This commit was generated by cvs2svn to compensate for changes in r786,

[libnl.git] / src / nl-link-name2ifindex.c

diff --git a/src/nl-link-name2ifindex.c b/src/nl-link-name2ifindex.c
new file mode 100644 (file)
index 0000000..6ed146f
--- /dev/null
+++ b/src/nl-link-name2ifindex.c
@@ -0,0 +1,51 @@
+/*
+ * src/nl-link-name2ifindex.c     Transform a interface name to its index
+ *
+ *     This library is free software; you can redistribute it and/or
+ *     modify it under the terms of the GNU Lesser General Public
+ *     License as published by the Free Software Foundation version 2.1
+ *     of the License.
+ *
+ * Copyright (c) 2003-2006 Thomas Graf <tgraf@suug.ch>
+ */
+
+#include "utils.h"
+
+int main(int argc, char *argv[])
+{
+       struct nl_handle *nlh;
+       struct nl_cache *link_cache;
+       int err = -1, ifindex;
+
+       if (nltool_init(argc, argv) < 0)
+               return -1;
+
+       if (argc < 2 || !strcmp(argv[1], "-h")) {
+               printf("Usage: nl-link-name2ifindex <name>\n");
+               return -1;
+       }
+
+       nlh = nl_handle_alloc_nondefault(nltool_cbset);
+       if (!nlh)
+               return -1;
+
+       if (nltool_connect(nlh, NETLINK_ROUTE) < 0)
+               goto errout;
+
+       link_cache = nltool_alloc_link_cache(nlh);
+       if (!link_cache)
+               goto errout;
+
+       if ((ifindex = rtnl_link_name2i(link_cache, argv[1])) == RTNL_LINK_NOT_FOUND)
+               fprintf(stderr, "Interface %s does not exist\n", argv[1]);
+       else
+               printf("%d\n", ifindex);
+
+       nl_cache_free(link_cache);
+       err = 0;
+errout:
+       nl_close(nlh);
+       nl_handle_destroy(nlh);
+
+       return err;
+}