From 10f70a8321d064d77106d056a361876d4d36628d Mon Sep 17 00:00:00 2001
From: Luigi Rizzo <rizzo@icir.org>
Date: Tue, 18 Dec 2007 10:24:58 +0000
Subject: [PATCH] make configuration variable const so they are not
accidentally modified. This requires casting the strings in asterisk.c when
writing to them, so we do it through a macro to do it consistently.
git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@93603 65c4cc65-6c06-0410-ace0-fbb531ad65f3
---
channels/chan_sip.c | 2 +-
include/asterisk/paths.h | 46 ++++++++-------
main/asterisk.c | 122 ++++++++++++++++++++-------------------
res/res_crypto.c | 2 +-
res/res_monitor.c | 2 +-
utils/ael_main.c | 10 ++--
utils/conf2ael.c | 6 +-
utils/extconf.c | 2 +-
8 files changed, 99 insertions(+), 93 deletions(-)
diff --git a/channels/chan_sip.c b/channels/chan_sip.c
index 467dcd76de..d6fa8f93d6 100644
--- a/channels/chan_sip.c
+++ b/channels/chan_sip.c
@@ -2907,7 +2907,7 @@ static void realtime_update_peer(const char *peername, struct sockaddr_in *sin,
char regseconds[20];
char *tablename = NULL;
- char *sysname = ast_config_AST_SYSTEM_NAME;
+ const char *sysname = ast_config_AST_SYSTEM_NAME;
char *syslabel = NULL;
time_t nowtime = time(NULL) + expirey;
diff --git a/include/asterisk/paths.h b/include/asterisk/paths.h
index f539c078e4..7c5f5aa652 100644
--- a/include/asterisk/paths.h
+++ b/include/asterisk/paths.h
@@ -17,27 +17,31 @@
#ifndef _ASTERISK_PATHS_H
#define _ASTERISK_PATHS_H
+#
+extern const char ast_config_AST_CONFIG_DIR[PATH_MAX];
+extern const char ast_config_AST_CONFIG_FILE[PATH_MAX];
+extern const char ast_config_AST_MODULE_DIR[PATH_MAX];
+extern const char ast_config_AST_SPOOL_DIR[PATH_MAX];
+extern const char ast_config_AST_MONITOR_DIR[PATH_MAX];
+extern const char ast_config_AST_VAR_DIR[PATH_MAX];
+extern const char ast_config_AST_DATA_DIR[PATH_MAX];
+extern const char ast_config_AST_LOG_DIR[PATH_MAX];
+extern const char ast_config_AST_AGI_DIR[PATH_MAX];
+extern const char ast_config_AST_DB[PATH_MAX];
+extern const char ast_config_AST_KEY_DIR[PATH_MAX];
+extern const char ast_config_AST_PID[PATH_MAX];
+extern const char ast_config_AST_SOCKET[PATH_MAX];
+extern const char ast_config_AST_RUN_DIR[PATH_MAX];
+extern const char ast_config_AST_RUN_GROUP[PATH_MAX];
+extern const char ast_config_AST_RUN_USER[PATH_MAX];
+extern const char ast_config_AST_SYSTEM_NAME[20];
+
+#if 0 /* only used in main/asterisk.c */
+extern const char ast_config_AST_CTL_PERMISSIONS[PATH_MAX];
+extern const char ast_config_AST_CTL_OWNER[PATH_MAX];
+extern const char ast_config_AST_CTL_GROUP[PATH_MAX];
+extern const char ast_config_AST_CTL[PATH_MAX];
+#endif
-extern char ast_config_AST_CONFIG_DIR[PATH_MAX];
-extern char ast_config_AST_CONFIG_FILE[PATH_MAX];
-extern char ast_config_AST_MODULE_DIR[PATH_MAX];
-extern char ast_config_AST_SPOOL_DIR[PATH_MAX];
-extern char ast_config_AST_MONITOR_DIR[PATH_MAX];
