-/*\r
- * nash.c\r
- * \r
- * Simple code to load modules, mount root, and get things going. Uses\r
- * dietlibc to keep things small.\r
- *\r
- * Erik Troan (ewt@redhat.com)\r
- *\r
- * Copyright 2002 Red Hat Software \r
- *\r
- * This software may be freely redistributed under the terms of the GNU\r
- * public license.\r
- *\r
- * You should have received a copy of the GNU General Public License\r
- * along with this program; if not, write to the Free Software\r
- * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.\r
- *\r
- */\r
-\r
-/* We internalize losetup, mount, raidautorun, and echo commands. Other\r
- commands are run from the filesystem. Comments and blank lines work as \r
- well, argument parsing is screwy. */\r
-\r
-#include <ctype.h>\r
-#include <dirent.h>\r
-#include <errno.h>\r
-#include <fcntl.h>\r
-#include <net/if.h>\r
-#include <signal.h>\r
-#include <stdio.h>\r
-#include <stdlib.h>\r
-#include <string.h>\r
-#include <sys/ioctl.h>\r
-#include <sys/mount.h>\r
-#include <sys/socket.h>\r
-#include <sys/stat.h>\r
-#include <sys/time.h>\r
-#include <sys/types.h>\r
-#include <sys/un.h>\r
-#include <sys/wait.h>\r
-#include <unistd.h>\r
-#include <sys/ioctl.h>\r
-#include <sys/reboot.h>\r
-#include <termios.h>\r
-\r
-#include <asm/unistd.h>\r
-\r
-#include "mount_by_label.h"\r
-\r
-/* Need to tell loop.h what the actual dev_t type is. */\r
-#undef dev_t\r
-#if defined(__alpha) || (defined(__sparc__) && defined(__arch64__))\r
-#define dev_t unsigned int\r
-#else\r
-#define dev_t unsigned short\r
-#endif\r
-#include <linux/loop.h>\r
-#undef dev_t\r
-#define dev_t dev_t\r
-\r
-#define syslog klogctl\r
-\r
-#include <linux/cdrom.h>\r
-#define MD_MAJOR 9\r
-#include <linux/raid/md_u.h>\r
-\r
-#ifndef RAID_AUTORUN\r
-#define RAID_AUTORUN _IO (MD_MAJOR, 0x14)\r
-#endif\r
-\r
-#ifndef MS_REMOUNT\r
-#define MS_REMOUNT 32\r
-#endif\r
-\r
-#ifdef USE_DIET\r
-static inline _syscall2(int,pivot_root,const char *,one,const char *,two)\r
-#endif\r
-\r
-#define MAX(a, b) ((a) > (b) ? a : b)\r
-\r
-int testing = 0, quiet = 0;\r
-\r
-#define PATH "/usr/bin:/bin:/sbin:/usr/sbin"\r
-\r
-char * env[] = {\r
- "PATH=" PATH,\r
- NULL\r
-};\r
-\r
-int smartmknod(char * device, mode_t mode, dev_t dev) {\r
- char buf[256];\r
- char * end;\r
-\r
- strcpy(buf, device);\r
-\r
- end = buf;\r
- while (*end) {\r
- if (*end == '/') {\r
- *end = '\0';\r
- if (access(buf, F_OK) && errno == ENOENT) \r
- mkdir(buf, 0700);\r
- *end = '/';\r
- }\r
-\r
- end++;\r
- }\r
-\r
- return mknod(device, mode, dev);\r
-}\r
-\r
-char * getArg(char * cmd, char * end, char ** arg) {\r
- char quote = '\0';\r
-\r
- if (cmd >= end) return NULL;\r
-\r
- while (isspace(*cmd) && cmd < end) cmd++;\r
- if (cmd >= end) return NULL;\r
-\r
- if (*cmd == '"')\r
- cmd++, quote = '"';\r
- else if (*cmd == '\'')\r
- cmd++, quote = '\'';\r
-\r
- if (quote) {\r
- *arg = cmd;\r
-\r
- /* This doesn't support \ escapes */\r
- while (cmd < end && *cmd != quote) cmd++;\r
-\r
- if (cmd == end) {\r
- printf("error: quote mismatch for %s\n", *arg);\r
- return NULL;\r
- }\r
-\r
- *cmd = '\0';\r
- cmd++;\r
- } else {\r
- *arg = cmd;\r
- while (!isspace(*cmd) && cmd < end) cmd++;\r
- *cmd = '\0';\r
- }\r
-\r
- cmd++;\r
-\r
- while (isspace(*cmd)) cmd++;\r
-\r
- return cmd;\r
-}\r
-\r
-int mountCommand(char * cmd, char * end) {\r
- char * fsType = NULL;\r
- char * device;\r
- char * mntPoint;\r
- char * deviceDir;\r
- char * options = NULL;\r
- int mustRemove = 0;\r
- int mustRemoveDir = 0;\r
