Frontends rely on an initialization call for setup between downloads. Checking for intialization after checking for a completed download can skip initialization in cases where files are small enough to be downloaded all at once (FS#56408). Relying on previous download size can result in multiple initializations if there are multiple non-transfer events prior to the download starting (fS#56468). Introduce a new cb_initialized variable to the payload struct and use it to ensure that the callback is initialized exactly once prior to any actual events. Fixes FS#56408, FS#56468 Signed-off-by: Andrew Gregory --- lib/libalpm/dload.c | 9 +++++---- lib/libalpm/dload.h | 1 + 2 files changed, 6 insertions(+), 4 deletions(-) diff --git a/lib/libalpm/dload.c b/lib/libalpm/dload.c index 875b689c..44db5f88 100644 --- a/lib/libalpm/dload.c +++ b/lib/libalpm/dload.c @@ -132,13 +132,13 @@ static int dload_progress_cb(void *file, curl_off_t dltotal, curl_off_t dlnow, * 0, -1: download initialized * 0, 0: non-download event * x {x>0}, x: download complete * x {x>0, x 0}: download progress, expected total is known */ - if(current_size == total_size) { - payload->handle->dlcb(payload->remote_name, dlnow, dltotal); - } else if(!payload->prevprogress) { + if(!payload->cb_initialized) { payload->handle->dlcb(payload->remote_name, 0, -1); - } else if(payload->prevprogress == current_size) { + payload->cb_initialized = 1; + } + if(payload->prevprogress == current_size) { payload->handle->dlcb(payload->remote_name, 0, 0); } else { /* do NOT include initial_size since it wasn't part of the package's * download_size (nor included in the total download size callback) */ @@ -731,7 +731,8 @@ void _alpm_dload_payload_reset_for_retry(struct dload_payload *payload) FREE(payload->fileurl); payload->initial_size += payload->prevprogress; payload->prevprogress = 0; payload->unlink_on_fail = 0; + payload->cb_initialized = 0; } /* vim: set noet: */ diff --git a/lib/libalpm/dload.h b/lib/libalpm/dload.h index 6ca775a7..ac948528 100644 --- a/lib/libalpm/dload.h +++ b/lib/libalpm/dload.h @@ -40,8 +40,9 @@ struct dload_payload { int allow_resume; int errors_ok; int unlink_on_fail; int trust_remote_name; + int cb_initialized; #ifdef HAVE_LIBCURL CURLcode curlerr; /* last error produced by curl */ #endif }; -- 2.15.1