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kumquat-buildroot/package/cramfs/cramfs-01-devtable.patch
Thomas Petazzoni f601bb72db cramfs: new package 
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
2010-04-09 11:03:54 +02:00

1270 lines
36 KiB
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--- cramfs-1.1.orig/cramfsck.c 2002-02-22 17:00:42.000000000 -0700
+++ cramfs-1.1/cramfsck.c 2002-12-21 01:25:17.000000000 -0700
@@ -51,10 +51,11 @@
#include <utime.h>
#include <sys/ioctl.h>
#define _LINUX_STRING_H_
-#include <linux/fs.h>
-#include <linux/cramfs_fs.h>
+#include "linux/cramfs_fs.h"
#include <zlib.h>
+#define BLKGETSIZE _IO(0x12,96) /* return device size /512 (long *arg) */
+
/* Exit codes used by fsck-type programs */
#define FSCK_OK 0 /* No errors */
#define FSCK_NONDESTRUCT 1 /* File system errors corrected */
@@ -75,7 +76,7 @@
static int opt_verbose = 0; /* 1 = verbose (-v), 2+ = very verbose (-vv) */
#ifdef INCLUDE_FS_TESTS
static int opt_extract = 0; /* extract cramfs (-x) */
-static char *extract_dir = "root"; /* extraction directory (-x) */
+static char *extract_dir = "/"; /* extraction directory (-x) */
static uid_t euid; /* effective UID */
/* (cramfs_super + start) <= start_dir < end_dir <= start_data <= end_data */
@@ -155,7 +156,7 @@
}
if (*length < sizeof(struct cramfs_super)) {
- die(FSCK_UNCORRECTED, 0, "file length too short");
+ die(FSCK_UNCORRECTED, 0, "filesystem smaller than a cramfs superblock!");
}
/* find superblock */
@@ -190,7 +191,8 @@
die(FSCK_UNCORRECTED, 0, "zero file count");
}
if (*length < super.size) {
- die(FSCK_UNCORRECTED, 0, "file length too short");
+ die(FSCK_UNCORRECTED, 0, "file length too short, %lu is smaller than %lu",
+ *length, super.size);
}
else if (*length > super.size) {
fprintf(stderr, "warning: file extends past end of filesystem\n");
@@ -267,11 +269,11 @@
#ifdef INCLUDE_FS_TESTS
static void print_node(char type, struct cramfs_inode *i, char *name)
{
- char info[10];
+ char info[11];
if (S_ISCHR(i->mode) || (S_ISBLK(i->mode))) {
/* major/minor numbers can be as high as 2^12 or 4096 */
- snprintf(info, 10, "%4d,%4d", major(i->size), minor(i->size));
+ snprintf(info, 11, "%4d,%4d", major(i->size), minor(i->size));
}
else {
/* size be as high as 2^24 or 16777216 */
@@ -445,8 +447,10 @@
}
/* TODO: Do we need to check end_dir for empty case? */
memcpy(newpath, path, pathlen);
- newpath[pathlen] = '/';
- pathlen++;
+ if (pathlen > 1) {
+ newpath[pathlen] = '/';
+ pathlen++;
+ }
if (opt_verbose) {
print_node('d', i, path);
}
--- cramfs-1.1.orig/device_table.txt 1969-12-31 17:00:00.000000000 -0700
+++ cramfs-1.1/device_table.txt 2003-01-01 05:13:44.000000000 -0700
@@ -0,0 +1,129 @@
+# When building a target filesystem, it is desirable to not have to
+# become root and then run 'mknod' a thousand times. Using a device
+# table you can create device nodes and directories "on the fly".
+#
+# This is a sample device table file for use with mkcramfs. You can
+# do all sorts of interesting things with a device table file. For
+# example, if you want to adjust the permissions on a particular file
+# you can just add an entry like:
+# /sbin/foobar f 2755 0 0 - - - - -
+# and (assuming the file /sbin/foobar exists) it will be made setuid
+# root (regardless of what its permissions are on the host filesystem.
+# Furthermore, you can use a single table entry to create a many device
+# minors. For example, if I wanted to create /dev/hda and /dev/hda[0-15]
+# I could just use the following two table entries:
+# /dev/hda b 640 0 0 3 0 0 0 -
+# /dev/hda b 640 0 0 3 1 1 1 15
+#
+# Device table entries take the form of:
+# <name> <type> <mode> <uid> <gid> <major> <minor> <start> <inc> <count>
+# where name is the file name, type can be one of:
+# f A regular file
+# d Directory
+# c Character special device file
+# b Block special device file
+# p Fifo (named pipe)
+# uid is the user id for the target file, gid is the group id for the
+# target file. The rest of the entries (major, minor, etc) apply only
+# to device special files.
