mirror of
https://github.com/moparisthebest/pacman
synced 2024-12-22 15:58:50 -05:00
687f7b6ba8
It seems that if we pass the permissions that we want the created directory to have, then we should probably use it... Signed-off-by: Allan McRae <allan@archlinux.org> Signed-off-by: Dan McGee <dan@archlinux.org>
1281 lines
32 KiB
C
1281 lines
32 KiB
C
/*
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* util.c
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*
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* Copyright (c) 2006-2012 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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* Copyright (c) 2005 by Aurelien Foret <orelien@chez.com>
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* Copyright (c) 2005 by Christian Hamar <krics@linuxforum.hu>
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* Copyright (c) 2006 by David Kimpe <dnaku@frugalware.org>
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* Copyright (c) 2005, 2006 by Miklos Vajna <vmiklos@frugalware.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 <unistd.h>
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#include <ctype.h>
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#include <dirent.h>
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#include <time.h>
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#include <syslog.h>
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#include <errno.h>
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#include <limits.h>
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#include <sys/wait.h>
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#include <locale.h> /* setlocale */
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#include <fnmatch.h>
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/* libarchive */
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#include <archive.h>
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#include <archive_entry.h>
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#ifdef HAVE_LIBSSL
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#include <openssl/md5.h>
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#include <openssl/sha.h>
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#else
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#include "md5.h"
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#include "sha2.h"
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#endif
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/* libalpm */
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#include "util.h"
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#include "log.h"
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#include "alpm.h"
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#include "alpm_list.h"
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#include "handle.h"
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#include "trans.h"
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#ifndef HAVE_STRSEP
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/** Extracts tokens from a string.
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* Replaces strset which is not portable (missing on Solaris).
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* Copyright (c) 2001 by François Gouget <fgouget_at_codeweavers.com>
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* Modifies str to point to the first character after the token if one is
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* found, or NULL if one is not.
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* @param str string containing delimited tokens to parse
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* @param delim character delimiting tokens in str
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* @return pointer to the first token in str if str is not NULL, NULL if
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* str is NULL
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*/
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char* strsep(char** str, const char* delims)
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{
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char* token;
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if(*str==NULL) {
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/* No more tokens */
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return NULL;
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}
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token=*str;
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while(**str!='\0') {
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if(strchr(delims,**str)!=NULL) {
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**str='\0';
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(*str)++;
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return token;
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}
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(*str)++;
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}
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/* There is no other token */
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*str=NULL;
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return token;
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}
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#endif
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int _alpm_makepath(const char *path)
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{
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return _alpm_makepath_mode(path, 0755);
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}
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/** Creates a directory, including parents if needed, similar to 'mkdir -p'.
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* @param path directory path to create
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* @param mode permission mode for created directories
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* @return 0 on success, 1 on error
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*/
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int _alpm_makepath_mode(const char *path, mode_t mode)
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{
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char *ptr, *str;
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mode_t oldmask;
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int ret = 0;
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STRDUP(str, path, return 1);
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oldmask = umask(0000);
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for(ptr = str; *ptr; ptr++) {
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/* detect mid-path condition and zero length paths */
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if(*ptr != '/' || ptr == str || ptr[-1] == '/') {
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continue;
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}
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/* temporarily mask the end of the path */
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*ptr = '\0';
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if(mkdir(str, mode) < 0 && errno != EEXIST) {
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ret = 1;
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goto done;
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}
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/* restore path separator */
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*ptr = '/';
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}
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/* end of the string. add the full path. It will already exist when the path
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* passed in has a trailing slash. */
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if(mkdir(str, mode) < 0 && errno != EEXIST) {
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ret = 1;
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}
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done:
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umask(oldmask);
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free(str);
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return ret;
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}
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/** Copies a file.
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* @param src file path to copy from
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* @param dest file path to copy to
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* @return 0 on success, 1 on error
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*/
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int _alpm_copyfile(const char *src, const char *dest)
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{
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char *buf;
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int in, out, ret = 1;
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ssize_t nread;
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struct stat st;
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MALLOC(buf, (size_t)ALPM_BUFFER_SIZE, return 1);
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OPEN(in, src, O_RDONLY);
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do {
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out = open(dest, O_WRONLY | O_CREAT, 0000);
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} while(out == -1 && errno == EINTR);
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if(in < 0 || out < 0) {
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goto cleanup;
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}
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if(fstat(in, &st) || fchmod(out, st.st_mode)) {
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goto cleanup;
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}
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/* do the actual file copy */
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while((nread = read(in, buf, ALPM_BUFFER_SIZE)) > 0 || errno == EINTR) {
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ssize_t nwrite = 0;
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if(nread < 0) {
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continue;
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}
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do {
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nwrite = write(out, buf + nwrite, nread);
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if(nwrite >= 0) {
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nread -= nwrite;
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} else if(errno != EINTR) {
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goto cleanup;
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}
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} while(nread > 0);
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}
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ret = 0;
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cleanup:
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free(buf);
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if(in >= 0) {
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CLOSE(in);
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}
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if(out >= 0) {
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CLOSE(out);
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}
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return ret;
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}
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/** Trim trailing newlines from a string (if any exist).
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* @param str a single line of text
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* @return the length of the trimmed string
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*/
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size_t _alpm_strip_newline(char *str)
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{
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size_t len;
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if(*str == '\0') {
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return 0;
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}
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len = strlen(str);
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while(len > 0 && str[len - 1] == '\n') {
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len--;
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}
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str[len] = '\0';
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return len;
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}
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/* Compression functions */
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/** Open an archive for reading and perform the necessary boilerplate.
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* This takes care of creating the libarchive 'archive' struct, setting up
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* compression and format options, opening a file descriptor, setting up the
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* buffer size, and performing a stat on the path once opened.