-extern char ast_config_AST_VAR_DIR[PATH_MAX];
-extern char ast_config_AST_DATA_DIR[PATH_MAX];
-extern char ast_config_AST_LOG_DIR[PATH_MAX];
-extern char ast_config_AST_AGI_DIR[PATH_MAX];
-extern char ast_config_AST_DB[PATH_MAX];
-extern char ast_config_AST_KEY_DIR[PATH_MAX];
-extern char ast_config_AST_PID[PATH_MAX];
-extern char ast_config_AST_SOCKET[PATH_MAX];
-extern char ast_config_AST_RUN_DIR[PATH_MAX];
-extern char ast_config_AST_RUN_GROUP[PATH_MAX];
-extern char ast_config_AST_RUN_USER[PATH_MAX];
-extern char ast_config_AST_CTL_PERMISSIONS[PATH_MAX];
-extern char ast_config_AST_CTL_OWNER[PATH_MAX];
-extern char ast_config_AST_CTL_GROUP[PATH_MAX];
-extern char ast_config_AST_CTL[PATH_MAX];
-extern char ast_config_AST_SYSTEM_NAME[20];
#endif /* _ASTERISK_PATHS_H */
diff --git a/main/asterisk.c b/main/asterisk.c
index ae825126e4..d869d3cbf0 100644
--- a/main/asterisk.c
+++ b/main/asterisk.c
@@ -92,6 +92,7 @@ int daemon(int, int); /* defined in libresolv of all places */
#include <sys/loadavg.h>
#endif
+#include "asterisk/paths.h" /* we define here the variables so better agree on the prototype */
#include "asterisk/network.h"
#include "asterisk/cli.h"
#include "asterisk/channel.h"
@@ -199,27 +200,27 @@ static int ast_el_add_history(char *);
static int ast_el_read_history(char *);
static int ast_el_write_history(char *);
-char ast_config_AST_CONFIG_DIR[PATH_MAX];
-char ast_config_AST_CONFIG_FILE[PATH_MAX];
-char ast_config_AST_MODULE_DIR[PATH_MAX];
-char ast_config_AST_SPOOL_DIR[PATH_MAX];
-char ast_config_AST_MONITOR_DIR[PATH_MAX];
-char ast_config_AST_VAR_DIR[PATH_MAX];
-char ast_config_AST_DATA_DIR[PATH_MAX];
-char ast_config_AST_LOG_DIR[PATH_MAX];
-char ast_config_AST_AGI_DIR[PATH_MAX];
-char ast_config_AST_DB[PATH_MAX];
-char ast_config_AST_KEY_DIR[PATH_MAX];
-char ast_config_AST_PID[PATH_MAX];
-char ast_config_AST_SOCKET[PATH_MAX];
-char ast_config_AST_RUN_DIR[PATH_MAX];
-char ast_config_AST_RUN_USER[PATH_MAX];
-char ast_config_AST_RUN_GROUP[PATH_MAX];
-char ast_config_AST_CTL_PERMISSIONS[PATH_MAX];
-char ast_config_AST_CTL_OWNER[PATH_MAX] = "\0";
-char ast_config_AST_CTL_GROUP[PATH_MAX] = "\0";
-char ast_config_AST_CTL[PATH_MAX] = "asterisk.ctl";
-char ast_config_AST_SYSTEM_NAME[20] = "";
+const char ast_config_AST_CONFIG_DIR[PATH_MAX];
+const char ast_config_AST_CONFIG_FILE[PATH_MAX];
+const char ast_config_AST_MODULE_DIR[PATH_MAX];
+const char ast_config_AST_SPOOL_DIR[PATH_MAX];
+const char ast_config_AST_MONITOR_DIR[PATH_MAX];
+const char ast_config_AST_VAR_DIR[PATH_MAX];
+const char ast_config_AST_DATA_DIR[PATH_MAX];
+const char ast_config_AST_LOG_DIR[PATH_MAX];
+const char ast_config_AST_AGI_DIR[PATH_MAX];
+const char ast_config_AST_DB[PATH_MAX];
+const char ast_config_AST_KEY_DIR[PATH_MAX];
+const char ast_config_AST_PID[PATH_MAX];
+const char ast_config_AST_SOCKET[PATH_MAX];
+const char ast_config_AST_RUN_DIR[PATH_MAX];
