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107 lines
2.8 KiB
C
107 lines
2.8 KiB
C
/* Copyright (c) 2008, XenSource Inc.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* * Neither the name of XenSource Inc. nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER
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* OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <errno.h>
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#include <fcntl.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include "libvhd.h"
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int
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vhd_util_set_field(int argc, char **argv)
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{
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long value;
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int err, c;
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off_t eof;
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vhd_context_t vhd;
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char *name, *field;
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err = -EINVAL;
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value = 0;
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name = NULL;
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field = NULL;
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if (!argc || !argv)
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goto usage;
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optind = 0;
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while ((c = getopt(argc, argv, "n:f:v:h")) != -1) {
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switch (c) {
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case 'n':
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name = optarg;
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break;
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case 'f':
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field = optarg;
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break;
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case 'v':
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err = 0;
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value = strtol(optarg, NULL, 10);
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break;
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case 'h':
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default:
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goto usage;
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}
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}
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if (!name || !field || optind != argc || err)
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goto usage;
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if (strnlen(field, 25) >= 25) {
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printf("invalid field\n");
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goto usage;
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}
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if (strcmp(field, "hidden")) {
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printf("invalid field %s\n", field);
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goto usage;
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}
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if (value < 0 || value > 255) {
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printf("invalid value %ld\n", value);
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goto usage;
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}
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err = vhd_open(&vhd, name, VHD_OPEN_RDWR);
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if (err) {
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printf("error opening %s: %d\n", name, err);
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return err;
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}
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vhd.footer.hidden = (char)value;
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err = vhd_write_footer(&vhd, &vhd.footer);
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done:
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vhd_close(&vhd);
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return err;
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usage:
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printf("options: <-n name> <-f field> <-v value> [-h help]\n");
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return -EINVAL;
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}
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