mirror of
https://github.com/brain-hackers/u-boot-brain
synced 2024-08-20 08:58:52 +09:00
![Mike Frysinger](/assets/img/avatar_default.png)
We have a header file specifically for mingw cruft, so keep it there to avoid crap spreading into the main tools. This lets our devs just worry about *nix systems. Signed-off-by: Mike Frysinger <vapier@gentoo.org>
315 lines
8.1 KiB
C
315 lines
8.1 KiB
C
/*
|
|
* (C) Copyright 2011 Free Electrons
|
|
* David Wagner <david.wagner@free-electrons.com>
|
|
*
|
|
* Inspired from envcrc.c:
|
|
* (C) Copyright 2001
|
|
* Paolo Scaffardi, AIRVENT SAM s.p.a - RIMINI(ITALY), arsenio@tin.it
|
|
*
|
|
* See file CREDITS for list of people who contributed to this
|
|
* project.
|
|
*
|
|
* This program is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU General Public License as
|
|
* published by the Free Software Foundation; either version 2 of
|
|
* the License, or (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, write to the Free Software
|
|
* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
|
|
* MA 02111-1307 USA
|
|
*/
|
|
|
|
/* We want the GNU version of basename() */
|
|
#define _GNU_SOURCE
|
|
|
|
#include <errno.h>
|
|
#include <fcntl.h>
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <stdint.h>
|
|
#include <string.h>
|
|
#include <unistd.h>
|
|
#include <libgen.h>
|
|
#include <sys/types.h>
|
|
#include <sys/stat.h>
|
|
#include <sys/mman.h>
|
|
|
|
#include "compiler.h"
|
|
#include <u-boot/crc.h>
|
|
#include <version.h>
|
|
|
|
#define CRC_SIZE sizeof(uint32_t)
|
|
|
|
static void usage(const char *exec_name)
|
|
{
|
|
fprintf(stderr, "%s [-h] [-r] [-b] [-p <byte>] -s <environment partition size> -o <output> <input file>\n"
|
|
"\n"
|
|
"This tool takes a key=value input file (same as would a `printenv' show) and generates the corresponding environment image, ready to be flashed.\n"
|
|
"\n"
|
|
"\tThe input file is in format:\n"
|
|
"\t\tkey1=value1\n"
|
|
"\t\tkey2=value2\n"
|
|
"\t\t...\n"
|
|
"\t-r : the environment has multiple copies in flash\n"
|
|
"\t-b : the target is big endian (default is little endian)\n"
|
|
"\t-p <byte> : fill the image with <byte> bytes instead of 0xff bytes\n"
|
|
"\t-V : print version information and exit\n"
|
|
"\n"
|
|
"If the input file is \"-\", data is read from standard input\n",
|
|
exec_name);
|
|
}
|
|
|
|
long int xstrtol(const char *s)
|
|
{
|
|
long int tmp;
|
|
|
|
errno = 0;
|
|
tmp = strtol(s, NULL, 0);
|
|
if (!errno)
|
|
return tmp;
|
|
|
|
if (errno == ERANGE)
|
|
fprintf(stderr, "Bad integer format: %s\n", s);
|
|
else
|
|
fprintf(stderr, "Error while parsing %s: %s\n", s,
|
|
strerror(errno));
|
|
|
|
exit(EXIT_FAILURE);
|
|
}
|
|
|
|
int main(int argc, char **argv)
|
|
{
|
|
uint32_t crc, targetendian_crc;
|
|
const char *txt_filename = NULL, *bin_filename = NULL;
|
|
int txt_fd, bin_fd;
|
|
unsigned char *dataptr, *envptr;
|
|
unsigned char *filebuf = NULL;
|
|
unsigned int filesize = 0, envsize = 0, datasize = 0;
