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-rw-r--r--lib/libalpm/dload.c505
1 files changed, 220 insertions, 285 deletions
diff --git a/lib/libalpm/dload.c b/lib/libalpm/dload.c
index a98d84ac..d024c736 100644
--- a/lib/libalpm/dload.c
+++ b/lib/libalpm/dload.c
@@ -29,14 +29,9 @@
#include <sys/types.h>
#include <sys/stat.h>
#include <signal.h>
-/* the following two are needed for FreeBSD's libfetch */
-#include <limits.h> /* PATH_MAX */
-#if defined(HAVE_SYS_PARAM_H)
-#include <sys/param.h> /* MAXHOSTNAMELEN */
-#endif
-#ifdef HAVE_LIBFETCH
-#include <fetch.h>
+#ifdef HAVE_LIBCURL
+#include <curl/curl.h>
#endif
/* libalpm */
@@ -47,112 +42,184 @@
#include "util.h"
#include "handle.h"
-static char *get_filename(const char *url) {
+#ifdef HAVE_LIBCURL
+static double prevprogress; /* last download amount */
+#endif
+
+static const char *get_filename(const char *url)
+{
char *filename = strrchr(url, '/');
if(filename != NULL) {
filename++;
}
- return(filename);
+ return filename;
}
-#ifdef HAVE_LIBFETCH
-static char *get_destfile(const char *path, const char *filename) {
- char *destfile;
- /* len = localpath len + filename len + null */
- size_t len = strlen(path) + strlen(filename) + 1;
- CALLOC(destfile, len, sizeof(char), RET_ERR(PM_ERR_MEMORY, NULL));
- snprintf(destfile, len, "%s%s", path, filename);
+#ifdef HAVE_LIBCURL
+static char *get_fullpath(const char *path, const char *filename,
+ const char *suffix)
+{
+ char *filepath;
+ /* len = localpath len + filename len + suffix len + null */
+ size_t len = strlen(path) + strlen(filename) + strlen(suffix) + 1;
+ CALLOC(filepath, len, sizeof(char), RET_ERR(PM_ERR_MEMORY, NULL));
+ snprintf(filepath, len, "%s%s%s", path, filename, suffix);
- return(destfile);
+ return filepath;
}
-static char *get_tempfile(const char *path, const char *filename) {
- char *tempfile;
- /* len = localpath len + filename len + '.part' len + null */
- size_t len = strlen(path) + strlen(filename) + 6;
- CALLOC(tempfile, len, sizeof(char), RET_ERR(PM_ERR_MEMORY, NULL));
- snprintf(tempfile, len, "%s%s.part", path, filename);
+#define check_stop() if(dload_interrupted) { ret = -1; goto cleanup; }
+enum sighandlers { OLD = 0, NEW = 1 };
- return(tempfile);
+static int dload_interrupted;
+static void inthandler(int UNUSED signum)
+{
+ dload_interrupted = 1;
}
-static const char *gethost(struct url *fileurl)
+static int curl_progress(void *file, double dltotal, double dlnow,
+ double UNUSED ultotal, double UNUSED ulnow)
{
- const char *host = _("disk");
- if(strcmp(SCHEME_FILE, fileurl->scheme) != 0) {
- host = fileurl->host;
+ struct fileinfo *dlfile = (struct fileinfo *)file;
+ double current_size, total_size;
+
+ /* SIGINT sent, abort by alerting curl */
+ if(dload_interrupted) {
+ return 1;
+ }
+
+ /* none of what follows matters if the front end has no callback */
+ if(handle->dlcb == NULL) {
+ return 0;
+ }
+
+ current_size = dlfile->initial_size + dlnow;
+ total_size = dlfile->initial_size + dltotal;
+
+ if(DOUBLE_EQ(dltotal, 0) || DOUBLE_EQ(prevprogress, total_size)) {
+ return 0;
+ }
+
+ /* initialize the progress bar here to avoid displaying it when
+ * a repo is up to date and nothing gets downloaded */
+ if(DOUBLE_EQ(prevprogress, 0)) {
