beginnings of new stage1

1 files changed, 759 insertions, 0 deletions

diff --git a/loader/init.c b/loader/init.c
new file mode 100644
index 000000000..1b653f319
--- /dev/null
+++ b/loader/init.c
@@ -0,0 +1,759 @@
+/*
+ * init.c
+ * 
+ * This is the install type init 
+ *
+ * Erik Troan (ewt@redhat.com)
+ *
+ * Copyright 1996 Red Hat Software 
+ *
+ * This software may be freely redistributed under the terms of the GNU
+ * public license.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ *
+ */
+
+#if USE_MINILIBC
+#include "minilibc.h"
+#else
+#include <ctype.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <net/if.h>
+#include <signal.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/ioctl.h>
+#include <sys/klog.h>
+#include <sys/mount.h>
+#include <sys/socket.h>
+#include <sys/stat.h>
+#include <sys/time.h>
+#include <sys/types.h>
+#include <sys/un.h>
+#include <sys/wait.h>
+#include <unistd.h>
+#include <sys/ioctl.h>
+#include <sys/reboot.h>
+#include <termios.h>
+
+
+#define syslog klogctl
+#endif
+
+#define KICK_FLOPPY     1
+#define KICK_BOOTP	2
+
+#define MS_REMOUNT      32
+
+#define ENV_PATH 		0
+#define ENV_LD_LIBRARY_PATH 	1
+#define ENV_HOME		2
+#define ENV_TERM		3
+#define ENV_DEBUG		4
+
+char * environ[] = {
+    "PATH=/usr/bin:/bin:/sbin:/usr/sbin:/mnt/sbin:/mnt/usr/sbin:"
+		   "/mnt/bin:/mnt/usr/bin",
+    "LD_LIBRARY_PATH=/lib:/usr/lib:/mnt/lib:/mnt/usr/lib",
+    "HOME=/",
+    "TERM=linux",
+    "DEBUG=",
+    NULL
+};
+
+
+/* 
+ * this needs to handle the following cases:
+ *
+ *	1) run from a CD root filesystem
+ *	2) run from a read only nfs rooted filesystem
+ *      3) run from a floppy
+ *	4) run from a floppy that's been loaded into a ramdisk 
+ *
+ */
+
+int testing;
+
+void printstr(char * string) {
+    write(1, string, strlen(string));
+}
+
+void fatal_error(int usePerror) {
+/* FIXME */
+#if 0
+    if (usePerror) 
+	perror("failed:");
+    else
+#endif
+	printf("failed.\n");
+
+    printf("\nI can't recover from this.\n");
+    while (1) ;
+}
+
+int doMke2fs(char * device, char * size) {
+    char * args[] = { "/usr/bin/mke2fs", NULL, NULL, NULL };
+    int pid, status;
+
+    args[1] = device;
+    args[2] = size;
+
+    if (!(pid = fork())) {
+	/* child */
+	execve("/usr/bin/mke2fs", args, environ);
+	fatal_error(1);
+    }
+
+    wait4(-1, &status, 0, NULL);
+    
+    return 0;
+}
+
+int hasNetConfiged(void) {
+    int rc;
+    int s;
+    struct ifconf configs;
+    struct ifreq devs[10];
+
+    #ifdef __i386__
+	return 0;
+    #endif
+
+    s = socket(AF_INET, SOCK_STREAM, 0);
+    if (s < 0) {
+	/* FIXME was perror*/
+	printf("error creating socket: %d\n", errno);
+	return 0;
+    } else {
+	/* this is just good enough to tell us if we have anything 
+	   configured */
+	configs.ifc_len = sizeof(devs);
+	configs.ifc_buf = (void *) devs;
+
+	rc = ioctl(s, SIOCGIFCONF, &configs);
+	if (rc < 0) {
+	    /* FIXME was perror*/
+	    printstr("SIOCGIFCONF");
+	    return 0;
+	}
+	if (configs.ifc_len == 0) {
+	    return 0;
+	}
+
+	return 1;
+    }
+
+    return 0;
+}
+
+void doklog(char * fn) {
+    fd_set readset, unixs;
+    int in, out, i;
+    int log;
+    int s;
+    int sock = -1;
+    struct sockaddr_un sockaddr;
+    char buf[1024];
+    int readfd;
+
+    in = open("/proc/kmsg", O_RDONLY,0);
+    if (in < 0) {
+	/* FIXME: was perror */
+	printstr("open /proc/kmsg");
+	return;
