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shell_startup.c 10 KB

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  1. /*
  2. * shell_startup.c
  3. */
  4. #include "private.h"
  5. #include <assert.h>
  6. #include "lub/string.h"
  7. /* Default hooks */
  8. const char* clish_plugin_default_hook[] = {
  9. NULL,
  10. "clish_script@clish",
  11. NULL,
  12. "clish_hook_config@clish",
  13. "clish_hook_log@clish"
  14. };
  15. /*----------------------------------------------------------- */
  16. int clish_shell_startup(clish_shell_t *this)
  17. {
  18. const char *banner;
  19. clish_context_t context;
  20. if (!this->startup) {
  21. fprintf(stderr, "Error: Can't get valid STARTUP tag.\n");
  22. return -1;
  23. }
  24. /* Prepare context */
  25. clish_context_init(&context, this);
  26. clish_context__set_cmd(&context, this->startup);
  27. clish_context__set_action(&context,
  28. clish_command__get_action(this->startup));
  29. banner = clish_command__get_detail(this->startup);
  30. if (banner)
  31. tinyrl_printf(this->tinyrl, "%s\n", banner);
  32. /* Call log initialize */
  33. if (clish_shell__get_log(this))
  34. clish_shell_exec_log(&context, NULL, 0);
  35. /* Call startup script */
  36. return clish_shell_execute(&context, NULL);
  37. }
  38. /*----------------------------------------------------------- */
  39. void clish_shell__set_startup_view(clish_shell_t *this, const char *viewname)
  40. {
  41. clish_view_t *view;
  42. assert(this);
  43. assert(this->startup);
  44. /* Search for the view */
  45. view = clish_shell_find_view(this, viewname);
  46. assert(view);
  47. clish_command__force_viewname(this->startup, viewname);
  48. }
  49. /*----------------------------------------------------------- */
  50. void clish_shell__set_startup_viewid(clish_shell_t *this, const char *viewid)
  51. {
  52. assert(this);
  53. assert(this->startup);
  54. clish_command__force_viewid(this->startup, viewid);
  55. }
  56. /*-------------------------------------------------------- */
  57. /* Resolve PTYPE for given PARAM.
  58. */
  59. static clish_ptype_t * resolve_ptype(clish_shell_t *this, clish_param_t *param)
  60. {
  61. clish_ptype_t *ptype = NULL;
  62. if (!this || !param)
  63. return NULL;
  64. /* Resolve PARAM's PTYPE */
  65. ptype = clish_shell_find_ptype(this, clish_param__get_ptype_name(param));
  66. if (!ptype) {
  67. fprintf(stderr, "Error: Unresolved PTYPE \"%s\" in PARAM \"%s\"\n",
  68. clish_param__get_ptype_name(param),
  69. clish_param__get_name(param));
  70. return NULL;
  71. }
  72. clish_param__set_ptype(param, ptype);
  73. clish_param__set_ptype_name(param, NULL); /* Free some memory */
  74. return ptype;
  75. }
  76. /*-------------------------------------------------------- */
  77. /* Static recursive function to iterate parameters. Logically it's the
  78. * part of clish_shell_prepare() function.
  79. */
  80. static int iterate_paramv(clish_shell_t *this, clish_paramv_t *paramv,
  81. clish_hook_access_fn_t *access_fn)
  82. {
  83. int i = 0;
  84. clish_param_t *param;
  85. while((param = clish_paramv__get_param(paramv, i))) {
  86. clish_paramv_t *nested_paramv;
  87. /* Resolve PARAM's PTYPE */
  88. if (!resolve_ptype(this, param))
  89. return -1;
  90. /* Check access for PARAM */
  91. if (access_fn && clish_param__get_access(param) &&
  92. access_fn(this, clish_param__get_access(param))) {
  93. #ifdef DEBUG
  94. fprintf(stderr, "Warning: Access denied. Remove PARAM \"%s\"\n",
  95. clish_param__get_name(param));
  96. #endif
  97. if (clish_paramv_remove(paramv, i) < 0) {
  98. fprintf(stderr, "Error: Some system problem\n");
  99. return -1;
  100. }
  101. clish_param_delete(param);
  102. continue; /* Don't increment index */
  103. }
  104. /* Recursive iterate nested PARAMs */
  105. nested_paramv = clish_param__get_paramv(param);
  106. if (iterate_paramv(this, nested_paramv, access_fn) < 0)
  107. return -1;
  108. i++;
  109. }
  110. return 0;
  111. }
  112. /*-------------------------------------------------------- */
  113. /* This function prepares schema for execution. It loads
  114. * plugins, link unresolved symbols, then iterates all the
  115. * objects and link them to each other, check access
  116. * permissions. Don't execute clish_shell_startup() without this
  117. * function.