+ handle->dlcb(dlfile->filename, 0, (long)dltotal);
}
- return(host);
+
+ handle->dlcb(dlfile->filename, (long)current_size, (long)total_size);
+
+ prevprogress = current_size;
+
+ return 0;
}
-int dload_interrupted;
-static void inthandler(int signum)
+static int curl_gethost(const char *url, char *buffer)
{
- dload_interrupted = 1;
+ size_t hostlen;
+ char *p;
+
+ if(strncmp(url, "file://", 7) == 0) {
+ strcpy(buffer, _("disk"));
+ } else {
+ p = strstr(url, "//");
+ if(!p) {
+ return 1;
+ }
+ p += 2; /* jump over the found // */
+ hostlen = strcspn(p, "/");
+ if(hostlen > 255) {
+ /* buffer overflow imminent */
+ _alpm_log(PM_LOG_ERROR, _("buffer overflow detected"));
+ return 1;
+ }
+ snprintf(buffer, hostlen + 1, "%s", p);
+ }
+
+ return 0;
}
-#define check_stop() if(dload_interrupted) { ret = -1; goto cleanup; }
-enum sighandlers { OLD = 0, NEW = 1 };
+static int utimes_long(const char *path, long time)
+{
+ if(time != -1) {
+ struct timeval tv[2];
+ memset(&tv, 0, sizeof(tv));
+ tv[0].tv_sec = tv[1].tv_sec = time;
+ return utimes(path, tv);
+ }
+ return 0;
+}
-static int download_internal(const char *url, const char *localpath,
- int force) {
+
+static int curl_download_internal(const char *url, const char *localpath,
+ int force, int allow_resume, int errors_ok)
+{
+ int ret = -1;
FILE *localf = NULL;
+ const char *useragent;
+ const char *open_mode = "wb";
+ char *destfile, *tempfile;
+ /* RFC1123 states applications should support this length */
+ char hostname[256];
+ char error_buffer[CURL_ERROR_SIZE];
struct stat st;
- int ret = 0;
- off_t dl_thisfile = 0;
- ssize_t nread = 0;
- char *tempfile, *destfile, *filename;
+ long timecond, remote_time;
+ double remote_size, bytes_dl;
struct sigaction sig_pipe[2], sig_int[2];
+ struct fileinfo dlfile;
- off_t local_size = 0;
- time_t local_time = 0;
-
- struct url *fileurl;
- struct url_stat ust;
- fetchIO *dlf = NULL;
-
- char buffer[PM_DLBUF_LEN];
-
- filename = get_filename(url);
- if(!filename) {
+ dlfile.initial_size = 0.0;
+ dlfile.filename = get_filename(url);
+ if(!dlfile.filename || curl_gethost(url, hostname) != 0) {
_alpm_log(PM_LOG_ERROR, _("url '%s' is invalid\n"), url);
RET_ERR(PM_ERR_SERVER_BAD_URL, -1);
}
- fileurl = fetchParseURL(url);
- if(!fileurl) {
- _alpm_log(PM_LOG_ERROR, _("url '%s' is invalid\n"), url);
- RET_ERR(PM_ERR_LIBFETCH, -1);
+ destfile = get_fullpath(localpath, dlfile.filename, "");
+ tempfile = get_fullpath(localpath, dlfile.filename, ".part");
+ if(!destfile || !tempfile) {
+ goto cleanup;
}
- destfile = get_destfile(localpath, filename);
- tempfile = get_tempfile(localpath, filename);
-
- if(stat(tempfile, &st) == 0 && S_ISREG(st.st_mode) && st.st_size > 0) {
- _alpm_log(PM_LOG_DEBUG, "tempfile found, attempting continuation\n");
- local_time = fileurl->last_modified = st.st_mtime;
- local_size = fileurl->offset = (off_t)st.st_size;
- dl_thisfile = st.st_size;
- localf = fopen(tempfile, "ab");
- } else if(!force && stat(destfile, &st) == 0 && S_ISREG(st.st_mode) && st.st_size > 0) {
- _alpm_log(PM_LOG_DEBUG, "destfile found, using mtime only\n");
- local_time = fileurl->last_modified = st.st_mtime;
- local_size = /* no fu->off here */ (off_t)st.st_size;
- } else {
- _alpm_log(PM_LOG_DEBUG, "no file found matching criteria, starting from scratch\n");
