[qemu.git] / qemu-img.c

/*
 * QEMU disk image utility
 *
 * Copyright (c) 2003-2008 Fabrice Bellard
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (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 "qemu-common.h"
#include "block_int.h"
#include <assert.h>

#ifdef _WIN32
#define WIN32_LEAN_AND_MEAN
#include <windows.h>
#endif

static void __attribute__((noreturn)) error(const char *fmt, ...)
{
    va_list ap;
    va_start(ap, fmt);
    fprintf(stderr, "qemu-img: ");
    vfprintf(stderr, fmt, ap);
    fprintf(stderr, "\n");
    exit(1);
    va_end(ap);
}

static void format_print(void *opaque, const char *name)
{
    printf(" %s", name);
}

static void help(void)
{
    printf("qemu-img version " QEMU_VERSION ", Copyright (c) 2004-2008 Fabrice Bellard\n"
           "usage: qemu-img command [command options]\n"
           "QEMU disk image utility\n"
           "\n"
           "Command syntax:\n"
           "  create [-e] [-6] [-b base_image] [-f fmt] filename [size]\n"
           "  commit [-f fmt] filename\n"
           "  convert [-c] [-e] [-6] [-f fmt] [-O output_fmt] filename [filename2 [...]] output_filename\n"
           "  info [-f fmt] filename\n"
           "\n"
           "Command parameters:\n"
           "  'filename' is a disk image filename\n"
           "  'base_image' is the read-only disk image which is used as base for a copy on\n"
           "    write image; the copy on write image only stores the modified data\n"
           "  'fmt' is the disk image format. It is guessed automatically in most cases\n"
           "  'size' is the disk image size in kilobytes. Optional suffixes 'M' (megabyte)\n"
           "    and 'G' (gigabyte) are supported\n"
           "  'output_filename' is the destination disk image filename\n"
           "  'output_fmt' is the destination format\n"
           "  '-c' indicates that target image must be compressed (qcow format only)\n"
           "  '-e' indicates that the target image must be encrypted (qcow format only)\n"
           "  '-6' indicates that the target image must use compatibility level 6 (vmdk format only)\n"
           );
    printf("\nSupported format:");
    bdrv_iterate_format(format_print, NULL);
    printf("\n");
    exit(1);
}

#if defined(WIN32)
/* XXX: put correct support for win32 */
static int read_password(char *buf, int buf_size)
{
    int c, i;
    printf("Password: ");
    fflush(stdout);
    i = 0;
    for(;;) {
        c = getchar();
        if (c == '\n')
            break;
        if (i < (buf_size - 1))
            buf[i++] = c;
    }
    buf[i] = '\0';
    return 0;
}

#else

#include <termios.h>

static struct termios oldtty;

static void term_exit(void)
{
    tcsetattr (0, TCSANOW, &oldtty);
}

static void term_init(void)
{
    struct termios tty;

    tcgetattr (0, &tty);
    oldtty = tty;

    tty.c_iflag &= ~(IGNBRK|BRKINT|PARMRK|ISTRIP
                          |INLCR|IGNCR|ICRNL|IXON);
    tty.c_oflag |= OPOST;
    tty.c_lflag &= ~(ECHO|ECHONL|ICANON|IEXTEN);
    tty.c_cflag &= ~(CSIZE|PARENB);
    tty.c_cflag |= CS8;
    tty.c_cc[VMIN] = 1;
    tty.c_cc[VTIME] = 0;

    tcsetattr (0, TCSANOW, &tty);

    atexit(term_exit);
}

static int read_password(char *buf, int buf_size)
{
    uint8_t ch;
    int i, ret;

    printf("password: ");
    fflush(stdout);
    term_init();
    i = 0;
    for(;;) {
        ret = read(0, &ch, 1);
        if (ret == -1) {
            if (errno == EAGAIN || errno == EINTR) {
                continue;
            } else {
                ret = -1;
                break;
            }
        } else if (ret == 0) {
            ret = -1;
            break;
        } else {
            if (ch == '\r') {
                ret = 0;
                break;
            }
            if (i < (buf_size - 1))
                buf[i++] = ch;
        }
    }
    term_exit();
    buf[i] = '\0';
    printf("\n");
    return ret;
}
#endif

static BlockDriverState *bdrv_new_open(const char *filename,
                                       const char *fmt)
{
    BlockDriverState *bs;
    BlockDriver *drv;
    char password[256];

    bs = bdrv_new("");
    if (!bs)
        error("Not enough memory");
    if (fmt) {
        drv = bdrv_find_format(fmt);
        if (!drv)
            error("Unknown file format '%s'", fmt);
    } else {
        drv = NULL;
    }
    if (bdrv_open2(bs, filename, 0, drv) < 0) {
        error("Could not open '%s'", filename);
    }
    if (bdrv_is_encrypted(bs)) {
        printf("Disk image '%s' is encrypted.\n", filename);
        if (read_password(password, sizeof(password)) < 0)
            error("No password given");
        if (bdrv_set_key(bs, password) < 0)
            error("invalid password");
    }
    return bs;
}

static int img_create(int argc, char **argv)
{
    int c, ret, flags;
    const char *fmt = "raw";
    const char *filename;
    const char *base_filename = NULL;
    uint64_t size;
    const char *p;
    BlockDriver *drv;

