1 All the lines in this file not in between --something BEGINS-- and --something ENDS-- 2 is ignored completely and will not make it into the generated C file 3 4 This file has sections of C code each section delimited by --secname BEGINS-- 5 and --secname ENDS--. In the generated C code certain section may be used multiple 6 times. Currently the different section which must be defined are 7 8 header, system, item, login and footer 9 10 Any additional sections you define will be processed but will probably not make it 11 to the C code if you do not modify menugen.py to use it. 12 13 header and footer go through unmolested. The remaining are % substituted using 14 python rules. Basically it means %(var)s gets replaced by the value of the variable 15 "var" which is a processed form of what is read from the .menu file 16 17 NOTE: There is absolutely no C code in the python script, so you are free to 18 modify this template to suit your needs 19 20 --header BEGINS-- 21 /* -*- c -*- ------------------------------------------------------------- * 22 * 23 * Copyright 2004-2006 Murali Krishnan Ganapathy - All Rights Reserved 24 * 25 * This program is free software; you can redistribute it and/or modify 26 * it under the terms of the GNU General Public License as published by 27 * the Free Software Foundation, Inc., 53 Temple Place Ste 330, 28 * Boston MA 02111-1307, USA; either version 2 of the License, or 29 * (at your option) any later version; incorporated herein by reference. 30 * 31 * ----------------------------------------------------------------------- */ 32 33 #ifndef NULL 34 #define NULL ((void *) 0) 35 #endif 36 37 #include "cmenu.h" 38 #include "help.h" 39 #include "passwords.h" 40 #include "com32io.h" 41 #include <string.h> 42 #include <stdlib.h> 43 #include <unistd.h> 44 45 #define MAX_CMD_LINE_LENGTH 514 46 47 typedef struct s_xtra { 48 long ipappend; // Stores the ipappend flag to send (useful for PXELINUX only) 49 char *argsmenu; // Stores the name of menu which contains options for the given RUN item 50 char *perms; // stores the permissions required to activate the item 51 } t_xtra; 52 53 typedef t_xtra *pt_xtra; // Pointer to extra datastructure 54 55 // Types of dot commands for which caller takes responsibility of handling 56 // In some case some commands may not make sense, it is up to the caller 57 // to handle cases which do not make sense 58 typedef enum {QUIT_CMD, REPEAT_CMD, ENTER_CMD, ESCAPE_CMD} t_dotcmd; 59 60 61 /*----------------- Global Variables */ 62 63 // default user 64 #define GUEST_USER "guest" 65 66 // for local commands. return value of execdotcmd 67 #define QUIT_CMD 0 68 #define RPT_CMD 1 69 70 char username[12]; // Name of user currently using the system 71 72 int PWD_ROW; // Line number where user authentication happens 73 int EDIT_ROW; // row where User Tab 74 75 char loginstr[] = "<L>ogin "; 76 char logoutstr[30]; 77 78 int vmode; // The video mode we want to be in 79 char timeoutcmd[MAX_CMD_LINE_LENGTH]; // Command to execute on timeout 80 char totaltimeoutcmd[MAX_CMD_LINE_LENGTH]; // Command to execute on totaltimeout 81 82 char QUITSTR[] = ".quit"; // same as exit 83 char IGNORESTR[]=".ignore"; // same as repeat, wait 84 85 /*---------------- End globals */ 86 87 // returns pointer to first non-space char 88 // and advances end of str by removing trailing spaces 89 char * strip(char *str) 90 { 91 char *p,*s,*e; 92 if (!str) return NULL; 93 p = str; 94 s = NULL; 95 e = NULL; 96 while (*p) { 97 if (*p != ' ') { 98 // mark start of string or record the last visited non-space char 99 if (!s) s=p; else