diff options
Diffstat (limited to 'loader/init.c')
| -rw-r--r-- | loader/init.c | 832 |
1 files changed, 0 insertions, 832 deletions
diff --git a/loader/init.c b/loader/init.c deleted file mode 100644 index 8eaed3af2..000000000 --- a/loader/init.c +++ /dev/null @@ -1,832 +0,0 @@ -/* - * init.c - * - * This is the install type init - * - * Erik Troan (ewt@redhat.com) - * - * Copyright 1996 - 2002 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" -#ifndef SOCK_STREAM -# define SOCK_STREAM 1 -#endif -#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> - -/* Need to tell loop.h what the actual dev_t type is. */ -#undef dev_t -#if defined(__alpha) || (defined(__sparc__) && defined(__arch64__)) -#define dev_t unsigned int -#else -#define dev_t unsigned short -#endif -#include <linux/loop.h> -#undef dev_t -#define dev_t dev_t - -#define syslog klogctl -#endif - -struct unmountInfo { - char * name; - int mounted; - int loopDevice; - enum { FS, LOOP } what; -} ; - -#include <linux/cdrom.h> - -#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 * env[] = { - "PATH=/usr/bin:/bin:/sbin:/usr/sbin:/mnt/sysimage/bin:" - "/mnt/sysimage/usr/bin:/mnt/sysimage/usr/sbin:/mnt/sysimage/sbin", - /* we set a nicer ld library path specifically for bash -- a full - one makes anaconda unhappy */ - "LD_LIBRARY_PATH=/lib:/usr/lib:/usr/X11R6/lib", - "HOME=/", - "TERM=linux", - "DEBUG=", - "TERMINFO=/etc/linux-terminfo", - "PYTHONPATH=/tmp/updates", - 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=0; - -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"); - if (testing) exit(0); -#if !defined(__s390__) && !defined(__s390x__) - while (1) ; -#endif -} - -int doMke2fs(char * device, char * size) { - char * args[] = { "/usr/sbin/mke2fs", NULL, NULL, NULL }; - int pid, status; - - args[1] = device; - args[2] = size; - - if (!(pid = fork())) { - /* child */ - execve("/usr/sbin/mke2fs", args, env); - 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); - } - } - } -} - -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); - } - - env[ENV_TERM] = "TERM=vt100"; - - return 0; -} - -void undoLoop(struct unmountInfo * fs, int numFs, int this); - -void undoMount(struct unmountInfo * fs, int numFs, int this) { - int len = strlen(fs[this].name); - int i; - - if (!fs[this].mounted) return; - fs[this].mounted = 0; - - /* unmount everything underneath this */ - for (i = 0; i < numFs; i++) { - if (fs[i].name[len] == '/' && - !strncmp(fs[this].name, fs[i].name, len)) { - if (fs[i].what == LOOP) - undoLoop(fs, numFs, i); - else - undoMount(fs, numFs, i); - } - } - - printf("\t%s", fs[this].name); - /* don't need to unmount /tmp. it is busy anyway. */ - if (!testing) { - if (umount2(fs[this].name, 0) < 0) { - printf(" umount failed (%d)", errno); - } else { - printf(" done"); - } - } - printf("\n"); -} - -void undoLoop(struct unmountInfo * fs, int numFs, int this) { - int i; - int fd; - - if (!fs[this].mounted) return; - fs[this].mounted = 0; - - /* find the device mount */ - for (i = 0; i < numFs; i++) { - if (fs[i].what == FS && (fs[i].loopDevice == fs[this].loopDevice)) - break; - } - - if (i < numFs) { - /* the device is mounted, unmount it (and recursively, anything - * underneath) */ - undoMount(fs, numFs, i); - } - - unlink("/tmp/loop"); - mknod("/tmp/loop", 0600 | S_IFBLK, (7 << 8) | fs[this].loopDevice); - printf("\tdisabling /dev/loop%d", fs[this].loopDevice); - if ((fd = open("/tmp/loop", O_RDONLY, 0)) < 0) { - printf(" failed to open