[PATCH] constify static arrays of strings

[Mike Frysinger]

By marking these static & the array itself as const, the data is moved
into the read-only section of memory.  Otherwise a writable array is
created which takes up more space or code execution time.  So this will
both shrink & slightly speed up the code for free.
---
 auth-rhosts.c                         | 2 +-
 dns.c                                 | 2 +-
 kex.c                                 | 2 +-
 nchan.c                               | 8 ++++++--
 regress/misc/fuzz-harness/kex_fuzz.cc | 2 +-
 sftp-server.c                         | 2 +-
 ssh-keygen.c                          | 2 +-
 sshconnect2.c                         | 2 +-
 utf8.c                                | 4 +++-
 9 files changed, 16 insertions(+), 10 deletions(-)

diff --git a/auth-rhosts.c b/auth-rhosts.c
index 0bc4d424c781..7022d6a6f0f5 100644
--- a/auth-rhosts.c
+++ b/auth-rhosts.c
@@ -191,7 +191,7 @@ auth_rhosts2(struct passwd *pw, const char *client_user, const char *hostname,
 {
 	char buf[1024];
 	struct stat st;
-	static const char *rhosts_files[] = {".shosts", ".rhosts", NULL};
+	static const char * const rhosts_files[] = {".shosts", ".rhosts", NULL};
 	u_int rhosts_file_index;
 
 	debug2("auth_rhosts2: clientuser %s hostname %s ipaddr %s",
diff --git a/dns.c b/dns.c
index 1cfc38e7cc43..286b4021960a 100644
--- a/dns.c
+++ b/dns.c
@@ -43,7 +43,7 @@
 #include "log.h"
 #include "digest.h"
 
-static const char *errset_text[] = {
+static const char * const errset_text[] = {
 	"success",		/* 0 ERRSET_SUCCESS */
 	"out of memory",	/* 1 ERRSET_NOMEMORY */
 	"general failure",	/* 2 ERRSET_FAIL */
diff --git a/kex.c b/kex.c
index 709a0ec63aa0..195819f1d953 100644
--- a/kex.c
+++ b/kex.c
@@ -66,7 +66,7 @@
 static int kex_choose_conf(struct ssh *);
 static int kex_input_newkeys(int, u_int32_t, struct ssh *);
 
-static const char *proposal_names[PROPOSAL_MAX] = {
+static const char * const proposal_names[PROPOSAL_MAX] = {
 	"KEX algorithms",
 	"host key algorithms",
 	"ciphers ctos",
diff --git a/nchan.c b/nchan.c
index 7ef3a350b79a..72a1a8358aa2 100644
--- a/nchan.c
+++ b/nchan.c
@@ -82,8 +82,12 @@ static void	chan_shutdown_write(struct ssh *, Channel *);
 static void	chan_shutdown_read(struct ssh *, Channel *);
 static void	chan_shutdown_extended_read(struct ssh *, Channel *);
 
-static const char *ostates[] = { "open", "drain", "wait_ieof", "closed" };
-static const char *istates[] = { "open", "drain", "wait_oclose", "closed" };
+static const char * const ostates[] = {
+	"open", "drain", "wait_ieof", "closed",
+};
+static const char * const istates[] = {
+	"open", "drain", "wait_oclose", "closed",
+};
 
 static void
 chan_set_istate(Channel *c, u_int next)
diff --git a/regress/misc/fuzz-harness/kex_fuzz.cc b/regress/misc/fuzz-harness/kex_fuzz.cc
index 4740a7cb04c1..d1198fa6bc66 100644
--- a/regress/misc/fuzz-harness/kex_fuzz.cc
+++ b/regress/misc/fuzz-harness/kex_fuzz.cc
@@ -327,7 +327,7 @@ int main(void)
 	static struct shared_state *st;
 	struct test_state *ts;
 	const int keytypes[] = { KEY_RSA, KEY_DSA, KEY_ECDSA, KEY_ED25519, -1 };
-	const char *kextypes[] = {
+	static const char * const kextypes[] = {
 		"sntrup761x25519-sha512 at openssh.com",
 		"curve25519-sha256 at libssh.org",
 		"ecdh-sha2-nistp256",
diff --git a/sftp-server.c b/sftp-server.c
index 18d194911257..efef57cadb0d 100644
--- a/sftp-server.c
+++ b/sftp-server.c
@@ -517,7 +517,7 @@ send_msg(struct sshbuf *m)
 static const char *
 status_to_message(u_int32_t status)
 {
-	const char *status_messages[] = {
+	static const char * const status_messages[] = {
 		"Success",			/* SSH_FX_OK */
 		"End of file",			/* SSH_FX_EOF */
 		"No such file",			/* SSH_FX_NO_SUCH_FILE */
diff --git a/ssh-keygen.c b/ssh-keygen.c
index 4b40768d517f..76c6c726c17f 100644
--- a/ssh-keygen.c
+++ b/ssh-keygen.c
@@ -2459,7 +2459,7 @@ load_sign_key(const char *keypath, const struct sshkey *pubkey)
 {
 	size_t i, slen, plen = strlen(keypath);
 	char *privpath = xstrdup(keypath);
-	const char *suffixes[] = { "-cert.pub", ".pub", NULL };
+	static const char * const suffixes[] = { "-cert.pub", ".pub", NULL };
 	struct sshkey *ret = NULL, *privkey = NULL;
 	int r;
 
diff --git a/sshconnect2.c b/sshconnect2.c
index fea50fab61d3..808ff8d38e91 100644
--- a/sshconnect2.c
+++ b/sshconnect2.c
@@ -1318,7 +1318,7 @@ identity_sign(struct identity *id, u_char **sigp, size_t *lenp,
 static int
 id_filename_matches(Identity *id, Identity *private_id)
 {
-	const char *suffixes[] = { ".pub", "-cert.pub", NULL };
+	static const char * const suffixes[] = { ".pub", "-cert.pub", NULL };
 	size_t len = strlen(id->filename), plen = strlen(private_id->filename);
 	size_t i, slen;
 
diff --git a/utf8.c b/utf8.c
index 7f63b25aeefc..5cafe21e611f 100644
--- a/utf8.c
+++ b/utf8.c
@@ -325,7 +325,9 @@ mprintf(const char *fmt, ...)
 void
 msetlocale(void)
 {
-	const char *vars[] = { "LC_ALL", "LC_CTYPE", "LANG", NULL };
+	static const char * const vars[] = {
+		"LC_ALL", "LC_CTYPE", "LANG", NULL,
+	};
 	char *cp;
 	int i;
 
-- 
2.33.0