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Diffstat (limited to 'disk-utils/mkfs.cramfs.c')
| -rw-r--r-- | disk-utils/mkfs.cramfs.c | 828 |
1 files changed, 828 insertions, 0 deletions
diff --git a/disk-utils/mkfs.cramfs.c b/disk-utils/mkfs.cramfs.c new file mode 100644 index 000000000..5556708e4 --- /dev/null +++ b/disk-utils/mkfs.cramfs.c @@ -0,0 +1,828 @@ +/* + * mkcramfs - make a cramfs file system + * + * Copyright (C) 1999-2001 Transmeta Corporation + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + */ + +#include <sys/types.h> +#include <stdio.h> +#include <sys/stat.h> +#include <unistd.h> +#include <sys/mman.h> +#include <sys/fcntl.h> +#include <dirent.h> +#include <stdlib.h> +#include <errno.h> +#include <string.h> +#include <assert.h> +#include <getopt.h> +#include <zlib.h> + +#include "cramfs.h" +#include "nls.h" + +#define PAD_SIZE 512 /* only 0 and 512 supported by kernel */ + +static const char *progname = "mkcramfs"; +static int verbose = 0; + +/* Input status of 0 to print help and exit without an error. */ +static void usage(int status) +{ + FILE *stream = status ? stderr : stdout; + + fprintf(stream, + _("usage: %s [-h] [-v] [-e edition] [-i file] [-n name] " + "dirname outfile\n" + " -h print this help\n" + " -v be verbose\n" + " -E make all warnings errors " + "(non-zero exit status)\n" + " -e edition set edition number (part of fsid)\n" + " -i file insert a file image into the filesystem " + "(requires >= 2.4.0)\n" + " -n name set name of cramfs filesystem\n" + " -p pad by %d bytes for boot code\n" + " -s sort directory entries (old option, ignored)\n" + " -z make explicit holes (requires >= 2.3.39)\n" + " dirname root of the filesystem to be compressed\n" + " outfile output file\n"), + progname, PAD_SIZE); + + exit(status); +} + +#define PAGE_CACHE_SIZE (4096) +/* The kernel assumes PAGE_CACHE_SIZE as block size. */ +static unsigned int blksize = PAGE_CACHE_SIZE; +static long total_blocks = 0, total_nodes = 1; /* pre-count the root node */ +static int image_length = 0; + +/* + * If opt_holes is set, then mkcramfs can create explicit holes in the + * data, which saves 26 bytes per hole (which is a lot smaller a + * saving than most most filesystems). + * + * Note that kernels up to at least 2.3.39 don't support cramfs holes, + * which is why this is turned off by default. + */ +static int opt_edition = 0; +static int opt_errors = 0; +static int opt_holes = 0; +static int opt_pad = 0; +static char *opt_image = NULL; +static char *opt_name = NULL; + +static int warn_dev, warn_gid, warn_namelen, warn_skip, warn_size, warn_uid; + +#ifndef MIN +# define MIN(_a,_b) ((_a) < (_b) ? (_a) : (_b)) +#endif + +/* In-core version of inode / directory entry. */ +struct entry { + /* stats */ + char *name; + unsigned int mode, size, uid, gid; + + /* FS data */ + void *uncompressed; + /* points to other identical file */ + struct entry *same; + unsigned int offset; /* pointer to compressed data in archive */ + unsigned int dir_offset; /* Where in the archive is the directory entry? */ + + /* organization */ + struct entry *child; /* null for non-directories and empty directories */ + struct entry *next; +}; + +/* + * Width of various bitfields in struct cramfs_inode. + * Used only to generate warnings. + */ +#define CRAMFS_SIZE_WIDTH 24 +#define CRAMFS_UID_WIDTH 16 +#define CRAMFS_GID_WIDTH 8 +#define CRAMFS_OFFSET_WIDTH 26 + +/* + * The longest file name component to allow for in the input directory tree. + * Ext2fs (and many others) allow up to 255 bytes. A couple of filesystems + * allow longer (e.g. smbfs 1024), but there isn't much use in supporting + * >255-byte names in the input directory tree given that such names get + * truncated to 255 