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* On error, no file descriptor is opened, and the archive pointer returned
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* will be set to NULL.
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* @param handle the context handle
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* @param path the path of the archive to open
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* @param buf space for a stat buffer for the given path
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* @param archive pointer to place the created archive object
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* @param error error code to set on failure to open archive
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* @return -1 on failure, >=0 file descriptor on success
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*/
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int _alpm_open_archive(alpm_handle_t *handle, const char *path,
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struct stat *buf, struct archive **archive, alpm_errno_t error)
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{
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int fd;
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size_t bufsize = ALPM_BUFFER_SIZE;
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errno = 0;
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if((*archive = archive_read_new()) == NULL) {
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RET_ERR(handle, ALPM_ERR_LIBARCHIVE, -1);
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}
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archive_read_support_compression_all(*archive);
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archive_read_support_format_all(*archive);
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_alpm_log(handle, ALPM_LOG_DEBUG, "opening archive %s\n", path);
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OPEN(fd, path, O_RDONLY);
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if(fd < 0) {
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_alpm_log(handle, ALPM_LOG_ERROR,
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_("could not open file %s: %s\n"), path, strerror(errno));
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goto error;
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}
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if(fstat(fd, buf) != 0) {
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_alpm_log(handle, ALPM_LOG_ERROR,
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_("could not stat file %s: %s\n"), path, strerror(errno));
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goto error;
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}
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#ifdef HAVE_STRUCT_STAT_ST_BLKSIZE
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if(buf->st_blksize > ALPM_BUFFER_SIZE) {
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bufsize = buf->st_blksize;
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}
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#endif
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if(archive_read_open_fd(*archive, fd, bufsize) != ARCHIVE_OK) {
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_alpm_log(handle, ALPM_LOG_ERROR, _("could not open file %s: %s\n"),
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path, archive_error_string(*archive));
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goto error;
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}
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return fd;
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error:
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archive_read_finish(*archive);
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*archive = NULL;
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if(fd >= 0) {
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CLOSE(fd);
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}
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RET_ERR(handle, error, -1);
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}
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/** Unpack a specific file in an archive.
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* @param handle the context handle
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* @param archive the archive to unpack
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* @param prefix where to extract the files
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* @param filename a file within the archive to unpack
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* @return 0 on success, 1 on failure
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*/
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int _alpm_unpack_single(alpm_handle_t *handle, const char *archive,
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const char *prefix, const char *filename)
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{
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alpm_list_t *list = NULL;
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int ret = 0;
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if(filename == NULL) {
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return 1;
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}
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list = alpm_list_add(list, (void *)filename);
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ret = _alpm_unpack(handle, archive, prefix, list, 1);
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alpm_list_free(list);
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return ret;
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}
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/** Unpack a list of files in an archive.
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* @param handle the context handle
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* @param path the archive to unpack
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* @param prefix where to extract the files
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* @param list a list of files within the archive to unpack or NULL for all
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* @param breakfirst break after the first entry found
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* @return 0 on success, 1 on failure
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*/
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int _alpm_unpack(alpm_handle_t *handle, const char *path, const char *prefix,
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alpm_list_t *list, int breakfirst)
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{
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int ret = 0;
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mode_t oldmask;
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struct archive *archive;
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struct archive_entry *entry;
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struct stat buf;
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int fd, cwdfd;
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fd = _alpm_open_archive(handle, path, &buf, &archive, ALPM_ERR_PKG_OPEN);
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if(fd < 0) {
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return 1;
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}
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oldmask = umask(0022);
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/* save the cwd so we can restore it later */
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OPEN(cwdfd, ".", O_RDONLY);
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if(cwdfd < 0) {
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_alpm_log(handle, ALPM_LOG_ERROR, _("could not get current working directory\n"));
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}
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/* just in case our cwd was removed in the upgrade operation */
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if(chdir(prefix) != 0) {
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_alpm_log(handle, ALPM_LOG_ERROR, _("could not change directory to %s (%s)\n"),
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prefix, strerror(errno));
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ret = 1;
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goto cleanup;
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}
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while(archive_read_next_header(archive, &entry) == ARCHIVE_OK) {
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const char *entryname;
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mode_t mode;
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entryname = archive_entry_pathname(entry);
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/* If specific files were requested, skip entries that don't match. */
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if(list) {
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char *entry_prefix = strdup(entryname);
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char *p = strstr(entry_prefix,"/");
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if(p) {
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*(p+1) = '\0';
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}
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char *found = alpm_list_find_str(list, entry_prefix);
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free(entry_prefix);
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if(!found) {
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if(archive_read_data_skip(archive) != ARCHIVE_OK) {
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ret = 1;
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goto cleanup;
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}
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continue;
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} else {
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_alpm_log(handle, ALPM_LOG_DEBUG, "extracting: %s\n", entryname);
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}
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}
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mode = archive_entry_mode(entry);
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if(S_ISREG(mode)) {
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archive_entry_set_perm(entry, 0644);
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} else if(S_ISDIR(mode)) {
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archive_entry_set_perm(entry, 0755);
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}
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/* Extract the archive entry. */
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int readret = archive_read_extract(archive, entry, 0);
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if(readret == ARCHIVE_WARN) {
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/* operation succeeded but a non-critical error was encountered */
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_alpm_log(handle, ALPM_LOG_WARNING, _("warning given when extracting %s (%s)\n"),
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entryname, archive_error_string(archive));
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} else if(readret != ARCHIVE_OK) {
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_alpm_log(handle, ALPM_LOG_ERROR, _("could not extract %s (%s)\n"),
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entryname, archive_error_string(archive));
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ret = 1;
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goto cleanup;
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}
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if(breakfirst) {
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break;
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}
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}
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cleanup:
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umask(oldmask);
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archive_read_finish(archive);
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CLOSE(fd);
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if(cwdfd >= 0) {
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if(fchdir(cwdfd) != 0) {
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_alpm_log(handle, ALPM_LOG_ERROR,
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_("could not restore working directory (%s)\n"), strerror(errno));
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}
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CLOSE(cwdfd);
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}
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return ret;
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}
|
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|
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/** Determine if there are files in a directory.
