Add format attributes to all required functions

Fixes all clang warnings with -Wformat-literal.

Also, fix genuine formating issue discovered once adding these attributes
and add a cast to prevent a gcc warning.

Signed-off-by: Allan McRae <allan@archlinux.org>

lib/libalpm/alpm.h

@@ -271,8 +271,9 @@ typedef enum _alpm_loglevel_t {
 } alpm_loglevel_t;
 
 typedef void (*alpm_cb_log)(alpm_loglevel_t, const char *, va_list);
+
 int alpm_logaction(alpm_handle_t *handle, const char *prefix,
-		const char *fmt, ...);
+		const char *fmt, ...) __attribute__((format(printf, 3, 4)));
 
 /**
  * Events.

lib/libalpm/log.c

@@ -39,8 +39,8 @@
  * @param fmt output format
  * @return 0 on success, -1 on error (pm_errno is set accordingly)
  */
-int SYMEXPORT alpm_logaction(alpm_handle_t *handle, const char *prefix, const
-		char *fmt, ...)
+int SYMEXPORT alpm_logaction(alpm_handle_t *handle, const char *prefix,
+		const char *fmt, ...)
 {
 	int ret;
 	va_list args;

lib/libalpm/trans.c

@@ -218,8 +218,8 @@ int SYMEXPORT alpm_trans_release(alpm_handle_t *handle)
 		if(_alpm_handle_unlock(handle)) {
 			_alpm_log(handle, ALPM_LOG_WARNING, _("could not remove lock file %s\n"),
 					handle->lockfile);
-			alpm_logaction(handle, "warning: could not remove lock file %s\n",
-					handle->lockfile);
+			alpm_logaction(handle, ALPM_CALLER_PREFIX,
+				"warning: could not remove lock file %s\n", handle->lockfile);
 		}
 	}
 

lib/libalpm/util.h

@@ -120,7 +120,10 @@ int _alpm_unpack(alpm_handle_t *handle, const char *archive, const char *prefix,
 		alpm_list_t *list, int breakfirst);
 
 ssize_t _alpm_files_in_directory(alpm_handle_t *handle, const char *path, int full_count);
-int _alpm_logaction(alpm_handle_t *handle, const char *prefix, const char *fmt, va_list args);
+
+int _alpm_logaction(alpm_handle_t *handle, const char *prefix, const char *fmt, va_list args)
+	__attribute__((format(printf, 3, 0)));
+
 int _alpm_run_chroot(alpm_handle_t *handle, const char *cmd, char *const argv[]);
 int _alpm_ldconfig(alpm_handle_t *handle);
 int _alpm_str_cmp(const void *s1, const void *s2);

src/pacman/callback.h

@@ -41,6 +41,7 @@ void cb_dl_total(off_t total);
 void cb_dl_progress(const char *filename, off_t file_xfered, off_t file_total);
 
 /* callback to handle messages/notifications from pacman library */
+__attribute__((format(printf, 2, 0)))
 void cb_log(alpm_loglevel_t level, const char *fmt, va_list args);
 
 #endif /* _PM_CALLBACK_H */

src/pacman/util.c

@@ -871,7 +871,7 @@ static void _display_targets(alpm_list_t *targets, int verbose)
 	}
 
 	/* print to screen */
-	pm_asprintf(&str, _("Packages (%d):"), alpm_list_count(targets));
+	pm_asprintf(&str, _("Packages (%zd):"), alpm_list_count(targets));
 	printf("\n");
 
 	cols = getcols(fileno(stdout));
@@ -992,7 +992,7 @@ static char *pkg_get_location(alpm_pkg_t *pkg)
 		case PM_OP_SYNC:
 			servers = alpm_db_get_servers(alpm_pkg_get_db(pkg));
 			if(servers) {
-				pm_asprintf(&string, "%s/%s", servers->data,
+				pm_asprintf(&string, "%s/%s", (char *)(servers->data),
 						alpm_pkg_get_filename(pkg));
 				return string;
 			}
@@ -1443,6 +1443,7 @@ int select_question(int count)
 
 
 /* presents a prompt and gets a Y/N answer */
+__attribute__((format(printf, 2, 0)))
 static int question(short preset, char *fmt, va_list args)
 {
 	char response[32];

src/pacman/util.h

@@ -72,11 +72,11 @@ void print_packages(const alpm_list_t *packages);
 void select_display(const alpm_list_t *pkglist);
 int select_question(int count);
 int multiselect_question(char *array, int count);
-int yesno(char *fmt, ...);
-int noyes(char *fmt, ...);
+int yesno(char *fmt, ...) __attribute__((format(printf, 1, 2)));
+int noyes(char *fmt, ...) __attribute__((format(printf, 1, 2)));
 
 int pm_printf(alpm_loglevel_t level, const char *format, ...) __attribute__((format(printf,2,3)));
-int pm_asprintf(char **string, const char *format, ...);
+int pm_asprintf(char **string, const char *format, ...) __attribute__((format(printf,2,3)));
 int pm_vfprintf(FILE *stream, alpm_loglevel_t level, const char *format, va_list args) __attribute__((format(printf,3,0)));
 int pm_vasprintf(char **string, alpm_loglevel_t level, const char *format, va_list args) __attribute__((format(printf,3,0)));
 

src/util/cleanupdelta.c

@@ -37,6 +37,7 @@ static void cleanup(int signum)
 	exit(signum);
 }
 
+__attribute__((format(printf, 2, 0)))
 static void output_cb(alpm_loglevel_t level, const char *fmt, va_list args)
 {
 	if(strlen(fmt)) {

src/util/testdb.c

@@ -40,6 +40,7 @@ static void cleanup(int signum)
 	exit(signum);
 }
 
+__attribute__((format(printf, 2, 0)))
 static void output_cb(alpm_loglevel_t level, const char *fmt, va_list args)
 {
 	if(strlen(fmt)) {

src/util/testpkg.c

@@ -24,6 +24,7 @@
 
 #define BASENAME "testpkg"
 
+__attribute__((format(printf, 2, 0)))
 static void output_cb(alpm_loglevel_t level, const char *fmt, va_list args)
 {
 	if(fmt[0] == '\0') {