mirror of
https://github.com/brain-hackers/u-boot-brain
synced 2024-08-25 03:18:51 +09:00
![Simon Glass](/assets/img/avatar_default.png)
Drop inclusion of crc.h in common.h and use the correct header directly instead. With this we can drop the conflicting definition in fw_env.h and rely on the crc.h header, which is already included. Signed-off-by: Simon Glass <sjg@chromium.org> Reviewed-by: Tom Rini <trini@konsulko.com>
287 lines
7.3 KiB
C
287 lines
7.3 KiB
C
// SPDX-License-Identifier: GPL-2.0+
|
|
/*
|
|
* (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
|
|
*/
|
|
|
|
#include <errno.h>
|
|
#include <fcntl.h>
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <stdint.h>
|
|
#include <string.h>
|
|
#include <u-boot/crc.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"
|
|
"\tEmpty lines are skipped, and lines with a # in the first\n"
|
|
"\tcolumn are treated as comments (also skipped).\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);
|
|
}
|
|
|
|
#define CHUNK_SIZE 4096
|
|
|
|
int main(int argc, char **argv)
|
|
{
|
|
uint32_t crc, targetendian_crc;
|
|
const char *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 readbytes = 0;
|
|
|
|
int option;
|
|
int ret = EXIT_SUCCESS;
|
|
|
|
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) {
|
|
txt_fd = STDIN_FILENO;
|
|
} else {
|
|
txt_fd = open(argv[optind], O_RDONLY);
|
|
if (txt_fd == -1) {
|
|
fprintf(stderr, "Can't open \"%s\": %s\n",
|
|
argv[optind], strerror(errno));
|
|
return EXIT_FAILURE;
|
|
}
|
|
}
|
|
|
|
do {
|
|
filebuf = realloc(filebuf, filesize + CHUNK_SIZE);
|
|
if (!filebuf) {
|
|
fprintf(stderr, "Can't realloc memory for the input file buffer\n");
|
|
return EXIT_FAILURE;
|
|
}
|
|
readbytes = read(txt_fd, filebuf + filesize, CHUNK_SIZE);
|
|
if (readbytes < 0) {
|
|
fprintf(stderr, "Error while reading: %s\n",
|
|
strerror(errno));
|
|
return EXIT_FAILURE;
|
|
}
|
|
filesize += readbytes;
|
|
} while (readbytes > 0);
|
|
|
|
if (txt_fd != STDIN_FILENO)
|
|
ret = close(txt_fd);
|
|
|
|
/* Parse a byte at time until reaching the file OR until the environment fills
|
|
* up. Check ep against envsize - 1 to allow for extra trailing '\0'. */
|
|
for (fp = 0, ep = 0 ; fp < filesize && ep < envsize - 1; fp++) {
|
|
if (filebuf[fp] == '\n') {
|
|
if (fp == 0 || filebuf[fp-1] == '\n') {
|
|
/*
|
|
* Skip empty lines.
|
|
*/
|
|
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 if ((fp == 0 || filebuf[fp-1] == '\n') && filebuf[fp] == '#') {
|
|
/* Comment, skip the line. */
|
|
while (++fp < filesize && filebuf[fp] != '\n')
|
|
continue;
|
|
} else {
|
|
envptr[ep++] = filebuf[fp];
|
|
}
|
|
}
|
|
/* If there are more bytes in the file still, it means the env filled up
|
|
* before parsing the whole file. Eat comments & whitespace here to see if
|
|
* there was anything meaning full left in the file, and if so, throw a error
|
|
* and exit. */
|
|
for( ; fp < filesize; fp++ )
|
|
{
|
|
if (filebuf[fp] == '\n') {
|
|
if (fp == 0 || filebuf[fp-1] == '\n') {
|
|
/* Ignore blank lines */
|
|
continue;
|
|
}
|
|
} else if ((fp == 0 || filebuf[fp-1] == '\n') && filebuf[fp] == '#') {
|
|
while (++fp < filesize && filebuf[fp] != '\n')
|
|
continue;
|
|
} else {
|
|
fprintf(stderr, "The environment file is too large for the target environment storage\n");
|
|
return EXIT_FAILURE;
|
|
}
|
|
}
|
|
/*
|
|
* 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;
|
|
}
|