e=p; 100 } 101 p++; 102 } 103 *(++e)='\0'; // kill string earlier 104 return s; 105 } 106 107 // executes a list of % separated commands 108 // non-dot commands are assumed to be syslinux commands 109 // All syslinux commands are appended with the contents of kerargs 110 // If it fails (kernel not found) then the next one is tried in the 111 // list 112 // returns QUIT_CMD or RPT_CMD 113 t_dotcmd execdotcmd(const char *cmd, char *defcmd, const char *kerargs) 114 { 115 char cmdline[MAX_CMD_LINE_LENGTH]; 116 char dotcmd[MAX_CMD_LINE_LENGTH]; 117 char *curr,*next,*p,*args; 118 char ctr; 119 120 strcpy(dotcmd,cmd); 121 next = dotcmd; 122 cmdline[0] = '\0'; 123 while (*next) { // if something to do 124 curr = next; 125 p = strchr(next,'%'); 126 if (p) { 127 *p--='\0'; next=p+2; 128 while (*p == ' ') p--; 129 *(++p)='\0'; // remove trailing spaces 130 } else { 131 if (*defcmd) { // execute defcmd next 132 next=defcmd; 133 defcmd=NULL; // exec def cmd only once 134 } else next=NULL; 135 } 136 // now we just need to execute the command "curr" 137 curr = strip(curr); 138 if (curr[0] != '.') { // just run the kernel 139 strcpy(cmdline,curr); 140 if (kerargs) strcat(cmdline,kerargs); 141 runsyslinuximage(cmdline,0); // No IPAppend 142 } else { // We have a DOT command 143 // split command into command and args (may be empty) 144 args = curr; 145 while ( (*args != ' ') && (*args != '\0') ) args++; 146 if (*args) { // found a space 147 *args++ = '\0'; 148 while (*args == ' ') args++; // skip over spaces 149 } 150 if ( (strcmp(curr,".exit")==0) || 151 (strcmp(curr,".quit")==0) 152 ) 153 return QUIT_CMD; 154 if ( (strcmp(curr,".repeat")==0) || 155 (strcmp(curr,".ignore")==0) || 156 (strcmp(curr,".wait")==0) 157 ) 158 return RPT_CMD; 159 if (strcmp(curr,".beep")==0) { 160 if ((args) && ('0' <= args[0]) && (args[0] <= '9')) 161 ctr = args[0]-'0'; 162 else ctr=1; 163 for (;ctr>0; ctr--) beep(); 164 } 165 if (strcmp(curr,".help")==0) runhelp(args); 166 } 167 } 168 return RPT_CMD; // by default we do not quit 169 } 170 171 172 TIMEOUTCODE timeout(const char *cmd) 173 { 174 t_dotcmd c; 175 c = execdotcmd(cmd,".wait",NULL); 176 switch(c) { 177 case ENTER_CMD: 178 return CODE_ENTER; 179 case ESCAPE_CMD: 180 return CODE_ESCAPE; 181 default: 182 return CODE_WAIT; 183 } 184 } 185 186 TIMEOUTCODE ontimeout(void) 187 { 188 return timeout(timeoutcmd); 189 } 190 191 TIMEOUTCODE ontotaltimeout(void) 192 { 193 return timeout(totaltimeoutcmd); 194 } 195 196 void keys_handler(t_menusystem * ms __attribute__ (( unused )), t_menuitem * mi, int scancode) 197 { 198 int nc, nr; 199 200 if (getscreensize(1, &nr, &nc)) { 201 /* Unknown screen size? */ 202 nc = 80; 203 nr = 24; 204 } 205 206 if ( (scancode == KEY_F1) && (mi->helpid != 0xFFFF) ) { // If scancode of F1 and non-trivial helpid 207 runhelpsystem(mi->helpid); 208 } 209 210 // If user hit TAB, and item is an "executable" item 211 // and user has privileges to edit it, edit it in place. 212 if ((scancode == KEY_TAB) && (mi->action == OPT_RUN) && 213 (EDIT_ROW < nr) && (EDIT_ROW > 0) && 214 (isallowed(username,"editcmd") || isallowed(username,"root"))) { 215 // User typed TAB and has permissions to edit command line 216 gotoxy(EDIT_ROW,1); 217 csprint("Command line:",0x07); 218 editstring(mi->data,ACTIONLEN); 219 gotoxy(EDIT_ROW,1); 220 cprint(' ',0x07,nc-1); 221 } 222 } 223 224 t_handler_return login_handler(t_menusystem *ms, t_menuitem *mi) 225 { 226 (void)mi; // Unused 227 char pwd[40]; 228 char login[40]; 229 int nc, nr; 230 t_handler_return rv; 231 232 (void)ms; 233 234 rv = ACTION_INVALID; 235 if (PWD_ROW < 0) return rv; // No need to authenticate 236 237 if (mi->item == loginstr) { /* User wants to login */ 238 if (getscreensize(1, &nr, &nc)) { 239 /* Unknown screen size? */ 240 nc = 80; 241 nr = 24; 242 } 243 244 gotoxy(PWD_ROW,1); 245 csprint("Enter Username: ",0x07); 246 getstring(login, sizeof username); 247 gotoxy(PWD_ROW,1); 248 cprint(' ',0x07,nc); 249 csprint("Enter Password: ",0x07); 250 getpwd(pwd, sizeof pwd); 251 gotoxy(PWD_ROW,1); 252 cprint(' ',0x07,nc); 253 254 if (authenticate_user(login,pwd)) 255 { 256 strcpy(username,login); 257 strcpy(logoutstr,"<L>ogout "); 258 strcat(logoutstr,username); 259 mi->item = logoutstr; // Change item to read "Logout" 260 rv.refresh = 1; // refresh the screen (as item contents changed) 261 } 262 else strcpy(username,GUEST_USER); 263 } 264 else // User needs to logout 265 { 266 strcpy(username,GUEST_USER); 267 strcpy(logoutstr,""); 268 mi->item = loginstr; 269 } 270 271 return rv; 272 } 273 274 t_handler_return check_perms(t_menusystem *ms, t_menuitem *mi) 275 { 276 char *perms; 277 pt_xtra x; 278 279 (void) ms; // To keep compiler happy 280 281 x = (pt_xtra) mi->extra_data; 282 perms = ( x ? x->perms : NULL); 283 if (!perms) return ACTION_VALID; 284 285 if (isallowed(username,"root") || isallowed(username,perms)) // If allowed 286 return ACTION_VALID; 287 else return ACTION_INVALID; 288 } 289 290 // Compute the full command line to add and if non-trivial 291 // prepend the string prepend to final command line 292 // Assume cmdline points to buffer long enough to hold answer 293 void gencommand(pt_menuitem mi, char *cmdline) 294 { 295 pt_xtra x; 296 cmdline[0] = '\0'; 297 strcat(cmdline,mi->data); 298 x = (pt_xtra) mi->extra_data; 299 if ( (x) && (x->argsmenu)) gen_append_line(x->argsmenu,cmdline); 300 } 301 302 303 // run the given command together with additional options which may need passing 304 void runcommand(pt_menuitem mi) 305 { 306 char *line; 307 pt_xtra x; 308 long ipappend; 309 310 line = (char *)malloc(sizeof(char)*MAX_CMD_LINE_LENGTH); 311 gencommand(mi,line); 312 x = (pt_xtra) mi->extra_data; 313 ipappend = (x ? x->ipappend : 0); 314 315 runsyslinuximage(line,ipappend); 316 free(line); 317 } 318 319 // set the extra info for the specified menu item. 320 void set_xtra(pt_menuitem mi, const char *argsmenu, const char *perms, unsigned int helpid, long ipappend) 321 { 322 pt_xtra xtra; 323 int bad_argsmenu, bad_perms, bad_ipappend; 324 325 mi->extra_data = NULL; // initalize 326 mi->helpid = helpid; // set help id 327 328 if (mi->action != OPT_RUN) return; 329 330 bad_argsmenu = bad_perms = bad_ipappend = 0; 331 if ( (argsmenu==NULL) || (strlen(argsmenu)==0)) bad_argsmenu = 1; 332 if ( (perms==NULL) || (strlen(perms)==0)) bad_perms = 1; 333 if ( ipappend==0) bad_ipappend = 1; 334 335 if (bad_argsmenu && bad_perms && bad_ipappend) return; 336 337 xtra = (pt_xtra) malloc(sizeof(t_xtra)); 338 mi->extra_data = (void *) xtra; 339 xtra->argsmenu = xtra->perms = NULL; 340 xtra->ipappend = ipappend; 341 if (!bad_argsmenu) { 342 xtra->argsmenu = (char *) malloc(sizeof(char)*(strlen(argsmenu)+1)); 343 strcpy(xtra->argsmenu,argsmenu); 344 } 345 if (!bad_perms) { 346 xtra->perms = (char *) malloc(sizeof(char)*(strlen(perms)+1)); 347 strcpy(xtra->perms,perms); 348 mi->handler = &check_perms; 349 } 350 } 351 352 int main(void) 353 { 354 pt_menuitem curr; 355 char quit; 356 char exitcmd[MAX_CMD_LINE_LENGTH]; 357 char exitcmdroot[MAX_CMD_LINE_LENGTH]; 358 char onerrcmd[MAX_CMD_LINE_LENGTH]; 359 char startfile[MAX_CMD_LINE_LENGTH]; 360 char *ecmd; // effective exit command or onerrorcmd 361 