+++ /dev/null
-/*
- * nash.c
- *
- * Simple code to load modules, mount root, and get things going. Uses
- * dietlibc to keep things small.
- *
- * Erik Troan (ewt@redhat.com)
- * Jeremy Katz (katzj@redhat.com)
- * Peter Jones (pjones@redhat.com)
- *
- * Copyright 2002-2005 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.
- *
- */
-
-/* We internalize losetup, mount, raidautorun, and echo commands. Other
- commands are run from the filesystem. Comments and blank lines work as
- well, argument parsing is screwy. */
-
-#include <ctype.h>
-#include <dirent.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/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>
-
-#include <asm/unistd.h>
-
-#include "mount_by_label.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
-
-#include <linux/cdrom.h>
-#define MD_MAJOR 9
-#include <linux/raid/md_u.h>
-
-#ifndef RAID_AUTORUN
-#define RAID_AUTORUN _IO (MD_MAJOR, 0x14)
-#endif
-
-#ifndef MS_REMOUNT
-#define MS_REMOUNT 32
-#endif
-
-#ifndef MS_BIND
-#define MS_BIND 4096
-#endif
-
-#ifndef MS_MOVE
-#define MS_MOVE 8192
-#endif
-
-#ifndef MNT_FORCE
-#define MNT_FORCE 0x1
-#endif
-
-#ifndef MNT_DETACH
-#define MNT_DETACH 0x2
-#endif
-
-extern dev_t name_to_dev_t(char *name);
-extern int display_uuid_cache(void);
-
-#define MAX(a, b) ((a) > (b) ? a : b)
-
-int testing = 0, quiet = 0, reallyquiet = 0;
-
-#define PATH "/usr/bin:/bin:/sbin:/usr/sbin"
-
-char * env[] = {
- "PATH=" PATH,
- "LVM_SUPPRESS_FD_WARNINGS=1",
- NULL
-};
-
-int smartmknod(char * device, mode_t mode, dev_t dev) {
- char buf[256];
- char * end;
-
- strncpy(buf, device, 256);
-
- end = buf;
- while (*end) {
- if (*end == '/') {
- *end = '\0';
- if (access(buf, F_OK) && errno == ENOENT)
- mkdir(buf, 0755);
- *end = '/';
- }
-
- end++;
- }
-
- return mknod(device, mode, dev);
-}
-
-char * getArg(char * cmd, char * end, char ** arg) {
- char quote = '\0';
-
- if (!cmd || cmd >= end) return NULL;
-
- while (isspace(*cmd) && cmd < end) cmd++;
- if (cmd >= end) return NULL;
-
- if (*cmd == '"')
- cmd++, quote = '"';
- else if (*cmd == '\'')
- cmd++, quote = '\'';
-
- if (quote) {
- *arg = cmd;
-
- /* This doesn't support \ escapes */
- while (cmd < end && *cmd != quote) cmd++;
-
- if (cmd == end) {
- printf("error: quote mismatch for %s\n", *arg);
- return NULL;
- }
-
- *cmd = '\0';
- cmd++;
- } else {
- *arg = cmd;
- while (!isspace(*cmd) && cmd < end) cmd++;
- *cmd = '\0';
- if (**arg == '$')
- *arg = getenv(*arg+1);
- if (*arg == NULL)
- *arg = "";
- }
-
- cmd++;
-
- while (isspace(*cmd)) cmd++;
-
- return cmd;
-}
-
-/* taken from anaconda/isys/probe.c */
-static int readFD (int fd, char **buf)
-{
- char *p;
- size_t size = 4096;
- int s, filesize;
-
- *buf = malloc (size);
- if (*buf == 0)
- return -1;
-
- filesize = 0;
- do {
- p = &(*buf) [filesize];
- s = read (fd, p, 4096);
- if (s < 0)
- break;
- filesize += s;
- if (s != 4096)
- break;
- size += 4096;
- *buf = realloc (*buf, size);
- } while (1);
-
- if (filesize == 0 && s < 0) {
- free (*buf);
- *buf = NULL;
- return -1;
- }
-
- return filesize;
-}
-
-#ifdef __powerpc__
-#define CMDLINESIZE 256
-#else
-#define CMDLINESIZE 1024
-#endif
-
-/* get the contents of the kernel command line from /proc/cmdline */
-static char * getKernelCmdLine(void) {
- int fd, i;
- char * buf;
-
- fd = open("/proc/cmdline", O_RDONLY, 0);
- if (fd < 0) {
- printf("getKernelCmdLine: failed to open /proc/cmdline: %d\n", errno);
- return NULL;
- }
-
- buf = malloc(CMDLINESIZE);
- if (!buf)
- return buf;
-
- i = read(fd, buf, CMDLINESIZE);
- if (i < 0) {
- printf("getKernelCmdLine: failed to read /proc/cmdline: %d\n", errno);
- close(fd);
- return NULL;
- }
-
- close(fd);
- if (i == 0)
- buf[0] = '\0';
- else
- buf[i - 1] = '\0';
- return buf;
-}
-
-/* get the start of a kernel arg "arg". returns everything after it
- * (useful for things like getting the args to init=). so if you only
- * want one arg, you need to terminate it at the n */
-static char * getKernelArg(char * arg) {
- char * start, * cmdline;
-
- cmdline = start = getKernelCmdLine();
- if (start == NULL) return NULL;
- while (*start) {
- if (isspace(*start)) {
- start++;
- continue;
- }
- if (strncmp(start, arg, strlen(arg)) == 0) {
- return start + strlen(arg);
- }
- while (*++start && !isspace(*start))
- ;
- }
-
- return NULL;
-}
-
-int mountCommand(char * cmd, char * end) {
- char * fsType = NULL;
- char * device;
- char * mntPoint;
- char * deviceDir = NULL;
- char * options = NULL;
- int mustRemove = 0;
- int mustRemoveDir = 0;
- int rc = 0;
- int flags = MS_MGC_VAL;
- char * newOpts;
-
- cmd = getArg(cmd, end, &device);
