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dumpifs.c
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dumpifs.c
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/*
* $QNXLicenseC:
* Copyright 2007, QNX Software Systems. All Rights Reserved.
*
* You must obtain a written license from and pay applicable license fees to QNX
* Software Systems before you may reproduce, modify or distribute this software,
* or any work that includes all or part of this software. Free development
* licenses are available for evaluation and non-commercial purposes. For more
* information visit http://licensing.qnx.com or email [email protected].
*
* This file may contain contributions from others. Please review this entire
* file for other proprietary rights or license notices, as well as the QNX
* Development Suite License Guide at http://licensing.qnx.com/license-guide/
* for other information.
* $
*/
#define _DISABLE_MD5_
#define min(a,b) ((a)<=(b)?(a):(b))
#ifdef __USAGE
%C - dump an image file system
%C [-mvxbz -u file] [-f file] image_file_system_file [files]
-b Extract to basenames of files
-u file Put a copy of the uncompressed image file here
-v Verbose
-x Extract files
-m Display MD5 Checksum
-f file Extract named file
-z Disable the zero check while searching for the startup header.
This option should be avoided as it makes the search for the
startup header less reliable.
Note: this may not be supported in the future.
#endif
#ifdef QNX
#include <lib/compat.h>
#else
#include "sys/compat.h"
#endif
#ifdef _NTO_HDR_DIR_
#define _PLATFORM(x) x
#define PLATFORM(x) <_PLATFORM(x)sys/platform.h>
#include PLATFORM(_NTO_HDR_DIR_)
#endif
#include <stdio.h>
#include <stdlib.h>
#include <stddef.h>
#include <stdarg.h>
#include <unistd.h>
#include <fcntl.h>
#include <errno.h>
#include <string.h>
#include <utime.h>
#include <sys/stat.h>
#ifdef QNX
#include <sys/elf.h>
#include <sys/image.h>
#include <sys/startup.h>
#else
#include "sys/elf.h"
#include "sys/startup.h"
#include "sys/image.h"
#endif
#include <libgen.h>
#include <zlib.h>
#ifdef QNX
#include <lzo1x.h>
#else
#include <lzo/lzo1x.h>
#endif
#include <ucl/ucl.h>
//#include "xplatform.h"
//#include "md5.h"
#if defined(__MINGW32__)
#define mkdir(path, mode) mkdir(path)
#endif
char *progname;
int verbose;
unsigned flags;
char **check_files;
char *ucompress_file;
int zero_check_enabled = 1;
int files_to_extract;
int files_left_to_extract;
int processing_done;
struct extract_file {
struct extract_file *next;
char *path;
} *extract_files = NULL;
#define FLAG_EXTRACT 0x00000001
#define FLAG_DISPLAY 0x00000002
#define FLAG_BASENAME 0x00000004
#define FLAG_MD5 0x00000008
#if 1
#define ENDIAN_RET32(x) ((((x) >> 24) & 0xff) | \
(((x) >> 8) & 0xff00) | \
(((x) & 0xff00) << 8) | \
(((x) & 0xff) << 24))
#define ENDIAN_RET16(x) ((((x) >> 8) & 0xff) | \
(((x) & 0xff) << 8))
#else
#define ENDIAN_RET32(x) (x)
#define ENDIAN_RET16(x) (x)
#endif
#define CROSSENDIAN(big) (big)
void process(const char *file, FILE *fp);
void display_shdr(FILE *fp, int spos, struct startup_header *hdr);
void display_ihdr(FILE *fp, int ipos, struct image_header *hdr);
