Implemented support for working with remote repositories.
libfetch from NetBSD's pkgsrc has been imported into lib/fetch, but the objects are embedded into libxbps. Only a public function to fetch files has been implemented: xbps_fetch_file(). The library now is built with -fvisibility=hidden by default, and exported symbols are the ones that use the SYMEXPORT macro. The code works well enough, but will need many more cleanups. --HG-- extra : convert_revision : xtraeme%40gmail.com-20091027004600-0lq9aao67lisbzxv
This commit is contained in:
Juan RP
269
lib/fetch/file.c
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269
lib/fetch/file.c
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/* $NetBSD: file.c,v 1.15 2009/10/15 12:36:57 joerg Exp $ */
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/*-
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* Copyright (c) 1998-2004 Dag-Erling Coïdan Smørav
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* Copyright (c) 2008, 2009 Joerg Sonnenberger <joerg@NetBSD.org>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer
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* in this position and unchanged.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* $FreeBSD: file.c,v 1.18 2007/12/14 10:26:58 des Exp $
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*/
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#if HAVE_CONFIG_H
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#include "config.h"
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#endif
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#ifndef NETBSD
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#include <nbcompat.h>
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#endif
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#include <sys/stat.h>
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#include <dirent.h>
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#include <fcntl.h>
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#include <fnmatch.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include "fetch.h"
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#include "common.h"
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static int fetch_stat_file(int, struct url_stat *);
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static ssize_t
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fetchFile_read(void *cookie, void *buf, size_t len)
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{
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return read(*(int *)cookie, buf, len);
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}
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static ssize_t
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fetchFile_write(void *cookie, const void *buf, size_t len)
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{
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return write(*(int *)cookie, buf, len);
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}
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static void
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fetchFile_close(void *cookie)
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{
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int fd = *(int *)cookie;
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free(cookie);
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close(fd);
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}
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fetchIO *
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fetchXGetFile(struct url *u, struct url_stat *us, const char *flags)
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{
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char *path;
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fetchIO *f;
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struct url_stat local_us;
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int if_modified_since, fd, *cookie;
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if_modified_since = CHECK_FLAG('i');
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if (if_modified_since && us == NULL)
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us = &local_us;
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if ((path = fetchUnquotePath(u)) == NULL) {
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fetch_syserr();
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return NULL;
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}
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fd = open(path, O_RDONLY);
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free(path);
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if (fd == -1) {
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fetch_syserr();
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return NULL;
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}
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if (us && fetch_stat_file(fd, us) == -1) {
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close(fd);
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fetch_syserr();
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return NULL;
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}
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if (if_modified_since && u->last_modified > 0 &&
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u->last_modified >= us->mtime) {
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close(fd);
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fetchLastErrCode = FETCH_UNCHANGED;
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snprintf(fetchLastErrString, MAXERRSTRING, "Unchanged");
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return NULL;
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}
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if (u->offset && lseek(fd, u->offset, SEEK_SET) == -1) {
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close(fd);
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fetch_syserr();
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return NULL;
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}
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cookie = malloc(sizeof(int));
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if (cookie == NULL) {
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close(fd);
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fetch_syserr();
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return NULL;
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}
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*cookie = fd;
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f = fetchIO_unopen(cookie, fetchFile_read, fetchFile_write, fetchFile_close);
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if (f == NULL) {
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close(fd);
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free(cookie);
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}
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return f;
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}
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fetchIO *
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fetchGetFile(struct url *u, const char *flags)
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{
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return (fetchXGetFile(u, NULL, flags));
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}
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fetchIO *
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fetchPutFile(struct url *u, const char *flags)
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{
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char *path;
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fetchIO *f;
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int fd, *cookie;
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if ((path = fetchUnquotePath(u)) == NULL) {
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fetch_syserr();
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return NULL;
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}
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if (CHECK_FLAG('a'))
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fd = open(path, O_WRONLY | O_APPEND);
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else
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fd = open(path, O_WRONLY);
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free(path);
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if (fd == -1) {
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fetch_syserr();
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return NULL;
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}
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if (u->offset && lseek(fd, u->offset, SEEK_SET) == -1) {
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close(fd);
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fetch_syserr();
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return NULL;
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}
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cookie = malloc(sizeof(int));
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if (cookie == NULL) {
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close(fd);
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fetch_syserr();
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return NULL;
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}
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*cookie = fd;
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f = fetchIO_unopen(cookie, fetchFile_read, fetchFile_write, fetchFile_close);
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if (f == NULL) {
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close(fd);
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free(cookie);
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}
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return f;
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}
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static int
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fetch_stat_file(int fd, struct url_stat *us)
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{
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struct stat sb;
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us->size = -1;
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us->atime = us->mtime = 0;
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if (fstat(fd, &sb) == -1) {
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fetch_syserr();
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return (-1);
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}
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us->size = sb.st_size;
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us->atime = sb.st_atime;
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us->mtime = sb.st_mtime;
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return (0);
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}
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int
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fetchStatFile(struct url *u, struct url_stat *us, const char *flags)
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{
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char *path;
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int fd, rv;
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(void)flags;
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if ((path = fetchUnquotePath(u)) == NULL) {
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fetch_syserr();
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return -1;
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}
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fd = open(path, O_RDONLY);
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free(path);
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if (fd == -1) {
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fetch_syserr();
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return -1;
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}
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rv = fetch_stat_file(fd, us);
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close(fd);
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return rv;
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}
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int
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fetchListFile(struct url_list *ue, struct url *u, const char *pattern, const char *flags)
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{
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char *path;
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struct dirent *de;
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DIR *dir;
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int ret;
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(void)flags;
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if ((path = fetchUnquotePath(u)) == NULL) {
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fetch_syserr();
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return -1;
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}
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dir = opendir(path);
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free(path);
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if (dir == NULL) {
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fetch_syserr();
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return -1;
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}
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ret = 0;
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while ((de = readdir(dir)) != NULL) {
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if (pattern && fnmatch(pattern, de->d_name, 0) != 0)
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continue;
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ret = fetch_add_entry(ue, u, de->d_name, 0);
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if (ret)
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break;
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}
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closedir(dir);
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return ret;
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}
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