+ error_buffer[0] = '\0';
+
+ /* the curl_easy handle is initialized with the alpm handle, so we only need
+ * to reset the curl handle set parameters for each time it's used. */
+ curl_easy_reset(handle->curl);
+ curl_easy_setopt(handle->curl, CURLOPT_URL, url);
+ curl_easy_setopt(handle->curl, CURLOPT_FAILONERROR, 1L);
+ curl_easy_setopt(handle->curl, CURLOPT_ERRORBUFFER, error_buffer);
+ curl_easy_setopt(handle->curl, CURLOPT_CONNECTTIMEOUT, 10L);
+ curl_easy_setopt(handle->curl, CURLOPT_FILETIME, 1L);
+ curl_easy_setopt(handle->curl, CURLOPT_NOPROGRESS, 0L);
+ curl_easy_setopt(handle->curl, CURLOPT_FOLLOWLOCATION, 1L);
+ curl_easy_setopt(handle->curl, CURLOPT_PROGRESSFUNCTION, curl_progress);
+ curl_easy_setopt(handle->curl, CURLOPT_PROGRESSDATA, (void *)&dlfile);
+
+ useragent = getenv("HTTP_USER_AGENT");
+ if(useragent != NULL) {
+ curl_easy_setopt(handle->curl, CURLOPT_USERAGENT, useragent);
}
- /* pass the raw filename for passing to the callback function */
- _alpm_log(PM_LOG_DEBUG, "using '%s' for download progress\n", filename);
+ /* TODO: no assuming here. the calling function should tell us what's kosher */
+ if(!force && stat(destfile, &st) == 0) {
+ /* assume its a sync, so we're starting from scratch. but, only download
+ * our local is out of date. */
+ curl_easy_setopt(handle->curl, CURLOPT_TIMECONDITION, CURL_TIMECOND_IFMODSINCE);
+ curl_easy_setopt(handle->curl, CURLOPT_TIMEVALUE, (long)st.st_mtime);
+ } else if(stat(tempfile, &st) == 0 && allow_resume) {
+ /* a previous partial download exists, resume from end of file. */
+ open_mode = "ab";
+ curl_easy_setopt(handle->curl, CURLOPT_RESUME_FROM, (long)st.st_size);
+ _alpm_log(PM_LOG_DEBUG, "tempfile found, attempting continuation");
+ dlfile.initial_size = (double)st.st_size;
+ }
- /* print proxy info for debug purposes */
- _alpm_log(PM_LOG_DEBUG, "HTTP_PROXY: %s\n", getenv("HTTP_PROXY"));
- _alpm_log(PM_LOG_DEBUG, "http_proxy: %s\n", getenv("http_proxy"));
- _alpm_log(PM_LOG_DEBUG, "FTP_PROXY: %s\n", getenv("FTP_PROXY"));
- _alpm_log(PM_LOG_DEBUG, "ftp_proxy: %s\n", getenv("ftp_proxy"));
+ localf = fopen(tempfile, open_mode);
+ if(localf == NULL) {
+ goto cleanup;
+ }
- /* 10s timeout */
- fetchTimeout = 10;
+ curl_easy_setopt(handle->curl, CURLOPT_WRITEDATA, localf);
/* ignore any SIGPIPE signals- these may occur if our FTP socket dies or
* something along those lines. Store the old signal handler first. */
@@ -169,168 +236,67 @@ static int download_internal(const char *url, const char *localpath,
sigaction(SIGINT, NULL, &sig_int[OLD]);
sigaction(SIGINT, &sig_int[NEW], NULL);
- /* NOTE: libfetch does not reset the error code, be sure to do it before
- * calls into the library */
-
- /* TODO: if we call fetchStat() and get a redirect (disabling automagic
- * redirect following), we should repeat the file locator stuff and get a new
- * filename rather than only base if off the first URL, and then verify
- * get_filename() didn't return ''. Of course, libfetch might not even allow
- * us to even get that URL...FS#22645. This would allow us to download things
- * without totally puking like
- * http://www.archlinux.org/packages/community/x86_64/exim/download/ */
-
- /* find out the remote size *and* mtime in one go. there is a lot of