void process_file(FILE *fp, int ipos, struct image_file *ent);
void process_dir(FILE *fp, int ipos, struct image_dir *ent);
void process_symlink(FILE *fp, int ipos, struct image_symlink *ent);
void process_device(FILE *fp, int ipos, struct image_device *ent);
void display_file(FILE *fp, int ipos, struct image_file *ent);
#define MD5_LENGTH 16
void compute_md5(FILE *fp, int ipos, struct image_file *ent, unsigned char md5_result[16]);
int zero_ok (struct startup_header *shdr);
static int rifs_checksum(void *ptr, long len);
#if defined(__QNXNTO__) || defined(__SOLARIS__)
// Get basename()
#include <libgen.h>
#endif
void error(int level, char *p, ...) {
va_list ap;
fprintf(stderr, "%s: ", progname);
va_start(ap, p);
vfprintf(stderr, p, ap);
va_end(ap);
fputc('\n', stderr);
if(level == 0) {
exit(EXIT_FAILURE);
}
}
int main(int argc, char *argv[]) {
int c;
char *image;
FILE *fp = NULL;
char *dest_dir_path = NULL;
int tfd = -1;
char tpath[_POSIX_PATH_MAX];
struct extract_file *ef;
progname = basename(argv[0]);
while((c = getopt(argc, argv, "f:d:mvxbu:z")) != -1) {
switch(c) {
case 'f':
ef = malloc( sizeof(*ef) );
if ( ef == NULL ) {
perror("recording path");
break;
}
ef->path = strdup(optarg);
if ( ef->path == NULL ) {
perror("recording path");
break;
}
ef->next = extract_files;
extract_files = ef;
files_to_extract++;
files_left_to_extract++;
flags |= FLAG_EXTRACT;
break;
case 'd':
dest_dir_path = strdup(optarg);
flags |= FLAG_EXTRACT;
break;
case 'm':
flags |= FLAG_MD5;
break;
case 'x':
flags |= FLAG_EXTRACT;
break;
case 'b':
flags |= FLAG_BASENAME;
break;
case 'u':
ucompress_file = optarg;
break;
case 'v':
verbose++;
break;
case 'z':
zero_check_enabled = 0;
break;
default:
break;
}
}
if(flags & (FLAG_EXTRACT|FLAG_MD5)) {
if(verbose > 1) {
flags |= FLAG_DISPLAY;
}
} else {
flags |= FLAG_DISPLAY;
}
if(optind >= argc) {
error(0, "Missing image file system name\n");
}
image = argv[optind++];
if(optind < argc) {
check_files = &argv[optind];
}
if(strcmp(image, "-") != 0) {
if(!(fp = fopen(image, "rb"))) {
error(0, "Unable to open file %s - %s", image, strerror(errno));
}
} else if(isatty(fileno(stdin))) {
error(0, "Must have an image file");
} else {
fp = stdin;
image = "-- stdin --";
}
if ( dest_dir_path != NULL ) {
/* This temp file is created to address the problems of creating a file in /dev/shmem */
sprintf( tpath, "%s/.dumpifs.%d", dest_dir_path, getpid() );
tfd = open( tpath, O_CREAT|O_RDONLY, 0644 );
if ( tfd == -1 ) {
if ( (access( dest_dir_path, W_OK ) != 0 ) && (mkdir( dest_dir_path, 0755) != 0)) {
error(0, "Cannot create directory %s to extract %s", dest_dir_path, image);
}
}
if (chdir(dest_dir_path) != 0) {
error(0, "Cannot cd to directory %s to extract %s", dest_dir_path, image);
}
}
process(image, fp);
if ( tfd != -1 ) {
close(tfd);
unlink( tpath );
}
return EXIT_SUCCESS;
}
int find(FILE *fp, const unsigned char *p, int len, int count) {
int c;
int i;
int n;
i = n = 0;
while(i < len && (c = fgetc(fp)) != EOF) {
n++;
if(c == p[i]) {
i++;
} else {
if(count != -1 && n >= count) {
break;
}
i = c == p[0] ? 1 : 0;
}
}
if(i < len) {
return -1;
}
return ftell(fp) - i;
