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Handle .part files that are the size of the correct package

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In rare cases, likely due to a well timed Ctrl+C, but possibly due to a
broken mirror, a ".part" file may have size at least that of the correct
package size.

When encountering this issue, currently pacman fails in different ways
depending on where the package falls in the list to download.  If last,
"wrong or NULL argument passed" error is reported, or a "invalid or
corrupt package" issue if not.

Capture these .part files, and remove the extension. This lets pacman
either use the package if valid, or offer to remove it if it fails checksum
or signature verification.

Signed-off-by: Allan McRae <allan@archlinux.org>
(cherry picked from commit e6a6d30793)
This commit is contained in:
Allan McRae 2019-11-15 23:29:20 +10:00 • committed by Andrew Gregory
parent c2fa9f85cc
commit 76c50e3439
2 changed files with 18 additions and 2 deletions
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6
lib/libalpm/dload.c
View file

@ -414,6 +414,12 @@ static int curl_download_internal(struct dload_payload *payload,
curl_set_handle_opts(payload, curl, error_buffer);
if(payload->max_size == payload->initial_size) {
/* .part file is complete */
ret = 0;
goto cleanup;
}
if(localf == NULL) {
localf = fopen(payload->tempfile_name, payload->tempfile_openmode);
if(localf == NULL) {

14
lib/libalpm/sync.c
View file

@ -731,6 +731,8 @@ static int find_dl_candidates(alpm_db_t *repo, alpm_list_t **files)
alpm_pkg_t *spkg = i->data;
if(spkg->origin != ALPM_PKG_FROM_FILE && repo == spkg->origin_data.db) {
char *fpath = NULL;
if(!repo->servers) {
handle->pm_errno = ALPM_ERR_SERVER_NONE;
_alpm_log(handle, ALPM_LOG_ERROR, "%s: %s\n",
@ -738,13 +740,21 @@ static int find_dl_candidates(alpm_db_t *repo, alpm_list_t **files)
return 1;
}
if(spkg->download_size != 0) {
struct dload_payload *payload;
ASSERT(spkg->filename != NULL, RET_ERR(handle, ALPM_ERR_PKG_INVALID_NAME, -1));
if(spkg->download_size == 0) {
/* check for file in cache - allows us to handle complete .part files */
fpath = _alpm_filecache_find(handle, spkg->filename);
}
if(spkg->download_size != 0 || !fpath) {
struct dload_payload *payload;
payload = build_payload(handle, spkg->filename, spkg->size, repo->servers);
ASSERT(payload, return -1);
*files = alpm_list_add(*files, payload);
}
FREE(fpath);
}
}