bytes when written to cramfs. + */ +#define MAX_INPUT_NAMELEN 255 + +static int find_identical_file(struct entry *orig,struct entry *newfile) +{ + if(orig==newfile) return 1; + if(!orig) return 0; + if(orig->size==newfile->size && orig->uncompressed && !memcmp(orig->uncompressed,newfile->uncompressed,orig->size)) { + newfile->same=orig; + return 1; + } + return find_identical_file(orig->child,newfile) || + find_identical_file(orig->next,newfile); +} + +static void eliminate_doubles(struct entry *root,struct entry *orig) { + if(orig) { + if(orig->size && orig->uncompressed) + find_identical_file(root,orig); + eliminate_doubles(root,orig->child); + eliminate_doubles(root,orig->next); + } +} + +/* + * We define our own sorting function instead of using alphasort which + * uses strcoll and changes ordering based on locale information. + */ +static int cramsort (const void *a, const void *b) +{ + return strcmp ((*(const struct dirent **) a)->d_name, + (*(const struct dirent **) b)->d_name); +} + +static unsigned int parse_directory(struct entry *root_entry, const char *name, struct entry **prev, loff_t *fslen_ub) +{ + struct dirent **dirlist; + int totalsize = 0, dircount, dirindex; + char *path, *endpath; + size_t len = strlen(name); + + /* Set up the path. */ + /* TODO: Reuse the parent's buffer to save memcpy'ing and duplication. */ + path = malloc(len + 1 + MAX_INPUT_NAMELEN + 1); + if (!path) { + perror(NULL); + exit(8); + } + memcpy(path, name, len); + endpath = path + len; + *endpath = '/'; + endpath++; + + /* read in the directory and sort */ + dircount = scandir(name, &dirlist, 0, cramsort); + + if (dircount < 0) { + perror(name); + exit(8); + } + + /* process directory */ + for (dirindex = 0; dirindex < dircount; dirindex++) { + struct dirent *dirent; + struct entry *entry; + struct stat st; + int size; + size_t namelen; + + dirent = dirlist[dirindex]; + + /* Ignore "." and ".." - we won't be adding them + to the archive */ + if (dirent->d_name[0] == '.') { + if (dirent->d_name[1] == '\0') + continue; + if (dirent->d_name[1] == '.') { + if (dirent->d_name[2] == '\0') + continue; + } + } + namelen = strlen(dirent->d_name); + if (namelen > MAX_INPUT_NAMELEN) { + fprintf(stderr, + _("Very long (%u bytes) filename `%s' found.\n" + " Please increase MAX_INPUT_NAMELEN in " + "mkcramfs.c and recompile. Exiting.\n"), + namelen, dirent->d_name); + exit(8); + } + memcpy(endpath, dirent->d_name, namelen + 1); + + if (lstat(path, &st) < 0) { + perror(endpath); + warn_skip = 1; + continue; + } + entry = calloc(1, sizeof(struct entry)); + if (!entry) { + perror(NULL); + exit(8); + } + entry->name = strdup(dirent->d_name); + if (!entry->name) { + perror(NULL); + exit(8); + } + if (namelen > 255) { + /* Can't happen when reading from ext2fs. */ + + /* TODO: we ought to avoid chopping in half + multi-byte UTF8 characters. */ + entry->name[namelen = 255] = '\0'; + warn_namelen = 1; + } + entry->mode = st.st_mode; + entry->size = st.st_size; + entry->uid = st.st_uid; + if (entry->uid >= 1 << CRAMFS_UID_WIDTH) + warn_uid = 1; + entry->gid = st.st_gid; + if (entry->gid >= 1 << CRAMFS_GID_WIDTH) + /* TODO: We ought to replace with a default + gid instead of truncating; otherwise there + are security problems. Maybe mode should + be &= ~070. Same goes for uid once Linux + supports >16-bit uids. */ + warn_gid = 1; + size = sizeof(struct cramfs_inode) + ((namelen + 3) & ~3); + *fslen_ub += size; + if (S_ISDIR(st.st_mode)) { + entry->size = parse_directory(root_entry, path, &entry->child, fslen_ub); + } else if (S_ISREG(st.st_mode)) { + /* TODO: We ought to open files in do_compress, one + at a time, instead of amassing all these memory + maps during parse_directory (which don't get used + until do_compress anyway). As it is, we tend to + get EMFILE errors (especially if mkcramfs is run + by non-root). + + While we're at it, do analagously for symlinks + (which would just save a little memory). */ + int fd = open(path, O_RDONLY); + if (fd < 0) { + perror(path); + warn_skip = 1; + continue; + } + if (entry->size) { + if ((entry->size >= 1 << CRAMFS_SIZE_WIDTH)) { + warn_size = 1; + entry->size = (1 << CRAMFS_SIZE_WIDTH) - 1; + } + + entry->uncompressed = mmap(NULL, entry->size, PROT_READ, MAP_PRIVATE, fd, 0); + if (-1 == (int) (long) entry->uncompressed) { + perror("mmap"); + exit(8); + } + } + close(fd); + } else if (S_ISLNK(st.st_mode)) { + entry->uncompressed = malloc(entry->size); + if (!entry->uncompressed) { + perror(NULL); + exit(8); + } + if (readlink(path, entry->uncompressed, entry->size) < 0) { + perror(path); + warn_skip = 1; + continue; + } + } else if (S_ISFIFO(st.st_mode) || S_ISSOCK(st.st_mode)) { + /* maybe we should skip sockets */ + entry->size = 0; + } else { + entry->size = st.st_rdev; + if (entry->size & -(1<<CRAMFS_SIZE_WIDTH)) + warn_dev = 1; + } + + if (S_ISREG(st.st_mode) || S_ISLNK(st.st_mode)) { + int blocks = ((entry->size - 1) / blksize + 1); + + /* block pointers & data expansion allowance + data */ + if(entry->size) + *fslen_ub += (4+26)*blocks + entry->size + 3; + } + + /* Link it into the list */ + *prev = entry; + prev = &entry->next; + totalsize += size; + } + free(path); + free(dirlist); /* allocated by scandir() with malloc() */ + return totalsize; +} + +/* Returns sizeof(struct cramfs_super), which includes the root inode. */ +static unsigned int write_superblock(struct entry *root, char *base, int size) +{ + struct cramfs_super *super = (struct cramfs_super *) base; + unsigned int offset = sizeof(struct cramfs_super) + image_length; + + if (opt_pad) { + offset += opt_pad; + } + + super->magic = CRAMFS_MAGIC; + super->flags = CRAMFS_FLAG_FSID_VERSION_2 | CRAMFS_FLAG_SORTED_DIRS; + if (opt_holes) + super->flags |= CRAMFS_FLAG_HOLES; + if (image_length > 0) + super->flags |= CRAMFS_FLAG_SHIFTED_ROOT_OFFSET; + super->size = size; + memcpy(super->signature, CRAMFS_SIGNATURE, sizeof(super->signature)); + + super->fsid.crc = crc32(0L, Z_NULL, 0); + super->fsid.edition = opt_edition; + super->fsid.blocks = total_blocks; + super->fsid.files = total_nodes; + + memset(super->name, 0x00, sizeof(super->name)); + if (opt_name) + strncpy(super->name, opt_name, sizeof(super->name)); + else + strncpy(super->name, "Compressed", sizeof(super->name)); + + super->root.mode = root->mode; + super->root.uid = root->uid; + super->root.gid = root->gid; + super->root.size = root->size; + super->root.offset = offset >> 2; + + return offset; +} + +static void set_data_offset(struct entry *entry, char *base, unsigned long offset) +{ + struct cramfs_inode *inode = (struct cramfs_inode *) (base + entry->dir_offset); + if (offset >= (1 << (2 + CRAMFS_OFFSET_WIDTH))) { + fprintf(stderr, _("filesystem too big. Exiting.\n")); + exit(8); + } + inode->offset = (offset >> 2); +} + + +/* + * We do a width-first printout of the directory + * entries, using a stack to remember the directories + * we've seen. + */ +#define MAXENTRIES (100) +static unsigned int write_directory_structure(struct entry *entry, char *base, unsigned int offset) +{ + int stack_entries = 0; + struct entry *entry_stack[MAXENTRIES]; + + for (;;) { + int dir_start = stack_entries; + while (entry) { + struct cramfs_inode *inode = + (struct cramfs_inode *) (base + offset); + size_t len = strlen(entry->name); + + entry->dir_offset = offset; + + inode->mode = entry->mode; + inode->uid = entry->uid; + inode->gid = entry->gid; + inode->size = entry->size; + inode->offset = 0; + /* Non-empty