- * trouble in trying to do both size and "if-modified-since" logic in a
- * non-stat request, so avoid it. */
- fetchLastErrCode = 0;
- if(fetchStat(fileurl, &ust, "") == -1) {
- pm_errno = PM_ERR_LIBFETCH;
- _alpm_log(PM_LOG_ERROR, _("failed retrieving file '%s' from %s : %s\n"),
- filename, gethost(fileurl), fetchLastErrString);
- ret = -1;
- goto cleanup;
- }
- check_stop();
-
- _alpm_log(PM_LOG_DEBUG, "ust.mtime: %ld local_time: %ld compare: %ld\n",
- ust.mtime, local_time, local_time - ust.mtime);
- _alpm_log(PM_LOG_DEBUG, "ust.size: %jd local_size: %jd compare: %jd\n",
- (intmax_t)ust.size, (intmax_t)local_size, (intmax_t)(local_size - ust.size));
- if(!force && ust.mtime && ust.mtime == local_time
- && ust.size && ust.size == local_size) {
- /* the remote time and size values agreed with what we have, so move on
- * because there is nothing more to do. */
- _alpm_log(PM_LOG_DEBUG, "files are identical, skipping %s\n", filename);
- ret = 1;
- goto cleanup;
- }
- if(!ust.mtime || ust.mtime != local_time) {
- _alpm_log(PM_LOG_DEBUG, "mtimes were different or unavailable, downloading %s from beginning\n", filename);
- fileurl->offset = 0;
- }
+ /* Progress 0 - initialize */
+ prevprogress = 0;
- fetchLastErrCode = 0;
- dlf = fetchGet(fileurl, "");
- check_stop();
+ /* perform transfer */
+ handle->curlerr = curl_easy_perform(handle->curl);
- if(fetchLastErrCode != 0 || dlf == NULL) {
- pm_errno = PM_ERR_LIBFETCH;
- _alpm_log(PM_LOG_ERROR, _("failed retrieving file '%s' from %s : %s\n"),
- filename, gethost(fileurl), fetchLastErrString);
- ret = -1;
+ /* was it a success? */
+ if(handle->curlerr == CURLE_ABORTED_BY_CALLBACK) {
goto cleanup;
- } else {
- _alpm_log(PM_LOG_DEBUG, "connected to %s successfully\n", fileurl->host);
- }
-
- if(localf && fileurl->offset == 0) {
- _alpm_log(PM_LOG_WARNING, _("resuming download of %s not possible; starting over\n"), filename);
- fclose(localf);
- localf = NULL;
- } else if(fileurl->offset) {
- _alpm_log(PM_LOG_DEBUG, "resuming download at position %jd\n", (intmax_t)fileurl->offset);
- }
-
-
- if(localf == NULL) {
- _alpm_rmrf(tempfile);
- fileurl->offset = (off_t)0;
- dl_thisfile = 0;
- localf = fopen(tempfile, "wb");
- if(localf == NULL) { /* still null? */
- pm_errno = PM_ERR_RETRIEVE;
- _alpm_log(PM_LOG_ERROR, _("error writing to file '%s': %s\n"),
- tempfile, strerror(errno));
- ret = -1;
- goto cleanup;
+ } else if(handle->curlerr != CURLE_OK) {
+ if(!errors_ok) {
+ pm_errno = PM_ERR_LIBCURL;
+ _alpm_log(PM_LOG_ERROR, _("failed retrieving file '%s' from %s : %s\n"),
+ dlfile.filename, hostname, error_buffer);
+ } else {
+ _alpm_log(PM_LOG_DEBUG, "failed retrieving file '%s' from %s : %s\n",
+ dlfile.filename, hostname, error_buffer);
}
+ unlink(tempfile);
+ goto cleanup;
}
- /* Progress 0 - initialize */
- if(handle->dlcb) {
- handle->dlcb(filename, 0, ust.size);
- }
-
- while((nread = fetchIO_read(dlf, buffer, PM_DLBUF_LEN)) > 0) {
- check_stop();
- size_t nwritten = 0;
- nwritten = fwrite(buffer, 1, (size_t)nread, localf);
- if((nwritten != (size_t)nread) || ferror(localf)) {
- pm_errno = PM_ERR_RETRIEVE;
- _alpm_log(PM_LOG_ERROR, _("error writing to file '%s': %s\n"),
- tempfile, strerror(errno));
- ret = -1;
- goto cleanup;