+const char ast_config_AST_RUN_USER[PATH_MAX];
+const char ast_config_AST_RUN_GROUP[PATH_MAX];
+static const char ast_config_AST_CTL_PERMISSIONS[PATH_MAX];
+static const char ast_config_AST_CTL_OWNER[PATH_MAX] = "\0";
+static const char ast_config_AST_CTL_GROUP[PATH_MAX] = "\0";
+static const char ast_config_AST_CTL[PATH_MAX] = "asterisk.ctl";
+const char ast_config_AST_SYSTEM_NAME[20] = "";
extern const char *ast_build_hostname;
extern const char *ast_build_kernel;
@@ -2419,19 +2420,20 @@ static void ast_readconfig(void)
cfg = ast_config_load(config, config_flags);
/* init with buildtime config */
- ast_copy_string(ast_config_AST_CONFIG_DIR, DEFAULT_CONFIG_DIR, sizeof(ast_config_AST_CONFIG_DIR));
- ast_copy_string(ast_config_AST_SPOOL_DIR, DEFAULT_SPOOL_DIR, sizeof(ast_config_AST_SPOOL_DIR));
- ast_copy_string(ast_config_AST_MODULE_DIR, DEFAULT_MODULE_DIR, sizeof(ast_config_AST_MODULE_DIR));
- snprintf(ast_config_AST_MONITOR_DIR, sizeof(ast_config_AST_MONITOR_DIR) - 1, "%s/monitor", ast_config_AST_SPOOL_DIR);
- ast_copy_string(ast_config_AST_VAR_DIR, DEFAULT_VAR_DIR, sizeof(ast_config_AST_VAR_DIR));
- ast_copy_string(ast_config_AST_DATA_DIR, DEFAULT_DATA_DIR, sizeof(ast_config_AST_DATA_DIR));
- ast_copy_string(ast_config_AST_LOG_DIR, DEFAULT_LOG_DIR, sizeof(ast_config_AST_LOG_DIR));
- ast_copy_string(ast_config_AST_AGI_DIR, DEFAULT_AGI_DIR, sizeof(ast_config_AST_AGI_DIR));
- ast_copy_string(ast_config_AST_DB, DEFAULT_DB, sizeof(ast_config_AST_DB));
- ast_copy_string(ast_config_AST_KEY_DIR, DEFAULT_KEY_DIR, sizeof(ast_config_AST_KEY_DIR));
- ast_copy_string(ast_config_AST_PID, DEFAULT_PID, sizeof(ast_config_AST_PID));
- ast_copy_string(ast_config_AST_SOCKET, DEFAULT_SOCKET, sizeof(ast_config_AST_SOCKET));
- ast_copy_string(ast_config_AST_RUN_DIR, DEFAULT_RUN_DIR, sizeof(ast_config_AST_RUN_DIR));
+#define _SETVAR(dst, src) ast_copy_string((char *)dst, src, sizeof(dst))
+ _SETVAR(ast_config_AST_CONFIG_DIR, DEFAULT_CONFIG_DIR);
+ _SETVAR(ast_config_AST_SPOOL_DIR, DEFAULT_SPOOL_DIR);
+ _SETVAR(ast_config_AST_MODULE_DIR, DEFAULT_MODULE_DIR);
+ snprintf((char *)ast_config_AST_MONITOR_DIR, sizeof(ast_config_AST_MONITOR_DIR) - 1, "%s/monitor", ast_config_AST_SPOOL_DIR);
+ _SETVAR(ast_config_AST_VAR_DIR, DEFAULT_VAR_DIR);
+ _SETVAR(ast_config_AST_DATA_DIR, DEFAULT_DATA_DIR);
+ _SETVAR(ast_config_AST_LOG_DIR, DEFAULT_LOG_DIR);
+ _SETVAR(ast_config_AST_AGI_DIR, DEFAULT_AGI_DIR);
+ _SETVAR(ast_config_AST_DB, DEFAULT_DB);
+ _SETVAR(ast_config_AST_KEY_DIR, DEFAULT_KEY_DIR);
+ _SETVAR(ast_config_AST_PID, DEFAULT_PID);
+ _SETVAR(ast_config_AST_SOCKET, DEFAULT_SOCKET);
+ _SETVAR(ast_config_AST_RUN_DIR, DEFAULT_RUN_DIR);
/* no asterisk.conf? no problem, use buildtime config! */
if (!cfg) {
@@ -2440,45 +2442,45 @@ static void ast_readconfig(void)
for (v = ast_variable_browse(cfg, "files"); v; v = v->next) {
if (!strcasecmp(v->name, "astctlpermissions"))