- int rc;\r
- int flags = MS_MGC_VAL;\r
- char * newOpts;\r
-\r
- cmd = getArg(cmd, end, &device);\r
- if (!cmd) {\r
- printf("usage: mount [--ro] [-o <opts>] -t <type> <device> <mntpoint>\n");\r
- return 1;\r
- }\r
-\r
- while (cmd && *device == '-') {\r
- if (!strcmp(device, "--ro")) {\r
- flags |= MS_RDONLY;\r
- } else if (!strcmp(device, "-o")) {\r
- cmd = getArg(cmd, end, &options);\r
- if (!cmd) {\r
- printf("mount: -o requires arguments\n");\r
- return 1;\r
- }\r
- } else if (!strcmp(device, "-t")) {\r
- if (!(cmd = getArg(cmd, end, &fsType))) {\r
- printf("mount: missing filesystem type\n");\r
- return 1;\r
- }\r
- }\r
-\r
- cmd = getArg(cmd, end, &device);\r
- }\r
-\r
- if (!cmd) {\r
- printf("mount: missing device\n");\r
- return 1;\r
- }\r
-\r
- if (!(cmd = getArg(cmd, end, &mntPoint))) {\r
- printf("mount: missing mount point\n");\r
- return 1;\r
- }\r
-\r
- if (!fsType) {\r
- printf("mount: filesystem type expected\n");\r
- return 1;\r
- }\r
-\r
- if (cmd < end) {\r
- printf("mount: unexpected arguments\n");\r
- return 1;\r
- }\r
-\r
- /* need to deal with options */ \r
- if (options) {\r
- char * end;\r
- char * start = options;\r
-\r
- newOpts = alloca(strlen(options) + 1);\r
- *newOpts = '\0';\r
-\r
- while (*start) {\r
- end = strchr(start, ',');\r
- if (!end) {\r
- end = start + strlen(start);\r
- } else {\r
- *end = '\0';\r
- end++;\r
- }\r
-\r
- if (!strcmp(start, "ro"))\r
- flags |= MS_RDONLY;\r
- else if (!strcmp(start, "rw"))\r
- flags &= ~MS_RDONLY;\r
- else if (!strcmp(start, "nosuid"))\r
- flags |= MS_NOSUID;\r
- else if (!strcmp(start, "suid"))\r
- flags &= ~MS_NOSUID;\r
- else if (!strcmp(start, "nodev"))\r
- flags |= MS_NODEV;\r
- else if (!strcmp(start, "dev"))\r
- flags &= ~MS_NODEV;\r
- else if (!strcmp(start, "noexec"))\r
- flags |= MS_NOEXEC;\r
- else if (!strcmp(start, "exec"))\r
- flags &= ~MS_NOEXEC;\r
- else if (!strcmp(start, "sync"))\r
- flags |= MS_SYNCHRONOUS;\r
- else if (!strcmp(start, "async"))\r
- flags &= ~MS_SYNCHRONOUS;\r
- else if (!strcmp(start, "nodiratime"))\r
- flags |= MS_NODIRATIME;\r
- else if (!strcmp(start, "diratime"))\r
- flags &= ~MS_NODIRATIME;\r
- else if (!strcmp(start, "noatime"))\r
- flags |= MS_NOATIME;\r
- else if (!strcmp(start, "atime"))\r
- flags &= ~MS_NOATIME;\r
- else if (!strcmp(start, "remount"))\r
- flags |= MS_REMOUNT;\r
- else if (!strcmp(start, "defaults"))\r
- ;\r
- else {\r
- if (*newOpts)\r
- strcat(newOpts, ",");\r
- strcat(newOpts, start);\r
- }\r
-\r
- start = end;\r
- }\r
-\r
- options = newOpts;\r
- }\r
-\r
- if (!strncmp("LABEL=", device, 6)) {\r
- int major, minor;\r
- char * devName;\r
- char * ptr;\r
- int i;\r
-\r
- devName = get_spec_by_volume_label(device + 6, &major, &minor);\r
-\r
- if (devName) {\r
- device = devName;\r
- if (access(device, F_OK)) {\r
- ptr = device;\r
- i = 0;\r
- while (*ptr)\r
- if (*ptr++ == '/')\r
- i++;\r
- if (i > 2) {\r
- deviceDir = alloca(strlen(device) + 1);\r
- strcpy(deviceDir, device);\r
- ptr = deviceDir + (strlen(device) - 1);\r
- while (*ptr != '/')\r
- *ptr-- = '\0';\r
- if (mkdir(deviceDir, 0644)) {\r
- printf("mkdir: cannot create directory %s\n", deviceDir);\r
- } else {\r
- mustRemoveDir = 1;\r
- }\r
- }\r
- if (smartmknod(device, S_IFBLK | 0600, makedev(major, minor))) {\r
- printf("mount: cannot create device %s (%d,%d)\n",\r
- device, major, minor);\r
- return 1;\r
- }\r
- mustRemove = 1;\r
- }\r
- }\r
- }\r
-\r
- if (testing) {\r
- printf("mount %s%s%s-t '%s' '%s' '%s' (%s%s%s%s%s%s%s)\n", \r
