From 84723cab5dfc9b7f4594135295974f771ceb6e5e Mon Sep 17 00:00:00 2001 From: Anatol Pomozov Date: Mon, 20 Apr 2020 01:42:53 -0700 Subject: Cleanup the old sequential download code All users of _alpm_download() have been refactored to the new API. It is time to remove the old _alpm_download() functionality now. This change also removes obsolete SIGPIPE signal handler functionality (this is a leftover from libfetch days). Signed-off-by: Anatol Pomozov --- lib/libalpm/dload.c | 349 +++------------------------------------------------- 1 file changed, 16 insertions(+), 333 deletions(-) (limited to 'lib/libalpm/dload.c') diff --git a/lib/libalpm/dload.c b/lib/libalpm/dload.c index c1ec1e70..a91bb1ac 100644 --- a/lib/libalpm/dload.c +++ b/lib/libalpm/dload.c @@ -78,10 +78,6 @@ enum { }; static int dload_interrupted; -static void inthandler(int UNUSED signum) -{ - dload_interrupted = ABORT_SIGINT; -} static int dload_progress_cb(void *file, curl_off_t dltotal, curl_off_t dlnow, curl_off_t UNUSED ultotal, curl_off_t UNUSED ulnow) @@ -236,8 +232,7 @@ static size_t dload_parseheader_cb(void *ptr, size_t size, size_t nmemb, void *u return realsize; } -static void curl_set_handle_opts(struct dload_payload *payload, - CURL *curl, char *error_buffer) +static void curl_set_handle_opts(CURL *curl, struct dload_payload *payload) { alpm_handle_t *handle = payload->handle; const char *useragent = getenv("HTTP_USER_AGENT"); @@ -247,7 +242,7 @@ static void curl_set_handle_opts(struct dload_payload *payload, * to reset the handle's parameters for each time it's used. */ curl_easy_reset(curl); curl_easy_setopt(curl, CURLOPT_URL, payload->fileurl); - curl_easy_setopt(curl, CURLOPT_ERRORBUFFER, error_buffer); + curl_easy_setopt(curl, CURLOPT_ERRORBUFFER, payload->error_buffer); curl_easy_setopt(curl, CURLOPT_CONNECTTIMEOUT, 10L); curl_easy_setopt(curl, CURLOPT_MAXREDIRS, 10L); curl_easy_setopt(curl, CURLOPT_FILETIME, 1L); @@ -301,24 +296,6 @@ static void curl_set_handle_opts(struct dload_payload *payload, } } -static void mask_signal(int signum, void (*handler)(int), - struct sigaction *origaction) -{ - struct sigaction newaction; - - newaction.sa_handler = handler; - sigemptyset(&newaction.sa_mask); - newaction.sa_flags = 0; - - sigaction(signum, NULL, origaction); - sigaction(signum, &newaction, NULL); -} - -static void unmask_signal(int signum, struct sigaction *sa) -{ - sigaction(signum, sa, NULL); -} - static FILE *create_tempfile(struct dload_payload *payload, const char *localpath) { int fd; @@ -353,261 +330,8 @@ static FILE *create_tempfile(struct dload_payload *payload, const char *localpat /* RFC1123 states applications should support this length */ #define HOSTNAME_SIZE 256 -static int curl_download_internal(struct dload_payload *payload, - const char *localpath, char **final_file, const char **final_url) -{ - int ret = -1; - FILE *localf = NULL; - char *effective_url; - char hostname[HOSTNAME_SIZE]; - char error_buffer[CURL_ERROR_SIZE] = {0}; - struct stat st; - long timecond, remote_time = -1; - double remote_size, bytes_dl; - struct sigaction orig_sig_pipe, orig_sig_int; - CURLcode curlerr; - alpm_download_event_init_t init_cb_data = {0}; - alpm_download_event_completed_t completed_cb_data = {0}; - /* shortcut to our handle within the payload */ - alpm_handle_t *handle = payload->handle; - CURL *curl = curl_easy_init(); - handle->pm_errno = ALPM_ERR_OK; - payload->curl = curl; - - /* make sure these are NULL */ - FREE(payload->tempfile_name); - FREE(payload->destfile_name); - FREE(payload->content_disp_name); - - payload->tempfile_openmode = "wb"; - if(!payload->remote_name) { - STRDUP(payload->remote_name, get_filename(payload->fileurl), - RET_ERR(handle, ALPM_ERR_MEMORY, -1)); - } - if(curl_gethost(payload->fileurl, hostname, sizeof(hostname)) != 0) { - _alpm_log(handle, ALPM_LOG_ERROR, _("url '%s' is invalid\n"), payload->fileurl); - RET_ERR(handle, ALPM_ERR_SERVER_BAD_URL, -1); - } - - if(payload->remote_name && strlen(payload->remote_name) > 0 && - strcmp(payload->remote_name, ".sig") != 0) { - payload->destfile_name = get_fullpath(localpath, payload->remote_name, ""); - payload->tempfile_name = get_fullpath(localpath, payload->remote_name, ".part"); - if(!payload->destfile_name || !payload->tempfile_name) { - goto cleanup; - } - } else { - /* URL doesn't contain a filename, so make a tempfile. We can't support - * resuming this kind of download; partial transfers will be destroyed */ - payload->unlink_on_fail = 1; - - localf = create_tempfile(payload, localpath); - if(localf == NULL) { - goto cleanup; - } - } - - curl_set_handle_opts(payload, curl, error_buffer); - - if(payload->max_size == payload->initial_size && payload->max_size != 0) { - /* .part file is complete */ - ret = 0; - goto cleanup; - } - - if(localf == NULL) { - localf = fopen(payload->tempfile_name, payload->tempfile_openmode); - if(localf == NULL) { - _alpm_log(handle, ALPM_LOG_ERROR, - _("could not open file %s: %s\n"), - payload->tempfile_name, strerror(errno)); - GOTO_ERR(handle, ALPM_ERR_RETRIEVE, cleanup); - } - } - - _alpm_log(handle, ALPM_LOG_DEBUG, - "opened tempfile for download: %s (%s)\n", payload->tempfile_name, - payload->tempfile_openmode); - - curl_easy_setopt(curl, CURLOPT_WRITEDATA, localf); - - /* Ignore any SIGPIPE signals. With libcurl, these shouldn't be happening, - * but better safe than sorry. Store the old signal handler first. */ - mask_signal(SIGPIPE, SIG_IGN, &orig_sig_pipe); - dload_interrupted = 0; - mask_signal(SIGINT, &inthandler, &orig_sig_int); - - handle->dlcb(payload->remote_name, ALPM_DOWNLOAD_INIT, &init_cb_data); - - /* perform transfer */ - curlerr = curl_easy_perform(curl); - _alpm_log(handle, ALPM_LOG_DEBUG, "curl returned error %d from transfer\n", - curlerr); - - /* disconnect relationships from the curl handle for things that might go out - * of scope, but could still be touched on connection teardown. This really - * only applies to FTP transfers. */ - curl_easy_setopt(curl, CURLOPT_NOPROGRESS, 1L); - curl_easy_setopt(curl, CURLOPT_ERRORBUFFER, (char *)NULL); - - /* was it a success? */ - switch(curlerr) { - case CURLE_OK: - /* get http/ftp response code */ - _alpm_log(handle, ALPM_LOG_DEBUG, "response code: %ld\n", payload->respcode); - if(payload->respcode >= 400) { - payload->unlink_on_fail = 1; - if(!payload->errors_ok) { - handle->pm_errno = ALPM_ERR_RETRIEVE; - /* non-translated message is same as libcurl */ - snprintf(error_buffer, sizeof(error_buffer), - "The requested URL returned error: %ld", payload->respcode); - _alpm_log(handle, ALPM_LOG_ERROR, - _("failed retrieving file '%s' from %s : %s\n"), - payload->remote_name, hostname, error_buffer); - } - goto cleanup; - } - break; - case CURLE_ABORTED_BY_CALLBACK: - /* handle the interrupt accordingly */ - if(dload_interrupted == ABORT_OVER_MAXFILESIZE) { - curlerr = CURLE_FILESIZE_EXCEEDED; - payload->unlink_on_fail = 1; - handle->pm_errno = ALPM_ERR_LIBCURL; - _alpm_log(handle, ALPM_LOG_ERROR, - _("failed retrieving file '%s' from %s : expected download