- ast_copy_string(ast_config_AST_CTL_PERMISSIONS, v->value, sizeof(ast_config_AST_CTL_PERMISSIONS));
+ _SETVAR(ast_config_AST_CTL_PERMISSIONS, v->value);
else if (!strcasecmp(v->name, "astctlowner"))
- ast_copy_string(ast_config_AST_CTL_OWNER, v->value, sizeof(ast_config_AST_CTL_OWNER));
+ _SETVAR(ast_config_AST_CTL_OWNER, v->value);
else if (!strcasecmp(v->name, "astctlgroup"))
- ast_copy_string(ast_config_AST_CTL_GROUP, v->value, sizeof(ast_config_AST_CTL_GROUP));
+ _SETVAR(ast_config_AST_CTL_GROUP, v->value);
else if (!strcasecmp(v->name, "astctl"))
- ast_copy_string(ast_config_AST_CTL, v->value, sizeof(ast_config_AST_CTL));
+ _SETVAR(ast_config_AST_CTL, v->value);
}
for (v = ast_variable_browse(cfg, "directories"); v; v = v->next) {
if (!strcasecmp(v->name, "astetcdir")) {
- ast_copy_string(ast_config_AST_CONFIG_DIR, v->value, sizeof(ast_config_AST_CONFIG_DIR));
+ _SETVAR(ast_config_AST_CONFIG_DIR, v->value);
} else if (!strcasecmp(v->name, "astspooldir")) {
- ast_copy_string(ast_config_AST_SPOOL_DIR, v->value, sizeof(ast_config_AST_SPOOL_DIR));
- snprintf(ast_config_AST_MONITOR_DIR, sizeof(ast_config_AST_MONITOR_DIR) - 1, "%s/monitor", v->value);
+ _SETVAR(ast_config_AST_SPOOL_DIR, v->value);
+ snprintf((char *)ast_config_AST_MONITOR_DIR, sizeof(ast_config_AST_MONITOR_DIR) - 1, "%s/monitor", v->value);
} else if (!strcasecmp(v->name, "astvarlibdir")) {
- ast_copy_string(ast_config_AST_VAR_DIR, v->value, sizeof(ast_config_AST_VAR_DIR));
+ _SETVAR(ast_config_AST_VAR_DIR, v->value);
if (!found.dbdir)
- snprintf(ast_config_AST_DB, sizeof(ast_config_AST_DB), "%s/astdb", v->value);
+ snprintf((char *)ast_config_AST_DB, sizeof(ast_config_AST_DB), "%s/astdb", v->value);
} else if (!strcasecmp(v->name, "astdbdir")) {
- snprintf(ast_config_AST_DB, sizeof(ast_config_AST_DB), "%s/astdb", v->value);
+ snprintf((char *)ast_config_AST_DB, sizeof(ast_config_AST_DB), "%s/astdb", v->value);
found.dbdir = 1;
} else if (!strcasecmp(v->name, "astdatadir")) {
- ast_copy_string(ast_config_AST_DATA_DIR, v->value, sizeof(ast_config_AST_DATA_DIR));
+ _SETVAR(ast_config_AST_DATA_DIR, v->value);
if (!found.keydir)
- snprintf(ast_config_AST_KEY_DIR, sizeof(ast_config_AST_KEY_DIR), "%s/keys", v->value);
+ snprintf((char *)ast_config_AST_KEY_DIR, sizeof(ast_config_AST_KEY_DIR), "%s/keys", v->value);
} else if (!strcasecmp(v->name, "astkeydir")) {
- snprintf(ast_config_AST_KEY_DIR, sizeof(ast_config_AST_KEY_DIR), "%s/keys", v->value);
+ snprintf((char *)ast_config_AST_KEY_DIR, sizeof(ast_config_AST_KEY_DIR), "%s/keys", v->value);
found.keydir = 1;
} else if (!strcasecmp(v->name, "astlogdir")) {
- ast_copy_string(ast_config_AST_LOG_DIR, v->value, sizeof(ast_config_AST_LOG_DIR));
+ _SETVAR(ast_config_AST_LOG_DIR, v->value);
} else if (!strcasecmp(v->name, "astagidir")) {
- ast_copy_string(ast_config_AST_AGI_DIR, v->value, sizeof(ast_config_AST_AGI_DIR));
+ _SETVAR(ast_config_AST_AGI_DIR, v->value);
