libxtables: Introduce xtables_strdup() and use it everywhere

This wraps strdup(), checking for errors.

Signed-off-by: Phil Sutter <phil@nwl.cc>

4 files changed, 12 insertions, 11 deletions

diff --git a/iptables/iptables-xml.c b/iptables/iptables-xml.c
index 98d03dda..6cf059fb 100644
--- a/iptables/iptables-xml.c
+++ b/iptables/iptables-xml.c
@@ -213,8 +213,8 @@ saveChain(char *chain, char *policy, struct xt_counters *ctr)
 			   "%s: line %u chain name invalid\n",
 			   prog_name, line);
 
-	chains[nextChain].chain = strdup(chain);
-	chains[nextChain].policy = strdup(policy);
+	chains[nextChain].chain = xtables_strdup(chain);
+	chains[nextChain].policy = xtables_strdup(policy);
 	chains[nextChain].count = *ctr;
 	chains[nextChain].created = 0;
 	nextChain++;
diff --git a/iptables/nft-cache.c b/iptables/nft-cache.c
index 8fbf9727..2c88301c 100644
--- a/iptables/nft-cache.c
+++ b/iptables/nft-cache.c
@@ -40,7 +40,7 @@ static void cache_chain_list_insert(struct list_head *list, const char *name)
 	}
 
 	new = xtables_malloc(sizeof(*new));
-	new->name = strdup(name);
+	new->name = xtables_strdup(name);
 	list_add_tail(&new->head, pos ? &pos->head : list);
 }
 
@@ -56,7 +56,7 @@ void nft_cache_level_set(struct nft_handle *h, int level,
 		return;
 
 	if (!req->table)
-		req->table = strdup(cmd->table);
+		req->table = xtables_strdup(cmd->table);
 	else
 		assert(!strcmp(req->table, cmd->table));
 
diff --git a/iptables/nft-cmd.c b/iptables/nft-cmd.c
index c3f6c14e..a0c76a79 100644
--- a/iptables/nft-cmd.c
+++ b/iptables/nft-cmd.c
@@ -11,6 +11,7 @@
 
 #include <stdlib.h>
 #include <string.h>
+#include <xtables.h>
 #include "nft.h"
 #include "nft-cmd.h"
 
@@ -27,9 +28,9 @@ struct nft_cmd *nft_cmd_new(struct nft_handle *h, int command,
 		return NULL;
 
 	cmd->command = command;
-	cmd->table = strdup(table);
+	cmd->table = xtables_strdup(table);
 	if (chain)
-		cmd->chain = strdup(chain);
+		cmd->chain = xtables_strdup(chain);
 	cmd->rulenum = rulenum;
 	cmd->verbose = verbose;
 
@@ -43,7 +44,7 @@ struct nft_cmd *nft_cmd_new(struct nft_handle *h, int command,
 		cmd->obj.rule = rule;
 
 		if (!state->target && strlen(state->jumpto) > 0)
-			cmd->jumpto = strdup(state->jumpto);
+			cmd->jumpto = xtables_strdup(state->jumpto);
 	}
 
 	list_add_tail(&cmd->head, &h->cmd_list);
@@ -238,7 +239,7 @@ int nft_cmd_chain_user_rename(struct nft_handle *h,const char *chain,
 	if (!cmd)
 		return 0;
 
-	cmd->rename = strdup(newname);
+	cmd->rename = xtables_strdup(newname);
 
 	nft_cache_level_set(h, NFT_CL_CHAINS, cmd);
 
@@ -304,7 +305,7 @@ int nft_cmd_chain_set(struct nft_handle *h, const char *table,
 	if (!cmd)
 		return 0;
 
-	cmd->policy = strdup(policy);
+	cmd->policy = xtables_strdup(policy);
 	if (counters)
 		cmd->counters = *counters;
 
@@ -389,7 +390,7 @@ int ebt_cmd_user_chain_policy(struct nft_handle *h, const char *table,
 	if (!cmd)
 		return 0;
 
-	cmd->policy = strdup(policy);
+	cmd->policy = xtables_strdup(policy);
 
 	nft_cache_level_set(h, NFT_CL_RULES, cmd);
 
diff --git a/iptables/xshared.c b/iptables/xshared.c
index 49a88de5..ed3e9c5a 100644
--- a/iptables/xshared.c
+++ b/iptables/xshared.c
@@ -435,7 +435,7 @@ void add_argv(struct argv_store *store, const char *what, int quoted)
 		xtables_error(PARAMETER_PROBLEM,
 			      "Trying to store NULL argument\n");
 
-	store->argv[store->argc] = strdup(what);
+	store->argv[store->argc] = xtables_strdup(what);
 	store->argvattr[store->argc] = quoted;
 	store->argv[++store->argc] = NULL;
 }