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Diffstat (limited to 'qemu-img.c')
-rw-r--r--qemu-img.c116
1 files changed, 70 insertions, 46 deletions
diff --git a/qemu-img.c b/qemu-img.c
index 8455994c65..4dae84a182 100644
--- a/qemu-img.c
+++ b/qemu-img.c
@@ -57,8 +57,22 @@ static void format_print(void *opaque, const char *name)
printf(" %s", name);
}
+static void QEMU_NORETURN GCC_FMT_ATTR(1, 2) error_exit(const char *fmt, ...)
+{
+ va_list ap;
+
+ error_printf("qemu-img: ");
+
+ va_start(ap, fmt);
+ error_vprintf(fmt, ap);
+ va_end(ap);
+
+ error_printf("\nTry 'qemu-img --help' for more information\n");
+ exit(EXIT_FAILURE);
+}
+
/* Please keep in synch with qemu-img.texi */
-static void help(void)
+static void QEMU_NORETURN help(void)
{
const char *help_msg =
"qemu-img version " QEMU_VERSION ", Copyright (c) 2004-2008 Fabrice Bellard\n"
@@ -129,7 +143,7 @@ static void help(void)
printf("%s\nSupported formats:", help_msg);
bdrv_iterate_format(format_print, NULL);
printf("\n");
- exit(1);
+ exit(EXIT_SUCCESS);
}
static int GCC_FMT_ATTR(2, 3) qprintf(bool quiet, const char *fmt, ...)
@@ -262,7 +276,8 @@ static int print_block_option_help(const char *filename, const char *fmt)
return 0;
}
-static BlockDriverState *bdrv_new_open(const char *filename,
+static BlockDriverState *bdrv_new_open(const char *id,
+ const char *filename,
const char *fmt,
int flags,
bool require_io,
@@ -274,7 +289,7 @@ static BlockDriverState *bdrv_new_open(const char *filename,
Error *local_err = NULL;
int ret;
- bs = bdrv_new("image");
+ bs = bdrv_new(id, &error_abort);
if (fmt) {
drv = bdrv_find_format(fmt);
@@ -398,7 +413,7 @@ static int img_create(int argc, char **argv)
}
if (optind >= argc) {
- help();
+ error_exit("Expecting image file name");
}
optind++;
@@ -421,7 +436,7 @@ static int img_create(int argc, char **argv)
img_size = (uint64_t)sval;
}
if (optind != argc) {
- help();
+ error_exit("Unexpected argument: %s", argv[optind]);
}
bdrv_img_create(filename, fmt, base_filename, base_fmt,
@@ -590,7 +605,8 @@ static int img_check(int argc, char **argv)
} else if (!strcmp(optarg, "all")) {
fix = BDRV_FIX_LEAKS | BDRV_FIX_ERRORS;
} else {
- help();
+ error_exit("Unknown option value for -r "
+ "(expecting 'leaks' or 'all'): %s", optarg);
}
break;
case OPTION_OUTPUT:
@@ -602,7 +618,7 @@ static int img_check(int argc, char **argv)
}
}
if (optind != argc - 1) {
- help();
+ error_exit("Expecting one image file name");
}
filename = argv[optind++];
@@ -615,7 +631,7 @@ static int img_check(int argc, char **argv)
return 1;
}
- bs = bdrv_new_open(filename, fmt, flags, true, quiet);
+ bs = bdrv_new_open("image", filename, fmt, flags, true, quiet);
if (!bs) {
return 1;
}
@@ -713,7 +729,7 @@ static int img_commit(int argc, char **argv)
}
}
if (optind != argc - 1) {
- help();
+ error_exit("Expecting one image file name");
}
filename = argv[optind++];
@@ -724,7 +740,7 @@ static int img_commit(int argc, char **argv)
return -1;
}
- bs = bdrv_new_open(filename, fmt, flags, true, quiet);
+ bs = bdrv_new_open("image", filename, fmt, flags, true, quiet);
if (!bs) {
return 1;
}
@@ -959,7 +975,7 @@ static int img_compare(int argc, char **argv)
if (optind != argc - 2) {
- help();
+ error_exit("Expecting two image file names");
}
filename1 = argv[optind++];
filename2 = argv[optind++];
@@ -967,14 +983,14 @@ static int img_compare(int argc, char **argv)
/* Initialize before goto out */
qemu_progress_init(progress, 2.0);
- bs1 = bdrv_new_open(filename1, fmt1, BDRV_O_FLAGS, true, quiet);
+ bs1 = bdrv_new_open("image 1", filename1, fmt1, BDRV_O_FLAGS, true, quiet);
if (!bs1) {
error_report("Can't open file %s", filename1);
ret = 2;
goto out3;
}
- bs2 = bdrv_new_open(filename2, fmt2, BDRV_O_FLAGS, true, quiet);
+ bs2 = bdrv_new_open("image 2", filename2, fmt2, BDRV_O_FLAGS, true, quiet);
