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Go Back   Linux Archive > ArchLinux > ArchLinux Pacman Development

 
 
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Old 05-11-2008, 04:40 PM
Dan McGee
 
Default Refactor pkg_load/parse_descfile into a new backend file

alpm_pkg_load() and parse_descfile() are specific to getting information
from package files, just as other code is specific to getting information
into or out of a package database. Move this code out of package.c, which
should eventually only contain operators on the pmpkg_t struct that do not
depend at all on where the data came from.

Signed-off-by: Dan McGee <dan@archlinux.org>
---
lib/libalpm/Makefile.am | 1 +
lib/libalpm/be_package.c | 283 ++++++++++++++++++++++++++++++++++++++++++++++
lib/libalpm/package.c | 244 +---------------------------------------
lib/libalpm/package.h | 1 -
4 files changed, 285 insertions(+), 244 deletions(-)
create mode 100644 lib/libalpm/be_package.c

diff --git a/lib/libalpm/Makefile.am b/lib/libalpm/Makefile.am
index 7b73736..871855e 100644
--- a/lib/libalpm/Makefile.am
+++ b/lib/libalpm/Makefile.am
@@ -26,6 +26,7 @@ libalpm_la_SOURCES =
alpm_list.h alpm_list.c
backup.h backup.c
be_files.c
+ be_package.c
cache.h cache.c
conflict.h conflict.c
db.h db.c
diff --git a/lib/libalpm/be_package.c b/lib/libalpm/be_package.c
new file mode 100644
index 0000000..4df3228
--- /dev/null
+++ b/lib/libalpm/be_package.c
@@ -0,0 +1,283 @@
+/*
+ * be_package.c
+ *
+ * Copyright (c) 2002-2008 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 <ctype.h>
+#include <locale.h> /* setlocale */
+
+/* libarchive */
+#include <archive.h>
+#include <archive_entry.h>
+
+/* libalpm */
+#include "alpm_list.h"
+#include "util.h"
+#include "log.h"
+#include "error.h"
+#include "package.h"
+#include "deps.h" /* _alpm_splitdep */
+
+/**
+ * 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 *info)
+{
+ char line[PATH_MAX];
+ char *ptr = NULL;
+ char *key = NULL;
+ int linenum = 0;
+
+ ALPM_LOG_FUNC;
+
+ /* loop until we reach EOF (where archive_fgets will return NULL) */
+ while(_alpm_archive_fgets(line, PATH_MAX, a) != NULL) {
+ linenum++;
+ _alpm_strtrim(line);
+ 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
",
+ info->name ? info->name : "error", linenum);
+ } else {
+ key = _alpm_strtrim(key);
+ ptr = _alpm_strtrim(ptr);
+ if(!strcmp(key, "pkgname")) {
+ STRDUP(info->name, ptr, RET_ERR(PM_ERR_MEMORY, -1));
+ } else if(!strcmp(key, "pkgver")) {
+ STRDUP(info->version, ptr, RET_ERR(PM_ERR_MEMORY, -1));
+ } else if(!strcmp(key, "pkgdesc")) {
+ STRDUP(info->desc, ptr, RET_ERR(PM_ERR_MEMORY, -1));
+ } else if(!strcmp(key, "group")) {
+ info->groups = alpm_list_add(info->groups, strdup(ptr));
+ } else if(!strcmp(key, "url")) {
+ STRDUP(info->url, ptr, RET_ERR(PM_ERR_MEMORY, -1));
+ } else if(!strcmp(key, "license")) {
+ info->licenses = alpm_list_add(info->licenses, strdup(ptr));
+ } else if(!strcmp(key, "builddate")) {
+ char first = tolower(ptr[0]);
+ if(first > 'a' && first < 'z') {
+ struct tm tmp_tm = {0}; //initialize to null in case of failure
+ setlocale(LC_TIME, "C");
+ strptime(ptr, "%a %b %e %H:%M:%S %Y", &tmp_tm);
+ info->builddate = mktime(&tmp_tm);
+ setlocale(LC_TIME, "");
+ } else {
+ info->builddate = atol(ptr);
+ }
+ } else if(!strcmp(key, "packager")) {
+ STRDUP(info->packager, ptr, RET_ERR(PM_ERR_MEMORY, -1));
+ } else if(!strcmp(key, "arch")) {
+ STRDUP(info->arch, ptr, RET_ERR(PM_ERR_MEMORY, -1));
+ } else if(!strcmp(key, "size")) {
+ /* size in the raw package is uncompressed (installed) size */
+ info->isize = atol(ptr);
+ } else if(!strcmp(key, "depend")) {
