Various tweaks to support building with excessive GCC warning flags

This fixes a bunch of small issues in order to enable a clean
successful build with a crazy number of GCC warning flags. A lot of
these changes are covered by -Wshadow, -Wformat-security, and
-Wstrict-overflow=5.

Signed-off-by: Dan McGee <dan@archlinux.org>

4 files changed, 22 insertions, 14 deletions

diff --git a/lib/libalpm/deps.c b/lib/libalpm/deps.c
index 6069f5e6..98519bd0 100644
--- a/lib/libalpm/deps.c
+++ b/lib/libalpm/deps.c
@@ -158,15 +158,17 @@ alpm_list_t *_alpm_sortbydeps(alpm_handle_t *handle,
 			else if(nextchild->state == -1) {
 				alpm_pkg_t *vertexpkg = vertex->data;
 				alpm_pkg_t *childpkg = nextchild->data;
-				const char *message;
 
 				_alpm_log(handle, ALPM_LOG_WARNING, _("dependency cycle detected:\n"));
 				if(reverse) {
-					message =_("%s will be removed after its %s dependency\n");
+					_alpm_log(handle, ALPM_LOG_WARNING,
+							_("%s will be removed after its %s dependency\n"),
+							vertexpkg->name, childpkg->name);
 				} else {
-					message =_("%s will be installed before its %s dependency\n");
+					_alpm_log(handle, ALPM_LOG_WARNING,
+							_("%s will be installed before its %s dependency\n"),
+							vertexpkg->name, childpkg->name);
 				}
-				_alpm_log(handle, ALPM_LOG_WARNING, message, vertexpkg->name, childpkg->name);
 			}
 		}
 		if(!found) {
diff --git a/lib/libalpm/trans.c b/lib/libalpm/trans.c
index 4309c07e..08f70dd7 100644
--- a/lib/libalpm/trans.c
+++ b/lib/libalpm/trans.c
@@ -276,8 +276,8 @@ static int grep(const char *fn, const char *needle)
 int _alpm_runscriptlet(alpm_handle_t *handle, const char *filepath,
 		const char *script, const char *ver, const char *oldver, int is_archive)
 {
-	char cmdline[PATH_MAX];
-	char *argv[] = { SCRIPTLET_SHELL, "-c", cmdline, NULL };
+	char arg0[64], arg1[3], cmdline[PATH_MAX];
+	char *argv[] = { arg0, arg1, cmdline, NULL };
 	char *tmpdir, *scriptfn = NULL, *scriptpath;
 	int retval = 0;
 	size_t len;
@@ -293,6 +293,9 @@ int _alpm_runscriptlet(alpm_handle_t *handle, const char *filepath,
 		return 0;
 	}
 
+	strcpy(arg0, SCRIPTLET_SHELL);
+	strcpy(arg1, "-c");
+
 	/* create a directory in $root/tmp/ for copying/extracting the scriptlet */
 	len = strlen(handle->root) + strlen("tmp/alpm_XXXXXX") + 1;
 	MALLOC(tmpdir, len, RET_ERR(handle, ALPM_ERR_MEMORY, -1));
diff --git a/lib/libalpm/util.c b/lib/libalpm/util.c
index 22e9e359..a392c773 100644
--- a/lib/libalpm/util.c
+++ b/lib/libalpm/util.c
@@ -621,7 +621,9 @@ int _alpm_ldconfig(alpm_handle_t *handle)
 	if(access(line, F_OK) == 0) {
 		snprintf(line, PATH_MAX, "%ssbin/ldconfig", handle->root);
 		if(access(line, X_OK) == 0) {
-			char *argv[] = { "ldconfig", NULL };
+			char arg0[32];
+			char *argv[] = { arg0, NULL };
+			strcpy(arg0, "ldconfig");
 			return _alpm_run_chroot(handle, "/sbin/ldconfig", argv);
 		}
 	}
@@ -676,7 +678,8 @@ const char *_alpm_filecache_setup(alpm_handle_t *handle)
 {
 	struct stat buf;
 	alpm_list_t *i;
-	char *cachedir, *tmpdir;
+	char *cachedir;
+	const char *tmpdir;
 
 	/* Loop through the cache dirs until we find a usable directory */
 	for(i = handle->cachedirs; i; i = i->next) {
@@ -995,13 +998,13 @@ int _alpm_archive_fgets(struct archive *a, struct archive_read_buffer *b)
 			}
 			if(needed > b->line_size) {
 				/* need to realloc + copy data to fit total length */
-				char *new;
-				CALLOC(new, needed, sizeof(char), b->ret = -ENOMEM; goto cleanup);
-				memcpy(new, b->line, b->line_size);
+				char *new_line;
+				CALLOC(new_line, needed, sizeof(char), b->ret = -ENOMEM; goto cleanup);
+				memcpy(new_line, b->line, b->line_size);
 				b->line_size = needed;
-				b->line_offset = new + (b->line_offset - b->line);
+				b->line_offset = new_line + (b->line_offset - b->line);
 				free(b->line);
-				b->line = new;
+				b->line = new_line;
 			}
 		}
 
diff --git a/lib/libalpm/util.h b/lib/libalpm/util.h
index e6747827..e35e35b9 100644
--- a/lib/libalpm/util.h
+++ b/lib/libalpm/util.h
@@ -87,7 +87,7 @@
 #endif
 
 #define OPEN(fd, path, flags) do { fd = open(path, flags | O_BINARY); } while(fd == -1 && errno == EINTR)
-#define CLOSE(fd) do { int ret; do { ret = close(fd); } while(ret == -1 && errno == EINTR); } while(0)
+#define CLOSE(fd) do { int _ret; do { _ret = close(fd); } while(_ret == -1 && errno == EINTR); } while(0)
 
 /**
  * Used as a buffer/state holder for _alpm_archive_fgets().