+    }
+
+    out = open(fn, O_WRONLY, 0);
+    if (out < 0) 
+	printf("couldn't open %s for syslog -- still using /tmp/syslog\n", fn);
+
+    log = open("/tmp/syslog", O_WRONLY | O_CREAT, 0644);
+    if (log < 0) {
+	/* FIXME: was perror */
+	printstr("error opening /tmp/syslog");
+	sleep(5);
+	
+	close(in);
+	return;
+    }
+
+    /* if we get this far, we should be in good shape */
+
+    if (fork()) {
+	/* parent */
+	close(in);
+	close(out);
+	close(log);
+	return;
+    }
+    close(0); 
+    close(1);
+    close(2);
+
+    dup2(1, log);
+
+#if defined(USE_LOGDEV)
+    /* now open the syslog socket */
+    sockaddr.sun_family = AF_UNIX;
+    strcpy(sockaddr.sun_path, "/dev/log");
+    sock = socket(AF_UNIX, SOCK_STREAM, 0);
+    if (sock < 0) {
+	printf("error creating socket: %d\n", errno);
+	sleep(5);
+    }
+    printstr("got socket\n");
+    if (bind(sock, (struct sockaddr *) &sockaddr, sizeof(sockaddr.sun_family) + 
+			strlen(sockaddr.sun_path))) {
+	printf("bind error: %d\n", errno);
+	sleep(5);
+    }
+    printstr("bound socket\n");
+    chmod("/dev/log", 0666);
+    if (listen(sock, 5)) {
+	printf("listen error: %d\n", errno);
+	sleep(5);
+    }
+#endif
+
+    syslog(8, NULL, 1);
+
+    FD_ZERO(&unixs);
+    while (1) {
+	memcpy(&readset, &unixs, sizeof(unixs));
+
+	if (sock >= 0) FD_SET(sock, &readset);
+	FD_SET(in, &readset);
+
+	i = select(20, &readset, NULL, NULL, NULL);
+	if (i <= 0) continue;
+
+	if (FD_ISSET(in, &readset)) {
+	    i = read(in, buf, sizeof(buf));
+	    if (i > 0) {
+		if (out >= 0) write(out, buf, i);
+		write(log, buf, i);
+	    }
+	} 
+
+	for (readfd = 0; readfd < 20; ++readfd) {
+	    if (FD_ISSET(readfd, &readset) && FD_ISSET(readfd, &unixs)) {
+		i = read(readfd, buf, sizeof(buf));
+		if (i > 0) {
+		    if (out >= 0) {
+			write(out, buf, i);
+			write(out, "\n", 1);
+		    }
+
+		    write(log, buf, i);
+		    write(log, "\n", 1);
+		} else if (i == 0) {
+		    /* socket closed */
+		    close(readfd);
+		    FD_CLR(readfd, &unixs);
+		}
+	    }
+	}
+
+	if (sock >= 0 && FD_ISSET(sock, &readset)) {
+	    s = sizeof(sockaddr);
+	    readfd = accept(sock, (struct sockaddr *) &sockaddr, &s);
+	    if (readfd < 0) {
+		if (out >= 0) write(out, "error in accept\n", 16);
+		write(log, "error in accept\n", 16);
+		close(sock);
+		sock = -1;
+	    } else {
+		FD_SET(readfd, &unixs);
+	    }
+	}
+    }    
+}
+
+#if defined(__alpha__)
+char * findKernel(void) {
+    char * dev, * file;
+    struct stat sb;
+
+    dev = getenv("bootdevice");
+    file = getenv("bootfile");
+
+    if (!dev || !file) {
+	printf("I can't find your kernel. When you are booting"
+		" from a CDROM, you must pass\n");
+	printf("the bootfile argument to the kernel if your"
+		" boot loader doesn't do so automatically.\n");
+	printf("\n");
+	printf("You should now reboot your system and try "	
+		"again\n");
+
+	while (1) ;
+    }
+
+    if (!strcmp(dev, "fd0")) {
+	if (!strcmp(file, "vmlinux.gz")) {
+	    printf("The kernel on a boot floppy must be named vmlinux.gz. "
+	           "You\n");
+	    printf("are using a kernel named %s instead. You'll have "
+		   "to\n", file);
+	    printf("fix this and try again.\n");
+
+	    while (1) ;
+	}
+
+	return NULL;
+    } else {
+	if (stat(file, &sb)) {
+	    printf("I can't find your kernel. When you are booting"
+		    " from a CDROM, you must pass\n");