- options ? "-o '" : "", \r
- options ? options : "", \r
- options ? "\' " : "", \r
- fsType, device, mntPoint,\r
- (flags & MS_RDONLY) ? "ro " : "",\r
- (flags & MS_NOSUID) ? "nosuid " : "",\r
- (flags & MS_NODEV) ? "nodev " : "",\r
- (flags & MS_NOEXEC) ? "noexec " : "",\r
- (flags & MS_SYNCHRONOUS) ? "sync " : "",\r
- (flags & MS_REMOUNT) ? "remount " : "",\r
- (flags & MS_NOATIME) ? "noatime " : ""\r
- );\r
- } else {\r
- if (mount(device, mntPoint, fsType, flags, options)) {\r
- printf("mount: error %d mounting %s\n", errno, fsType);\r
- rc = 1;\r
- }\r
- }\r
-\r
- if (mustRemove) unlink(device);\r
- if (mustRemoveDir) rmdir(deviceDir);\r
-\r
- return rc;\r
-}\r
-\r
-int otherCommand(char * bin, char * cmd, char * end, int doFork) {\r
- char * args[128];\r
- char ** nextArg;\r
- int pid;\r
- int status;\r
- char fullPath[255];\r
- const static char * sysPath = PATH;\r
- const char * pathStart;\r
- const char * pathEnd;\r
- char * stdoutFile = NULL;\r
- int stdoutFd = 0;\r
-\r
- nextArg = args;\r
-\r
- if (!strchr(bin, '/')) {\r
- pathStart = sysPath;\r
- while (*pathStart) {\r
- pathEnd = strchr(pathStart, ':');\r
-\r
- if (!pathEnd) pathEnd = pathStart + strlen(pathStart);\r
-\r
- strncpy(fullPath, pathStart, pathEnd - pathStart);\r
- fullPath[pathEnd - pathStart] = '/';\r
- strcpy(fullPath + (pathEnd - pathStart + 1), bin); \r
-\r
- pathStart = pathEnd;\r
- if (*pathStart) pathStart++;\r
-\r
- if (!access(fullPath, X_OK)) {\r
- bin = fullPath;\r
- break;\r
- }\r
- }\r
- }\r
-\r
- *nextArg = bin;\r
-\r
- while (cmd && cmd < end) {\r
- nextArg++;\r
- cmd = getArg(cmd, end, nextArg);\r
- }\r
- \r
- if (cmd) nextArg++;\r
- *nextArg = NULL;\r
-\r
- /* if the next-to-last arg is a >, redirect the output properly */\r
- if (((nextArg - args) >= 2) && !strcmp(*(nextArg - 2), ">")) {\r
- stdoutFile = *(nextArg - 1);\r
- *(nextArg - 2) = NULL;\r
-\r
- stdoutFd = open(stdoutFile, O_CREAT | O_RDWR | O_TRUNC, 0600);\r
- if (stdoutFd < 0) {\r
- printf("nash: failed to open %s: %d\n", stdoutFile, errno);\r
- return 1;\r
- }\r
- }\r
-\r
- if (testing) {\r
- printf("%s ", bin);\r
- nextArg = args + 1;\r
- while (*nextArg)\r
- printf(" '%s'", *nextArg++);\r
- if (stdoutFile)\r
- printf(" (> %s)", stdoutFile);\r
- printf("\n");\r
- } else {\r
- if (!doFork || !(pid = fork())) {\r
- /* child */\r
- dup2(stdoutFd, 1);\r
- execve(args[0], args, env);\r
- printf("ERROR: failed in exec of %s\n", args[0]);\r
- return 1;\r
- }\r
-\r
- close(stdoutFd);\r
-\r
- wait4(-1, &status, 0, NULL);\r
- if (!WIFEXITED(status) || WEXITSTATUS(status)) {\r
- printf("ERROR: %s exited abnormally!\n", args[0]);\r
- return 1;\r
- }\r
- }\r
-\r
- return 0;\r
-}\r
-\r
-int execCommand(char * cmd, char * end) {\r
- char * bin;\r
-\r
- if (!(cmd = getArg(cmd, end, &bin))) {\r
- printf("exec: argument expected\n");\r
- return 1;\r
- }\r
-\r
- return otherCommand(bin, cmd, end, 0);\r
-}\r
-\r
-int losetupCommand(char * cmd, char * end) {\r
- char * device;\r
- char * file;\r
- int fd;\r
- struct loop_info loopInfo;\r
- int dev;\r
-\r
- if (!(cmd = getArg(cmd, end, &device))) {\r
- printf("losetup: missing device\n");\r
- return 1;\r
- }\r
-\r
- if (!(cmd = getArg(cmd, end, &file))) {\r
- printf("losetup: missing file\n");\r
- return 1;\r
- }\r
-\r
- if (cmd < end) {\r
- printf("losetup: unexpected arguments\n");\r
- return 1;\r
- }\r
-\r
- if (testing) {\r
- printf("losetup '%s' '%s'\n", device, file);\r
- } else {\r
- dev = open(device, O_RDWR, 0);\r
- if (dev < 0) {\r