}
int check(const char *name) {
char **p;
if(!(p = check_files)) {
return 0;
}
name = basename((char *)name);
while(*p) {
if(strcmp(name, *p) == 0) {
return 0;
}
p++;
}
return -1;
}
char *associate(int ix, char *value)
{
static int num = 0;
static char **text = NULL;
char **ptr;
if (value != NULL) {
if (ix >= num) {
if ((ptr = realloc(text, (ix + 1) * sizeof(char *))) == NULL)
return(value);
memset(&ptr[num], 0, (ix - num) * sizeof(char *));
text = ptr, num = ix + 1;
}
text[ix] = strdup(value);
}
else {
value = (ix < num) ? text[ix] : "";
}
return(value);
}
void display_script(FILE *fp, int pos, int len) {
int off;
char buff[512];
union script_cmd *hdr = (union script_cmd *)buff;
int size;
int ext_sched = SCRIPT_SCHED_EXT_NONE;
for(off = 0; off < len; off += size) {
fseek(fp, pos + off, SEEK_SET);
if(fread(hdr, sizeof *hdr, 1, fp) != 1) {
break;
}
if((size = hdr->hdr.size_lo | (hdr->hdr.size_hi << 8)) == 0) {
break;
}
if(size > sizeof *hdr) {
int n = min(sizeof buff, size - sizeof *hdr);
if(fread(hdr + 1, n, 1, fp) != 1) {
break;
}
}
printf(" ");
switch(hdr->hdr.type) {
case SCRIPT_TYPE_EXTERNAL: {
char *cmd, *args, *envs;
int i;
cmd = hdr->external.args;
envs = args = cmd + strlen(cmd) + 1;
for(i = 0; i < hdr->external.argc; i++) {
envs = envs + strlen(envs) + 1;
}
i = strcmp(basename(cmd), args);
if(i || (hdr->external.flags & (SCRIPT_FLAGS_SESSION | SCRIPT_FLAGS_KDEBUG | SCRIPT_FLAGS_SCHED_SET | SCRIPT_FLAGS_CPU_SET | SCRIPT_FLAGS_EXTSCHED))) {
printf("[ ");
if(i) {
printf("argv0=%s ", args);
}
if(hdr->external.flags & SCRIPT_FLAGS_SESSION) {
printf("+session ");
}
if(hdr->external.flags & SCRIPT_FLAGS_KDEBUG) {
printf("+debug ");
}
if(hdr->external.flags & SCRIPT_FLAGS_SCHED_SET) {
printf("priority=%d", hdr->external.priority);
switch(hdr->external.policy) {
case SCRIPT_POLICY_NOCHANGE:
break;
case SCRIPT_POLICY_FIFO:
printf("f");
break;
case SCRIPT_POLICY_RR:
printf("r");
break;
case SCRIPT_POLICY_OTHER:
printf("o");
break;
default:
printf("?%d?", hdr->external.policy);
break;
}
printf(" ");
}
if(hdr->external.flags & SCRIPT_FLAGS_CPU_SET) {
printf("cpu=%d ", hdr->external.cpu);
}
if(hdr->external.flags & SCRIPT_FLAGS_EXTSCHED) {
printf("sched_aps=%s ", associate(hdr->external.extsched.aps.id, NULL));
}
printf("] ");
}
for(i = 0; i < hdr->external.envc; i++) {
printf("%s ", envs);
envs = envs + strlen(envs) + 1;
}
printf("%s", cmd);
args = args + strlen(args) + 1;
for(i = 1; i < hdr->external.argc; i++) {
printf(" %s", args);
args = args + strlen(args) + 1;
}
if(hdr->external.flags & SCRIPT_FLAGS_BACKGROUND) {
printf(" &");
}
printf("\n");
break;
}
case SCRIPT_TYPE_WAITFOR:
printf("waitfor");
goto wait;
case SCRIPT_TYPE_REOPEN:
printf("reopen");
wait:
if(hdr->waitfor_reopen.checks_lo || hdr->waitfor_reopen.checks_hi) {
int checks = hdr->waitfor_reopen.checks_lo | hdr->waitfor_reopen.checks_hi << 8;
printf(" %d.%d", checks / 10, checks % 10);
}
printf(" %s\n", hdr->waitfor_reopen.fname);
break;
case SCRIPT_TYPE_DISPLAY_MSG:
printf("display_msg '%s'\n", hdr->display_msg.msg);
break;
case SCRIPT_TYPE_PROCMGR_SYMLINK:
printf("procmgr_symlink '%s' '%s'\n", hdr->procmgr_symlink.src_dest,
