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authorDan McGee <dan@archlinux.org>2007-09-27 23:39:37 -0500
committerDan McGee <dan@archlinux.org>2007-09-28 00:16:43 -0500
commit219808714f94788a66a430786c552f60e95b1a01 (patch)
tree6529ca915ad56e1c546f728ed58142b629132da7 /lib/libalpm/package.c
parentd2edcb58e2252f90447694acc7736c0ba5b1f01e (diff)
Add 'full' parameter to alpm_pkg_load
In most cases, we want to fully scan a package when we load it, which serves as a integrity verification check. However, there are times when it is only desired to read the metadata and nothing else, so allow the caller of pkg_load to choose the behavior they need. This pays big dividends in speeding up pacman cache cleaning functionality. Old (729 packages): real 1m43.717s user 1m20.785s sys 0m2.993s New (729 packages): real 0m25.607s user 0m19.389s sys 0m0.543s Signed-off-by: Dan McGee <dan@archlinux.org>
Diffstat (limited to 'lib/libalpm/package.c')
-rw-r--r--lib/libalpm/package.c40
1 files changed, 26 insertions, 14 deletions
diff --git a/lib/libalpm/package.c b/lib/libalpm/package.c
index 30d77a74..96c264ac 100644
--- a/lib/libalpm/package.c
+++ b/lib/libalpm/package.c
@@ -57,10 +57,13 @@
/** 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, pmpkg_t **pkg)
+int SYMEXPORT alpm_pkg_load(const char *filename, unsigned short full,
+ pmpkg_t **pkg)
{
_alpm_log(PM_LOG_FUNCTION, "enter alpm_pkg_load\n");
@@ -69,7 +72,7 @@ int SYMEXPORT alpm_pkg_load(const char *filename, pmpkg_t **pkg)
RET_ERR(PM_ERR_WRONG_ARGS, -1));
ASSERT(pkg != NULL, RET_ERR(PM_ERR_WRONG_ARGS, -1));
- *pkg = _alpm_pkg_load(filename);
+ *pkg = _alpm_pkg_load(filename, full);
if(*pkg == NULL) {
/* pm_errno is set by pkg_load */
return(-1);
@@ -870,13 +873,19 @@ static int parse_descfile(const char *descfile, pmpkg_t *info)
return(0);
}
-pmpkg_t *_alpm_pkg_load(const char *pkgfile)
+
+/**
+ * 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)
{
- char *expath;
int ret = ARCHIVE_OK;
int config = 0;
int filelist = 0;
- int scriptcheck = 0;
struct archive *archive;
struct archive_entry *entry;
pmpkg_t *info = NULL;
@@ -920,9 +929,9 @@ pmpkg_t *_alpm_pkg_load(const char *pkgfile)
* requires changes 'parse_descfile' as well
* */
- /* Read through the entire archive for metadata. We will continue reading
- * even if all metadata is found, to verify the integrity of the archive in
- * full */
+ /* 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. */
while((ret = archive_read_next_header (archive, &entry)) == ARCHIVE_OK) {
const char *entry_name = archive_entry_pathname(entry);
@@ -951,7 +960,6 @@ pmpkg_t *_alpm_pkg_load(const char *pkgfile)
continue;
} else if(strcmp(entry_name, ".INSTALL") == 0) {
info->scriptlet = 1;
- scriptcheck = 1;
} else if(strcmp(entry_name, ".FILELIST") == 0) {
/* Build info->files from the filelist */
FILE *fp;
@@ -983,10 +991,9 @@ pmpkg_t *_alpm_pkg_load(const char *pkgfile)
filelist = 1;
continue;
} else if(*entry_name == '.') {
- /* for now, ignore all files starting with '.' that haven't
- * already been handled (for future possibilities) */
+ /* for now, ignore all files starting with '.' that haven't
+ * already been handled (for future possibilities) */
} else {
- scriptcheck = 1;
/* Keep track of all files so we can generate a filelist later if missing */
all_files = alpm_list_add(all_files, strdup(entry_name));
}
@@ -996,9 +1003,14 @@ pmpkg_t *_alpm_pkg_load(const char *pkgfile)
pm_errno = PM_ERR_LIBARCHIVE_ERROR;
goto error;
}
- expath = NULL;
+
+ /* if we are not doing a full read, see if we have all we need */
+ if(!full && config && filelist) {
+ break;
+ }
}
- if(ret != ARCHIVE_EOF) { /* An error occured */
+
+ if(ret != ARCHIVE_EOF && ret != ARCHIVE_OK) { /* An error occured */
_alpm_log(PM_LOG_ERROR, _("error while reading package: %s\n"), archive_error_string(archive));
pm_errno = PM_ERR_LIBARCHIVE_ERROR;
goto error;