    flags = 0;
    for(;;) {
        c = getopt(argc, argv, "b:f:he6");
        if (c == -1)
            break;
        switch(c) {
        case 'h':
            help();
            break;
        case 'b':
            base_filename = optarg;
            break;
        case 'f':
            fmt = optarg;
            break;
        case 'e':
            flags |= BLOCK_FLAG_ENCRYPT;
            break;
        case '6':
            flags |= BLOCK_FLAG_COMPAT6;
            break;
        }
    }
    if (optind >= argc)
        help();
    filename = argv[optind++];
    size = 0;
    if (base_filename) {
        BlockDriverState *bs;
        bs = bdrv_new_open(base_filename, NULL);
        bdrv_get_geometry(bs, &size);
        size *= 512;
        bdrv_delete(bs);
    } else {
        if (optind >= argc)
            help();
        p = argv[optind];
        size = strtoul(p, (char **)&p, 0);
        if (*p == 'M') {
            size *= 1024 * 1024;
        } else if (*p == 'G') {
            size *= 1024 * 1024 * 1024;
        } else if (*p == 'k' || *p == 'K' || *p == '\0') {
            size *= 1024;
        } else {
            help();
        }
    }
    drv = bdrv_find_format(fmt);
    if (!drv)
        error("Unknown file format '%s'", fmt);
    printf("Formatting '%s', fmt=%s",
           filename, fmt);
    if (flags & BLOCK_FLAG_ENCRYPT)
        printf(", encrypted");
    if (flags & BLOCK_FLAG_COMPAT6)
        printf(", compatibility level=6");
    if (base_filename) {
        printf(", backing_file=%s",
               base_filename);
    }
    printf(", size=%" PRIu64 " kB\n", size / 1024);
    ret = bdrv_create(drv, filename, size / 512, base_filename, flags);
    if (ret < 0) {
        if (ret == -ENOTSUP) {
            error("Formatting or formatting option not supported for file format '%s'", fmt);
        } else {
            error("Error while formatting");
        }
    }
    return 0;
}

static int img_commit(int argc, char **argv)
{
    int c, ret;
    const char *filename, *fmt;
    BlockDriver *drv;
    BlockDriverState *bs;

    fmt = NULL;
    for(;;) {
        c = getopt(argc, argv, "f:h");
        if (c == -1)
            break;
        switch(c) {
        case 'h':
            help();
            break;
        case 'f':
            fmt = optarg;
            break;
        }
    }
    if (optind >= argc)
        help();
    filename = argv[optind++];

    bs = bdrv_new("");
    if (!bs)
        error("Not enough memory");
    if (fmt) {
        drv = bdrv_find_format(fmt);
        if (!drv)
            error("Unknown file format '%s'", fmt);
    } else {
        drv = NULL;
    }
    if (bdrv_open2(bs, filename, 0, drv) < 0) {
        error("Could not open '%s'", filename);
    }
    ret = bdrv_commit(bs);
    switch(ret) {
    case 0:
        printf("Image committed.\n");
        break;
    case -ENOENT:
        error("No disk inserted");
        break;
    case -EACCES:
        error("Image is read-only");
        break;
    case -ENOTSUP:
        error("Image is already committed");
        break;
    default:
        error("Error while committing image");
        break;
    }

    bdrv_delete(bs);
    return 0;
}

static int is_not_zero(const uint8_t *sector, int len)
{
    int i;
    len >>= 2;
    for(i = 0;i < len; i++) {
        if (((uint32_t *)sector)[i] != 0)
            return 1;
    }
    return 0;
}

static int is_allocated_sectors(const uint8_t *buf, int n, int *pnum)
{
    int v, i;

    if (n <= 0) {
        *pnum = 0;
        return 0;
    }
    v = is_not_zero(buf, 512);
    for(i = 1; i < n; i++) {
        buf += 512;
        if (v != is_not_zero(buf, 512))
            break;
    }
    *pnum = i;
    return v;
}

#define IO_BUF_SIZE 65536

static int img_convert(int argc, char **argv)
{
    int c, ret, n, n1, bs_n, bs_i, flags, cluster_size, cluster_sectors;
    const char *fmt, *out_fmt, *out_filename;
    BlockDriver *drv;
    BlockDriverState **bs, *out_bs;
    int64_t total_sectors, nb_sectors, sector_num, bs_offset;
    uint64_t bs_sectors;
    uint8_t buf[IO_BUF_SIZE];
    const uint8_t *buf1;
    BlockDriverInfo bdi;

    fmt = NULL;
    out_fmt = "raw";
    flags = 0;
    for(;;) {
        c = getopt(argc, argv, "f:O:hce6");
        if (c == -1)
            break;
        switch(c) {
        case 'h':
            help();
            break;
        case 'f':
            fmt = optarg;
            break;
        case 'O':
            out_fmt = optarg;
            break;
        case 'c':
            flags |= BLOCK_FLAG_COMPRESS;
            break;
        case 'e':
            flags |= BLOCK_FLAG_ENCRYPT;
            break;
        case '6':
            flags |= BLOCK_FLAG_COMPAT6;
            break;
        }
    }

    bs_n = argc - optind - 1;
    if (bs_n < 1) help();

    out_filename = argv[argc - 1];
        
    bs = calloc(bs_n, sizeof(BlockDriverState *));
    if (!bs)
        error("Out of memory");

    total_sectors = 0;
    for (bs_i = 0; bs_i < bs_n; bs_i++) {
        bs[bs_i] = bdrv_new_open(argv[optind + bs_i], fmt);
        if (!bs[bs_i])
            error("Could not open '%s'", argv[optind + bs_i]);
        bdrv_get_geometry(bs[bs_i], &bs_sectors);
        total_sectors += bs_sectors;
    }

    drv = bdrv_find_format(out_fmt);
    if (!drv)
        error("Unknown file format '%s'", out_fmt);
    if (flags & BLOCK_FLAG_COMPRESS && drv != &bdrv_qcow && drv != &bdrv_qcow2)
        error("Compression not supported for this file format");
    if (flags & BLOCK_FLAG_ENCRYPT && drv != &bdrv_qcow && drv != &bdrv_qcow2)
        error("Encryption not supported for this file format");
    if (flags & BLOCK_FLAG_COMPAT6 && drv != &bdrv_vmdk)
        error("Alternative compatibility level not supported for this file format");
    if (flags & BLOCK_FLAG_ENCRYPT && flags & BLOCK_FLAG_COMPRESS)
        error("Compression and encryption not supported at the same time");

    ret = bdrv_create(drv, out_filename, total_sectors, NULL, flags);
    if (ret < 0) {
        if (ret == -ENOTSUP) {
            error("Formatting not supported for file format '%s'", fmt);
        } else {
            error("Error while formatting '%s'", out_filename);
        }
    }

    out_bs = bdrv_new_open(out_filename, out_fmt);

    bs_i = 0;
    bs_offset = 0;
    bdrv_get_geometry(bs[0], &bs_sectors);

