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download.c
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/*
* Copyright (c) 2009-2015 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Emile "iMil" Heitor <[email protected]> .
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include "pkgin.h"
#include "external/progressmeter.h"
extern char fetchflags[3];
/*
* Open a pkg_summary and if newer than local return an open libfetch
* connection to it.
*/
Sumfile *
sum_open(char *str_url, time_t *db_mtime)
{
Sumfile *sum = NULL;
fetchIO *f = NULL;
struct url *url;
struct url_stat st;
url = fetchParseURL(str_url);
if (url == NULL || (f = fetchXGet(url, &st, fetchflags)) == NULL)
goto nofetch;
if (st.size == -1) { /* could not obtain file size */
*db_mtime = 0; /* not -1, don't force update */
goto nofetch;
}
if (st.mtime <= *db_mtime) {
/*
* -1 used to identify return type,
* local summary up-to-date
*/
*db_mtime = -1;
goto nofetch;
}
*db_mtime = st.mtime;
/* st.size is an off_t, it will be > SSIZE_MAX on 32 bits systems */
if (sizeof(st.size) == sizeof(SSIZE_MAX) && st.size > SSIZE_MAX - 1)
err(EXIT_FAILURE, "file is too large");
sum = xmalloc(sizeof(Sumfile));
sum->fd = f;
sum->url = url;
sum->size = st.size;
sum->pos = 0;
goto out;
nofetch:
if (url)
fetchFreeURL(url);
if (f)
fetchIO_close(f);
out:
return sum;
}
/*
* archive_read_open open callback. As we already have an open
* libfetch handler all we need to do is print the download messages.
*/
int
sum_start(struct archive *a, void *data)
{
Sumfile *sum = data;
char *p;
if ((p = strrchr(sum->url->doc, '/')) != NULL)
p++;
else
p = (char *)sum->url->doc; /* should not happen */
if (parsable)
printf("downloading %s", p);
else {
printf("downloading %s: 0%%", p);
fflush(stdout);
start_progress_meter(p, sum->size, &sum->pos);
}
return ARCHIVE_OK;
}
/*
* archive_read_open read callback. Read the next chunk of data from libfetch
* and update the read position for the progress meter.
*/
ssize_t
sum_read(struct archive *a, void *data, const void **buf)
{
Sumfile *sum = data;
ssize_t fetched;
*buf = sum->buf;
fetched = fetchIO_read(sum->fd, sum->buf, sizeof(sum->buf));
if (fetched == -1)
errx(EXIT_FAILURE, "failure during fetch of file: %s",
fetchLastErrString);
sum->pos += fetched;
return fetched;
}
/*
* archive_read_open close callback. Stop the progress meter and close the
* libfetch handler.
*/
int
sum_close(struct archive *a, void *data)
{
Sumfile *sum = data;
if (parsable)
printf(" done.\n");
else
stop_progress_meter();
fetchIO_close(sum->fd);
fetchFreeURL(sum->url);
XFREE(sum);
return ARCHIVE_OK;
}
/*
* Download a package to the local cache.
*/
off_t
download_pkg(char *pkg_url, FILE *fp, int cur, int total)
{
struct url_stat st;
size_t size, wrote;
ssize_t fetched;
off_t statsize = 0, written = 0;
struct url *url;
fetchIO *f = NULL;
char buf[4096];
char *pkg, *ptr, *msg;
if ((url = fetchParseURL(pkg_url)) == NULL)
errx(EXIT_FAILURE, "%s: parse failure", pkg_url);
if ((f = fetchXGet(url, &st, fetchflags)) == NULL) {
fprintf(stderr, "download error: %s %s\n", pkg_url,
fetchLastErrString);
fetchFreeURL(url);
return -1;
}
fetchFreeURL(url);
if ((pkg = strrchr(pkg_url, '/')) != NULL)
pkg++;
else
pkg = (char *)pkg_url; /* should not happen */
if (parsable) {
printf("[%d/%d] downloading %s", cur, total, pkg);
} else {
msg = xasprintf("[%d/%d] %s", cur, total, pkg);
fflush(stdout);
start_progress_meter(msg, st.size, &statsize);
}
while (written < st.size) {
if ((fetched = fetchIO_read(f, buf, sizeof(buf))) == 0)
break;
if (fetched < 0 && errno == EINTR)
continue;
if (fetched < 0) {
fprintf(stderr, "download error: %s",
fetchLastErrString);
return -1;
}
statsize += fetched;
size = (size_t)fetched;
for (ptr = buf; size > 0; ptr += wrote, size -= wrote) {
if ((wrote = fwrite(ptr, 1, size, fp)) < size) {
if (ferror(fp) && errno == EINTR)
clearerr(fp);
else
break;
}
written += (off_t)wrote;
}
}
if (parsable)
printf(" done.\n");
else {
stop_progress_meter();
free(msg);
}
fetchIO_close(f);
if (written != st.size) {
fprintf(stderr, "download error: %s truncated\n", pkg_url);
return -1;
}
return written;
}