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

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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

997ad2c64a 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>
This commit is contained in:
Eugene Rudoy 2017-11-07 08:03:36 +01:00 committed by Denys Vlasenko
parent 0a67722140
commit c6f213ade4
1 changed files with 8 additions and 7 deletions
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15
archival/unzip.c
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@ -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;