Fix coverity UNUSED_VALUE findings in core support level files

Most of these were just saving returned values without using them and
in some cases the variable being saved to could be removed as well.

(issue ASTERISK-19672)
........

Merged revisions 368738 from http://svn.asterisk.org/svn/asterisk/branches/1.8
........

Merged revisions 368739 from http://svn.asterisk.org/svn/asterisk/branches/10


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@368751 65c4cc65-6c06-0410-ace0-fbb531ad65f3

15 files changed, 21 insertions, 25 deletions

diff --git a/apps/app_directory.c b/apps/app_directory.c
index bbca1bf62..ce01bc83b 100644
--- a/apps/app_directory.c
+++ b/apps/app_directory.c
@@ -475,7 +475,8 @@ static struct ast_config *realtime_directory(char *context)
 		const char *ctx = ast_variable_retrieve(rtdata, mailbox, "context");
 
 		fullname = ast_variable_retrieve(rtdata, mailbox, "fullname");
-		if (ast_true((hidefromdir = ast_variable_retrieve(rtdata, mailbox, "hidefromdir")))) {
+		hidefromdir = ast_variable_retrieve(rtdata, mailbox, "hidefromdir");
+		if (ast_true(hidefromdir)) {
 			/* Skip hidden */
 			continue;
 		}
diff --git a/apps/app_queue.c b/apps/app_queue.c
index 16967985d..245b45173 100644
--- a/apps/app_queue.c
+++ b/apps/app_queue.c
@@ -2502,7 +2502,7 @@ static struct call_queue *find_queue_by_name_rt(const char *queuename, struct as
 	memset(tmpbuf, 0, sizeof(tmpbuf));
 	for (v = queue_vars; v; v = v->next) {
 		/* Convert to dashes `-' from underscores `_' as the latter are more SQL friendly. */
-		if ((tmp = strchr(v->name, '_'))) {
+		if (strchr(v->name, '_')) {
 			ast_copy_string(tmpbuf, v->name, sizeof(tmpbuf));
 			tmp_name = tmpbuf;
 			tmp = tmpbuf;
diff --git a/apps/app_voicemail.c b/apps/app_voicemail.c
index 39d284725..8ee8367e2 100644
--- a/apps/app_voicemail.c
+++ b/apps/app_voicemail.c
@@ -1740,7 +1740,7 @@ static void vm_change_password(struct ast_vm_user *vmu, const char *newpassword)
 			for (category = ast_category_browse(cfg, NULL); category; category = ast_category_browse(cfg, category)) {
 				ast_debug(4, "users.conf: %s\n", category);
 				if (!strcasecmp(category, vmu->mailbox)) {
-					if (!(tmp = ast_variable_retrieve(cfg, category, "vmsecret"))) {
+					if (!ast_variable_retrieve(cfg, category, "vmsecret")) {
 						ast_debug(3, "looks like we need to make vmsecret!\n");
 						var = ast_variable_new("vmsecret", newpassword, "");
 					} else {
diff --git a/channels/chan_dahdi.c b/channels/chan_dahdi.c
index 46c45899b..e6c39d28e 100644
--- a/channels/chan_dahdi.c
+++ b/channels/chan_dahdi.c
@@ -14489,14 +14489,13 @@ static char *handle_pri_service_generic(struct ast_cli_entry *e, int cmd, struct
 	int trunkgroup;
 	int x, y, fd = a->fd;
 	int interfaceid = 0;
-	char *c;
 	char db_chan_name[20], db_answer[5];
 	struct dahdi_pvt *tmp;
 	struct dahdi_pri *pri;
 
 	if (a->argc < 5 || a->argc > 6)
 		return CLI_SHOWUSAGE;
-	if ((c = strchr(a->argv[4], ':'))) {
+	if (strchr(a->argv[4], ':')) {
 		if (sscanf(a->argv[4], "%30d:%30d", &trunkgroup, &channel) != 2)
 			return CLI_SHOWUSAGE;
 		if ((trunkgroup < 1) || (channel < 1))
diff --git a/channels/chan_sip.c b/channels/chan_sip.c
index 051a538ec..d8c9f3958 100644
--- a/channels/chan_sip.c
+++ b/channels/chan_sip.c
@@ -14178,7 +14178,7 @@ static int transmit_refer(struct sip_pvt *p, const char *dest)
 		ast_log(LOG_NOTICE, "From address missing 'sip(s):', assuming sip:\n");
 	}
 	/* Get just the username part */
-	if ((c = strchr(dest, '@'))) {
+	if (strchr(dest, '@')) {
 		c = NULL;
 	} else if ((c = strchr(of, '@'))) {
 		*c++ = '\0';
diff --git a/channels/sip/dialplan_functions.c b/channels/sip/dialplan_functions.c
index fd8b04fb2..75fe82d4d 100644
--- a/channels/sip/dialplan_functions.c
+++ b/channels/sip/dialplan_functions.c
@@ -153,9 +153,9 @@ int sip_acf_channel_read(struct ast_channel *chan, const char *funcname, char *p
 		}
 
 		if (ast_strlen_zero(args.field) || !strcasecmp(args.field, "all")) {
-			char quality_buf[AST_MAX_USER_FIELD], *quality;
+			char quality_buf[AST_MAX_USER_FIELD];
 