&hdr->procmgr_symlink.src_dest[strlen(hdr->procmgr_symlink.src_dest)+1]);
break;
case SCRIPT_TYPE_EXTSCHED_APS:
if (ext_sched == SCRIPT_SCHED_EXT_NONE)
associate(SCRIPT_APS_SYSTEM_PARTITION_ID, SCRIPT_APS_SYSTEM_PARTITION_NAME);
else if (ext_sched != SCRIPT_SCHED_EXT_APS)
printf("Invalid combination of SCHED_EXT features\n");
ext_sched = SCRIPT_SCHED_EXT_APS;
printf("sched_aps %s %d %d\n", associate(hdr->extsched_aps.id, hdr->extsched_aps.pname), hdr->extsched_aps.budget, hdr->extsched_aps.critical_hi << 8 | hdr->extsched_aps.critical_lo);
break;
default:
printf("Unknown type %d\n", hdr->hdr.type);
}
}
}
static char* hStart=0;
void process(const char *file, FILE *fp) {
struct startup_header shdr = { STARTUP_HDR_SIGNATURE };
int spos;
struct image_header ihdr = { IMAGE_SIGNATURE };
int ipos;
int dpos;
static char buf[0x10000];
static char out_buf[0x10000];
spos = -1;
hStart = (char*)&shdr.signature;
if((ipos = find(fp, (char*)&ihdr.signature, sizeof ihdr.signature, 0)) == -1) {
rewind(fp);
//find startup signature and verify its validity
while(1){
if((spos = find(fp, (char *)&shdr.signature, sizeof shdr.signature, -1)) == -1) {
shdr.signature = ENDIAN_RET32(shdr.signature);
rewind(fp);
if((spos = find(fp, (char *)&shdr.signature, sizeof shdr.signature, -1)) == -1) {
error(1, "Unable to find startup header in %s", file);
return;
}
}
if(fread((char *)&shdr + sizeof shdr.signature, sizeof shdr - sizeof shdr.signature, 1, fp) != 1) {
error(1, "Unable to read image %s", file);
return;
}
// if we are cross endian, flip the shdr members
{
// flip shdr members
}
//check the zero member of startup, one more check to confirm
//we found the correct signature
if (!zero_ok(&shdr)) {
if (zero_check_enabled)
continue;
if (verbose)
printf("Warning: Non zero data in zero fields ignored\n");
break;
} else {
break;
}
}
printf("Image startup_size: %d (0x%x)\n", shdr.startup_size, shdr.startup_size);
printf("Image stored_size: %d (0x%x)\n", shdr.stored_size, shdr.stored_size);
printf("Compressed size: %d (0x%x)\n", shdr.stored_size - shdr.startup_size - sizeof(struct image_trailer), shdr.stored_size - shdr.startup_size - sizeof(struct image_trailer));
// If the image is compressed we need to uncompress it into a
// tempfile and restart.
if((shdr.flags1 & STARTUP_HDR_FLAGS1_COMPRESS_MASK) != 0) {
FILE *fp2;
int n;
// Create a file to hold uncompressed image.
if(ucompress_file) {
fp2 = fopen(ucompress_file, "w+");
} else {
fp2 = tmpfile();
}
if(fp2 == NULL) {
error(1, "Unable to create a file to uncompress image.");
return;
}
// Copy non-compressed part.
rewind(fp);
if(CROSSENDIAN(shdr.flags1 & STARTUP_HDR_FLAGS1_BIGENDIAN))
for(n = 0 ; n < spos + ENDIAN_RET32(shdr.startup_size); ++n) {
putc(getc(fp), fp2);
}
else
for(n = 0 ; n < spos + shdr.startup_size; ++n) {
putc(getc(fp), fp2);
}
fflush(fp2);
// Uncompress compressed part
switch(shdr.flags1 & STARTUP_HDR_FLAGS1_COMPRESS_MASK) {
case STARTUP_HDR_FLAGS1_COMPRESS_ZLIB:
{
int fd;
gzFile *zin;
// We need an fd for zlib, and we cannot count on the fd
// position being the same as the FILE *'s, so fileno()
// and lseek.
