* (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
+ * SPDX-License-Identifier: GPL-2.0+
*/
-/* 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 <compiler.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>
"\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"
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;
while ((option = getopt(argc, argv, ":s:o:rbp:hV")) != -1) {
switch (option) {
case 's':
- datasize = strtol(optarg, NULL, 0);
+ datasize = xstrtol(optarg);
break;
case 'o':
bin_filename = strdup(optarg);
bigendian = 1;
break;
case 'p':
- padbyte = strtol(optarg, NULL, 0);
+ padbyte = xstrtol(optarg);
break;
case 'h':
usage(prg);
memset(envptr, padbyte, envsize);
/* Open the input file ... */
- if (optind >= argc) {
- fprintf(stderr, "Please specify an input filename\n");
- return EXIT_FAILURE;
- }
-
- txt_filename = argv[optind];
- if (strcmp(txt_filename, "-") == 0) {
+ if (optind >= argc || strcmp(argv[optind], "-") == 0) {
int readbytes = 0;
- int readlen = sizeof(*envptr) * 2048;
+ 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",
}
filesize = txt_file_stat.st_size;
- /* Read the raw input file and transform it */
- 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\n");
- return EXIT_FAILURE;
+
+ 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++) {
+ /* 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 (ep == 0) {
+ if (fp == 0 || filebuf[fp-1] == '\n') {
/*
- * Newlines at the beginning of the file ?
- * Ignore them.
+ * Skip empty lines.
*/
continue;
} else if (filebuf[fp-1] == '\\') {
/* End of a variable */
envptr[ep++] = '\0';
}
- } else if (filebuf[fp] == '#') {
- if (fp != 0 && filebuf[fp-1] == '\n') {
- /* This line is a comment, let's skip it */
- while (fp < txt_file_stat.st_size && fp++ &&
- filebuf[fp] != '\n');
- } else {
- envptr[ep++] = filebuf[fp];
- }
+ } 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.
crc = crc32(0, envptr, envsize);
targetendian_crc = bigendian ? cpu_to_be32(crc) : cpu_to_le32(crc);
- memcpy(dataptr, &targetendian_crc, sizeof(uint32_t));
+ memcpy(dataptr, &targetendian_crc, sizeof(targetendian_crc));
+ if (redundant)
+ dataptr[sizeof(targetendian_crc)] = 1;
- 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 (!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) !=
projects / karo-tx-uboot.git / blobdiff