From 0f96542e7c0f0555b2b2ef7ac52c574a616fa7b2 Mon Sep 17 00:00:00 2001
From: Patrick McDermott <patrick.mcdermott@libiquity.com>
Date: Mon, 17 Apr 2023 10:44:37 -0400
Subject: ustar: Search for multiple member names

---
diff --git a/TODO b/TODO
index 0003f4d..95eefcf 100644
--- a/TODO
+++ b/TODO
@@ -1,4 +1,3 @@
-Make `opkg_opk_ustar_seek()` accept a (varargs) list of possible member names
 Add missing ustar member fields
 Add option handling
 I18n?
diff --git a/src/main.c b/src/main.c
index d2f513b..d400934 100644
--- a/src/main.c
+++ b/src/main.c
@@ -76,7 +76,7 @@ _opkg_opk_main_extract(const char *file_name, const char *outer_member,
 		goto error2;
 	}
 
-	if (opkg_opk_ustar_seek(outer_ustar, outer_member) != OPKG_OPK_OK) {
+	if (opkg_opk_ustar_seek(outer_ustar, 1, outer_member) != OPKG_OPK_OK) {
 		fprintf(stderr, "Error: Failed to find \"%s\" in archive\n",
 				outer_member);
 		goto error3;
@@ -128,7 +128,8 @@ _opkg_opk_main_read_control(struct opkg_opk_ustar *ustar)
 	size_t  size;
 	int     ret;
 
-	if (opkg_opk_ustar_seek(ustar, "./control") != OPKG_OPK_OK) {
+	if (opkg_opk_ustar_seek(ustar, 2, "control", "./control") !=
+			OPKG_OPK_OK) {
 		fputs("Error: Failed to find control file\n", stderr);
 		return OPKG_OPK_ERROR;
 	}
diff --git a/src/ustar.c b/src/ustar.c
index 21d41eb..d728cf5 100644
--- a/src/ustar.c
+++ b/src/ustar.c
@@ -17,6 +17,7 @@
  * along with opkg-opk.  If not, see <http://www.gnu.org/licenses/>.
  */
 
+#include <stdarg.h>
 #include <stdint.h>
 #include <stdio.h>
 #include <stdlib.h>
@@ -128,10 +129,13 @@ opkg_opk_ustar_list(struct opkg_opk_ustar *ustar,
 }
 
 int
-opkg_opk_ustar_seek(struct opkg_opk_ustar *ustar, const char *member)
+opkg_opk_ustar_seek(struct opkg_opk_ustar *ustar, int num_keys, ...)
 {
 	static struct _opkg_opk_ustar_header  header;
 	static unsigned char                  name[OPKG_OPK_USTAR_NAME_MAX_LEN];
+	       va_list                        ap;
+	       int                            key;
+	       const char                    *member;
 
 	for (;;) {
 		if (_opkg_opk_ustar_next(ustar, &header) != OPKG_OPK_OK) {
@@ -146,9 +150,14 @@ opkg_opk_ustar_seek(struct opkg_opk_ustar *ustar, const char *member)
 			name[sizeof(header.name)] = '\0';
 		}
 
-		if (strcmp((char *) name, member) == 0) {
-			return OPKG_OPK_OK;  /* Member found */
+		va_start(ap, num_keys);
+		for (key = 0; key < num_keys; ++key) {
+			member = va_arg(ap, const char *);
+			if (strcmp((char *) name, member) == 0) {
+				return OPKG_OPK_OK;  /* Member found */
+			}
 		}
+		va_end(ap);
 
 		while (ustar->data_size_remaining > 0) {
 			if (opkg_opk_ustar_read(ustar, NULL, NULL) ==
diff --git a/src/ustar.h b/src/ustar.h
index d199063..de782b8 100644
--- a/src/ustar.h
+++ b/src/ustar.h
@@ -38,7 +38,7 @@ opkg_opk_ustar_list(struct opkg_opk_ustar *ustar,
 		struct opkg_opk_ustar_member *member);
 
 int
-opkg_opk_ustar_seek(struct opkg_opk_ustar *ustar, const char *member);
+opkg_opk_ustar_seek(struct opkg_opk_ustar *ustar, int num_keys, ...);
 
 int
 opkg_opk_ustar_read(struct opkg_opk_ustar *ustar, char **buffer, size_t *size);
--
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