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@ -6,34 +6,110 @@ |
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* from a kernel image file and root fs file |
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* |
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* Author: Sandeep Mistry |
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* Author: Yousong Zhou |
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* - remove size limit on kernel and rootfs part |
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*/ |
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#include <arpa/inet.h> |
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#include <fcntl.h> |
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#include <stdio.h> |
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#include <stdint.h> |
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#include <stdbool.h> |
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#include <string.h> |
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#include <errno.h> |
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#include <sys/types.h> |
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#include <sys/stat.h> |
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#include <unistd.h> |
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#include "cyg_crc.h" |
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// Prelimiary test shows that the OEM upgrade program only checks checksum of
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// the whole firmware image, ignoring specific checksums of kernel and rootfs
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// part. But we are computing crc32 sums of fixed length of data here in lieu
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// of read_fw utility found in OEM SDK
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#define CRC_SZ_KERNEL 0x100000 |
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#define CRC_SZ_ROOTFS 0x2fffc4 |
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// OEM firmware has size limit on "linux" and "rootfs" partition. That's also
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// the limit for factory firmware images as fwupgrade utility in the OEM system
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// needs to write kernel and rootfs to those two partitions (/dev/mtd2 and
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// /dev/mtd3 to be exact)
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#define SZ_MAX_KERNEL (0x180000 - 0x40000) |
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#define SZ_MAX_ROOTFS (0x7b0000 - 0x18000) |
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// https://dev.openwrt.org/browser/trunk/target/linux/rdc-2.6/files/drivers/mtd/maps/rdc3210.c
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static uint32_t crctab[257] = |
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{ |
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0x00000000, 0x77073096, 0xee0e612c, 0x990951ba, |
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0x076dc419, 0x706af48f, 0xe963a535, 0x9e6495a3, |
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0x0edb8832, 0x79dcb8a4, 0xe0d5e91e, 0x97d2d988, |
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0x09b64c2b, 0x7eb17cbd, 0xe7b82d07, 0x90bf1d91, |
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0x1db71064, 0x6ab020f2, 0xf3b97148, 0x84be41de, |
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0x1adad47d, 0x6ddde4eb, 0xf4d4b551, 0x83d385c7, |
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0x136c9856, 0x646ba8c0, 0xfd62f97a, 0x8a65c9ec, |
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0x14015c4f, 0x63066cd9, 0xfa0f3d63, 0x8d080df5, |
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0x3b6e20c8, 0x4c69105e, 0xd56041e4, 0xa2677172, |
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0x3c03e4d1, 0x4b04d447, 0xd20d85fd, 0xa50ab56b, |
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0x35b5a8fa, 0x42b2986c, 0xdbbbc9d6, 0xacbcf940, |
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0x32d86ce3, 0x45df5c75, 0xdcd60dcf, 0xabd13d59, |
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0x26d930ac, 0x51de003a, 0xc8d75180, 0xbfd06116, |
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0x21b4f4b5, 0x56b3c423, 0xcfba9599, 0xb8bda50f, |
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0x2802b89e, 0x5f058808, 0xc60cd9b2, 0xb10be924, |
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0x2f6f7c87, 0x58684c11, 0xc1611dab, 0xb6662d3d, |
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0x76dc4190, 0x01db7106, 0x98d220bc, 0xefd5102a, |
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0x71b18589, 0x06b6b51f, 0x9fbfe4a5, 0xe8b8d433, |
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0x7807c9a2, 0x0f00f934, 0x9609a88e, 0xe10e9818, |
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0x7f6a0dbb, 0x086d3d2d, 0x91646c97, 0xe6635c01, |
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0x6b6b51f4, 0x1c6c6162, 0x856530d8, 0xf262004e, |
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0x6c0695ed, 0x1b01a57b, 0x8208f4c1, 0xf50fc457, |
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0x65b0d9c6, 0x12b7e950, 0x8bbeb8ea, 0xfcb9887c, |
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0x62dd1ddf, 0x15da2d49, 0x8cd37cf3, 0xfbd44c65, |
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0x4db26158, 0x3ab551ce, 0xa3bc0074, 0xd4bb30e2, |
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0x4adfa541, 0x3dd895d7, 0xa4d1c46d, 0xd3d6f4fb, |
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0x4369e96a, 0x346ed9fc, 0xad678846, 0xda60b8d0, |
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0x44042d73, 0x33031de5, 0xaa0a4c5f, 0xdd0d7cc9, |
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0x5005713c, 0x270241aa, 0xbe0b1010, 0xc90c2086, |
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0x5768b525, 0x206f85b3, 0xb966d409, 0xce61e49f, |
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0x5edef90e, 0x29d9c998, 0xb0d09822, 0xc7d7a8b4, |
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0x59b33d17, 0x2eb40d81, 0xb7bd5c3b, 0xc0ba6cad, |
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0xedb88320, 0x9abfb3b6, 0x03b6e20c, 0x74b1d29a, |
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0xead54739, 0x9dd277af, 0x04db2615, 0x73dc1683, |
