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authorDavid Oberhollenzer <david.oberhollenzer@sigma-star.at>2019-05-03 21:44:59 +0200
committerDavid Oberhollenzer <david.oberhollenzer@sigma-star.at>2019-05-03 21:45:46 +0200
commit9de5c93986bc6a4b33f3f50ed2a94c9aa3a33c7f (patch)
tree592a91bb99de624139de9f64d0fc4e2716889891 /unpack/unsquashfs.c
parent11163f69106c88736499ca3ec3a9972bcdcd0c26 (diff)
unsquashfs: add code to unpack the entire file system
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
Diffstat (limited to 'unpack/unsquashfs.c')
-rw-r--r--unpack/unsquashfs.c37
1 files changed, 30 insertions, 7 deletions
diff --git a/unpack/unsquashfs.c b/unpack/unsquashfs.c
index 90a7583..178def4 100644
--- a/unpack/unsquashfs.c
+++ b/unpack/unsquashfs.c
@@ -5,16 +5,18 @@ enum {
OP_NONE = 0,
OP_LS,
OP_CAT,
+ OP_UNPACK,
};
static struct option long_opts[] = {
{ "list", required_argument, NULL, 'l' },
{ "cat", required_argument, NULL, 'c' },
+ { "unpack-root", required_argument, NULL, 'u' },
{ "help", no_argument, NULL, 'h' },
{ "version", no_argument, NULL, 'V' },
};
-static const char *short_opts = "l:hV";
+static const char *short_opts = "l:c:u:hV";
static const char *help_string =
"Usage: %s [OPTIONS] <squashfs-file>\n"
@@ -22,12 +24,14 @@ static const char *help_string =
"View or extract the contents of a squashfs image.\n"
"\n"
"Possible options:\n"
-" --list, -l <path> Produce a directory listing for a given path in the\n"
-" squashfs image.\n"
-" --cat, -c <path> If the specified path is a regular file in the image,\n"
-" dump its contents to stdout.\n"
-" --help, -h Print help text and exit.\n"
-" --version, -V Print version information and exit.\n"
+" --list, -l <path> Produce a directory listing for a given path in the\n"
+" squashfs image.\n"
+" --cat, -c <path> If the specified path is a regular file in the,\n"
+" image, dump its contents to stdout.\n"
+" --unpack-root <path> Unpack the contents of the filesystem into the\n"
+" specified path\n"
+" --help, -h Print help text and exit.\n"
+" --version, -V Print version information and exit.\n"
"\n";
extern const char *__progname;
@@ -89,6 +93,7 @@ static char *get_path(char *old, const char *arg)
int main(int argc, char **argv)
{
int i, fd, status = EXIT_FAILURE, op = OP_NONE;
+ const char *unpack_root = NULL;
frag_reader_t *frag = NULL;
char *cmdpath = NULL;
sqfs_super_t super;
@@ -110,6 +115,10 @@ int main(int argc, char **argv)
op = OP_LS;
cmdpath = get_path(cmdpath, optarg);
break;
+ case 'u':
+ op = OP_UNPACK;
+ unpack_root = optarg;
+ break;
case 'h':
printf(help_string, __progname);
status = EXIT_SUCCESS;
@@ -207,6 +216,20 @@ int main(int argc, char **argv)
goto out_fs;
}
break;
+ case OP_UNPACK:
+ if (super.fragment_entry_count > 0 &&
+ super.fragment_table_start < super.bytes_used &&
+ !(super.flags & SQFS_FLAG_NO_FRAGMENTS)) {
+ frag = frag_reader_create(&super, fd, cmp);
+ if (frag == NULL)
+ goto out_fs;
+ }
+
+ if (restore_fstree(unpack_root, fs.root, cmp, super.block_size,
+ frag, fd)) {
+ goto out_fs;
+ }
+ break;
}
status = EXIT_SUCCESS;