+
+# Have fun
+# -Erik Andersen <andersen@codepoet.org>
+#
+
+#<name> <type> <mode> <uid> <gid> <major> <minor> <start> <inc> <count>
+/dev d 755 0 0 - - - - -
+/dev/mem c 640 0 0 1 1 0 0 -
+/dev/kmem c 640 0 0 1 2 0 0 -
+/dev/null c 640 0 0 1 3 0 0 -
+/dev/zero c 640 0 0 1 5 0 0 -
+/dev/random c 640 0 0 1 8 0 0 -
+/dev/urandom c 640 0 0 1 9 0 0 -
+/dev/tty c 666 0 0 5 0 0 0 -
+/dev/tty c 666 0 0 4 0 0 1 6
+/dev/console c 640 0 0 5 1 0 0 -
+/dev/ram b 640 0 0 1 1 0 0 -
+/dev/ram b 640 0 0 1 0 0 1 4
+/dev/loop b 640 0 0 7 0 0 1 2
+/dev/ptmx c 666 0 0 5 2 0 0 -
+#/dev/ttyS c 640 0 0 4 64 0 1 4
+#/dev/psaux c 640 0 0 10 1 0 0 -
+#/dev/rtc c 640 0 0 10 135 0 0 -
+
+# Adjust permissions on some normal files
+#/etc/shadow f 600 0 0 - - - - -
+#/bin/tinylogin f 4755 0 0 - - - - -
+
+# User-mode Linux stuff
+/dev/ubda b 640 0 0 98 0 0 0 -
+/dev/ubda b 640 0 0 98 1 1 1 15
+
+# IDE Devices
+/dev/hda b 640 0 0 3 0 0 0 -
+/dev/hda b 640 0 0 3 1 1 1 15
+/dev/hdb b 640 0 0 3 64 0 0 -
+/dev/hdb b 640 0 0 3 65 1 1 15
+#/dev/hdc b 640 0 0 22 0 0 0 -
+#/dev/hdc b 640 0 0 22 1 1 1 15
+#/dev/hdd b 640 0 0 22 64 0 0 -
+#/dev/hdd b 640 0 0 22 65 1 1 15
+#/dev/hde b 640 0 0 33 0 0 0 -
+#/dev/hde b 640 0 0 33 1 1 1 15
+#/dev/hdf b 640 0 0 33 64 0 0 -
+#/dev/hdf b 640 0 0 33 65 1 1 15
+#/dev/hdg b 640 0 0 34 0 0 0 -
+#/dev/hdg b 640 0 0 34 1 1 1 15
+#/dev/hdh b 640 0 0 34 64 0 0 -
+#/dev/hdh b 640 0 0 34 65 1 1 15
+
+# SCSI Devices
+#/dev/sda b 640 0 0 8 0 0 0 -
+#/dev/sda b 640 0 0 8 1 1 1 15
+#/dev/sdb b 640 0 0 8 16 0 0 -
+#/dev/sdb b 640 0 0 8 17 1 1 15
+#/dev/sdc b 640 0 0 8 32 0 0 -
+#/dev/sdc b 640 0 0 8 33 1 1 15
+#/dev/sdd b 640 0 0 8 48 0 0 -
+#/dev/sdd b 640 0 0 8 49 1 1 15
+#/dev/sde b 640 0 0 8 64 0 0 -
+#/dev/sde b 640 0 0 8 65 1 1 15
+#/dev/sdf b 640 0 0 8 80 0 0 -
+#/dev/sdf b 640 0 0 8 81 1 1 15
+#/dev/sdg b 640 0 0 8 96 0 0 -
+#/dev/sdg b 640 0 0 8 97 1 1 15
+#/dev/sdh b 640 0 0 8 112 0 0 -
+#/dev/sdh b 640 0 0 8 113 1 1 15
+#/dev/sg c 640 0 0 21 0 0 1 15
+#/dev/scd b 640 0 0 11 0 0 1 15
+#/dev/st c 640 0 0 9 0 0 1 8
+#/dev/nst c 640 0 0 9 128 0 1 8
+#/dev/st c 640 0 0 9 32 1 1 4
+#/dev/st c 640 0 0 9 64 1 1 4
+#/dev/st c 640 0 0 9 96 1 1 4
+
+# Floppy disk devices
+#/dev/fd b 640 0 0 2 0 0 1 2
+#/dev/fd0d360 b 640 0 0 2 4 0 0 -
+#/dev/fd1d360 b 640 0 0 2 5 0 0 -
+#/dev/fd0h1200 b 640 0 0 2 8 0 0 -
+#/dev/fd1h1200 b 640 0 0 2 9 0 0 -
+#/dev/fd0u1440 b 640 0 0 2 28 0 0 -
+#/dev/fd1u1440 b 640 0 0 2 29 0 0 -
+#/dev/fd0u2880 b 640 0 0 2 32 0 0 -
+#/dev/fd1u2880 b 640 0 0 2 33 0 0 -
+
+# All the proprietary cdrom devices in the world
+#/dev/aztcd b 640 0 0 29 0 0 0 -
+#/dev/bpcd b 640 0 0 41 0 0 0 -
+#/dev/capi20 c 640 0 0 68 0 0 1 2
+#/dev/cdu31a b 640 0 0 15 0 0 0 -
+#/dev/cdu535 b 640 0 0 24 0 0 0 -
+#/dev/cm206cd b 640 0 0 32 0 0 0 -
+#/dev/sjcd b 640 0 0 18 0 0 0 -
+#/dev/sonycd b 640 0 0 15 0 0 0 -
+#/dev/gscd b 640 0 0 16 0 0 0 -
+#/dev/sbpcd b 640 0 0 25 0 0 0 -
+#/dev/sbpcd b 640 0 0 25 0 0 1 4
+#/dev/mcd b 640 0 0 23 0 0 0 -
+#/dev/optcd b 640 0 0 17 0 0 0 -
+
--- cramfs-1.1.orig/mkcramfs.c 2002-02-20 01:03:32.000000000 -0700
+++ cramfs-1.1/mkcramfs.c 2002-12-21 01:25:17.000000000 -0700
@@ -1,3 +1,4 @@
+/* vi: set sw=8 ts=8: */
/*
* mkcramfs - make a cramfs file system
*
@@ -16,12 +17,21 @@
* 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
+ *
+ * Added device table support (code taken from mkfs.jffs2.c, credit to
+ * Erik Andersen <andersen@codepoet.org>) as well as an option to squash
+ * permissions. - Russ Dill <Russ.Dill@asu.edu> September 2002
+ *
+ * Reworked, cleaned up, and updated for cramfs-1.1, December 2002
+ * - Erik Andersen <andersen@codepoet.org>
+ *
*/
/*
* If you change the disk format of cramfs, please update fs/cramfs/README.
