unzip: fix content listing and filtering when -j is used

Original Info-ZIP's unzip uses unstripped filenames
while doing content listing and filtering, i.e.
 - in content listing mode -j is ignored completely
 - filtering is applied to non-stripped names, -j
   takes effect first while extracting the files

997ad2c64abbe931dffa3598b015c5de04e515cf strips path
components a little bit too early resulting in behavior
deviations.

Fix it by doing stripping after listing/filtering.

p.s. Info-ZIP's unzip behavior is the same as
     that of tar in --strip-components=NUM mode

Signed-off-by: Eugene Rudoy <gene.devel@gmail.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

1 files changed, 8 insertions, 7 deletions

diff --git a/archival/unzip.c b/archival/unzip.c
index 604166063..1ef4406d6 100644
--- a/archival/unzip.c
+++ b/archival/unzip.c
@@ -805,13 +805,6 @@ int unzip_main(int argc, char **argv)
                 /* Guard against "/abspath", "/../" and similar attacks */
                 overlapping_strcpy(dst_fn, strip_unsafe_prefix(dst_fn));
 
-                if (opts & OPT_j) /* Strip paths? */
-                        overlapping_strcpy(dst_fn, bb_basename(dst_fn));
-
-                /* Did this strip everything ("DIR/" case)? Then skip */
-                if (!dst_fn[0])
-                        goto skip_cmpsize;
-
                 /* Filter zip entries */
                 if (find_list_entry(zreject, dst_fn)
                  || (zaccept && !find_list_entry(zaccept, dst_fn))
@@ -876,6 +869,14 @@ int unzip_main(int argc, char **argv)
                         /* Extracting to STDOUT */
                         goto do_extract;
                 }
+
+                /* Strip paths (after -l: unzip -lj a.zip lists full names) */
+                if (opts & OPT_j)
+                        overlapping_strcpy(dst_fn, bb_basename(dst_fn));
+                /* Did this strip everything ("DIR/" case)? Then skip */
+                if (!dst_fn[0])
+                        goto skip_cmpsize;
+
                 if (last_char_is(dst_fn, '/')) {
                         int mode;