mirror of
https://github.com/moparisthebest/pacman
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d6ccd44390
Ensures that config.h is always ordered correctly (first) in the includes. Also means that new source files get this for free without having to remember to add it. We opt for -imacros over -include as its more portable, and the added constraint by -imacros doesn't bother us for config.h. This also touches the HACKING file to remove the explicit mention of config.h as part of the includes. Signed-off-by: Dave Reisner <dreisner@archlinux.org> Signed-off-by: Dan McGee <dan@archlinux.org>
639 lines
19 KiB
C
639 lines
19 KiB
C
/*
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* download.c
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*
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* Copyright (c) 2006-2011 Pacman Development Team <pacman-dev@archlinux.org>
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* Copyright (c) 2002-2006 by Judd Vinet <jvinet@zeroflux.org>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <stdlib.h>
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#include <stdio.h>
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#include <errno.h>
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#include <string.h>
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#include <unistd.h>
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#include <sys/time.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <signal.h>
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#ifdef HAVE_LIBCURL
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#include <curl/curl.h>
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#endif
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/* libalpm */
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#include "dload.h"
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#include "alpm_list.h"
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#include "alpm.h"
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#include "log.h"
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#include "util.h"
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#include "handle.h"
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#ifdef HAVE_LIBCURL
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static const char *get_filename(const char *url)
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{
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char *filename = strrchr(url, '/');
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if(filename != NULL) {
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filename++;
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}
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return filename;
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}
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static char *get_fullpath(const char *path, const char *filename,
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const char *suffix)
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{
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char *filepath;
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/* len = localpath len + filename len + suffix len + null */
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size_t len = strlen(path) + strlen(filename) + strlen(suffix) + 1;
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MALLOC(filepath, len, return NULL);
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snprintf(filepath, len, "%s%s%s", path, filename, suffix);
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return filepath;
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}
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static CURL *get_libcurl_handle(alpm_handle_t *handle)
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{
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if(!handle->curl) {
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curl_global_init(CURL_GLOBAL_SSL);
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handle->curl = curl_easy_init();
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}
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return handle->curl;
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}
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enum {
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ABORT_SIGINT = 1,
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ABORT_OVER_MAXFILESIZE
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};
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static int dload_interrupted;
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static void inthandler(int UNUSED signum)
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{
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dload_interrupted = ABORT_SIGINT;
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}
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static int curl_progress(void *file, double dltotal, double dlnow,
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double UNUSED ultotal, double UNUSED ulnow)
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{
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struct dload_payload *payload = (struct dload_payload *)file;
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off_t current_size, total_size;
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/* SIGINT sent, abort by alerting curl */
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if(dload_interrupted) {
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return 1;
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}
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current_size = payload->initial_size + (off_t)dlnow;
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/* is our filesize still under any set limit? */
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if(payload->max_size && current_size > payload->max_size) {
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dload_interrupted = ABORT_OVER_MAXFILESIZE;
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return 1;
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}
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/* none of what follows matters if the front end has no callback */
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if(payload->handle->dlcb == NULL) {
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return 0;
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}
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total_size = payload->initial_size + (off_t)dltotal;
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if(DOUBLE_EQ(dltotal, 0.0) || payload->prevprogress == total_size) {
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return 0;
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}
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/* initialize the progress bar here to avoid displaying it when
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* a repo is up to date and nothing gets downloaded */
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if(payload->prevprogress == 0) {
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payload->handle->dlcb(payload->remote_name, 0, (off_t)dltotal);
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}