} else if (!strcasecmp(v->name, "astrundir")) {
- snprintf(ast_config_AST_PID, sizeof(ast_config_AST_PID), "%s/%s", v->value, "asterisk.pid");
- snprintf(ast_config_AST_SOCKET, sizeof(ast_config_AST_SOCKET), "%s/%s", v->value, ast_config_AST_CTL);
- ast_copy_string(ast_config_AST_RUN_DIR, v->value, sizeof(ast_config_AST_RUN_DIR));
+ snprintf((char *)ast_config_AST_PID, sizeof(ast_config_AST_PID), "%s/%s", v->value, "asterisk.pid");
+ snprintf((char *)ast_config_AST_SOCKET, sizeof(ast_config_AST_SOCKET), "%s/%s", v->value, ast_config_AST_CTL);
+ _SETVAR(ast_config_AST_RUN_DIR, v->value);
} else if (!strcasecmp(v->name, "astmoddir")) {
- ast_copy_string(ast_config_AST_MODULE_DIR, v->value, sizeof(ast_config_AST_MODULE_DIR));
+ _SETVAR(ast_config_AST_MODULE_DIR, v->value);
}
}
@@ -2561,19 +2563,19 @@ static void ast_readconfig(void)
set_ulimit(option_maxfiles);
/* What user to run as */
} else if (!strcasecmp(v->name, "runuser")) {
- ast_copy_string(ast_config_AST_RUN_USER, v->value, sizeof(ast_config_AST_RUN_USER));
+ _SETVAR(ast_config_AST_RUN_USER, v->value);
/* What group to run as */
} else if (!strcasecmp(v->name, "rungroup")) {
- ast_copy_string(ast_config_AST_RUN_GROUP, v->value, sizeof(ast_config_AST_RUN_GROUP));
+ _SETVAR(ast_config_AST_RUN_GROUP, v->value);
} else if (!strcasecmp(v->name, "systemname")) {
- ast_copy_string(ast_config_AST_SYSTEM_NAME, v->value, sizeof(ast_config_AST_SYSTEM_NAME));
+ _SETVAR(ast_config_AST_SYSTEM_NAME, v->value);
} else if (!strcasecmp(v->name, "autosystemname")) {
if (ast_true(v->value)) {
if (!gethostname(hostname, sizeof(hostname) - 1))
- ast_copy_string(ast_config_AST_SYSTEM_NAME, hostname, sizeof(ast_config_AST_SYSTEM_NAME));
+ _SETVAR(ast_config_AST_SYSTEM_NAME, hostname);
else {
if (ast_strlen_zero(ast_config_AST_SYSTEM_NAME)){
- ast_copy_string(ast_config_AST_SYSTEM_NAME, "localhost", sizeof(ast_config_AST_SYSTEM_NAME));
+ _SETVAR(ast_config_AST_SYSTEM_NAME, "localhost");
}
ast_log(LOG_ERROR, "Cannot obtain hostname for this system. Using '%s' instead.\n", ast_config_AST_SYSTEM_NAME);
}
@@ -2636,7 +2638,7 @@ int main(int argc, char *argv[])
int num;
int isroot = 1;
char *buf;
- char *runuser = NULL, *rungroup = NULL;
+ const char *runuser = NULL, *rungroup = NULL;
/* Remember original args for restart */
if (argc > sizeof(_argv) / sizeof(_argv[0]) - 1) {
@@ -2732,7 +2734,7 @@ int main(int argc, char *argv[])
xarg = optarg;
break;
case 'C':
- ast_copy_string(ast_config_AST_CONFIG_FILE, optarg, sizeof(ast_config_AST_CONFIG_FILE));
+ _SETVAR(ast_config_AST_CONFIG_FILE, optarg);
ast_set_flag(&ast_options, AST_OPT_FLAG_OVERRIDE_CONFIG);
break;
case 'I':
diff --git a/res/res_crypto.c b/res/res_crypto.c
index fc7f08abb3..f1a2234fd4 100644
--- a/res/res_crypto.c
+++ b/res/res_crypto.c
@@ -146,7 +146,7 @@ static struct ast_key *__ast_key_get(const char *kname, int ktype)
* \retval key on success.
* \retval NULL on failure.