*/
+#define _GNU_SOURCE
#include <sys/types.h>
#include <stdio.h>
#include <sys/stat.h>
@@ -33,8 +43,15 @@
#include <errno.h>
#include <string.h>
#include <stdarg.h>
+#include <libgen.h>
+#include <ctype.h>
+#include <assert.h>
+#include <getopt.h>
#include <linux/cramfs_fs.h>
#include <zlib.h>
+#ifdef DMALLOC
+#include <dmalloc.h>
+#endif
/* Exit codes used by mkfs-type programs */
#define MKFS_OK 0 /* No errors */
@@ -71,11 +88,17 @@
+ (1 << CRAMFS_SIZE_WIDTH) - 1 /* filesize */ \
+ (1 << CRAMFS_SIZE_WIDTH) * 4 / PAGE_CACHE_SIZE /* block pointers */ )
+
+/* The kernel assumes PAGE_CACHE_SIZE as block size. */
+#define PAGE_CACHE_SIZE (4096)
+
+
static const char *progname = "mkcramfs";
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
@@ -91,10 +114,12 @@
static int opt_holes = 0;
static int opt_pad = 0;
static int opt_verbose = 0;
+static int opt_squash = 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;
+static const char *const memory_exhausted = "memory exhausted";
/* In-core version of inode / directory entry. */
struct entry {
@@ -123,7 +148,7 @@
{
FILE *stream = status ? stderr : stdout;
- fprintf(stream, "usage: %s [-h] [-e edition] [-i file] [-n name] dirname outfile\n"
+ fprintf(stream, "usage: %s [-h] [-e edition] [-i file] [-n name] [-D file] dirname outfile\n"
" -h print this help\n"
" -E make all warnings errors (non-zero exit status)\n"
" -e edition set edition number (part of fsid)\n"
@@ -133,39 +158,157 @@
" -s sort directory entries (old option, ignored)\n"
" -v be more verbose\n"
" -z make explicit holes (requires >= 2.3.39)\n"
- " dirname root of the directory tree to be compressed\n"
+ " -D Use the named FILE as a device table file\n"
+ " -q squash permissions (make everything owned by root)\n"
+ " dirname root of the filesystem to be compressed\n"
" outfile output file\n", progname, PAD_SIZE);
exit(status);
}
-static void die(int status, int syserr, const char *fmt, ...)
+static void verror_msg(const char *s, va_list p)
+{
+ fflush(stdout);
+ fprintf(stderr, "mkcramfs: ");
+ vfprintf(stderr, s, p);
+}
+
+static void vperror_msg(const char *s, va_list p)
+{
+ int err = errno;
+
+ if (s == 0)
+ s = "";
+ verror_msg(s, p);
+ if (*s)
+ s = ": ";
+ fprintf(stderr, "%s%s\n", s, strerror(err));
+}
+
+static void perror_msg(const char *s, ...)
+{
+ va_list p;
+
+ va_start(p, s);
+ vperror_msg(s, p);
+ va_end(p);
+}
+
+static void error_msg_and_die(const char *s, ...)
+{
+ va_list p;
+
+ va_start(p, s);
+ verror_msg(s, p);
+ va_end(p);
+ putc('\n', stderr);
+ exit(MKFS_ERROR);
+}
+
+static void perror_msg_and_die(const char *s, ...)