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payload->handle->dlcb(payload->remote_name, current_size, total_size);
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payload->prevprogress = current_size;
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return 0;
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}
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static int curl_gethost(const char *url, char *buffer, size_t buf_len)
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{
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size_t hostlen;
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char *p, *q;
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if(strncmp(url, "file://", 7) == 0) {
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p = _("disk");
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hostlen = strlen(p);
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} else {
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p = strstr(url, "//");
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if(!p) {
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return 1;
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}
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p += 2; /* jump over the found // */
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hostlen = strcspn(p, "/");
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/* there might be a user:pass@ on the URL. hide it. avoid using memrchr()
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* for portability concerns. */
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q = p + hostlen;
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while(--q > p) {
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if(*q == '@') {
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break;
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}
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}
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if(*q == '@' && p != q) {
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hostlen -= q - p + 1;
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p = q + 1;
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}
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}
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if(hostlen > buf_len - 1) {
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/* buffer overflow imminent */
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return 1;
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}
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memcpy(buffer, p, hostlen);
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buffer[hostlen] = '\0';
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return 0;
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}
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static int utimes_long(const char *path, long seconds)
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{
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if(seconds != -1) {
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struct timeval tv[2];
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memset(&tv, 0, sizeof(tv));
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tv[0].tv_sec = tv[1].tv_sec = seconds;
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return utimes(path, tv);
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}
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return 0;
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}
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/* prefix to avoid possible future clash with getumask(3) */
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static mode_t _getumask(void)
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{
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mode_t mask = umask(0);
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umask(mask);
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return mask;
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}
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static size_t parse_headers(void *ptr, size_t size, size_t nmemb, void *user)
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{
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size_t realsize = size * nmemb;
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const char *fptr, *endptr = NULL;
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const char * const cd_header = "Content-Disposition:";
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const char * const fn_key = "filename=";
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struct dload_payload *payload = (struct dload_payload *)user;
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if(_alpm_raw_ncmp(cd_header, ptr, strlen(cd_header)) == 0) {
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if((fptr = strstr(ptr, fn_key))) {
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fptr += strlen(fn_key);
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/* find the end of the field, which is either a semi-colon, or the end of
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* the data. As per curl_easy_setopt(3), we cannot count on headers being
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* null terminated, so we look for the closing \r\n */
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endptr = fptr + strcspn(fptr, ";\r\n") - 1;
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/* remove quotes */
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if(*fptr == '"' && *endptr == '"') {
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fptr++;
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endptr--;
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}
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STRNDUP(payload->content_disp_name, fptr, endptr - fptr + 1,
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RET_ERR(payload->handle, ALPM_ERR_MEMORY, realsize));
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}
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}
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return realsize;
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}
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static void curl_set_handle_opts(struct dload_payload *payload,
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CURL *curl, char *error_buffer)
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{
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alpm_handle_t *handle = payload->handle;
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const char *useragent = getenv("HTTP_USER_AGENT");
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struct stat st;
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/* the curl_easy handle is initialized with the alpm handle, so we only need
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* to reset the handle's parameters for each time it's used. */
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curl_easy_reset(curl);
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curl_easy_setopt(curl, CURLOPT_URL, payload->fileurl);
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curl_easy_setopt(curl, CURLOPT_FAILONERROR, 1L);
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curl_easy_setopt(curl, CURLOPT_ERRORBUFFER, error_buffer);