- printf("losetup: failed to open %s: %d\n", device, errno);\r
- return 1;\r
- }\r
-\r
- fd = open(file, O_RDWR, 0);\r
- if (fd < 0) {\r
- printf("losetup: failed to open %s: %d\n", file, errno);\r
- close(dev);\r
- return 1;\r
- }\r
-\r
- if (ioctl(dev, LOOP_SET_FD, (long) fd)) {\r
- printf("losetup: LOOP_SET_FD failed: %d\n", errno);\r
- close(dev);\r
- close(fd);\r
- return 1;\r
- }\r
-\r
- close(fd);\r
-\r
- memset(&loopInfo, 0, sizeof(loopInfo));\r
- strcpy(loopInfo.lo_name, file);\r
-\r
- if (ioctl(dev, LOOP_SET_STATUS, &loopInfo)) \r
- printf("losetup: LOOP_SET_STATUS failed: %d\n", errno);\r
-\r
- close(dev);\r
- }\r
-\r
- return 0;\r
-}\r
-\r
-int raidautorunCommand(char * cmd, char * end) {\r
- char * device;\r
- int fd;\r
-\r
- if (!(cmd = getArg(cmd, end, &device))) {\r
- printf("raidautorun: raid device expected as first argument\n");\r
- return 1;\r
- }\r
-\r
- if (cmd < end) {\r
- printf("raidautorun: unexpected arguments\n");\r
- return 1;\r
- }\r
-\r
- fd = open(device, O_RDWR, 0);\r
- if (fd < 0) {\r
- printf("raidautorun: failed to open %s: %d\n", device, errno);\r
- return 1;\r
- }\r
-\r
- if (ioctl(fd, RAID_AUTORUN, 0)) {\r
- printf("raidautorun: RAID_AUTORUN failed: %d\n", errno);\r
- close(fd);\r
- return 1;\r
- }\r
-\r
- close(fd);\r
- return 0;\r
-}\r
-\r
-static int my_pivot_root(char * one, char * two) {\r
-#ifdef USE_DIET\r
- return pivot_root(one, two);\r
-#else\r
- return syscall(__NR_pivot_root, one, two);\r
-#endif\r
-}\r
-\r
-int pivotrootCommand(char * cmd, char * end) {\r
- char * new;\r
- char * old;\r
-\r
- if (!(cmd = getArg(cmd, end, &new))) {\r
- printf("pivotroot: new root mount point expected\n");\r
- return 1;\r
- }\r
-\r
- if (!(cmd = getArg(cmd, end, &old))) {\r
- printf("pivotroot: old root mount point expected\n");\r
- return 1;\r
- }\r
-\r
- if (cmd < end) {\r
- printf("pivotroot: unexpected arguments\n");\r
- return 1;\r
- }\r
-\r
- if (my_pivot_root(new, old)) {\r
- printf("pivotroot: pivot_root(%s,%s) failed: %d\n", new, old, errno);\r
- return 1;\r
- }\r
-\r
- return 0;\r
-}\r
-\r
-int echoCommand(char * cmd, char * end) {\r
- char * args[256];\r
- char ** nextArg = args;\r
- int outFd = 1;\r
- int num = 0;\r
- int i;\r
-\r
- if (testing && !quiet) {\r
- printf("(echo) ");\r
- fflush(stdout);\r
- }\r
-\r
- while ((cmd = getArg(cmd, end, nextArg)))\r
- nextArg++, num++;\r
-\r
- if ((nextArg - args >= 2) && !strcmp(*(nextArg - 2), ">")) {\r
- outFd = open(*(nextArg - 1), O_RDWR | O_CREAT | O_TRUNC, 0644);\r
- if (outFd < 0) {\r
- printf("echo: cannot open %s for write: %d\n", \r
- *(nextArg - 1), errno);\r
- return 1;\r
- }\r
-\r
- num -= 2;\r
- }\r
-\r
- for (i = 0; i < num;i ++) {\r
- if (i)\r
- write(outFd, " ", 1);\r
- write(outFd, args[i], strlen(args[i]));\r
- }\r
-\r
- write(outFd, "\n", 1);\r
-\r
- if (outFd != 1) close(outFd);\r
-\r
- return 0;\r
-}\r
-\r
-int umountCommand(char * cmd, char * end) {\r
- char * path;\r
-\r
- if (!(cmd = getArg(cmd, end, &path))) {\r
- printf("umount: path expected\n");\r
- return 1;\r
- }\r
-\r
- if (cmd < end) {\r
- printf("umount: unexpected arguments\n");\r
- return 1;\r
- }\r
-\r
- if (umount(path)) {\r
- printf("umount %s failed: %d\n", path, errno);\r
- return 1;\r
- }\r
-\r
- return 0;\r
-}\r
-\r
-int mkrootdevCommand(char * cmd, char * end) {\r
- char * path;\r
- char * start, * chptr;\r
- unsigned int devNum = 0;\r
- int fd;\r
- int i;\r
- char buf[1024];\r
- int major, minor;\r
-\r
- if (!(cmd = getArg(cmd, end, &path))) {\r