+{
+ va_list p;
+
+ va_start(p, s);
+ vperror_msg(s, p);
+ va_end(p);
+ exit(MKFS_ERROR);
+}
+#ifndef DMALLOC
+extern char *xstrdup(const char *s)
+{
+ char *t;
+
+ if (s == NULL)
+ return NULL;
+ t = strdup(s);
+ if (t == NULL)
+ error_msg_and_die(memory_exhausted);
+ return t;
+}
+
+extern void *xmalloc(size_t size)
+{
+ void *ptr = malloc(size);
+
+ if (ptr == NULL && size != 0)
+ error_msg_and_die(memory_exhausted);
+ return ptr;
+}
+
+extern void *xcalloc(size_t nmemb, size_t size)
+{
+ void *ptr = calloc(nmemb, size);
+
+ if (ptr == NULL && nmemb != 0 && size != 0)
+ error_msg_and_die(memory_exhausted);
+ return ptr;
+}
+
+extern void *xrealloc(void *ptr, size_t size)
+{
+ ptr = realloc(ptr, size);
+ if (ptr == NULL && size != 0)
+ error_msg_and_die(memory_exhausted);
+ return ptr;
+}
+#endif
+
+static FILE *xfopen(const char *path, const char *mode)
{
- va_list arg_ptr;
- int save = errno;
+ FILE *fp;
+
+ if ((fp = fopen(path, mode)) == NULL)
+ perror_msg_and_die("%s", path);
+ return fp;
+}
- fflush(0);
- va_start(arg_ptr, fmt);
- fprintf(stderr, "%s: ", progname);
- vfprintf(stderr, fmt, arg_ptr);
- if (syserr) {
- fprintf(stderr, ": %s", strerror(save));
+extern int xopen(const char *pathname, int flags, mode_t mode)
+{
+ int ret;
+
+ if (flags & O_CREAT)
+ ret = open(pathname, flags, mode);
+ else
+ ret = open(pathname, flags);
+ if (ret == -1) {
+ perror_msg_and_die("%s", pathname);
}
- fprintf(stderr, "\n");
- va_end(arg_ptr);
- exit(status);
+ return ret;
}
+extern char *xreadlink(const char *path)
+{
+ static const int GROWBY = 80; /* how large we will grow strings by */
+
+ char *buf = NULL;
+ int bufsize = 0, readsize = 0;
+
+ do {
+ buf = xrealloc(buf, bufsize += GROWBY);
+ readsize = readlink(path, buf, bufsize); /* 1st try */
+ if (readsize == -1) {
+ perror_msg("%s:%s", progname, path);
+ return NULL;
+ }
+ }
+ while (bufsize < readsize + 1);
+
+ buf[readsize] = '\0';
+
+ return buf;
+}
+
static void map_entry(struct entry *entry)
{
if (entry->path) {
entry->fd = open(entry->path, O_RDONLY);
if (entry->fd < 0) {
- die(MKFS_ERROR, 1, "open failed: %s", entry->path);
+ error_msg_and_die("open failed: %s", entry->path);
}
entry->uncompressed = mmap(NULL, entry->size, PROT_READ, MAP_PRIVATE, entry->fd, 0);
if (entry->uncompressed == MAP_FAILED) {
- die(MKFS_ERROR, 1, "mmap failed: %s", entry->path);
+ error_msg_and_die("mmap failed: %s", entry->path);
}
}
}
@@ -174,8 +317,9 @@
{
if (entry->path) {
if (munmap(entry->uncompressed, entry->size) < 0) {
- die(MKFS_ERROR, 1, "munmap failed: %s", entry->path);
+ error_msg_and_die("munmap failed: %s", entry->path);
}
+ entry->uncompressed=NULL;
close(entry->fd);
}
}
@@ -204,7 +348,8 @@
find_identical_file(orig->next, newfile));
}
-static void eliminate_doubles(struct entry *root, struct entry *orig) {
+static void eliminate_doubles(struct entry *root, struct entry *orig)
+{
if (orig) {
if (orig->size && (orig->path || orig->uncompressed))
find_identical_file(root, orig);
@@ -232,10 +377,7 @@
/* 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) {
- die(MKFS_ERROR, 1, "malloc failed");
- }
+ path = xmalloc(len + 1 + MAX_INPUT_NAMELEN + 1);
memcpy(path, name, len);
endpath = path + len;
*endpath = '/';
@@ -245,7 +387,7 @@
dircount = scandir(name, &dirlist, 0, cramsort);
if (dircount < 0) {
- die(MKFS_ERROR, 1, "scandir failed: %s", name);
+ error_msg_and_die("scandir failed: %s", name);
}
/* process directory */
@@ -269,25 +411,20 @@
}
namelen = strlen(dirent->d_name);
if (namelen > MAX_INPUT_NAMELEN) {
- die(MKFS_ERROR, 0,
- "very long (%u bytes) filename found: %s\n"
- "please increase MAX_INPUT_NAMELEN in mkcramfs.c and recompile",
+ error_msg_and_die(
+ "Very long (%u bytes) filename `%s' found.\n"
+ " Please increase MAX_INPUT_NAMELEN in mkcramfs.c and recompile. Exiting.\n",
namelen, dirent->d_name);
}
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) {
- die(MKFS_ERROR, 1, "calloc failed");
- }
- entry->name = strdup(dirent->d_name);
- if (!entry->name) {
- die(MKFS_ERROR, 1, "strdup failed");
- }
+ entry = xcalloc(1, sizeof(struct entry));
+ entry->name = xstrdup(dirent->d_name);
/* truncate multi-byte UTF-8 filenames on character boundary */
if (namelen > CRAMFS_MAXPATHLEN) {
namelen = CRAMFS_MAXPATHLEN;
@@ -297,24 +434,25 @@
namelen--;
/* are we reasonably certain it was UTF-8 ? */
if (entry->name[namelen] < 0x80 || !namelen) {
- die(MKFS_ERROR, 0, "cannot truncate filenames not encoded in UTF-8");
+ error_msg_and_die("cannot truncate filenames not encoded in UTF-8");
}
}
entry->name[namelen] = '\0';
}
entry->mode = st.st_mode;
entry->size = st.st_size;