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curl_easy_setopt(curl, CURLOPT_CONNECTTIMEOUT, 10L);
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curl_easy_setopt(curl, CURLOPT_FILETIME, 1L);
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curl_easy_setopt(curl, CURLOPT_NOPROGRESS, 0L);
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curl_easy_setopt(curl, CURLOPT_FOLLOWLOCATION, 1L);
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curl_easy_setopt(curl, CURLOPT_PROGRESSFUNCTION, curl_progress);
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curl_easy_setopt(curl, CURLOPT_PROGRESSDATA, (void *)payload);
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curl_easy_setopt(curl, CURLOPT_LOW_SPEED_LIMIT, 1024L);
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curl_easy_setopt(curl, CURLOPT_LOW_SPEED_TIME, 10L);
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curl_easy_setopt(curl, CURLOPT_HEADERFUNCTION, parse_headers);
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curl_easy_setopt(curl, CURLOPT_WRITEHEADER, (void *)payload);
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curl_easy_setopt(curl, CURLOPT_NETRC, CURL_NETRC_OPTIONAL);
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_alpm_log(handle, ALPM_LOG_DEBUG, "url: %s\n", payload->fileurl);
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if(payload->max_size) {
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_alpm_log(handle, ALPM_LOG_DEBUG, "maxsize: %jd\n",
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(intmax_t)payload->max_size);
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curl_easy_setopt(curl, CURLOPT_MAXFILESIZE_LARGE,
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(curl_off_t)payload->max_size);
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}
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if(useragent != NULL) {
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curl_easy_setopt(curl, CURLOPT_USERAGENT, useragent);
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}
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if(!payload->allow_resume && !payload->force && payload->destfile_name &&
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stat(payload->destfile_name, &st) == 0) {
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/* start from scratch, but only download if our local is out of date. */
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curl_easy_setopt(curl, CURLOPT_TIMECONDITION, CURL_TIMECOND_IFMODSINCE);
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curl_easy_setopt(curl, CURLOPT_TIMEVALUE, (long)st.st_mtime);
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_alpm_log(handle, ALPM_LOG_DEBUG,
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"using time condition: %lu\n", (long)st.st_mtime);
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} else if(stat(payload->tempfile_name, &st) == 0 && payload->allow_resume) {
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/* a previous partial download exists, resume from end of file. */
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payload->tempfile_openmode = "ab";
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curl_easy_setopt(curl, CURLOPT_RESUME_FROM_LARGE, (curl_off_t)st.st_size);
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_alpm_log(handle, ALPM_LOG_DEBUG,
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"tempfile found, attempting continuation from %jd bytes\n",
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(intmax_t)st.st_size);
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payload->initial_size = st.st_size;
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}
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}
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static void mask_signal(int signal, void (*handler)(int),
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struct sigaction *origaction)
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{
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struct sigaction newaction;
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newaction.sa_handler = handler;
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sigemptyset(&newaction.sa_mask);
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newaction.sa_flags = 0;
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sigaction(signal, NULL, origaction);
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sigaction(signal, &newaction, NULL);
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}
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static void unmask_signal(int signal, struct sigaction sa)
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{
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sigaction(signal, &sa, NULL);
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}
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static FILE *create_tempfile(struct dload_payload *payload, const char *localpath)
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{
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int fd;
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FILE *fp;
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char *randpath;
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size_t len;
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/* create a random filename, which is opened with O_EXCL */
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len = strlen(localpath) + 14 + 1;
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MALLOC(randpath, len, RET_ERR(payload->handle, ALPM_ERR_MEMORY, NULL));
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snprintf(randpath, len, "%salpmtmp.XXXXXX", localpath);
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if((fd = mkstemp(randpath)) == -1 ||
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fchmod(fd, ~(_getumask()) & 0666) ||
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!(fp = fdopen(fd, payload->tempfile_openmode))) {
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unlink(randpath);
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CLOSE(fd);
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_alpm_log(payload->handle, ALPM_LOG_ERROR,
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_("failed to create temporary file for download\n"));
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return NULL;
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}
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/* fp now points to our alpmtmp.XXXXXX */
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free(payload->tempfile_name);
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payload->tempfile_name = randpath;
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free(payload->remote_name);
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STRDUP(payload->remote_name, strrchr(randpath, '/') + 1,
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RET_ERR(payload->handle, ALPM_ERR_MEMORY, NULL));
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return fp;
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}
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/* RFC1123 states applications should support this length */
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#define HOSTNAME_SIZE 256