if (!bs2) {
error_report("Can't open file %s", filename2);
ret = 2;
@@ -1275,7 +1291,7 @@ static int img_convert(int argc, char **argv)
}
if (bs_n < 1) {
- help();
+ error_exit("Must specify image file name");
}
@@ -1292,8 +1308,11 @@ static int img_convert(int argc, char **argv)
total_sectors = 0;
for (bs_i = 0; bs_i < bs_n; bs_i++) {
- bs[bs_i] = bdrv_new_open(argv[optind + bs_i], fmt, BDRV_O_FLAGS, true,
- quiet);
+ char *id = bs_n > 1 ? g_strdup_printf("source %d", bs_i)
+ : g_strdup("source");
+ bs[bs_i] = bdrv_new_open(id, argv[optind + bs_i], fmt, BDRV_O_FLAGS,
+ true, quiet);
+ g_free(id);
if (!bs[bs_i]) {
error_report("Could not open '%s'", argv[optind + bs_i]);
ret = -1;
@@ -1416,7 +1435,7 @@ static int img_convert(int argc, char **argv)
return -1;
}
- out_bs = bdrv_new_open(out_filename, out_fmt, flags, true, quiet);
+ out_bs = bdrv_new_open("target", out_filename, out_fmt, flags, true, quiet);
if (!out_bs) {
ret = -1;
goto out;
@@ -1799,8 +1818,8 @@ static ImageInfoList *collect_image_info_list(const char *filename,
}
g_hash_table_insert(filenames, (gpointer)filename, NULL);
- bs = bdrv_new_open(filename, fmt, BDRV_O_FLAGS | BDRV_O_NO_BACKING,
- false, false);
+ bs = bdrv_new_open("image", filename, fmt,
+ BDRV_O_FLAGS | BDRV_O_NO_BACKING, false, false);
if (!bs) {
goto err;
}
@@ -1882,7 +1901,7 @@ static int img_info(int argc, char **argv)
}
}
if (optind != argc - 1) {
- help();
+ error_exit("Expecting one image file name");
}
filename = argv[optind++];
@@ -2046,10 +2065,10 @@ static int img_map(int argc, char **argv)
break;
}
}
- if (optind >= argc) {
- help();
+ if (optind != argc - 1) {
+ error_exit("Expecting one image file name");
}
- filename = argv[optind++];
+ filename = argv[optind];
if (output && !strcmp(output, "json")) {
output_format = OFORMAT_JSON;
@@ -2060,7 +2079,7 @@ static int img_map(int argc, char **argv)
return 1;
}
- bs = bdrv_new_open(filename, fmt, BDRV_O_FLAGS, true, false);
+ bs = bdrv_new_open("image", filename, fmt, BDRV_O_FLAGS, true, false);
if (!bs) {
return 1;
}
@@ -2138,7 +2157,7 @@ static int img_snapshot(int argc, char **argv)
return 0;
case 'l':
if (action) {
- help();
+ error_exit("Cannot mix '-l', '-a', '-c', '-d'");
return 0;
}
action = SNAPSHOT_LIST;
@@ -2146,7 +2165,7 @@ static int img_snapshot(int argc, char **argv)
break;
case 'a':
if (action) {
- help();
+ error_exit("Cannot mix '-l', '-a', '-c', '-d'");
return 0;
}
action = SNAPSHOT_APPLY;
@@ -2154,7 +2173,7 @@ static int img_snapshot(int argc, char **argv)
break;
case 'c':
if (action) {
- help();
+ error_exit("Cannot mix '-l', '-a', '-c', '-d'");
return 0;
}
action = SNAPSHOT_CREATE;
@@ -2162,7 +2181,7 @@ static int img_snapshot(int argc, char **argv)
break;
case 'd':
if (action) {
- help();
+ error_exit("Cannot mix '-l', '-a', '-c', '-d'");
return 0;
}
action = SNAPSHOT_DELETE;
@@ -2175,12 +2194,12 @@ static int img_snapshot(int argc, char **argv)
}
if (optind != argc - 1) {
- help();
+ error_exit("Expecting one image file name");
}
filename = argv[optind++];
/* Open the image */
- bs = bdrv_new_open(filename, NULL, bdrv_oflags, true, quiet);
+ bs = bdrv_new_open("image", filename, NULL, bdrv_oflags, true, quiet);
if (!bs) {
return 1;
}
@@ -2288,8 +2307,11 @@ static int img_rebase(int argc, char **argv)
progress = 0;
}
- if ((optind != argc - 1) || (!unsafe && !out_baseimg)) {
- help();
+ if (optind != argc - 1) {
+ error_exit("Expecting one image file name");
+ }
+ if (!unsafe && !out_baseimg) {
+ error_exit("Must specify backing file (-b) or use unsafe mode (-u)");
}
filename = argv[optind++];
@@ -2309,7 +2331,7 @@ static int img_rebase(int argc, char **argv)
* Ignore the old backing file for unsafe rebase in case we want to correct
* the reference to a renamed or moved backing file.