- entry->uid = st.st_uid;
+ entry->uid = opt_squash ? 0 : 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)
+ entry->gid = opt_squash ? 0 : 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)) {
@@ -325,21 +463,15 @@
warn_skip = 1;
continue;
}
- entry->path = strdup(path);
- if (!entry->path) {
- die(MKFS_ERROR, 1, "strdup failed");
- }
+ entry->path = xstrdup(path);
if ((entry->size >= 1 << CRAMFS_SIZE_WIDTH)) {
warn_size = 1;
entry->size = (1 << CRAMFS_SIZE_WIDTH) - 1;
}
}
} else if (S_ISLNK(st.st_mode)) {
- entry->uncompressed = malloc(entry->size);
+ entry->uncompressed = xreadlink(path);
if (!entry->uncompressed) {
- die(MKFS_ERROR, 1, "malloc failed");
- }
- if (readlink(path, entry->uncompressed, entry->size) < 0) {
warn_skip = 1;
continue;
}
@@ -351,7 +483,7 @@
if (entry->size & -(1<<CRAMFS_SIZE_WIDTH))
warn_dev = 1;
} else {
- die(MKFS_ERROR, 0, "bogus file type: %s", entry->name);
+ error_msg_and_die("bogus file type: %s", entry->name);
}
if (S_ISREG(st.st_mode) || S_ISLNK(st.st_mode)) {
@@ -378,7 +510,9 @@
struct cramfs_super *super = (struct cramfs_super *) base;
unsigned int offset = sizeof(struct cramfs_super) + image_length;
- offset += opt_pad; /* 0 if no padding */
+ if (opt_pad) {
+ offset += opt_pad; /* 0 if no padding */
+ }
super->magic = CRAMFS_MAGIC;
super->flags = CRAMFS_FLAG_FSID_VERSION_2 | CRAMFS_FLAG_SORTED_DIRS;
@@ -414,10 +548,10 @@
struct cramfs_inode *inode = (struct cramfs_inode *) (base + entry->dir_offset);
if ((offset & 3) != 0) {
- die(MKFS_ERROR, 0, "illegal offset of %lu bytes", offset);
+ error_msg_and_die("illegal offset of %lu bytes", offset);
}
if (offset >= (1 << (2 + CRAMFS_OFFSET_WIDTH))) {
- die(MKFS_ERROR, 0, "filesystem too big");
+ error_msg_and_die("filesystem too big");
}
inode->offset = (offset >> 2);
}
@@ -429,7 +563,7 @@
*/
static void print_node(struct entry *e)
{
- char info[10];
+ char info[12];
char type = '?';
if (S_ISREG(e->mode)) type = 'f';
@@ -442,11 +576,11 @@
if (S_ISCHR(e->mode) || (S_ISBLK(e->mode))) {
/* major/minor numbers can be as high as 2^12 or 4096 */
- snprintf(info, 10, "%4d,%4d", major(e->size), minor(e->size));
+ snprintf(info, 11, "%4d,%4d", major(e->size), minor(e->size));
}
else {
/* size be as high as 2^24 or 16777216 */
- snprintf(info, 10, "%9d", e->size);
+ snprintf(info, 11, "%9d", e->size);
}
printf("%c %04o %s %5d:%-3d %s\n",
@@ -462,17 +596,9 @@
{
int stack_entries = 0;
int stack_size = 64;
- struct entry **entry_stack;
-
- entry_stack = malloc(stack_size * sizeof(struct entry *));
- if (!entry_stack) {
- die(MKFS_ERROR, 1, "malloc failed");
- }
-
- if (opt_verbose) {
- printf("root:\n");
- }
+ struct entry **entry_stack = NULL;
+ entry_stack = xmalloc(stack_size * sizeof(struct entry *));
for (;;) {
int dir_start = stack_entries;
while (entry) {
@@ -506,10 +632,7 @@
if (entry->child) {
if (stack_entries >= stack_size) {
stack_size *= 2;
- entry_stack = realloc(entry_stack, stack_size * sizeof(struct entry *));
- if (!entry_stack) {
- die(MKFS_ERROR, 1, "realloc failed");
- }
+ entry_stack = xrealloc(entry_stack, stack_size * sizeof(struct entry *));
}
entry_stack[stack_entries] = entry;
stack_entries++;
@@ -543,7 +666,7 @@
set_data_offset(entry, base, offset);
if (opt_verbose) {
- printf("%s:\n", entry->name);
+ printf("'%s':\n", entry->name);
}
entry = entry->child;
}
@@ -553,16 +676,21 @@
static int is_zero(char const *begin, unsigned len)
{
- /* 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))))))));
+ 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;
}
/*
@@ -575,37 +703,34 @@
* 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)
+static unsigned int do_compress(char *base, unsigned int offset, struct entry *entry)
{
+ unsigned int size = entry->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;
+ char *uncompressed = entry->uncompressed;
- total_blocks += blocks;
+ total_blocks += blocks;
do {
unsigned long len = 2 * blksize;
unsigned int input = size;
- int err;
-
if (input > blksize)
input = blksize;
size -= input;
- if (!(opt_holes && is_zero (uncompressed, input))) {
- err = compress2(base + curr, &len, uncompressed, input, Z_BEST_COMPRESSION);
- if (err != Z_OK) {
- die(MKFS_ERROR, 0, "compression error: %s", zError(err));
- }
+ 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.) */
- die(MKFS_ERROR, 0, "AIEEE: block \"compressed\" to > 2*blocklength (%ld)", len);
+ error_msg_and_die("AIEEE: block \"compressed\" to > 2*blocklength (%ld)\n", len);
}
*(u32 *) (base + offset) = curr;
@@ -618,10 +743,12 @@
st_blocks * 512. But if you say that then perhaps
administrative data should also be included in both. */