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0xe3630b12, 0x94643b84, 0x0d6d6a3e, 0x7a6a5aa8, |
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0xe40ecf0b, 0x9309ff9d, 0x0a00ae27, 0x7d079eb1, |
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0xf00f9344, 0x8708a3d2, 0x1e01f268, 0x6906c2fe, |
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0xf762575d, 0x806567cb, 0x196c3671, 0x6e6b06e7, |
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0xfed41b76, 0x89d32be0, 0x10da7a5a, 0x67dd4acc, |
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0xf9b9df6f, 0x8ebeeff9, 0x17b7be43, 0x60b08ed5, |
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0xd6d6a3e8, 0xa1d1937e, 0x38d8c2c4, 0x4fdff252, |
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0xd1bb67f1, 0xa6bc5767, 0x3fb506dd, 0x48b2364b, |
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0xd80d2bda, 0xaf0a1b4c, 0x36034af6, 0x41047a60, |
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0xdf60efc3, 0xa867df55, 0x316e8eef, 0x4669be79, |
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0xcb61b38c, 0xbc66831a, 0x256fd2a0, 0x5268e236, |
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0xcc0c7795, 0xbb0b4703, 0x220216b9, 0x5505262f, |
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0xc5ba3bbe, 0xb2bd0b28, 0x2bb45a92, 0x5cb36a04, |
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0xc2d7ffa7, 0xb5d0cf31, 0x2cd99e8b, 0x5bdeae1d, |
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0x9b64c2b0, 0xec63f226, 0x756aa39c, 0x026d930a, |
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0x9c0906a9, 0xeb0e363f, 0x72076785, 0x05005713, |
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0x95bf4a82, 0xe2b87a14, 0x7bb12bae, 0x0cb61b38, |
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0x92d28e9b, 0xe5d5be0d, 0x7cdcefb7, 0x0bdbdf21, |
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0x86d3d2d4, 0xf1d4e242, 0x68ddb3f8, 0x1fda836e, |
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0x81be16cd, 0xf6b9265b, 0x6fb077e1, 0x18b74777, |
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0x88085ae6, 0xff0f6a70, 0x66063bca, 0x11010b5c, |
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0x8f659eff, 0xf862ae69, 0x616bffd3, 0x166ccf45, |
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0xa00ae278, 0xd70dd2ee, 0x4e048354, 0x3903b3c2, |
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0xa7672661, 0xd06016f7, 0x4969474d, 0x3e6e77db, |
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0xaed16a4a, 0xd9d65adc, 0x40df0b66, 0x37d83bf0, |
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0xa9bcae53, 0xdebb9ec5, 0x47b2cf7f, 0x30b5ffe9, |
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0xbdbdf21c, 0xcabac28a, 0x53b39330, 0x24b4a3a6, |
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0xbad03605, 0xcdd70693, 0x54de5729, 0x23d967bf, |
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0xb3667a2e, 0xc4614ab8, 0x5d681b02, 0x2a6f2b94, |
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0xb40bbe37, 0xc30c8ea1, 0x5a05df1b, 0x2d02ef8d, |
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0 |
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}; |
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static uint32_t crc32(uint8_t* buf, uint32_t len) |
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{ |
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register int i; |
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uint32_t sum; |
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register uint32_t s0; |
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s0 = ~0; |
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for (i = 0; i < len; i++) |
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{ |
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s0 = (s0 >> 8) ^ crctab[(uint8_t) (s0 & 0xFF) ^ buf[i]]; |
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} |
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sum = ~s0; |
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return sum; |
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} |
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#define HEADERSIZE 60 |
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#define MAGIC "GMTKRT400N" |
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// global variables
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uint8_t kernelbuf[0x100000]; // kernel - lzma - uImage
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uint8_t rootfsbuf[0x2FFFC4]; // root - squashfs
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uint8_t buf[0x400000]; // buffer for image
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// Header format:
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@ -41,6 +117,27 @@ |
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// GPL Tarball: http://downloads.linksysbycisco.com/downloads/WRT400N_1.0.01.19_US.tar,0.gz
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// File: WRT400N_1.0.01.19_US/FW_WRT400N_1.0.01.19_US_20081229/GTK/user/include/fw_upgrade.h
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//
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//
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// Struct:
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// typedef struct
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// {
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// UINT32 checksum; /* CRC32 */
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// UINT8 magic[11]; /* The value of GTIMG_MAGIC */
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// UINT32 kernel_length; /* The length of the kernel image */
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// //UINT32 kernel_entry_point; /* Kernel's entry point for RedBoot's information */
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// UINT32 kernel_upgrade_flag; /* Set to 1 if we need to upgrade the kernel parition of the Flash */
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// UINT32 rootfs_length; /* The length of the rootfs image */
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// //UINT32 rootfs_entry_point; /* Not in use */
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// UINT32 rootfs_upgrade_flag; /* Set to 1 if we need to upgrade the rootfs parition of the Flash */
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//