device: %d", errno); - } else { - if (!testing && ioctl(fd, LOOP_CLR_FD, 0)) - printf(" LOOP_CLR_FD failed: %d", errno); - close(fd); - } - - printf("\n"); -} - -void unmountFilesystems(void) { - int fd, size; - char buf[65535]; /* this should be big enough */ - char * chptr, * start; - struct unmountInfo filesystems[500]; - int numFilesystems = 0; - int i; - struct loop_info li; - char * device; - struct stat sb; - - 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) { - device = chptr; - while (*chptr != ' ') chptr++; - *chptr++ = '\0'; - start = chptr; - while (*chptr != ' ') chptr++; - *chptr++ = '\0'; - - if (strcmp(start, "/") && strcmp(start, "/tmp")) { - filesystems[numFilesystems].name = alloca(strlen(start) + 1); - strcpy(filesystems[numFilesystems].name, start); - filesystems[numFilesystems].what = FS; - filesystems[numFilesystems].mounted = 1; - - stat(start, &sb); - if ((sb.st_dev >> 8) == 7) { - filesystems[numFilesystems].loopDevice = sb.st_dev & 0xf; - } else { - filesystems[numFilesystems].loopDevice = -1; - } - - numFilesystems++; - } - - while (*chptr != '\n') chptr++; - chptr++; - } - - for (i = 0; i < 7; i++) { - unlink("/tmp/loop"); - mknod("/tmp/loop", 0600 | S_IFBLK, (7 << 8) | i); - if ((fd = open("/tmp/loop", O_RDONLY, 0)) >= 0) { - if (!ioctl(fd, LOOP_GET_STATUS, &li) && li.lo_name[0]) { - filesystems[numFilesystems].name = alloca(strlen(li.lo_name) - + 1); - strcpy(filesystems[numFilesystems].name, li.lo_name); - filesystems[numFilesystems].what = LOOP; - filesystems[numFilesystems].mounted = 1; - filesystems[numFilesystems].loopDevice = i; - numFilesystems++; - } - - close(fd); - } - } - - for (i = 0; i < numFilesystems; i++) { - if (filesystems[i].what == LOOP) { - undoLoop(filesystems, numFilesystems, i); - } - } - - for (i = 0; i < numFilesystems; i++) { - if (filesystems[i].mounted) { - undoMount(filesystems, numFilesystems, i); - } - } -} - -void disableSwap(void) { - int fd; - char buf[4096]; - int i; - char * start; - char * chptr; - - if ((fd = open("/proc/swaps", O_RDONLY, 0)) < 0) return; - - i = read(fd, buf, sizeof(buf) - 1); - close(fd); - if (i < 0) return; - buf[i] = '\0'; - - start = buf; - while (*start) { - while (*start != '\n' && *start) start++; - if (!*start) return; - - start++; - if (*start != '/') return; - chptr = start; - while (*chptr && *chptr != ' ') chptr++; - if (!(*chptr)) return; - *chptr = '\0'; - printf("\t%s", start); - if (swapoff(start)) - printf(" failed (%d)", errno); - printf("\n"); - - start = chptr + 1; - } -} - -void ejectCdrom(void) { - int ejectfd; - struct stat sb; - - stat("/tmp/cdrom", &sb); - - if ((sb.st_mode & S_IFBLK) == S_IFBLK) { - printf("ejecting /tmp/cdrom..."); - if ((ejectfd = open("/tmp/cdrom", O_RDONLY | O_NONBLOCK, 0)) >= 0) { - if (ioctl(ejectfd, CDROMEJECT, 0)) - printf("eject failed %d ", errno); - close(ejectfd); - } else { - printf("eject failed %d ", errno); - } - printf("\n"); - } -} - -int mystrstr(char *str1, char *str2) { - char *p; - int rc=0; - - for (p=str1; *p; p++) { - if (*p == *str2) { - char *s, *t; - - rc = 1; - for (s=p, t=str2; *s && *t; s++, t++) - if (*s != *t) { - rc = 0; - p++; - } - - if (rc) - return rc; - } - } - return rc; -} - - - -int main(int argc, char **argv) { - pid_t installpid, childpid; - int waitStatus; - int fd; - int nfsRoot = 0; - int roRoot = 0; - int cdRoot = 0; - int doReboot = 0; - int doShutdown =0; - int isSerial = 0; - int noKill = 0; -#ifdef __alpha__ - char * kernel; -#endif - char * argvc[15]; - char ** argvp = argvc; - char twelve = 12; - int i; - char buf[500]; - int len; - - -#if !defined(__s390__) && !defined(__s390x__) - testing = (getppid() != 0) && (getppid() != 1); -#endif - - if (!testing) { - /* turn off screen blanking */ - printstr("\033[9;0]"); - printstr("\033[8]"); - } else { - printstr("(running in test mode).