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static int curl_download_internal(struct dload_payload *payload,
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const char *localpath, char **final_file)
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{
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int ret = -1;
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FILE *localf = NULL;
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char *effective_url;
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char hostname[HOSTNAME_SIZE];
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char error_buffer[CURL_ERROR_SIZE] = {0};
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struct stat st;
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long timecond, respcode = 0, remote_time = -1;
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double remote_size, bytes_dl;
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struct sigaction orig_sig_pipe, orig_sig_int;
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/* shortcut to our handle within the payload */
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alpm_handle_t *handle = payload->handle;
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CURL *curl = get_libcurl_handle(handle);
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handle->pm_errno = 0;
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payload->tempfile_openmode = "wb";
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if(!payload->remote_name) {
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STRDUP(payload->remote_name, get_filename(payload->fileurl),
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RET_ERR(handle, ALPM_ERR_MEMORY, -1));
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}
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if(curl_gethost(payload->fileurl, hostname, sizeof(hostname)) != 0) {
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_alpm_log(handle, ALPM_LOG_ERROR, _("url '%s' is invalid\n"), payload->fileurl);
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RET_ERR(handle, ALPM_ERR_SERVER_BAD_URL, -1);
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}
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if(strlen(payload->remote_name) > 0 && strcmp(payload->remote_name, ".sig") != 0) {
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payload->destfile_name = get_fullpath(localpath, payload->remote_name, "");
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payload->tempfile_name = get_fullpath(localpath, payload->remote_name, ".part");
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if(!payload->destfile_name || !payload->tempfile_name) {
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goto cleanup;
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}
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} else {
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/* URL doesn't contain a filename, so make a tempfile. We can't support
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* resuming this kind of download; partial transfers will be destroyed */
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payload->unlink_on_fail = 1;
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localf = create_tempfile(payload, localpath);
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if(localf == NULL) {
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goto cleanup;
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}
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}
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curl_set_handle_opts(payload, curl, error_buffer);
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if(localf == NULL) {
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localf = fopen(payload->tempfile_name, payload->tempfile_openmode);
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if(localf == NULL) {
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goto cleanup;
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}
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}
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_alpm_log(handle, ALPM_LOG_DEBUG,
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"opened tempfile for download: %s (%s)\n", payload->tempfile_name,
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payload->tempfile_openmode);
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curl_easy_setopt(curl, CURLOPT_WRITEDATA, localf);
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/* ignore any SIGPIPE signals- these may occur if our FTP socket dies or
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* something along those lines. Store the old signal handler first. */
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mask_signal(SIGPIPE, SIG_IGN, &orig_sig_pipe);
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mask_signal(SIGINT, &inthandler, &orig_sig_int);
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/* perform transfer */
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payload->curlerr = curl_easy_perform(curl);
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/* disconnect relationships from the curl handle for things that might go out
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* of scope, but could still be touched on connection teardown. This really
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* only applies to FTP transfers. See FS#26327 for an example. */
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curl_easy_setopt(curl, CURLOPT_NOPROGRESS, 1L);
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curl_easy_setopt(curl, CURLOPT_ERRORBUFFER, (char *)NULL);
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/* was it a success? */
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switch(payload->curlerr) {
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case CURLE_OK:
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/* get http/ftp response code */
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curl_easy_getinfo(curl, CURLINFO_RESPONSE_CODE, &respcode);
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_alpm_log(handle, ALPM_LOG_DEBUG, "response code: %ld\n", respcode);
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if(respcode >= 400) {
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payload->unlink_on_fail = 1;
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/* non-translated message is same as libcurl */
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snprintf(error_buffer, sizeof(error_buffer),
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"The requested URL returned error: %ld", respcode);
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_alpm_log(handle, ALPM_LOG_ERROR,
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_("failed retrieving file '%s' from %s : %s\n"),
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payload->remote_name, hostname, error_buffer);
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goto cleanup;
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}
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break;
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case CURLE_ABORTED_BY_CALLBACK:
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/* handle the interrupt accordingly */
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if(dload_interrupted == ABORT_OVER_MAXFILESIZE) {
