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e349cdc54b
Signed-off-by: Jiri Denemark <jdenemar@redhat.com> Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
92 lines
2.3 KiB
C
92 lines
2.3 KiB
C
/*
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* iohelper.c: Helper program to perform I/O operations on files
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*
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* Copyright (C) 2011-2012 Red Hat, Inc.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library. If not, see
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* <http://www.gnu.org/licenses/>.
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*
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* Current support
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* - Read existing file
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* - Write existing file
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* - Create & write new file
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*/
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#include <config.h>
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#include <unistd.h>
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#include <fcntl.h>
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#include <stdlib.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include "virfile.h"
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#include "virerror.h"
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#include "virstring.h"
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#include "virgettext.h"
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#define VIR_FROM_THIS VIR_FROM_STORAGE
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static const char *program_name;
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G_GNUC_NORETURN static void
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usage(int status)
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{
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if (status) {
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fprintf(stderr, _("%1$s: try --help for more details"), program_name);
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} else {
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printf(_("Usage: %1$s FILENAME FD"), program_name);
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}
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exit(status);
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}
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int
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main(int argc, char **argv)
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{
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const char *path;
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int fd = -1;
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program_name = argv[0];
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if (virGettextInitialize() < 0 ||
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virErrorInitialize() < 0) {
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fprintf(stderr, _("%1$s: initialization failed"), program_name);
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exit(EXIT_FAILURE);
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}
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path = argv[1];
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if (argc > 1 && STREQ(argv[1], "--help"))
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usage(EXIT_SUCCESS);
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if (argc == 3) { /* FILENAME FD */
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if (virStrToLong_i(argv[2], NULL, 10, &fd) < 0) {
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fprintf(stderr, _("%1$s: malformed fd %2$s"),
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program_name, argv[3]);
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exit(EXIT_FAILURE);
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}
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} else { /* unknown argc pattern */
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usage(EXIT_FAILURE);
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}
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if (fd < 0 || virFileDiskCopy(fd, path, -1, "stdio") < 0)
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goto error;
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return 0;
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error:
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fprintf(stderr, _("%1$s: failure with %2$s: %3$s"),
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program_name, path, virGetLastErrorMessage());
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exit(EXIT_FAILURE);
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}
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