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-rw-r--r--lib/libalpm/package.c109
1 files changed, 109 insertions, 0 deletions
diff --git a/lib/libalpm/package.c b/lib/libalpm/package.c
index 172456d6..efb54b02 100644
--- a/lib/libalpm/package.c
+++ b/lib/libalpm/package.c
@@ -491,6 +491,115 @@ alpm_list_t SYMEXPORT *alpm_pkg_get_backup(pmpkg_t *pkg)
return pkg->backup;
}
+/**
+ * Open a package changelog for reading. Similar to fopen in functionality,
+ * except that the returned 'file stream' could really be from an archive
+ * as well as from the database.
+ * @param pkg the package to read the changelog of (either file or db)
+ * @return a 'file stream' to the package changelog
+ */
+void SYMEXPORT *alpm_pkg_changelog_open(pmpkg_t *pkg)
+{
+ ALPM_LOG_FUNC;
+
+ /* Sanity checks */
+ ASSERT(handle != NULL, return(NULL));
+ ASSERT(pkg != NULL, return(NULL));
+
+ if(pkg->origin == PKG_FROM_CACHE) {
+ char clfile[PATH_MAX];
+ snprintf(clfile, PATH_MAX, "%s/%s/%s-%s/changelog",
+ alpm_option_get_dbpath(),
+ alpm_db_get_name(handle->db_local),
+ alpm_pkg_get_name(pkg),
+ alpm_pkg_get_version(pkg));
+ return fopen(clfile, "r");
+ } else if(pkg->origin == PKG_FROM_FILE) {
+ struct archive *archive = NULL;
+ struct archive_entry *entry;
+ const char *pkgfile = pkg->origin_data.file;
+ int ret = ARCHIVE_OK;
+
+ if((archive = archive_read_new()) == NULL) {
+ RET_ERR(PM_ERR_LIBARCHIVE_ERROR, 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((ret = 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
+ */
+size_t SYMEXPORT alpm_pkg_changelog_read(void *ptr, size_t size,
+ const pmpkg_t *pkg, const void *fp)
+{
+ size_t ret = 0;
+ if(pkg->origin == PKG_FROM_CACHE) {
+ ret = fread(ptr, 1, size, (FILE*)fp);
+ } else if(pkg->origin == PKG_FROM_FILE) {
+ ret = archive_read_data((struct archive*)fp, ptr, size);
+ }
+ return(ret);
+}
+
+/*
+int SYMEXPORT alpm_pkg_changelog_feof(const pmpkg_t *pkg, void *fp)
+{
+ int ret = 0;
+ if(pkg->origin == PKG_FROM_CACHE) {
+ ret = feof((FILE*)fp);
+ } else if(pkg->origin == PKG_FROM_FILE) {
+ // note: this doesn't quite work, no feof in libarchive
+ ret = archive_read_data((struct archive*)fp, NULL, 0);
+ }
+ return(ret);
+}
+*/
+
+/**
+ * Close a package changelog for reading. Similar to fclose in functionality,
+ * except that the 'file stream' could really be from an archive as well as
+ * from the database.
+ * @param pkg the package that the changelog was read from
+ * @param fp a 'file stream' to the package changelog
+ * @return whether closing the package changelog stream was successful
+ */
+int SYMEXPORT alpm_pkg_changelog_close(const pmpkg_t *pkg, void *fp)
+{
+ int ret = 0;
+ if(pkg->origin == PKG_FROM_CACHE) {
+ ret = fclose((FILE*)fp);
+ } else if(pkg->origin == PKG_FROM_FILE) {
+ ret = archive_read_finish((struct archive *)fp);
+ }
+ return(ret);
+}
+
unsigned short SYMEXPORT alpm_pkg_has_scriptlet(pmpkg_t *pkg)
{
ALPM_LOG_FUNC;