fd = fileno(fp);
lseek(fd, ftell(fp), SEEK_SET);
if((zin = gzdopen(fd, "rb")) == NULL) {
error(1, "Unable to open decompression stream.");
return;
}
while((n = gzread(zin, buf, sizeof(buf))) > 0) {
printf("zlib Decompress\n");
fwrite(buf, n, 1, fp2);
}
}
break;
case STARTUP_HDR_FLAGS1_COMPRESS_LZO:
{
unsigned len, til=0, tol=0;
lzo_uint out_len;
int status;
if(lzo_init() != LZO_E_OK) {
error(1,"decompression init failure");
return;
}
printf("LZO Decompress @0x%0lx\n", ftell(fp));
for(;;) {
unsigned int nowPtr=ftell(fp);
int c1= getc(fp);
int c2= getc(fp);
len = (c1 << 8);
len += c2;
//len = getc(fp) << 8;
//len += getc(fp);
if(len == 0) break;
fread(buf, len, 1, fp);
printf("lzo1x_decompress(buf, %d...)\n");
status = lzo1x_decompress(buf, len, out_buf, &out_len, NULL);
if(status != LZO_E_OK) {
error(1, "decompression failure");
printf("decompression not success with code %d. out_len=%d. c1=%x, c2=%x @0x%x\n", status, out_len, c1, c2, nowPtr);
return;
}
til+=len;tol+=out_len;
printf("LZO Decompress rd=%d, wr=%d @ 0x%x\n", len, out_len, nowPtr);
fwrite(out_buf, out_len, 1, fp2);
}
printf("Decompressed %d bytes-> %d bytes\n", til, tol);
}
break;
case STARTUP_HDR_FLAGS1_COMPRESS_UCL:
{
unsigned len, til=0, tol=0;
ucl_uint out_len;
int status;
printf("UCL Decompress @0x%0lx\n", ftell(fp));
for(;;) {
unsigned int nowPtr = ftell(fp);
len = getc(fp) << 8;
len += getc(fp);
if(len == 0) break;
fread(buf, len, 1, fp);
status = ucl_nrv2b_decompress_8(buf, len, out_buf, &out_len, NULL);
if(status != 0) {
error(1, "decompression failure");
return;
}
til+=len;tol+=out_len;
printf("UCL Decompress rd=%d (0x%x), wr=%d @ 0x%x\n", len, len, out_len, nowPtr);
fwrite(out_buf, out_len, 1, fp2);
}
printf("Decompressed %d bytes-> %d bytes\n", til, tol);
}
break;
default:
error(1, "Unsupported compression type.");
return;
}
fclose(fp);
fp = fp2;
rewind(fp2);
}
if(CROSSENDIAN(shdr.flags1 & STARTUP_HDR_FLAGS1_BIGENDIAN)) {
unsigned long *p;
shdr.version = ENDIAN_RET16(shdr.version);
shdr.machine = ENDIAN_RET16(shdr.machine);
shdr.header_size = ENDIAN_RET16(shdr.header_size);
shdr.preboot_size = ENDIAN_RET16(shdr.preboot_size);
for(p = (unsigned long *)&shdr.startup_vaddr; (unsigned char *)p < (unsigned char *)&shdr + sizeof shdr; p++) {
if(p != (unsigned long *)&shdr.preboot_size) {
*p = ENDIAN_RET32(*p);
}
}
}
fseek(fp, spos + shdr.startup_size, SEEK_SET);
if((ipos = find(fp, ihdr.signature, sizeof ihdr.signature, -1)) == -1) {
error(1, "Unable to find image header in %s", file);
return;
}
}
if(fread((char *)&ihdr + sizeof ihdr.signature, sizeof ihdr - sizeof ihdr.signature, 1, fp) != 1) {
error(1, "Unable to read image %s", file);
return;
}
if(CROSSENDIAN(ihdr.flags & IMAGE_FLAGS_BIGENDIAN)) {
unsigned long *p;
for(p = (unsigned long *)&ihdr.image_size; (unsigned char *)p < (unsigned char *)&ihdr + offsetof(struct image_header, mountpoint); p++) {
