GRUB2/grub-2.04/grub-core/ventoy/ventoy_plugin.c

   1 /******************************************************************************
   2  * ventoy_plugin.c
   3  *
   4  * Copyright (c) 2020, longpanda <admin@ventoy.net>
   5  *
   6  * This program is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU General Public License as
   8  * published by the Free Software Foundation; either version 3 of the
   9  * License, or (at your option) any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful, but
  12  * WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program; if not, see <http://www.gnu.org/licenses/>.
  18  *
  19  */
  20 #include <grub/types.h>
  21 #include <grub/misc.h>
  22 #include <grub/mm.h>
  23 #include <grub/err.h>
  24 #include <grub/dl.h>
  25 #include <grub/disk.h>
  26 #include <grub/device.h>
  27 #include <grub/term.h>
  28 #include <grub/partition.h>
  29 #include <grub/file.h>
  30 #include <grub/normal.h>
  31 #include <grub/extcmd.h>
  32 #include <grub/datetime.h>
  33 #include <grub/i18n.h>
  34 #include <grub/net.h>
  35 #include <grub/time.h>
  36 #include <grub/ventoy.h>
  37 #include "ventoy_def.h"
  38
  39 GRUB_MOD_LICENSE ("GPLv3+");
  40
  41 static install_template *g_install_template_head = NULL;
  42
  43 static int ventoy_plugin_theme_entry(VTOY_JSON *json, const char *isodisk)
  44 {
  45     const char *value;
  46     char filepath[256];
  47
  48     value = vtoy_json_get_string_ex(json->pstChild, "file");
  49     if (value)
  50     {
  51         if (value[0] == '/')
  52         {
  53             grub_snprintf(filepath, sizeof(filepath), "%s%s", isodisk, value);
  54         }
  55         else
  56         {
  57             grub_snprintf(filepath, sizeof(filepath), "%s/ventoy/%s", isodisk, value);
  58         }
  59
  60         if (ventoy_is_file_exist(filepath) == 0)
  61         {
  62             debug("Theme file %s does not exist\n", filepath);
  63             return 0;
  64         }
  65
  66         debug("vtoy_theme %s\n", filepath);
  67         grub_env_set("vtoy_theme", filepath);
  68     }
  69
  70     value = vtoy_json_get_string_ex(json->pstChild, "gfxmode");
  71     if (value)
  72     {
  73         debug("vtoy_gfxmode %s\n", value);
  74         grub_env_set("vtoy_gfxmode", value);
  75     }
  76
  77     return 0;
  78 }
  79
  80
  81 static int ventoy_plugin_auto_install_entry(VTOY_JSON *json, const char *isodisk)
  82 {
  83     const char *iso = NULL;
  84     const char *script = NULL;
  85     VTOY_JSON *pNode = NULL;
  86     install_template *node = NULL;
  87     install_template *next = NULL;
  88
  89     (void)isodisk;
  90
  91     if (json->enDataType != JSON_TYPE_ARRAY)
  92     {
  93         debug("Not array %d\n", json->enDataType);
  94         return 0;
  95     }
  96
  97     if (g_install_template_head)
  98     {
  99         for (node = g_install_template_head; node; node = next)
 100         {
 101             next = node->next;
 102             grub_free(node);
 103         }
 104
 105         g_install_template_head = NULL;
 106     }
 107
 108     for (pNode = json->pstChild; pNode; pNode = pNode->pstNext)
 109     {
 110         iso = vtoy_json_get_string_ex(pNode->pstChild, "image");
 111         if (iso && iso[0] == '/')
 112         {
 113             script = vtoy_json_get_string_ex(pNode->pstChild, "template");
 114             if (script && script[0] == '/')
 115             {
 116                 node = grub_zalloc(sizeof(install_template));
 117                 if (node)
 118                 {
 119                     grub_snprintf(node->isopath, sizeof(node->isopath), "%s", iso);
 120                     grub_snprintf(node->templatepath, sizeof(node->templatepath), "%s", script);
 121
 122                     if (g_install_template_head)
 123                     {
 124                         node->next = g_install_template_head;
 125                     }
 126
 127                     g_install_template_head = node;
 128                 }
 129             }
 130         }
 131     }
 132
 133     return 0;
 134 }
 135
 136
 137 static plugin_entry g_plugin_entries[] =
 138 {
 139     { "theme", ventoy_plugin_theme_entry },
 140     { "auto_install", ventoy_plugin_auto_install_entry },
 141 };
 142
 143 static int ventoy_parse_plugin_config(VTOY_JSON *json, const char *isodisk)
 144 {
 145     int i;
 146     VTOY_JSON *cur = json;
 147
 148     while (cur)
 149     {
 150         for (i = 0; i < (int)ARRAY_SIZE(g_plugin_entries); i++)
 151         {
 152             if (grub_strcmp(g_plugin_entries[i].key, cur->pcName) == 0)
 153             {
 154                 debug("Plugin entry for %s\n", g_plugin_entries[i].key);
 155                 g_plugin_entries[i].entryfunc(cur, isodisk);
 156                 break;
 157             }
 158         }
 159
 160         cur = cur->pstNext;
 161     }
 162
 163     return 0;
 164 }
 165
 166 grub_err_t ventoy_cmd_load_plugin(grub_extcmd_context_t ctxt, int argc, char **args)
 167 {
 168     int ret = 0;
 169     char *buf = NULL;
 170     grub_file_t file;
 171     VTOY_JSON *json = NULL;
 172
 173     (void)ctxt;
 174     (void)argc;
 175
 176     file = ventoy_grub_file_open(VENTOY_FILE_TYPE, "%s/ventoy/ventoy.json", args[0]);
 177     if (!file)
 178     {
 179         return GRUB_ERR_NONE;
 180     }
 181
 182     debug("json configuration file size %d\n", (int)file->size);
 183
 184     buf = grub_malloc(file->size + 1);
 185     if (!buf)
 186     {
 187         grub_file_close(file);
 188         return 1;
 189     }
 190
 191     buf[file->size] = 0;
 192     grub_file_read(file, buf, file->size);
 193     grub_file_close(file);
 194
 195     json = vtoy_json_create();
 196     if (!json)
 197     {
 198         return 1;
 199     }
 200
 201
 202
 203     ret = vtoy_json_parse(json, buf);
 204     if (ret)
 205     {
 206         debug("Failed to parse json string %d\n", ret);
 207         grub_free(buf);
 208         return 1;
 209     }
 210
 211     ventoy_parse_plugin_config(json->pstChild, args[0]);
 212
 213     vtoy_json_destroy(json);
 214
 215     grub_free(buf);
 216
 217     VENTOY_CMD_RETURN(GRUB_ERR_NONE);
 218 }
 219
 220
 221 void ventoy_plugin_dump_auto_install(void)
 222 {
 223     install_template *node = NULL;
 224
 225     for (node = g_install_template_head; node; node = node->next)
 226     {
 227         grub_printf("IMAGE:<%s>\n", node->isopath);
 228         grub_printf("SCRIPT:<%s>\n\n", node->templatepath);
 229     }
 230
 231     return;
 232 }
 233
 234
 235 char * ventoy_plugin_get_install_template(const char *isopath)
 236 {
 237     install_template *node = NULL;
 238
 239     for (node = g_install_template_head; node; node = node->next)
 240     {
 241         if (grub_strcmp(node->isopath, isopath) == 0)
 242         {
 243             return node->templatepath;
 244         }
 245     }
 246
 247     return NULL;
 248 }
 249