change = new_size - original_size;
- if (opt_verbose > 1) {
- printf("%6.2f%% (%+d bytes)\t%s\n",
- (change * 100) / (double) original_size, change, name);
+#if 0
+ if (opt_verbose) {
+ printf("%6.2f%% (%+d bytes)\t%s\n",
+ (change * 100) / (double) original_size, change, entry->name);
}
+#endif
return curr;
}
@@ -644,7 +771,7 @@
set_data_offset(entry, base, offset);
entry->offset = offset;
map_entry(entry);
- offset = do_compress(base, offset, entry->name, entry->uncompressed, entry->size);
+ offset = do_compress(base, offset, entry);
unmap_entry(entry);
}
}
@@ -660,13 +787,10 @@
int fd;
char *buf;
- fd = open(file, O_RDONLY);
- if (fd < 0) {
- die(MKFS_ERROR, 1, "open failed: %s", file);
- }
+ fd = xopen(file, O_RDONLY, 0);
buf = mmap(NULL, image_length, PROT_READ, MAP_PRIVATE, fd, 0);
if (buf == MAP_FAILED) {
- die(MKFS_ERROR, 1, "mmap failed");
+ error_msg_and_die("mmap failed");
}
memcpy(base + offset, buf, image_length);
munmap(buf, image_length);
@@ -679,6 +803,328 @@
return (offset + image_length);
}
+static struct entry *find_filesystem_entry(struct entry *dir, char *name, mode_t type)
+{
+ struct entry *e = dir;
+
+ if (S_ISDIR(dir->mode)) {
+ e = dir->child;
+ }
+ while (e) {
+ /* Only bother to do the expensive strcmp on matching file types */
+ if (type == (e->mode & S_IFMT) && e->name) {
+ if (S_ISDIR(e->mode)) {
+ int len = strlen(e->name);
+
+ /* Check if we are a parent of the correct path */
+ if (strncmp(e->name, name, len) == 0) {
+ /* Is this an _exact_ match? */
+ if (strcmp(name, e->name) == 0) {
+ return (e);
+ }
+ /* Looks like we found a parent of the correct path */
+ if (name[len] == '/') {
+ if (e->child) {
+ return (find_filesystem_entry (e, name + len + 1, type));
+ } else {
+ return NULL;
+ }
+ }
+ }
+ } else {
+ if (strcmp(name, e->name) == 0) {
+ return (e);
+ }
+ }
+ }
+ e = e->next;
+ }
+ return (NULL);
+}
+
+void modify_entry(char *full_path, unsigned long uid, unsigned long gid,
+ unsigned long mode, unsigned long rdev, struct entry *root, loff_t *fslen_ub)
+{
+ char *name, *path, *full;
+ struct entry *curr, *parent, *entry, *prev;
+
+ full = xstrdup(full_path);
+ path = xstrdup(dirname(full));
+ name = full_path + strlen(path) + 1;
+ free(full);
+ if (strcmp(path, "/") == 0) {
+ parent = root;
+ name = full_path + 1;
+ } else {
+ if (!(parent = find_filesystem_entry(root, path+1, S_IFDIR)))
+ error_msg_and_die("%s/%s: could not find parent\n", path, name);
+ }
+ if ((entry = find_filesystem_entry(parent, name, (mode & S_IFMT)))) {
+ /* its there, just modify permissions */
+ entry->mode = mode;
+ entry->uid = uid;
+ entry->gid = gid;
+ } else { /* make a new entry */
+
+ /* code partially replicated from parse_directory() */
+ size_t namelen;
+ if (S_ISREG(mode)) {
+ error_msg_and_die("%s: regular file from device_table file must exist on disk!", full_path);
+ }
+
+ namelen = strlen(name);
+ if (namelen > MAX_INPUT_NAMELEN) {
+ error_msg_and_die(
+ "Very long (%u bytes) filename `%s' found.\n"
+ " Please increase MAX_INPUT_NAMELEN in mkcramfs.c and recompile. Exiting.\n",
+ namelen, name);
+ }
+ entry = xcalloc(1, sizeof(struct entry));
+ entry->name = xstrdup(name);
+ /* truncate multi-byte UTF-8 filenames on character boundary */
+ if (namelen > CRAMFS_MAXPATHLEN) {
+ namelen = CRAMFS_MAXPATHLEN;
+ warn_namelen = 1;
+ /* the first lost byte must not be a trail byte */
+ while ((entry->name[namelen] & 0xc0) == 0x80) {
+ namelen--;
+ /* are we reasonably certain it was UTF-8 ? */
+ if (entry->name[namelen] < 0x80 || !namelen) {
+ error_msg_and_die("cannot truncate filenames not encoded in UTF-8");
+ }
+ }
+ entry->name[namelen] = '\0';
+ }
+ entry->mode = mode;
+ entry->uid = uid;
+ entry->gid = gid;
+ entry->size = 0;
+ if (S_ISBLK(mode) || S_ISCHR(mode)) {
+ entry->size = rdev;
+ if (entry->size & -(1<<CRAMFS_SIZE_WIDTH))
+ warn_dev = 1;
+ }
+
+ /* ok, now we have to backup and correct the size of all the entries above us */
+ *fslen_ub += sizeof(struct cramfs_inode) + ((namelen + 3) & ~3);
+ parent->size += sizeof(struct cramfs_inode) + ((namelen + 3) & ~3);
+
+ /* alright, time to link us in */
+ curr = parent->child;
+ prev = NULL;
+ while (curr && strcmp(name, curr->name) > 0) {
+ prev = curr;
+ curr = curr->next;
+ }
+ if (!prev) parent->child = entry;
+ else prev->next = entry;
+ entry->next = curr;
+ entry->child = NULL;
+ }
+ if (entry->uid >= 1 << CRAMFS_UID_WIDTH)
+ warn_uid = 1;
+ 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;
+ }
+ free(path);
+}
+
+/* the GNU C library has a wonderful scanf("%as", string) which will
+ allocate the string with the right size, good to avoid buffer overruns.
