[iptables PATCH] xtables-save: Use argv[0] as program name

[Phil Sutter <phil@xxxxxx>]

Don't hard-code program names. This also fixes for bogus 'xtables-save'
name which is no longer used.

Signed-off-by: Phil Sutter <phil@xxxxxx>
---
 iptables/xtables-save.c | 21 +++++++++++----------
 1 file changed, 11 insertions(+), 10 deletions(-)

diff --git a/iptables/xtables-save.c b/iptables/xtables-save.c
index 98e004af4b1a4..b8d19705771ed 100644
--- a/iptables/xtables-save.c
+++ b/iptables/xtables-save.c
@@ -9,6 +9,7 @@
 #include "config.h"
 #include <getopt.h>
 #include <errno.h>
+#include <libgen.h>
 #include <stdio.h>
 #include <fcntl.h>
 #include <stdlib.h>
@@ -80,8 +81,8 @@ __do_output(struct nft_handle *h, const char *tablename, bool counters)
 
 	time_t now = time(NULL);
 
-	printf("# Generated by xtables-save v%s on %s",
-	       PACKAGE_VERSION, ctime(&now));
+	printf("# Generated by %s v%s on %s", prog_name,
+	       prog_vers, ctime(&now));
 	printf("*%s\n", tablename);
 
 	/* Dump out chain names first,
@@ -122,7 +123,7 @@ do_output(struct nft_handle *h, const char *tablename, bool counters)
  * rule
  */
 static int
-xtables_save_main(int family, const char *progname, int argc, char *argv[])
+xtables_save_main(int family, int argc, char *argv[])
 {
 	const struct builtin_table *tables;
 	const char *tablename = NULL;
@@ -133,7 +134,7 @@ xtables_save_main(int family, const char *progname, int argc, char *argv[])
 	FILE *file = NULL;
 	int ret, c;
 
-	xtables_globals.program_name = progname;
+	xtables_globals.program_name = basename(*argv);;
 	c = xtables_init_all(&xtables_globals, family);
 	if (c < 0) {
 		fprintf(stderr, "%s/%s Failed to initialize xtables\n",
@@ -237,12 +238,12 @@ xtables_save_main(int family, const char *progname, int argc, char *argv[])
 
 int xtables_ip4_save_main(int argc, char *argv[])
 {
-	return xtables_save_main(NFPROTO_IPV4, "iptables-save", argc, argv);
+	return xtables_save_main(NFPROTO_IPV4, argc, argv);
 }
 
 int xtables_ip6_save_main(int argc, char *argv[])
 {
-	return xtables_save_main(NFPROTO_IPV6, "ip6tables-save", argc, argv);
+	return xtables_save_main(NFPROTO_IPV6, argc, argv);
 }
 
 static int __ebt_save(struct nft_handle *h, const char *tablename, bool counters)
@@ -266,8 +267,8 @@ static int __ebt_save(struct nft_handle *h, const char *tablename, bool counters
 
 	if (first) {
 		now = time(NULL);
-		printf("# Generated by ebtables-save v%s on %s",
-		       PACKAGE_VERSION, ctime(&now));
+		printf("# Generated by %s v%s on %s", prog_name,
+		       prog_vers, ctime(&now));
 		first = false;
 	}
 	printf("*%s\n", tablename);
@@ -307,7 +308,7 @@ int xtables_eb_save_main(int argc_, char *argv_[])
 		}
 	}
 
-	xtables_globals.program_name = "ebtables-save";
+	xtables_globals.program_name = basename(*argv_);
 	c = xtables_init_all(&xtables_globals, h.family);
 	if (c < 0) {
 		fprintf(stderr, "%s/%s Failed to initialize xtables\n",
@@ -361,7 +362,7 @@ int xtables_arp_save_main(int argc, char **argv)
 	};
 	int c;
 
-	xtables_globals.program_name = "arptables-save";
+	xtables_globals.program_name = basename(*argv);;
 	c = xtables_init_all(&xtables_globals, h.family);
 	if (c < 0) {
 		fprintf(stderr, "%s/%s Failed to initialize xtables\n",
-- 
2.22.0