- if (!cmd) {
- printf("usage: mount [--ro] [-o <opts>] -t <type> <device> <mntpoint>\n");
- return 1;
- }
-
- while (cmd && *device == '-') {
- if (!strcmp(device, "--ro")) {
- flags |= MS_RDONLY;
- } else if (!strcmp(device, "--bind")) {
- flags = MS_BIND;
- fsType = "none";
- } else if (!strcmp(device, "-o")) {
- cmd = getArg(cmd, end, &options);
- if (!cmd) {
- printf("mount: -o requires arguments\n");
- return 1;
- }
- } else if (!strcmp(device, "-t")) {
- if (!(cmd = getArg(cmd, end, &fsType))) {
- printf("mount: missing filesystem type\n");
- return 1;
- }
- }
-
- cmd = getArg(cmd, end, &device);
- }
-
- if (!cmd) {
- printf("mount: missing device\n");
- return 1;
- }
-
- if (!(cmd = getArg(cmd, end, &mntPoint))) {
- printf("mount: missing mount point\n");
- return 1;
- }
-
- if (!fsType) {
- printf("mount: filesystem type expected\n");
- return 1;
- }
-
- if (cmd < end) {
- printf("mount: unexpected arguments\n");
- return 1;
- }
-
- /* need to deal with options */
- if (options) {
- char * end;
- char * start = options;
-
- newOpts = alloca(strlen(options) + 1);
- *newOpts = '\0';
-
- while (*start) {
- end = strchr(start, ',');
- if (!end) {
- end = start + strlen(start);
- } else {
- *end = '\0';
- end++;
- }
-
- if (!strcmp(start, "ro"))
- flags |= MS_RDONLY;
- else if (!strcmp(start, "rw"))
- flags &= ~MS_RDONLY;
- else if (!strcmp(start, "nosuid"))
- flags |= MS_NOSUID;
- else if (!strcmp(start, "suid"))
- flags &= ~MS_NOSUID;
- else if (!strcmp(start, "nodev"))
- flags |= MS_NODEV;
- else if (!strcmp(start, "dev"))
- flags &= ~MS_NODEV;
- else if (!strcmp(start, "noexec"))
- flags |= MS_NOEXEC;
- else if (!strcmp(start, "exec"))
- flags &= ~MS_NOEXEC;
- else if (!strcmp(start, "sync"))
- flags |= MS_SYNCHRONOUS;
- else if (!strcmp(start, "async"))
- flags &= ~MS_SYNCHRONOUS;
- else if (!strcmp(start, "nodiratime"))
- flags |= MS_NODIRATIME;
- else if (!strcmp(start, "diratime"))
- flags &= ~MS_NODIRATIME;
- else if (!strcmp(start, "noatime"))
- flags |= MS_NOATIME;
- else if (!strcmp(start, "atime"))
- flags &= ~MS_NOATIME;
- else if (!strcmp(start, "remount"))
- flags |= MS_REMOUNT;
- else if (!strcmp(start, "defaults"))
- ;
- else {
- if (*newOpts)
- strcat(newOpts, ",");
- strcat(newOpts, start);
- }
-
- start = end;
- }
-
- options = newOpts;
- }
-
- if (!strncmp("LABEL=", device, 6)) {
- int major, minor;
- char * devName;
- char * ptr;
- int i;
-
- devName = get_spec_by_volume_label(device + 6, &major, &minor);
-
- if (devName) {
- device = devName;
- if (access(device, F_OK)) {
- ptr = device;
- i = 0;
- while (*ptr)
- if (*ptr++ == '/')
- i++;
- if (i > 2) {
- deviceDir = alloca(strlen(device) + 1);
- strcpy(deviceDir, device);
- ptr = deviceDir + (strlen(device) - 1);
- while (*ptr != '/')
- *ptr-- = '\0';
- if (mkdir(deviceDir, 0644)) {
- printf("mkdir: cannot create directory %s\n", deviceDir);
- } else {
- mustRemoveDir = 1;
- }
- }
- if (smartmknod(device, S_IFBLK | 0600, makedev(major, minor))) {
- printf("mount: cannot create device %s (%d,%d)\n",
- device, major, minor);
- return 1;
- }
- mustRemove = 1;
- }
- }
- }
-
- if (testing) {
- printf("mount %s%s%s-t '%s' '%s' '%s' (%s%s%s%s%s%s%s)\n",
- options ? "-o '" : "",
- options ? options : "",
- options ? "\' " : "",
- fsType, device, mntPoint,
- (flags & MS_RDONLY) ? "ro " : "",
- (flags & MS_NOSUID) ? "nosuid " : "",
- (flags & MS_NODEV) ? "nodev " : "",
- (flags & MS_NOEXEC) ? "noexec " : "",
- (flags & MS_SYNCHRONOUS) ? "sync " : "",
- (flags & MS_REMOUNT) ? "remount " : "",
- (flags & MS_NOATIME) ? "noatime " : ""
- );
- } else {
- if (mount(device, mntPoint, fsType, flags, options)) {
- printf("mount: error %d mounting %s\n", errno, fsType);
- rc = 1;
- }
- }
-
- if (mustRemove) unlink(device);
- if (mustRemoveDir) rmdir(deviceDir);
-
- return rc;
-}
-
-int otherCommand(char * bin, char * cmd, char * end, int doFork) {
- char ** args;
- char ** nextArg;
- int pid, wpid;
- int status;
- char fullPath[255];
- static const char * sysPath = PATH;
- const char * pathStart;
- const char * pathEnd;
- char * stdoutFile = NULL;
- int stdoutFd = 0;
-
- args = (char **)malloc(sizeof(char *) * 128);
- if (!args)
- return 1;
- nextArg = args;
-
- if (!strchr(bin, '/')) {
- pathStart = sysPath;
- while (*pathStart) {
- pathEnd = strchr(pathStart, ':');
-
- if (!pathEnd) pathEnd = pathStart + strlen(pathStart);
-
- strncpy(fullPath, pathStart, pathEnd - pathStart);
- fullPath[pathEnd - pathStart] = '/';
- strcpy(fullPath + (pathEnd - pathStart + 1), bin);
-
- pathStart = pathEnd;
- if (*pathStart) pathStart++;
-
- if (!access(fullPath, X_OK)) {
