Boot framework rework (#45)

[lunaix-os.git] / lunaix-os / usr / init / init.c

diff --git a/lunaix-os/usr/init/init.c b/lunaix-os/usr/init/init.c
index 0ed0d0b9d035ca82330bb461873b0a7786aaf8a2..25996ce6c03b368b1d5d57d1a66532bc7c89af55 100644 (file)
--- a/lunaix-os/usr/init/init.c
+++ b/lunaix-os/usr/init/init.c
@@ -1,43 +1,89 @@
 #include <errno.h>
 #include <fcntl.h>
 #include <lunaix/lunaix.h>
+#include <lunaix/mount.h>
+#include <termios.h>
 #include <stdio.h>
 #include <unistd.h>
 
+#define must_mount(src, target, fs, opts)                                      \
+    do {                                                                       \
+        int err = 0;                                                           \
+        if ((err = mount(src, target, fs, opts))) {                            \
+            syslog(2, "mount fs %s to %s failed (%d)\n", fs, target, errno);   \
+            return err;                                                        \
+        }                                                                      \
+    } while (0)
+
+#define maybe_mount(src, target, fs, opts)                                      \
+    do {                                                                       \
+        int err = 0;                                                           \
+        if ((err = mount(src, target, fs, opts))) {                            \
+            syslog(2, "mount fs %s to %s failed (%d)\n", fs, target, errno);   \
+        }                                                                      \
+    } while (0)
+
+#define check(statement)                                                       \
+    ({                                                                         \
+        int err = 0;                                                           \
+        if ((err = (statement)) < 0) {                                         \
+            syslog(2, #statement " failed: %d", err);                          \
+            _exit(1);                                                          \
+        }                                                                      \
+        err;                                                                   \
+    })
+
+int
+init_termios(int fd) {
+    struct termios term;
+
+    check(tcgetattr(fd, &term));
+
+    term.c_lflag = ICANON | IEXTEN | ISIG | ECHO | ECHOE | ECHONL;
+    term.c_iflag = ICRNL | IGNBRK;
+    term.c_oflag = ONLCR | OPOST;
+    term.c_cflag = CREAD | CLOCAL | CS8 | CPARENB;
+    term.c_cc[VERASE] = 0x7f;
+    
+    cfsetispeed(&term, B9600);
+    cfsetospeed(&term, B9600);
+
+    check(tcsetattr(fd, 0, &term));
+
+    return 0;
+}
+
+const char* sh_argv[] = { "/bin/sh", 0  };
+const char* sh_envp[] = {  0  };
+
 int
 main(int argc, const char** argv)
 {
-    int err = 0;
+    must_mount(NULL, "/dev", "devfs", 0);
+    must_mount(NULL, "/sys", "twifs", MNT_RO);
+    must_mount(NULL, "/task", "taskfs", MNT_RO);
 
-    if ((err = open("/dev/tty", 0)) < 0) {
-        syslog(2, "fail to open tty (%d)\n", errno);
-        return 0;
-    }
+    int fd = check(open("/dev/tty", 0));
 
-    if ((err = dup(err)) < 0) {
-        syslog(2, "fail to setup tty i/o (%d)\n", errno);
-        return 0;
-    }
+    check(init_termios(fd));
 
-    printf("(%p) user space!\n", (void*)main);
-
-    if ((err = symlink("/usr", "/mnt/lunaix-os/usr"))) {
-        syslog(2, "symlink /usr:/mnt/lunaix-os/usr (%d)\n", errno);
-        return 0;
-    }
+    check(dup(fd));
 
     pid_t pid;
+    int err = 0;
     if (!(pid = fork())) {
-        err = execve("/usr/bin/sh", NULL, NULL);
+        err = execve(sh_argv[0], sh_argv, sh_envp);
         printf("fail to execute (%d)\n", errno);
         _exit(err);
     }
 
     waitpid(pid, &err, 0);
 
-    if (err) {
-        printf("shell exit abnormally (%d)", err);
+    if (WEXITSTATUS(err)) {
+        printf("shell exit abnormally (%d)\n", err);
     }
 
-    return 0;
+    printf("init exiting\n");
+
+    return err;
 }
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