\n"); - } - -#if 0 - printf("unmounting filesystems...\n"); - unmountFilesystems(); - exit(0); -#endif - - umask(022); - - printstr("Greetings.\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"); - - printf("mounting /dev/pts (unix98 pty) filesystem... "); - if (!testing) { - if (mount("/dev/pts", "/dev/pts", "devpts", 0, NULL)) - fatal_error(1); - } - printf("done\n"); - - signal(SIGINT, SIG_IGN); - signal(SIGTSTP, SIG_IGN); - - /* these args are only for testing from commandline */ - for (i = 1; i < argc; i++) - if (!strcmp (argv[i], "serial")) { - isSerial = 1; - break; - } - - /* look through /proc/cmdline for special options */ - if ((fd = open("/proc/cmdline", O_RDONLY,0)) > 0) { - len = read(fd, buf, sizeof(buf) - 1); - close(fd); - if (len > 0 && mystrstr(buf, "nokill")) - noKill = 1; - } - -#if !defined(__s390__) && !defined(__s390x__) - if (ioctl (0, TIOCLINUX, &twelve) < 0) - isSerial = 2; - - if (isSerial) { - char *device = "/dev/ttyS0"; - - 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"); - - if (isSerial == 2) - device = "/dev/console"; - fd = open(device, O_RDWR, 0); - if (fd < 0) - device = "/dev/tts/0"; - - if (fd < 0) { - printf("failed to open %s\n", device); - fatal_error(1); - } - - setupTerminal(fd); - } else { - fd = open("/dev/tty1", O_RDWR, 0); - if (fd < 0) - fd = open("/dev/vc/1", O_RDWR, 0); - - if (fd < 0) { - printf("failed to open /dev/tty1 and /dev/vc/1"); - fatal_error(1); - } - } - - if (testing) - exit(0); - - dup2(fd, 0); - dup2(fd, 1); - dup2(fd, 2); - close(fd); -#endif - - setsid(); - if (ioctl(0, TIOCSCTTY, NULL)) { - printf("could not set new controlling tty\n"); - } - - 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("/", "/", "ext2", 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 !defined(__s390__) && !defined(__s390x__) -#define RAMDISK_DEVICE "/dev/ram" -#else -#define RAMDISK_DEVICE "/dev/ram2" -#endif - - if (!testing && roRoot) { - printf("creating 300k of ramdisk space... "); - if (doMke2fs(RAMDISK_DEVICE, "300")) - fatal_error(0); - - printf("done\n"); - - printf("mounting /tmp from ramdisk... "); - if (mount(RAMDISK_DEVICE, "/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"); - - setsid(); - - if (!(installpid = fork())) { - /* child */ - *argvp++ = "/sbin/loader"; - *argvp++ = NULL; - - printf("running %s\n", argvc[0]); - execve(argvc[0], argvc, env); - - 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("-- received signal %d", WTERMSIG(waitStatus)); - } - printf("\n"); - } else { - doReboot = 1; - } - - if (testing) - exit(0); - - sync(); sync(); - - if (!testing && !noKill) { - 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("disabling swap...\n"); - disableSwap(); - - printf("unmounting filesystems...\n"); - unmountFilesystems(); - - ejectCdrom(); - - if (doReboot) { - printf("rebooting system\n"); - sleep(2); - -#if USE_MINILIBC - reboot(0xfee1dead, 672274793, 0x1234567); -#else -# ifdef __alpha__ - reboot(RB_HALT_SYSTEM); -# else - reboot(RB_AUTOBOOT); -# endif -#endif - } else { - printf("you may safely reboot your system\n"); - while (1); - } - - exit(0); - - return 0; -} |