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-rw-r--r--tipc/cmdl.c130
1 files changed, 130 insertions, 0 deletions
diff --git a/tipc/cmdl.c b/tipc/cmdl.c
new file mode 100644
index 0000000..152ddb5
--- /dev/null
+++ b/tipc/cmdl.c
@@ -0,0 +1,130 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
+ * cmdl.c Framework for handling command line options.
+ *
+ * Authors: Richard Alpe <richard.alpe@ericsson.com>
+ */
+
+#include <stdio.h>
+#include <string.h>
+#include <errno.h>
+
+#include "cmdl.h"
+
+static const struct cmd *find_cmd(const struct cmd *cmds, char *str)
+{
+ const struct cmd *c;
+ const struct cmd *match = NULL;
+
+ for (c = cmds; c->cmd; c++) {
+ if (strstr(c->cmd, str) != c->cmd)
+ continue;
+ if (match)
+ return NULL;
+ match = c;
+ }
+
+ return match;
+}
+
+struct opt *find_opt(struct opt *opts, char *str)
+{
+ struct opt *o;
+ struct opt *match = NULL;
+
+ for (o = opts; o->key; o++) {
+ if (strstr(o->key, str) != o->key)
+ continue;
+ if (match)
+ return NULL;
+
+ match = o;
+ }
+
+ return match;
+}
+
+struct opt *get_opt(struct opt *opts, char *key)
+{
+ struct opt *o;
+
+ for (o = opts; o->key; o++) {
+ if (strcmp(o->key, key) == 0 && o->val)
+ return o;
+ }
+
+ return NULL;
+}
+
+bool has_opt(struct opt *opts, char *key)
+{
+ return get_opt(opts, key) ? true : false;
+}
+
+char *shift_cmdl(struct cmdl *cmdl)
+{
+ int next;
+
+ if (cmdl->optind < cmdl->argc)
+ next = (cmdl->optind)++;
+ else
+ next = cmdl->argc;
+
+ return cmdl->argv[next];
+}
+
+/* Returns the number of options parsed or a negative error code upon failure */
+int parse_opts(struct opt *opts, struct cmdl *cmdl)
+{
+ int i;
+ int cnt = 0;
+
+ for (i = cmdl->optind; i < cmdl->argc; i++) {
+ struct opt *o;
+
+ o = find_opt(opts, cmdl->argv[i]);
+ if (!o) {
+ fprintf(stderr, "error, invalid option \"%s\"\n",
+ cmdl->argv[i]);
+ return -EINVAL;
+ }
+ if (o->flag & OPT_KEYVAL) {
+ cmdl->optind++;
+ i++;
+ }
+ cnt++;
+ o->val = cmdl->argv[i];
+ cmdl->optind++;
+ }
+
+ return cnt;
+}
+
+int run_cmd(struct nlmsghdr *nlh, const struct cmd *caller,
+ const struct cmd *cmds, struct cmdl *cmdl, void *data)
+{
+ char *name;
+ const struct cmd *cmd;
+
+ if ((cmdl->optind) >= cmdl->argc) {
+ if (caller->help)
+ (caller->help)(cmdl);
+ return -EINVAL;
+ }
+ name = cmdl->argv[cmdl->optind];
+ (cmdl->optind)++;
+
+ cmd = find_cmd(cmds, name);
+ if (!cmd) {
+ /* Show help about last command if we don't find this one */
+ if (help_flag && caller->help) {
+ (caller->help)(cmdl);
+ } else {
+ fprintf(stderr, "error, invalid command \"%s\"\n", name);
+ fprintf(stderr, "use --help for command help\n");
+ }
+ return -EINVAL;
+ }
+
+ return (cmd->func)(nlh, cmd, cmdl, data);
+}