGNALED(status)) {
-            printf("Process %d terminated by signal, exit_code: %d\n", p, code);
-        } else if (WIFEXITED(status)) {
-            printf("Process %d exited with code %d\n", p, code);
-        } else {
-            printf("Process %d aborted with code %d\n", p, code);
-        }
-    }
-
-    printf("done\n");
-}
\ No newline at end of file