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-rw-r--r--archival/cpio.c2
-rw-r--r--archival/libarchive/data_extract_all.c16
-rw-r--r--archival/libarchive/get_header_ar.c2
-rw-r--r--archival/libarchive/unsafe_symlink_target.c21
-rw-r--r--archival/tar.c2
-rw-r--r--archival/unzip.c7
-rw-r--r--include/bb_archive.h11
-rwxr-xr-xtestsuite/tar.tests16
8 files changed, 47 insertions, 30 deletions
diff --git a/archival/cpio.c b/archival/cpio.c
index 308ec1b..2216671 100644
--- a/archival/cpio.c
+++ b/archival/cpio.c
@@ -508,7 +508,7 @@ int cpio_main(int argc UNUSED_PARAM, char **argv)
while (get_header_cpio(archive_handle) == EXIT_SUCCESS)
continue;
- create_symlinks_from_list(archive_handle->symlink_placeholders);
+ create_links_from_list(archive_handle->link_placeholders);
if (archive_handle->cpio__blocks != (off_t)-1
&& !(opt & OPT_QUIET)
diff --git a/archival/libarchive/data_extract_all.c b/archival/libarchive/data_extract_all.c
index 8fa69ff..4c95db4 100644
--- a/archival/libarchive/data_extract_all.c
+++ b/archival/libarchive/data_extract_all.c
@@ -122,13 +122,10 @@ void FAST_FUNC data_extract_all(archive_handle_t *archive_handle)
/* Handle hard links separately */
if (hard_link) {
- res = link(hard_link, dst_name);
- if (res != 0) {
- /* shared message */
- bb_perror_msg("can't create %slink '%s' to '%s'",
- "hard", dst_name, hard_link
- );
- }
+ create_or_remember_link(&archive_handle->link_placeholders,
+ hard_link,
+ dst_name,
+ 1);
/* Hardlinks have no separate mode/ownership, skip chown/chmod */
goto ret;
}
@@ -195,9 +192,10 @@ void FAST_FUNC data_extract_all(archive_handle_t *archive_handle)
*
* Untarring bug.tar would otherwise place evil.py in '/tmp'.
*/
- create_or_remember_symlink(&archive_handle->symlink_placeholders,
+ create_or_remember_link(&archive_handle->link_placeholders,
file_header->link_target,
- dst_name);
+ dst_name,
+ 0);
break;
case S_IFSOCK:
case S_IFBLK:
diff --git a/archival/libarchive/get_header_ar.c b/archival/libarchive/get_header_ar.c
index adcde46..7ce9c61 100644
--- a/archival/libarchive/get_header_ar.c
+++ b/archival/libarchive/get_header_ar.c
@@ -126,7 +126,7 @@ char FAST_FUNC get_header_ar(archive_handle_t *archive_handle)
struct archive_handle_t *sa = archive_handle->dpkg__sub_archive;
while (archive_handle->dpkg__action_data_subarchive(sa) == EXIT_SUCCESS)
continue;
- create_symlinks_from_list(sa->symlink_placeholders);
+ create_links_from_list(sa->link_placeholders);
} else
#endif
archive_handle->action_data(archive_handle);
diff --git a/archival/libarchive/unsafe_symlink_target.c b/archival/libarchive/unsafe_symlink_target.c
index 8dcafea..f8dc803 100644
--- a/archival/libarchive/unsafe_symlink_target.c
+++ b/archival/libarchive/unsafe_symlink_target.c
@@ -5,13 +5,14 @@
#include "libbb.h"
#include "bb_archive.h"
-void FAST_FUNC create_or_remember_symlink(llist_t **symlink_placeholders,
+void FAST_FUNC create_or_remember_link(llist_t **link_placeholders,
const char *target,
- const char *linkname)
+ const char *linkname,
+ int hard_link)
{
- if (target[0] == '/' || strstr(target, "..")) {
- llist_add_to(symlink_placeholders,
- xasprintf("%s%c%s", linkname, '\0', target)
+ if (hard_link || target[0] == '/' || strstr(target, "..")) {
+ llist_add_to_end(link_placeholders,
+ xasprintf("%c%s%c%s", hard_link, linkname, '\0', target)
);
return;
}
@@ -23,17 +24,17 @@ void FAST_FUNC create_or_remember_symlink(llist_t **symlink_placeholders,
}
}
-void FAST_FUNC create_symlinks_from_list(llist_t *list)