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payload->curlerr = CURLE_FILESIZE_EXCEEDED;
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handle->pm_errno = ALPM_ERR_LIBCURL;
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/* use the 'size exceeded' message from libcurl */
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_alpm_log(handle, ALPM_LOG_ERROR,
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_("failed retrieving file '%s' from %s : %s\n"),
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payload->remote_name, hostname,
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curl_easy_strerror(CURLE_FILESIZE_EXCEEDED));
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}
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goto cleanup;
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default:
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/* delete zero length downloads */
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if(fstat(fileno(localf), &st) == 0 && st.st_size == 0) {
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payload->unlink_on_fail = 1;
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}
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if(!payload->errors_ok) {
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handle->pm_errno = ALPM_ERR_LIBCURL;
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_alpm_log(handle, ALPM_LOG_ERROR,
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_("failed retrieving file '%s' from %s : %s\n"),
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payload->remote_name, hostname, error_buffer);
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} else {
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_alpm_log(handle, ALPM_LOG_DEBUG,
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"failed retrieving file '%s' from %s : %s\n",
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payload->remote_name, hostname, error_buffer);
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}
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goto cleanup;
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}
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/* retrieve info about the state of the transfer */
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curl_easy_getinfo(curl, CURLINFO_FILETIME, &remote_time);
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curl_easy_getinfo(curl, CURLINFO_CONTENT_LENGTH_DOWNLOAD, &remote_size);
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curl_easy_getinfo(curl, CURLINFO_SIZE_DOWNLOAD, &bytes_dl);
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curl_easy_getinfo(curl, CURLINFO_CONDITION_UNMET, &timecond);
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curl_easy_getinfo(curl, CURLINFO_EFFECTIVE_URL, &effective_url);
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/* time condition was met and we didn't download anything. we need to
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* clean up the 0 byte .part file that's left behind. */
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if(timecond == 1 && DOUBLE_EQ(bytes_dl, 0)) {
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_alpm_log(handle, ALPM_LOG_DEBUG, "file met time condition\n");
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ret = 1;
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unlink(payload->tempfile_name);
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goto cleanup;
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}
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/* remote_size isn't necessarily the full size of the file, just what the
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* server reported as remaining to download. compare it to what curl reported
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* as actually being transferred during curl_easy_perform() */
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if(!DOUBLE_EQ(remote_size, -1) && !DOUBLE_EQ(bytes_dl, -1) &&
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!DOUBLE_EQ(bytes_dl, remote_size)) {
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|
handle->pm_errno = ALPM_ERR_RETRIEVE;
|
|
_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 cleanup;
|
|
}
|
|
|
|
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, 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);
|
|
}
|
|
|
|
/* 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) {
|
|
raise(SIGINT);
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
#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)
|
|
{
|
|
alpm_handle_t *handle = payload->handle;
|
|
|
|
if(handle->fetchcb == NULL) {
|
|
#ifdef HAVE_LIBCURL
|
|
return curl_download_internal(payload, localpath, final_file);
|
|
#else
|
|
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;
|
|
}
|
|
}
|
|
|
|
/** Fetch a remote pkg. */
|
|
char SYMEXPORT *alpm_fetch_pkgurl(alpm_handle_t *handle, const char *url)
|
|
{
|
|
char *filepath;
|
|
const char *cachedir;
|
|
char *final_file = NULL;
|
|
struct dload_payload payload;
|
|
int ret;
|
|
|
|
CHECK_HANDLE(handle, return NULL);
|
|
ASSERT(url, RET_ERR(handle, ALPM_ERR_WRONG_ARGS, NULL));
|
|
|
|
/* find a valid cache dir to download to */
|
|
cachedir = _alpm_filecache_setup(handle);
|
|
|
|
memset(&payload, 0, sizeof(struct dload_payload));
|
|
payload.handle = handle;
|
|
STRDUP(payload.fileurl, url, RET_ERR(handle, ALPM_ERR_MEMORY, NULL));
|
|
payload.allow_resume = 1;
|
|
|
|
/* download the file */
|
|
ret = _alpm_download(&payload, cachedir, &final_file);
|
|
_alpm_dload_payload_reset(&payload);
|
|
if(ret == -1) {
|
|
_alpm_log(handle, ALPM_LOG_WARNING, _("failed to download %s\n"), url);
|
|
free(final_file);
|
|
return NULL;
|
|
}
|
|
_alpm_log(handle, ALPM_LOG_DEBUG, "successfully downloaded %s\n", url);
|
|
|
|
/* attempt to download the signature */
|
|
if(ret == 0 && (handle->siglevel & ALPM_SIG_PACKAGE)) {
|
|
char *sig_final_file = NULL;
|
|
size_t len;
|
|
|
|
len = strlen(url) + 5;
|
|
MALLOC(payload.fileurl, len, RET_ERR(handle, ALPM_ERR_MEMORY, NULL));
|
|
snprintf(payload.fileurl, len, "%s.sig", url);
|
|
payload.handle = handle;
|
|
payload.force = 1;
|
|
payload.errors_ok = (handle->siglevel & ALPM_SIG_PACKAGE_OPTIONAL);
|
|
|
|
/* set hard upper limit of 16KiB */
|
|
payload.max_size = 16 * 1024;
|
|
|
|
ret = _alpm_download(&payload, cachedir, &sig_final_file);
|
|
if(ret == -1 && !payload.errors_ok) {
|
|
_alpm_log(handle, ALPM_LOG_WARNING,
|
|
_("failed to download %s\n"), payload.fileurl);
|
|
/* Warn now, but don't return NULL. We will fail later during package
|
|
* load time. */
|
|
} else if(ret == 0) {
|
|
_alpm_log(handle, ALPM_LOG_DEBUG,
|
|
"successfully downloaded %s\n", payload.fileurl);
|
|
}
|
|
FREE(sig_final_file);
|
|
_alpm_dload_payload_reset(&payload);
|
|
}
|
|
|
|
/* we should be able to find the file the second time around */
|
|
filepath = _alpm_filecache_find(handle, final_file);
|
|
free(final_file);
|
|
|
|
return filepath;
|
|
}
|
|
|
|
void _alpm_dload_payload_reset(struct dload_payload *payload)
|
|
{
|
|
ASSERT(payload, return);
|
|
|
|
FREE(payload->remote_name);
|
|
FREE(payload->tempfile_name);
|
|
FREE(payload->destfile_name);
|
|
FREE(payload->content_disp_name);
|
|
FREE(payload->fileurl);
|
|
}
|
|
|
|
/* vim: set ts=2 sw=2 noet: */
|