common/main.c

   1 /*-
   2  * Copyright (c) 1992, 1993, 1994
   3  *      The Regents of the University of California.  All rights reserved.
   4  * Copyright (c) 1992, 1993, 1994, 1995, 1996
   5  *      Keith Bostic.  All rights reserved.
   6  *
   7  * See the LICENSE file for redistribution information.
   8  */
   9
  10 #include "config.h"
  11
  12 #ifndef lint
  13 static const char copyright[] =
  14 "%Z% Copyright (c) 1992, 1993, 1994\n\
  15         The Regents of the University of California.  All rights reserved.\n\
  16 %Z% Copyright (c) 1992, 1993, 1994, 1995, 1996\n\
  17         Keith Bostic.  All rights reserved.\n";
  18 #endif /* not lint */
  19
  20 #ifndef lint
  21 static const char sccsid[] = "$Id: main.c,v 10.59 2000/07/21 22:09:28 skimo Exp $ (Berkeley) $Date: 2000/07/21 22:09:28 $";
  22 #endif /* not lint */
  23
  24 #include <sys/types.h>
  25 #include <sys/queue.h>
  26 #include <sys/stat.h>
  27 #include <sys/time.h>
  28
  29 #include <bitstring.h>
  30 #include <errno.h>
  31 #include <fcntl.h>
  32 #include <limits.h>
  33 #include <stdio.h>
  34 #include <stdlib.h>
  35 #include <string.h>
  36 #include <unistd.h>
  37
  38 #include "common.h"
  39 #include "../vi/vi.h"
  40 #include "pathnames.h"
  41
  42 static void      attach __P((GS *));
  43 static void      v_estr __P((char *, int, char *));
  44 static int       v_obsolete __P((char *, char *[]));
  45
  46 /*
  47  * editor --
  48  *      Main editor routine.
  49  *
  50  * PUBLIC: int editor __P((WIN *, int, char *[]));
  51  */
  52 int
  53 editor(wp, argc, argv)
  54         WIN *wp;
  55         int argc;
  56         char *argv[];
  57 {
  58         extern int optind;
  59         extern char *optarg;
  60         const char *p;
  61         EVENT ev;
  62         FREF *frp;
  63         SCR *sp;
  64         GS *gp;
  65         size_t len;
  66         u_int flags;
  67         int ch, flagchk, lflag, secure, startup, readonly, rval, silent;
  68         char *tag_f, *wsizearg, path[256];
  69         CHAR_T *w;
  70         size_t wlen;
  71
  72         gp = wp->gp;
  73
  74         /* Initialize the busy routine, if not defined by the screen. */
  75         if (gp->scr_busy == NULL)
  76                 gp->scr_busy = vs_busy;
  77         /* Initialize the message routine, if not defined by the screen. */
  78         if (gp->scr_msg == NULL)
  79                 gp->scr_msg = vs_msg;
  80
  81         /* Set initial screen type and mode based on the program name. */
  82         readonly = 0;
  83         if (!strcmp(gp->progname, "ex") || !strcmp(gp->progname, "nex"))
  84                 LF_INIT(SC_EX);
  85         else {
  86                 /* Nview, view are readonly. */
  87                 if (!strcmp(gp->progname, "nview") ||
  88                     !strcmp(gp->progname, "view"))
  89                         readonly = 1;
  90
  91                 /* Vi is the default. */
  92                 LF_INIT(SC_VI);
  93         }
  94
  95         /* Convert old-style arguments into new-style ones. */
  96         if (v_obsolete(gp->progname, argv))
  97                 return (1);
  98
  99         /* Parse the arguments. */
 100         flagchk = '\0';
 101         tag_f = wsizearg = NULL;
 102         lflag = secure = silent = 0;
 103         startup = 1;
 104
 105         /* Set the file snapshot flag. */
 106         F_SET(gp, G_SNAPSHOT);
 107
 108 #ifdef DEBUG
 109         while ((ch = getopt(argc, argv, "c:D:eFlRrSsT:t:vw:")) != EOF)
 110 #else
 111         while ((ch = getopt(argc, argv, "c:eFlRrSst:vw:")) != EOF)
 112 #endif
 113                 switch (ch) {
 114                 case 'c':               /* Run the command. */
 115                         /*
 116                          * XXX
 117                          * We should support multiple -c options.