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// // Add 3 items by Vic Yu, 2006-05/10
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// UINT32 kernel_checksum;
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// UINT32 rootfs_checksum;
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// UINT32 fw_totalsize;
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// UINT32 reserved[4];
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// }imghdr_t , *pLinuxFWHeader_T;
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//
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//
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// Description
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// - checksum: CRC32 of kernel and root fs, back to back
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// - magic: GMTKRT400N
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@ -54,214 +151,186 @@ |
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// set to 0xFF upto 0x2FFFC4 bytes (total length)
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// - fw_totalsize: total firmware image file length (header length + kernel length + root fs length)
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// - reserved[4]: reserved ??? - set to all 0xFF
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struct imghdr_t |
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{ |
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uint32_t checksum; /* CRC32 */ |
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uint8_t magic[12]; /* The value of GTIMG_MAGIC */ |
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uint32_t kernel_length; /* The length of the kernel image */ |
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//uint32_t kernel_entry_point; /* Kernel's entry point for RedBoot's information */
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uint32_t kernel_upgrade_flag; /* Set to 1 if we need to upgrade the kernel parition of the Flash */ |
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uint32_t rootfs_length; /* The length of the rootfs image */ |
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//uint32_t rootfs_entry_point; /* Not in use */
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uint32_t rootfs_upgrade_flag; /* Set to 1 if we need to upgrade the rootfs parition of the Flash */ |
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// Add 3 items by Vic Yu, 2006-05/10
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uint32_t kernel_checksum; |
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uint32_t rootfs_checksum; |
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uint32_t fw_totalsize; |
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uint32_t reserved[4]; |
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}; |
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struct file_info { |
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char *filename; |
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int filesize; |
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int fd; |
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uint32_t crc32sum; |
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int crc_sz; |
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}; |
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int get_file_info(struct file_info *fi, uint32_t *crc32_acc) |
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int main(int argc, char *argv[]) |
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{ |
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int fd; |
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int filesize = 0; |
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uint32_t crc32sum = 0; |
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uint32_t _crc32_acc; |
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int crc_rem = fi->crc_sz; |
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int sz; |
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char buf[1024]; |
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if (crc32_acc) |
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_crc32_acc = *crc32_acc; |
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else |
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_crc32_acc = 0; |
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fd = open(fi->filename, O_RDONLY); |
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if(fd < 0) { |
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fprintf(stderr, "error: opening '%s'\n", fi->filename); |
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return -1; |
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} |
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while (true) { |
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sz = read(fd, buf, sizeof(buf)); |
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if (sz > 0) { |
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if (crc32_acc) |
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_crc32_acc = cyg_crc32_accumulate(_crc32_acc, buf, sz); |
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if (crc_rem > 0) { |
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if (crc_rem < sz) { |
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crc32sum = cyg_crc32_accumulate(crc32sum, buf, crc_rem); |
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crc_rem = 0; |
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} else { |
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crc32sum = cyg_crc32_accumulate(crc32sum, buf, sz); |
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crc_rem -= sz; |
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} |
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} |
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filesize += sz; |
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} else if (sz == 0) { |
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break; |
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} else { |
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fprintf(stderr, "error read '%s'", strerror(errno)); |
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return -1; |
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} |
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} |
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// file descriptors ...