+ pmdepend_t *dep = _alpm_splitdep(ptr);
+ info->depends = alpm_list_add(info->depends, dep);
+ } else if(!strcmp(key, "optdepend")) {
+ info->optdepends = alpm_list_add(info->optdepends, strdup(ptr));
+ } else if(!strcmp(key, "conflict")) {
+ info->conflicts = alpm_list_add(info->conflicts, strdup(ptr));
+ } else if(!strcmp(key, "replaces")) {
+ info->replaces = alpm_list_add(info->replaces, strdup(ptr));
+ } else if(!strcmp(key, "provides")) {
+ info->provides = alpm_list_add(info->provides, strdup(ptr));
+ } else if(!strcmp(key, "backup")) {
+ info->backup = alpm_list_add(info->backup, strdup(ptr));
+ } else {
+ _alpm_log(PM_LOG_DEBUG, "%s: syntax error in description file line %d
",
+ info->name ? info->name : "error", linenum);
+ }
+ }
+ line[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, unsigned short full)
+{
+ int ret = ARCHIVE_OK;
+ int config = 0;
+ struct archive *archive;
+ struct archive_entry *entry;
+ pmpkg_t *info = NULL;
+ struct stat st;
+
+ ALPM_LOG_FUNC;
+
+ if(pkgfile == NULL || strlen(pkgfile) == 0) {
+ RET_ERR(PM_ERR_WRONG_ARGS, 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);
+ }
+
+ info = _alpm_pkg_new(NULL, NULL);
+ if(info == NULL) {
+ archive_read_finish(archive);
+ RET_ERR(PM_ERR_MEMORY, NULL);
+ }
+
+ if(stat(pkgfile, &st) == 0) {
+ info->size = st.st_size;
+ }
+
+ /* 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, info) != 0) {
+ _alpm_log(PM_LOG_ERROR, _("could not parse package description file in %s
"),
+ pkgfile);
+ goto pkg_invalid;
+ }
+ if(info->name == NULL || strlen(info->name) == 0) {
+ _alpm_log(PM_LOG_ERROR, _("missing package name in %s
"), pkgfile);
+ goto pkg_invalid;
+ }
+ if(info->version == NULL || strlen(info->version) == 0) {
+ _alpm_log(PM_LOG_ERROR, _("missing package version in %s
"), pkgfile);
+ goto pkg_invalid;
+ }
+ config = 1;
+ continue;
+ } else if(strcmp(entry_name, ".INSTALL") == 0) {
+ info->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 */
+ info->files = alpm_list_add(info->files, strdup(entry_name));
+ }
+
+ if(archive_read_data_skip(archive)) {
+ _alpm_log(PM_LOG_ERROR, _("error while reading package %s: %s
"),
+ 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
"),
+ pkgfile, archive_error_string(archive));
+ pm_errno = PM_ERR_LIBARCHIVE;
+ goto error;
+ }
+
+ if(!config) {
+ _alpm_log(PM_LOG_ERROR, _("missing package metadata in %s
"), pkgfile);
+ goto pkg_invalid;
+ }
+
+ archive_read_finish(archive);
+
+ /* internal fields for package struct */
+ info->origin = PKG_FROM_FILE;
+ info->origin_data.file = strdup(pkgfile);
+
+ if(full) {
+ /* "checking for conflicts" requires a sorted list, ensure that here */
+ _alpm_log(PM_LOG_DEBUG, "sorting package filelist for %s
", pkgfile);
+ info->files = alpm_list_msort(info->files, alpm_list_count(info->files),
+ _alpm_str_cmp);
+ info->infolevel = INFRQ_ALL;
+ } else {
+ /* get rid of any partial filelist we may have collected, it is invalid */
+ FREELIST(info->files);
+ info->infolevel = INFRQ_BASE | INFRQ_DESC | INFRQ_DEPENDS;
+ }
+
+ return(info);
+
+pkg_invalid:
+ pm_errno = PM_ERR_PKG_INVALID;
+error:
+ _alpm_pkg_free(info);
+ archive_read_finish(archive);
+
+ return(NULL);
+}
+
+/** Create a package from a file.
+ * @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, unsigned short 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: */
diff --git a/lib/libalpm/package.c b/lib/libalpm/package.c
index ffaa96b..3989b76 100644
--- a/lib/libalpm/package.c
+++ b/lib/libalpm/package.c
@@ -31,7 +31,6 @@
#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>
-#include <locale.h> /* setlocale */