    if (flags & BLOCK_FLAG_COMPRESS) {
        if (bdrv_get_info(out_bs, &bdi) < 0)
            error("could not get block driver info");
        cluster_size = bdi.cluster_size;
        if (cluster_size <= 0 || cluster_size > IO_BUF_SIZE)
            error("invalid cluster size");
        cluster_sectors = cluster_size >> 9;
        sector_num = 0;
        for(;;) {
            int64_t bs_num;
            int remainder;
            uint8_t *buf2;

            nb_sectors = total_sectors - sector_num;
            if (nb_sectors <= 0)
                break;
            if (nb_sectors >= cluster_sectors)
                n = cluster_sectors;
            else
                n = nb_sectors;

            bs_num = sector_num - bs_offset;
            assert (bs_num >= 0);
            remainder = n;
            buf2 = buf;
            while (remainder > 0) {
                int nlow;
                while (bs_num == bs_sectors) {
                    bs_i++;
                    assert (bs_i < bs_n);
                    bs_offset += bs_sectors;
                    bdrv_get_geometry(bs[bs_i], &bs_sectors);
                    bs_num = 0;
                    /* printf("changing part: sector_num=%lld, "
                       "bs_i=%d, bs_offset=%lld, bs_sectors=%lld\n",
                       sector_num, bs_i, bs_offset, bs_sectors); */
                }
                assert (bs_num < bs_sectors);

                nlow = (remainder > bs_sectors - bs_num) ? bs_sectors - bs_num : remainder;

                if (bdrv_read(bs[bs_i], bs_num, buf2, nlow) < 0) 
                    error("error while reading");

                buf2 += nlow * 512;
                bs_num += nlow;

                remainder -= nlow;
            }
            assert (remainder == 0);

            if (n < cluster_sectors)
                memset(buf + n * 512, 0, cluster_size - n * 512);
            if (is_not_zero(buf, cluster_size)) {
                if (bdrv_write_compressed(out_bs, sector_num, buf,
                                          cluster_sectors) != 0)
                    error("error while compressing sector %" PRId64,
                          sector_num);
            }
            sector_num += n;
        }
        /* signal EOF to align */
        bdrv_write_compressed(out_bs, 0, NULL, 0);
    } else {
        sector_num = 0;
        for(;;) {
            nb_sectors = total_sectors - sector_num;
            if (nb_sectors <= 0)
                break;
            if (nb_sectors >= (IO_BUF_SIZE / 512))
                n = (IO_BUF_SIZE / 512);
            else
                n = nb_sectors;

            while (sector_num - bs_offset >= bs_sectors) {
                bs_i ++;
                assert (bs_i < bs_n);
                bs_offset += bs_sectors;
                bdrv_get_geometry(bs[bs_i], &bs_sectors);
                /* printf("changing part: sector_num=%lld, bs_i=%d, "
                  "bs_offset=%lld, bs_sectors=%lld\n",
                   sector_num, bs_i, bs_offset, bs_sectors); */
            }

            if (n > bs_offset + bs_sectors - sector_num)
                n = bs_offset + bs_sectors - sector_num;

            if (bdrv_read(bs[bs_i], sector_num - bs_offset, buf, n) < 0) 
                error("error while reading");
            /* NOTE: at the same time we convert, we do not write zero
               sectors to have a chance to compress the image. Ideally, we
               should add a specific call to have the info to go faster */
            buf1 = buf;
            while (n > 0) {
                if (is_allocated_sectors(buf1, n, &n1)) {
                    if (bdrv_write(out_bs, sector_num, buf1, n1) < 0)
                        error("error while writing");
                }
                sector_num += n1;
                n -= n1;
                buf1 += n1 * 512;
            }
        }
    }
    bdrv_delete(out_bs);
    for (bs_i = 0; bs_i < bs_n; bs_i++)
        bdrv_delete(bs[bs_i]);
    free(bs);
    return 0;
}

#ifdef _WIN32
static int64_t get_allocated_file_size(const char *filename)
{
    typedef DWORD (WINAPI * get_compressed_t)(const char *filename, DWORD *high);
    get_compressed_t get_compressed;
    struct _stati64 st;

    /* WinNT support GetCompressedFileSize to determine allocate size */
    get_compressed = (get_compressed_t) GetProcAddress(GetModuleHandle("kernel32"), "GetCompressedFileSizeA");
    if (get_compressed) {
    	DWORD high, low;
    	low = get_compressed(filename, &high);
    	if (low != 0xFFFFFFFFlu || GetLastError() == NO_ERROR)
	    return (((int64_t) high) << 32) + low;
    }

    if (_stati64(filename, &st) < 0)
        return -1;
    return st.st_size;
}
#else
static int64_t get_allocated_file_size(const char *filename)
{
    struct stat st;
    if (stat(filename, &st) < 0)
        return -1;
    return (int64_t)st.st_blocks * 512;
}
#endif

static void dump_snapshots(BlockDriverState *bs)
{
    QEMUSnapshotInfo *sn_tab, *sn;
    int nb_sns, i;
    char buf[256];

    nb_sns = bdrv_snapshot_list(bs, &sn_tab);
    if (nb_sns <= 0)
        return;
    printf("Snapshot list:\n");
    printf("%s\n", bdrv_snapshot_dump(buf, sizeof(buf), NULL));
    for(i = 0; i < nb_sns; i++) {
        sn = &sn_tab[i];
        printf("%s\n", bdrv_snapshot_dump(buf, sizeof(buf), sn));
    }
    qemu_free(sn_tab);
}

static int img_info(int argc, char **argv)
{
    int c;
    const char *filename, *fmt;
    BlockDriver *drv;
    BlockDriverState *bs;
    char fmt_name[128], size_buf[128], dsize_buf[128];
    uint64_t total_sectors;
    int64_t allocated_size;
    char backing_filename[1024];
    char backing_filename2[1024];
    BlockDriverInfo bdi;

    fmt = NULL;
    for(;;) {
        c = getopt(argc, argv, "f:h");
        if (c == -1)
            break;
        switch(c) {
        case 'h':
            help();
            break;
        case 'f':
            fmt = optarg;
            break;
        }
    }
    if (optind >= argc)
        help();
    filename = argv[optind++];