  118. */
  119. int clish_shell_prepare(clish_shell_t *this)
  120. {
  121. clish_command_t *cmd;
  122. clish_view_t *view;
  123. clish_nspace_t *nspace;
  124. lub_bintree_t *view_tree, *cmd_tree;
  125. lub_list_t *nspace_tree;
  126. lub_bintree_iterator_t cmd_iter, view_iter;
  127. lub_list_node_t *nspace_iter;
  128. clish_hook_access_fn_t *access_fn = NULL;
  129. clish_paramv_t *paramv;
  130. int i = 0;
  131. /* Add statically linked plugins */
  132. while (clish_plugin_builtin_list[i].name) {
  133. clish_plugin_t *plugin;
  134. plugin = clish_shell_find_create_plugin(this,
  135. clish_plugin_builtin_list[i].name);
  136. clish_plugin__set_init(plugin,
  137. clish_plugin_builtin_list[i].init);
  138. clish_plugin__set_builtin_flag(plugin, BOOL_TRUE);
  139. i++;
  140. }
  141. /* Add default plugin to the list of plugins */
  142. if (this->default_plugin) {
  143. clish_shell_find_create_plugin(this, "clish");
  144. /* Default hooks */
  145. for (i = 0; i < CLISH_SYM_TYPE_MAX; i++) {
  146. if (this->hooks_use[i])
  147. continue;
  148. if (!clish_plugin_default_hook[i])
  149. continue;
  150. clish_sym__set_name(this->hooks[i],
  151. clish_plugin_default_hook[i]);
  152. }
  153. }
  154. /* Add default syms to unresolved table */
  155. for (i = 0; i < CLISH_SYM_TYPE_MAX; i++) {
  156. if (clish_sym__get_name(this->hooks[i]))
  157. lub_list_add(this->syms, this->hooks[i]);
  158. }
  159. /* Load plugins and link symbols */
  160. if (clish_shell_load_plugins(this) < 0)
  161. return -1;
  162. if (clish_shell_link_plugins(this) < 0)
  163. return -1;
  164. access_fn = clish_sym__get_func(clish_shell_get_hook(this, CLISH_SYM_TYPE_ACCESS));
  165. /* Iterate the VIEWs */
  166. view_tree = &this->view_tree;
  167. view = lub_bintree_findfirst(view_tree);
  168. for (lub_bintree_iterator_init(&view_iter, view_tree, view);
  169. view; view = lub_bintree_iterator_next(&view_iter)) {
  170. /* Check access rights for the VIEW */
  171. if (access_fn && clish_view__get_access(view) &&
  172. access_fn(this, clish_view__get_access(view))) {
  173. #ifdef DEBUG
  174. fprintf(stderr, "Warning: Access denied. Remove VIEW \"%s\"\n",
  175. clish_view__get_name(view));
  176. #endif
  177. lub_bintree_remove(view_tree, view);
  178. clish_view_delete(view);
  179. continue;
  180. }
  181. /* Iterate the NAMESPACEs */
  182. nspace_tree = clish_view__get_nspaces(view);
  183. nspace_iter = lub_list__get_head(nspace_tree);
  184. while(nspace_iter) {
  185. clish_view_t *ref_view;
  186. lub_list_node_t *old_nspace_iter;
  187. nspace = (clish_nspace_t *)lub_list_node__get_data(nspace_iter);
  188. old_nspace_iter = nspace_iter;
  189. nspace_iter = lub_list_node__get_next(nspace_iter);
  190. /* Resolve NAMESPACEs and remove unresolved ones */
  191. ref_view = clish_shell_find_view(this, clish_nspace__get_view_name(nspace));
  192. if (!ref_view) {
  193. #ifdef DEBUG
  194. fprintf(stderr, "Warning: Remove unresolved NAMESPACE \"%s\" from \"%s\" VIEW\n",
  195. clish_nspace__get_view_name(nspace), clish_view__get_name(view));
  196. #endif
  197. lub_list_del(nspace_tree, old_nspace_iter);
  198. lub_list_node_free(old_nspace_iter);
  199. clish_nspace_delete(nspace);
  200. continue;
  201. }
  202. clish_nspace__set_view(nspace, ref_view);
  203. clish_nspace__set_view_name(nspace, NULL); /* Free some memory */
  204. /* Check access rights for the NAMESPACE */
  205. if (access_fn && (
  206. /* Check NAMESPASE owned access */
  207. (clish_nspace__get_access(nspace) && access_fn(this, clish_nspace__get_access(nspace)))
  208. ||
  209. /* Check referenced VIEW's access */