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int kernelfd = -1; |
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int rootfsfd = -1; |
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int outfd = -1; |
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if (crc_rem) { |
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memset(buf, 0xff, sizeof(buf)); |
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while (crc_rem > 0) { |
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if (crc_rem > sizeof(buf)) { |
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crc32sum = cyg_crc32_accumulate(crc32sum, buf, sizeof(buf)); |
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crc_rem -= sizeof(buf); |
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} else { |
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crc32sum = cyg_crc32_accumulate(crc32sum, buf, crc_rem); |
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crc_rem = 0; |
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break; |
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} |
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} |
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} |
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char* kernelfilename = NULL; |
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char* rootfsfilename = NULL; |
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char* outputfilename = NULL; |
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fi->fd = fd; |
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fi->filesize = filesize; |
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fi->crc32sum = crc32sum; |
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if (crc32_acc) |
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*crc32_acc = _crc32_acc; |
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return 0; |
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} |
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// file sizes
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uint32_t kernelsize = 0; |
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uint32_t rootfssize = 0; |
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uint32_t totalsize = 0; |
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int copy_file(int fromfd, int tofd) |
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{ |
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int szr, szw; |
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int buf[4096]; |
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// header flags
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uint32_t kernelflag = 0; |
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uint32_t rootfsflag = 0; |
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if (lseek(fromfd, SEEK_SET, 0) < 0) { |
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fprintf(stderr, "lseek: %s\n", strerror(errno)); |
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return -1; |
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} |
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while (true) { |
|
|
|
|
szr = read(fromfd, buf, sizeof(buf)); |
|
|
|
|
if (szr > 0) { |
|
|
|
|
szw = write(tofd, buf, szr); |
|
|
|
|
if (szw != szr) { |
|
|
|
|
fprintf(stderr, "copy_file: error writing %d bytes: %s\n", szr, strerror(errno)); |
|
|
|
|
return -1; |
|
|
|
|
} |
|
|
|
|
} else if (szr == 0) { |
|
|
|
|
break; |
|
|
|
|
} else { |
|
|
|
|
fprintf(stderr, "copy_file: error reading: %s\n", strerror(errno)); |
|
|
|
|
return -1; |
|
|
|
|
} |
|
|
|
|
} |
|
|
|
|
return 0; |
|
|
|
|
} |
|
|
|
|
// checksums
|
|
|
|
|
uint32_t kernelchecksum = 0; |
|
|
|
|
uint32_t rootfschecksum = 0; |
|
|
|
|
uint32_t crc = 0; |
|
|
|
|
|
|
|
|
|
int main(int argc, char *argv[]) |
|
|
|
|
{ |
|
|
|
|
struct file_info kernel_fi; |
|
|
|
|
struct file_info rootfs_fi; |
|
|
|
|
struct file_info output_fi; |
|
|
|
|
struct imghdr_t ih; |
|
|
|
|
int fd, sz; |
|
|
|
|
int ret = -1; |
|
|
|
|
|
|
|
|
|
if(argc != 4) { |
|
|
|
|
if(argc != 4) |
|
|
|
|
{ |
|
|
|
|
printf("Usage:\n\t%s <kernel file> <rootfs file> <output file>\n", argv[0]); |
|
|
|
|
return 1; |
|
|
|
|
} |
|
|
|
|
|
|
|
|
|
kernel_fi.crc_sz = CRC_SZ_KERNEL; |
|
|
|
|
rootfs_fi.crc_sz = CRC_SZ_ROOTFS; |
|
|
|
|
kernelfilename = argv[1]; |
|
|
|
|
rootfsfilename = argv[2]; |
|
|
|
|
outputfilename = argv[3]; |
|
|
|
|
|
|
|
|
|
kernel_fi.fd = -1; |
|
|
|
|
rootfs_fi.fd = -1; |
|
|
|
|
output_fi.fd = -1; |
|
|
|
|
// Fill the kernel, rootfs, main buffer
|
|
|
|
|
memset(kernelbuf, 0xFF, sizeof(kernelbuf)); |
|
|
|
|
memset(rootfsbuf, 0xFF, sizeof(rootfsbuf)); |
|
|
|
|
memset(buf, 0xFF, sizeof(buf)); |
|
|
|
|
|
|
|
|
|
kernel_fi.filename = argv[1]; |
|
|
|
|
rootfs_fi.filename = argv[2]; |
|
|
|
|
output_fi.filename = argv[3]; |
|
|
|
|
// open the kernel ..