 118                          */
 119                         if (gp->c_option != NULL) {
 120                                 v_estr(gp->progname, 0,
 121                                     "only one -c command may be specified.");
 122                                 return (1);
 123                         }
 124                         gp->c_option = optarg;
 125                         break;
 126 #ifdef DEBUG
 127                 case 'D':
 128                         switch (optarg[0]) {
 129                         case 's':
 130                                 startup = 0;
 131                                 break;
 132                         case 'w':
 133                                 attach(gp);
 134                                 break;
 135                         default:
 136                                 v_estr(gp->progname, 0,
 137                                     "usage: -D requires s or w argument.");
 138                                 return (1);
 139                         }
 140                         break;
 141 #endif
 142                 case 'e':               /* Ex mode. */
 143                         LF_CLR(SC_VI);
 144                         LF_SET(SC_EX);
 145                         break;
 146                 case 'F':               /* No snapshot. */
 147                         F_CLR(gp, G_SNAPSHOT);
 148                         break;
 149                 case 'l':               /* Set lisp, showmatch options. */
 150                         lflag = 1;
 151                         break;
 152                 case 'R':               /* Readonly. */
 153                         readonly = 1;
 154                         break;
 155                 case 'r':               /* Recover. */
 156                         if (flagchk == 't') {
 157                                 v_estr(gp->progname, 0,
 158                                     "only one of -r and -t may be specified.");
 159                                 return (1);
 160                         }
 161                         flagchk = 'r';
 162                         break;
 163                 case 'S':
 164                         secure = 1;
 165                         break;
 166                 case 's':
 167                         silent = 1;
 168                         break;
 169 #ifdef TRACE
 170                 case 'T':               /* Trace. */
 171                         (void)vtrace_init(optarg);
 172                         break;
 173 #endif
 174                 case 't':               /* Tag. */
 175                         if (flagchk == 'r') {
 176                                 v_estr(gp->progname, 0,
 177                                     "only one of -r and -t may be specified.");
 178                                 return (1);
 179                         }
 180                         if (flagchk == 't') {
 181                                 v_estr(gp->progname, 0,
 182                                     "only one tag file may be specified.");
 183                                 return (1);
 184                         }
 185                         flagchk = 't';
 186                         tag_f = optarg;
 187                         break;
 188                 case 'v':               /* Vi mode. */
 189                         LF_CLR(SC_EX);
 190                         LF_SET(SC_VI);
 191                         break;
 192                 case 'w':
 193                         wsizearg = optarg;
 194                         break;
 195                 case '?':
 196                 default:
 197                         (void)gp->scr_usage();
 198                         return (1);
 199                 }
 200         argc -= optind;
 201         argv += optind;
 202
 203         /*
 204          * -s option is only meaningful to ex.
 205          *
 206          * If not reading from a terminal, it's like -s was specified.
 207          */
 208         if (silent && !LF_ISSET(SC_EX)) {
 209                 v_estr(gp->progname, 0, "-s option is only applicable to ex.");
 210                 goto err;
 211         }
 212         if (LF_ISSET(SC_EX) && F_ISSET(gp, G_SCRIPTED))
 213                 silent = 1;
 214
 215         /*
 216         if (db_env_create(&gp->env, 0)) {
 217                 v_estr(gp->progname, 0, "Unable to create DB environment.");
 218                 goto err;
 219         }
 220         gp->env->set_errfile(gp->env, stderr);
 221         gp->env->open(gp->env, NULL, DB_CREATE | DB_INIT_MPOOL, 0);
 222         */
 223         gp->env = 0;
 224
 225         /*
 226          * Build and initialize the first/current screen.  This is a bit
 227          * tricky.  If an error is returned, we may or may not have a
 228          * screen structure.  If we have a screen structure, put it on a
 229          * display queue so that the error messages get displayed.
