cli.c

   1 /*
   2  * Copyright (C) 2008 Felix Fietkau <nbd@openwrt.org>
   3  *
   4  * This program is free software; you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License version 2
   6  * as published by the Free Software Foundation
   7  *
   8  * This program is distributed in the hope that it will be useful,
   9  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  10  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  11  * GNU General Public License for more details.
  12  */
  13 #include <strings.h>
  14 #include <stdlib.h>
  15 #include "uci.h"
  16
  17 static struct uci_context *ctx;
  18 static char *buf = NULL;
  19 static int buflen = 256;
  20
  21 static void uci_usage(int argc, char **argv)
  22 {
  23         fprintf(stderr,
  24                 "Usage: %s [<options>] <command> [<arguments>]\n\n"
  25                 "Commands:\n"
  26                 "\tshow [<config>[.<section>[.<option>]]]\n"
  27                 "\texport [<config>]\n"
  28                 "\n",
  29                 argv[0]
  30         );
  31         exit(255);
  32 }
  33
  34 static char *uci_escape(char *str)
  35 {
  36         char *s, *p, *t;
  37         int pos = 0;
  38
  39         if (!buf)
  40                 buf = malloc(buflen);
  41
  42         s = str;
  43         p = strchr(str, '\'');
  44         if (!p)
  45                 return str;
  46
  47         do {
  48                 int len = p - s;
  49                 if (len > 0) {
  50                         if (p + 3 - str >= buflen) {
  51                                 buflen *= 2;
  52                                 buf = realloc(buf, buflen);
  53                                 if (!buf) {
  54                                         fprintf(stderr, "Out of memory\n");
  55                                         exit(255);
  56                                 }
  57                         }
  58                         memcpy(&buf[pos], s, len);
  59                         pos += len;
  60                 }
  61                 strcpy(&buf[pos], "'\\''");
  62                 pos += 3;
  63                 s = p + 1;
  64         } while ((p = strchr(s, '\'')));
  65
  66         return buf;
  67 }
  68
  69 static void uci_show_section(struct uci_section *p)
  70 {
  71         struct uci_option *o;
  72         const char *cname, *sname;
  73
  74         cname = p->config->name;
  75         sname = p->name;
  76         printf("%s.%s=%s\n", cname, sname, p->type);
  77         uci_foreach_entry(option, &p->options, o) {
  78                 printf("%s.%s.%s=%s\n", cname, sname, o->name, o->value);
  79         }
  80 }
  81
  82 static void uci_export_section(struct uci_section *p)
  83 {
  84         struct uci_option *o;
  85         const char *name;
  86
  87         printf("\nconfig '%s'", uci_escape(p->type));
  88         printf(" '%s'\n", uci_escape(p->name));
  89         uci_foreach_entry(option, &p->options, o) {
  90                 printf("\toption '%s'", uci_escape(o->name));
  91                 printf(" '%s'\n", uci_escape(o->value));
  92         }
  93 }
  94
  95 static void foreach_section(const char *configname, const char *section, void (*callback)(struct uci_section *))
  96 {
  97         struct uci_config *cfg;
  98         struct uci_section *p;
  99
 100         if (uci_load(ctx, configname, &cfg) != UCI_OK) {
 101                 uci_perror(ctx, "uci_load");
 102                 return;
 103         }
 104
 105         uci_list_empty(&cfg->sections);
 106         uci_foreach_entry(section, &cfg->sections, p) {
 107                 if (!section || !strcmp(p->name, section))
 108                         callback(p);
 109         }
 110         uci_unload(ctx, configname);
 111 }
 112
 113 static int uci_show(int argc, char **argv)
 114 {
 115         char **configs = uci_list_configs();
 116         char **p;
 117
 118         if (!configs)
 119                 return 0;
 120
 121         for (p = configs; *p; p++) {
 122                 if ((argc < 2) || !strcmp(argv[1], *p))
 123                         foreach_section(*p, (argc > 2 ? argv[2] : NULL), uci_show_section);
 124         }
 125
 126         return 0;
 127 }
 128
 129 static int uci_export(int argc, char **argv)
 130 {
 131         char **configs = uci_list_configs();
 132         char **p;
 133
 134         if (!configs)
 135                 return 0;
 136
 137         for (p = configs; *p; p++) {
 138                 if ((argc < 2) || !strcmp(argv[1], *p)) {
 139                         printf("package '%s'\n", uci_escape(*p));
 140                         foreach_section(*p, NULL, uci_export_section);
 141                         printf("\n");
 142                 }
 143         }
 144         return 0;
 145 }
 146
 147 static int uci_cmd(int argc, char **argv)
 148 {
 149         if (!strcasecmp(argv[0], "show"))
 150                 return uci_show(argc, argv);
 151         if (!strcasecmp(argv[0], "export"))
 152                 return uci_export(argc, argv);
 153         return 255;
 154 }
 155
 156 int main(int argc, char **argv)
 157 {
 158         int ret;
 159
 160         ctx = uci_alloc();
 161         if (argc < 2)
 162                 uci_usage(argc, argv);
 163         ret = uci_cmd(argc - 1, argv + 1);
 164         if (ret == 255)
 165                 uci_usage(argc, argv);
 166         uci_free(ctx);
 167
 168         return ret;
 169 }