|
|
|
|
|
kernelfd = open(kernelfilename, O_RDONLY); |
|
|
|
|
|
|
|
|
|
kernel_fi.crc32sum = 0; |
|
|
|
|
rootfs_fi.crc32sum = 0; |
|
|
|
|
output_fi.crc32sum = 0xffffffff; |
|
|
|
|
|
|
|
|
|
if (get_file_info(&kernel_fi, &output_fi.crc32sum) < 0) |
|
|
|
|
if(kernelfd == -1) |
|
|
|
|
{ |
|
|
|
|
printf("Error: opening '%s'\n", kernelfilename); |
|
|
|
|
goto done; |
|
|
|
|
if (get_file_info(&rootfs_fi, &output_fi.crc32sum) < 0) |
|
|
|
|
} |
|
|
|
|
|
|
|
|
|
// read in the kernel ...
|
|
|
|
|
kernelsize = read(kernelfd, kernelbuf, sizeof(kernelbuf)); |
|
|
|
|
|
|
|
|
|
if(kernelsize == -1) |
|
|
|
|
{ |
|
|
|
|
printf("Error: reading '%s'\n", kernelfilename); |
|
|
|
|
goto done; |
|
|
|
|
output_fi.crc32sum = ~output_fi.crc32sum; |
|
|
|
|
} |
|
|
|
|
|
|
|
|
|
// calculate the kernel checksum ...
|
|
|
|
|
kernelchecksum = cyg_crc32_accumulate(0, kernelbuf, sizeof(kernelbuf)); |
|
|
|
|
|
|
|
|
|
// print out stats
|
|
|
|
|
fprintf(stderr, "%s: size %d (0x%x), crc32 = 0x%x\n", |
|
|
|
|
kernel_fi.filename, kernel_fi.filesize, kernel_fi.filesize, kernel_fi.crc32sum); |
|
|
|
|
fprintf(stderr, "%s: size %d (0x%x), crc32 = 0x%x\n", |
|
|
|
|
rootfs_fi.filename, rootfs_fi.filesize, rootfs_fi.filesize, rootfs_fi.crc32sum); |
|
|
|
|
if (kernel_fi.filesize > SZ_MAX_KERNEL) { |
|
|
|
|
fprintf(stderr, "%s: filesize exceeds 0x%x limit\n", SZ_MAX_KERNEL); |
|
|
|
|
printf("%s: size %d (0x%x), crc32 = 0x%x\n", kernelfilename, kernelsize, kernelsize, kernelchecksum); |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
// open the root fs ..
|
|
|
|
|
rootfsfd = open(rootfsfilename, O_RDONLY); |
|
|
|
|
|
|
|
|
|
if(rootfsfd == -1) |
|
|
|
|
{ |
|
|
|
|
printf("Error: opening '%s'\n", rootfsfilename); |
|
|
|
|
goto done; |
|
|
|
|
} |
|
|
|
|
if (rootfs_fi.filesize > SZ_MAX_ROOTFS) { |
|
|
|
|
fprintf(stderr, "%s: filesize exceeds 0x%x limit\n", SZ_MAX_ROOTFS); |
|
|
|
|
|
|
|
|
|
// read in the root fs ..
