[pacman-dev] [PATCH] Read .PKGINFO directly from package file
Dan McGee
dan at archlinux.org
Wed Mar 26 22:41:42 EDT 2008
With the addition of the archive_fgets() function, we can now skip the temp
file usage in pkg_load/parse_descfile that was not needed. This has a nice
benefit of probably being both faster, reducing code, and getting rid of
"expensive" file operations.
Signed-off-by: Dan McGee <dan at archlinux.org>
---
lib/libalpm/package.c | 61 +++++++++----------------------------------------
1 files changed, 11 insertions(+), 50 deletions(-)
diff --git a/lib/libalpm/package.c b/lib/libalpm/package.c
index dbe3c98..587e7fc 100644
--- a/lib/libalpm/package.c
+++ b/lib/libalpm/package.c
@@ -889,15 +889,12 @@ int _alpm_pkgname_pkg_cmp(const void *pkgname, const void *package)
}
-/* Parses the package description file for the current package
- * TODO: this should ALL be in a backend interface (be_files), we should
- * be dealing with the abstracted concepts only in this file
+/* 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(const char *descfile, pmpkg_t *info)
+static int parse_descfile(struct archive *a, pmpkg_t *info)
{
- FILE* fp = NULL;
char line[PATH_MAX];
char *ptr = NULL;
char *key = NULL;
@@ -905,13 +902,8 @@ static int parse_descfile(const char *descfile, pmpkg_t *info)
ALPM_LOG_FUNC;
- if((fp = fopen(descfile, "r")) == NULL) {
- _alpm_log(PM_LOG_ERROR, _("could not open file %s: %s\n"), descfile, strerror(errno));
- return(-1);
- }
-
- while(!feof(fp)) {
- fgets(line, PATH_MAX, fp);
+ /* 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] == '#') {
@@ -921,7 +913,7 @@ static int parse_descfile(const char *descfile, pmpkg_t *info)
key = strsep(&ptr, "=");
if(key == NULL || ptr == NULL) {
_alpm_log(PM_LOG_DEBUG, "%s: syntax error in description file line %d\n",
- info->name[0] != '\0' ? info->name : "error", linenum);
+ info->name ? info->name : "error", linenum);
} else {
key = _alpm_strtrim(key);
ptr = _alpm_strtrim(ptr);
@@ -940,7 +932,7 @@ static int parse_descfile(const char *descfile, pmpkg_t *info)
} else if(!strcmp(key, "builddate")) {
char first = tolower(ptr[0]);
if(first > 'a' && first < 'z') {
- struct tm tmp_tm = {0}; //initialize to null incase of failure
+ 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);
@@ -970,13 +962,11 @@ static int parse_descfile(const char *descfile, pmpkg_t *info)
info->backup = alpm_list_add(info->backup, strdup(ptr));
} else {
_alpm_log(PM_LOG_DEBUG, "%s: syntax error in description file line %d\n",
- info->name[0] != '\0' ? info->name : "error", linenum);
+ info->name ? info->name : "error", linenum);
}
}
line[0] = '\0';
}
- fclose(fp);
- unlink(descfile);
return(0);
}
@@ -996,8 +986,6 @@ pmpkg_t *_alpm_pkg_load(const char *pkgfile, unsigned short full)
struct archive *archive;
struct archive_entry *entry;
pmpkg_t *info = NULL;
- char *descfile = NULL;
- int fd = -1;
struct stat st;
ALPM_LOG_FUNC;
@@ -1028,32 +1016,15 @@ pmpkg_t *_alpm_pkg_load(const char *pkgfile, unsigned short full)
info->size = st.st_size;
}
- /* TODO there is no reason to make temp files to read
- * from a libarchive archive, it can be done by reading
- * directly from the archive
- * See: archive_read_data_into_buffer
- * requires changes 'parse_descfile' as well
- * */
-
/* 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);
- /* NOTE: we used to look for .FILELIST, but it is easier (and safer) for
- * us to just generate this on our own. */
if(strcmp(entry_name, ".PKGINFO") == 0) {
- /* extract this file into /tmp. it has info for us */
- descfile = strdup("/tmp/alpm_XXXXXX");
- fd = mkstemp(descfile);
- if(archive_read_data_into_fd(archive, fd) != ARCHIVE_OK) {
- _alpm_log(PM_LOG_ERROR, _("error extracting package description file to %s\n"),
- descfile);
- goto pkg_invalid;
- }
/* parse the info file */
- if(parse_descfile(descfile, info) == -1) {
+ if(parse_descfile(archive, info) != 0) {
_alpm_log(PM_LOG_ERROR, _("could not parse package description file in %s\n"),
pkgfile);
goto pkg_invalid;
@@ -1067,9 +1038,6 @@ pmpkg_t *_alpm_pkg_load(const char *pkgfile, unsigned short full)
goto pkg_invalid;
}
config = 1;
- unlink(descfile);
- FREE(descfile);
- close(fd);
continue;
} else if(strcmp(entry_name, ".INSTALL") == 0) {
info->scriptlet = 1;
@@ -1113,13 +1081,13 @@ pmpkg_t *_alpm_pkg_load(const char *pkgfile, unsigned short full)
info->origin_data.file = strdup(pkgfile);
if(full) {
- /* "checking for conflicts" requires a sorted list, so we ensure that here */
+ /* "checking for conflicts" requires a sorted list, ensure that here */
_alpm_log(PM_LOG_DEBUG, "sorting package filelist for %s\n", 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, as it is invalid */
+ /* get rid of any partial filelist we may have collected, it is invalid */
FREELIST(info->files);
info->infolevel = INFRQ_BASE | INFRQ_DESC | INFRQ_DEPENDS;
}
@@ -1128,13 +1096,6 @@ pmpkg_t *_alpm_pkg_load(const char *pkgfile, unsigned short full)
pkg_invalid:
pm_errno = PM_ERR_PKG_INVALID;
- if(descfile) {
- unlink(descfile);
- FREE(descfile);
- }
- if(fd != -1) {
- close(fd);
- }
error:
_alpm_pkg_free(info);
archive_read_finish(archive);
--
1.5.4.4
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