From cb09917d64f9b2c20a699db0da97eee4560abd84 Mon Sep 17 00:00:00 2001
From: Patrick McDermott <patrick.mcdermott@libiquity.com>
Date: Sat, 29 Apr 2023 19:03:07 -0400
Subject: opk: Ensure data file names begin with "/"

---
(limited to 'src')

diff --git a/src/opk.c b/src/opk.c
index 62b09f2..3c1c74e 100644
--- a/src/opk.c
+++ b/src/opk.c
@@ -398,9 +398,9 @@ _opkg_opk_opk_read_data(struct opkg_opk_opk *opk)
 	char                         *buffer;
 	size_t                        size;
 	long int                      size_len_max;
-	char                          fmt[28];
-	                              /* "%c%s %-32s/%-32s %11d %s %s" */
-	size_t                        len;
+	char                          fmt[26];
+	                              /* "%c%s %-32s/%-32s %11d %s " */
+	int                           len;
 	char                          mode[10];
 	char                          mtime[20];
 
@@ -502,7 +502,7 @@ _opkg_opk_opk_read_data(struct opkg_opk_opk *opk)
 	}
 	ret = OPKG_OPK_OK;
 	size_len_max = lrint(ceil(log10(size_max)));
-	snprintf(fmt, sizeof(fmt), "%%c%%s %%-%zus/%%-%zus %%%lid %%s %%s",
+	snprintf(fmt, sizeof(fmt), "%%c%%s %%-%zus/%%-%zus %%%lid %%s ",
 			uname_len_max, gname_len_max, size_len_max);
 	len = 34 + uname_len_max + gname_len_max + size_len_max;
 	for (member = head; member != NULL;) {
@@ -525,11 +525,24 @@ _opkg_opk_opk_read_data(struct opkg_opk_opk *opk)
 #pragma GCC diagnostic ignored "-Wformat-nonliteral"
 		if (printf(fmt, member->type, mode,
 				member->uname, member->gname,
-				member->size, mtime, member->name) !=
-				(int) (len + strlen(member->name))) {
+				member->size, mtime) != len) {
 			ret = OPKG_OPK_ERROR;
 		}
 #pragma GCC diagnostic pop
+		/* Print name, ensuring it begins with "/". */
+		if (member->name[0] == '.' && member->name[1] == '/') {
+			if (fputs(member->name + 1, stdout) == EOF) {
+				ret = OPKG_OPK_ERROR;
+			}
+		} else {
+			if (member->name[0] != '/' && putchar('/') == EOF) {
+				ret = OPKG_OPK_ERROR;
+			}
+			if (fputs(member->name, stdout) == EOF) {
+				ret = OPKG_OPK_ERROR;
+			}
+		}
+		/* Print link name, if any. */
 		if (member->type == 'l' && printf(" -> %s", member->linkname) !=
 				(int) (strlen(member->linkname) + 4)) {
 			ret = OPKG_OPK_ERROR;
--
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