- bin = fullPath;
- break;
- }
- }
- }
-
- *nextArg = strdup(bin);
-
- while (cmd && cmd < end) {
- nextArg++;
- cmd = getArg(cmd, end, nextArg);
- }
-
- if (cmd) nextArg++;
- *nextArg = NULL;
-
- /* if the next-to-last arg is a >, redirect the output properly */
- if (((nextArg - args) >= 2) && !strcmp(*(nextArg - 2), ">")) {
- stdoutFile = *(nextArg - 1);
- *(nextArg - 2) = NULL;
-
- stdoutFd = open(stdoutFile, O_CREAT | O_RDWR | O_TRUNC, 0600);
- if (stdoutFd < 0) {
- printf("nash: failed to open %s: %d\n", stdoutFile, errno);
- return 1;
- }
- }
-
- if (testing) {
- printf("%s ", bin);
- nextArg = args + 1;
- while (*nextArg)
- printf(" '%s'", *nextArg++);
- if (stdoutFile)
- printf(" (> %s)", stdoutFile);
- printf("\n");
- } else {
- if (!doFork || !(pid = fork())) {
- /* child */
- dup2(stdoutFd, 1);
- execve(args[0], args, env);
- printf("ERROR: failed in exec of %s\n", args[0]);
- return 1;
- }
-
- close(stdoutFd);
-
- for (;;) {
- wpid = wait4(-1, &status, 0, NULL);
- if (wpid == -1) {
- printf("ERROR: Failed to wait for process %d\n", wpid);
- }
-
- if (wpid != pid)
- continue;
-
- if (!WIFEXITED(status) || WEXITSTATUS(status)) {
- printf("ERROR: %s exited abnormally with value %d ! (pid %d)\n", args[0], WEXITSTATUS(status), pid);
- return 1;
- }
- break;
- }
- }
-
- return 0;
-}
-
-#ifdef DEBUG
-static int lsdir(char *thedir, char * prefix) {
- DIR * dir;
- struct dirent * entry;
- struct stat sb;
- char * fn;
-
- if (!(dir = opendir(thedir))) {
- printf("error opening %s: %d\n", thedir, errno);
- return 1;
- }
-
- fn = malloc(1024);
- while ((entry = readdir(dir))) {
- if (entry->d_name[0] == '.')
- continue;
- snprintf(fn, 1024, "%s/%s", thedir, entry->d_name);
- stat(fn, &sb);
- printf("%s%s", prefix, fn);
-
- if (S_ISDIR(sb.st_mode)) {
- char * pfx;
- pfx = malloc(strlen(prefix) + 3);
- sprintf(pfx, "%s ", prefix);
- printf("/\n");
- } else if (S_ISCHR(sb.st_mode)) {
- printf(" c %d %d\n", major(sb.st_rdev), minor(sb.st_rdev));
- } else if (S_ISBLK(sb.st_mode)) {
- printf(" b %d %d\n", major(sb.st_rdev), minor(sb.st_rdev));
- } else if (S_ISLNK(sb.st_mode)) {
- char * target;
- target = malloc(1024);
- readlink(fn, target, 1024);
- printf("->%s\n", target);
- free(target);
- } else {
- printf("\n");
- }
- }
- return 0;
-}
-
-int catCommand(char * cmd, char * end) {
- char * file;
- char * buf;
- int fd;
-
- if (!(cmd = getArg(cmd, end, &file))) {
- printf("cat: argument expected\n");
- return 1;
- }
-
- if ((fd = open(file, O_RDONLY)) < 0) {
- printf("cat: error opening %s: %d\n", file, errno);
- return 1;
- }
-
- buf = malloc(1024);
- while (read(fd, buf, 1024) > 0) {
- write(1, buf, 1024);
- }
- return 0;
-}
-
-int lsCommand(char * cmd, char * end) {
- char * dir;
-
- if (!(cmd = getArg(cmd, end, &dir))) {
- printf("ls: argument expected\n");
- return 1;
- }
-
- lsdir(dir, "");
- return 0;
-}
-#endif
-
-int execCommand(char * cmd, char * end) {
- char * bin;
-
- if (!(cmd = getArg(cmd, end, &bin))) {
- printf("exec: argument expected\n");
- return 1;
- }
-
- return otherCommand(bin, cmd, end, 0);
-}
-
-int losetupCommand(char * cmd, char * end) {
- char * device;
- char * file;
- int fd;
- struct loop_info loopInfo;
- int dev;
-
- if (!(cmd = getArg(cmd, end, &device))) {
- printf("losetup: missing device\n");
- return 1;
- }
-
- if (!(cmd = getArg(cmd, end, &file))) {
- printf("losetup: missing file\n");
- return 1;
- }
-
- if (cmd < end) {
- printf("losetup: unexpected arguments\n");
- return 1;
- }
-
- if (testing) {
- printf("losetup '%s' '%s'\n", device, file);
- } else {
- dev = open(device, O_RDWR, 0);
- if (dev < 0) {
- printf("losetup: failed to open %s: %d\n", device, errno);
- return 1;
- }
-
- fd = open(file, O_RDWR, 0);
- if (fd < 0) {
- printf("losetup: failed to open %s: %d\n", file, errno);
- close(dev);
- return 1;
- }
-
- if (ioctl(dev, LOOP_SET_FD, (long) fd)) {
- printf("losetup: LOOP_SET_FD failed: %d\n", errno);
- close(dev);
- close(fd);
- return 1;
- }
-
- close(fd);
-
- memset(&loopInfo, 0, sizeof(loopInfo));
- strcpy(loopInfo.lo_name, file);
-
- if (ioctl(dev, LOOP_SET_STATUS, &loopInfo))
- printf("losetup: LOOP_SET_STATUS failed: %d\n", errno);
-
- close(dev);
- }
-
- return 0;
-}
-
-#define RAID_MAJOR 9
-int raidautorunCommand(char * cmd, char * end) {
- char * device;
- int fd;
-
- if (!(cmd = getArg(cmd, end, &device))) {
- printf("raidautorun: raid device expected as first argument\n");
- return 1;
- }
-
- if (cmd < end) {
- printf("raidautorun: unexpected arguments\n");
- return 1;
- }
-
- /* with udev, the raid devices don't exist until they get started.
