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authorAndrew Gregory <andrew.gregory.8@gmail.com>2015-12-04 14:14:31 -0500
committerAllan McRae <allan@archlinux.org>2015-12-05 17:46:12 +1000
commitbb5e6c3b767e923fdb6cbdd75a930838c9b2a018 (patch)
tree9187320f1fef6a15a85c8225ab7a0fbf0bb6e7dd
parent8a373096f590925465f624d7b0bf466b02143ce1 (diff)
downloadpacman-bb5e6c3b767e923fdb6cbdd75a930838c9b2a018.tar.xz
always unlink files before extraction
libarchive will not extract a directory over an existing directory symlink, making it impossible to replace a symlink with a directory across packages. Adding the ARCHIVE_EXTRACT_UNLINK and ARCHIVE_EXTRACT_SECURE_SYMLINKS causes libarchive to unlink the existing symlink and prevents it from extracting any paths that contain a symlink, which we should not be doing anyway. Signed-off-by: Andrew Gregory <andrew.gregory.8@gmail.com> Signed-off-by: Allan McRae <allan@archlinux.org>
-rw-r--r--lib/libalpm/add.c11
1 files changed, 3 insertions, 8 deletions
diff --git a/lib/libalpm/add.c b/lib/libalpm/add.c
index 2684e94f..63eda49b 100644
--- a/lib/libalpm/add.c
+++ b/lib/libalpm/add.c
@@ -112,7 +112,9 @@ static int perform_extraction(alpm_handle_t *handle, struct archive *archive,
int ret;
const int archive_flags = ARCHIVE_EXTRACT_OWNER |
ARCHIVE_EXTRACT_PERM |
- ARCHIVE_EXTRACT_TIME;
+ ARCHIVE_EXTRACT_TIME |
+ ARCHIVE_EXTRACT_UNLINK |
+ ARCHIVE_EXTRACT_SECURE_SYMLINKS;
archive_entry_set_pathname(entry, filename);
@@ -301,13 +303,6 @@ static int extract_single_file(alpm_handle_t *handle, struct archive *archive,
strcpy(filename + filename_len, ".pacnew");
}
- if(handle->trans->flags & ALPM_TRANS_FLAG_FORCE) {
- /* if FORCE was used, unlink() each file (whether it's there
- * or not) before extracting. This prevents the old "Text file busy"
- * error that crops up if forcing a glibc or pacman upgrade. */
- unlink(filename);
- }
-
_alpm_log(handle, ALPM_LOG_DEBUG, "extracting %s\n", filename);
if(perform_extraction(handle, archive, entry, filename)) {
errors++;