    bs = bdrv_new("");
    if (!bs)
        error("Not enough memory");
    if (fmt) {
        drv = bdrv_find_format(fmt);
        if (!drv)
            error("Unknown file format '%s'", fmt);
    } else {
        drv = NULL;
    }
    if (bdrv_open2(bs, filename, 0, drv) < 0) {
        error("Could not open '%s'", filename);
    }
    bdrv_get_format(bs, fmt_name, sizeof(fmt_name));
    bdrv_get_geometry(bs, &total_sectors);
    get_human_readable_size(size_buf, sizeof(size_buf), total_sectors * 512);
    allocated_size = get_allocated_file_size(filename);
    if (allocated_size < 0)
	sprintf(dsize_buf, "unavailable");
    else
        get_human_readable_size(dsize_buf, sizeof(dsize_buf),
                                allocated_size);
    printf("image: %s\n"
           "file format: %s\n"
           "virtual size: %s (%" PRId64 " bytes)\n"
           "disk size: %s\n",
           filename, fmt_name, size_buf,
           (total_sectors * 512),
           dsize_buf);
    if (bdrv_is_encrypted(bs))
        printf("encrypted: yes\n");
    if (bdrv_get_info(bs, &bdi) >= 0) {
        if (bdi.cluster_size != 0)
            printf("cluster_size: %d\n", bdi.cluster_size);
    }
    bdrv_get_backing_filename(bs, backing_filename, sizeof(backing_filename));
    if (backing_filename[0] != '\0') {
        path_combine(backing_filename2, sizeof(backing_filename2),
                     filename, backing_filename);
        printf("backing file: %s (actual path: %s)\n",
               backing_filename,
               backing_filename2);
    }
    dump_snapshots(bs);
    bdrv_delete(bs);
    return 0;
}

int main(int argc, char **argv)
{
    const char *cmd;

