Signed-off-by: Dan McGee <dan@archlinux.org> --- lib/libalpm/be_files.c | 61 +++++++++++++++++++++++++++ lib/libalpm/be_package.c | 104 +++++++++++++++++++++++++++++++++++++++++++++- lib/libalpm/package.c | 71 ++----------------------------- 3 files changed, 168 insertions(+), 68 deletions(-) diff --git a/lib/libalpm/be_files.c b/lib/libalpm/be_files.c index c9e708d..485d960 100644 --- a/lib/libalpm/be_files.c +++ b/lib/libalpm/be_files.c @@ -364,6 +364,63 @@ alpm_list_t *_cache_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' is from the database. + * @param pkg the package (from db) to read the changelog + * @return a 'file stream' to the package changelog + */ +void *_cache_changelog_open(pmpkg_t *pkg) +{ + ALPM_LOG_FUNC; + + /* Sanity checks */ + ASSERT(handle != NULL, return(NULL)); + ASSERT(pkg != NULL, return(NULL)); + + 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"); +} + +/** + * 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 _cache_changelog_read(void *ptr, size_t size, + const pmpkg_t *pkg, const void *fp) +{ + return ( fread(ptr, 1, size, (FILE*)fp) ); +} + +/* +int _cache_changelog_feof(const pmpkg_t *pkg, void *fp) +{ + return( feof((FILE*)fp) ); +} +*/ + +/** + * Close a package changelog for reading. Similar to fclose in functionality, + * except that the 'file stream' is 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 _cache_changelog_close(const pmpkg_t *pkg, void *fp) +{ + return( fclose((FILE*)fp) ); +} + /** The sync database operations struct. Get package fields through * lazy accessor methods that handle any backend loading and caching * logic. @@ -422,6 +479,10 @@ static struct pkg_operations local_pkg_ops = { .get_deltas = _cache_get_deltas, .get_files = _cache_get_files, .get_backup = _cache_get_backup, + + .changelog_open = _cache_changelog_open, + .changelog_read = _cache_changelog_read, + .changelog_close = _cache_changelog_close, }; /* diff --git a/lib/libalpm/be_package.c b/lib/libalpm/be_package.c index 93965db..0c8291a 100644 --- a/lib/libalpm/be_package.c +++ b/lib/libalpm/be_package.c @@ -25,6 +25,7 @@ #include <limits.h> #include <ctype.h> #include <locale.h> /* setlocale */ +#include <errno.h> /* libarchive */ #include <archive.h> @@ -39,6 +40,107 @@ #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 + */ +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; + int ret = ARCHIVE_OK; + + 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((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 _package_changelog_read(void *ptr, size_t size, + const pmpkg_t *pkg, const void *fp) +{ + return( archive_read_data((struct archive*)fp, ptr, size) ); +} + +/* +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 + */ +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. The static file_pkg_ops variable inside this function + * lets us only initialize an operations struct once which can always be + * accessed by this method. + */ +static struct pkg_operations *get_file_pkg_ops() +{ + static struct pkg_operations *file_pkg_ops = NULL; + /* determine whether our static file_pkg_ops struct has been initialized */ + if(!file_pkg_ops) { + MALLOC(file_pkg_ops, sizeof(struct pkg_operations), + RET_ERR(PM_ERR_MEMORY, NULL)); + memcpy(file_pkg_ops, &default_pkg_ops, sizeof(struct pkg_operations)); + file_pkg_ops->changelog_open = _package_changelog_open; + file_pkg_ops->changelog_read = _package_changelog_read; + file_pkg_ops->changelog_close = _package_changelog_close; + } + 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 @@ -231,7 +333,7 @@ static pmpkg_t *pkg_load(const char *pkgfile, unsigned short full) newpkg->origin = PKG_FROM_FILE; /* TODO eventually kill/move this? */ newpkg->origin_data.file = strdup(pkgfile); - newpkg->ops = &default_pkg_ops; + newpkg->ops = get_file_pkg_ops(); if(full) { /* "checking for conflicts" requires a sorted list, ensure that here */ diff --git a/lib/libalpm/package.c b/lib/libalpm/package.c index c226a64..1dec422 100644 --- a/lib/libalpm/package.c +++ b/lib/libalpm/package.c @@ -294,51 +294,7 @@ alpm_list_t SYMEXPORT *alpm_pkg_get_backup(pmpkg_t *pkg) */ 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_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, 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; - } else { - 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"); - } - - return(NULL); + return pkg->ops->changelog_open(pkg); } /** @@ -353,26 +309,13 @@ void SYMEXPORT *alpm_pkg_changelog_open(pmpkg_t *pkg) 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_FILE) { - ret = archive_read_data((struct archive*)fp, ptr, size); - } else { - ret = fread(ptr, 1, size, (FILE*)fp); - } - return(ret); + return pkg->ops->changelog_read(ptr, size, pkg, fp); } /* int SYMEXPORT alpm_pkg_changelog_feof(const pmpkg_t *pkg, void *fp) { - int ret = 0; - 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); - } else { - ret = feof((FILE*)fp); - } - return(ret); + return pkg->ops->changelog_feof(pkg, fp); } */ @@ -386,13 +329,7 @@ int SYMEXPORT alpm_pkg_changelog_feof(const pmpkg_t *pkg, void *fp) */ int SYMEXPORT alpm_pkg_changelog_close(const pmpkg_t *pkg, void *fp) { - int ret = 0; - if(pkg->origin == PKG_FROM_FILE) { - ret = archive_read_finish((struct archive *)fp); - } else { - ret = fclose((FILE*)fp); - } - return(ret); + return pkg->ops->changelog_close(pkg, fp); } unsigned short SYMEXPORT alpm_pkg_has_scriptlet(pmpkg_t *pkg) -- 1.5.5.1