/* libarchive */
#include <archive.h>
@@ -53,39 +52,13 @@
* @{
*/

-/** Create a package from a file.
- * @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, unsigned short full,
- pmpkg_t **pkg)
-{
- _alpm_log(PM_LOG_FUNCTION, "enter alpm_pkg_load
");
-
- /* 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 = _alpm_pkg_load(filename, full);
- if(*pkg == NULL) {
- /* pm_errno is set by pkg_load */
- return(-1);
- }
-
- return(0);
-}
-
/** Free a package.
* @param pkg package pointer to free
* @return 0 on success, -1 on error (pm_errno is set accordingly)
*/
int SYMEXPORT alpm_pkg_free(pmpkg_t *pkg)
{
- _alpm_log(PM_LOG_FUNCTION, "enter alpm_pkg_free
");
+ ALPM_LOG_FUNC;

ASSERT(pkg != NULL, RET_ERR(PM_ERR_WRONG_ARGS, -1));

@@ -875,221 +848,6 @@ int _alpm_pkgname_pkg_cmp(const void *pkgname, const void *package)
return(strcmp(alpm_pkg_get_name((pmpkg_t *) package), (char *) pkgname));
}

-
-/* Parses the package description file for the current package. This
- * is handed the struct archive when the .PKGINFO file is open.
- * Returns: 0 on success, 1 on error
- */
-static int parse_descfile(struct archive *a, pmpkg_t *info)
-{
- char line[PATH_MAX];
- char *ptr = NULL;
- char *key = NULL;
- int linenum = 0;
-
- ALPM_LOG_FUNC;
-
- /* loop until we reach EOF (where archive_fgets will return NULL) */
- while(_alpm_archive_fgets(line, PATH_MAX, a) != NULL) {
- linenum++;
- _alpm_strtrim(line);
- 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
",
- info->name ? info->name : "error", linenum);
- } else {
- key = _alpm_strtrim(key);
- ptr = _alpm_strtrim(ptr);
- if(!strcmp(key, "pkgname")) {
- STRDUP(info->name, ptr, RET_ERR(PM_ERR_MEMORY, -1));
- } else if(!strcmp(key, "pkgver")) {
- STRDUP(info->version, ptr, RET_ERR(PM_ERR_MEMORY, -1));
- } else if(!strcmp(key, "pkgdesc")) {
- STRDUP(info->desc, ptr, RET_ERR(PM_ERR_MEMORY, -1));
- } else if(!strcmp(key, "group")) {
- info->groups = alpm_list_add(info->groups, strdup(ptr));
- } else if(!strcmp(key, "url")) {
- STRDUP(info->url, ptr, RET_ERR(PM_ERR_MEMORY, -1));
- } else if(!strcmp(key, "license")) {
- info->licenses = alpm_list_add(info->licenses, strdup(ptr));
- } else if(!strcmp(key, "builddate")) {
- char first = tolower(ptr[0]);
- if(first > 'a' && first < 'z') {
- struct tm tmp_tm = {0}; //initialize to null in case of failure
- setlocale(LC_TIME, "C");
- strptime(ptr, "%a %b %e %H:%M:%S %Y", &tmp_tm);
- info->builddate = mktime(&tmp_tm);
- setlocale(LC_TIME, "");
- } else {
- info->builddate = atol(ptr);
- }
- } else if(!strcmp(key, "packager")) {
- STRDUP(info->packager, ptr, RET_ERR(PM_ERR_MEMORY, -1));
- } else if(!strcmp(key, "arch")) {
- STRDUP(info->arch, ptr, RET_ERR(PM_ERR_MEMORY, -1));
- } else if(!strcmp(key, "size")) {
- /* size in the raw package is uncompressed (installed) size */
- info->isize = atol(ptr);
- } else if(!strcmp(key, "depend")) {
- pmdepend_t *dep = _alpm_splitdep(ptr);
- info->depends = alpm_list_add(info->depends, dep);
- } else if(!strcmp(key, "optdepend")) {
- info->optdepends = alpm_list_add(info->optdepends, strdup(ptr));
- } else if(!strcmp(key, "conflict")) {
- info->conflicts = alpm_list_add(info->conflicts, strdup(ptr));
- } else if(!strcmp(key, "replaces")) {
- info->replaces = alpm_list_add(info->replaces, strdup(ptr));
- } else if(!strcmp(key, "provides")) {
- info->provides = alpm_list_add(info->provides, strdup(ptr));