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* @param handle the context handle
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* @param path the full absolute directory path
|
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* @param full_count whether to return an exact count of files
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* @return a file count if full_count is != 0, else >0 if directory has
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* contents, 0 if no contents, and -1 on error
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*/
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ssize_t _alpm_files_in_directory(alpm_handle_t *handle, const char *path,
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int full_count)
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{
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ssize_t files = 0;
|
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struct dirent *ent;
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DIR *dir = opendir(path);
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|
|
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if(!dir) {
|
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if(errno == ENOTDIR) {
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_alpm_log(handle, ALPM_LOG_DEBUG, "%s was not a directory\n", path);
|
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} else {
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_alpm_log(handle, ALPM_LOG_DEBUG, "could not read directory %s\n",
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path);
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}
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return -1;
|
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}
|
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while((ent = readdir(dir)) != NULL) {
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const char *name = ent->d_name;
|
|
|
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if(strcmp(name, ".") == 0 || strcmp(name, "..") == 0) {
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continue;
|
|
}
|
|
|
|
files++;
|
|
|
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if(!full_count) {
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break;
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}
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}
|
|
|
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closedir(dir);
|
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return files;
|
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}
|
|
|
|
/** Write formatted message to log.
|
|
* @param handle the context handle
|
|
* @param format formatted string to write out
|
|
* @param args formatting arguments
|
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* @return 0 or number of characters written on success, vfprintf return value
|
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* on error
|
|
*/
|
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int _alpm_logaction(alpm_handle_t *handle, const char *fmt, va_list args)
|
|
{
|
|
int ret = 0;
|
|
|
|
if(handle->usesyslog) {
|
|
/* we can't use a va_list more than once, so we need to copy it
|
|
* so we can use the original when calling vfprintf below. */
|
|
va_list args_syslog;
|
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va_copy(args_syslog, args);
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|
vsyslog(LOG_WARNING, fmt, args_syslog);
|
|
va_end(args_syslog);
|
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}
|
|
|
|
if(handle->logstream) {
|
|
time_t t;
|
|
struct tm *tm;
|
|
|
|
t = time(NULL);
|
|
tm = localtime(&t);
|
|
|
|
/* Use ISO-8601 date format */
|
|
fprintf(handle->logstream, "[%04d-%02d-%02d %02d:%02d] ",
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|
tm->tm_year+1900, tm->tm_mon+1, tm->tm_mday,
|
|
tm->tm_hour, tm->tm_min);
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|
ret = vfprintf(handle->logstream, fmt, args);
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|
fflush(handle->logstream);
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}
|
|
|
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return ret;
|
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}
|
|
|
|
/** Execute a command with arguments in a chroot.
|
|
* @param handle the context handle
|
|
* @param cmd command to execute
|
|
* @param argv arguments to pass to cmd
|
|
* @return 0 on success, 1 on error
|
|
*/
|
|
int _alpm_run_chroot(alpm_handle_t *handle, const char *cmd, char *const argv[])
|
|
{
|
|
pid_t pid;
|
|
int pipefd[2], cwdfd;
|
|
int retval = 0;
|
|
|
|
/* save the cwd so we can restore it later */
|
|
OPEN(cwdfd, ".", O_RDONLY);
|
|
if(cwdfd < 0) {
|
|
_alpm_log(handle, ALPM_LOG_ERROR, _("could not get current working directory\n"));
|
|
}
|
|
|
|
/* just in case our cwd was removed in the upgrade operation */
|
|
if(chdir(handle->root) != 0) {
|
|
_alpm_log(handle, ALPM_LOG_ERROR, _("could not change directory to %s (%s)\n"),