+void FAST_FUNC create_links_from_list(llist_t *list)
{
while (list) {
char *target;
- target = list->data + strlen(list->data) + 1;
- if (symlink(target, list->data)) {
+ target = list->data + 1 + strlen(list->data + 1) + 1;
+ if ((*list->data ? link : symlink) (target, list->data + 1)) {
/* shared message */
bb_error_msg_and_die("can't create %slink '%s' to '%s'",
- "sym",
- list->data, target
+ *list->data ? "hard" : "sym",
+ list->data + 1, target
);
}
list = list->link;
diff --git a/archival/tar.c b/archival/tar.c
index a8b888f..ae1ccc7 100644
--- a/archival/tar.c
+++ b/archival/tar.c
@@ -1244,7 +1244,7 @@ int tar_main(int argc UNUSED_PARAM, char **argv)
while (get_header_tar(tar_handle) == EXIT_SUCCESS)
bb_got_signal = EXIT_SUCCESS; /* saw at least one header, good */
- create_symlinks_from_list(tar_handle->symlink_placeholders);
+ create_links_from_list(tar_handle->link_placeholders);
/* Check that every file that should have been extracted was */
while (tar_handle->accept) {
diff --git a/archival/unzip.c b/archival/unzip.c
index 0d00d8d..96b7ab6 100644
--- a/archival/unzip.c
+++ b/archival/unzip.c
@@ -372,9 +372,10 @@ static void unzip_extract_symlink(llist_t **symlink_placeholders,
target[xstate.mem_output_size] = '\0';
#endif
}
- create_or_remember_symlink(symlink_placeholders,
+ create_or_remember_link(symlink_placeholders,
target,
- dst_fn);
+ dst_fn,
+ 0);
free(target);
}
#endif
@@ -990,7 +991,7 @@ int unzip_main(int argc, char **argv)
}
#if ENABLE_FEATURE_UNZIP_CDF
- create_symlinks_from_list(symlink_placeholders);
+ create_links_from_list(symlink_placeholders);
#endif
if ((opts & OPT_l) && quiet <= 1) {
diff --git a/include/bb_archive.h b/include/bb_archive.h
index 0252488..2ee30f7 100644
--- a/include/bb_archive.h
+++ b/include/bb_archive.h
@@ -64,8 +64,8 @@ typedef struct archive_handle_t {
/* Currently processed file's header */
file_header_t *file_header;
- /* List of symlink placeholders */
- llist_t *symlink_placeholders;
+ /* List of link placeholders */
+ llist_t *link_placeholders;
/* Process the header component, e.g. tar -t */
void FAST_FUNC (*action_header)(const file_header_t *);
@@ -203,10 +203,11 @@ void seek_by_jump(int fd, off_t amount) FAST_FUNC;
void seek_by_read(int fd, off_t amount) FAST_FUNC;
const char *strip_unsafe_prefix(const char *str) FAST_FUNC;
-void create_or_remember_symlink(llist_t **symlink_placeholders,
+void create_or_remember_link(llist_t **link_placeholders,
const char *target,
- const char *linkname) FAST_FUNC;
-void create_symlinks_from_list(llist_t *list) FAST_FUNC;
+ const char *linkname,
+ int hard_link) FAST_FUNC;
+void create_links_from_list(llist_t *list) FAST_FUNC;
void data_align(archive_handle_t *archive_handle, unsigned boundary) FAST_FUNC;
const llist_t *find_list_entry(const llist_t *list, const char *filename) FAST_FUNC;
diff --git a/testsuite/tar.tests b/testsuite/tar.tests
index 1675b07..6c479d3 100755
--- a/testsuite/tar.tests
+++ b/testsuite/tar.tests
@@ -365,4 +365,20 @@ n8fYaKlioCTzL2oXYczyUUIP4u5IpwoSEwWdtoA=
SKIP=
cd .. || exit 1; rm -rf tar.tempdir 2>/dev/null
+mkdir tar.tempdir && cd tar.tempdir || exit 1
+testing "Symlinks and hardlinks coexist" '\
+mkdir dir
+>dir/a
+ln -s ../dir/a dir/b
+ln dir/b dir/c
+mkdir new
+tar cf - dir/* | tar -C new -xvf - 2>&1
+' "\
+dir/a
+dir/b
+dir/c
+" \
+"" ""
+cd .. || exit 1; rm -rf tar.tempdir 2>/dev/null
+
exit $FAILCOUNT
generated by cgit v1.1 at 2024-12-26 03:42:38 +0000