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131 lines
3.7 KiB
C
131 lines
3.7 KiB
C
/* qcow-create.c
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*
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* Generates a qcow format disk.
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*
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* (c) 2006 Andrew Warfield and Julian Chesterfield
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License version 2
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* as published by the Free Software Foundation; or, when distributed
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* separately from the Linux kernel or incorporated into other
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* software packages, subject to the following license:
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this source file (the "Software"), to deal in the Software without
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* restriction, including without limitation the rights to use, copy, modify,
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* merge, publish, distribute, sublicense, and/or sell copies of the Software,
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* and to permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
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* IN THE SOFTWARE.
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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 <sys/statvfs.h>
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#include <sys/stat.h>
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#include <sys/ioctl.h>
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#include <string.h>
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#include "tapdisk.h"
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#if 1
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#define DFPRINTF(_f, _a...) fprintf ( stderr, _f , ## _a )
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#else
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#define DFPRINTF(_f, _a...) ((void)0)
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#endif
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#define MAX_NAME_LEN 1000
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static void help(void)
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{
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fprintf(stderr, "Qcow-utils: v1.0.0\n");
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fprintf(stderr,
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"usage: qcow-create [-h help] [-r reserve] [-f format] <SIZE(MB)> <FILENAME> "
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"[<BACKING_FILENAME>]\n");
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exit(-1);
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}
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int main(int argc, char *argv[])
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{
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int ret = -1, c, backed = 0;
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int sparse = 1;
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char *fmt = "qcow";
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uint64_t size;
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char filename[MAX_NAME_LEN], bfilename[MAX_NAME_LEN];
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char *tmpfile;
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for(;;) {
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c = getopt(argc, argv, "hrf");
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if (c == -1)
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break;
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switch(c) {
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case 'h':
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help();
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exit(0);
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break;
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case 'f':
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fmt = argv[optind++];
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break;
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case 'r':
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sparse = 0;
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break;
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default:
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fprintf(stderr, "Unknown option\n");
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help();
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}
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}
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printf("Optind %d, argc %d\n", optind, argc);
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if ( !(optind == (argc - 2) || optind == (argc - 3)) )
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help();
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size = atoi(argv[optind++]);
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size = size << 20;
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if (snprintf(filename, MAX_NAME_LEN, "%s",argv[optind++]) >=
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MAX_NAME_LEN) {
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fprintf(stderr,"Device name too long\n");
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exit(-1);
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}
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if (optind != argc) {
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/*Backing file argument*/
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backed = 1;
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if (snprintf(bfilename, MAX_NAME_LEN, "%s",argv[optind++]) >=
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MAX_NAME_LEN) {
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fprintf(stderr,"Device name too long\n");
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exit(-1);
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}
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}
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tmpfile = backed ? bfilename: NULL;
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if (!strcmp(fmt, "qcow")) {
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ret = qcow_create(filename, size, tmpfile, sparse);
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} else if(!strcmp(fmt, "qcow2")) {
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ret = qcow2_create(filename, size, tmpfile, sparse);
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} else {
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fprintf(stderr,"Unsupport format:%s\n", fmt);
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exit(-1);
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}
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DFPRINTF("Creating file size %llu, name %s\n",(long long unsigned)size, filename);
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if (ret < 0)
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DPRINTF("Unable to create QCOW file\n");
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else
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DPRINTF("QCOW file successfully created\n");
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return 0;
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}
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