size exceeded\n"), - payload->remote_name, hostname); - } - goto cleanup; - case CURLE_COULDNT_RESOLVE_HOST: - payload->unlink_on_fail = 1; - handle->pm_errno = ALPM_ERR_SERVER_BAD_URL; - _alpm_log(handle, ALPM_LOG_ERROR, - _("failed retrieving file '%s' from %s : %s\n"), - payload->remote_name, hostname, error_buffer); - goto cleanup; - default: - /* delete zero length downloads */ - if(fstat(fileno(localf), &st) == 0 && st.st_size == 0) { - payload->unlink_on_fail = 1; - } - if(!payload->errors_ok) { - handle->pm_errno = ALPM_ERR_LIBCURL; - _alpm_log(handle, ALPM_LOG_ERROR, - _("failed retrieving file '%s' from %s : %s\n"), - payload->remote_name, hostname, error_buffer); - } else { - _alpm_log(handle, ALPM_LOG_DEBUG, - "failed retrieving file '%s' from %s : %s\n", - payload->remote_name, hostname, error_buffer); - } - goto cleanup; - } - - /* retrieve info about the state of the transfer */ - curl_easy_getinfo(curl, CURLINFO_FILETIME, &remote_time); - curl_easy_getinfo(curl, CURLINFO_CONTENT_LENGTH_DOWNLOAD, &remote_size); - curl_easy_getinfo(curl, CURLINFO_SIZE_DOWNLOAD, &bytes_dl); - curl_easy_getinfo(curl, CURLINFO_CONDITION_UNMET, &timecond); - curl_easy_getinfo(curl, CURLINFO_EFFECTIVE_URL, &effective_url); - - if(final_url != NULL) { - *final_url = effective_url; - } - - /* time condition was met and we didn't download anything. we need to - * clean up the 0 byte .part file that's left behind. */ - if(timecond == 1 && DOUBLE_EQ(bytes_dl, 0)) { - _alpm_log(handle, ALPM_LOG_DEBUG, "file met time condition\n"); - ret = 1; - unlink(payload->tempfile_name); - goto cleanup; - } - - /* remote_size isn't necessarily the full size of the file, just what the - * server reported as remaining to download. compare it to what curl reported - * as actually being transferred during curl_easy_perform() */ - if(!DOUBLE_EQ(remote_size, -1) && !DOUBLE_EQ(bytes_dl, -1) && - !DOUBLE_EQ(bytes_dl, remote_size)) { - _alpm_log(handle, ALPM_LOG_ERROR, _("%s appears to be truncated: %jd/%jd bytes\n"), - payload->remote_name, (intmax_t)bytes_dl, (intmax_t)remote_size); - GOTO_ERR(handle, ALPM_ERR_RETRIEVE, cleanup); - } - - if(payload->trust_remote_name) { - if(payload->content_disp_name) { - /* content-disposition header has a better name for our file */ - free(payload->destfile_name); - payload->destfile_name = get_fullpath(localpath, - get_filename(payload->content_disp_name), ""); - } else { - const char *effective_filename = strrchr(effective_url, '/'); - if(effective_filename && strlen(effective_filename) > 2) { - effective_filename++; - - /* if destfile was never set, we wrote to a tempfile. even if destfile is - * set, we may have followed some redirects and the effective url may - * have a better suggestion as to what to name our file. in either case, - * refactor destfile to this newly derived name. */ - if(!payload->destfile_name || strcmp(effective_filename, - strrchr(payload->destfile_name, '/') + 1) != 0) { - free(payload->destfile_name); - payload->destfile_name = get_fullpath(localpath, effective_filename, ""); - } - } - } - } - - ret = 0; - -cleanup: - if(localf != NULL) { - fclose(localf); - utimes_long(payload->tempfile_name, remote_time); - } - - if(ret == 0) { - const char *realname = payload->tempfile_name; - if(payload->destfile_name) { - realname = payload->destfile_name; - if(rename(payload->tempfile_name, payload->destfile_name)) { - _alpm_log(handle, ALPM_LOG_ERROR, _("could not rename %s to %s (%s)\n"), - payload->tempfile_name, payload->destfile_name, strerror(errno)); - ret = -1; - } - } - if(ret != -1 && final_file) { - STRDUP(*final_file, strrchr(realname, '/') + 1, - RET_ERR(handle, ALPM_ERR_MEMORY, -1)); - } - } - - if((ret == -1 || dload_interrupted) && payload->unlink_on_fail && - payload->tempfile_name) { - unlink(payload->tempfile_name); - } - - curl_easy_cleanup(curl); - payload->curl = NULL; - - /* restore the old signal handlers */ - unmask_signal(SIGINT, &orig_sig_int); - unmask_signal(SIGPIPE, &orig_sig_pipe); - /* if we were interrupted, trip the old handler */ - if(dload_interrupted == ABORT_SIGINT) { - raise(SIGINT); - } - - completed_cb_data.total = bytes_dl; - completed_cb_data.result = ret; - handle->dlcb(payload->remote_name, ALPM_DOWNLOAD_COMPLETED, &completed_cb_data); - - return ret; -} - /* Return 0 if retry was successful, -1 otherwise */ -static int curl_multi_retry_next_server(CURLM *curlm, CURL *curl, struct dload_payload *payload) +static int curl_retry_next_server(CURLM *curlm, CURL *curl, struct dload_payload *payload) { const char *server; size_t len; @@ -653,7 +377,7 @@ static int curl_multi_retry_next_server(CURLM *curlm, CURL *curl, struct dload_p * Returns -1 if an error happened for a required file * Returns -2 if an error happened for an optional file */ -static int curl_multi_check_finished_download(CURLM *curlm, CURLMsg *msg, +static int curl_check_finished_download(CURLM *curlm, CURLMsg *msg, const char *localpath) { alpm_handle_t *handle = NULL; @@ -694,7 +418,7 @@ static int curl_multi_check_finished_download(CURLM *curlm, CURLMsg *msg, _("failed retrieving file '%s' from %s : %s\n"), payload->remote_name, hostname, payload->error_buffer); } - if(curl_multi_retry_next_server(curlm, curl, payload) == 0) { + if(curl_retry_next_server(curlm, curl, payload) == 0) { return 2; } else { goto cleanup; @@ -718,7 +442,7 @@ static int curl_multi_check_finished_download(CURLM *curlm, CURLMsg *msg, _alpm_log(handle, ALPM_LOG_ERROR, _("failed retrieving file '%s' from %s : %s\n"), payload->remote_name, hostname, payload->error_buffer); - if(curl_multi_retry_next_server(curlm, curl, payload) == 0) { + if(curl_retry_next_server(curlm, curl, payload) == 0) { return 2; } else { goto cleanup; @@ -738,7 +462,7 @@ static int curl_multi_check_finished_download(CURLM *curlm, CURLMsg *msg, "failed retrieving file '%s' from %s : %s\n", payload->remote_name, hostname, payload->error_buffer); } - if(curl_multi_retry_next_server(curlm, curl, payload) == 0) { + if(curl_retry_next_server(curlm, curl, payload) == 0) { return 2; } else { goto cleanup; @@ -847,7 +571,7 @@ cleanup: /* Returns 0 in case if a new download transaction has been successfully started * Returns -1 if am error happened while starting a new download */ -static int curl_multi_add_payload(alpm_handle_t *handle, CURLM *curlm, +static int curl_add_payload(alpm_handle_t *handle, CURLM *curlm, struct dload_payload *payload, const char *localpath) { size_t len; @@ -901,7 +625,7 @@ static int curl_multi_add_payload(alpm_handle_t *handle, CURLM *curlm, } } - curl_set_handle_opts(payload, curl, payload->error_buffer); + curl_set_handle_opts(curl, payload); if(payload->max_size == payload->initial_size && payload->max_size != 0) { /* .part file is complete */ @@ -938,7 +662,7 @@ cleanup: return ret; } -static int curl_multi_download_internal(alpm_handle_t *handle, +static int curl_download_internal(alpm_handle_t *handle, alpm_list_t *payloads /* struct dload_payload */, const char *localpath) { @@ -955,7 +679,7 @@ static int