- } else if(!strcmp(key, "backup")) {
- info->backup = alpm_list_add(info->backup, strdup(ptr));
- } else {
- _alpm_log(PM_LOG_DEBUG, "%s: syntax error in description file line %d
",
- info->name ? info->name : "error", linenum);
- }
- }
- line[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
- */
-pmpkg_t *_alpm_pkg_load(const char *pkgfile, unsigned short full)
-{
- int ret = ARCHIVE_OK;
- int config = 0;
- struct archive *archive;
- struct archive_entry *entry;
- pmpkg_t *info = NULL;
- struct stat st;
-
- ALPM_LOG_FUNC;
-
- if(pkgfile == NULL || strlen(pkgfile) == 0) {
- RET_ERR(PM_ERR_WRONG_ARGS, 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);
- }
-
- info = _alpm_pkg_new(NULL, NULL);
- if(info == NULL) {
- archive_read_finish(archive);
- RET_ERR(PM_ERR_MEMORY, NULL);
- }
-
- if(stat(pkgfile, &st) == 0) {
- info->size = st.st_size;
- }
-
- /* 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, info) != 0) {
- _alpm_log(PM_LOG_ERROR, _("could not parse package description file in %s
"),
- pkgfile);
- goto pkg_invalid;
- }
- if(info->name == NULL || strlen(info->name) == 0) {
- _alpm_log(PM_LOG_ERROR, _("missing package name in %s
"), pkgfile);
- goto pkg_invalid;
- }
- if(info->version == NULL || strlen(info->version) == 0) {
- _alpm_log(PM_LOG_ERROR, _("missing package version in %s
"), pkgfile);
- goto pkg_invalid;
- }
- config = 1;
- continue;
- } else if(strcmp(entry_name, ".INSTALL") == 0) {
- info->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 */
- info->files = alpm_list_add(info->files, strdup(entry_name));
- }
-
- if(archive_read_data_skip(archive)) {
- _alpm_log(PM_LOG_ERROR, _("error while reading package %s: %s
"),
- 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
"),
- pkgfile, archive_error_string(archive));
- pm_errno = PM_ERR_LIBARCHIVE;
- goto error;
- }
-
- if(!config) {
- _alpm_log(PM_LOG_ERROR, _("missing package metadata in %s
"), pkgfile);
- goto pkg_invalid;
- }
-
- archive_read_finish(archive);
-
- /* internal fields for package struct */
- info->origin = PKG_FROM_FILE;
- info->origin_data.file = strdup(pkgfile);
-
- if(full) {
- /* "checking for conflicts" requires a sorted list, ensure that here */
- _alpm_log(PM_LOG_DEBUG, "sorting package filelist for %s
", pkgfile);
- info->files = alpm_list_msort(info->files, alpm_list_count(info->files),
- _alpm_str_cmp);
- info->infolevel = INFRQ_ALL;
- } else {
- /* get rid of any partial filelist we may have collected, it is invalid */
- FREELIST(info->files);
- info->infolevel = INFRQ_BASE | INFRQ_DESC | INFRQ_DEPENDS;
- }
-
- return(info);
-
-pkg_invalid:
- pm_errno = PM_ERR_PKG_INVALID;
-error:
- _alpm_pkg_free(info);
- archive_read_finish(archive);
-
- return(NULL);
-}
-
/* Test for existence of a package in a alpm_list_t*
* of pmpkg_t*
*/
diff --git a/lib/libalpm/package.h b/lib/libalpm/package.h
index 0ba8aac..2e4ff31 100644
--- a/lib/libalpm/package.h
+++ b/lib/libalpm/package.h
@@ -81,7 +81,6 @@ void _alpm_pkg_free(pmpkg_t *pkg);
int _alpm_pkg_cmp(const void *p1, const void *p2);
int _alpm_pkgname_pkg_cmp(const void *pkgname, const void *package);
int _alpm_pkg_compare_versions(pmpkg_t *local_pkg, pmpkg_t *pkg);
-pmpkg_t *_alpm_pkg_load(const char *pkgfile, unsigned short full);
pmpkg_t *_alpm_pkg_find(const char *needle, alpm_list_t *haystack);
int _alpm_pkg_should_ignore(pmpkg_t *pkg);

--
1.5.5.1


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