|
|
|
|
|
rootfssize = read(rootfsfd, rootfsbuf, sizeof(rootfsbuf)); |
|
|
|
|
|
|
|
|
|
if(rootfssize == -1) |
|
|
|
|
{ |
|
|
|
|
printf("Error: reading '%s'\n", rootfsfilename); |
|
|
|
|
goto done; |
|
|
|
|
} |
|
|
|
|
|
|
|
|
|
// calculate the root fs checksum ...
|
|
|
|
|
rootfschecksum = cyg_crc32_accumulate(0, rootfsbuf, sizeof(rootfsbuf)); |
|
|
|
|
|
|
|
|
|
// print out stats
|
|
|
|
|
printf("%s: size %d (0x%x), crc32 = 0x%x\n", rootfsfilename, rootfssize, rootfssize, rootfschecksum); |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
// now for the header ...
|
|
|
|
|
memset(&ih, 0xff, sizeof(ih)); |
|
|
|
|
strcpy(ih.magic, "GMTKRT400N"); |
|
|
|
|
ih.checksum = htonl(output_fi.crc32sum); |
|
|
|
|
ih.kernel_length = htonl(kernel_fi.filesize); |
|
|
|
|
ih.rootfs_length = htonl(rootfs_fi.filesize); |
|
|
|
|
ih.kernel_upgrade_flag = htonl(0x1); |
|
|
|
|
ih.rootfs_upgrade_flag = htonl(0x1); |
|
|
|
|
ih.kernel_checksum = htonl(kernel_fi.crc32sum); |
|
|
|
|
ih.rootfs_checksum = htonl(rootfs_fi.crc32sum); |
|
|
|
|
ih.fw_totalsize = htonl(kernel_fi.filesize + rootfs_fi.filesize + sizeof(ih)); |
|
|
|
|
|
|
|
|
|
output_fi.fd = open(output_fi.filename, O_WRONLY | O_CREAT | O_TRUNC, |
|
|
|
|
S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH); |
|
|
|
|
sz = write(output_fi.fd, &ih, sizeof(ih)); |
|
|
|
|
if (sz != sizeof(ih)) { |
|
|
|
|
fprintf(stderr, "error writing imghdr to output: %s\n", strerror(errno)); |
|
|
|
|
goto done; |
|
|
|
|
|
|
|
|
|
totalsize = HEADERSIZE; |
|
|
|
|
|
|
|
|
|
// copy over kernel
|
|
|
|
|
memcpy(buf + totalsize, kernelbuf, kernelsize); |
|
|
|
|
totalsize += kernelsize; |
|
|
|
|
|
|
|
|
|
// copy over root fs
|
|
|
|
|
memcpy(buf + totalsize, rootfsbuf, rootfssize); |
|
|
|
|
totalsize += rootfssize; |
|
|
|
|
|
|
|
|
|
// calculate crc
|
|
|
|
|
crc = crc32(buf + HEADERSIZE, totalsize - HEADERSIZE); |
|
|
|
|
|
|
|
|
|
// print some stats out
|
|
|
|
|
printf("crc = 0x%x, total size = %d (0x%x)\n", crc, totalsize, totalsize); |
|
|
|
|
|
|
|
|
|
// copy crc into header
|
|
|
|
|
crc = htonl(crc); |
|
|
|
|
memcpy(buf, &crc, sizeof(crc)); |
|
|
|
|
|
|
|
|
|
// copy over magic
|
|
|
|
|
strcpy((char *)buf + 4, MAGIC); |
|
|
|
|
|
|
|
|
|
// copy over kernel size
|
|
|
|
|
kernelsize = htonl(kernelsize); |
|
|
|
|
memcpy(buf + 16, &kernelsize, sizeof(kernelsize)); |
|
|
|
|
|
|
|
|
|
// copy over kernal flag
|
|
|
|
|
kernelflag = htonl(0x1); |
|
|
|
|
memcpy(buf + 20, &kernelflag, sizeof(kernelflag)); |
|
|
|
|
|
