/* * be_package.c * * Copyright (c) 2006-2011 Pacman Development Team <pacman-dev@archlinux.org> * Copyright (c) 2002-2006 by Judd Vinet <jvinet@zeroflux.org> * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program. If not, see <http://www.gnu.org/licenses/>. */ #include "config.h" #include <stdio.h> #include <stdlib.h> #include <string.h> #include <limits.h> #include <errno.h> /* libarchive */ #include <archive.h> #include <archive_entry.h> /* libalpm */ #include "alpm_list.h" #include "util.h" #include "log.h" #include "package.h" #include "deps.h" /* _alpm_splitdep */ /** * Open a package changelog for reading. Similar to fopen in functionality, * except that the returned 'file stream' is from an archive. * @param pkg the package (file) to read the changelog * @return a 'file stream' to the package changelog */ static void *_package_changelog_open(pmpkg_t *pkg) { ALPM_LOG_FUNC; ASSERT(pkg != NULL, return(NULL)); struct archive *archive = NULL; struct archive_entry *entry; const char *pkgfile = pkg->origin_data.file; if((archive = archive_read_new()) == NULL) { RET_ERR(PM_ERR_LIBARCHIVE, NULL); } archive_read_support_compression_all(archive); archive_read_support_format_all(archive); if (archive_read_open_filename(archive, pkgfile, ARCHIVE_DEFAULT_BYTES_PER_BLOCK) != ARCHIVE_OK) { RET_ERR(PM_ERR_PKG_OPEN, NULL); } while(archive_read_next_header(archive, &entry) == ARCHIVE_OK) { const char *entry_name = archive_entry_pathname(entry); if(strcmp(entry_name, ".CHANGELOG") == 0) { return(archive); } } /* we didn't find a changelog */ archive_read_finish(archive); errno = ENOENT; return(NULL); } /** * Read data from an open changelog 'file stream'. Similar to fread in * functionality, this function takes a buffer and amount of data to read. * @param ptr a buffer to fill with raw changelog data * @param size the size of the buffer * @param pkg the package that the changelog is being read from * @param fp a 'file stream' to the package changelog * @return the number of characters read, or 0 if there is no more data */ static size_t _package_changelog_read(void *ptr, size_t size, const pmpkg_t *pkg, const void *fp) { ssize_t sret = archive_read_data((struct archive*)fp, ptr, size); /* Report error (negative values) */ if(sret < 0) { pm_errno = PM_ERR_LIBARCHIVE; return(0); } else { return((size_t)sret); } } /* static int _package_changelog_feof(const pmpkg_t *pkg, void *fp) { // note: this doesn't quite work, no feof in libarchive return( archive_read_data((struct archive*)fp, NULL, 0) ); } */ /** * Close a package changelog for reading. Similar to fclose in functionality, * except that the 'file stream' is from an archive. * @param pkg the package (file) that the changelog was read from * @param fp a 'file stream' to the package changelog * @return whether closing the package changelog stream was successful */ static int _package_changelog_close(const pmpkg_t *pkg, void *fp) { return( archive_read_finish((struct archive *)fp) ); } /** Package file operations struct accessor. We implement this as a method * rather than a static struct as in be_files because we want to reuse the * majority of the default_pkg_ops struct and add only a few operations of * our own on top. */ static struct pkg_operations *get_file_pkg_ops(void) { static struct pkg_operations file_pkg_ops; static int file_pkg_ops_initialized = 0; if(!file_pkg_ops_initialized) { file_pkg_ops = default_pkg_ops; file_pkg_ops.changelog_open = _package_changelog_open; file_pkg_ops.changelog_read = _package_changelog_read; file_pkg_ops.changelog_close = _package_changelog_close; file_pkg_ops_initialized = 1; } return(&file_pkg_ops); } /** * Parses the package description file for a package into a pmpkg_t struct. * @param archive the archive to read from, pointed at the .PKGINFO entry * @param newpkg an empty pmpkg_t struct to fill with package info * * @return 0 on success, 1 on error */ static int parse_descfile(struct archive *a, pmpkg_t *newpkg) { char *ptr = NULL; char *key = NULL; int linenum = 0; struct archive_read_buffer buf; ALPM_LOG_FUNC; memset(&buf, 0, sizeof(buf)); /* 512K for a line length seems reasonable */ buf.max_line_size = 512 * 1024; /* loop until we reach EOF or other error */ while(_alpm_archive_fgets(a, &buf) == ARCHIVE_OK) { char *line = _alpm_strtrim(buf.line); linenum++; if(strlen(line) == 0 || line[0] == '#') { continue; } ptr = line; key = strsep(&ptr, "="); if(key == NULL || ptr == NULL) { _alpm_log(PM_LOG_DEBUG, "%s: syntax error in description file line %d\n", newpkg->name ? newpkg->name : "error", linenum); } else { key = _alpm_strtrim(key); while(*ptr == ' ') ptr++; ptr = _alpm_strtrim(ptr); if(strcmp(key, "pkgname") == 0) { STRDUP(newpkg->name, ptr, RET_ERR(PM_ERR_MEMORY, -1)); newpkg->name_hash = _alpm_hash_sdbm(newpkg->name); } else if(strcmp(key, "pkgbase") == 0) { /* not used atm */ } else if(strcmp(key, "pkgver") == 0) { STRDUP(newpkg->version, ptr, RET_ERR(PM_ERR_MEMORY, -1)); } else if(strcmp(key, "pkgdesc") == 0) { STRDUP(newpkg->desc, ptr, RET_ERR(PM_ERR_MEMORY, -1)); } else if(strcmp(key, "group") == 0) { newpkg->groups = alpm_list_add(newpkg->groups, strdup(ptr)); } else if(strcmp(key, "url") == 0) { STRDUP(newpkg->url, ptr, RET_ERR(PM_ERR_MEMORY, -1)); } else if(strcmp(key, "license") == 0) { newpkg->licenses = alpm_list_add(newpkg->licenses, strdup(ptr)); } else if(strcmp(key, "builddate") == 0) { newpkg->builddate = _alpm_parsedate(ptr); } else if(strcmp(key, "packager") == 0) { STRDUP(newpkg->packager, ptr, RET_ERR(PM_ERR_MEMORY, -1)); } else if(strcmp(key, "arch") == 0) { STRDUP(newpkg->arch, ptr, RET_ERR(PM_ERR_MEMORY, -1)); } else if(strcmp(key, "size") == 0) { /* size in the raw package is uncompressed (installed) size */ newpkg->isize = atol(ptr); } else if(strcmp(key, "depend") == 0) { pmdepend_t *dep = _alpm_splitdep(ptr); newpkg->depends = alpm_list_add(newpkg->depends, dep); } else if(strcmp(key, "optdepend") == 0) { newpkg->optdepends = alpm_list_add(newpkg->optdepends, strdup(ptr)); } else if(strcmp(key, "conflict") == 0) { newpkg->conflicts = alpm_list_add(newpkg->conflicts, strdup(ptr)); } else if(strcmp(key, "replaces") == 0) { newpkg->replaces = alpm_list_add(newpkg->replaces, strdup(ptr)); } else if(strcmp(key, "provides") == 0) { newpkg->provides = alpm_list_add(newpkg->provides, strdup(ptr)); } else if(strcmp(key, "backup") == 0) { newpkg->backup = alpm_list_add(newpkg->backup, strdup(ptr)); } else if(strcmp(key, "force") == 0) { /* deprecated, skip it */ } else if(strcmp(key, "makepkgopt") == 0) { /* not used atm */ } else { _alpm_log(PM_LOG_DEBUG, "%s: unknown key '%s' in description file line %d\n", newpkg->name ? newpkg->name : "error", key, linenum); } } line[0] = '\0'; } return(0); } /** * Load a package and create the corresponding pmpkg_t struct. * @param pkgfile path to the package file * @param full whether to stop the load after metadata is read or continue * through the full archive * @return An information filled pmpkg_t struct */ static pmpkg_t *pkg_load(const char *pkgfile, int full) { int ret = ARCHIVE_OK; int config = 0; struct archive *archive; struct archive_entry *entry; pmpkg_t *newpkg = NULL; struct stat st; ALPM_LOG_FUNC; if(pkgfile == NULL || strlen(pkgfile) == 0) { RET_ERR(PM_ERR_WRONG_ARGS, NULL); } if(stat(pkgfile, &st) != 0) { RET_ERR(PM_ERR_PKG_OPEN, NULL); } if((archive = archive_read_new()) == NULL) { RET_ERR(PM_ERR_LIBARCHIVE, NULL); } archive_read_support_compression_all(archive); archive_read_support_format_all(archive); if (archive_read_open_filename(archive, pkgfile, ARCHIVE_DEFAULT_BYTES_PER_BLOCK) != ARCHIVE_OK) { RET_ERR(PM_ERR_PKG_OPEN, NULL); } newpkg = _alpm_pkg_new(); if(newpkg == NULL) { archive_read_finish(archive); RET_ERR(PM_ERR_MEMORY, NULL); } newpkg->filename = strdup(pkgfile); newpkg->size = st.st_size; _alpm_log(PM_LOG_DEBUG, "starting package load for %s\n", pkgfile); /* If full is false, only read through the archive until we find our needed * metadata. If it is true, read through the entire archive, which serves * as a verfication of integrity and allows us to create the filelist. */ while((ret = archive_read_next_header(archive, &entry)) == ARCHIVE_OK) { const char *entry_name = archive_entry_pathname(entry); if(strcmp(entry_name, ".PKGINFO") == 0) { /* parse the info file */ if(parse_descfile(archive, newpkg) != 0) { _alpm_log(PM_LOG_ERROR, _("could not parse package description file in %s\n"), pkgfile); goto pkg_invalid; } if(newpkg->name == NULL || strlen(newpkg->name) == 0) { _alpm_log(PM_LOG_ERROR, _("missing package name in %s\n"), pkgfile); goto pkg_invalid; } if(newpkg->version == NULL || strlen(newpkg->version) == 0) { _alpm_log(PM_LOG_ERROR, _("missing package version in %s\n"), pkgfile); goto pkg_invalid; } config = 1; continue; } else if(strcmp(entry_name, ".INSTALL") == 0) { newpkg->scriptlet = 1; } else if(*entry_name == '.') { /* for now, ignore all files starting with '.' that haven't * already been handled (for future possibilities) */ } else { /* Keep track of all files for filelist generation */ newpkg->files = alpm_list_add(newpkg->files, strdup(entry_name)); } if(archive_read_data_skip(archive)) { _alpm_log(PM_LOG_ERROR, _("error while reading package %s: %s\n"), pkgfile, archive_error_string(archive)); pm_errno = PM_ERR_LIBARCHIVE; goto error; } /* if we are not doing a full read, see if we have all we need */ if(!full && config) { break; } } if(ret != ARCHIVE_EOF && ret != ARCHIVE_OK) { /* An error occured */ _alpm_log(PM_LOG_ERROR, _("error while reading package %s: %s\n"), pkgfile, archive_error_string(archive)); pm_errno = PM_ERR_LIBARCHIVE; goto error; } if(!config) { _alpm_log(PM_LOG_ERROR, _("missing package metadata in %s\n"), pkgfile); goto pkg_invalid; } archive_read_finish(archive); /* internal fields for package struct */ newpkg->origin = PKG_FROM_FILE; /* TODO eventually kill/move this? */ newpkg->origin_data.file = strdup(pkgfile); newpkg->ops = get_file_pkg_ops(); if(full) { /* "checking for conflicts" requires a sorted list, ensure that here */ _alpm_log(PM_LOG_DEBUG, "sorting package filelist for %s\n", pkgfile); newpkg->files = alpm_list_msort(newpkg->files, alpm_list_count(newpkg->files), _alpm_str_cmp); newpkg->infolevel = INFRQ_ALL; } else { /* get rid of any partial filelist we may have collected, it is invalid */ FREELIST(newpkg->files); newpkg->infolevel = INFRQ_BASE | INFRQ_DESC; } return(newpkg); pkg_invalid: pm_errno = PM_ERR_PKG_INVALID; error: _alpm_pkg_free(newpkg); archive_read_finish(archive); return(NULL); } /** Create a package from a file. * If full is false, the archive is read only until all necessary * metadata is found. If it is true, the entire archive is read, which * serves as a verfication of integrity and the filelist can be created. * @param filename location of the package tarball * @param full whether to stop the load after metadata is read or continue * through the full archive * @param pkg address of the package pointer * @return 0 on success, -1 on error (pm_errno is set accordingly) */ int SYMEXPORT alpm_pkg_load(const char *filename, int full, pmpkg_t **pkg) { ALPM_LOG_FUNC; /* Sanity checks */ ASSERT(filename != NULL && strlen(filename) != 0, RET_ERR(PM_ERR_WRONG_ARGS, -1)); ASSERT(pkg != NULL, RET_ERR(PM_ERR_WRONG_ARGS, -1)); *pkg = pkg_load(filename, full); if(*pkg == NULL) { /* pm_errno is set by pkg_load */ return(-1); } return(0); } /* vim: set ts=2 sw=2 noet: */