1
0

shell_startup.c 10 KB

123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196197198199200201202203204205206207208209210211212213214215216217218219220221222223224225226227228229230231232233234235236237238239240241242243244245246247248249250251252253254255256257258259260261262263264265266267268269270271272273274275276277278279280281282283284285286287288289290291292293294295296297298299300301302303304305306307308309310311312313314315316317318319320321322323324325326327328329330331332333334335336337338339340341
  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_list_t *view_tree, *nspace_tree;
  125. lub_list_node_t *nspace_iter, *view_iter;
  126. lub_bintree_t *cmd_tree;
  127. lub_bintree_iterator_t cmd_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_iter = lub_list_iterator_init(view_tree);
  168. while(view_iter) {
  169. lub_list_node_t *old_view_iter;
  170. view = (clish_view_t *)lub_list_node__get_data(view_iter);
  171. old_view_iter = view_iter;
  172. view_iter = lub_list_node__get_next(view_iter);
  173. /* Check access rights for the VIEW */
  174. if (access_fn && clish_view__get_access(view) &&
  175. access_fn(this, clish_view__get_access(view))) {
  176. #ifdef DEBUG
  177. fprintf(stderr, "Warning: Access denied. Remove VIEW \"%s\"\n",
  178. clish_view__get_name(view));
  179. #endif
  180. lub_list_del(view_tree, old_view_iter);
  181. lub_list_node_free(old_view_iter);
  182. clish_view_delete(view);
  183. continue;
  184. }
  185. /* Iterate the NAMESPACEs */
  186. nspace_tree = clish_view__get_nspaces(view);
  187. nspace_iter = lub_list__get_head(nspace_tree);
  188. while(nspace_iter) {
  189. clish_view_t *ref_view;
  190. lub_list_node_t *old_nspace_iter;
  191. nspace = (clish_nspace_t *)lub_list_node__get_data(nspace_iter);
  192. old_nspace_iter = nspace_iter;
  193. nspace_iter = lub_list_node__get_next(nspace_iter);
  194. /* Resolve NAMESPACEs and remove unresolved ones */
  195. ref_view = clish_shell_find_view(this, clish_nspace__get_view_name(nspace));
  196. if (!ref_view) {
  197. #ifdef DEBUG
  198. fprintf(stderr, "Warning: Remove unresolved NAMESPACE \"%s\" from \"%s\" VIEW\n",
  199. clish_nspace__get_view_name(nspace), clish_view__get_name(view));
  200. #endif
  201. lub_list_del(nspace_tree, old_nspace_iter);
  202. lub_list_node_free(old_nspace_iter);
  203. clish_nspace_delete(nspace);
  204. continue;
  205. }
  206. clish_nspace__set_view(nspace, ref_view);
  207. clish_nspace__set_view_name(nspace, NULL); /* Free some memory */
  208. /* Check access rights for the NAMESPACE */
  209. if (access_fn && (
  210. /* Check NAMESPASE owned access */
  211. (clish_nspace__get_access(nspace) && access_fn(this, clish_nspace__get_access(nspace)))
  212. ||
  213. /* Check referenced VIEW's access */
  214. (clish_view__get_access(ref_view) && access_fn(this, clish_view__get_access(ref_view)))
  215. )) {
  216. #ifdef DEBUG
  217. fprintf(stderr, "Warning: Access denied. Remove NAMESPACE \"%s\" from \"%s\" VIEW\n",
  218. clish_nspace__get_view_name(nspace), clish_view__get_name(view));
  219. #endif
  220. lub_list_del(nspace_tree, old_nspace_iter);
  221. lub_list_node_free(old_nspace_iter);
  222. clish_nspace_delete(nspace);
  223. continue;
  224. }
  225. }
  226. /* Iterate the COMMANDs */
  227. cmd_tree = clish_view__get_tree(view);
  228. cmd = lub_bintree_findfirst(cmd_tree);
  229. for (lub_bintree_iterator_init(&cmd_iter, cmd_tree, cmd);
  230. cmd; cmd = lub_bintree_iterator_next(&cmd_iter)) {
  231. int cmd_is_alias = clish_command__get_alias(cmd)?1:0;
  232. clish_param_t *args = NULL;
  233. /* Check access rights for the COMMAND */
  234. if (access_fn && clish_command__get_access(cmd) &&
  235. access_fn(this, clish_command__get_access(cmd))) {
  236. #ifdef DEBUG
  237. fprintf(stderr, "Warning: Access denied. Remove COMMAND \"%s\" from VIEW \"%s\"\n",
  238. clish_command__get_name(cmd), clish_view__get_name(view));
  239. #endif
  240. lub_bintree_remove(cmd_tree, cmd);
  241. clish_command_delete(cmd);
  242. continue;
  243. }
  244. /* Resolve command aliases */
  245. if (cmd_is_alias) {
  246. clish_view_t *aview;
  247. clish_command_t *cmdref;
  248. const char *alias_view = clish_command__get_alias_view(cmd);
  249. if (!alias_view)
  250. aview = clish_command__get_pview(cmd);
  251. else
  252. aview = clish_shell_find_view(this, alias_view);
  253. if (!aview /* Removed or broken VIEW */
  254. ||
  255. /* Removed or broken referenced COMMAND */
  256. !(cmdref = clish_view_find_command(aview, clish_command__get_alias(cmd), BOOL_FALSE))
  257. ) {
  258. #ifdef DEBUG
  259. fprintf(stderr, "Warning: Remove unresolved link \"%s\" from \"%s\" VIEW\n",
  260. clish_command__get_name(cmd), clish_view__get_name(view));
  261. #endif
  262. lub_bintree_remove(cmd_tree, cmd);
  263. clish_command_delete(cmd);
  264. continue;
  265. /*fprintf(stderr, CLISH_XML_ERROR_STR"Broken VIEW for alias \"%s\"\n",
  266. clish_command__get_name(cmd));
  267. return -1; */
  268. /*fprintf(stderr, CLISH_XML_ERROR_STR"Broken alias \"%s\"\n",
  269. clish_command__get_name(cmd));
  270. return -1; */
  271. }
  272. if (!clish_command_alias_to_link(cmd, cmdref)) {
  273. fprintf(stderr, CLISH_XML_ERROR_STR"Something wrong with alias \"%s\"\n",
  274. clish_command__get_name(cmd));
  275. return -1;
  276. }
  277. /* Check access rights for newly constructed COMMAND.
  278. Now the link has access filed from referenced command.
  279. */
  280. if (access_fn && clish_command__get_access(cmd) &&
  281. access_fn(this, clish_command__get_access(cmd))) {
  282. #ifdef DEBUG
  283. fprintf(stderr, "Warning: Access denied. Remove COMMAND \"%s\" from VIEW \"%s\"\n",
  284. clish_command__get_name(cmd), clish_view__get_name(view));
  285. #endif
  286. lub_bintree_remove(cmd_tree, cmd);
  287. clish_command_delete(cmd);
  288. continue;
  289. }
  290. }
  291. if (cmd_is_alias) /* Don't duplicate paramv processing for aliases */
  292. continue;
  293. /* Iterate PARAMeters */
  294. paramv = clish_command__get_paramv(cmd);
  295. if (iterate_paramv(this, paramv, access_fn) < 0)
  296. return -1;
  297. /* Resolve PTYPE for args */
  298. if ((args = clish_command__get_args(cmd))) {
  299. if (!resolve_ptype(this, args))
  300. return -1;
  301. }
  302. }
  303. }
  304. return 0;
  305. }
  306. CLISH_SET_STR(shell, default_shebang);
  307. CLISH_GET_STR(shell, default_shebang);