|
|
|
|
// copy over root fs size
|
|
|
|
|
rootfssize = htonl(rootfssize); |
|
|
|
|
memcpy(buf + 24, &rootfssize, sizeof(rootfssize)); |
|
|
|
|
|
|
|
|
|
// copy over root fs flag
|
|
|
|
|
rootfsflag = htonl(0x1); |
|
|
|
|
memcpy(buf + 28, &rootfsflag, sizeof(rootfsflag)); |
|
|
|
|
|
|
|
|
|
// copy over kernel check sum
|
|
|
|
|
kernelchecksum = htonl(kernelchecksum); |
|
|
|
|
memcpy(buf + 32, &kernelchecksum, sizeof(kernelchecksum)); |
|
|
|
|
|
|
|
|
|
// copy over root fs checksum
|
|
|
|
|
rootfschecksum = htonl(rootfschecksum); |
|
|
|
|
memcpy(buf + 36, &rootfschecksum, sizeof(rootfschecksum)); |
|
|
|
|
|
|
|
|
|
// copy over total size
|
|
|
|
|
totalsize = htonl(totalsize); |
|
|
|
|
memcpy(buf + 40, &totalsize, sizeof(totalsize)); |
|
|
|
|
|
|
|
|
|
// undo the htonl (for write)
|
|
|
|
|
totalsize = htonl(totalsize); |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
// write out the file from the buffer
|
|
|
|
|
outfd = open(outputfilename, O_CREAT | O_WRONLY | O_TRUNC, S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH); |
|
|
|
|
|
|
|
|
|
if(outfd == -1) |
|
|
|
|
{ |
|
|
|
|
printf("ERROR: opening '%s' for write\n", outputfilename); |
|
|
|
|
} |
|
|
|
|
if (copy_file(kernel_fi.fd, output_fi.fd)) { |
|
|
|
|
fprintf(stderr, "error copying %s to %s\n", kernel_fi.filename, output_fi.filename); |
|
|
|
|
goto done; |
|
|
|
|
|
|
|
|
|
write(outfd, buf, totalsize); |
|
|
|
|
|
|
|
|
|
done: |
|
|
|
|
// close open fd's
|
|
|
|
|
|
|
|
|
|
if(kernelfd != -1) |
|
|
|
|
{ |
|
|
|
|
close(kernelfd); |
|
|
|
|
kernelfd = -1; |
|
|
|
|
} |
|
|
|
|
if (copy_file(rootfs_fi.fd, output_fi.fd)) { |
|
|
|
|
fprintf(stderr, "error copying %s to %s\n", rootfs_fi.filename, output_fi.filename); |
|
|
|
|
goto done; |
|
|
|
|
|
|
|
|
|
if(rootfsfd != -1) |
|
|
|
|
{ |
|
|
|
|
close(rootfsfd); |
|
|
|
|
rootfsfd = -1; |
|
|
|
|
} |
|
|
|
|
// print some stats out
|
|
|
|
|
fprintf(stderr, "crc = 0x%x, total size = %d (0x%x)\n", |
|
|
|
|
output_fi.crc32sum, ntohl(ih.fw_totalsize), ntohl(ih.fw_totalsize)); |
|
|
|
|
ret = 0; |
|
|
|
|
|
|
|
|
|
done: |
|
|
|
|
#define CLOSE_FI_FD(fi) do { \ |
|
|
|
|
if ((fi).fd >= 0) { \
|
|
|
|
|
close((fi).fd); \
|
|
|
|
|
} \
|
|
|
|
|
} while (0) |
|
|
|
|
|
|
|
|
|
CLOSE_FI_FD(kernel_fi); |
|
|
|
|
CLOSE_FI_FD(rootfs_fi); |
|
|
|
|
CLOSE_FI_FD(output_fi); |
|
|
|
|
return ret; |
|
|
|
|
if(outfd != -1) |
|
|
|
|
{ |
|
|
|
|
close(outfd); |
|
|
|
|
outfd = -1; |
|
|
|
|
} |
|
|
|
|
|
|
|
|
|
return 0; |
|
|
|
|
} |
|
|
|
|