 230          *
 231          * !!!
 232          * Everything we do until we go interactive is done in ex mode.
 233          */
 234         if (screen_init(gp, NULL, &sp)) {
 235                 if (sp != NULL) {
 236                         CIRCLEQ_INSERT_HEAD(&wp->scrq, sp, q);
 237                         sp->wp = wp;
 238                 }
 239                 goto err;
 240         }
 241         F_SET(sp, SC_EX);
 242         CIRCLEQ_INSERT_HEAD(&wp->scrq, sp, q);
 243         sp->wp = wp;
 244
 245         if (v_key_init(sp))             /* Special key initialization. */
 246                 goto err;
 247
 248         { int oargs[5], *oargp = oargs;
 249         if (lflag) {                    /* Command-line options. */
 250                 *oargp++ = O_LISP;
 251                 *oargp++ = O_SHOWMATCH;
 252         }
 253         if (readonly)
 254                 *oargp++ = O_READONLY;
 255         if (secure)
 256                 *oargp++ = O_SECURE;
 257         *oargp = -1;                    /* Options initialization. */
 258         if (opts_init(sp, oargs))
 259                 goto err;
 260         }
 261         if (wsizearg != NULL) {
 262                 ARGS *av[2], a, b;
 263                 (void)snprintf(path, sizeof(path), "window=%s", wsizearg);
 264                 a.bp = (CHAR_T *)path;
 265                 a.len = strlen(path);
 266                 b.bp = NULL;
 267                 b.len = 0;
 268                 av[0] = &a;
 269                 av[1] = &b;
 270                 (void)opts_set(sp, av, NULL);
 271         }
 272         if (silent) {                   /* Ex batch mode option values. */
 273                 O_CLR(sp, O_AUTOPRINT);
 274                 O_CLR(sp, O_PROMPT);
 275                 O_CLR(sp, O_VERBOSE);
 276                 O_CLR(sp, O_WARN);
 277                 F_SET(sp, SC_EX_SILENT);
 278         }
 279
 280         sp->rows = O_VAL(sp, O_LINES);  /* Make ex formatting work. */
 281         sp->cols = O_VAL(sp, O_COLUMNS);
 282
 283         if (!silent && startup) {       /* Read EXINIT, exrc files. */
 284                 if (ex_exrc(sp))
 285                         goto err;
 286                 if (F_ISSET(sp, SC_EXIT | SC_EXIT_FORCE)) {
 287                         if (screen_end(sp))
 288                                 goto err;
 289                         goto done;
 290                 }
 291         }
 292
 293         /*
 294          * List recovery files if -r specified without file arguments.
 295          * Note, options must be initialized and startup information
 296          * read before doing this.
 297          */
 298         if (flagchk == 'r' && argv[0] == NULL) {
 299                 if (rcv_list(sp))
 300                         goto err;
 301                 if (screen_end(sp))
 302                         goto err;
 303                 goto done;
 304         }
 305
 306         /*
 307          * !!!
 308          * Initialize the default ^D, ^U scrolling value here, after the
 309          * user has had every opportunity to set the window option.
 310          *
 311          * It's historic practice that changing the value of the window
 312          * option did not alter the default scrolling value, only giving
 313          * a count to ^D/^U did that.
 314          */
 315         sp->defscroll = (O_VAL(sp, O_WINDOW) + 1) / 2;
 316
 317         /*
 318          * If we don't have a command-line option, switch into the right
 319          * editor now, so that we position default files correctly, and
 320          * so that any tags file file-already-locked messages are in the
 321          * vi screen, not the ex screen.
 322          *
 323          * XXX
 324          * If we have a command-line option, the error message can end
 325          * up in the wrong place, but I think that the combination is
 326          * unlikely.
