diff options
author | Bill Richardson <wfrichar@chromium.org> | 2011-02-10 19:13:10 -0800 |
---|---|---|
committer | Bill Richardson <wfrichar@chromium.org> | 2011-02-10 19:13:10 -0800 |
commit | 794d4d44db984759466b5b6779833e2d5281e527 (patch) | |
tree | a2a9b8a4fc19276178dcac8889bbeb386a2b2aad /utility/bmpblk_util.c | |
parent | 31b206f218189d2ecb4b12cf05139bb423877a94 (diff) | |
download | vboot-794d4d44db984759466b5b6779833e2d5281e527.tar.gz |
New commandline args are clearer, and prepare for compression.
BUG=chromium-os:11488
TEST=none
Change-Id: I6ee493037da5746d2db6e840ac6590dd12f37cfe
Review URL: http://codereview.chromium.org/6482001
Diffstat (limited to 'utility/bmpblk_util.c')
-rw-r--r-- | utility/bmpblk_util.c | 101 |
1 files changed, 101 insertions, 0 deletions
diff --git a/utility/bmpblk_util.c b/utility/bmpblk_util.c new file mode 100644 index 00000000..d7b9cbf8 --- /dev/null +++ b/utility/bmpblk_util.c @@ -0,0 +1,101 @@ +// Copyright (c) 2010 The Chromium OS Authors. All rights reserved. +// Use of this source code is governed by a BSD-style license that can be +// found in the LICENSE file. + +#include <errno.h> +#include <fcntl.h> +#include <stdio.h> +#include <string.h> +#include <sys/mman.h> +#include <sys/stat.h> +#include <sys/types.h> +#include <unistd.h> + +#include "bmpblk_util.h" + + +// Returns pointer to buffer containing entire file, sets length. +static void *read_entire_file(const char *filename, size_t *length) { + int fd; + struct stat sbuf; + void *ptr; + + *length = 0; // just in case + + if (0 != stat(filename, &sbuf)) { + fprintf(stderr, "Unable to stat %s: %s\n", filename, strerror(errno)); + return 0; + } + + if (!sbuf.st_size) { + fprintf(stderr, "File %s is empty\n", filename); + return 0; + } + + fd = open(filename, O_RDONLY); + if (fd < 0) { + fprintf(stderr, "Unable to open %s: %s\n", filename, strerror(errno)); + return 0; + } + + ptr = mmap(0, sbuf.st_size, PROT_READ, MAP_PRIVATE, fd, 0); + if (MAP_FAILED == ptr) { + fprintf(stderr, "Unable to mmap %s: %s\n", filename, strerror(errno)); + close(fd); + return 0; + } + + *length = sbuf.st_size; + + close(fd); + + return ptr; +} + + +// Reclaims buffer from read_entire_file(). +static void discard_file(void *ptr, size_t length) { + munmap(ptr, length); +} + + +// Show what's inside +int display_bmpblock(const char *infile) { + char *ptr; + size_t length = 0; + BmpBlockHeader *hdr; + + ptr = (char *)read_entire_file(infile, &length); + if (!ptr) + return 1; + + if (length < sizeof(BmpBlockHeader)) { + fprintf(stderr, "File %s is too small to be a BMPBLOCK\n", infile); + discard_file(ptr, length); + return 1; + } + + if (0 != memcmp(ptr, BMPBLOCK_SIGNATURE, BMPBLOCK_SIGNATURE_SIZE)) { + fprintf(stderr, "File %s is not a BMPBLOCK\n", infile); + discard_file(ptr, length); + return 1; + } + + hdr = (BmpBlockHeader *)ptr; + printf("%s:\n", infile); + printf(" version %d.%d\n", hdr->major_version, hdr->minor_version); + printf(" %d screens\n", hdr->number_of_screenlayouts); + printf(" %d localizations\n", hdr->number_of_localizations); + printf(" %d discrete images\n", hdr->number_of_imageinfos); + + discard_file(ptr, length); + + return 0; +} + +int extract_bmpblock(const char *infile, const char *dirname, int force) { + printf("extract parts from %s into %s %s overwriting\n", + infile, dirname, force ? "with" : "without"); + printf("NOT YET IMPLEMENTED\n"); + return 0; +} |