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/* qcow-create.c
*
* Generates a qcow format disk.
*
* (c) 2006 Andrew Warfield and Julian Chesterfield
*
* 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; or, when distributed
* separately from the Linux kernel or incorporated into other
* software packages, subject to the following license:
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this source file (the "Software"), to deal in the Software without
* restriction, including without limitation the rights to use, copy, modify,
* merge, publish, distribute, sublicense, and/or sell copies of the Software,
* and to permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
* IN THE SOFTWARE.
*/
#include <errno.h>
#include <fcntl.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <sys/statvfs.h>
#include <sys/stat.h>
#include <sys/ioctl.h>
#include <string.h>
#include "tapdisk.h"
#include "qcow.h"
#if 1
#define DFPRINTF(_f, _a...) fprintf ( stderr, _f , ## _a )
#else
#define DFPRINTF(_f, _a...) ((void)0)
#endif
#define MAX_NAME_LEN 1000
void help(void)
{
fprintf(stderr, "Qcow-utils: v1.0.0\n");
fprintf(stderr,
"usage: qcow-create [-h help] [-r reserve] <SIZE(MB)> <FILENAME> "
"[<BACKING_FILENAME>]\n");
exit(-1);
}
int main(int argc, char *argv[])
{
int ret = -1, c, backed = 0;
int sparse = 1;
uint64_t size;
char filename[MAX_NAME_LEN], bfilename[MAX_NAME_LEN];
for(;;) {
c = getopt(argc, argv, "hr");
if (c == -1)
break;
switch(c) {
case 'h':
help();
exit(0);
break;
case 'r':
sparse = 0;
break;
default:
fprintf(stderr, "Unknown option\n");
help();
}
}
printf("Optind %d, argc %d\n", optind, argc);
if ( !(optind == (argc - 2) || optind == (argc - 3)) )
help();
size = atoi(argv[optind++]);
size = size << 20;
if (snprintf(filename, MAX_NAME_LEN, "%s",argv[optind++]) >=
MAX_NAME_LEN) {
fprintf(stderr,"Device name too long\n");
exit(-1);
}
if (optind != argc) {
/*Backing file argument*/
backed = 1;
if (snprintf(bfilename, MAX_NAME_LEN, "%s",argv[optind++]) >=
MAX_NAME_LEN) {
fprintf(stderr,"Device name too long\n");
exit(-1);
}
}
DFPRINTF("Creating file size %"PRIu64", name %s\n",(uint64_t)size, filename);
if (!backed)
ret = qcow_create(filename,size,NULL,sparse);
else
ret = qcow_create(filename,size,bfilename,sparse);
if (ret < 0)
DPRINTF("Unable to create QCOW file\n");
else
DPRINTF("QCOW file successfully created\n");
return 0;
}
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