|
|
int bigendian = 0;
|
|
int redundant = 0;
|
|
unsigned char padbyte = 0xff;
|
|
|
|
int option;
|
|
int ret = EXIT_SUCCESS;
|
|
|
|
struct stat txt_file_stat;
|
|
|
|
int fp, ep;
|
|
const char *prg;
|
|
|
|
prg = basename(argv[0]);
|
|
|
|
/* Turn off getopt()'s internal error message */
|
|
opterr = 0;
|
|
|
|
/* Parse the cmdline */
|
|
while ((option = getopt(argc, argv, ":s:o:rbp:hV")) != -1) {
|
|
switch (option) {
|
|
case 's':
|
|
datasize = xstrtol(optarg);
|
|
break;
|
|
case 'o':
|
|
bin_filename = strdup(optarg);
|
|
if (!bin_filename) {
|
|
fprintf(stderr, "Can't strdup() the output filename\n");
|
|
return EXIT_FAILURE;
|
|
}
|
|
break;
|
|
case 'r':
|
|
redundant = 1;
|
|
break;
|
|
case 'b':
|
|
bigendian = 1;
|
|
break;
|
|
case 'p':
|
|
padbyte = xstrtol(optarg);
|
|
break;
|
|
case 'h':
|
|
usage(prg);
|
|
return EXIT_SUCCESS;
|
|
case 'V':
|
|
printf("%s version %s\n", prg, PLAIN_VERSION);
|
|
return EXIT_SUCCESS;
|
|
case ':':
|
|
fprintf(stderr, "Missing argument for option -%c\n",
|
|
optopt);
|
|
usage(prg);
|
|
return EXIT_FAILURE;
|
|
default:
|
|
fprintf(stderr, "Wrong option -%c\n", optopt);
|
|
usage(prg);
|
|
return EXIT_FAILURE;
|
|
}
|
|
}
|
|
|
|
/* Check datasize and allocate the data */
|
|
if (datasize == 0) {
|
|
fprintf(stderr, "Please specify the size of the environment partition.\n");
|
|
usage(prg);
|
|
return EXIT_FAILURE;
|
|
}
|
|
|
|
dataptr = malloc(datasize * sizeof(*dataptr));
|
|
if (!dataptr) {
|
|
fprintf(stderr, "Can't alloc %d bytes for dataptr.\n",
|
|
datasize);
|
|
return EXIT_FAILURE;
|
|
}
|
|
|
|
/*
|
|
* envptr points to the beginning of the actual environment (after the
|
|
* crc and possible `redundant' byte
|
|
*/
|
|
envsize = datasize - (CRC_SIZE + redundant);
|
|
envptr = dataptr + CRC_SIZE + redundant;
|
|
|
|
/* Pad the environment with the padding byte */
|
|
memset(envptr, padbyte, envsize);
|
|
|
|
/* Open the input file ... */
|
|
if (optind >= argc || strcmp(argv[optind], "-") == 0) {
|
|
int readbytes = 0;
|
|
int readlen = sizeof(*envptr) * 4096;
|
|
txt_fd = STDIN_FILENO;
|
|
|
|
do {
|
|
filebuf = realloc(filebuf, readlen);
|
|
if (!filebuf) {
|
|
fprintf(stderr, "Can't realloc memory for the input file buffer\n");
|
|
return EXIT_FAILURE;
|
|
}
|
|
readbytes = read(txt_fd, filebuf + filesize, readlen);
|
|
if (errno) {
|
|
fprintf(stderr, "Error while reading stdin: %s\n",
|
|
strerror(errno));
|
|
return EXIT_FAILURE;
|
|
}
|
|
filesize += readbytes;
|
|
} while (readbytes == readlen);
|
|
|
|
} else {
|
|
txt_filename = argv[optind];
|
|
txt_fd = open(txt_filename, O_RDONLY);
|
|
if (txt_fd == -1) {
|
|
fprintf(stderr, "Can't open \"%s\": %s\n",
|
|
txt_filename, strerror(errno));
|
|
return EXIT_FAILURE;
|
|
}
|
|
/* ... and check it */
|
|
ret = fstat(txt_fd, &txt_file_stat);
|
|
if (ret == -1) {
|
|
fprintf(stderr, "Can't stat() on \"%s\": %s\n",
|
|
txt_filename, strerror(errno));
|
|
return EXIT_FAILURE;
