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/*
* iohelper.c: Helper program to perform I/O operations on files
*
* Copyright (C) 2011-2012 Red Hat, Inc.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library. If not, see
* <http://www.gnu.org/licenses/>.
*
* Current support
* - Read existing file
* - Write existing file
* - Create & write new file
*/
#include <config.h>
#include <unistd.h>
#include <fcntl.h>
#include <stdlib.h>
#include <sys/types.h>
#include <sys/stat.h>
#include "virfile.h"
#include "virerror.h"
#include "virstring.h"
#include "virgettext.h"
#define VIR_FROM_THIS VIR_FROM_STORAGE
static const char *program_name;
G_GNUC_NORETURN static void
usage(int status)
{
if (status) {
fprintf(stderr, _("%s: try --help for more details"), program_name);
} else {
printf(_("Usage: %s FILENAME FD"), program_name);
}
exit(status);
}
int
main(int argc, char **argv)
{
const char *path;
int fd = -1;
program_name = argv[0];
if (virGettextInitialize() < 0 ||
virErrorInitialize() < 0) {
fprintf(stderr, _("%s: initialization failed"), program_name);
exit(EXIT_FAILURE);
}
path = argv[1];
if (argc > 1 && STREQ(argv[1], "--help"))
usage(EXIT_SUCCESS);
if (argc == 3) { /* FILENAME FD */
if (virStrToLong_i(argv[2], NULL, 10, &fd) < 0) {
fprintf(stderr, _("%s: malformed fd %s"),
program_name, argv[3]);
exit(EXIT_FAILURE);
}
} else { /* unknown argc pattern */
usage(EXIT_FAILURE);
}
if (fd < 0 || virFileDiskCopy(fd, path, -1, "stdio") < 0)
goto error;
return 0;
error:
fprintf(stderr, _("%s: failure with %s: %s"),
program_name, path, virGetLastErrorMessage());
exit(EXIT_FAILURE);
}
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