- }
- dl_thisfile += nread;
-
- if(handle->dlcb) {
- handle->dlcb(filename, dl_thisfile, ust.size);
- }
- }
+ /* retrieve info about the state of the transfer */
+ curl_easy_getinfo(handle->curl, CURLINFO_FILETIME, &remote_time);
+ curl_easy_getinfo(handle->curl, CURLINFO_CONTENT_LENGTH_DOWNLOAD, &remote_size);
+ curl_easy_getinfo(handle->curl, CURLINFO_SIZE_DOWNLOAD, &bytes_dl);
+ curl_easy_getinfo(handle->curl, CURLINFO_CONDITION_UNMET, &timecond);
- /* did the transfer complete normally? */
- if (nread == -1) {
- /* not PM_ERR_LIBFETCH here because libfetch error string might be empty */
- pm_errno = PM_ERR_RETRIEVE;
- _alpm_log(PM_LOG_ERROR, _("failed retrieving file '%s' from %s\n"),
- filename, gethost(fileurl));
- ret = -1;
+ /* 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)) {
+ ret = 1;
+ unlink(tempfile);
goto cleanup;
}
- if (ust.size != -1 && dl_thisfile < ust.size) {
+ /* 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)) {
pm_errno = PM_ERR_RETRIEVE;
_alpm_log(PM_LOG_ERROR, _("%s appears to be truncated: %jd/%jd bytes\n"),
- filename, (intmax_t)dl_thisfile, (intmax_t)ust.size);
- ret = -1;
+ dlfile.filename, (intmax_t)bytes_dl, (intmax_t)remote_size);
goto cleanup;
}
- /* probably safer to close the file descriptors now before renaming the file,
- * for example to make sure the buffers are flushed.
- */
- fclose(localf);
- localf = NULL;
- fetchIO_close(dlf);
- dlf = NULL;
-
- /* set the times on the file to the same as that of the remote file */
- if(ust.mtime) {
- struct timeval tv[2];
- memset(&tv, 0, sizeof(tv));
- tv[0].tv_sec = ust.atime;
- tv[1].tv_sec = ust.mtime;
- utimes(tempfile, tv);
- }
- if(rename(tempfile, destfile)) {
- _alpm_log(PM_LOG_ERROR, _("could not rename %s to %s (%s)\n"),
- tempfile, destfile, strerror(errno));
- ret = -1;
- }
ret = 0;
cleanup:
- FREE(tempfile);
- FREE(destfile);
if(localf != NULL) {
- /* if we still had a local file open, we got interrupted. set the mtimes on
- * the file accordingly. */
- fflush(localf);
- if(ust.mtime) {
- struct timeval tv[2];
- memset(&tv, 0, sizeof(tv));
- tv[0].tv_sec = ust.atime;
- tv[1].tv_sec = ust.mtime;
- futimes(fileno(localf), tv);
- }
fclose(localf);
+ utimes_long(tempfile, remote_time);
}
- if(dlf != NULL) {
- fetchIO_close(dlf);
+
+ if(ret == 0) {
+ rename(tempfile, destfile);
}
- fetchFreeURL(fileurl);
+
+ FREE(tempfile);
+ FREE(destfile);
/* restore the old signal handlers */
sigaction(SIGINT, &sig_int[OLD], NULL);
@@ -340,86 +306,33 @@ cleanup:
raise(SIGINT);
}
- return(ret);
+ return ret;
}
#endif
-static int download(const char *url, const char *localpath,
- int force) {
+int _alpm_download(const char *url, const char *localpath,
+ int force, int allow_resume, int errors_ok)
+{
if(handle->fetchcb == NULL) {
-#ifdef HAVE_LIBFETCH
- return(download_internal(url, localpath, force));
+#ifdef HAVE_LIBCURL
+ return curl_download_internal(url, localpath, force, allow_resume, errors_ok);
#else
RET_ERR(PM_ERR_EXTERNAL_DOWNLOAD, -1);
#endif
} else {
int ret = handle->fetchcb(url, localpath, force);
- if(ret == -1) {
+ if(ret == -1 && !errors_ok) {
RET_ERR(PM_ERR_EXTERNAL_DOWNLOAD, -1);
}
- return(ret);
- }
-}
-
-/*
- * Download a single file
- * - servers must be a list of urls WITHOUT trailing slashes.