|
|
}
|
|
|
|
filesize = txt_file_stat.st_size;
|
|
|
|
filebuf = mmap(NULL, sizeof(*envptr) * filesize, PROT_READ,
|
|
MAP_PRIVATE, txt_fd, 0);
|
|
if (filebuf == MAP_FAILED) {
|
|
fprintf(stderr, "mmap (%zu bytes) failed: %s\n",
|
|
sizeof(*envptr) * filesize,
|
|
strerror(errno));
|
|
fprintf(stderr, "Falling back to read()\n");
|
|
|
|
filebuf = malloc(sizeof(*envptr) * filesize);
|
|
ret = read(txt_fd, filebuf, sizeof(*envptr) * filesize);
|
|
if (ret != sizeof(*envptr) * filesize) {
|
|
fprintf(stderr, "Can't read the whole input file (%zu bytes): %s\n",
|
|
sizeof(*envptr) * filesize,
|
|
strerror(errno));
|
|
|
|
return EXIT_FAILURE;
|
|
}
|
|
}
|
|
ret = close(txt_fd);
|
|
}
|
|
/* The +1 is for the additionnal ending \0. See below. */
|
|
if (filesize + 1 > envsize) {
|
|
fprintf(stderr, "The input file is larger than the environment partition size\n");
|
|
return EXIT_FAILURE;
|
|
}
|
|
|
|
/* Replace newlines separating variables with \0 */
|
|
for (fp = 0, ep = 0 ; fp < filesize ; fp++) {
|
|
if (filebuf[fp] == '\n') {
|
|
if (ep == 0) {
|
|
/*
|
|
* Newlines at the beginning of the file ?
|
|
* Ignore them.
|
|
*/
|
|
continue;
|
|
} else if (filebuf[fp-1] == '\\') {
|
|
/*
|
|
* Embedded newline in a variable.
|
|
*
|
|
* The backslash was added to the envptr; rewind
|
|
* and replace it with a newline
|
|
*/
|
|
ep--;
|
|
envptr[ep++] = '\n';
|
|
} else {
|
|
/* End of a variable */
|
|
envptr[ep++] = '\0';
|
|
}
|
|
} else {
|
|
envptr[ep++] = filebuf[fp];
|
|
}
|
|
}
|
|
/*
|
|
* Make sure there is a final '\0'
|
|
* And do it again on the next byte to mark the end of the environment.
|
|
*/
|
|
if (envptr[ep-1] != '\0') {
|
|
envptr[ep++] = '\0';
|
|
/*
|
|
* The text file doesn't have an ending newline. We need to
|
|
* check the env size again to make sure we have room for two \0
|
|
*/
|
|
if (ep >= envsize) {
|
|
fprintf(stderr, "The environment file is too large for the target environment storage\n");
|
|
return EXIT_FAILURE;
|
|
}
|
|
envptr[ep] = '\0';
|
|
} else {
|
|
envptr[ep] = '\0';
|
|
}
|
|
|
|
/* Computes the CRC and put it at the beginning of the data */
|
|
crc = crc32(0, envptr, envsize);
|
|
targetendian_crc = bigendian ? cpu_to_be32(crc) : cpu_to_le32(crc);
|
|
|
|
memcpy(dataptr, &targetendian_crc, sizeof(targetendian_crc));
|
|
if (redundant)
|
|
dataptr[sizeof(targetendian_crc)] = 1;
|
|
|
|
if (!bin_filename || strcmp(bin_filename, "-") == 0) {
|
|
bin_fd = STDOUT_FILENO;
|
|
} else {
|
|
bin_fd = creat(bin_filename, S_IRUSR | S_IWUSR | S_IRGRP |
|
|
S_IWGRP);
|
|
if (bin_fd == -1) {
|
|
fprintf(stderr, "Can't open output file \"%s\": %s\n",
|
|
bin_filename, strerror(errno));
|
|
return EXIT_FAILURE;
|
|
}
|
|
}
|
|
|
|
if (write(bin_fd, dataptr, sizeof(*dataptr) * datasize) !=
|
|
sizeof(*dataptr) * datasize) {
|
|
fprintf(stderr, "write() failed: %s\n", strerror(errno));
|
|
return EXIT_FAILURE;
|
|
}
|
|
|
|
ret = close(bin_fd);
|
|
|
|
return ret;
|
|
}
|