gentoo-overlay/net-ftp/tlswrap/files/fix-Wformat-security-warnings.patch

From dbbc4b17b5fdd08b11b0f285cfc99a28be8a89e5 Mon Sep 17 00:00:00 2001
From: Michael Orlitzky <michael@orlitzky.com>
Date: Thu, 11 Aug 2016 13:05:43 -0400
Subject: [PATCH 3/3] Fix -Wformat-security warnings by adding trivial format
 strings.

Newer versions of GCC have the option to output warnings for insecure
(e.g. missing) format string usage. A few places were making calls to
the printf family of functions, and passing in a string variable
without a format string. In all cases, the desired format string was
simply "%s", intended to print the sole argument, and that "%s" has
been added.

This eliminates the warnings, and allows the build to complete when
-Werror=format-security is used.
---
 misc.c  | 4 ++--
 parse.c | 4 ++--
 2 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/misc.c b/misc.c
index ebaabb2..d9bb150 100644
--- a/misc.c
+++ b/misc.c
@@ -164,7 +164,7 @@ int print_to_ud(struct user_data *ud, const char *s) {
   	size_t slen;
   	char str[1024];
   
-  	snprintf(str, sizeof(str), s);
+  	snprintf(str, sizeof(str), "%s", s);
 
   	slen = strlen(str); /* NOT including null char */
   
@@ -184,7 +184,7 @@ int print_to_serv(struct user_data *ud, const char *s) {
 	size_t slen;
 	char str[130];
 
-	snprintf(str, sizeof(str), s);
+	snprintf(str, sizeof(str), "%s", s);
 	slen = strlen(str); /* NOT including null char */
 	if ( (&ud->u2s_buf[U2S_SIZE]-ud->u2s_i)<slen) {
 		printf("print_to_ud: can't fit string to buffer\n");
diff --git a/parse.c b/parse.c
index 1174202..ac4529f 100644
--- a/parse.c
+++ b/parse.c
@@ -345,7 +345,7 @@ parse_serv_buf(struct user_data *ud, int index, char *ucertspath, char *cafile)
 		ud->serv_status = SERV_PBSZ;
 		snprintf(s, sizeof(s), "PROT %c\r\n", ud->prot);
 		if (debug)
-			printf(s);
+			printf("%s", s);
 		print_to_serv(ud,s);
 	} else if ((ud->serv_status == SERV_PBSZ) && (strncasecmp(dst,"200 ",4) == 0) ) {
 		ud->serv_status = SERV_PROT;
@@ -365,7 +365,7 @@ parse_serv_buf(struct user_data *ud, int index, char *ucertspath, char *cafile)
 	} else if (ud->delay_prot && (ud->serv_status == SERV_PROT) && (strncasecmp(dst,"230 ",4) == 0) ) {
 		snprintf(s, sizeof(s), "PROT %c\r\n", ud->prot);
 		if (debug)
-			printf(s);
+			printf("%s", s);
 		print_to_serv(ud,s);
 	} else if (ud->delay_prot && (ud->serv_status == SERV_PROT) && (strncasecmp(dst,"200 ",4) == 0) ) {
 		write(ud->user_fd, "230 Bypassed login text because the ftpd can't handle PROT before USER.\r\n", 73);
-- 
2.7.3