- * this won't work so well with raidautorun. so, let's be smart
- * and create them ourselves if we need to */
- if (access(device, R_OK & W_OK)) {
- int minor;
- if (sscanf(device, "/dev/md%d", &minor) != 1) {
- printf("raidautorun: unable to autocreate %s\n", device);
- return 1;
- }
-
- if (smartmknod(device, S_IFBLK | 0600, makedev(RAID_MAJOR, minor))) {
- printf("raidautorun: unable to autocreate %s\n", device);
- return 1;
- }
- }
-
- fd = open(device, O_RDWR, 0);
- if (fd < 0) {
- printf("raidautorun: failed to open %s: %d\n", device, errno);
- return 1;
- }
-
- if (ioctl(fd, RAID_AUTORUN, 0)) {
- printf("raidautorun: RAID_AUTORUN failed: %d\n", errno);
- close(fd);
- return 1;
- }
-
- close(fd);
- return 0;
-}
-
-#ifdef USE_DIET
-extern int pivot_root(char *, char *);
-#endif
-
-static int my_pivot_root(char * one, char * two) {
-#ifdef USE_DIET
- return pivot_root(one, two);
-#else
- return syscall(__NR_pivot_root, one, two);
-#endif
-}
-
-int pivotrootCommand(char * cmd, char * end) {
- char * new;
- char * old;
-
- if (!(cmd = getArg(cmd, end, &new))) {
- printf("pivotroot: new root mount point expected\n");
- return 1;
- }
-
- if (!(cmd = getArg(cmd, end, &old))) {
- printf("pivotroot: old root mount point expected\n");
- return 1;
- }
-
- if (cmd < end) {
- printf("pivotroot: unexpected arguments\n");
- return 1;
- }
-
- if (my_pivot_root(new, old)) {
- printf("pivotroot: pivot_root(%s,%s) failed: %d\n", new, old, errno);
- return 1;
- }
-
- return 0;
-}
-
-#define MAX_INIT_ARGS 32
-/* 2.6 magic not-pivot-root but kind of similar stuff.
- * This is based on code from klibc/utils/run_init.c
- */
-int switchrootCommand(char * cmd, char * end) {
- char * new;
- const char * initprogs[] = { "/sbin/init", "/etc/init",
- "/bin/init", "/bin/sh", NULL };
- char * init, * cmdline = NULL;
- char ** initargs;
- /* Don't try to unmount the old "/", there's no way to do it. */
- const char * umounts[] = { "/dev", "/proc", "/sys", NULL };
- int fd, i = 0;
- int moveDev = 0;
-
- cmd = getArg(cmd, end, &new);
- if (cmd) {
- if (!strcmp(new, "--movedev"))
- moveDev = 1;
- cmd = getArg(cmd, end, &new);
- }
-
- if (!cmd) {
- printf("switchroot: new root mount point expected\n");
- return 1;
- }
-
- if (chdir(new)) {
- printf("switchroot: chdir(%s) failed: %d\n", new, errno);
- return 1;
- }
-
- init = getKernelArg("init=");
- if (init == NULL)
- cmdline = getKernelCmdLine();
-
- if (moveDev) {
- i = 1;
- mount("/dev", "./dev", NULL, MS_MOVE, NULL);
- }
-
- if ((fd = open("./dev/console", O_RDWR)) < 0) {
- printf("ERROR opening /dev/console!!!!: %d\n", errno);
- fd = 0;
- }
-
- if (dup2(fd, 0) != 0) printf("error dup2'ing fd of %d to 0\n", fd);
- if (dup2(fd, 1) != 1) printf("error dup2'ing fd of %d to 1\n", fd);
- if (dup2(fd, 2) != 2) printf("error dup2'ing fd of %d to 2\n", fd);
- if (fd > 2)
- close(fd);
-
- fd = open("/", O_RDONLY);
- for (; umounts[i] != NULL; i++) {
- if (!quiet) printf("unmounting old %s\n", umounts[i]);
- if (umount2(umounts[i], MNT_DETACH)) {
- printf("ERROR unmounting old %s: %d\n", umounts[i], errno);
- printf("forcing unmount of %s\n", umounts[i]);
- umount2(umounts[i], MNT_FORCE);
- }
- }
- i=0;
-
- if (mount(".", "/", NULL, MS_MOVE, NULL)) {
- printf("switchroot: mount failed: %d\n", errno);
- close(fd);
- return 1;
- }
-
- if (chroot(".") || chdir("/")) {
- printf("switchroot: chroot() failed: %d\n", errno);
- close(fd);
- return 1;
- }
-
- /* release the old "/" */
- close(fd);
-
- if (init == NULL) {
- int j;
- for (j = 0; initprogs[j] != NULL; j++) {
- if (!access(initprogs[j], X_OK)) {
- init = strdup(initprogs[j]);
- break;
- }
- }
- }
-
- initargs = (char **)malloc(sizeof(char *)*(MAX_INIT_ARGS+1));
- if (cmdline && init) {
- initargs[i++] = strdup(init);
- } else {
- cmdline = init;
- initargs[0] = NULL;
- }
-
- if (cmdline != NULL) {
- char * chptr, * start;
-
- start = chptr = cmdline;
- for (; (i < MAX_INIT_ARGS) && (*start != '\0'); i++) {
- while (*chptr && !isspace(*chptr)) chptr++;
- if (*chptr != '\0') *(chptr++) = '\0';
- initargs[i] = strdup(start);
- start = chptr;
- }
- }
-
- initargs[i] = NULL;
-
- if (access(initargs[0], X_OK)) {
- printf("WARNING: can't access %s\n", initargs[0]);
- }
- execv(initargs[0], initargs);
- printf("exec of init (%s) failed!!!: %d\n", initargs[0], errno);