 327          */
 328         if (gp->c_option == NULL) {
 329                 F_CLR(sp, SC_EX | SC_VI);
 330                 F_SET(sp, LF_ISSET(SC_EX | SC_VI));
 331         }
 332
 333         /* Open a tag file if specified. */
 334         if (tag_f != NULL) {
 335                 CHAR2INT(sp, tag_f, strlen(tag_f) + 1, w, wlen);
 336                 if (ex_tag_first(sp, w))
 337                         goto err;
 338         }
 339
 340         /*
 341          * Append any remaining arguments as file names.  Files are recovery
 342          * files if -r specified.  If the tag option or ex startup commands
 343          * loaded a file, then any file arguments are going to come after it.
 344          */
 345         if (*argv != NULL) {
 346                 if (sp->frp != NULL) {
 347                         /* Cheat -- we know we have an extra argv slot. */
 348                         MALLOC_NOMSG(sp,
 349                             *--argv, char *, strlen(sp->frp->name) + 1);
 350                         if (*argv == NULL) {
 351                                 v_estr(gp->progname, errno, NULL);
 352                                 goto err;
 353                         }
 354                         (void)strcpy(*argv, sp->frp->name);
 355                 }
 356                 sp->argv = sp->cargv = argv;
 357                 F_SET(sp, SC_ARGNOFREE);
 358                 if (flagchk == 'r')
 359                         F_SET(sp, SC_ARGRECOVER);
 360         }
 361
 362         /*
 363          * If the ex startup commands and or/the tag option haven't already
 364          * created a file, create one.  If no command-line files were given,
 365          * use a temporary file.
 366          */
 367         if (sp->frp == NULL) {
 368                 if (sp->argv == NULL) {
 369                         if ((frp = file_add(sp, NULL)) == NULL)
 370                                 goto err;
 371                 } else  {
 372                         if ((frp = file_add(sp, sp->argv[0])) == NULL)
 373                                 goto err;
 374                         if (F_ISSET(sp, SC_ARGRECOVER))
 375                                 F_SET(frp, FR_RECOVER);
 376                 }
 377
 378                 if (file_init(sp, frp, NULL, 0))
 379                         goto err;
 380                 if (EXCMD_RUNNING(wp)) {
 381                         (void)ex_cmd(sp);
 382                         if (F_ISSET(sp, SC_EXIT | SC_EXIT_FORCE)) {
 383                                 if (screen_end(sp))
 384                                         goto err;
 385                                 goto done;
 386                         }
 387                 }
 388         }
 389
 390         /*
 391          * Check to see if we need to wait for ex.  If SC_SCR_EX is set, ex
 392          * was forced to initialize the screen during startup.  We'd like to
 393          * wait for a single character from the user, but we can't because
 394          * we're not in raw mode.  We can't switch to raw mode because the
 395          * vi initialization will switch to xterm's alternate screen, causing
 396          * us to lose the messages we're pausing to make sure the user read.
 397          * So, wait for a complete line.
 398          */
 399         if (F_ISSET(sp, SC_SCR_EX)) {
 400                 p = msg_cmsg(sp, CMSG_CONT_R, &len);
 401                 (void)write(STDOUT_FILENO, p, len);
 402                 for (;;) {
 403                         if (v_event_get(sp, &ev, 0, 0))
 404                                 goto err;
 405                         if (ev.e_event == E_INTERRUPT ||
 406                             ev.e_event == E_CHARACTER &&
 407                             (ev.e_value == K_CR || ev.e_value == K_NL))
 408                                 break;
 409                         (void)gp->scr_bell(sp);
 410                 }
 411         }
 412
 413         /* Switch into the right editor, regardless. */
 414         F_CLR(sp, SC_EX | SC_VI);
 415         F_SET(sp, LF_ISSET(SC_EX | SC_VI) | SC_STATUS_CNT);
 416
 417         /*
 418          * Main edit loop.  Vi handles split screens itself, we only return
 419          * here when switching editor modes or restarting the screen.