char skipbits; 362 char skipcmd[MAX_CMD_LINE_LENGTH]; 363 int timeout; // time in multiples of 0.1 seconds 364 int totaltimeout; // time in multiples of 0.1 seconds 365 t_dotcmd dotrv; // to store the return value of execdotcmd 366 int temp; 367 368 strcpy(username,GUEST_USER); 369 --header ENDS-- 370 --system BEGINS-- 371 /* ---- Initializing menu system parameters --- */ 372 vmode = %(videomode)s; 373 skipbits = %(skipcondn)s; 374 PWD_ROW = %(pwdrow)s; 375 EDIT_ROW = %(editrow)s; 376 strcpy(onerrcmd,"%(onerrorcmd)s"); 377 strcpy(exitcmd,"%(exitcmd)s"); 378 strcpy(exitcmdroot,"%(exitcmdroot)s"); 379 // If not specified exitcmdroot = exitcmd 380 if (exitcmdroot[0] == '\0') strcpy(exitcmdroot,exitcmd); 381 // Timeout stuff 382 timeout = %(timeout)s; 383 strcpy(timeoutcmd,"%(timeoutcmd)s"); 384 totaltimeout = %(totaltimeout)s; 385 strcpy(totaltimeoutcmd,"%(totaltimeoutcmd)s"); 386 strcpy(startfile,"%(startfile)s"); 387 388 init_help("%(helpdir)s"); 389 init_passwords("%(pwdfile)s"); 390 init_menusystem("%(title)s"); 391 set_window_size(%(top)s,%(left)s,%(bot)s,%(right)s); 392 393 // Register the ontimeout handler, with a time out of 10 seconds 394 reg_ontimeout(ontimeout,timeout*10,0); 395 reg_ontotaltimeout(ontotaltimeout,totaltimeout*10); 396 397 // Register menusystem handlers 398 reg_handler(HDLR_KEYS,&keys_handler); 399 /* ---- End of initialization --- */ 400 --system ENDS-- 401 --item BEGINS-- 402 403 curr = add_item("%(item)s","%(info)s",%(type)s,"%(data)s",%(state)d); 404 set_xtra(curr,"%(argsmenu)s","%(perms)s",%(helpid)d,%(ipappend)d); // Set associated extra info 405 set_shortcut(%(shortcut)s); 406 --item ENDS-- 407 --login BEGINS-- 408 409 curr = add_item(loginstr,"Login/Logout of authentication system",OPT_RUN,NULL,0); 410 curr->helpid = %(helpid)d; 411 curr->handler = &login_handler; 412 --login ENDS-- 413 --menu BEGINS-- 414 415 /* ------- MENU %(name)s ----- */ 416 add_named_menu("%(name)s","%(title)s",-1); 417 --menu ENDS-- 418 --footer BEGINS-- 419 /* ------- END OF MENU declarations ----- */ 420 421 // Check if we should skip the menu altogether 422 quit = 0; // Dont skip the menu 423 if (getshiftflags() & skipbits) { // we must skip the menu altogther and execute skipcmd 424 dotrv = execdotcmd(skipcmd,".beep%.exit",NULL); // Worst case we beep and exit 425 if (dotrv == QUIT_CMD) quit = 1; 426 } 427 428 // Switch vide mode if required 429 if (vmode != 0xFF) setvideomode(vmode); 430 431 // Do we have a startfile to display? 432 if (startfile[0] != '\0') runhelp(startfile); 433 434 // The main loop 435 while (quit == 0) { // As long as quit is zero repeat 436 curr = showmenus(find_menu_num("main")); // Initial menu is the one called "main" 437 438 if (curr) { 439 if (curr->action == OPT_RUN) { 440 ecmd = (char *)malloc(sizeof(char)*MAX_CMD_LINE_LENGTH); 441 gencommand(curr,ecmd); 442 temp = (curr->extra_data ? ((pt_xtra)curr->extra_data)->ipappend : 0); 443 runsyslinuximage(ecmd,temp); 444 // kernel not found so execute the appropriate dot command 445 dotrv = execdotcmd(onerrcmd,".quit",ecmd); // pass bad cmdline as arg 446 if (dotrv== QUIT_CMD) quit = 1; 447 free(ecmd); ecmd = NULL; 448 } 449 else csprint("Error in programming!",0x07); 450 } else { 451 // find effective exit command 452 ecmd = ( isallowed(username,"root") ? exitcmdroot : exitcmd); 453 dotrv = execdotcmd(ecmd,".repeat",NULL); 454 quit = (dotrv == QUIT_CMD ? 1 : 0); // should we exit now 455 } 456 } 457 458 // Deallocate space used and quit 459 close_passwords(); 460 close_help(); 461 close_menusystem(); 462 return 0; 463 } 464 465 --footer ENDS-- 466
