First commit

2025-10-01 12:41:12 -06:00
commit 5139653429
11 changed files with 319 additions and 0 deletions
--- a/libexec/boot.c
+++ b/libexec/boot.c
@@ -0,0 +1,100 @@
+#include "config.h"
+void boot(void)
+{
+	log("Mounting pseudo filesystem...");
+	{
+		mount("proc", "/proc", "proc", MS_NOSUID | MS_NOEXEC | MS_NODEV,
+		      NULL);
+		mount("sys", "/sys", "sysfs", MS_NOSUID | MS_NOEXEC | MS_NODEV,
+		      NULL);
+		mount("cache", "/var/cache", "tmpfs",
+		      MS_NOSUID | MS_NOEXEC | MS_NODEV, "mode=0777");
+		mount("tmp", "/tmp", "tmpfs", MS_NOSUID | MS_NOEXEC | MS_NODEV,
+		      "mode=0777");
+		mount("run", "/run", "tmpfs", MS_NOSUID | MS_NODEV,
+		      "mode=0777");
+		mount("dev", "/dev", "devtmpfs", MS_NOSUID, "mode=0755");
+
+		mkdir("/dev/pts", 0755);
+		mkdir("/dev/shm", 0755);
+		mount("devpts", "/dev/pts", "devpts", MS_NOSUID | MS_NOEXEC,
+		      "mode=0620,gid=5");
+		mount("shm", "/dev/shm", "tmpfs", MS_NOSUID | MS_NODEV,
+		      "mode=1777");
+
+		symlink("/proc/self/fd", "/dev/fd");
+		symlink("fd/0", "/dev/stdin");
+		symlink("fd/1", "/dev/stdout");
+		symlink("fd/2", "/dev/stderr");
+
+		mkdir("/run/lock", 0755);
+	}
+
+	log("Set up loopback...");
+	{
+		int fd, i;
+		struct sockaddr_in *addr;
+		struct ifreq iface;
+		const char *ifname = "lo";
+
+		fd = socket(PF_INET, SOCK_DGRAM, IPPROTO_IP);
+
+		iface.ifr_addr.sa_family = AF_INET;
+		for (i = 0; iface.ifr_name[i] = ifname[i]; ++i)
+			;
+
+		addr = (struct sockaddr_in *)&iface.ifr_addr;
+
+		addr->sin_family = AF_INET;
+		addr->sin_addr.s_addr = 0x0100007f;
+		ioctl(fd, SIOCSIFADDR, &iface);
+
+		addr->sin_family = AF_INET;
+		addr->sin_addr.s_addr = 0x0000ff;
+		ioctl(fd, SIOCSIFNETMASK, &iface);
+
+		iface.ifr_flags |= (IFF_UP | IFF_RUNNING | IFF_LOOPBACK);
+		ioctl(fd, SIOCSIFFLAGS, &iface);
+
+		close(fd);
+	}
+
+	log("Setting hostname...");
+	{
+		char buf[64];
+		long result;
+		int input, output;
+
+#warning callback if HOSTNAME doesnot exists
+		input = open(HOSTFILE, O_RDONLY);
+		output = open("/proc/sys/kernel/hostname", O_WRONLY);
+
+		while (result = read(input, buf, sizeof(buf)))
+			write(output, buf, result);
+
+		close(input);
+		close(output);
+	}
+	log("Seeding urandom...");
+	{
+		char buf[64];
+		long result;
+		int input, output;
+
+		output = open("/dev/urandom", O_WRONLY);
+
+#warning callback if input doesnot exists
+		if (input = open(SEEDFILE, O_RDONLY))
+			;
+		{
+			while (result = read(input, buf, sizeof(buf)))
+				write(output, buf, result);
+		}
+
+		close(input);
+		close(output);
+	}
+
+	log("Running programs...");
+	runprgs((void *)boot_cmd, sizeof(boot_cmd) / sizeof(boot_cmd[0]));
+}