*p = ENDIAN_RET32(*p);
}
}
dpos = ipos + ihdr.dir_offset;
if(flags & FLAG_DISPLAY) {
printf(" Offset Size Name\n");
if(spos != -1) {
if(spos) {
if(check("*.boot") == 0) {
printf(" %8x %8x %s\n", 0, spos, "*.boot");
}
}
display_shdr(fp, spos, &shdr);
if(check("startup.*") == 0) {
printf(" %8x %8lx %s\n", spos + sizeof shdr, shdr.startup_size - sizeof shdr, "startup.*");
}
}
display_ihdr(fp, ipos, &ihdr);
if(check("Image-directory") == 0) {
printf(" %8x %8lx %s\n", dpos, ihdr.hdr_dir_size - ihdr.dir_offset, "Image-directory");
}
}
while(!processing_done) {
char buff[1024];
union image_dirent *dir = (union image_dirent *)buff;
fseek(fp, dpos, SEEK_SET);
if(fread(&dir->attr, sizeof dir->attr, 1, fp) != 1) {
error(1, "Early end reading directory");
break;
}
if(CROSSENDIAN(ihdr.flags & IMAGE_FLAGS_BIGENDIAN)) {
unsigned long *p;
dir->attr.size = ENDIAN_RET16(dir->attr.size);
dir->attr.extattr_offset = ENDIAN_RET16(dir->attr.extattr_offset);
for(p = (unsigned long *)&dir->attr.ino; (unsigned char *)p < (unsigned char *)dir + sizeof dir->attr; p++) {
*p = ENDIAN_RET32(*p);
}
}
if(dir->attr.size < sizeof dir->attr) {
if(dir->attr.size != 0) {
error(1, "Invalid dir entry");
}
break;
}
if(dir->attr.size > sizeof dir->attr) {
if(fread((char *)dir + sizeof dir->attr, min(sizeof buff, dir->attr.size) - sizeof dir->attr, 1, fp) != 1) {
error(1, "Error reading directory");
break;
}
}
dpos += dir->attr.size;
switch(dir->attr.mode & S_IFMT) {
case S_IFREG:
if(CROSSENDIAN(ihdr.flags & IMAGE_FLAGS_BIGENDIAN)) {
dir->file.offset = ENDIAN_RET32(dir->file.offset);
dir->file.size = ENDIAN_RET32(dir->file.size);
}
process_file(fp, ipos, &dir->file);
if(dir->attr.ino == ihdr.script_ino && verbose > 1) {
display_script(fp, ipos + dir->file.offset, dir->file.size);
}
break;
case S_IFDIR:
process_dir(fp, ipos, &dir->dir);
break;
case S_IFLNK:
if(CROSSENDIAN(ihdr.flags & IMAGE_FLAGS_BIGENDIAN)) {
dir->symlink.sym_offset = ENDIAN_RET16(dir->symlink.sym_offset);
dir->symlink.sym_size = ENDIAN_RET16(dir->symlink.sym_size);
}
process_symlink(fp, ipos, &dir->symlink);
break;
case S_IFCHR:
case S_IFBLK:
case S_IFIFO:
case S_IFNAM:
if(CROSSENDIAN(ihdr.flags & IMAGE_FLAGS_BIGENDIAN)) {
dir->device.dev = ENDIAN_RET32(dir->device.dev);
dir->device.rdev = ENDIAN_RET32(dir->device.rdev);
}
process_device(fp, ipos, &dir->device);
// dir->device;
break;
default:
error(1, "Unknown type\n");
break;
}
}
if(flags & FLAG_DISPLAY) {
struct image_trailer itlr;
struct startup_trailer stlr;
fseek(fp, ipos + ihdr.image_size-sizeof(itlr), SEEK_SET);
if(fread(&itlr, sizeof(itlr), 1, fp) != 1) {
error(1, "Early end reading image trailer");
return;
}
if(CROSSENDIAN(shdr.flags1 & STARTUP_HDR_FLAGS1_BIGENDIAN))
printf("Checksums: image=%#lx", ENDIAN_RET32(itlr.cksum));