+ the following macros use it if available or use a hacky workaround...
+ */
+
+#ifdef __GNUC__
+#define SCANF_PREFIX "a"
+#define SCANF_STRING(s) (&s)
+#define GETCWD_SIZE 0
+#else
+#define SCANF_PREFIX "511"
+#define SCANF_STRING(s) (s = xmalloc(512))
+#define GETCWD_SIZE -1
+inline int snprintf(char *str, size_t n, const char *fmt, ...)
+{
+ int ret;
+ va_list ap;
+
+ va_start(ap, fmt);
+ ret = vsprintf(str, fmt, ap);
+ va_end(ap);
+ return ret;
+}
+#endif
+
+/* device table entries take the form of:
+ <path> <type> <mode> <uid> <gid> <major> <minor> <start> <inc> <count>
+ /dev/mem c 640 0 0 1 1 0 0 -
+
+ type can be one of:
+ f A regular file
+ d Directory
+ c Character special device file
+ b Block special device file
+ p Fifo (named pipe)
+
+ I don't bother with symlinks (permissions are irrelevant), hard
+ links (special cases of regular files), or sockets (why bother).
+
+ Regular files must exist in the target root directory. If a char,
+ block, fifo, or directory does not exist, it will be created.
+*/
+
+static int interpret_table_entry(char *line, struct entry *root, loff_t *fslen_ub)
+{
+ char type, *name = NULL;
+ unsigned long mode = 0755, uid = 0, gid = 0, major = 0, minor = 0;
+ unsigned long start = 0, increment = 1, count = 0;
+
+ if (sscanf (line, "%" SCANF_PREFIX "s %c %lo %lu %lu %lu %lu %lu %lu %lu",
+ SCANF_STRING(name), &type, &mode, &uid, &gid, &major, &minor,
+ &start, &increment, &count) < 0)
+ {
+ return 1;
+ }
+
+ if (!strcmp(name, "/")) {
+ error_msg_and_die("Device table entries require absolute paths");
+ }
+
+ switch (type) {
+ case 'd':
+ mode |= S_IFDIR;
+ modify_entry(name, uid, gid, mode, 0, root, fslen_ub);
+ break;
+ case 'f':
+ mode |= S_IFREG;
+ modify_entry(name, uid, gid, mode, 0, root, fslen_ub);
+ break;
+ case 'p':
+ mode |= S_IFIFO;
+ modify_entry(name, uid, gid, mode, 0, root, fslen_ub);
+ break;
+ case 'c':
+ case 'b':
+ mode |= (type == 'c') ? S_IFCHR : S_IFBLK;
+ if (count > 0) {
+ char *buf;
+ unsigned long i;
+ dev_t rdev;
+
+ for (i = start; i < count; i++) {
+ asprintf(&buf, "%s%lu", name, i);
+ rdev = makedev(major, minor + (i * increment - start));
+ modify_entry(buf, uid, gid, mode, rdev, root, fslen_ub);
+ free(buf);
+ }
+ } else {
+ dev_t rdev = makedev(major, minor);
+ modify_entry(name, uid, gid, mode, rdev, root, fslen_ub);
+ }
+ break;
+ default:
+ error_msg_and_die("Unsupported file type");
+ }
+ free(name);
+ return 0;
+}
+
+static int parse_device_table(FILE *file, struct entry *root, loff_t *fslen_ub)
+{
+ char *line;
+ int status = 0;
+ size_t length = 0;
+
+ /* Turn off squash, since we must ensure that values
+ * entered via the device table are not squashed */
+ opt_squash = 0;
+
+ /* Looks ok so far. The general plan now is to read in one
+ * line at a time, check for leading comment delimiters ('#'),
+ * then try and parse the line as a device table. If we fail
+ * to parse things, try and help the poor fool to fix their
+ * device table with a useful error msg... */
+ line = NULL;
+ while (getline(&line, &length, file) != -1) {
+ /* First trim off any whitespace */
+ int len = strlen(line);
+
+ /* trim trailing whitespace */
+ while (len > 0 && isspace(line[len - 1]))
+ line[--len] = '\0';
+ /* trim leading whitespace */
+ memmove(line, &line[strspn(line, " \n\r\t\v")], len);
+
+ /* How long are we after trimming? */
+ len = strlen(line);
+
+ /* If this is NOT a comment line, try to interpret it */
+ if (len && *line != '#') {
+ if (interpret_table_entry(line, root, fslen_ub))
+ status = 1;
+ }
+
+ free(line);
+ line = NULL;
+ }
+ free(line);
+ fclose(file);
+
+ return status;
+}
+
+void traverse(struct entry *entry, int depth)
+{
+ struct entry *curr = entry;
+ int i;
+
+ while (curr) {
+ for (i = 0; i < depth; i++) putchar(' ');
+ printf("%s: size=%d mode=%d same=%p\n",
+ (curr->name)? (char*)curr->name : "/",
+ curr->size, curr->mode, curr->same);
+ if (curr->child) traverse(curr->child, depth + 4);
+ curr = curr->next;
+ }
+}
+
+static void free_filesystem_entry(struct entry *dir)
+{
+ struct entry *e = dir, *last;