+	    printf("the bootfile argument to the kernel if your"
+		    " boot loader doesn't do so automatically.\n");
+	    printf("\n");
+	    printf("You should now reboot your system and try "	
+		    "again\n");
+
+	    while (1) ;
+	}
+
+	return file;
+    }
+}
+#endif 
+
+int setupTerminal(int fd) {
+    struct winsize winsize;
+
+    if (ioctl(fd, TIOCGWINSZ, &winsize)) {
+	printf("failed to get winsize");
+	fatal_error(1);
+    }
+
+    winsize.ws_row = 24;
+    winsize.ws_col = 80;
+
+    if (ioctl(fd, TIOCSWINSZ, &winsize)) {
+	printf("failed to set winsize");
+	fatal_error(1);
+    }
+
+    environ[ENV_TERM] = "TERM=vt100";
+
+    return 0;
+}
+
+void unmountFilesystems(void) {
+    int fd, size;
+    char buf[65535];			/* this should be big enough */
+    char * chptr, * start;
+    struct {
+	char * name;
+	int len;
+    } filesystems[500], tmp;
+    int numFilesystems = 0;
+    int i, j;
+
+    fd = open("/proc/mounts", O_RDONLY, 0);
+    if (fd < 1) {
+	/* FIXME: was perror */
+	printstr("failed to open /proc/mounts");
+	sleep(2);
+	return;
+    }
+
+    size = read(fd, buf, sizeof(buf) - 1);
+    buf[size] = '\0';
+
+    close(fd);
+
+    chptr = buf;
+    while (*chptr) {
+	while (*chptr != ' ') chptr++;
+	chptr++;
+	start = chptr;
+	while (*chptr != ' ') chptr++;
+	*chptr++ = '\0';
+	filesystems[numFilesystems].name = start;
+	filesystems[numFilesystems].len = strlen(start);
+	numFilesystems++;
+	while (*chptr != '\n') chptr++;
+	chptr++;
+    }
+
+    /* look ma, a *bubble* sort */
+    for (i = 0; i < (numFilesystems - 1); i++) {
+	for (j = i; j < numFilesystems; j++) {
+	    if (filesystems[i].len < filesystems[j].len) {
+		tmp = filesystems[i];
+		filesystems[i] = filesystems[j];
+		filesystems[j] = tmp;
+	    }
+	}
+    }
+
+    /* -1 because the last one will always be '/' */
+    for (i = 0; i < numFilesystems - 1; i++) {
+	printf("\t%s", filesystems[i].name);
+	/* don't need to unmount /tmp.  it is busy anyway. */
+	if (!testing && strncmp(filesystems[i].name, "/tmp", 4)) {
+	    if (umount(filesystems[i].name) < 0) {
+		/* FIXME printf(" failed: %s", strerror(errno));*/
+		printstr(" umount failed");
+	    }
+	}
+	printf("\n");
+    }
+}
+
+void readargs(int * isRescue, int * isSerial, int * isExpert, int * isKick,
+	      int * forceSupp, int * isNetwork) {
+    char buf[512];
+    char * arg;
+    int fd;
+    int size;
+    int done = 0;
+    char * start, * end;
+
+    printf("opening /proc/cmdline... ");
+
+    if ((fd = open("/proc/cmdline", O_RDONLY, 0)) < 0) fatal_error(1);
+
+    size = read(fd, buf, sizeof(buf) - 1);
+    buf[size] = '\0';
+    close(fd);
+
+    printf("done\n");
+
+    printf("checking command line arguments... ");
+    start = buf;
+
+    while (!done) {
+	while (*start && isspace(*start)) start++;
+	if (!(*start)) break;
+	
+	end = start;
+	while (*end && !isspace(*end) && *end != '\n') end++;
+
+	if (!*end) done = 1;
+	*end = '\0';
+
+	if (!*start ||
+	    !strcmp(start, "auto") ||
+	    !strncmp(start, "BOOT_IMAGE", 10) ||
+	    !strncmp(start, "initrd=", 7) ||
+	    !strncmp(start, "bootdevice=", 11) ||
+	    !strncmp(start, "bootfile=", 9) ||
+	    !strcmp(start, "ro") ||
+	    !strncmp(start, "root=", 5) ||
+	    !strncmp(start, "mem=", 4) ||
+	    !strncmp(start, "hda=", 4) ||
+	    !strncmp(start, "hdb=", 4) ||
+	    !strncmp(start, "hdc=", 4) ||
+	    !strncmp(start, "hdd=", 4) ||
