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Diffstat (limited to 'extras/volume_id/vol_id.c')
-rw-r--r--extras/volume_id/vol_id.c18
1 files changed, 13 insertions, 5 deletions
diff --git a/extras/volume_id/vol_id.c b/extras/volume_id/vol_id.c
index 0137b84fbe..19aa0bd3c2 100644
--- a/extras/volume_id/vol_id.c
+++ b/extras/volume_id/vol_id.c
@@ -117,6 +117,7 @@ int main(int argc, char *argv[])
{ "type", no_argument, NULL, 't' },
{ "export", no_argument, NULL, 'x' },
{ "skip-raid", no_argument, NULL, 's' },
+ { "size", required_argument, NULL, 'S' },
{ "probe-all", no_argument, NULL, 'a' },
{ "offset", optional_argument, NULL, 'o' },
{ "debug", no_argument, NULL, 'd' },
@@ -136,7 +137,7 @@ int main(int argc, char *argv[])
char label_safe[256];
char label_enc[256];
char uuid_enc[256];
- uint64_t size;
+ uint64_t size = 0;
int skip_raid = 0;
int probe_all = 0;
uint64_t offset = 0;
@@ -158,7 +159,7 @@ int main(int argc, char *argv[])
while (1) {
int option;
- option = getopt_long(argc, argv, "lLutxsaodh", options, NULL);
+ option = getopt_long(argc, argv, "lLutxsS:aodh", options, NULL);
if (option == -1)
break;
@@ -189,6 +190,10 @@ int main(int argc, char *argv[])
case 'a':
probe_all = 1;
break;
+ case 'S':
+ if (optarg[0] != '\0')
+ size = strtoull(optarg, NULL, 0);
+ break;
case 'o':
if (optarg[0] != '\0')
offset = strtoull(optarg, NULL, 0);
@@ -203,6 +208,7 @@ int main(int argc, char *argv[])
" --skip-raid don't probe for raid\n"
" --probe-all find possibly conflicting signatures\n"
" --offset=<bytes> probe at the given offset\n"
+ " --size=<bytes> overwrite device size\n"
" --debug print debug output to stderr\n"
" --help\n\n");
goto exit;
@@ -233,9 +239,11 @@ int main(int argc, char *argv[])
goto exit;
}
- if (ioctl(fd, BLKGETSIZE64, &size) != 0)
- size = 0;
- info(udev_ctx, "BLKGETSIZE64=%llu (%lluGB)\n", (unsigned long long)size, (unsigned long long)size >> 30);
+ if (size == 0) {
+ if (ioctl(fd, BLKGETSIZE64, &size) != 0)
+ size = 0;
+ info(udev_ctx, "BLKGETSIZE64=%llu (%lluGB)\n", (unsigned long long)size, (unsigned long long)size >> 30);
+ }
/* try to drop all privileges before reading disk content */
if (getuid() == 0) {