init: run /etc/rc on boot

distro-files/etc/rc

@@ -1 +1,6 @@
-mkdir /tmp
+#!/usr/bin/bash
+mkdir -p /dev
+mount /dev devfs
+
+mkdir -p /tmp
+mount /tmp tmpfs

tools/init/main.c

@@ -7,6 +7,7 @@
 int main() {
 	printf("init: Welcome to Astral!\n");
 
+	// set up initial environmental variables
 	struct passwd* pw = getpwuid(getuid());
 	if (pw == NULL) {
 		perror("init: failed to open /etc/passwd");
@@ -23,24 +24,49 @@ int main() {
 	setenv("PATH", "/bin:/usr/bin:/usr/local/bin:/sbin:/usr/sbin:/usr/local/sbin", 1);
 	setenv("TERM", "linux", 1);
 
-	printf("init: running /usr/bin/bash\n");
-
+	// run rc to initialize environment (mount filesystems, etc)
+	printf("init: running /etc/rc\n");
 	pid_t pid = fork();
 	if (pid == -1) {
-		perror("init: fork failed:");
+		perror("init: fork failed");
+		return EXIT_FAILURE;
+	}
+
+	if (pid == 0) {
+		execl("/usr/bin/bash", "/usr/bin/bash", "/etc/rc", NULL);
+		perror("init: exec /usr/bin/bash failed");
+		return EXIT_FAILURE;
+	}
+
+	int status = 0;
+	if (waitpid(pid, &status, 0) == -1) {
+		perror("init: waitpid failed");
+		return EXIT_FAILURE;
+	}
+
+	if (WEXITSTATUS(status)) {
+		printf("/etc/rc returned failure status %d\n", WEXITSTATUS(status));
+		return EXIT_FAILURE;
+	}
+
+	// start user shell
+	printf("init: running /usr/bin/bash\n");
+	pid = fork();
+	if (pid == -1) {
+		perror("init: fork failed");
 		return EXIT_FAILURE;
 	}
 
 	if (pid == 0) {
 		execl("/usr/bin/bash", "/usr/bin/bash", "-l", NULL);
-		perror("init: execl /usr/bin/bash failed:");
+		perror("init: execl /usr/bin/bash failed");
 		return EXIT_FAILURE;
 	}
 
 	for (;;) {
 		int status;
 		if (waitpid(-1, &status, 0) == -1) {
-			perror("init: waitpid failed:");
+			perror("init: waitpid failed");
 			return EXIT_FAILURE;
 		}
 	}