1 /* guestfish - the filesystem interactive shell
2 * Copyright (C) 2009 Red Hat Inc.
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation; either version 2 of the License, or
7 * (at your option) any later version.
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write to the Free Software
16 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
30 static int parse_size (const char *str, off_t *size_rtn);
33 do_alloc (const char *cmd, int argc, char *argv[])
39 fprintf (stderr, _("use 'alloc file size' to create an image\n"));
43 if (parse_size (argv[1], &size) == -1)
46 if (!guestfs_is_config (g)) {
47 fprintf (stderr, _("can't allocate or add disks after launching\n"));
51 fd = open (argv[0], O_WRONLY|O_CREAT|O_NOCTTY|O_TRUNC, 0666);
57 if (posix_fallocate (fd, 0, size) == -1) {
64 if (close (fd) == -1) {
70 if (guestfs_add_drive (g, argv[0]) == -1) {
79 do_sparse (const char *cmd, int argc, char *argv[])
86 fprintf (stderr, _("use 'sparse file size' to create a sparse image\n"));
90 if (parse_size (argv[1], &size) == -1)
93 if (!guestfs_is_config (g)) {
94 fprintf (stderr, _("can't allocate or add disks after launching\n"));
98 fd = open (argv[0], O_WRONLY|O_CREAT|O_NOCTTY|O_TRUNC, 0666);
104 if (lseek (fd, size-1, SEEK_SET) == (off_t) -1) {
111 if (write (fd, &c, 1) != 1) {
118 if (close (fd) == -1) {
124 if (guestfs_add_drive (g, argv[0]) == -1) {
133 parse_size (const char *str, off_t *size_rtn)
138 /* Note that the parsing here is looser than what is specified in the
139 * help, but we may tighten it up in future so beware.
141 if (sscanf (str, "%"SCNu64"%c", &size, &type) == 2) {
143 case 'k': case 'K': size *= 1024ULL; break;
144 case 'm': case 'M': size *= 1024ULL * 1024ULL; break;
145 case 'g': case 'G': size *= 1024ULL * 1024ULL * 1024ULL; break;
146 case 't': case 'T': size *= 1024ULL * 1024ULL * 1024ULL * 1024ULL; break;
147 case 'p': case 'P': size *= 1024ULL * 1024ULL * 1024ULL * 1024ULL * 1024ULL; break;
148 case 'e': case 'E': size *= 1024ULL * 1024ULL * 1024ULL * 1024ULL * 1024ULL * 1024ULL; break;
149 case 's': size *= 512; break;
151 fprintf (stderr, _("could not parse size specification '%s'\n"), str);
155 else if (sscanf (str, "%"SCNu64, &size) == 1)
158 fprintf (stderr, _("could not parse size specification '%s'\n"), str);
162 /* XXX 32 bit file offsets, if anyone uses them? GCC should give
163 * a warning here anyhow.