libutil: add a string list helper to replace some of the adhoc ones

Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>

4 files changed, 26 insertions, 43 deletions

diff --git a/bin/sqfs2tar/src/iterator.c b/bin/sqfs2tar/src/iterator.c
index 42f01e2..7879d61 100644
--- a/bin/sqfs2tar/src/iterator.c
+++ b/bin/sqfs2tar/src/iterator.c
@@ -56,21 +56,21 @@ static bool keep_entry(const sqfs_dir_entry_t *ent)
 {
 	size_t nlen;
 
-	if (num_subdirs == 0)
+	if (subdirs.count == 0)
 		return true;
 
 	nlen = strlen(ent->name);
 
-	for (size_t i = 0; i < num_subdirs; ++i) {
-		size_t plen = strlen(subdirs[i]);
+	for (size_t i = 0; i < subdirs.count; ++i) {
+		size_t plen = strlen(subdirs.strings[i]);
 
 		if (nlen <= plen) {
-			if ((nlen == plen || subdirs[i][nlen] == '/') &&
-			    strncmp(subdirs[i], ent->name, nlen) == 0) {
+			if ((nlen == plen || subdirs.strings[i][nlen] == '/') &&
+			    strncmp(subdirs.strings[i], ent->name, nlen) == 0) {
 				return true;
 			}
 		} else if (ent->name[plen] == '/' &&
-			   strncmp(subdirs[i], ent->name, plen) == 0) {
+			   strncmp(subdirs.strings[i], ent->name, plen) == 0) {
 			return true;
 		}
 	}
@@ -124,8 +124,8 @@ static int next(sqfs_dir_iterator_t *base, sqfs_dir_entry_t **out)
 
 		if (keep_entry(ent)) {
 			/* XXX: skip the entry, but we MUST recurse here! */
-			if (num_subdirs == 1 && !keep_as_dir &&
-			    strlen(ent->name) <= strlen(subdirs[0])) {
+			if (subdirs.count == 1 && !keep_as_dir &&
+			    strlen(ent->name) <= strlen(subdirs.strings[0])) {
 				sqfs_free(ent);
 				continue;
 			}
@@ -138,8 +138,8 @@ static int next(sqfs_dir_iterator_t *base, sqfs_dir_entry_t **out)
 		sqfs_free(ent);
 	}
 
-	if (num_subdirs == 1 && !keep_as_dir) {
-		size_t plen = strlen(subdirs[0]) + 1;
+	if (subdirs.count == 1 && !keep_as_dir) {
+		size_t plen = strlen(subdirs.strings[0]) + 1;
 
 		memmove(ent->name, ent->name + plen,
 			strlen(ent->name + plen) + 1);
diff --git a/bin/sqfs2tar/src/options.c b/bin/sqfs2tar/src/options.c
index ba1588d..82c1d0a 100644
--- a/bin/sqfs2tar/src/options.c
+++ b/bin/sqfs2tar/src/options.c
@@ -70,19 +70,15 @@ bool no_xattr = false;
 bool no_links = false;
 
 char *root_becomes = NULL;
-char **subdirs = NULL;
-size_t num_subdirs = 0;
-static size_t max_subdirs = 0;
+strlist_t subdirs = { 0, 0, 0 };
 int compressor = 0;
 
 const char *filename = NULL;
 
 void process_args(int argc, char **argv)
 {
-	size_t idx, new_count;
 	const char *name;
 	int i, ret;
-	char **new;
 
 	for (;;) {
 		i = getopt_long(argc, argv, short_opts, long_opts, NULL);
@@ -99,27 +95,10 @@ void process_args(int argc, char **argv)
 			}
 			break;
 		case 'd':
-			if (num_subdirs == max_subdirs) {
-				new_count = max_subdirs ? max_subdirs * 2 : 16;
-				new = realloc(subdirs,
-					      new_count * sizeof(subdirs[0]));
-				if (new == NULL)
-					goto fail_errno;
-
-				max_subdirs = new_count;
-				subdirs = new;
-			}
-
-			subdirs[num_subdirs] = strdup(optarg);
-			if (subdirs[num_subdirs] == NULL)
-				goto fail_errno;
-
-			if (canonicalize_name(subdirs[num_subdirs])) {
-				perror(optarg);
+			if (strlist_append(&subdirs, optarg)) {
+				fputs("out-of-memory\n", stderr);
 				goto fail;
 			}
-
-			++num_subdirs;
 			break;
 		case 'r':
 			free(root_becomes);
@@ -175,6 +154,14 @@ void process_args(int argc, char **argv)
 		}
 	}
 
+	for (size_t idx = 0; idx < subdirs.count; ++idx) {
+		if (canonicalize_name(subdirs.strings[idx])) {
+			fprintf(stderr, "Invalid name `%s`\n",
+				subdirs.strings[idx]);
+			goto fail;
+		}
+	}
+
 	if (optind >= argc) {
 		fputs("Missing argument: squashfs image\n", stderr);
 		goto fail_arg;
@@ -187,7 +174,7 @@ void process_args(int argc, char **argv)
 		goto fail_arg;
 	}
 
-	if (num_subdirs > 1)
+	if (subdirs.count > 1)
 		keep_as_dir = true;
 
 	return;
@@ -204,9 +191,7 @@ out_success:
 	ret = EXIT_SUCCESS;
 	goto out_exit;
 out_exit:
-	for (idx = 0; idx < num_subdirs; ++idx)
-		free(subdirs[idx]);
+	strlist_cleanup(&subdirs);
 	free(root_becomes);
-	free(subdirs);
 	exit(ret);
 }
diff --git a/bin/sqfs2tar/src/sqfs2tar.c b/bin/sqfs2tar/src/sqfs2tar.c
index 0f83abf..7404221 100644
--- a/bin/sqfs2tar/src/sqfs2tar.c
+++ b/bin/sqfs2tar/src/sqfs2tar.c
@@ -171,9 +171,7 @@ int main(int argc, char **argv)
 out:
 	sqfs_drop(it);
 	sqfs_drop(out_file);
-	for (i = 0; i < num_subdirs; ++i)
-		free(subdirs[i]);
-	free(subdirs);
+	strlist_cleanup(&subdirs);
 	free(root_becomes);
 	return status;
 }
diff --git a/bin/sqfs2tar/src/sqfs2tar.h b/bin/sqfs2tar/src/sqfs2tar.h
index a1a5927..4c9a8f2 100644
--- a/bin/sqfs2tar/src/sqfs2tar.h
+++ b/bin/sqfs2tar/src/sqfs2tar.h
@@ -11,6 +11,7 @@
 #include "common.h"
 
 #include "util/util.h"
+#include "util/strlist.h"
 #include "tar/tar.h"
 #include "xfrm/compress.h"
 #include "io/xfrm.h"
@@ -30,8 +31,7 @@ extern bool no_xattr;
 extern bool no_links;
 
 extern char *root_becomes;
-extern char **subdirs;
-extern size_t num_subdirs;
+extern strlist_t subdirs;
 extern int compressor;
 
 extern const char *filename;