+	    !strncmp(start, "load_ramdisk", 12) ||
+	    !strncmp(start, "prompt_ramdisk", 14)) {
+	    /* lilo does this for us -- we don't care */
+	} else if (!strcmp(start, "debug")) {
+	    printf("\n\tdebug disk mode enabled");
+	    environ[ENV_DEBUG] = "DEBUG=1";
+	} else if (!strcmp(start, "rescue")) {
+	    printf("\n\trescue disk mode enabled");
+	    *isRescue = 1;
+	} else if (!strcmp(start, "serial")) {
+	    printf("\n\tserial mode enabled");
+	    *isSerial = 1;
+	} else if (!strcmp(start, "expert")) {
+	    printf("\n\texpert mode enabled");
+	    *isExpert = 1;
+	} else if (!strcmp(start, "supp")) {
+	    *forceSupp = 1;
+	} else if (!strcmp(start, "local")) {
+	    *isNetwork = 0;
+	} else if (!strcmp(start, "network")) {
+	    *isNetwork = 1;
+	} else if (!strncmp(start, "kickstart", 9) || 
+                   !strncmp(start, "ks", 2)) {
+	    arg = strchr(start, '=');
+
+	    if (arg) {
+		*isKick = KICK_FLOPPY;
+		printf("\n\ta floppy kickstart install will be performed");
+	    } else {
+		*isKick = KICK_BOOTP;
+		printf("\n\ta bootp kickstart install will be performed");
+	    }
+	} else {
+	    printf("\n\tunknown option '%s'!", start);
+	    sleep(5);
+	}
+
+	start = end + 1;
+    }
+    printf("done\n");
+}
+
+int main(void) {
+    pid_t installpid, childpid;
+    int waitStatus;
+    int fd;
+    int nfsRoot = 0;
+    int roRoot = 0;
+    int cdRoot = 0;
+    int isRescue = 0;
+    int isSerial = 0;
+    int isExpert = 0;
+    int isKick = 0;
+    int isNetwork = 0;
+    int doReboot = 0;
+    int doShutdown =0;
+    int forceSupp = 0;
+#ifdef __alpha__
+    char * kernel;
+#endif
+    char * argv[15];
+    char ** argvp = argv;
+
+    /* getpid() != 1 should work, by linuxrc tends to get a larger pid */
+    testing = (getpid() > 50);
+
+    if (!testing) {
+	/* turn off screen blanking */
+	printstr("\033[9;0]");
+	printstr("\033[8]");
+    }
+
+    printstr("hello\n");
+
+    printf("Red Hat install init version %s starting\n", VERSION);
+
+    printf("mounting /proc filesystem... "); 
+
+    if (!testing) {
+	if (mount("/proc", "/proc", "proc", 0, NULL))
+	    fatal_error(1);
+    }
+
+    printf("done\n");
+
+    readargs(&isRescue, &isSerial, &isExpert, &isKick, &forceSupp, &isNetwork);
+
+    if (isSerial) {
+	fd = open("/dev/ttyS0", O_RDWR, 0);
+	if (fd < 0) {
+	    printf("failed to open /dev/ttyS0");
+	    fatal_error(1);
+	}
+	write(fd, "Switching to serial console...", 29);
+
+	/* gulp */
+	dup2(fd, 0);
+	dup2(fd, 1);
+	dup2(fd, 2);
+	
+	printf("done\n\n");
+
+	printf("Red Hat install init version %s using a serial console\n", 
+		VERSION);
+
+	printf("remember, cereal is an important part of a nutritionally "
+	       "balanced breakfast.\n\n");
+
+	setupTerminal(0);
+
+	close(fd);
+    }
+
+    if (!testing) {
+	sethostname("localhost.localdomain", 21);
+	/* the default domainname (as of 2.0.35) is "(none)", which confuses 
+	   glibc */
+	setdomainname("", 0);
+    }
+
+    printf("checking for NFS root filesystem...");
+    if (hasNetConfiged()) {
+	printf("yes\n");
+	roRoot = nfsRoot = 1;
+    } else {
+	printf("no\n");
+    }
+
+    if (!nfsRoot) {
+	printf("trying to remount root filesystem read write... ");
+	if (mount("/", "/", NULL, MS_REMOUNT | MS_MGC_VAL, NULL)) {
+	    printf("failed (but that's okay)\n");
+	
+	    roRoot = 1;
+	} else {
+	    printf("done\n");
+
+	    /* 2.0.18 (at least) lets us remount a CD r/w!! */