- printf("mkrootdev: path expected\n");\r
- return 1;\r
- }\r
-\r
- if (cmd < end) {\r
- printf("mkrootdev: unexpected arguments\n");\r
- return 1;\r
- }\r
-\r
- fd = open("/proc/cmdline", O_RDONLY, 0);\r
- if (fd < 0) {\r
- printf("mkrootdev: failed to open /proc/cmdline: %d\n", errno);\r
- return 1;\r
- }\r
-\r
- i = read(fd, buf, sizeof(buf));\r
- if (i < 0) {\r
- printf("mkrootdev: failed to read /proc/cmdline: %d\n", errno);\r
- close(fd);\r
- return 1;\r
- }\r
-\r
- close(fd);\r
- buf[i - 1] = '\0';\r
-\r
- start = buf;\r
- while (*start && isspace(*start)) start++;\r
- while (*start && strncmp(start, "root=", 5)) {\r
- while (*start && !isspace(*start)) start++;\r
- while (*start && isspace(*start)) start++;\r
- }\r
-\r
- start += 5;\r
- chptr = start;\r
- while (*chptr && !isspace(*chptr)) chptr++;\r
- *chptr = '\0';\r
-\r
- if (!strncmp(start, "LABEL=", 6)) {\r
- if (get_spec_by_volume_label(start + 6, &major, &minor)) {\r
- if (smartmknod(path, S_IFBLK | 0600, makedev(major, minor))) {\r
- printf("mount: cannot create device %s (%d,%d)\n",\r
- path, major, minor);\r
- return 1;\r
- }\r
-\r
- return 0;\r
- }\r
-\r
- printf("mkrootdev: label %s not found\n", start + 6);\r
-\r
- return 1;\r
- }\r
-\r
- fd = open("/proc/sys/kernel/real-root-dev", O_RDONLY, 0);\r
- if (fd < 0) {\r
- printf("mkrootdev: failed to open /proc/sys/kernel/real-root-dev: %d\n", errno);\r
- return 1;\r
- }\r
-\r
- i = read(fd, buf, sizeof(buf));\r
- if (i < 0) {\r
- printf("mkrootdev: failed to read real-root-dev: %d\n", errno);\r
- close(fd);\r
- return 1;\r
- }\r
-\r
- close(fd);\r
- buf[i - 1] = '\0';\r
-\r
- devNum = atoi(buf);\r
- if (devNum < 0) {\r
- printf("mkrootdev: bad device %s\n", buf);\r
- return 1;\r
- }\r
-\r
- if (smartmknod(path, S_IFBLK | 0700, devNum)) {\r
- printf("mkrootdev: mknod failed: %d\n", errno);\r
- return 1;\r
- }\r
-\r
- return 0;\r
-}\r
-\r
-int mkdirCommand(char * cmd, char * end) {\r
- char * dir;\r
- int ignoreExists = 0;\r
-\r
- cmd = getArg(cmd, end, &dir);\r
-\r
- if (cmd && !strcmp(dir, "-p")) {\r
- ignoreExists = 1;\r
- cmd = getArg(cmd, end, &dir);\r
- }\r
-\r
- if (!cmd) {\r
- printf("mkdir: directory expected\n");\r
- return 1;\r
- }\r
-\r
- if (mkdir(dir, 0755)) {\r
- if (!ignoreExists && errno == EEXIST) {\r
- printf("mkdir: failed to create %s: %d\n", dir, errno);\r
- return 1;\r
- }\r
- }\r
-\r
- return 0;\r
-}\r
-\r
-int accessCommand(char * cmd, char * end) {\r
- char * permStr;\r
- int perms = 0;\r
- char * file;\r
-\r
- cmd = getArg(cmd, end, &permStr);\r
- if (cmd) cmd = getArg(cmd, end, &file);\r
-\r
- if (!cmd || *permStr != '-') {\r
- printf("usage: access -[perm] file\n");\r
- return 1;\r
- }\r
-\r
- permStr++;\r
- while (*permStr) {\r
- switch (*permStr) {\r
- case 'r': perms |= R_OK; break;\r
- case 'w': perms |= W_OK; break;\r
- case 'x': perms |= X_OK; break;\r
- case 'f': perms |= F_OK; break;\r
- default:\r
- printf("perms must be -[r][w][x][f]\n");\r
- return 1;\r
- }\r
-\r
- permStr++;\r
- }\r
-\r
- if (access(file, perms))\r
- return 1;\r
-\r
- return 0;\r
-}\r
-\r
-int sleepCommand(char * cmd, char * end) {\r
- char *delaystr;\r
- int delay;\r
-\r
- if (!(cmd = getArg(cmd, end, &delaystr))) {\r
- printf("sleep: delay expected\n");\r
- return 1;\r
- }\r
-\r
- delay = atoi(delaystr);\r
- sleep(delay);\r
-\r
- return 0;\r
-}\r
-\r
-int readlinkCommand(char * cmd, char * end) {\r
- char * path;\r
- char * buf, * respath, * fullpath;\r
- struct stat sb;\r
-\r
- if (!(cmd = getArg(cmd, end, &path))) {\r
