| /* |
| * cmdl.c Framework for handling command line options. |
| * |
| * This program is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU General Public License |
| * as published by the Free Software Foundation; either version |
| * 2 of the License, or (at your option) any later version. |
| * |
| * Authors: Richard Alpe <richard.alpe@ericsson.com> |
| */ |
| |
| #include <stdio.h> |
| #include <string.h> |
| #include <errno.h> |
| |
| #include <libmnl/libmnl.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; |
| } |
| |
| static 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); |
| } |