  210. (clish_view__get_access(ref_view) && access_fn(this, clish_view__get_access(ref_view)))
  211. )) {
  212. #ifdef DEBUG
  213. fprintf(stderr, "Warning: Access denied. Remove NAMESPACE \"%s\" from \"%s\" VIEW\n",
  214. clish_nspace__get_view_name(nspace), clish_view__get_name(view));
  215. #endif
  216. lub_list_del(nspace_tree, old_nspace_iter);
  217. lub_list_node_free(old_nspace_iter);
  218. clish_nspace_delete(nspace);
  219. continue;
  220. }
  221. }
  222. /* Iterate the COMMANDs */
  223. cmd_tree = clish_view__get_tree(view);
  224. cmd = lub_bintree_findfirst(cmd_tree);
  225. for (lub_bintree_iterator_init(&cmd_iter, cmd_tree, cmd);
  226. cmd; cmd = lub_bintree_iterator_next(&cmd_iter)) {
  227. int cmd_is_alias = clish_command__get_alias(cmd)?1:0;
  228. clish_param_t *args = NULL;
  229. /* Check access rights for the COMMAND */
  230. if (access_fn && clish_command__get_access(cmd) &&
  231. access_fn(this, clish_command__get_access(cmd))) {
  232. #ifdef DEBUG
  233. fprintf(stderr, "Warning: Access denied. Remove COMMAND \"%s\" from VIEW \"%s\"\n",
  234. clish_command__get_name(cmd), clish_view__get_name(view));
  235. #endif
  236. lub_bintree_remove(cmd_tree, cmd);
  237. clish_command_delete(cmd);
  238. continue;
  239. }
  240. /* Resolve command aliases */
  241. if (cmd_is_alias) {
  242. clish_view_t *aview;
  243. clish_command_t *cmdref;
  244. const char *alias_view = clish_command__get_alias_view(cmd);
  245. if (!alias_view)
  246. aview = clish_command__get_pview(cmd);
  247. else
  248. aview = clish_shell_find_view(this, alias_view);
  249. if (!aview /* Removed or broken VIEW */
  250. ||
  251. /* Removed or broken referenced COMMAND */
  252. !(cmdref = clish_view_find_command(aview, clish_command__get_alias(cmd), BOOL_FALSE))
  253. ) {
  254. #ifdef DEBUG
  255. fprintf(stderr, "Warning: Remove unresolved link \"%s\" from \"%s\" VIEW\n",
  256. clish_command__get_name(cmd), clish_view__get_name(view));
  257. #endif
  258. lub_bintree_remove(cmd_tree, cmd);
  259. clish_command_delete(cmd);
  260. continue;
  261. /*fprintf(stderr, CLISH_XML_ERROR_STR"Broken VIEW for alias \"%s\"\n",
  262. clish_command__get_name(cmd));
  263. return -1; */
  264. /*fprintf(stderr, CLISH_XML_ERROR_STR"Broken alias \"%s\"\n",
  265. clish_command__get_name(cmd));
  266. return -1; */
  267. }
  268. if (!clish_command_alias_to_link(cmd, cmdref)) {
  269. fprintf(stderr, CLISH_XML_ERROR_STR"Something wrong with alias \"%s\"\n",
  270. clish_command__get_name(cmd));
  271. return -1;
  272. }
  273. /* Check access rights for newly constructed COMMAND.
  274. Now the link has access filed from referenced command.
  275. */
  276. if (access_fn && clish_command__get_access(cmd) &&
  277. access_fn(this, clish_command__get_access(cmd))) {
  278. #ifdef DEBUG
  279. fprintf(stderr, "Warning: Access denied. Remove COMMAND \"%s\" from VIEW \"%s\"\n",
  280. clish_command__get_name(cmd), clish_view__get_name(view));
  281. #endif
  282. lub_bintree_remove(cmd_tree, cmd);
  283. clish_command_delete(cmd);
  284. continue;
  285. }
  286. }
  287. if (cmd_is_alias) /* Don't duplicate paramv processing for aliases */
  288. continue;
  289. /* Iterate PARAMeters */
  290. paramv = clish_command__get_paramv(cmd);
  291. if (iterate_paramv(this, paramv, access_fn) < 0)
  292. return -1;
  293. /* Resolve PTYPE for args */
  294. if ((args = clish_command__get_args(cmd))) {
  295. if (!resolve_ptype(this, args))
  296. return -1;
  297. }
  298. }
  299. }
  300. return 0;
  301. }
  302. CLISH_SET_STR(shell, default_shebang);
  303. CLISH_GET_STR(shell, default_shebang);