- printf("readlink: file expected\n");\r
- return 1;\r
- }\r
-\r
- if (lstat(path, &sb) == -1) {\r
- fprintf(stderr, "unable to stat %s: %d\n", path, errno);\r
- return 1;\r
- }\r
-\r
- if (!S_ISLNK(sb.st_mode)) {\r
- printf("%s\n", path);\r
- return 0;\r
- }\r
- \r
- buf = malloc(512);\r
- if (readlink(path, buf, 512) == -1) {\r
- fprintf(stderr, "error readlink %s: %d\n", path, errno);\r
- return 1;\r
- }\r
-\r
- /* symlink is absolute */\r
- if (buf[0] == '/') {\r
- printf("%s\n", buf);\r
- return 0;\r
- } \r
- \r
- /* nope, need to handle the relative symlink case too */\r
- respath = strrchr(path, '/');\r
- if (respath) {\r
- *respath = '\0';\r
- }\r
-\r
- fullpath = malloc(512);\r
- /* and normalize it */\r
- snprintf(fullpath, 512, "%s/%s", path, buf);\r
- respath = malloc(PATH_MAX);\r
- if (!(respath = realpath(fullpath, respath))) {\r
- fprintf(stderr, "error realpath %s: %d\n", fullpath, errno);\r
- return 1;\r
- }\r
-\r
- printf("%s\n", respath);\r
- return 0;\r
-}\r
-\r
-int doFind(char * dirName, char * name) {\r
- struct stat sb;\r
- DIR * dir;\r
- struct dirent * d;\r
- char * strBuf = alloca(strlen(dirName) + 1024);\r
-\r
- if (!(dir = opendir(dirName))) {\r
- fprintf(stderr, "error opening %s: %d\n", dirName, errno);\r
- return 0;\r
- }\r
-\r
- errno = 0;\r
- while ((d = readdir(dir))) {\r
- errno = 0;\r
-\r
- strcpy(strBuf, dirName);\r
- strcat(strBuf, "/");\r
- strcat(strBuf, d->d_name);\r
-\r
- if (!strcmp(d->d_name, name))\r
- printf("%s\n", strBuf);\r
-\r
- if (!strcmp(d->d_name, ".") || !strcmp(d->d_name, "..")) {\r
- errno = 0;\r
- continue;\r
- }\r
-\r
- if (lstat(strBuf, &sb)) {\r
- fprintf(stderr, "failed to stat %s: %d\n", strBuf, errno);\r
- errno = 0;\r
- continue;\r
- }\r
-\r
- if (S_ISDIR(sb.st_mode))\r
- doFind(strBuf, name);\r
- }\r
-\r
- if (errno) {\r
- closedir(dir);\r
- printf("error reading from %s: %d\n", dirName, errno);\r
- return 1;\r
- }\r
-\r
- closedir(dir);\r
-\r
- return 0;\r
-}\r
-\r
-int findCommand(char * cmd, char * end) {\r
- char * dir;\r
- char * name;\r
-\r
- cmd = getArg(cmd, end, &dir);\r
- if (cmd) cmd = getArg(cmd, end, &name);\r
- if (cmd && strcmp(name, "-name")) {\r
- printf("usage: find [path] -name [file]\n");\r
- return 1;\r
- }\r
-\r
- if (cmd) cmd = getArg(cmd, end, &name);\r
- if (!cmd) {\r
- printf("usage: find [path] -name [file]\n");\r
- return 1;\r
- }\r
-\r
- return doFind(dir, name);\r
-}\r
-\r
-int findlodevCommand(char * cmd, char * end) {\r
- char devName[20];\r
- int devNum;\r
- int fd;\r
- struct loop_info loopInfo;\r
- char separator[2] = "";\r
-\r
- if (*end != '\n') {\r
- printf("usage: findlodev\n");\r
- return 1;\r
- }\r
-\r
- if (!access("/dev/.devfsd", X_OK))\r
- strcpy(separator, "/");\r
-\r
- for (devNum = 0; devNum < 256; devNum++) {\r
- sprintf(devName, "/dev/loop%s%d", separator, devNum);\r
- if ((fd = open(devName, O_RDONLY)) < 0) return 0;\r
-\r
- if (ioctl(fd, LOOP_GET_STATUS, &loopInfo)) {\r
- close(fd);\r
- printf("%s\n", devName);\r
- return 0;\r
- }\r
-\r
- close(fd);\r
- }\r
-\r
- return 0;\r
-}\r
-\r
-int mknodCommand(char * cmd, char * end) {\r
- char * path, * type;\r
- char * majorStr, * minorStr;\r
- int major;\r
- int minor;\r
- char * chptr;\r
- mode_t mode;\r
-\r
- cmd = getArg(cmd, end, &path);\r
- cmd = getArg(cmd, end, &type);\r
- cmd = getArg(cmd, end, &majorStr);\r
- cmd = getArg(cmd, end, &minorStr);\r
- if (!minorStr) {\r
- printf("mknod: usage mknod <path> [c|b] <major> <minor>\n");\r
- return 1;\r
- }\r
-\r