|
|
handle->root, strerror(errno));
|
|
goto cleanup;
|
|
}
|
|
|
|
_alpm_log(handle, ALPM_LOG_DEBUG, "executing \"%s\" under chroot \"%s\"\n",
|
|
cmd, handle->root);
|
|
|
|
/* Flush open fds before fork() to avoid cloning buffers */
|
|
fflush(NULL);
|
|
|
|
if(pipe(pipefd) == -1) {
|
|
_alpm_log(handle, ALPM_LOG_ERROR, _("could not create pipe (%s)\n"), strerror(errno));
|
|
retval = 1;
|
|
goto cleanup;
|
|
}
|
|
|
|
/* fork- parent and child each have seperate code blocks below */
|
|
pid = fork();
|
|
if(pid == -1) {
|
|
_alpm_log(handle, ALPM_LOG_ERROR, _("could not fork a new process (%s)\n"), strerror(errno));
|
|
retval = 1;
|
|
goto cleanup;
|
|
}
|
|
|
|
if(pid == 0) {
|
|
/* this code runs for the child only (the actual chroot/exec) */
|
|
CLOSE(1);
|
|
CLOSE(2);
|
|
while(dup2(pipefd[1], 1) == -1 && errno == EINTR);
|
|
while(dup2(pipefd[1], 2) == -1 && errno == EINTR);
|
|
CLOSE(pipefd[0]);
|
|
CLOSE(pipefd[1]);
|
|
|
|
/* use fprintf instead of _alpm_log to send output through the parent */
|
|
if(chroot(handle->root) != 0) {
|
|
fprintf(stderr, _("could not change the root directory (%s)\n"), strerror(errno));
|
|
exit(1);
|
|
}
|
|
if(chdir("/") != 0) {
|
|
fprintf(stderr, _("could not change directory to %s (%s)\n"),
|
|
"/", strerror(errno));
|
|
exit(1);
|
|
}
|
|
umask(0022);
|
|
execv(cmd, argv);
|
|
/* execv only returns if there was an error */
|
|
fprintf(stderr, _("call to execv failed (%s)\n"), strerror(errno));
|
|
exit(1);
|
|
} else {
|
|
/* this code runs for the parent only (wait on the child) */
|
|
int status;
|
|
FILE *pipe_file;
|
|
|
|
CLOSE(pipefd[1]);
|
|
pipe_file = fdopen(pipefd[0], "r");
|
|
if(pipe_file == NULL) {
|
|
CLOSE(pipefd[0]);
|
|
retval = 1;
|
|
} else {
|
|
while(!feof(pipe_file)) {
|
|
char line[PATH_MAX];
|
|
if(fgets(line, PATH_MAX, pipe_file) == NULL)
|
|
break;
|
|
alpm_logaction(handle, "%s", line);
|
|
EVENT(handle, ALPM_EVENT_SCRIPTLET_INFO, line, NULL);
|
|
}
|
|
fclose(pipe_file);
|
|
}
|
|
|
|
while(waitpid(pid, &status, 0) == -1) {
|
|
if(errno != EINTR) {
|
|
_alpm_log(handle, ALPM_LOG_ERROR, _("call to waitpid failed (%s)\n"), strerror(errno));
|
|
retval = 1;
|
|
goto cleanup;
|
|
}
|
|
}
|
|
|
|
/* report error from above after the child has exited */
|
|
if(retval != 0) {
|
|
_alpm_log(handle, ALPM_LOG_ERROR, _("could not open pipe (%s)\n"), strerror(errno));
|
|
goto cleanup;
|
|
}
|
|
/* check the return status, make sure it is 0 (success) */
|
|
if(WIFEXITED(status)) {
|
|
_alpm_log(handle, ALPM_LOG_DEBUG, "call to waitpid succeeded\n");
|
|
if(WEXITSTATUS(status) != 0) {
|
|
_alpm_log(handle, ALPM_LOG_ERROR, _("command failed to execute correctly\n"));
|
|
retval = 1;
|
|
}
|
|
}
|
|
}
|
|
|
|
cleanup:
|
|
if(cwdfd >= 0) {
|
|
if(fchdir(cwdfd) != 0) {
|
|
_alpm_log(handle, ALPM_LOG_ERROR,
|
|
_("could not restore working directory (%s)\n"), strerror(errno));
|
|
}
|
|
CLOSE(cwdfd);
|
|
}
|
|
|
|
return retval;
|
|
}
|
|
|
|
/** Run ldconfig in a chroot.
|
|
* @param handle the context handle
|
|
* @return 0 on success, 1 on error
|
|
*/
|
|
int _alpm_ldconfig(alpm_handle_t *handle)
|
|
{
|
|
char line[PATH_MAX];
|
|
|
|
_alpm_log(handle, ALPM_LOG_DEBUG, "running ldconfig\n");
|
|
|
|
snprintf(line, PATH_MAX, "%setc/ld.so.conf", handle->root);
|
|
if(access(line, F_OK) == 0) {
|
|
snprintf(line, PATH_MAX, "%ssbin/ldconfig", handle->root);
|
|
if(access(line, X_OK) == 0) {
|
|
char *argv[] = { "ldconfig", NULL };
|
|
return _alpm_run_chroot(handle, "/sbin/ldconfig", argv);
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/** Helper function for comparing strings using the alpm "compare func"
|
|
* signature.
|
|
* @param s1 first string to be compared
|
|
* @param s2 second string to be compared
|
|
* @return 0 if strings are equal, positive int if first unequal character
|
|
* has a greater value in s1, negative if it has a greater value in s2
|
|
*/
|
|
int _alpm_str_cmp(const void *s1, const void *s2)
|
|
{
|
|
return strcmp(s1, s2);
|
|
}
|
|
|
|
/** Find a filename in a registered alpm cachedir.
|
|
* @param handle the context handle
|
|
* @param filename name of file to find
|
|
* @return malloced path of file, NULL if not found
|
|
*/
|
|
char *_alpm_filecache_find(alpm_handle_t *handle, const char *filename)
|
|
{
|
|
char path[PATH_MAX];
|
|
char *retpath;
|
|
alpm_list_t *i;
|
|
struct stat buf;
|
|
|
|
/* Loop through the cache dirs until we find a matching file */
|
|
for(i = handle->cachedirs; i; i = i->next) {
|
|
snprintf(path, PATH_MAX, "%s%s", (char *)i->data,
|
|
filename);
|
|
if(stat(path, &buf) == 0 && S_ISREG(buf.st_mode)) {
|
|
retpath = strdup(path);
|
|
_alpm_log(handle, ALPM_LOG_DEBUG, "found cached pkg: %s\n", retpath);
|
|
return retpath;
|
|
}
|
|
}
|
|
/* package wasn't found in any cachedir */
|
|
return NULL;
|
|
}
|
|
|
|
/** Check the alpm cachedirs for existance and find a writable one.
|
|
* If no valid cache directory can be found, use /tmp.
|
|
* @param handle the context handle
|
|
* @return pointer to a writable cache directory.