    bdrv_init();
    if (argc < 2)
        help();
    cmd = argv[1];
    optind++;
    if (!strcmp(cmd, "create")) {
        img_create(argc, argv);
    } else if (!strcmp(cmd, "commit")) {
        img_commit(argc, argv);
    } else if (!strcmp(cmd, "convert")) {
        img_convert(argc, argv);
    } else if (!strcmp(cmd, "info")) {
        img_info(argc, argv);
    } else {
        help();
    }
    return 0;
}
Commit	Line	Data
ea2384d3	1	/*
fb43f4dd	2	* QEMU disk image utility
5fafdf24	3	*
68d0f70e	4	* Copyright (c) 2003-2008 Fabrice Bellard
5fafdf24	5	*
ea2384d3 FB	6	* Permission is hereby granted, free of charge, to any person obtaining a copy
	7	* of this software and associated documentation files (the "Software"), to deal
	8	* in the Software without restriction, including without limitation the rights
	9	* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
	10	* copies of the Software, and to permit persons to whom the Software is
	11	* furnished to do so, subject to the following conditions:
	12	*
	13	* The above copyright notice and this permission notice shall be included in
	14	* all copies or substantial portions of the Software.
	15	*
	16	* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
	17	* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
	18	* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
	19	* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
	20	* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
	21	* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
	22	* THE SOFTWARE.
	23	*/
faf07963	24	#include "qemu-common.h"
ec36ba14	25	#include "block_int.h"
926c2d23	26	#include <assert.h>
ea2384d3	27
e8445331	28	#ifdef _WIN32
4fddf62a	29	#define WIN32_LEAN_AND_MEAN
e8445331 FB	30	#include <windows.h>
	31	#endif
	32
3f379ab1	33	static void __attribute__((noreturn)) error(const char *fmt, ...)
ea2384d3 FB	34	{
	35	va_list ap;
	36	va_start(ap, fmt);
57d1a2b6	37	fprintf(stderr, "qemu-img: ");
ea2384d3 FB	38	vfprintf(stderr, fmt, ap);
	39	fprintf(stderr, "\n");
	40	exit(1);
	41	va_end(ap);
	42	}
	43
	44	static void format_print(void opaque, const char name)
	45	{
	46	printf(" %s", name);
	47	}
	48
3f379ab1	49	static void help(void)
ea2384d3	50	{
68d0f70e	51	printf("qemu-img version " QEMU_VERSION ", Copyright (c) 2004-2008 Fabrice Bellard\n"
57d1a2b6	52	"usage: qemu-img command [command options]\n"
ea2384d3 FB	53	"QEMU disk image utility\n"
	54	"\n"
	55	"Command syntax:\n"
ec36ba14	56	" create [-e] [-6] [-b base_image] [-f fmt] filename [size]\n"
ea2384d3	57	" commit [-f fmt] filename\n"
c0be16d3	58	" convert [-c] [-e] [-6] [-f fmt] [-O output_fmt] filename [filename2 [...]] output_filename\n"
ea2384d3 FB	59	" info [-f fmt] filename\n"
	60	"\n"
	61	"Command parameters:\n"
	62	" 'filename' is a disk image filename\n"
	63	" 'base_image' is the read-only disk image which is used as base for a copy on\n"
	64	" write image; the copy on write image only stores the modified data\n"
	65	" 'fmt' is the disk image format. It is guessed automatically in most cases\n"
	66	" 'size' is the disk image size in kilobytes. Optional suffixes 'M' (megabyte)\n"
	67	" and 'G' (gigabyte) are supported\n"
	68	" 'output_filename' is the destination disk image filename\n"
	69	" 'output_fmt' is the destination format\n"
	70	" '-c' indicates that target image must be compressed (qcow format only)\n"
	71	" '-e' indicates that the target image must be encrypted (qcow format only)\n"
ec36ba14	72	" '-6' indicates that the target image must use compatibility level 6 (vmdk format only)\n"
ea2384d3 FB	73	);
	74	printf("\nSupported format:");
	75	bdrv_iterate_format(format_print, NULL);
	76	printf("\n");
	77	exit(1);
	78	}
	79
ea2384d3 FB	80	#if defined(WIN32)
	81	/* XXX: put correct support for win32 */
	82	static int read_password(char *buf, int buf_size)
	83	{
	84	int c, i;
	85	printf("Password: ");
	86	fflush(stdout);
	87	i = 0;
	88	for(;;) {
	89	c = getchar();
	90	if (c == '\n')
	91	break;
	92	if (i < (buf_size - 1))
	93	buf[i++] = c;
	94	}
	95	buf[i] = '\0';
	96	return 0;
	97	}
	98
	99	#else
	100
	101	#include <termios.h>
	102
	103	static struct termios oldtty;
	104
	105	static void term_exit(void)
	106	{
	107	tcsetattr (0, TCSANOW, &oldtty);
	108	}
	109
	110	static void term_init(void)
	111	{
	112	struct termios tty;
	113
	114	tcgetattr (0, &tty);
	115	oldtty = tty;
	116
	117	tty.c_iflag &= ~(IGNBRK\|BRKINT\|PARMRK\|ISTRIP
	118	\|INLCR\|IGNCR\|ICRNL\|IXON);
	119	tty.c_oflag \|= OPOST;
	120	tty.c_lflag &= ~(ECHO\|ECHONL\|ICANON\|IEXTEN);
	121	tty.c_cflag &= ~(CSIZE\|PARENB);
	122	tty.c_cflag \|= CS8;
	123	tty.c_cc[VMIN] = 1;
	124	tty.c_cc[VTIME] = 0;
3b46e624	125
ea2384d3 FB	126	tcsetattr (0, TCSANOW, &tty);
	127
	128	atexit(term_exit);
	129	}
	130
3f379ab1	131	static int read_password(char *buf, int buf_size)
ea2384d3 FB	132	{
	133	uint8_t ch;
	134	int i, ret;
	135
	136	printf("password: ");
	137	fflush(stdout);
	138	term_init();
	139	i = 0;
	140	for(;;) {
	141	ret = read(0, &ch, 1);
	142	if (ret == -1) {
	143	if (errno == EAGAIN \|\| errno == EINTR) {
	144	continue;
	145	} else {
	146	ret = -1;
	147	break;
	148	}
	149	} else if (ret == 0) {
	150	ret = -1;
	151	break;
	152	} else {
	153	if (ch == '\r') {
	154	ret = 0;
	155	break;
	156	}
	157	if (i < (buf_size - 1))
	158	buf[i++] = ch;
	159	}