- *
- * RETURN: 0 for successful download
- * 1 if the files are identical
- * -1 on error
- */
-int _alpm_download_single_file(const char *filename,
- alpm_list_t *servers, const char *localpath,
- int force)
-{
- alpm_list_t *i;
- int ret = -1;
-
- ASSERT(servers != NULL, RET_ERR(PM_ERR_SERVER_NONE, -1));
-
- for(i = servers; i; i = i->next) {
- const char *server = i->data;
- char *fileurl = NULL;
- size_t len;
-
- /* print server + filename into a buffer */
- len = strlen(server) + strlen(filename) + 2;
- CALLOC(fileurl, len, sizeof(char), RET_ERR(PM_ERR_MEMORY, -1));
- snprintf(fileurl, len, "%s/%s", server, filename);
-
- ret = download(fileurl, localpath, force);
- FREE(fileurl);
- if(ret != -1) {
- break;
- }
- }
-
- return(ret);
-}
-
-int _alpm_download_files(alpm_list_t *files,
- alpm_list_t *servers, const char *localpath)
-{
- int ret = 0;
- alpm_list_t *lp;
-
- for(lp = files; lp; lp = lp->next) {
- char *filename = lp->data;
- if(_alpm_download_single_file(filename, servers,
- localpath, 0) == -1) {
- ret++;
- }
+ return ret;
}
-
- return(ret);
}
/** Fetch a remote pkg. */
char SYMEXPORT *alpm_fetch_pkgurl(const char *url)
{
- char *filename, *filepath;
- const char *cachedir;
+ char *filepath;
+ const char *filename, *cachedir;
int ret;
ALPM_LOG_FUNC;
@@ -430,16 +343,38 @@ char SYMEXPORT *alpm_fetch_pkgurl(const char *url)
cachedir = _alpm_filecache_setup();
/* download the file */
- ret = download(url, cachedir, 0);
+ ret = _alpm_download(url, cachedir, 0, 1, 0);
if(ret == -1) {
_alpm_log(PM_LOG_WARNING, _("failed to download %s\n"), url);
- return(NULL);
+ return NULL;
}
_alpm_log(PM_LOG_DEBUG, "successfully downloaded %s\n", url);
+ /* attempt to download the signature */
+ if(ret == 0 && (handle->sigverify == PM_PGP_VERIFY_ALWAYS ||
+ handle->sigverify == PM_PGP_VERIFY_OPTIONAL)) {
+ char *sig_url;
+ size_t len;
+ int errors_ok = (handle->sigverify == PM_PGP_VERIFY_OPTIONAL);
+
+ len = strlen(url) + 5;
+ CALLOC(sig_url, len, sizeof(char), RET_ERR(PM_ERR_MEMORY, NULL));
+ snprintf(sig_url, len, "%s.sig", url);
+
+ ret = _alpm_download(sig_url, cachedir, 1, 0, errors_ok);
+ if(ret == -1 && !errors_ok) {
+ _alpm_log(PM_LOG_WARNING, _("failed to download %s\n"), sig_url);
+ /* Warn now, but don't return NULL. We will fail later during package
+ * load time. */
+ } else if(ret == 0) {
+ _alpm_log(PM_LOG_DEBUG, "successfully downloaded %s\n", sig_url);
+ }
+ FREE(sig_url);
+ }
+
/* we should be able to find the file the second time around */
filepath = _alpm_filecache_find(filename);
- return(filepath);
+ return filepath;
}
/* vim: set ts=2 sw=2 noet: */