|
|
*/
|
|
const char *_alpm_filecache_setup(alpm_handle_t *handle)
|
|
{
|
|
struct stat buf;
|
|
alpm_list_t *i;
|
|
char *cachedir, *tmpdir;
|
|
|
|
/* Loop through the cache dirs until we find a usable directory */
|
|
for(i = handle->cachedirs; i; i = i->next) {
|
|
cachedir = i->data;
|
|
if(stat(cachedir, &buf) != 0) {
|
|
/* cache directory does not exist.... try creating it */
|
|
_alpm_log(handle, ALPM_LOG_WARNING, _("no %s cache exists, creating...\n"),
|
|
cachedir);
|
|
if(_alpm_makepath(cachedir) == 0) {
|
|
_alpm_log(handle, ALPM_LOG_DEBUG, "using cachedir: %s\n", cachedir);
|
|
return cachedir;
|
|
}
|
|
} else if(!S_ISDIR(buf.st_mode)) {
|
|
_alpm_log(handle, ALPM_LOG_DEBUG,
|
|
"skipping cachedir, not a directory: %s\n", cachedir);
|
|
} else if(_alpm_access(handle, NULL, cachedir, W_OK) != 0) {
|
|
_alpm_log(handle, ALPM_LOG_DEBUG,
|
|
"skipping cachedir, not writable: %s\n", cachedir);
|
|
} else if(!(buf.st_mode & (S_IWUSR | S_IWGRP | S_IWOTH))) {
|
|
_alpm_log(handle, ALPM_LOG_DEBUG,
|
|
"skipping cachedir, no write bits set: %s\n", cachedir);
|
|
} else {
|
|
_alpm_log(handle, ALPM_LOG_DEBUG, "using cachedir: %s\n", cachedir);
|
|
return cachedir;
|
|
}
|
|
}
|
|
|
|
/* we didn't find a valid cache directory. use TMPDIR or /tmp. */
|
|
if((tmpdir = getenv("TMPDIR")) && stat(tmpdir, &buf) && S_ISDIR(buf.st_mode)) {
|
|
/* TMPDIR was good, we can use it */
|
|
} else {
|
|
tmpdir = "/tmp";
|
|
}
|
|
alpm_option_add_cachedir(handle, tmpdir);
|
|
cachedir = handle->cachedirs->prev->data;
|
|
_alpm_log(handle, ALPM_LOG_DEBUG, "using cachedir: %s\n", cachedir);
|
|
_alpm_log(handle, ALPM_LOG_WARNING,
|
|
_("couldn't find or create package cache, using %s instead\n"), cachedir);
|
|
return cachedir;
|
|
}
|
|
|
|
/** lstat wrapper that treats /path/dirsymlink/ the same as /path/dirsymlink.
|
|
* Linux lstat follows POSIX semantics and still performs a dereference on
|
|
* the first, and for uses of lstat in libalpm this is not what we want.
|
|
* @param path path to file to lstat
|
|
* @param buf structure to fill with stat information
|
|
* @return the return code from lstat
|
|
*/
|
|
int _alpm_lstat(const char *path, struct stat *buf)
|
|
{
|
|
int ret;
|
|
size_t len = strlen(path);
|
|
|
|
/* strip the trailing slash if one exists */
|
|
if(len != 0 && path[len - 1] == '/') {
|
|
char *newpath = strdup(path);
|
|
newpath[len - 1] = '\0';
|
|
ret = lstat(newpath, buf);
|
|
free(newpath);
|
|
} else {
|
|
ret = lstat(path, buf);
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
#ifdef HAVE_LIBSSL
|
|
/** Compute the MD5 message digest of a file.
|
|
* @param path file path of file to compute MD5 digest of
|
|
* @param output string to hold computed MD5 digest
|
|
* @return 0 on success, 1 on file open error, 2 on file read error
|
|
*/
|
|
static int md5_file(const char *path, unsigned char output[16])
|
|
{
|
|
MD5_CTX ctx;
|
|
unsigned char *buf;
|
|
ssize_t n;
|
|
int fd;
|
|
|
|
MALLOC(buf, (size_t)ALPM_BUFFER_SIZE, return 1);
|
|
|
|
OPEN(fd, path, O_RDONLY);
|
|
if(fd < 0) {
|
|
free(buf);
|
|
return 1;
|
|
}
|
|
|
|
MD5_Init(&ctx);
|
|
|
|
while((n = read(fd, buf, ALPM_BUFFER_SIZE)) > 0 || errno == EINTR) {
|
|
if(n < 0) {
|
|
continue;
|
|
}
|
|
MD5_Update(&ctx, buf, n);
|
|
}
|
|
|
|
CLOSE(fd);
|
|
free(buf);
|
|
|
|
if(n < 0) {
|
|
return 2;
|
|
}
|
|
|
|
MD5_Final(output, &ctx);
|
|
return 0;
|
|
}
|
|
|
|
/* third param is so we match the PolarSSL definition */
|
|
/** Compute the SHA-224 or SHA-256 message digest of a file.
|
|
* @param path file path of file to compute SHA2 digest of
|
|
* @param output string to hold computed SHA2 digest
|
|
* @param is224 use SHA-224 instead of SHA-256
|
|
* @return 0 on success, 1 on file open error, 2 on file read error
|
|
*/
|
|
static int sha2_file(const char *path, unsigned char output[32], int is224)
|
|
{
|
|
SHA256_CTX ctx;
|
|
unsigned char *buf;
|
|
ssize_t n;
|
|
int fd;
|
|
|
|
MALLOC(buf, (size_t)ALPM_BUFFER_SIZE, return 1);
|
|
|
|
OPEN(fd, path, O_RDONLY);
|
|
if(fd < 0) {
|
|
free(buf);
|
|
return 1;
|
|
}
|
|
|
|
if(is224) {
|
|
SHA224_Init(&ctx);
|
|
} else {
|
|
SHA256_Init(&ctx);
|
|
}
|
|
|
|
while((n = read(fd, buf, ALPM_BUFFER_SIZE)) > 0 || errno == EINTR) {
|
|
if(n < 0) {
|
|
continue;
|
|
}
|
|
if(is224) {
|
|
SHA224_Update(&ctx, buf, n);
|
|
} else {
|
|
SHA256_Update(&ctx, buf, n);
|
|
}
|
|
}
|
|
|
|
CLOSE(fd);
|
|
free(buf);
|
|
|
|
if(n < 0) {
|
|
return 2;
|
|
}
|
|
|
|
if(is224) {
|
|
SHA224_Final(output, &ctx);
|
|
} else {
|
|
SHA256_Final(output, &ctx);
|
|
}
|
|
return 0;
|
|
}
|
|
#endif
|
|
|
|
/** Create a string representing bytes in hexadecimal.
