multi binary: allow subcommand via argv[1]
libtool does not play well with symlinks when trying to run commands
in the build directory. So provide an alternate way to call
iptables-multi: when argv[0] is not a recognized name, inspect [1]
for an alternate identifer.
Signed-off-by: Jan Engelhardt <jengelh@medozas.de>
diff --git a/iptables-multi.c b/iptables-multi.c
index 28c1737..4dcc26d 100644
--- a/iptables-multi.c
+++ b/iptables-multi.c
@@ -8,29 +8,43 @@
int iptables_restore_main(int argc, char **argv);
int iptables_xml_main(int argc, char **argv);
-int main(int argc, char **argv) {
- char *progname;
+int main(int argc, char **argv)
+{
+ char *progname;
- if (argc == 0) {
- fprintf(stderr, "no argv[0]?");
- exit(1);
- } else {
- progname = basename(argv[0]);
+ if (argc < 1) {
+ fprintf(stderr, "ERROR: This should not happen.\n");
+ exit(EXIT_FAILURE);
+ }
- if (!strcmp(progname, "iptables") ||
- strcmp(progname, "iptables-static") == 0)
- return iptables_main(argc, argv);
-
- if (!strcmp(progname, "iptables-save"))
- return iptables_save_main(argc, argv);
-
- if (!strcmp(progname, "iptables-restore"))
- return iptables_restore_main(argc, argv);
-
- if (!strcmp(progname, "iptables-xml"))
- return iptables_xml_main(argc, argv);
-
- fprintf(stderr, "iptables multi-purpose version: unknown applet name %s\n", progname);
- exit(1);
- }
+ progname = basename(argv[0]);
+ if (strcmp(progname, "iptables") == 0)
+ return iptables_main(argc, argv);
+ if (strcmp(progname, "iptables-save") == 0)
+ return iptables_save_main(argc, argv);
+ if (strcmp(progname, "iptables-restore") == 0)
+ return iptables_restore_main(argc, argv);
+ if (strcmp(progname, "iptables-xml") == 0)
+ return iptables_xml_main(argc, argv);
+
+ ++argv;
+ --argc;
+ if (argc < 1) {
+ fprintf(stderr, "ERROR: No subcommand given.\n");
+ exit(EXIT_FAILURE);
+ }
+
+ progname = basename(argv[0]);
+ if (strcmp(progname, "main") == 0)
+ return iptables_main(argc, argv);
+ if (strcmp(progname, "save") == 0)
+ return iptables_save_main(argc, argv);
+ if (strcmp(progname, "restore") == 0)
+ return iptables_restore_main(argc, argv);
+ if (strcmp(progname, "xml") == 0)
+ return iptables_xml_main(argc, argv);
+
+ fprintf(stderr, "iptables multi-purpose version: "
+ "unknown subcommand \"%s\"\n", progname);
+ exit(EXIT_FAILURE);
}