projects / mirror_iproute2.git / blame
| Commit | Line | Data |
|---|---|---|
| f043759d RA |
1 | /* |
| 2 | * cmdl.c Framework for handling command line options. | |
| 3 | * | |
| 4 | * This program is free software; you can redistribute it and/or | |
| 5 | * modify it under the terms of the GNU General Public License | |
| 6 | * as published by the Free Software Foundation; either version | |
| 7 | * 2 of the License, or (at your option) any later version. | |
| 8 | * | |
| 9 | * Authors: Richard Alpe <richard.alpe@ericsson.com> | |
| 10 | */ | |
| 11 | ||
| 12 | #include <stdio.h> | |
| 13 | #include <string.h> | |
| 14 | #include <errno.h> | |
| 15 | ||
| 16 | #include <libmnl/libmnl.h> | |
| 17 | ||
| 18 | #include "cmdl.h" | |
| 19 | ||
| 20 | const struct cmd *find_cmd(const struct cmd *cmds, char *str) | |
| 21 | { | |
| 22 | const struct cmd *c; | |
| 23 | const struct cmd *match = NULL; | |
| 24 | ||
| 25 | for (c = cmds; c->cmd; c++) { | |
| 26 | if (strstr(c->cmd, str) != c->cmd) | |
| 27 | continue; | |
| 28 | if (match) | |
| 29 | return NULL; | |
| 30 | match = c; | |
| 31 | } | |
| 32 | ||
| 33 | return match; | |
| 34 | } | |
| 35 | ||
| 36 | static struct opt *find_opt(struct opt *opts, char *str) | |
| 37 | { | |
| 38 | struct opt *o; | |
| 39 | struct opt *match = NULL; | |
| 40 | ||
| 41 | for (o = opts; o->key; o++) { | |
| 42 | if (strstr(o->key, str) != o->key) | |
| 43 | continue; | |
| 44 | if (match) | |
| 45 | return NULL; | |
| 46 | ||
| 47 | match = o; | |
| 48 | } | |
| 49 | ||
| 50 | return match; | |
| 51 | } | |
| 52 | ||
| 53 | struct opt *get_opt(struct opt *opts, char *key) | |
| 54 | { | |
| 55 | struct opt *o; | |
| 56 | ||
| 57 | for (o = opts; o->key; o++) { | |
| 58 | if (strcmp(o->key, key) == 0 && o->val) | |
| 59 | return o; | |
| 60 | } | |
| 61 | ||
| 62 | return NULL; | |
| 63 | } | |
| 64 | ||
| 65 | char *shift_cmdl(struct cmdl *cmdl) | |
| 66 | { | |
| 67 | int next; | |
| 68 | ||
| 69 | if (cmdl->optind < cmdl->argc) | |
| 70 | next = (cmdl->optind)++; | |
| 71 | else | |
| 72 | next = cmdl->argc; | |
| 73 | ||
| 74 | return cmdl->argv[next]; | |
| 75 | } | |
| 76 | ||
| 77 | /* Returns the number of options parsed or a negative error code upon failure */ | |
| 78 | int parse_opts(struct opt *opts, struct cmdl *cmdl) | |
| 79 | { | |
| 80 | int i; | |
| 81 | int cnt = 0; | |
| 82 | ||
| 83 | for (i = cmdl->optind; i < cmdl->argc; i += 2) { | |
| 84 | struct opt *o; | |
| 85 | ||
| 86 | o = find_opt(opts, cmdl->argv[i]); | |
| 87 | if (!o) { | |
| 88 | fprintf(stderr, "error, invalid option \"%s\"\n", | |
| 89 | cmdl->argv[i]); | |
| 90 | return -EINVAL; | |
| 91 | } | |
| 92 | cnt++; | |
| 93 | o->val = cmdl->argv[i + 1]; | |
| 94 | cmdl->optind += 2; | |
| 95 | } | |
| 96 | ||
| 97 | return cnt; | |
| 98 | } | |
| 99 | ||
| 100 | int run_cmd(struct nlmsghdr *nlh, const struct cmd *caller, | |
| 101 | const struct cmd *cmds, struct cmdl *cmdl, void *data) | |
| 102 | { | |
| 103 | char *name; | |
| 104 | const struct cmd *cmd; | |
| 105 | ||
| 106 | if ((cmdl->optind) >= cmdl->argc) { | |
| 107 | if (caller->help) | |
| 108 | (caller->help)(cmdl); | |
| 109 | return -EINVAL; | |
| 110 | } | |
| 111 | name = cmdl->argv[cmdl->optind]; | |
| 112 | (cmdl->optind)++; | |
| 113 | ||
| 114 | cmd = find_cmd(cmds, name); | |
| 115 | if (!cmd) { | |
| 116 | /* Show help about last command if we don't find this one */ | |
| 117 | if (help_flag && caller->help) { | |
| 118 | (caller->help)(cmdl); | |
| 119 | } else { | |
| 120 | fprintf(stderr, "error, invalid command \"%s\"\n", name); | |
| 121 | fprintf(stderr, "use --help for command help\n"); | |
| 122 | } | |
| 123 | return -EINVAL; | |
| 124 | } | |
| 125 | ||
| 126 | return (cmd->func)(nlh, cmd, cmdl, data); | |
| 127 | } |