directories, regfiles and symlinks will + write over inode->offset later. */ + + offset += sizeof(struct cramfs_inode); + total_nodes++; /* another node */ + memcpy(base + offset, entry->name, len); + /* Pad up the name to a 4-byte boundary */ + while (len & 3) { + *(base + offset + len) = '\0'; + len++; + } + inode->namelen = len >> 2; + offset += len; + + if (verbose) + printf(" %s\n", entry->name); + if (entry->child) { + if (stack_entries >= MAXENTRIES) { + fprintf(stderr, + _("Exceeded MAXENTRIES. Raise" + " this value in mkcramfs.c " + "and recompile. Exiting.\n") + ); + exit(8); + } + entry_stack[stack_entries] = entry; + stack_entries++; + } + entry = entry->next; + } + + /* + * Reverse the order the stack entries pushed during + * this directory, for a small optimization of disk + * access in the created fs. This change makes things + * `ls -UR' order. + */ + { + struct entry **lo = entry_stack + dir_start; + struct entry **hi = entry_stack + stack_entries; + struct entry *tmp; + + while (lo < --hi) { + tmp = *lo; + *lo++ = *hi; + *hi = tmp; + } + } + + /* Pop a subdirectory entry from the stack, and recurse. */ + if (!stack_entries) + break; + stack_entries--; + entry = entry_stack[stack_entries]; + + set_data_offset(entry, base, offset); + if (verbose) + printf("'%s':\n", entry->name); + entry = entry->child; + } + return offset; +} + +static int is_zero(char const *begin, unsigned len) +{ + if (opt_holes) + /* Returns non-zero iff the first LEN bytes from BEGIN are + all NULs. */ + return (len-- == 0 || + (begin[0] == '\0' && + (len-- == 0 || + (begin[1] == '\0' && + (len-- == 0 || + (begin[2] == '\0' && + (len-- == 0 || + (begin[3] == '\0' && + memcmp(begin, begin + 4, len) == 0)))))))); + else + /* Never create holes. */ + return 0; +} + +/* + * One 4-byte pointer per block and then the actual blocked + * output. The first block does not need an offset pointer, + * as it will start immediately after the pointer block; + * so the i'th pointer points to the end of the i'th block + * (i.e. the start of the (i+1)'th block or past EOF). + * + * Note that size > 0, as a zero-sized file wouldn't ever + * have gotten here in the first place. + */ +static unsigned int do_compress(char *base, unsigned int offset, char const *name, char *uncompressed, unsigned int size) +{ + unsigned long original_size = size; + unsigned long original_offset = offset; + unsigned long new_size; + unsigned long blocks = (size - 1) / blksize + 1; + unsigned long curr = offset + 4 * blocks; + int change; + + total_blocks += blocks; + + do { + unsigned long len = 2 * blksize; + unsigned int input = size; + if (input > blksize) + input = blksize; + size -= input; + if (!is_zero (uncompressed, input)) { + compress(base + curr, &len, uncompressed, input); + curr += len; + } + uncompressed += input; + + if (len > blksize*2) { + /* (I don't think this can happen with zlib.) */ + printf(_("AIEEE: block \"compressed\" to > " + "2*blocklength (%ld)\n"), + len); + exit(8); + } + + *(u32 *) (base + offset) = curr; + offset += 4; + } while (size); + + curr = (curr + 3) & ~3; + new_size = curr - original_offset; + /* TODO: Arguably, original_size in these 2 lines should be + st_blocks * 512. But if you say that then perhaps + administrative data should also be included in both. */ + change = new_size - original_size; + if (verbose) + printf(_("%6.2f%% (%+d bytes)\t%s\n"), + (change * 100) / (double) original_size, change, name); + + return curr; +} + + +/* + * Traverse the entry tree, writing data for every item that has + * non-null entry->compressed (i.e. every symlink and non-empty + * regfile). + */ +static unsigned int write_data(struct entry *entry, char *base, unsigned int offset) +{ + do { + if (entry->uncompressed) { + if(entry->same) { + set_data_offset(entry, base, entry->same->offset); + entry->offset=entry->same->offset; + } else { + set_data_offset(entry, base, offset); + entry->offset=offset; + offset = do_compress(base, offset, entry->name, entry->uncompressed, entry->size); + } + } + else if (entry->child) + offset = write_data(entry->child, base, offset); + entry=entry->next; + } while (entry); + return offset; +} + +static unsigned int write_file(char *file, char *base, unsigned int offset) +{ + int fd; + char *buf; + + fd = open(file, O_RDONLY); + if (fd < 0) { + perror(file); + exit(8); + } + buf = mmap(NULL, image_length, PROT_READ, MAP_PRIVATE, fd, 0); + memcpy(base + offset, buf, image_length); + munmap(buf, image_length); + close (fd); + /* Pad up the image_length to a 4-byte boundary */ + while (image_length & 3) { + *(base + offset + image_length) = '\0'; + image_length++; + } + return (offset + image_length); +} + +/* + * Maximum size fs you can create is roughly 256MB. (The last file's + * data must begin within 256MB boundary but can extend beyond that.) + * + * Note that if you want it to fit in a ROM then you're limited to what the + * hardware and kernel can support (64MB?). + */ +#define MAXFSLEN ((((1 << CRAMFS_OFFSET_WIDTH) - 1) << 2) /* offset */ \ + + (1 << CRAMFS_SIZE_WIDTH) - 1 /* filesize */ \ + + (1 << CRAMFS_SIZE_WIDTH) * 4 / PAGE_CACHE_SIZE /* block pointers */ ) + + +/* + * Usage: + * + * mkcramfs directory-name outfile + * + * where "directory-name" is simply the root of the directory + * tree that we want to generate a compressed filesystem out + * of. + */ +int main(int argc, char **argv) +{ + struct stat st; /* used twice... */ + struct entry *root_entry; + char *rom_image; + ssize_t offset, written; + int fd; + /* initial guess (upper-bound) of required filesystem size */ + loff_t fslen_ub = sizeof(struct cramfs_super); + char const *dirname, *outfile; + u32 crc = crc32(0L, Z_NULL, 0); + int c; /* for getopt */ + + total_blocks = 0; + + if (argc) { + char *p; + progname = argv[0]; + if ((p = strrchr(progname, '/')) != NULL) + progname = p+1; + } + + /* command line options */ + while ((c = getopt(argc, argv, "hEe:i:n:psVvz")) != EOF) { + switch (c) { + case 'h': + usage(0); + case 'E': + opt_errors = 1; + break; + case 'e': + opt_edition = atoi(optarg); + break; + case 'i': + opt_image = optarg; + if (lstat(opt_image, &st) < 0) { + perror(opt_image); + exit(16); + } + image_length = st.st_size; /* may be padded later */ + fslen_ub += (image_length + 3); /* 3 is for padding */ + break; + case 'n': + opt_name = optarg; + break; + case 'p': + opt_pad = PAD_SIZE; + fslen_ub += PAD_SIZE; + break; + case 's': + /* old option, ignored */ + break; + case 'V': + printf(_("%s from %s\n"), + progname, util_linux_version); + exit(0); + case 'v': + verbose = 1; + break; + case 'z': + opt_holes = 1; + break; + } + } + + if ((argc - optind) != 2) + usage(16); + dirname = argv[optind]; + outfile = argv[optind + 1]; + + if (stat(dirname, &st) < 0) { + perror(dirname); + exit(16); + } + fd = open(outfile, O_WRONLY | O_CREAT | O_TRUNC, 0666); + + root_entry = calloc(1, sizeof(struct entry)); + if (!root_entry) { + perror(NULL); + exit(8); + } + root_entry->mode = st.st_mode; + root_entry->uid = st.st_uid; + root_entry->gid = st.st_gid; + + root_entry->size = parse_directory(root_entry, dirname, &root_entry->child, &fslen_ub); + + /* always allocate a multiple of blksize bytes because that's + what we're going to write later on */ + fslen_ub = ((fslen_ub - 1) | (blksize - 1)) + 1; + + if (fslen_ub > MAXFSLEN) { + fprintf(stderr, + _("warning: guestimate of required size (upper bound) " + "is %LdMB, but maximum image size is %uMB. " + "We might die prematurely.