- if (!strcmp(type, "b")) {\r
- mode = S_IFBLK;\r
- } else if (!strcmp(type, "c")) {\r
- mode = S_IFCHR;\r
- } else {\r
- printf("mknod: invalid type\n");\r
- return 1;\r
- }\r
-\r
- major = strtol(majorStr, &chptr, 10);\r
- if (*chptr) {\r
- printf("invalid major number\n");\r
- return 1;\r
- }\r
-\r
- minor = strtol(minorStr, &chptr, 10);\r
- if (*chptr) {\r
- printf("invalid minor number\n");\r
- return 1;\r
- }\r
-\r
- if (smartmknod(path, mode | 0600, makedev(major, minor))) {\r
- printf("mknod: failed to create %s: %d\n", path, errno);\r
- return 1;\r
- }\r
-\r
- return 0;\r
-}\r
-\r
-int mkdevicesCommand(char * cmd, char * end) {\r
- int fd;\r
- char buf[32768];\r
- int i;\r
- char * start, * chptr;\r
- int major, minor;\r
- char old;\r
- char devName[128];\r
- char * prefix;\r
-\r
- if (!(cmd = getArg(cmd, end, &prefix))) {\r
- printf("mkdevices: path expected\n");\r
- return 1;\r
- }\r
-\r
- if (cmd < end) {\r
- printf("mkdevices: unexpected arguments\n");\r
- return 1;\r
- }\r
-\r
- if ((fd = open("/proc/partitions", O_RDONLY)) < 0) {\r
- printf("mkrootdev: failed to open /proc/partitions: %d\n", errno);\r
- return 1;\r
- }\r
-\r
- i = read(fd, buf, sizeof(buf));\r
- if (i < 1) {\r
- close(fd);\r
- printf("failed to read /proc/partitions: %d\n", errno);\r
- return 1;\r
- }\r
- buf[i] = '\0';\r
- close(fd);\r
-\r
- start = strchr(buf, '\n');\r
- if (start) {\r
- start++;\r
- start = strchr(buf, '\n');\r
- }\r
- if (!start) return 1;\r
-\r
- start = start + 1;\r
- while (*start) {\r
- while (*start && isspace(*start)) start++;\r
- major = strtol(start, &chptr, 10);\r
-\r
- if (start != chptr) {\r
- start = chptr;\r
- while (*start && isspace(*start)) start++;\r
- minor = strtol(start, &chptr, 10);\r
-\r
- if (start != chptr) {\r
- start = chptr;\r
- while (*start && isspace(*start)) start++;\r
- while (*start && !isspace(*start)) start++;\r
- while (*start && isspace(*start)) start++;\r
-\r
- if (*start) {\r
-\r
- chptr = start;\r
- while (!isspace(*chptr)) chptr++;\r
- old = *chptr;\r
- *chptr = '\0';\r
-\r
- if (testing) {\r
- printf("% 3d % 3d %s\n", major, minor, start);\r
- } else {\r
- char * ptr, * deviceDir;\r
- int i;\r
-\r
- sprintf(devName, "%s/%s", prefix, start);\r
- unlink(devName);\r
-\r
- ptr = devName;\r
- i = 0;\r
- while (*ptr)\r
- if (*ptr++ == '/')\r
- i++;\r
- if (i > 2) {\r
- deviceDir = alloca(strlen(devName) + 1);\r
- strcpy(deviceDir, devName);\r
- ptr = deviceDir + (strlen(devName) - 1);\r
- while (*ptr != '/')\r
- *ptr-- = '\0';\r
- if (access(deviceDir, X_OK) && mkdir(deviceDir, 0644)) {\r
- printf("mkdir: cannot create directory %s: %d\n", deviceDir, errno);\r
- }\r
- }\r
- if (smartmknod(devName, S_IFBLK | 0600, \r
- makedev(major, minor))) {\r
- printf("failed to create %s\n", devName);\r
- }\r
- }\r
-\r
- *chptr = old;\r
- start = chptr;\r
- }\r
-\r
- }\r
- }\r
-\r
- start = strchr(start, '\n');\r
- if (!*start) return 1;\r
- start = start + 1;\r
- }\r
-\r
- return 0;\r
-}\r
-\r
-int runStartup(int fd) {\r
- char contents[32768];\r
- int i;\r
- char * start, * end;\r
- char * chptr;\r
- int rc;\r
-\r
- i = read(fd, contents, sizeof(contents) - 1);\r
- if (i == (sizeof(contents) - 1)) {\r
- printf("Failed to read /startup.rc -- file too large.\n");\r
- return 1;\r
- }\r
-\r
- contents[i] = '\0';\r
-\r
- start = contents;\r
- while (*start) {\r
- while (isspace(*start) && *start && (*start != '\n')) start++;\r
-\r
- if (*start == '#')\r
- while (*start && (*start != '\n')) start++;\r
-\r
- if (*start == '\n') {\r