curl_multi_download_internal(alpm_handle_t *handle, for(; still_running < parallel_downloads && payloads; still_running++) { struct dload_payload *payload = payloads->data; - if(curl_multi_add_payload(handle, curlm, payload, localpath) == 0) { + if(curl_add_payload(handle, curlm, payload, localpath) == 0) { if(!payload->signature) { alpm_download_event_init_t cb_data = {.optional = payload->errors_ok}; handle->dlcb(payload->remote_name, ALPM_DOWNLOAD_INIT, &cb_data); @@ -981,7 +705,7 @@ static int curl_multi_download_internal(alpm_handle_t *handle, while((msg = curl_multi_info_read(curlm, &msgs_left))) { if(msg->msg == CURLMSG_DONE) { - int ret = curl_multi_check_finished_download(curlm, msg, localpath); + int ret = curl_check_finished_download(curlm, msg, localpath); if(ret == -1) { /* if current payload failed to download then stop adding new payloads but wait for the * current ones @@ -1003,49 +727,19 @@ static int curl_multi_download_internal(alpm_handle_t *handle, } } - _alpm_log(handle, ALPM_LOG_DEBUG, "curl_multi_download_internal return code is %d\n", err); + _alpm_log(handle, ALPM_LOG_DEBUG, "curl_download_internal return code is %d\n", err); return err; } #endif -/** Download a file given by a URL to a local directory. - * Does not overwrite an existing file if the download fails. - * @param payload the payload context - * @param localpath the directory to save the file in - * @param final_file the real name of the downloaded file (may be NULL) - * @return 0 on success, -1 on error (pm_errno is set accordingly if errors_ok == 0) - */ -int _alpm_download(struct dload_payload *payload, const char *localpath, - char **final_file, const char **final_url) -{ - alpm_handle_t *handle = payload->handle; - - if(handle->fetchcb == NULL) { -#ifdef HAVE_LIBCURL - return curl_download_internal(payload, localpath, final_file, final_url); -#else - /* work around unused warnings when building without libcurl */ - (void)final_file; - (void)final_url; - RET_ERR(handle, ALPM_ERR_EXTERNAL_DOWNLOAD, -1); -#endif - } else { - int ret = handle->fetchcb(payload->fileurl, localpath, payload->force); - if(ret == -1 && !payload->errors_ok) { - RET_ERR(handle, ALPM_ERR_EXTERNAL_DOWNLOAD, -1); - } - return ret; - } -} - -int _alpm_multi_download(alpm_handle_t *handle, +int _alpm_download(alpm_handle_t *handle, alpm_list_t *payloads /* struct dload_payload */, const char *localpath) { if(handle->fetchcb == NULL) { #ifdef HAVE_LIBCURL - return curl_multi_download_internal(handle, payloads, localpath); + return curl_download_internal(handle, payloads, localpath); #else RET_ERR(handle, ALPM_ERR_EXTERNAL_DOWNLOAD, -1); #endif @@ -1158,7 +852,7 @@ int SYMEXPORT alpm_fetch_pkgurl(alpm_handle_t *handle, const alpm_list_t *urls, if(payloads) { event.type = ALPM_EVENT_PKG_RETRIEVE_START; EVENT(handle, &event); - if(_alpm_multi_download(handle, payloads, cachedir) == -1) { + if(_alpm_download(handle, payloads, cachedir) == -1) { _alpm_log(handle, ALPM_LOG_WARNING, _("failed to retrieve some files\n")); event.type = ALPM_EVENT_PKG_RETRIEVE_FAILED; EVENT(handle, &event); @@ -1214,14 +908,3 @@ void _alpm_dload_payload_reset(struct dload_payload *payload) FREE(payload->filepath); *payload = (struct dload_payload){0}; } - -void _alpm_dload_payload_reset_for_retry(struct dload_payload *payload) -{ - ASSERT(payload, return); - - FREE(payload->fileurl); - FREE(payload->filepath); - payload->initial_size += payload->prevprogress; - payload->prevprogress = 0; - payload->unlink_on_fail = 0; -} -- cgit v1.2.3-54-g00ecf