|
|
* @param bytes the bytes to represent in hexadecimal
|
|
* @param size number of bytes to consider
|
|
* @return a NULL terminated string with the hexadecimal representation of
|
|
* bytes or NULL on error. This string must be freed.
|
|
*/
|
|
static char *hex_representation(unsigned char *bytes, size_t size)
|
|
{
|
|
static const char *hex_digits = "0123456789abcdef";
|
|
char *str;
|
|
size_t i;
|
|
|
|
MALLOC(str, 2 * size + 1, return NULL);
|
|
|
|
for (i = 0; i < size; i++) {
|
|
str[2 * i] = hex_digits[bytes[i] >> 4];
|
|
str[2 * i + 1] = hex_digits[bytes[i] & 0x0f];
|
|
}
|
|
|
|
str[2 * size] = '\0';
|
|
|
|
return str;
|
|
}
|
|
|
|
/** Get the md5 sum of file.
|
|
* @param filename name of the file
|
|
* @return the checksum on success, NULL on error
|
|
* @addtogroup alpm_misc
|
|
*/
|
|
char SYMEXPORT *alpm_compute_md5sum(const char *filename)
|
|
{
|
|
unsigned char output[16];
|
|
|
|
ASSERT(filename != NULL, return NULL);
|
|
|
|
/* defined above for OpenSSL, otherwise defined in md5.h */
|
|
if(md5_file(filename, output) > 0) {
|
|
return NULL;
|
|
}
|
|
|
|
return hex_representation(output, 16);
|
|
}
|
|
|
|
/** Get the sha256 sum of file.
|
|
* @param filename name of the file
|
|
* @return the checksum on success, NULL on error
|
|
* @addtogroup alpm_misc
|
|
*/
|
|
char SYMEXPORT *alpm_compute_sha256sum(const char *filename)
|
|
{
|
|
unsigned char output[32];
|
|
|
|
ASSERT(filename != NULL, return NULL);
|
|
|
|
/* defined above for OpenSSL, otherwise defined in sha2.h */
|
|
if(sha2_file(filename, output, 0) > 0) {
|
|
return NULL;
|
|
}
|
|
|
|
return hex_representation(output, 32);
|
|
}
|
|
|
|
/** Calculates a file's MD5 or SHA2 digest and compares it to an expected value.
|
|
* @param filepath path of the file to check
|
|
* @param expected hash value to compare against
|
|
* @param type digest type to use
|
|
* @return 0 if file matches the expected hash, 1 if they do not match, -1 on
|
|
* error
|
|
*/
|
|
int _alpm_test_checksum(const char *filepath, const char *expected,
|
|
enum _alpm_csum type)
|
|
{
|
|
char *computed;
|
|
int ret;
|
|
|
|
if(type == ALPM_CSUM_MD5) {
|
|
computed = alpm_compute_md5sum(filepath);
|
|
} else if(type == ALPM_CSUM_SHA256) {
|
|
computed = alpm_compute_sha256sum(filepath);
|
|
} else {
|
|
return -1;
|
|
}
|
|
|
|
if(expected == NULL || computed == NULL) {
|
|
ret = -1;
|
|
} else if(strcmp(expected, computed) != 0) {
|
|
ret = 1;
|
|
} else {
|
|
ret = 0;
|
|
}
|
|
|
|
FREE(computed);
|
|
return ret;
|
|
}
|
|
|
|
/* Note: does NOT handle sparse files on purpose for speed. */
|
|
/** TODO.
|
|
* Does not handle sparse files on purpose for speed.