*/
-static struct ast_key *try_load_key(char *dir, char *fname, int ifd, int ofd, int *not2)
+static struct ast_key *try_load_key(const char *dir, const char *fname, int ifd, int ofd, int *not2)
{
int ktype = 0, found = 0;
char *c = NULL, ffname[256];
diff --git a/res/res_monitor.c b/res/res_monitor.c
index 617b7b6fc3..3ce3b6d901 100644
--- a/res/res_monitor.c
+++ b/res/res_monitor.c
@@ -320,7 +320,7 @@ int ast_monitor_stop(struct ast_channel *chan, int need_lock)
const char *format = !strcasecmp(chan->monitor->format,"wav49") ? "WAV" : chan->monitor->format;
char *name = chan->monitor->filename_base;
int directory = strchr(name, '/') ? 1 : 0;
- char *dir = directory ? "" : ast_config_AST_MONITOR_DIR;
+ const char *dir = directory ? "" : ast_config_AST_MONITOR_DIR;
const char *execute, *execute_args;
/* Set the execute application */
diff --git a/utils/ael_main.c b/utils/ael_main.c
index 830b838074..68b5dc4798 100644
--- a/utils/ael_main.c
+++ b/utils/ael_main.c
@@ -82,8 +82,8 @@ struct namelist *globalvars_last;
int conts=0, extens=0, priors=0;
char last_exten[18000];
-char ast_config_AST_CONFIG_DIR[PATH_MAX];
-char ast_config_AST_VAR_DIR[PATH_MAX];
+const char ast_config_AST_CONFIG_DIR[PATH_MAX];
+const char ast_config_AST_VAR_DIR[PATH_MAX];
void ast_cli_register_multiple(void);
int ast_add_extension2(struct ast_context *con,
@@ -514,14 +514,14 @@ int main(int argc, char **argv)
}
if( use_curr_dir ) {
- strcpy(ast_config_AST_CONFIG_DIR, ".");
+ strcpy((char *)ast_config_AST_CONFIG_DIR, ".");
localized_use_local_dir();
}
else {
- strcpy(ast_config_AST_CONFIG_DIR, "/etc/asterisk");
+ strcpy((char *)ast_config_AST_CONFIG_DIR, "/etc/asterisk");
localized_use_conf_dir();
}
- strcpy(ast_config_AST_VAR_DIR, "/var/lib/asterisk");
+ strcpy((char *)ast_config_AST_VAR_DIR, "/var/lib/asterisk");
if( dump_extensions ) {
dumpfile = fopen("extensions.conf.aeldump","w");
diff --git a/utils/conf2ael.c b/utils/conf2ael.c
index 4983b5bf24..b8cae75ecc 100644
--- a/utils/conf2ael.c
+++ b/utils/conf2ael.c
@@ -63,7 +63,7 @@ void get_start_stop(unsigned int *word, int bitsperword, int totalbits, int *sta
int all_bits_set(unsigned int *word, int bitsperword, int totalbits);
extern char *days[];
extern char *months[];
-char ast_config_AST_CONFIG_DIR[PATH_MAX];
+const char ast_config_AST_CONFIG_DIR[PATH_MAX];
char *config = "extensions.conf";
@@ -79,7 +79,7 @@ char ast_config_AST_SYSTEM_NAME[20] = ""; */
/*! Go no deeper than this through includes (not counting loops) */
#define AST_PBX_MAX_STACK 128
/* static AST_RWLIST_HEAD_STATIC(acf_root, ast_custom_function); */
-extern char ast_config_AST_CONFIG_DIR[PATH_MAX];
+//extern char ast_config_AST_CONFIG_DIR[PATH_MAX];
void ast_register_file_version(const char *file, const char *version)
{
@@ -363,7 +363,7 @@ int main(int argc, char **argv)
if (!localdir)
printf(" (You could use -d the use the extensions.conf in the current directory!)\n");
- strcpy(ast_config_AST_CONFIG_DIR,"/etc/asterisk");
+ strcpy((char *)ast_config_AST_CONFIG_DIR,"/etc/asterisk");
printf("Loading %s/%s...\n", ast_config_AST_CONFIG_DIR, config);
diff --git a/utils/extconf.c b/utils/extconf.c
index c6e8cf6103..4621e345bb 100644
--- a/utils/extconf.c
+++ b/utils/extconf.c
@@ -53,7 +53,7 @@
# include <glob.h>
#endif
-static char ast_config_AST_CONFIG_DIR[PATH_MAX] = {"/etc/asterisk"};
+static const char ast_config_AST_CONFIG_DIR[PATH_MAX] = {"/etc/asterisk"};
#define AST_API_MODULE 1 /* gimme the inline defs! */
struct ast_channel
{