-			if (!(quality = ast_rtp_instance_get_quality(rtp, AST_RTP_INSTANCE_STAT_FIELD_QUALITY, quality_buf, sizeof(quality_buf)))) {
+			if (!ast_rtp_instance_get_quality(rtp, AST_RTP_INSTANCE_STAT_FIELD_QUALITY, quality_buf, sizeof(quality_buf))) {
 				return -1;
 			}
 
diff --git a/channels/sip/reqresp_parser.c b/channels/sip/reqresp_parser.c
index e37d75b79..d87acda34 100644
--- a/channels/sip/reqresp_parser.c
+++ b/channels/sip/reqresp_parser.c
@@ -1079,7 +1079,7 @@ AST_TEST_DEFINE(get_in_brackets_test)
 	}
 
 	/* Test 6, NULL input  */
-	if ((uri = get_in_brackets(NULL))) {
+	if (get_in_brackets(NULL)) {
 		ast_test_status_update(test, "Test 6, NULL input failed.\n");
 		res = AST_TEST_FAIL;
 	}
diff --git a/channels/sip/sdp_crypto.c b/channels/sip/sdp_crypto.c
index 85adf83eb..7f8835514 100644
--- a/channels/sip/sdp_crypto.c
+++ b/channels/sip/sdp_crypto.c
@@ -52,9 +52,7 @@ static int set_crypto_policy(struct ast_srtp_policy *policy, int suite_val, cons
 
 static struct sdp_crypto *sdp_crypto_alloc(void)
 {
-	struct sdp_crypto *crypto;
-
-	return crypto = ast_calloc(1, sizeof(*crypto));
+	return ast_calloc(1, sizeof(struct sdp_crypto));
 }
 
 void sdp_crypto_destroy(struct sdp_crypto *crypto)
diff --git a/main/loader.c b/main/loader.c
index eacdff774..1415fa99f 100644
--- a/main/loader.c
+++ b/main/loader.c
@@ -1075,13 +1075,13 @@ int load_modules(unsigned int preload_only)
 			if (mod->flags.running)
 				continue;
 
-			order = add_to_load_order(mod->resource, &load_order, 0);
+			add_to_load_order(mod->resource, &load_order, 0);
 		}
 
 #ifdef LOADABLE_MODULES
 		/* if we are allowed to load dynamic modules, scan the directory for
 		   for all available modules and add them as well */
-		if ((dir  = opendir(ast_config_AST_MODULE_DIR))) {
+		if ((dir = opendir(ast_config_AST_MODULE_DIR))) {
 			while ((dirent = readdir(dir))) {
 				int ld = strlen(dirent->d_name);
 
diff --git a/main/say.c b/main/say.c
index 9d6d4b16c..f8379c526 100644
--- a/main/say.c
+++ b/main/say.c
@@ -1915,7 +1915,7 @@ static void powiedz(struct ast_channel *chan, const char *language, int audiofd,
 			char *b = buf;
 			b = pl_append(b, odm->dziesiatki[m100 / 10]);
 			b = pl_append(b, odm->separator_dziesiatek);
-			b = pl_append(b, odm->cyfry2[m100 % 10]);
+			pl_append(b, odm->cyfry2[m100 % 10]);
 			pl_odtworz_plik(chan, language, audiofd, ctrlfd, ints, buf);
 		}
 	}
diff --git a/pbx/pbx_config.c b/pbx/pbx_config.c
index cf9b26fe5..488241ab5 100644
--- a/pbx/pbx_config.c
+++ b/pbx/pbx_config.c
@@ -1481,7 +1481,7 @@ static int pbx_load_config(const char *config_file)
 				}
 			} else if (!strcasecmp(v->name, "exten")) {
 				int ipri;
-				char *plus, *firstp;
+				char *plus;
 				char *pri, *appl, *data, *cidmatch;
 
 				if (!(stringp = tc = ast_strdup(v->value))) {
@@ -1551,7 +1551,7 @@ process_extension:
 				}
 				appl = S_OR(stringp, "");
 				/* Find the first occurrence of '(' */
-				if (!(firstp = strchr(appl, '('))) {
+				if (!strchr(appl, '(')) {
 					/* No arguments */
 					data = "";
 				} else {
diff --git a/res/res_config_odbc.c b/res/res_config_odbc.c
index 46922835f..66e15a02b 100644
--- a/res/res_config_odbc.c
+++ b/res/res_config_odbc.c
@@ -518,7 +518,7 @@ static int update_odbc(const char *database, const char *table, const char *keyf
 	}
 	va_arg(aq, const char *);
 
