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/*
* Copyright (C) 2011-2014 Codethink Ltd.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License Version 2 as
* published by the Free Software Foundation.
*
* 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.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include <stdlib.h>
#include <stdio.h>
#include <stdint.h>
#include <errno.h>
#include <fcntl.h>
#include <unistd.h>
#include <tbdiff/tbdiff.h>
int
main(int argc,
char **argv)
{
if(argc < 4) {
fprintf(stderr, "Usage: %s OUTPUT SOURCE_DIR TARGET_DIR.\n", argv[0]);
return EXIT_FAILURE;
}
size_t cwd_size = pathconf(".", _PC_PATH_MAX);
char cwd_buff[cwd_size];
if(getcwd(cwd_buff, cwd_size) == NULL)
return EXIT_FAILURE;
struct tbd_stat *tstat[2];
tstat[0] = tbd_stat(argv[2]);
if(tstat[0] == NULL) {
fprintf(stderr, "Error: Unable to stat '%s'.\n", argv[2]);
return EXIT_FAILURE;
}
if(chdir(cwd_buff) != 0) {
fprintf(stderr, "Error: Unable to return to '%s'.\n", cwd_buff);
return EXIT_FAILURE;
}
tstat[1] = tbd_stat(argv[3]);
if(tstat[1] == NULL) {
fprintf(stderr, "Error: Unable to stat '%s'.\n", argv[3]);
return EXIT_FAILURE;
}
if (chdir(cwd_buff) != 0) {
fprintf(stderr, "Error: Unable to return to '%s'.\n", cwd_buff);
return EXIT_FAILURE;
}
int fd = open(argv[1],
O_WRONLY | O_CREAT | O_TRUNC,
S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH);
if(fd < 0) {
fprintf(stderr, "Error(%d): Unable to open patch for writing.\n", errno);
return EXIT_FAILURE;
}
int err;
if((err = tbd_create(fd, tstat[0], tstat[1])) != 0) {
close(fd);
tbd_stat_free(tstat[0]);
tbd_stat_free(tstat[1]);
remove(argv[1]);
fprintf(stderr, "Error: Failed to create tbdiff image (err=%d).\n", err);
switch (err) {
case TBD_ERROR_UNABLE_TO_CREATE_SOCKET_FILE:
fprintf(stderr, "%s directory contains Unix Sockets. "
"%s cannot create sockets, please ensure no "
"programs are using sockets in directory.\n",
argv[3], argv[0]);
break;
default:
break;
}
return EXIT_FAILURE;
}
close(fd);
tbd_stat_free(tstat[0]);
tbd_stat_free(tstat[1]);
return EXIT_SUCCESS;
}
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