 420          */
 421         while (sp != NULL)
 422                 if (F_ISSET(sp, SC_EX) ? ex(&sp) : vi(&sp))
 423                         goto err;
 424
 425 done:   rval = 0;
 426         if (0)
 427 err:            rval = 1;
 428
 429         return (rval);
 430 }
 431
 432 /*
 433  * v_obsolete --
 434  *      Convert historic arguments into something getopt(3) will like.
 435  */
 436 static int
 437 v_obsolete(name, argv)
 438         char *name, *argv[];
 439 {
 440         size_t len;
 441         char *p;
 442
 443         /*
 444          * Translate old style arguments into something getopt will like.
 445          * Make sure it's not text space memory, because ex modifies the
 446          * strings.
 447          *      Change "+" into "-c$".
 448          *      Change "+<anything else>" into "-c<anything else>".
 449          *      Change "-" into "-s"
 450          *      The c, T, t and w options take arguments so they can't be
 451          *          special arguments.
 452          *
 453          * Stop if we find "--" as an argument, the user may want to edit
 454          * a file named "+foo".
 455          */
 456         while (*++argv && strcmp(argv[0], "--"))
 457                 if (argv[0][0] == '+') {
 458                         if (argv[0][1] == '\0') {
 459                                 MALLOC_NOMSG(NULL, argv[0], char *, 4);
 460                                 if (argv[0] == NULL)
 461                                         goto nomem;
 462                                 (void)strcpy(argv[0], "-c$");
 463                         } else  {
 464                                 p = argv[0];
 465                                 len = strlen(argv[0]);
 466                                 MALLOC_NOMSG(NULL, argv[0], char *, len + 2);
 467                                 if (argv[0] == NULL)
 468                                         goto nomem;
 469                                 argv[0][0] = '-';
 470                                 argv[0][1] = 'c';
 471                                 (void)strcpy(argv[0] + 2, p + 1);
 472                         }
 473                 } else if (argv[0][0] == '-')
 474                         if (argv[0][1] == '\0') {
 475                                 MALLOC_NOMSG(NULL, argv[0], char *, 3);
 476                                 if (argv[0] == NULL) {
 477 nomem:                                  v_estr(name, errno, NULL);
 478                                         return (1);
 479                                 }
 480                                 (void)strcpy(argv[0], "-s");
 481                         } else
 482                                 if ((argv[0][1] == 'c' || argv[0][1] == 'T' ||
 483                                     argv[0][1] == 't' || argv[0][1] == 'w') &&
 484                                     argv[0][2] == '\0')
 485                                         ++argv;
 486         return (0);
 487 }
 488
 489 #ifdef DEBUG
 490 static void
 491 attach(gp)
 492         GS *gp;
 493 {
 494         int fd;
 495         char ch;
 496
 497         if ((fd = open(_PATH_TTY, O_RDONLY, 0)) < 0) {
 498                 v_estr(gp->progname, errno, _PATH_TTY);
 499                 return;
 500         }
 501
 502         (void)printf("process %lu waiting, enter <CR> to continue: ",
 503             (u_long)getpid());
 504         (void)fflush(stdout);
 505
 506         do {
 507                 if (read(fd, &ch, 1) != 1) {
 508                         (void)close(fd);
 509                         return;
 510                 }
 511         } while (ch != '\n' && ch != '\r');
 512         (void)close(fd);
 513 }
 514 #endif
 515
 516 static void
 517 v_estr(name, eno, msg)
 518         char *name, *msg;
 519         int eno;
 520 {
 521         (void)fprintf(stderr, "%s", name);
 522         if (msg != NULL)
 523                 (void)fprintf(stderr, ": %s", msg);
 524         if (eno)
 525                 (void)fprintf(stderr, ": %s", strerror(errno));
 526         (void)fprintf(stderr, "\n");
 527 }