|
|
* @param a
|
|
* @param b
|
|
* @return
|
|
*/
|
|
int _alpm_archive_fgets(struct archive *a, struct archive_read_buffer *b)
|
|
{
|
|
/* ensure we start populating our line buffer at the beginning */
|
|
b->line_offset = b->line;
|
|
|
|
while(1) {
|
|
size_t block_remaining;
|
|
char *eol;
|
|
|
|
/* have we processed this entire block? */
|
|
if(b->block + b->block_size == b->block_offset) {
|
|
int64_t offset;
|
|
if(b->ret == ARCHIVE_EOF) {
|
|
/* reached end of archive on the last read, now we are out of data */
|
|
goto cleanup;
|
|
}
|
|
|
|
/* zero-copy - this is the entire next block of data. */
|
|
b->ret = archive_read_data_block(a, (void *)&b->block,
|
|
&b->block_size, &offset);
|
|
b->block_offset = b->block;
|
|
block_remaining = b->block_size;
|
|
|
|
/* error, cleanup */
|
|
if(b->ret < ARCHIVE_OK) {
|
|
goto cleanup;
|
|
}
|
|
} else {
|
|
block_remaining = b->block + b->block_size - b->block_offset;
|
|
}
|
|
|
|
/* look through the block looking for EOL characters */
|
|
eol = memchr(b->block_offset, '\n', block_remaining);
|
|
if(!eol) {
|
|
eol = memchr(b->block_offset, '\0', block_remaining);
|
|
}
|
|
|
|
/* allocate our buffer, or ensure our existing one is big enough */
|
|
if(!b->line) {
|
|
/* set the initial buffer to the read block_size */
|
|
CALLOC(b->line, b->block_size + 1, sizeof(char), b->ret = -ENOMEM; goto cleanup);
|
|
b->line_size = b->block_size + 1;
|
|
b->line_offset = b->line;
|
|
} else {
|
|
/* note: we know eol > b->block_offset and b->line_offset > b->line,
|
|
* so we know the result is unsigned and can fit in size_t */
|
|
size_t new = eol ? (size_t)(eol - b->block_offset) : block_remaining;
|
|
size_t needed = (size_t)((b->line_offset - b->line) + new + 1);
|
|
if(needed > b->max_line_size) {
|
|
b->ret = -ERANGE;
|
|
goto cleanup;
|
|
}
|
|
if(needed > b->line_size) {
|
|
/* need to realloc + copy data to fit total length */
|
|
char *new;
|
|
CALLOC(new, needed, sizeof(char), b->ret = -ENOMEM; goto cleanup);
|
|
memcpy(new, b->line, b->line_size);
|
|
b->line_size = needed;
|
|
b->line_offset = new + (b->line_offset - b->line);
|
|
free(b->line);
|
|
b->line = new;
|
|
}
|
|
}
|
|
|
|
if(eol) {
|
|
size_t len = (size_t)(eol - b->block_offset);
|
|
memcpy(b->line_offset, b->block_offset, len);
|
|
b->line_offset[len] = '\0';
|
|
b->block_offset = eol + 1;
|
|
/* this is the main return point; from here you can read b->line */
|
|
return ARCHIVE_OK;
|
|
} else {
|
|
/* we've looked through the whole block but no newline, copy it */
|
|
size_t len = (size_t)(b->block + b->block_size - b->block_offset);
|
|
memcpy(b->line_offset, b->block_offset, len);
|
|
b->line_offset += len;
|
|
b->block_offset = b->block + b->block_size;
|
|
/* there was no new data, return what is left; saved ARCHIVE_EOF will be
|
|
* returned on next call */
|
|
if(len == 0) {
|
|
b->line_offset[0] = '\0';
|
|
return ARCHIVE_OK;
|
|
}
|
|
}
|
|
}
|
|
|
|
cleanup:
|
|
{
|
|
int ret = b->ret;
|
|
FREE(b->line);
|
|
memset(b, 0, sizeof(struct archive_read_buffer));
|
|
return ret;
|
|
}
|
|
}
|
|
|
|
/** Parse a full package specifier.
|
|
* @param target package specifier to parse, such as: "pacman-4.0.1-2",
|
|
* "pacman-4.01-2/", or "pacman-4.0.1-2/desc"
|
|
* @param name to hold package name
|
|
* @param version to hold package version
|
|
* @param name_hash to hold package name hash
|
|
* @return 0 on success, -1 on error
|
|
*/
|
|
int _alpm_splitname(const char *target, char **name, char **version,
|
|
unsigned long *name_hash)
|
|
{
|
|
/* the format of a db entry is as follows:
|
|
* package-version-rel/
|
|
* package-version-rel/desc (we ignore the filename portion)
|
|
* package name can contain hyphens, so parse from the back- go back
|
|
* two hyphens and we have split the version from the name.
|
|
*/
|
|
const char *pkgver, *end;
|
|
|
|
if(target == NULL) {
|
|
return -1;
|
|
}
|
|
|
|
/* remove anything trailing a '/' */
|
|
end = strchr(target, '/');
|
|
if(!end) {
|
|
end = target + strlen(target);
|
|
}
|
|
|
|
/* do the magic parsing- find the beginning of the version string
|
|
* by doing two iterations of same loop to lop off two hyphens */
|
|
for(pkgver = end - 1; *pkgver && *pkgver != '-'; pkgver--);
|
|
for(pkgver = pkgver - 1; *pkgver && *pkgver != '-'; pkgver--);
|
|
if(*pkgver != '-' || pkgver == target) {
|
|
return -1;
|
|
}
|
|
|
|
/* copy into fields and return */
|
|
if(version) {
|
|
if(*version) {
|
|
FREE(*version);
|
|
}
|
|
/* version actually points to the dash, so need to increment 1 and account
|
|
* for potential end character */
|
|
STRNDUP(*version, pkgver + 1, end - pkgver - 1, return -1);
|
|
}
|
|
|
|
if(name) {
|
|
if(*name) {
|
|
FREE(*name);
|
|
}
|
|
STRNDUP(*name, target, pkgver - target, return -1);
|
|
if(name_hash) {
|
|
*name_hash = _alpm_hash_sdbm(*name);
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/** Hash the given string to an unsigned long value.
|
|
* This is the standard sdbm hashing algorithm.
|
|
* @param str string to hash
|
|
* @return the hash value of the given string
|
|
*/
|
|
unsigned long _alpm_hash_sdbm(const char *str)
|
|
{
|
|
unsigned long hash = 0;
|
|
int c;
|
|
|
|
if(!str) {
|
|
return hash;
|
|
}
|
|
while((c = *str++)) {
|
|
hash = c + hash * 65599;
|
|
}
|
|
|
|
return hash;
|
|
}
|
|
|
|
/** Convert a string to a file offset.
|
|
* This parses bare positive integers only.
