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/* 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);
}
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