vol_id: add --offset option

[elogind.git] / extras / volume_id / vol_id.c

diff --git a/extras/volume_id/vol_id.c b/extras/volume_id/vol_id.c
index 38950ee85f408b6ae349a1a2924fba9a49eee431..04e85abb7f8bd02bd69a59ad09a0d112de0bfe5d 100644 (file)
--- a/extras/volume_id/vol_id.c
+++ b/extras/volume_id/vol_id.c
@@ -134,6 +134,7 @@ int main(int argc, char *argv[])
                { "export", 0, NULL, 'x' },
                { "skip-raid", 0, NULL, 's' },
                { "probe-all", 0, NULL, 'a' },
                { "export", 0, NULL, 'x' },
                { "skip-raid", 0, NULL, 's' },
                { "probe-all", 0, NULL, 'a' },

+               { "offset", 1, NULL, 'o' },

                { "help", 0, NULL, 'h' },
                {}
        };
                { "help", 0, NULL, 'h' },
                {}
        };


@@ -153,6 +154,7 @@ int main(int argc, char *argv[])
        uint64_t size;
        int skip_raid = 0;
        int probe_all = 0;
        uint64_t size;
        int skip_raid = 0;
        int probe_all = 0;

+       uint64_t offset = 0;

        const char *node;
        int fd;
        const char *label, *uuid, *type, *type_version, *usage;
        const char *node;
        int fd;
        const char *label, *uuid, *type, *type_version, *usage;


@@ -167,7 +169,7 @@ int main(int argc, char *argv[])
        while (1) {
                int option;
 
        while (1) {
                int option;
 

-               option = getopt_long(argc, argv, "lLutxsah", options, NULL);
+               option = getopt_long(argc, argv, "lLutxsaoh", options, NULL);

                if (option == -1)
                        break;
 
                if (option == -1)
                        break;
 


@@ -193,6 +195,9 @@ int main(int argc, char *argv[])
                case 'a':
                        probe_all = 1;
                        break;
                case 'a':
                        probe_all = 1;
                        break;

+               case 'o':
+                       offset = strtoull(optarg, NULL, 0);
+                       break;

                case 'h':
                        printf("Usage: vol_id [options] <device>\n"
                            " --export        export key/value pairs\n"
                case 'h':
                        printf("Usage: vol_id [options] <device>\n"
                            " --export        export key/value pairs\n"


@@ -202,6 +207,7 @@ int main(int argc, char *argv[])
                            " --uuid          filesystem uuid\n"
                            " --skip-raid     don't probe for raid\n"
                            " --probe-all     find possibly conflicting signatures\n"
                            " --uuid          filesystem uuid\n"
                            " --skip-raid     don't probe for raid\n"
                            " --probe-all     find possibly conflicting signatures\n"

+                           " --offset        skip given number of bytes of input\n"

                            " --help\n\n");
                        goto exit;
                default:
                            " --help\n\n");
                        goto exit;
                default:


@@ -249,14 +255,14 @@ int main(int argc, char *argv[])
        }
 
        if (probe_all) {
        }
 
        if (probe_all) {

-               volume_id_all_probers(all_probers, vid, 0, size, NULL);
+               volume_id_all_probers(all_probers, vid, offset, size, NULL);

                goto exit;
        }
 
        if (skip_raid)
                goto exit;
        }
 
        if (skip_raid)

-               retval = volume_id_probe_filesystem(vid, 0, size);
+               retval = volume_id_probe_filesystem(vid, offset, size);

        else
        else

-               retval = volume_id_probe_all(vid, 0, size);
+               retval = volume_id_probe_all(vid, offset, size);

        if (retval != 0) {
                fprintf(stderr, "%s: unknown volume type\n", node);
                rc = 4;
        if (retval != 0) {
                fprintf(stderr, "%s: unknown volume type\n", node);
                rc = 4;