*/
- bs = bdrv_new_open(filename, fmt, flags, true, quiet);
+ bs = bdrv_new_open("image", filename, fmt, flags, true, quiet);
if (!bs) {
return 1;
}
@@ -2344,7 +2366,7 @@ static int img_rebase(int argc, char **argv)
} else {
char backing_name[1024];
- bs_old_backing = bdrv_new("old_backing");
+ bs_old_backing = bdrv_new("old_backing", &error_abort);
bdrv_get_backing_filename(bs, backing_name, sizeof(backing_name));
ret = bdrv_open(&bs_old_backing, backing_name, NULL, NULL, BDRV_O_FLAGS,
old_backing_drv, &local_err);
@@ -2355,7 +2377,7 @@ static int img_rebase(int argc, char **argv)
goto out;
}
if (out_baseimg[0]) {
- bs_new_backing = bdrv_new("new_backing");
+ bs_new_backing = bdrv_new("new_backing", &error_abort);
ret = bdrv_open(&bs_new_backing, out_baseimg, NULL, NULL,
BDRV_O_FLAGS, new_backing_drv, &local_err);
if (ret) {
@@ -2549,7 +2571,7 @@ static int img_resize(int argc, char **argv)
/* Remove size from argv manually so that negative numbers are not treated
* as options by getopt. */
if (argc < 3) {
- help();
+ error_exit("Not enough arguments");
return 1;
}
@@ -2576,7 +2598,7 @@ static int img_resize(int argc, char **argv)
}
}
if (optind != argc - 1) {
- help();
+ error_exit("Expecting one image file name");
}
filename = argv[optind++];
@@ -2606,7 +2628,8 @@ static int img_resize(int argc, char **argv)
n = qemu_opt_get_size(param, BLOCK_OPT_SIZE, 0);
qemu_opts_del(param);
- bs = bdrv_new_open(filename, fmt, BDRV_O_FLAGS | BDRV_O_RDWR, true, quiet);
+ bs = bdrv_new_open("image", filename, fmt, BDRV_O_FLAGS | BDRV_O_RDWR,
+ true, quiet);
if (!bs) {
ret = -1;
goto out;
@@ -2692,7 +2715,7 @@ static int img_amend(int argc, char **argv)
}
if (!options) {
- help();
+ error_exit("Must specify options (-o)");
}
filename = (optind == argc - 1) ? argv[argc - 1] : NULL;
@@ -2704,10 +2727,11 @@ static int img_amend(int argc, char **argv)
}
if (optind != argc - 1) {
- help();
+ error_exit("Expecting one image file name");
}
- bs = bdrv_new_open(filename, fmt, BDRV_O_FLAGS | BDRV_O_RDWR, true, quiet);
+ bs = bdrv_new_open("image", filename, fmt,
+ BDRV_O_FLAGS | BDRV_O_RDWR, true, quiet);
if (!bs) {
error_report("Could not open image '%s'", filename);
ret = -1;
@@ -2775,8 +2799,9 @@ int main(int argc, char **argv)
qemu_init_main_loop();
bdrv_init();
- if (argc < 2)
- help();
+ if (argc < 2) {
+ error_exit("Not enough arguments");
+ }
cmdname = argv[1];
argc--; argv++;
@@ -2788,6 +2813,5 @@ int main(int argc, char **argv)
}
/* not found */
- help();
- return 0;
+ error_exit("Command not found: %s", cmdname);
}
generated by cgit v1.2.3 (git 2.26.2) at 2024-12-25 05:46:01 +0000