- return 1;
-}
-
-int isEchoQuiet(int fd) {
- if (!reallyquiet) return 0;
- if (fd != 1) return 0;
- return 1;
-}
-
-int echoCommand(char * cmd, char * end) {
- char * args[256];
- char ** nextArg = args;
- int outFd = 1;
- int num = 0;
- int i;
- int newline = 1;
- int length = 0;
- char *string;
-
- if (testing && !quiet) {
- printf("(echo) ");
- fflush(stdout);
- }
-
- while ((cmd = getArg(cmd, end, nextArg))) {
- if (!strncmp("-n", *nextArg, MAX(2, strlen(*nextArg)))) {
- newline = 0;
- } else {
- length += strlen(*nextArg);
- nextArg++, num++;
- }
- }
- length += num + 1;
-
- if ((nextArg - args >= 2) && !strcmp(*(nextArg - 2), ">")) {
- outFd = open(*(nextArg - 1), O_WRONLY | O_CREAT | O_TRUNC, 0644);
- if (outFd < 0) {
- printf("echo: cannot open %s for write: %d\n",
- *(nextArg - 1), errno);
- return 1;
- }
-
- newline = 0;
- num -= 2;
- }
- string = (char *)malloc(length * sizeof(char));
- *string = '\0';
- for (i = 0; i < num;i ++) {
- if (i) strcat(string, " ");
- strncat(string, args[i], strlen(args[i]));
- }
-
- if (newline) strcat(string, "\n");
- if (!isEchoQuiet(outFd)) write(outFd, string, strlen(string));
-
- if (outFd != 1) close(outFd);
- free(string);
-
- return 0;
-}
-
-int umountCommand(char * cmd, char * end) {
- char * path;
-
- if (!(cmd = getArg(cmd, end, &path))) {
- printf("umount: path expected\n");
- return 1;
- }
-
- if (cmd < end) {
- printf("umount: unexpected arguments\n");
- return 1;
- }
-
- if (umount(path)) {
- printf("umount %s failed: %d\n", path, errno);
- return 1;
- }
-
- return 0;
-}
-
-int mkrootdevCommand(char * cmd, char * end) {
- char * path;
- char *root, * chptr;
- int devNum = 0;
- int fd;
- int i;
- char buf[1024];
- int major, minor;
-
- if (!(cmd = getArg(cmd, end, &path))) {
- printf("mkrootdev: path expected\n");
- return 1;
- }
-
- if (cmd < end) {
- printf("mkrootdev: unexpected arguments\n");
- return 1;
- }
-
- root = getKernelArg("root=");
-
- if (root) {
- chptr = root;
- while (*chptr && !isspace(*chptr)) chptr++;
- *chptr = '\0';
- }
-
- if (root && !access(root, R_OK)) {
- if (!symlink(root, "/dev/root"))
- return 0;
- }
-
- if (root && !strncmp(root, "LABEL=", 6)) {
- if (get_spec_by_volume_label(root + 6, &major, &minor)) {
- if (smartmknod(path, S_IFBLK | 0600, makedev(major, minor))) {
- printf("mount: cannot create device %s (%d,%d)\n",
- path, major, minor);
- return 1;
- }
-
- return 0;
- }
-
- printf("mkrootdev: label %s not found\n", root + 6);
-
- return 1;
- }
-
- if (root && !strncmp(root, "UUID=", 5)) {
- if (get_spec_by_uuid(root+5, &major, &minor)) {
- if (smartmknod(path, S_IFBLK | 0600, makedev(major, minor))) {
- printf("mount: cannot create device %s (%d,%d)\n",
- path, major, minor);
- return 1;
- }
-
- return 0;
- }
-
- printf("mkrootdev: UUID %s not found\n", root+5);
-
- return 1;
- }
-
- fd = open("/proc/sys/kernel/real-root-dev", O_RDONLY, 0);
- if (fd < 0) {
- printf("mkrootdev: failed to open /proc/sys/kernel/real-root-dev: %d\n", errno);
- return 1;
- }
-
- i = read(fd, buf, sizeof(buf));
- if (i < 0) {
- printf("mkrootdev: failed to read real-root-dev: %d\n", errno);
- close(fd);
- return 1;
- }
-
- close(fd);
- if (i == 0)
- buf[i] = '\0';
- else
- buf[i - 1] = '\0';
-
- devNum = atoi(buf);
- if (devNum < 0) {
- printf("mkrootdev: bad device %s\n", buf);
- return 1;
- }
-
- if (!devNum && root)
- devNum = name_to_dev_t(root);
-
- if (smartmknod(path, S_IFBLK | 0700, devNum)) {
- printf("mkrootdev: mknod failed: %d\n", errno);
- return 1;
- }
-
- return 0;
-}
-
-int mkdirCommand(char * cmd, char * end) {
- char * dir;
- int ignoreExists = 0;
-
- cmd = getArg(cmd, end, &dir);
-
- if (cmd && !strcmp(dir, "-p")) {
- ignoreExists = 1;
- cmd = getArg(cmd, end, &dir);
- }
-
- if (!cmd) {
- printf("mkdir: directory expected\n");
- return 1;
- }
-
- if (mkdir(dir, 0755)) {
- if (!ignoreExists && errno == EEXIST) {
- printf("mkdir: failed to create %s: %d\n", dir, errno);
- return 1;
- }
- }
-
- return 0;
-}
-
-int accessCommand(char * cmd, char * end) {
- char * permStr;
- int perms = 0;
- char * file = NULL;
-
- cmd = getArg(cmd, end, &permStr);
- if (cmd) cmd = getArg(cmd, end, &file);
-
- if (!cmd || *permStr != '-') {
- printf("usage: access -[perm] file\n");
- return 1;
- }
-
- permStr++;