|
|
* @param line string to convert
|
|
* @return off_t on success, -1 on error
|
|
*/
|
|
off_t _alpm_strtoofft(const char *line)
|
|
{
|
|
char *end;
|
|
unsigned long long result;
|
|
errno = 0;
|
|
|
|
/* we are trying to parse bare numbers only, no leading anything */
|
|
if(!isdigit((unsigned char)line[0])) {
|
|
return (off_t)-1;
|
|
}
|
|
result = strtoull(line, &end, 10);
|
|
if(result == 0 && end == line) {
|
|
/* line was not a number */
|
|
return (off_t)-1;
|
|
} else if(result == ULLONG_MAX && errno == ERANGE) {
|
|
/* line does not fit in unsigned long long */
|
|
return (off_t)-1;
|
|
} else if(*end) {
|
|
/* line began with a number but has junk left over at the end */
|
|
return (off_t)-1;
|
|
}
|
|
|
|
return (off_t)result;
|
|
}
|
|
|
|
/** Parses a date into an alpm_time_t struct.
|
|
* @param line date to parse
|
|
* @return time struct on success, 0 on error
|
|
*/
|
|
alpm_time_t _alpm_parsedate(const char *line)
|
|
{
|
|
char *end;
|
|
long long result;
|
|
errno = 0;
|
|
|
|
if(isalpha((unsigned char)line[0])) {
|
|
/* initialize to null in case of failure */
|
|
struct tm tmp_tm;
|
|
memset(&tmp_tm, 0, sizeof(struct tm));
|
|
setlocale(LC_TIME, "C");
|
|
strptime(line, "%a %b %e %H:%M:%S %Y", &tmp_tm);
|
|
setlocale(LC_TIME, "");
|
|
return (alpm_time_t)mktime(&tmp_tm);
|
|
}
|
|
|
|
result = strtoll(line, &end, 10);
|
|
if(result == 0 && end == line) {
|
|
/* line was not a number */
|
|
errno = EINVAL;
|
|
return 0;
|
|
} else if(errno == ERANGE) {
|
|
/* line does not fit in long long */
|
|
return 0;
|
|
} else if(*end) {
|
|
/* line began with a number but has junk left over at the end */
|
|
errno = EINVAL;
|
|
return 0;
|
|
}
|
|
|
|
return (alpm_time_t)result;
|
|
}
|
|
|
|
/** Wrapper around access() which takes a dir and file argument
|
|
* separately and generates an appropriate error message.
|
|
* If dir is NULL file will be treated as the whole path.
|
|
* @param handle an alpm handle
|
|
* @param dir directory path ending with and slash
|
|
* @param file filename
|
|
* @param amode access mode as described in access()
|
|
* @return int value returned by access()
|
|
*/
|
|
int _alpm_access(alpm_handle_t *handle, const char *dir, const char *file, int amode)
|
|
{
|
|
size_t len = 0;
|
|
int ret = 0;
|
|
|
|
if(dir) {
|
|
char *check_path;
|
|
|
|
len = strlen(dir) + strlen(file) + 1;
|
|
CALLOC(check_path, len, sizeof(char), RET_ERR(handle, ALPM_ERR_MEMORY, -1));
|
|
snprintf(check_path, len, "%s%s", dir, file);
|
|
|
|
ret = access(check_path, amode);
|
|
free(check_path);
|
|
} else {
|
|
dir = "";
|
|
ret = access(file, amode);
|
|
}
|
|
|
|
if(ret != 0) {
|
|
if(amode & R_OK) {
|
|
_alpm_log(handle, ALPM_LOG_DEBUG, "\"%s%s\" is not readable: %s\n",
|
|
dir, file, strerror(errno));
|
|
}
|
|
if(amode & W_OK) {
|
|
_alpm_log(handle, ALPM_LOG_DEBUG, "\"%s%s\" is not writable: %s\n",
|
|
dir, file, strerror(errno));
|
|
}
|
|
if(amode & X_OK) {
|
|
_alpm_log(handle, ALPM_LOG_DEBUG, "\"%s%s\" is not executable: %s\n",
|
|
dir, file, strerror(errno));
|
|
}
|
|
if(amode == F_OK) {
|
|
_alpm_log(handle, ALPM_LOG_DEBUG, "\"%s%s\" does not exist: %s\n",
|
|
dir, file, strerror(errno));
|
|
}
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
/** Checks whether a string matches a shell wildcard pattern.
|
|
* Wrapper around fnmatch.
|
|
* @param pattern pattern to match aganist
|
|
* @param string string to check against pattern
|
|
* @return 0 if string matches pattern, non-zero if they don't match and on
|
|
* error
|
|
*/
|
|
int _alpm_fnmatch(const void *pattern, const void *string)
|
|
{
|
|
return fnmatch(pattern, string, 0);
|
|
}
|
|
|
|
#ifndef HAVE_STRNDUP
|
|
/* A quick and dirty implementation derived from glibc */
|
|
/** Determines the length of a fixed-size string.
|
|
* @param s string to be measured
|
|
* @param max maximum number of characters to search for the string end
|
|
* @return length of s or max, whichever is smaller
|
|
*/
|
|
static size_t strnlen(const char *s, size_t max)
|
|
{
|
|
register const char *p;
|
|
for(p = s; *p && max--; ++p);
|
|
return (p - s);
|
|
}
|
|
|
|
/** Copies a string.
|
|
* Returned string needs to be freed
|
|
* @param s string to be copied
|
|
* @param n maximum number of characters to copy
|
|
* @return pointer to the new string on success, NULL on error
|
|
*/
|
|
char *strndup(const char *s, size_t n)
|
|
{
|
|
size_t len = strnlen(s, n);
|
|
char *new = (char *) malloc(len + 1);
|
|
|
|
if(new == NULL)
|
|
return NULL;
|
|
|
|
new[len] = '\0';
|
|
return (char *)memcpy(new, s, len);
|
|
}
|
|
#endif
|
|
|
|
/* vim: set ts=2 sw=2 noet: */
|