	160	}
	161	term_exit();
	162	buf[i] = '\0';
	163	printf("\n");
	164	return ret;
	165	}
	166	#endif
	167
75c23805 FB	168	static BlockDriverState bdrv_new_open(const char filename,
	169	const char *fmt)
	170	{
	171	BlockDriverState *bs;
	172	BlockDriver *drv;
	173	char password[256];
	174
	175	bs = bdrv_new("");
	176	if (!bs)
	177	error("Not enough memory");
	178	if (fmt) {
	179	drv = bdrv_find_format(fmt);
	180	if (!drv)
	181	error("Unknown file format '%s'", fmt);
	182	} else {
	183	drv = NULL;
	184	}
	185	if (bdrv_open2(bs, filename, 0, drv) < 0) {
	186	error("Could not open '%s'", filename);
	187	}
	188	if (bdrv_is_encrypted(bs)) {
	189	printf("Disk image '%s' is encrypted.\n", filename);
	190	if (read_password(password, sizeof(password)) < 0)
	191	error("No password given");
	192	if (bdrv_set_key(bs, password) < 0)
	193	error("invalid password");
	194	}
	195	return bs;
	196	}
	197
ea2384d3 FB	198	static int img_create(int argc, char **argv)
ea2384d3 FB	199	{
ec36ba14	200	int c, ret, flags;
ea2384d3 FB	201	const char *fmt = "raw";
	202	const char *filename;
	203	const char *base_filename = NULL;
96b8f136	204	uint64_t size;
ea2384d3 FB	205	const char *p;
ea2384d3 FB	206	BlockDriver *drv;
3b46e624	207
ec36ba14	208	flags = 0;
ea2384d3	209	for(;;) {
ec36ba14	210	c = getopt(argc, argv, "b:f:he6");
ea2384d3 FB	211	if (c == -1)
	212	break;
	213	switch(c) {
	214	case 'h':
	215	help();
	216	break;
	217	case 'b':
	218	base_filename = optarg;
	219	break;
	220	case 'f':
	221	fmt = optarg;
	222	break;
	223	case 'e':
ec36ba14	224	flags \|= BLOCK_FLAG_ENCRYPT;
ea2384d3	225	break;
d8871c5a	226	case '6':
ec36ba14	227	flags \|= BLOCK_FLAG_COMPAT6;
d8871c5a	228	break;
ea2384d3 FB	229	}
ea2384d3 FB	230	}
5fafdf24	231	if (optind >= argc)
ea2384d3 FB	232	help();
	233	filename = argv[optind++];
	234	size = 0;
75c23805 FB	235	if (base_filename) {
	236	BlockDriverState *bs;
	237	bs = bdrv_new_open(base_filename, NULL);
	238	bdrv_get_geometry(bs, &size);
	239	size *= 512;
	240	bdrv_delete(bs);
	241	} else {
ea2384d3 FB	242	if (optind >= argc)
	243	help();
	244	p = argv[optind];
	245	size = strtoul(p, (char **)&p, 0);
	246	if (*p == 'M') {
	247	size = 1024 1024;
	248	} else if (*p == 'G') {
	249	size = 1024 1024 * 1024;
	250	} else if (p == 'k' \|\| p == 'K' \|\| *p == '\0') {
	251	size *= 1024;
	252	} else {
	253	help();
	254	}
	255	}
	256	drv = bdrv_find_format(fmt);
	257	if (!drv)
	258	error("Unknown file format '%s'", fmt);
0cfec834	259	printf("Formatting '%s', fmt=%s",
ea2384d3	260	filename, fmt);
ec36ba14	261	if (flags & BLOCK_FLAG_ENCRYPT)
ea2384d3	262	printf(", encrypted");
ec36ba14 TS	263	if (flags & BLOCK_FLAG_COMPAT6)
ec36ba14 TS	264	printf(", compatibility level=6");
75c23805 FB	265	if (base_filename) {
75c23805 FB	266	printf(", backing_file=%s",
ea2384d3	267	base_filename);
75c23805	268	}
96b8f136	269	printf(", size=%" PRIu64 " kB\n", size / 1024);
ec36ba14	270	ret = bdrv_create(drv, filename, size / 512, base_filename, flags);
ea2384d3 FB	271	if (ret < 0) {
ea2384d3 FB	272	if (ret == -ENOTSUP) {
3c56521b	273	error("Formatting or formatting option not supported for file format '%s'", fmt);
ea2384d3 FB	274	} else {
	275	error("Error while formatting");
	276	}
	277	}
	278	return 0;
	279	}
	280
	281	static int img_commit(int argc, char **argv)
	282	{
	283	int c, ret;
	284	const char filename, fmt;
	285	BlockDriver *drv;
	286	BlockDriverState *bs;
	287
	288	fmt = NULL;
	289	for(;;) {
	290	c = getopt(argc, argv, "f:h");
	291	if (c == -1)
	292	break;
	293	switch(c) {
	294	case 'h':
	295	help();
	296	break;
	297	case 'f':
	298	fmt = optarg;
	299	break;
	300	}
	301	}
5fafdf24	302	if (optind >= argc)
ea2384d3 FB	303	help();
	304	filename = argv[optind++];
	305
	306	bs = bdrv_new("");
	307	if (!bs)
	308	error("Not enough memory");
	309	if (fmt) {
	310	drv = bdrv_find_format(fmt);
	311	if (!drv)
	312	error("Unknown file format '%s'", fmt);
	313	} else {
	314	drv = NULL;
	315	}
	316	if (bdrv_open2(bs, filename, 0, drv) < 0) {
	317	error("Could not open '%s'", filename);
	318	}
	319	ret = bdrv_commit(bs);
	320	switch(ret) {
	321	case 0:
	322	printf("Image committed.\n");
	323	break;
	324	case -ENOENT:
	325	error("No disk inserted");
	326	break;
	327	case -EACCES:
	328	error("Image is read-only");
	329	break;
	330	case -ENOTSUP:
	331	error("Image is already committed");
	332	break;
	333	default:
	334	error("Error while committing image");
	335	break;
	336	}
	337
	338	bdrv_delete(bs);
	339	return 0;
	340	}
	341
	342	static int is_not_zero(const uint8_t *sector, int len)
	343	{
	344	int i;
	345	len >>= 2;
	346	for(i = 0;i < len; i++) {
	347	if (((uint32_t *)sector)[i] != 0)
	348	return 1;
	349	}
	350	return 0;
	351	}
	352
	353	static int is_allocated_sectors(const uint8_t buf, int n, int pnum)
	354	{
	355	int v, i;
	356
	357	if (n <= 0) {
	358	*pnum = 0;
	359	return 0;
	360	}
	361	v = is_not_zero(buf, 512);
	362	for(i = 1; i < n; i++) {
	363	buf += 512;
	364	if (v != is_not_zero(buf, 512))
	365	break;
	366	}
367	*pnum = i;
368	return v;
369	}
370
ea2384d3 FB	371	#define IO_BUF_SIZE 65536
	372
	373	static int img_convert(int argc, char **argv)
	374	{
926c2d23 AZ	375	int c, ret, n, n1, bs_n, bs_i, flags, cluster_size, cluster_sectors;
926c2d23 AZ	376	const char fmt, out_fmt, *out_filename;
ea2384d3	377	BlockDriver *drv;