- while (*permStr) {
- switch (*permStr) {
- case 'r': perms |= R_OK; break;
- case 'w': perms |= W_OK; break;
- case 'x': perms |= X_OK; break;
- case 'f': perms |= F_OK; break;
- default:
- printf("perms must be -[r][w][x][f]\n");
- return 1;
- }
-
- permStr++;
- }
-
- if ((file == NULL) || (access(file, perms)))
- return 1;
-
- return 0;
-}
-
-int sleepCommand(char * cmd, char * end) {
- char *delaystr;
- int delay;
-
- if (!(cmd = getArg(cmd, end, &delaystr))) {
- printf("sleep: delay expected\n");
- return 1;
- }
-
- delay = atoi(delaystr);
- sleep(delay);
-
- return 0;
-}
-
-int readlinkCommand(char * cmd, char * end) {
- char * path;
- char * buf, * respath, * fullpath;
- struct stat sb;
- int rc = 0;
-
- if (!(cmd = getArg(cmd, end, &path))) {
- printf("readlink: file expected\n");
- return 1;
- }
-
- if (lstat(path, &sb) == -1) {
- fprintf(stderr, "unable to stat %s: %d\n", path, errno);
- return 1;
- }
-
- if (!S_ISLNK(sb.st_mode)) {
- printf("%s\n", path);
- return 0;
- }
-
- buf = malloc(512);
- if (readlink(path, buf, 512) == -1) {
- fprintf(stderr, "error readlink %s: %d\n", path, errno);
- free(buf);
- return 1;
- }
-
- /* symlink is absolute */
- if (buf[0] == '/') {
- printf("%s\n", buf);
- free(buf);
- return 0;
- }
-
- /* nope, need to handle the relative symlink case too */
- respath = strrchr(path, '/');
- if (respath) {
- *respath = '\0';
- }
-
- fullpath = malloc(512);
- /* and normalize it */
- snprintf(fullpath, 512, "%s/%s", path, buf);
- respath = malloc(PATH_MAX);
- if (!(respath = realpath(fullpath, respath))) {
- fprintf(stderr, "error realpath %s: %d\n", fullpath, errno);
- rc = 1;
- goto readlinkout;
- }
-
- printf("%s\n", respath);
- readlinkout:
- free(buf);
- free(respath);
- free(fullpath);
- return rc;
-}
-
-int doFind(char * dirName, char * name) {
- struct stat sb;
- DIR * dir;
- struct dirent * d;
- char * strBuf = alloca(strlen(dirName) + 1024);
-
- if (!(dir = opendir(dirName))) {
- fprintf(stderr, "error opening %s: %d\n", dirName, errno);
- return 0;
- }
-
- errno = 0;
- while ((d = readdir(dir))) {
- errno = 0;
-
- strcpy(strBuf, dirName);
- strcat(strBuf, "/");
- strcat(strBuf, d->d_name);
-
- if (!strcmp(d->d_name, name))
- printf("%s\n", strBuf);
-
- if (!strcmp(d->d_name, ".") || !strcmp(d->d_name, "..")) {
- errno = 0;
- continue;
- }
-
- if (lstat(strBuf, &sb)) {
- fprintf(stderr, "failed to stat %s: %d\n", strBuf, errno);
- errno = 0;
- continue;
- }
-
- if (S_ISDIR(sb.st_mode))
- doFind(strBuf, name);
- }
-
- if (errno) {
- closedir(dir);
- printf("error reading from %s: %d\n", dirName, errno);
- return 1;
- }
-
- closedir(dir);
-
- return 0;
-}
-
-int findCommand(char * cmd, char * end) {
- char * dir;
- char * name;
-
- cmd = getArg(cmd, end, &dir);
- if (cmd) cmd = getArg(cmd, end, &name);
- if (cmd && strcmp(name, "-name")) {
- printf("usage: find [path] -name [file]\n");
- return 1;
- }
-
- if (cmd) cmd = getArg(cmd, end, &name);
- if (!cmd) {
- printf("usage: find [path] -name [file]\n");
- return 1;
- }
-
- return doFind(dir, name);
-}
-
-int findlodevCommand(char * cmd, char * end) {
- char devName[20];
- int devNum;
- int fd;
- struct loop_info loopInfo;
- char separator[2] = "";
-
- if (*end != '\n') {
- printf("usage: findlodev\n");
- return 1;
- }
-
- if (!access("/dev/.devfsd", X_OK))
- strcpy(separator, "/");
-
- for (devNum = 0; devNum < 256; devNum++) {
- sprintf(devName, "/dev/loop%s%d", separator, devNum);
- if ((fd = open(devName, O_RDONLY)) < 0) return 0;
-
- if (ioctl(fd, LOOP_GET_STATUS, &loopInfo)) {
- close(fd);
- printf("%s\n", devName);
- return 0;
- }
-
- close(fd);
- }
-
- return 0;
-}
-
-int mknodCommand(char * cmd, char * end) {
- char * path, * type;
- char * majorStr, * minorStr;
- int major;
- int minor;
- char * chptr;
- mode_t mode;
-
- cmd = getArg(cmd, end, &path);
- cmd = getArg(cmd, end, &type);
- cmd = getArg(cmd, end, &majorStr);
- cmd = getArg(cmd, end, &minorStr);
- if (!minorStr) {
- printf("mknod: usage mknod <path> [c|b] <major> <minor>\n");
- return 1;
- }
-
- if (!strcmp(type, "b")) {
- mode = S_IFBLK;
- } else if (!strcmp(type, "c")) {
- mode = S_IFCHR;
- } else {
- printf("mknod: invalid type\n");
- return 1;
- }
-
- major = strtol(majorStr, &chptr, 10);
- if (*chptr) {
- printf("invalid major number\n");