+
+ if (S_ISDIR(dir->mode)) {
+ e = dir->child;
+ }
+ while (e) {
+ if (e->name)
+ free(e->name);
+ if (e->path)
+ free(e->path);
+ if (e->uncompressed)
+ free(e->uncompressed);
+ last = e;
+ if (e->child) {
+ free_filesystem_entry(e);
+ }
+ e = e->next;
+ free(last);
+ }
+}
+
+
+/*
+ * 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... */
@@ -692,6 +1138,7 @@
u32 crc;
int c; /* for getopt */
char *ep; /* for strtoul */
+ FILE *devtable = NULL;
total_blocks = 0;
@@ -699,7 +1146,7 @@
progname = argv[0];
/* command line options */
- while ((c = getopt(argc, argv, "hEe:i:n:psvz")) != EOF) {
+ while ((c = getopt(argc, argv, "hEe:i:n:psvzD:q")) != EOF) {
switch (c) {
case 'h':
usage(MKFS_OK);
@@ -715,7 +1162,7 @@
case 'i':
opt_image = optarg;
if (lstat(opt_image, &st) < 0) {
- die(MKFS_ERROR, 1, "lstat failed: %s", opt_image);
+ error_msg_and_die("lstat failed: %s", opt_image);
}
image_length = st.st_size; /* may be padded later */
fslen_ub += (image_length + 3); /* 3 is for padding */
@@ -736,6 +1183,16 @@
case 'z':
opt_holes = 1;
break;
+ case 'q':
+ opt_squash = 1;
+ break;
+ case 'D':
+ devtable = xfopen(optarg, "r");
+ if (fstat(fileno(devtable), &st) < 0)
+ perror_msg_and_die(optarg);
+ if (st.st_size < 10)
+ error_msg_and_die("%s: not a proper device table file\n", optarg);
+ break;
}
}
@@ -745,25 +1202,23 @@
outfile = argv[optind + 1];
if (stat(dirname, &st) < 0) {
- die(MKFS_USAGE, 1, "stat failed: %s", dirname);
- }
- fd = open(outfile, O_WRONLY | O_CREAT | O_TRUNC, 0666);
- if (fd < 0) {
- die(MKFS_USAGE, 1, "open failed: %s", outfile);
+ error_msg_and_die("stat failed: %s", dirname);
}
+ fd = xopen(outfile, O_WRONLY | O_CREAT | O_TRUNC, 0666);
- root_entry = calloc(1, sizeof(struct entry));
- if (!root_entry) {
- die(MKFS_ERROR, 1, "calloc failed");
- }
+ root_entry = xcalloc(1, sizeof(struct entry));
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);
+ if (devtable) {
+ parse_device_table(devtable, root_entry, &fslen_ub);
+ }
+
/* always allocate a multiple of blksize bytes because that's
- what we're going to write later on */
+ what we're going to write later on */
fslen_ub = ((fslen_ub - 1) | (blksize - 1)) + 1;
if (fslen_ub > MAXFSLEN) {
@@ -790,7 +1245,7 @@
rom_image = mmap(NULL, fslen_ub?fslen_ub:1, PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
if (rom_image == MAP_FAILED) {
- die(MKFS_ERROR, 1, "mmap failed");
+ error_msg_and_die("mmap failed");
}
/* Skip the first opt_pad bytes for boot loader code */
@@ -807,6 +1262,7 @@
}
offset = write_directory_structure(root_entry->child, rom_image, offset);
+ if (opt_verbose)
printf("Directory data: %d bytes\n", offset);
offset = write_data(root_entry, rom_image, offset);
@@ -814,30 +1270,38 @@
/* We always write a multiple of blksize bytes, so that
losetup works. */
offset = ((offset - 1) | (blksize - 1)) + 1;
+ if (opt_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 (opt_verbose)
printf("Super block: %d bytes\n", sizeof(struct cramfs_super));
/* Put the checksum in. */
crc = crc32(0L, Z_NULL, 0);
crc = crc32(crc, (rom_image+opt_pad), (offset-opt_pad));
((struct cramfs_super *) (rom_image+opt_pad))->fsid.crc = crc;
+ if (opt_verbose)
printf("CRC: %x\n", crc);
/* Check to make sure we allocated enough space. */
if (fslen_ub < offset) {
- die(MKFS_ERROR, 0, "not enough space allocated for ROM image (%Ld allocated, %d used)", fslen_ub, offset);
+ error_msg_and_die("not enough space allocated for ROM "
+ "image (%Ld allocated, %d used)", fslen_ub, offset);
}
written = write(fd, rom_image, offset);
if (written < 0) {
- die(MKFS_ERROR, 1, "write failed");
+ error_msg_and_die("write failed");
}
if (offset != written) {
- die(MKFS_ERROR, 0, "ROM image write failed (wrote %d of %d bytes)", written, offset);
+ error_msg_and_die("ROM image write failed (wrote %d of %d bytes)", written, offset);
}
+
+ /* Free up memory */
+ free_filesystem_entry(root_entry);
+ free(root_entry);
/* (These warnings used to come at the start, but they scroll off the
screen too quickly.) */
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