926c2d23	378	BlockDriverState *bs, out_bs;
96b8f136 TS	379	int64_t total_sectors, nb_sectors, sector_num, bs_offset;
96b8f136 TS	380	uint64_t bs_sectors;
ea2384d3 FB	381	uint8_t buf[IO_BUF_SIZE];
ea2384d3 FB	382	const uint8_t *buf1;
faea38e7	383	BlockDriverInfo bdi;
ea2384d3 FB	384
	385	fmt = NULL;
	386	out_fmt = "raw";
ec36ba14	387	flags = 0;
ea2384d3	388	for(;;) {
ec36ba14	389	c = getopt(argc, argv, "f:O:hce6");
ea2384d3 FB	390	if (c == -1)
	391	break;
	392	switch(c) {
	393	case 'h':
	394	help();
	395	break;
	396	case 'f':
	397	fmt = optarg;
	398	break;
	399	case 'O':
	400	out_fmt = optarg;
	401	break;
	402	case 'c':
ec36ba14	403	flags \|= BLOCK_FLAG_COMPRESS;
ea2384d3 FB	404	break;
ea2384d3 FB	405	case 'e':
ec36ba14 TS	406	flags \|= BLOCK_FLAG_ENCRYPT;
	407	break;
	408	case '6':
	409	flags \|= BLOCK_FLAG_COMPAT6;
ea2384d3 FB	410	break;
	411	}
	412	}
3b46e624	413
926c2d23 AZ	414	bs_n = argc - optind - 1;
	415	if (bs_n < 1) help();
	416
	417	out_filename = argv[argc - 1];
	418
	419	bs = calloc(bs_n, sizeof(BlockDriverState *));
	420	if (!bs)
	421	error("Out of memory");
	422
	423	total_sectors = 0;
	424	for (bs_i = 0; bs_i < bs_n; bs_i++) {
	425	bs[bs_i] = bdrv_new_open(argv[optind + bs_i], fmt);
	426	if (!bs[bs_i])
	427	error("Could not open '%s'", argv[optind + bs_i]);
	428	bdrv_get_geometry(bs[bs_i], &bs_sectors);
	429	total_sectors += bs_sectors;
	430	}
ea2384d3 FB	431
	432	drv = bdrv_find_format(out_fmt);
	433	if (!drv)
d34dda5e	434	error("Unknown file format '%s'", out_fmt);
ec36ba14	435	if (flags & BLOCK_FLAG_COMPRESS && drv != &bdrv_qcow && drv != &bdrv_qcow2)
ea2384d3	436	error("Compression not supported for this file format");
ec36ba14	437	if (flags & BLOCK_FLAG_ENCRYPT && drv != &bdrv_qcow && drv != &bdrv_qcow2)
ea2384d3	438	error("Encryption not supported for this file format");
d8871c5a	439	if (flags & BLOCK_FLAG_COMPAT6 && drv != &bdrv_vmdk)
ec36ba14 TS	440	error("Alternative compatibility level not supported for this file format");
ec36ba14 TS	441	if (flags & BLOCK_FLAG_ENCRYPT && flags & BLOCK_FLAG_COMPRESS)
ea2384d3	442	error("Compression and encryption not supported at the same time");
926c2d23	443
ec36ba14	444	ret = bdrv_create(drv, out_filename, total_sectors, NULL, flags);
ea2384d3 FB	445	if (ret < 0) {
ea2384d3 FB	446	if (ret == -ENOTSUP) {
3c56521b	447	error("Formatting not supported for file format '%s'", fmt);
ea2384d3 FB	448	} else {
	449	error("Error while formatting '%s'", out_filename);
	450	}
	451	}
3b46e624	452
ea2384d3 FB	453	out_bs = bdrv_new_open(out_filename, out_fmt);
ea2384d3 FB	454
926c2d23 AZ	455	bs_i = 0;
	456	bs_offset = 0;
	457	bdrv_get_geometry(bs[0], &bs_sectors);
	458
	459	if (flags & BLOCK_FLAG_COMPRESS) {
faea38e7 FB	460	if (bdrv_get_info(out_bs, &bdi) < 0)
	461	error("could not get block driver info");
	462	cluster_size = bdi.cluster_size;
ea2384d3 FB	463	if (cluster_size <= 0 \|\| cluster_size > IO_BUF_SIZE)
	464	error("invalid cluster size");
	465	cluster_sectors = cluster_size >> 9;
	466	sector_num = 0;
	467	for(;;) {
926c2d23 AZ	468	int64_t bs_num;
	469	int remainder;
	470	uint8_t *buf2;
	471
ea2384d3 FB	472	nb_sectors = total_sectors - sector_num;
	473	if (nb_sectors <= 0)
	474	break;
	475	if (nb_sectors >= cluster_sectors)
	476	n = cluster_sectors;
	477	else
	478	n = nb_sectors;
926c2d23 AZ	479
	480	bs_num = sector_num - bs_offset;
	481	assert (bs_num >= 0);
	482	remainder = n;
	483	buf2 = buf;
	484	while (remainder > 0) {
	485	int nlow;
	486	while (bs_num == bs_sectors) {
	487	bs_i++;
	488	assert (bs_i < bs_n);
	489	bs_offset += bs_sectors;
	490	bdrv_get_geometry(bs[bs_i], &bs_sectors);
	491	bs_num = 0;
	492	/* printf("changing part: sector_num=%lld, "
	493	"bs_i=%d, bs_offset=%lld, bs_sectors=%lld\n",
	494	sector_num, bs_i, bs_offset, bs_sectors); */
	495	}
	496	assert (bs_num < bs_sectors);
	497
	498	nlow = (remainder > bs_sectors - bs_num) ? bs_sectors - bs_num : remainder;
	499
	500	if (bdrv_read(bs[bs_i], bs_num, buf2, nlow) < 0)
	501	error("error while reading");
	502
	503	buf2 += nlow * 512;
	504	bs_num += nlow;
	505
	506	remainder -= nlow;
	507	}
	508	assert (remainder == 0);
	509
ea2384d3 FB	510	if (n < cluster_sectors)
	511	memset(buf + n * 512, 0, cluster_size - n * 512);
	512	if (is_not_zero(buf, cluster_size)) {
5fafdf24	513	if (bdrv_write_compressed(out_bs, sector_num, buf,
faea38e7	514	cluster_sectors) != 0)
ec3757de FB	515	error("error while compressing sector %" PRId64,
ec3757de FB	516	sector_num);
ea2384d3 FB	517	}
	518	sector_num += n;
	519	}
faea38e7 FB	520	/* signal EOF to align */
faea38e7 FB	521	bdrv_write_compressed(out_bs, 0, NULL, 0);
ea2384d3 FB	522	} else {
	523	sector_num = 0;
	524	for(;;) {
	525	nb_sectors = total_sectors - sector_num;
	526	if (nb_sectors <= 0)
	527	break;
	528	if (nb_sectors >= (IO_BUF_SIZE / 512))
	529	n = (IO_BUF_SIZE / 512);
	530	else
	531	n = nb_sectors;
926c2d23 AZ	532
	533	while (sector_num - bs_offset >= bs_sectors) {
	534	bs_i ++;
	535	assert (bs_i < bs_n);
	536	bs_offset += bs_sectors;
	537	bdrv_get_geometry(bs[bs_i], &bs_sectors);
	538	/* printf("changing part: sector_num=%lld, bs_i=%d, "
	539	"bs_offset=%lld, bs_sectors=%lld\n",
	540	sector_num, bs_i, bs_offset, bs_sectors); */
	541	}
	542
	543	if (n > bs_offset + bs_sectors - sector_num)
	544	n = bs_offset + bs_sectors - sector_num;
	545