- return 1;
- }
-
- minor = strtol(minorStr, &chptr, 10);
- if (*chptr) {
- printf("invalid minor number\n");
- return 1;
- }
-
- if (smartmknod(path, mode | 0600, makedev(major, minor))) {
- printf("mknod: failed to create %s: %d\n", path, errno);
- return 1;
- }
-
- return 0;
-}
-
-int mkdevicesCommand(char * cmd, char * end) {
- int fd;
- char *buf;
- int i;
- char * start, * chptr;
- int major, minor;
- char old;
- char devName[128];
- char * prefix;
-
- if (!(cmd = getArg(cmd, end, &prefix))) {
- printf("mkdevices: path expected\n");
- return 1;
- }
-
- if (cmd < end) {
- printf("mkdevices: unexpected arguments\n");
- return 1;
- }
-
- if ((fd = open("/proc/partitions", O_RDONLY)) < 0) {
- printf("mkrootdev: failed to open /proc/partitions: %d\n", errno);
- return 1;
- }
-
- i = readFD(fd, &buf);
- if (i < 1) {
- close(fd);
- printf("failed to read /proc/partitions: %d\n", errno);
- return 1;
- }
- buf[i] = '\0';
- close(fd);
-
- start = strchr(buf, '\n');
- if (start) {
- start++;
- start = strchr(buf, '\n');
- }
- if (!start) return 1;
-
- start = start + 1;
- while (*start) {
- while (*start && isspace(*start)) start++;
- major = strtol(start, &chptr, 10);
-
- if (start != chptr) {
- start = chptr;
- while (*start && isspace(*start)) start++;
- minor = strtol(start, &chptr, 10);
-
- if (start != chptr) {
- start = chptr;
- while (*start && isspace(*start)) start++;
- while (*start && !isspace(*start)) start++;
- while (*start && isspace(*start)) start++;
-
- if (*start) {
-
- chptr = start;
- while (!isspace(*chptr)) chptr++;
- old = *chptr;
- *chptr = '\0';
-
- if (testing) {
- printf("% 3d % 3d %s\n", major, minor, start);
- } else {
- char * ptr, * deviceDir;
- int i;
-
- sprintf(devName, "%s/%s", prefix, start);
- unlink(devName);
-
- ptr = devName;
- i = 0;
- while (*ptr)
- if (*ptr++ == '/')
- i++;
- if (i > 2) {
- deviceDir = alloca(strlen(devName) + 1);
- strcpy(deviceDir, devName);
- ptr = deviceDir + (strlen(devName) - 1);
- while (*ptr != '/')
- *ptr-- = '\0';
- if (access(deviceDir, X_OK) && mkdir(deviceDir, 0644)) {
- printf("mkdir: cannot create directory %s: %d\n", deviceDir, errno);
- }
- }
- if (smartmknod(devName, S_IFBLK | 0600,
- makedev(major, minor))) {
- printf("failed to create %s\n", devName);
- }
- }
-
- *chptr = old;
- start = chptr;
- }
-
- }
- }
-
- start = strchr(start, '\n');
- if (!*start) return 1;
- start = start + 1;
- }
-
- return 0;
-}
-
-static int getDevNumFromProc(char * file, char * device) {
- char buf[32768], line[4096];
- char * start, *end;
- int num;
- int fd;
-
- if ((fd = open(file, O_RDONLY)) == -1) {
- printf("can't open file %s: %d\n", file, errno);
- return -1;
- }
-
- num = read(fd, buf, sizeof(buf));
- if (num < 1) {
- close(fd);
- printf("failed to read %s: %d\n", file, errno);
- return -1;
- }
- buf[num] = '\0';
- close(fd);
-
- start = buf;
- end = strchr(start, '\n');
- while (start && end) {
- *end++ = '\0';
- if ((sscanf(start, "%d %s", &num, line)) == 2) {
- if (!strncmp(device, line, strlen(device)))
- return num;
- }
- start = end;
- end = strchr(start, '\n');
- }
- return -1;
-}
-
-int mkDMNodCommand(char * cmd, char * end) {
- int major = getDevNumFromProc("/proc/devices", "misc");
- int minor = getDevNumFromProc("/proc/misc", "device-mapper");
-
- if ((major == -1) || (minor == -1)) {
- printf("Unable to find device-mapper major/minor\n");
- return 1;
- }
-
- if (!access("/dev/mapper/control", R_OK)) {
- struct stat sb;
- if (stat("/dev/mapper/control", &sb) == 0) {
- if (S_ISCHR(sb.st_mode) && (sb.st_rdev == makedev(major, minor)))
- return 0;
- }
-
- unlink("/dev/mapper/control");
- }
-
- if (smartmknod("/dev/mapper/control", S_IFCHR | 0600,
- makedev(major, minor))) {
- printf("failed to create /dev/mapper/control\n");
- return 1;
- }
-
- return 0;
-}
-
-int setQuietCommand(char * cmd, char * end) {
- int fd, rc;
-
- if ((fd = open("/proc/cmdline", O_RDONLY)) >= 0) {
- char * buf = malloc(512);
- rc = read(fd, buf, 511);
- if (strstr(buf, "quiet") != NULL)
- reallyquiet = 1;
- close(fd);
- free(buf);
- }
-
- if (reallyquiet)
- quiet = 1;
-
- return 0;
-}
-
-int runStartup(int fd) {
- char contents[32768];
- int i;
- char * start, * end;
- char * chptr;
- int rc;
-
- i = read(fd, contents, sizeof(contents) - 1);
- if (i == (sizeof(contents) - 1)) {
