CLI - Command Line Interface Library

Moved common code in src/ used by CLI tools to src/lib/ for possible use
by other CLI tools. Just link to libnl-cli.{so|la}

1 files changed, 147 insertions, 0 deletions

diff --git a/src/lib/utils.c b/src/lib/utils.c
new file mode 100644
index 0000000..02a7be1
--- /dev/null
+++ b/src/lib/utils.c
@@ -0,0 +1,147 @@
+/*
+ * src/utils.c		Utilities
+ *
+ *	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) 2003-2009 Thomas Graf <tgraf@suug.ch>
+ */
+
+/**
+ * @defgroup cli Command Line Interface API
+ *
+ * @{
+ */
+
+#include <netlink/cli/utils.h>
+
+uint32_t nl_cli_parse_u32(const char *arg)
+{
+	unsigned long lval;
+	char *endptr;
+
+	lval = strtoul(arg, &endptr, 0);
+	if (endptr == arg || lval == ULONG_MAX)
+		nl_cli_fatal(EINVAL, "Unable to parse \"%s\", not a number.",
+			     arg);
+
+	return (uint32_t) lval;
+}
+
+void nl_cli_print_version(void)
+{
+	printf("libnl tools version %s\n", LIBNL_VERSION);
+	printf(
+	"Copyright (C) 2003-2009 Thomas Graf <tgraf@redhat.com>\n"
+	"\n"
+	"This program comes with ABSOLUTELY NO WARRANTY. This is free \n"
+	"software, and you are welcome to redistribute it under certain\n"
+	"conditions. See the GNU General Public License for details.\n"
+	);
+
+	exit(0);
+}
+
+void nl_cli_fatal(int err, const char *fmt, ...)
+{
+	va_list ap;
+
+	fprintf(stderr, "Error: ");
+
+	if (fmt) {
+		va_start(ap, fmt);
+		vfprintf(stderr, fmt, ap);
+		va_end(ap);
+		fprintf(stderr, "\n");
+	} else
+		fprintf(stderr, "%s\n", strerror(err));
+
+	exit(abs(err));
+}
+
+int nl_cli_connect(struct nl_sock *sk, int protocol)
+{
+	int err;
+
+	if ((err = nl_connect(sk, protocol)) < 0)
+		nl_cli_fatal(err, "Unable to connect netlink socket: %s",
+			     nl_geterror(err));
+
+	return err;
+}
+
+struct nl_sock *nl_cli_alloc_socket(void)
+{
+	struct nl_sock *sock;
+
+	if (!(sock = nl_socket_alloc()))
+		nl_cli_fatal(ENOBUFS, "Unable to allocate netlink socket");
+
+	return sock;
+}
+
+struct nl_addr *nl_cli_addr_parse(const char *str, int family)
+{
+	struct nl_addr *addr;
+	int err;
+
+	if ((err = nl_addr_parse(str, family, &addr)) < 0)
+		nl_cli_fatal(err, "Unable to parse address \"%s\": %s",
+			     str, nl_geterror(err));
+
+	return addr;
+}
+
+int nl_cli_parse_dumptype(const char *str)
+{
+	if (!strcasecmp(str, "brief"))
+		return NL_DUMP_LINE;
+	else if (!strcasecmp(str, "details") || !strcasecmp(str, "detailed"))
+		return NL_DUMP_DETAILS;
+	else if (!strcasecmp(str, "stats"))
+		return NL_DUMP_STATS;
+	else if (!strcasecmp(str, "env"))
+		return NL_DUMP_ENV;
+	else
+		nl_cli_fatal(EINVAL, "Invalid dump type \"%s\".\n", str);
+
+	return 0;
+}
+
+int nl_cli_confirm(struct nl_object *obj, struct nl_dump_params *params,
+		   int default_yes)
+{
+	int answer;
+
+	nl_object_dump(obj, params);
+	printf("Delete? (%c/%c) ",
+		default_yes ? 'Y' : 'y',
+		default_yes ? 'n' : 'N');
+
+	do {
+		answer = tolower(getchar());
+		if (answer == '\n')
+			answer = default_yes ? 'y' : 'n';
+	} while (answer != 'y' && answer != 'n');
+
+	return answer == 'y';
+}
+
+struct nl_cache *nl_cli_alloc_cache(struct nl_sock *sock, const char *name,
+			    int (*ac)(struct nl_sock *, struct nl_cache **))
+{
+	struct nl_cache *cache;
+	int err;
+
+	if ((err = ac(sock, &cache)) < 0)
+		nl_cli_fatal(err, "Unable to allocate %s cache: %s",
+			     name, nl_geterror(err));
+
+	nl_cache_mngt_provide(cache);
+
+	return cache;
+}
+
+/** @} */