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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>
This commit is contained in:
Allan McRae 2019-11-15 23:29:20 +10:00
parent b9faf65273
commit e6a6d30793
2 changed files with 18 additions and 2 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

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) {
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;
ASSERT(spkg->filename != NULL, RET_ERR(handle, ALPM_ERR_PKG_INVALID_NAME, -1));
payload = build_payload(handle, spkg->filename, spkg->size, repo->servers);
ASSERT(payload, return -1);
*files = alpm_list_add(*files, payload);
}
FREE(fpath);
}
}