\n"), + fslen_ub >> 20, + MAXFSLEN >> 20); + fslen_ub = MAXFSLEN; + } + + /* find duplicate files. TODO: uses the most inefficient algorithm + possible. */ + eliminate_doubles(root_entry,root_entry); + + /* TODO: Why do we use a private/anonymous mapping here + followed by a write below, instead of just a shared mapping + and a couple of ftruncate calls? Is it just to save us + having to deal with removing the file afterwards? If we + really need this huge anonymous mapping, we ought to mmap + in smaller chunks, so that the user doesn't need nn MB of + RAM free. If the reason is to be able to write to + un-mmappable block devices, then we could try shared mmap + and revert to anonymous mmap if the shared mmap fails. */ + rom_image = mmap(NULL, + fslen_ub?fslen_ub:1, + PROT_READ | PROT_WRITE, + MAP_PRIVATE | MAP_ANONYMOUS, + -1, 0); + + if (-1 == (int) (long) rom_image) { + perror("ROM image map"); + exit(8); + } + + /* Skip the first opt_pad bytes for boot loader code */ + offset = opt_pad; + memset(rom_image, 0x00, opt_pad); + + /* Skip the superblock and come back to write it later. */ + offset += sizeof(struct cramfs_super); + + /* Insert a file image. */ + if (opt_image) { + if (verbose) + printf(_("Including: %s\n"), opt_image); + offset = write_file(opt_image, rom_image, offset); + } + + offset = write_directory_structure(root_entry->child, rom_image, offset); + if (verbose) + printf(_("Directory data: %d bytes\n"), offset); + + offset = write_data(root_entry, rom_image, offset); + + /* We always write a multiple of blksize bytes, so that + losetup works. */ + offset = ((offset - 1) | (blksize - 1)) + 1; + if (verbose) + printf(_("Everything: %d kilobytes\n"), offset >> 10); + + /* Write the superblock now that we can fill in all of the fields. */ + write_superblock(root_entry, rom_image+opt_pad, offset); + if (verbose) + printf(_("Super block: %d bytes\n"), + sizeof(struct cramfs_super)); + + /* Put the checksum in. */ + crc = crc32(crc, (rom_image+opt_pad), (offset-opt_pad)); + ((struct cramfs_super *) (rom_image+opt_pad))->fsid.crc = crc; + if (verbose) + printf(_("CRC: %x\n"), crc); + + /* Check to make sure we allocated enough space. */ + if (fslen_ub < offset) { + fprintf(stderr, + _("not enough space allocated for ROM image " + "(%Ld allocated, %d used)\n"), + fslen_ub, offset); + exit(8); + } + + written = write(fd, rom_image, offset); + if (written < 0) { + perror("ROM image"); + exit(8); + } + if (offset != written) { + fprintf(stderr, _("ROM image write failed (%d %d)\n"), + written, offset); + exit(8); + } + + /* (These warnings used to come at the start, but they scroll off the + screen too quickly.) */ + if (warn_namelen) /* (can't happen when reading from ext2fs) */ + fprintf(stderr, /* bytes, not chars: think UTF8. */ + _("warning: filenames truncated to 255 bytes.\n")); + if (warn_skip) + fprintf(stderr, + _("warning: files were skipped due to errors.\n")); + if (warn_size) + fprintf(stderr, + _("warning: file sizes truncated to %luMB " + "(minus 1 byte).\n"), + 1L << (CRAMFS_SIZE_WIDTH - 20)); + if (warn_uid) /* (not possible with current Linux versions) */ + fprintf(stderr, + _("warning: uids truncated to %u bits. " + "(This may be a security concern.)\n"), + CRAMFS_UID_WIDTH); + if (warn_gid) + fprintf(stderr, + _("warning: gids truncated to %u bits. " + "(This may be a security concern.)\n"), + CRAMFS_GID_WIDTH); + if (warn_dev) + fprintf(stderr, + _("WARNING: device numbers truncated to %u bits. " + "This almost certainly means\n" + "that some device files will be wrong.\n"), + CRAMFS_OFFSET_WIDTH); + if (opt_errors && + (warn_namelen|warn_skip|warn_size|warn_uid|warn_gid|warn_dev)) + exit(8); + return 0; +} |