else
printf("Checksums: image=%#lx", itlr.cksum);
if(spos != -1) {
fseek(fp, spos + shdr.startup_size-sizeof(stlr), SEEK_SET);
if(fread(&stlr, sizeof(stlr), 1, fp) != 1) {
printf("\n");
error(1, "Early end reading startup trailer");
return;
}
if(CROSSENDIAN(shdr.flags1 & STARTUP_HDR_FLAGS1_BIGENDIAN))
printf(" startup=%#lx", ENDIAN_RET32(stlr.cksum));
else
printf(" startup=%#lx", stlr.cksum);
}
printf("\n");
//printf("ipos=%#lx spos=%#lx ihdr.image_size=%#ld - sizeof(stlr) = %#ld\n", ipos, spos, ihdr.image_size, ihdr.image_size-sizeof(itlr));
{
int data;
int sum;
int counted=0;
int len = ihdr.image_size;
unsigned max;
fseek(fp, ipos , SEEK_SET);
sum = 0;
while(len > 4)
{
fread(&data, 4, 1, fp);
sum += data;
counted +=4;
len -= 4;
}
sum = -1*sum;
if(0 != (itlr.cksum - sum))
{
printf("\nStored checksum not correct!\n");
printf("Expected checksum: %#lx\n", sum);
printf(" NG: %02x %02x %02x %02x\n", itlr.cksum & 0xff, (itlr.cksum >> 8) & 0xff, (itlr.cksum >> 16) & 0xff, (itlr.cksum >> 24) & 0xff);
printf("GOOD: %02x %02x %02x %02x\n", sum & 0xff, (sum >> 8) & 0xff, (sum >> 16) & 0xff, (sum >> 24) & 0xff);
}
}
printf("Image startup_size: %d (0x%x)\n", shdr.startup_size, shdr.startup_size);
printf("Image stored_size: %d (0x%x)\n", shdr.stored_size, shdr.stored_size);
printf("Compressed size: %d (0x%x)\n", shdr.stored_size - shdr.startup_size - sizeof(itlr), shdr.stored_size - shdr.startup_size - sizeof(itlr));
}
}
int copy(FILE *from, FILE *to, int nbytes) {
char buff[4096];
int n;
while(nbytes > 0) {
n = min(sizeof buff, nbytes);
if(fread(buff, n, 1, from) != 1) {
return -1;
}
if(fwrite(buff, n, 1, to) != 1) {
return -1;
}
nbytes -= n;
}
return 0;
}
void display_shdr(FILE *fp, int spos, struct startup_header *hdr) {
if(check("Startup-header") != 0) {
return;
}
printf(" %8x %8x %s flags1=%#x flags2=%#x paddr_bias=%#lx\n",
spos, hdr->header_size, "Startup-header",
hdr->flags1, hdr->flags2,
hdr->paddr_bias);
if(verbose) {
printf(" preboot_size=%#lx\n", (unsigned long)hdr->preboot_size);
printf(" image_paddr=%#lx stored_size=%#lx\n", (unsigned long)hdr->image_paddr, (unsigned long)hdr->stored_size);
printf(" startup_size=%#lx imagefs_size=%#lx\n", (unsigned long)hdr->startup_size, (unsigned long)hdr->imagefs_size);
printf(" ram_paddr=%#lx ram_size=%#lx\n", (unsigned long)hdr->ram_paddr, (unsigned long)hdr->ram_size);
printf(" startup_vaddr=%#lx\n", (unsigned long)hdr->startup_vaddr);
}
}
void display_ihdr(FILE *fp, int ipos, struct image_header *hdr) {
if(check("Image-header") != 0) {
return;
}
printf(" %8x %8x %s", ipos, sizeof *hdr, "Image-header");
if(hdr->mountpoint[0]) {
char buff[512];
fseek(fp, ipos + offsetof(struct image_header, mountpoint), SEEK_SET);
if(fread(buff, min(sizeof buff, hdr->dir_offset - offsetof(struct image_header, mountpoint)), 1, fp) != 1) {