-	if (tableptr && !(column = ast_odbc_find_column(tableptr, newparam))) {
+	if (tableptr && !ast_odbc_find_column(tableptr, newparam)) {
 		ast_log(LOG_WARNING, "Key field '%s' does not exist in table '%s@%s'.  Update will fail\n", newparam, table, database);
 	}
 
@@ -587,7 +587,6 @@ static SQLHSTMT update2_prepare(struct odbc_obj *obj, void *data)
 	SQLHSTMT stmt;
 	va_list ap;
 	struct odbc_cache_tables *tableptr = ast_odbc_find_table(ups->database, ups->table);
-	struct odbc_cache_columns *column;
 
 	if (!sql) {
 		if (tableptr) {
@@ -619,7 +618,7 @@ static SQLHSTMT update2_prepare(struct odbc_obj *obj, void *data)
 
 	while ((newparam = va_arg(ap, const char *))) {
 		newval = va_arg(ap, const char *);
-		if ((column = ast_odbc_find_column(tableptr, newparam))) {
+		if (ast_odbc_find_column(tableptr, newparam)) {
 			ast_str_append(&sql, 0, "%s%s=? ", first ? "" : ", ", newparam);
 			SQLBindParameter(stmt, x++, SQL_PARAM_INPUT, SQL_C_CHAR, SQL_CHAR, strlen(newval), 0, (void *)newval, 0, NULL);
 			first = 0;
@@ -637,7 +636,7 @@ static SQLHSTMT update2_prepare(struct odbc_obj *obj, void *data)
 
 	while ((newparam = va_arg(ap, const char *))) {
 		newval = va_arg(ap, const char *);
-		if (!(column = ast_odbc_find_column(tableptr, newparam))) {
+		if (!ast_odbc_find_column(tableptr, newparam)) {
 			va_end(ap);
 			ast_log(LOG_ERROR, "One or more of the criteria columns '%s' on '%s@%s' for this update does not exist!\n", newparam, ups->table, ups->database);
 			ast_odbc_release_table(tableptr);
diff --git a/res/res_fax.c b/res/res_fax.c
index 7b628d364..50c1c368d 100644
--- a/res/res_fax.c
+++ b/res/res_fax.c
@@ -583,7 +583,7 @@ static int update_modem_bits(enum ast_fax_modems *bits, const char *value)
 	char *m[5], *tok, *v = (char *)value;
 	int i = 0, j;
 
-	if (!(tok = strchr(v, ','))) {
+	if (!strchr(v, ',')) {
 		m[i++] = v;
 		m[i] = NULL;
 	} else {
diff --git a/res/res_odbc.c b/res/res_odbc.c
index 39475e98e..3afa088da 100644
--- a/res/res_odbc.c
+++ b/res/res_odbc.c
@@ -1628,7 +1628,7 @@ static int acf_transaction_write(struct ast_channel *chan, const char *cmd, char
 				pbx_builtin_setvar_helper(chan, "ODBC_RESULT", "INVALID_DB");
 				return -1;
 			}
-			if (!(tx = find_transaction(chan, obj, value, 0))) {
+			if (!find_transaction(chan, obj, value, 0)) {
 				pbx_builtin_setvar_helper(chan, "ODBC_RESULT", "FAILED_TO_CREATE");
 				return -1;
 			}
diff --git a/res/res_speech.c b/res/res_speech.c
index de0c41e08..e6fdab9d0 100644
--- a/res/res_speech.c
+++ b/res/res_speech.c
@@ -276,7 +276,6 @@ int ast_speech_change_results_type(struct ast_speech *speech, enum ast_speech_re
 /*! \brief Register a speech recognition engine */
 int ast_speech_register(struct ast_speech_engine *engine)
 {
-	struct ast_speech_engine *existing_engine = NULL;
 	int res = 0;
 
 	/* Confirm the engine meets the minimum API requirements */
@@ -286,7 +285,7 @@ int ast_speech_register(struct ast_speech_engine *engine)
 	}
 
 	/* If an engine is already loaded with this name, error out */
-	if ((existing_engine = find_engine(engine->name))) {
+	if (find_engine(engine->name)) {
 		ast_log(LOG_WARNING, "Speech recognition engine '%s' already exists.\n", engine->name);
 		return -1;
 	}