- printf("Failed to read /startup.rc -- file too large.\n");
- return 1;
- }
- close(fd);
-
- contents[i] = '\0';
-
- start = contents;
- while (*start) {
- while (isspace(*start) && *start && (*start != '\n')) start++;
-
- if (*start == '#')
- while (*start && (*start != '\n')) start++;
-
- if (*start == '\n') {
- start++;
- continue;
- }
-
- if (!*start) {
- printf("(last line in /startup.rc is empty)\n");
- continue;
- }
-
- /* start points to the beginning of the command */
- end = start + 1;
- while (*end && (*end != '\n')) end++;
- if (!*end) {
- printf("(last line in /startup.rc missing \\n -- skipping)\n");
- start = end;
- continue;
- }
-
- /* end points to the \n at the end of the command */
-
- chptr = start;
- while (chptr < end && !isspace(*chptr)) chptr++;
-
- if (!strncmp(start, "mount", MAX(5, chptr - start)))
- rc = mountCommand(chptr, end);
- else if (!strncmp(start, "losetup", MAX(7, chptr - start)))
- rc = losetupCommand(chptr, end);
- else if (!strncmp(start, "echo", MAX(4, chptr - start)))
- rc = echoCommand(chptr, end);
- else if (!strncmp(start, "raidautorun", MAX(11, chptr - start)))
- rc = raidautorunCommand(chptr, end);
- else if (!strncmp(start, "pivot_root", MAX(10, chptr - start)))
- rc = pivotrootCommand(chptr, end);
- else if (!strncmp(start, "switchroot", MAX(10, chptr - start)))
- rc = switchrootCommand(chptr, end);
- else if (!strncmp(start, "mkrootdev", MAX(9, chptr - start)))
- rc = mkrootdevCommand(chptr, end);
- else if (!strncmp(start, "umount", MAX(6, chptr - start)))
- rc = umountCommand(chptr, end);
- else if (!strncmp(start, "exec", MAX(4, chptr - start)))
- rc = execCommand(chptr, end);
- else if (!strncmp(start, "mkdir", MAX(5, chptr - start)))
- rc = mkdirCommand(chptr, end);
- else if (!strncmp(start, "access", MAX(6, chptr - start)))
- rc = accessCommand(chptr, end);
- else if (!strncmp(start, "find", MAX(4, chptr - start)))
- rc = findCommand(chptr, end);
- else if (!strncmp(start, "findlodev", MAX(7, chptr - start)))
- rc = findlodevCommand(chptr, end);
- else if (!strncmp(start, "showlabels", MAX(10, chptr-start)))
- rc = display_uuid_cache();
- else if (!strncmp(start, "mkdevices", MAX(9, chptr-start)))
- rc = mkdevicesCommand(chptr, end);
- else if (!strncmp(start, "sleep", MAX(5, chptr-start)))
- rc = sleepCommand(chptr, end);
- else if (!strncmp(start, "mknod", MAX(5, chptr-start)))
- rc = mknodCommand(chptr, end);
- else if (!strncmp(start, "mkdmnod", MAX(7, chptr-start)))
- rc = mkDMNodCommand(chptr, end);
- else if (!strncmp(start, "readlink", MAX(8, chptr-start)))
- rc = readlinkCommand(chptr, end);
- else if (!strncmp(start, "setquiet", MAX(8, chptr-start)))
- rc = setQuietCommand(chptr, end);
-#ifdef DEBUG
- else if (!strncmp(start, "cat", MAX(3, chptr-start)))
- rc = catCommand(chptr, end);
- else if (!strncmp(start, "ls", MAX(2, chptr-start)))
- rc = lsCommand(chptr, end);
-#endif
- else {
- *chptr = '\0';
- rc = otherCommand(start, chptr + 1, end, 1);
- }
-
- start = end + 1;
- }
-
- return rc;
-}
-
-int main(int argc, char **argv) {
- int fd = 0;
- char * name;
- int rc;
- int force = 0;
-
- name = strrchr(argv[0], '/');
- if (!name)
- name = argv[0];
- else
- name++;
-
- if (!strcmp(name, "modprobe"))
- exit(0);
- if (!strcmp(name, "hotplug")) {
- argv[0] = strdup("/sbin/udev");
- execv(argv[0], argv);
- printf("ERROR: exec of udev failed!\n");
- exit(1);
- }
-
- testing = (getppid() != 0) && (getppid() != 1);
- argv++, argc--;
-
- while (argc && **argv == '-') {
- if (!strcmp(*argv, "--force")) {
- force = 1;
- argv++, argc--;
- testing = 0;
- } else if (!strcmp(*argv, "--quiet")) {
- quiet = 1;
- argv++, argc--;
- } else if (!strcmp(*argv, "--reallyquiet")) {
- reallyquiet = 1;
- argv++, argc--;
- } else {
- printf("unknown argument %s\n", *argv);
- return 1;
- }
- }
-
- if (force && !quiet)
- printf("(forcing normal run)\n");
-
- if (testing && !quiet)
- printf("(running in test mode).\n");
-
- if (!quiet) printf("Red Hat nash version %s starting\n", VERSION);
-
- if (*argv) {
- fd = open(*argv, O_RDONLY, 0);
- if (fd < 0) {
- printf("nash: cannot open %s: %d\n", *argv, errno);
- exit(1);
- }
- }
-
- /* runStartup closes fd */
- rc = runStartup(fd);
-
- return rc;
-}
projects / people / pmueller / ipfire-2.x.git / blobdiff