error(1, "Unable to read image mountpoint");
} else {
printf(" mountpoint=%s", buff);
}
}
printf("\n");
if(verbose) {
int i;
printf(" flags=%#x", hdr->flags);
if(hdr->chain_paddr) {
printf(" chain=%#lx", hdr->chain_paddr);
}
if(hdr->script_ino) {
printf(" script=%ld", hdr->script_ino);
}
for(i = 0; i < sizeof hdr->boot_ino / sizeof hdr->boot_ino[0]; i++) {
if(hdr->boot_ino[i]) {
printf(" boot=%ld", hdr->boot_ino[i]);
for(i++; i < sizeof hdr->boot_ino / sizeof hdr->boot_ino[0]; i++) {
if(hdr->boot_ino[i]) {
printf(",%ld", hdr->boot_ino[i]);
}
}
break;
}
}
for(i = 0; i < sizeof hdr->spare / sizeof hdr->spare[0]; i++) {
if(hdr->spare[i]) {
printf(" spare=%#lx", hdr->spare[0]);
for(i = 1; i < sizeof hdr->spare / sizeof hdr->spare[0]; i++) {
printf(",%ld", hdr->spare[i]);
}
break;
}
}
printf(" mntflg=%#lx\n", hdr->mountflags);
}
}
void display_attr(struct image_attr *attr) {
printf(" gid=%ld uid=%ld mode=%#lo ino=%ld mtime=%lx\n", attr->gid, attr->uid, attr->mode & ~S_IFMT, attr->ino, attr->mtime);
}
void display_dir(FILE *fp, int ipos, struct image_dir *ent) {
if(check(ent->path[0] ? ent->path : "Root-dirent") != 0) {
return;
}
printf(" ---- ---- %s\n", ent->path[0] ? ent->path : "Root-dirent");
if(verbose) {
display_attr(&ent->attr);
}
}
void process_dir(FILE *fp, int ipos, struct image_dir *ent) {
if(flags & FLAG_DISPLAY) {
display_dir(fp, ipos, ent);
}
}
void display_symlink(FILE *fp, int ipos, struct image_symlink *ent) {
if(check(ent->path) != 0) {
return;
}
printf(" ---- %8x %s -> %s\n", ent->sym_size, ent->path, &ent->path[ent->sym_offset]);
if(verbose) {
display_attr(&ent->attr);
}
}
void process_symlink(FILE *fp, int ipos, struct image_symlink *ent) {
if(flags & FLAG_DISPLAY) {
display_symlink(fp, ipos, ent);
}
}
void display_device(FILE *fp, int ipos, struct image_device *ent) {
if(check(ent->path) != 0) {
return;
}
printf(" ---- ---- %s dev=%ld rdev=%ld\n", ent->path, ent->dev, ent->rdev);
if(verbose) {
display_attr(&ent->attr);
}
}
void process_device(FILE *fp, int ipos, struct image_device *ent) {
if(flags & FLAG_DISPLAY) {
display_device(fp, ipos, ent);
}
}
int mkdir_p(const char *path)
{
/* Adapted from http://stackoverflow.com/a/2336245/119527 */
const size_t len = strlen(path);
char _path[PATH_MAX];
char *p;
errno = 0;
/* Copy string so its mutable */
if (len > sizeof(_path)-1) {
errno = ENAMETOOLONG;
return -1;
}
strcpy(_path, path);
/* Iterate the string */
for (p = _path + 1; *p; p++) {
if (*p == '/') {
/* Temporarily truncate */
*p = '\0';
if (mkdir(_path, S_IRWXU) != 0) {
if (errno != EEXIST)
return -1;
}
*p = '/';
}
}
if (mkdir(_path, S_IRWXU) != 0) {
if (errno != EEXIST)
return -1;
}
return 0;
}
void extract_file(FILE *fp, int ipos, struct image_file *ent) {
char *name;
FILE *dst;
struct utimbuf buff;
struct extract_file *ef;