	546	if (bdrv_read(bs[bs_i], sector_num - bs_offset, buf, n) < 0)
ea2384d3 FB	547	error("error while reading");
	548	/* NOTE: at the same time we convert, we do not write zero
	549	sectors to have a chance to compress the image. Ideally, we
	550	should add a specific call to have the info to go faster */
	551	buf1 = buf;
	552	while (n > 0) {
	553	if (is_allocated_sectors(buf1, n, &n1)) {
5fafdf24	554	if (bdrv_write(out_bs, sector_num, buf1, n1) < 0)
ea2384d3 FB	555	error("error while writing");
	556	}
	557	sector_num += n1;
	558	n -= n1;
	559	buf1 += n1 * 512;
	560	}
	561	}
	562	}
	563	bdrv_delete(out_bs);
926c2d23 AZ	564	for (bs_i = 0; bs_i < bs_n; bs_i++)
	565	bdrv_delete(bs[bs_i]);
	566	free(bs);
ea2384d3 FB	567	return 0;
	568	}
	569
57d1a2b6 FB	570	#ifdef _WIN32
	571	static int64_t get_allocated_file_size(const char *filename)
	572	{
e8445331 FB	573	typedef DWORD (WINAPI * get_compressed_t)(const char filename, DWORD high);
e8445331 FB	574	get_compressed_t get_compressed;
57d1a2b6	575	struct _stati64 st;
e8445331 FB	576
	577	/* WinNT support GetCompressedFileSize to determine allocate size */
	578	get_compressed = (get_compressed_t) GetProcAddress(GetModuleHandle("kernel32"), "GetCompressedFileSizeA");
	579	if (get_compressed) {
	580	DWORD high, low;
	581	low = get_compressed(filename, &high);
	582	if (low != 0xFFFFFFFFlu \|\| GetLastError() == NO_ERROR)
	583	return (((int64_t) high) << 32) + low;
	584	}
	585
5fafdf24	586	if (_stati64(filename, &st) < 0)
57d1a2b6 FB	587	return -1;
	588	return st.st_size;
	589	}
	590	#else
	591	static int64_t get_allocated_file_size(const char *filename)
	592	{
	593	struct stat st;
5fafdf24	594	if (stat(filename, &st) < 0)
57d1a2b6 FB	595	return -1;
	596	return (int64_t)st.st_blocks * 512;
	597	}
	598	#endif
	599
faea38e7 FB	600	static void dump_snapshots(BlockDriverState *bs)
	601	{
	602	QEMUSnapshotInfo sn_tab, sn;
	603	int nb_sns, i;
	604	char buf[256];
	605
	606	nb_sns = bdrv_snapshot_list(bs, &sn_tab);
	607	if (nb_sns <= 0)
	608	return;
	609	printf("Snapshot list:\n");
	610	printf("%s\n", bdrv_snapshot_dump(buf, sizeof(buf), NULL));
	611	for(i = 0; i < nb_sns; i++) {
	612	sn = &sn_tab[i];
	613	printf("%s\n", bdrv_snapshot_dump(buf, sizeof(buf), sn));
	614	}
	615	qemu_free(sn_tab);
	616	}
	617
ea2384d3 FB	618	static int img_info(int argc, char **argv)
	619	{
	620	int c;
	621	const char filename, fmt;
	622	BlockDriver *drv;
	623	BlockDriverState *bs;
	624	char fmt_name[128], size_buf[128], dsize_buf[128];
96b8f136 TS	625	uint64_t total_sectors;
96b8f136 TS	626	int64_t allocated_size;
93b6b2a3 FB	627	char backing_filename[1024];
93b6b2a3 FB	628	char backing_filename2[1024];
faea38e7	629	BlockDriverInfo bdi;
ea2384d3 FB	630
	631	fmt = NULL;
	632	for(;;) {
	633	c = getopt(argc, argv, "f:h");
	634	if (c == -1)
	635	break;
	636	switch(c) {
	637	case 'h':
	638	help();
	639	break;
	640	case 'f':
	641	fmt = optarg;
	642	break;
	643	}
	644	}
5fafdf24	645	if (optind >= argc)
ea2384d3 FB	646	help();
	647	filename = argv[optind++];
	648
	649	bs = bdrv_new("");
	650	if (!bs)
	651	error("Not enough memory");
	652	if (fmt) {
	653	drv = bdrv_find_format(fmt);
	654	if (!drv)
	655	error("Unknown file format '%s'", fmt);
	656	} else {
	657	drv = NULL;
	658	}
	659	if (bdrv_open2(bs, filename, 0, drv) < 0) {
	660	error("Could not open '%s'", filename);
	661	}
	662	bdrv_get_format(bs, fmt_name, sizeof(fmt_name));
	663	bdrv_get_geometry(bs, &total_sectors);
	664	get_human_readable_size(size_buf, sizeof(size_buf), total_sectors * 512);
57d1a2b6 FB	665	allocated_size = get_allocated_file_size(filename);
57d1a2b6 FB	666	if (allocated_size < 0)
de167e41 FB	667	sprintf(dsize_buf, "unavailable");
de167e41 FB	668	else
5fafdf24	669	get_human_readable_size(dsize_buf, sizeof(dsize_buf),
de167e41	670	allocated_size);
ea2384d3 FB	671	printf("image: %s\n"
ea2384d3 FB	672	"file format: %s\n"
ec3757de	673	"virtual size: %s (%" PRId64 " bytes)\n"
ea2384d3	674	"disk size: %s\n",
5fafdf24	675	filename, fmt_name, size_buf,
ec3757de	676	(total_sectors * 512),
ea2384d3 FB	677	dsize_buf);
	678	if (bdrv_is_encrypted(bs))
	679	printf("encrypted: yes\n");
faea38e7	680	if (bdrv_get_info(bs, &bdi) >= 0) {
5fafdf24	681	if (bdi.cluster_size != 0)
faea38e7 FB	682	printf("cluster_size: %d\n", bdi.cluster_size);
faea38e7 FB	683	}
93b6b2a3	684	bdrv_get_backing_filename(bs, backing_filename, sizeof(backing_filename));
faea38e7	685	if (backing_filename[0] != '\0') {
93b6b2a3 FB	686	path_combine(backing_filename2, sizeof(backing_filename2),
93b6b2a3 FB	687	filename, backing_filename);
5fafdf24	688	printf("backing file: %s (actual path: %s)\n",
93b6b2a3 FB	689	backing_filename,
93b6b2a3 FB	690	backing_filename2);
faea38e7 FB	691	}
faea38e7 FB	692	dump_snapshots(bs);
ea2384d3 FB	693	bdrv_delete(bs);
	694	return 0;
	695	}
	696
	697	int main(int argc, char **argv)
	698	{
	699	const char *cmd;
	700
	701	bdrv_init();
	702	if (argc < 2)
	703	help();
	704	cmd = argv[1];
e3888186	705	optind++;
ea2384d3 FB	706	if (!strcmp(cmd, "create")) {
	707	img_create(argc, argv);
	708	} else if (!strcmp(cmd, "commit")) {
	709	img_commit(argc, argv);
	710	} else if (!strcmp(cmd, "convert")) {
	711	img_convert(argc, argv);
	712	} else if (!strcmp(cmd, "info")) {
	713	img_info(argc, argv);
	714	} else {
	715	help();
	716	}
	717	return 0;
	718	}