+	    printf("checking for writeable /tmp... ");
+	    fd = open("/tmp/tmp", O_WRONLY | O_CREAT, 0644);
+	    if (fd < 0) {
+		printf("no (probably a CD rooted install)\n");
+		roRoot = 1;
+	    } else {
+		close(fd);
+		unlink("/tmp/tmp");
+		printf("yes\n");
+	    }
+	}
+    }
+
+    if (!testing && roRoot) {
+	printf("creating 300k of ramdisk space... ");
+	if (doMke2fs("/dev/ram", "300"))
+	    fatal_error(0);
+
+	printf("done\n");
+	
+	printf("mounting /tmp from ramdisk... ");
+	if (mount("/dev/ram", "/tmp", "ext2", 0, NULL))
+	    fatal_error(1);
+
+	printf("done\n");
+
+	if (!nfsRoot) cdRoot = 1;
+    }
+
+    /* Now we have some /tmp space set up, and /etc and /dev point to
+       it. We should be in pretty good shape. */
+
+    if (!testing) 
+	doklog("/dev/tty4");
+
+    /* Go into normal init mode - keep going, and then do a orderly shutdown
+       when:
+
+	1) /bin/install exits
+	2) we receive a SIGHUP 
+    */
+
+    printf("running install...\n"); 
+
+    if (!(installpid = fork())) {
+	/* child */
+	if (!isSerial) {
+	    fd = open("/dev/tty1", O_RDWR, 0);
+	    if (fd < 0) {
+		printf("failed to open /dev/tty1");
+		fatal_error(1);
+	    }
+	    
+	    dup2(fd, 0);
+	    dup2(fd, 1);
+	    dup2(fd, 2);
+
+	    setsid();
+	    if (ioctl(0, TIOCSCTTY, NULL)) {
+		printf("could not set new controlling tty");
+	    }
+	    
+	    setsid();
+	    close(fd);
+	}
+	
+	if (0 && (nfsRoot || cdRoot)) {
+	    symlink("/", "/tmp/rhimage");
+	    symlink("/", "/tmp/image");
+
+	    *argvp++ = "/usr/bin/runinstall2";
+	    *argvp++ = argv[0];
+	    *argvp++ = "--method";
+	    *argvp++ = nfsRoot ? "nfs" : "cdrom";
+
+#if 0 /* we don't need this anymore */
+#	    if defined(__alpha__)
+		if (cdRoot && (kernel = findKernel())) {
+		    *argvp++ = "--kernel";
+		    *argvp++ = kernel;
+		} 
+#	    endif
+#endif /* not needed */
+	} else {
+	    *argvp++ = "/bin/loader";
+	}
+
+	if (isRescue) 
+	    *argvp++ = "--rescue";
+
+	if (isExpert) *argvp++ = "--expert";
+	if (forceSupp) *argvp++ = "--forcesupp";
+	if (isKick == KICK_FLOPPY) 
+	    *argvp++ = "--ks=floppy";
+	else if (isKick)
+	    *argvp++ = "--ks=bootp";
+
+#ifdef __i386__
+	if (isNetwork)
+	    *argvp++ = "--network";
+	else
+	    *argvp++ = "--local";
+#endif
+	
+	*argvp++ = NULL;
+
+	execve(argv[0], argv, environ);
+
+	exit(0);
+    }
+
+    while (!doShutdown) {
+	childpid = wait4(-1, &waitStatus, 0, NULL);
+
+	if (childpid == installpid) 
+	    doShutdown = 1;
+    }
+
+    if (!WIFEXITED(waitStatus) || WEXITSTATUS(waitStatus)) {
+	printf("install exited abnormally ");
+	if (WIFSIGNALED(waitStatus)) {
+	    printf("-- recieved signal %d", WTERMSIG(waitStatus));
+	}
+	printf("\n");
+    } else {
+	doReboot = 1;
+    }
+
+    if (testing)
+        exit(0);
+
+    sync(); sync();
+
+    if (!testing) {
+	printf("sending termination signals...");
+	kill(-1, 15);
+	sleep(2);
+	printf("done\n");
+
+	printf("sending kill signals...");
+	kill(-1, 9);
+	sleep(2);
+	printf("done\n");
+    }
+
+    printf("unmounting filesystems...\n"); 
+    unmountFilesystems();
+
+    if (doReboot) {
+	printf("rebooting system\n");
+	sleep(2);
+
+	#if USE_MINILIBC
+	    reboot(0xfee1dead, 672274793, 0x1234567);
+	#else
+	    reboot(RB_AUTOBOOT);
+	#endif
+    } else {
+	printf("you may safely reboot your system\n");
+	while (1);
+    }
+
+    exit(0);
+
+    return 0;
+}