- start++;\r
- continue;\r
- }\r
-\r
- if (!*start) {\r
- printf("(last line in /startup.rc is empty)\n");\r
- continue;\r
- }\r
-\r
- /* start points to the beginning of the command */\r
- end = start + 1;\r
- while (*end && (*end != '\n')) end++;\r
- if (!*end) {\r
- printf("(last line in /startup.rc missing \\n -- skipping)\n");\r
- start = end;\r
- continue;\r
- }\r
-\r
- /* end points to the \n at the end of the command */\r
-\r
- chptr = start;\r
- while (chptr < end && !isspace(*chptr)) chptr++;\r
-\r
- if (!strncmp(start, "mount", MAX(5, chptr - start)))\r
- rc = mountCommand(chptr, end);\r
- else if (!strncmp(start, "losetup", MAX(7, chptr - start)))\r
- rc = losetupCommand(chptr, end);\r
- else if (!strncmp(start, "echo", MAX(4, chptr - start)))\r
- rc = echoCommand(chptr, end);\r
- else if (!strncmp(start, "raidautorun", MAX(11, chptr - start)))\r
- rc = raidautorunCommand(chptr, end);\r
- else if (!strncmp(start, "pivot_root", MAX(10, chptr - start)))\r
- rc = pivotrootCommand(chptr, end);\r
- else if (!strncmp(start, "mkrootdev", MAX(9, chptr - start)))\r
- rc = mkrootdevCommand(chptr, end);\r
- else if (!strncmp(start, "umount", MAX(6, chptr - start)))\r
- rc = umountCommand(chptr, end);\r
- else if (!strncmp(start, "exec", MAX(4, chptr - start)))\r
- rc = execCommand(chptr, end);\r
- else if (!strncmp(start, "mkdir", MAX(5, chptr - start)))\r
- rc = mkdirCommand(chptr, end);\r
- else if (!strncmp(start, "access", MAX(6, chptr - start)))\r
- rc = accessCommand(chptr, end);\r
- else if (!strncmp(start, "find", MAX(4, chptr - start)))\r
- rc = findCommand(chptr, end);\r
- else if (!strncmp(start, "findlodev", MAX(7, chptr - start)))\r
- rc = findlodevCommand(chptr, end);\r
- else if (!strncmp(start, "showlabels", MAX(10, chptr-start)))\r
- rc = display_uuid_cache();\r
- else if (!strncmp(start, "mkdevices", MAX(9, chptr-start)))\r
- rc = mkdevicesCommand(chptr, end);\r
- else if (!strncmp(start, "sleep", MAX(5, chptr-start)))\r
- rc = sleepCommand(chptr, end);\r
- else if (!strncmp(start, "mknod", MAX(5, chptr-start)))\r
- rc = mknodCommand(chptr, end);\r
- else if (!strncmp(start, "readlink", MAX(8, chptr-start)))\r
- rc = readlinkCommand(chptr, end);\r
- else {\r
- *chptr = '\0';\r
- rc = otherCommand(start, chptr + 1, end, 1);\r
- }\r
-\r
- start = end + 1;\r
- }\r
-\r
- return rc;\r
-}\r
-\r
-int main(int argc, char **argv) {\r
- int fd = 0;\r
- char * name;\r
- int rc;\r
- int force = 0;\r
-\r
- name = strrchr(argv[0], '/');\r
- if (!name) \r
- name = argv[0];\r
- else\r
- name++;\r
-\r
- if (!strcmp(name, "modprobe"))\r
- exit(0);\r
-\r
- testing = (getppid() != 0) && (getppid() != 1);\r
- argv++, argc--;\r
-\r
- while (argc && **argv == '-') {\r
- if (!strcmp(*argv, "--force")) {\r
- force = 1;\r
- argv++, argc--;\r
- testing = 0;\r
- } else if (!strcmp(*argv, "--quiet")) {\r
- quiet = 1;\r
- argv++, argc--;\r
- } else {\r
- printf("unknown argument %s\n", *argv);\r
- return 1;\r
- }\r
- }\r
-\r
- if (force && !quiet)\r
- printf("(forcing normal run)\n");\r
-\r
- if (testing && !quiet)\r
- printf("(running in test mode).\n");\r
-\r
- if (!quiet) printf("Red Hat nash version %s starting\n", VERSION);\r
-\r
- if (*argv) {\r
- fd = open(*argv, O_RDONLY, 0);\r
- if (fd < 0) {\r
- printf("nash: cannot open %s: %d\n", *argv, errno);\r
- exit(1);\r
- }\r
- }\r
-\r
- rc = runStartup(fd);\r
- close(fd);\r
-\r
- return rc;\r
-}\r
+/*
+ * 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 / ipfire-2.x.git / blobdiff