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 10.55 2000/07/07 22:29:13 skimo Exp $ (Berkeley) $Date: 2000/07/07 22:29:13 $";
  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
  70         gp = wp->gp;
  71
  72         /* Initialize the busy routine, if not defined by the screen. */
  73         if (gp->scr_busy == NULL)
  74                 gp->scr_busy = vs_busy;
  75         /* Initialize the message routine, if not defined by the screen. */
  76         if (gp->scr_msg == NULL)
  77                 gp->scr_msg = vs_msg;
  78
  79         /* Common global structure initialization. */
  80         CIRCLEQ_INIT(&gp->hq);
  81         gp->noprint = DEFAULT_NOPRINT;
  82
  83         /* Structures shared by screens so stored in the GS structure. */
  84         CIRCLEQ_INIT(&gp->frefq);
  85         CIRCLEQ_INIT(&gp->exfq);
  86         CIRCLEQ_INIT(&gp->dcb_store.textq);
  87         LIST_INIT(&gp->cutq);
  88         LIST_INIT(&gp->seqq);
  89
  90         /* Set initial screen type and mode based on the program name. */
  91         readonly = 0;
  92         if (!strcmp(gp->progname, "ex") || !strcmp(gp->progname, "nex"))
  93                 LF_INIT(SC_EX);
  94         else {
  95                 /* Nview, view are readonly. */
  96                 if (!strcmp(gp->progname, "nview") ||
  97                     !strcmp(gp->progname, "view"))
  98                         readonly = 1;
  99
 100                 /* Vi is the default. */
 101                 LF_INIT(SC_VI);
 102         }
 103
 104         /* Convert old-style arguments into new-style ones. */
 105         if (v_obsolete(gp->progname, argv))
 106                 return (1);
 107
 108         /* Parse the arguments. */
 109         flagchk = '\0';
 110         tag_f = wsizearg = NULL;
 111         lflag = secure = silent = 0;
 112         startup = 1;
 113
 114         /* Set the file snapshot flag. */
 115         F_SET(gp, G_SNAPSHOT);
 116
 117 #ifdef DEBUG
 118         while ((ch = getopt(argc, argv, "c:D:eFlRrSsT:t:vw:")) != EOF)
 119 #else
 120         while ((ch = getopt(argc, argv, "c:eFlRrSst:vw:")) != EOF)
 121 #endif
 122                 switch (ch) {
 123                 case 'c':               /* Run the command. */
 124                         /*
 125                          * XXX
 126                          * We should support multiple -c options.
 127                          */
 128                         if (gp->c_option != NULL) {
 129                                 v_estr(gp->progname, 0,
 130                                     "only one -c command may be specified.");
 131                                 return (1);
 132                         }
 133                         gp->c_option = optarg;
 134                         break;
 135 #ifdef DEBUG
 136                 case 'D':
 137                         switch (optarg[0]) {
 138                         case 's':
 139                                 startup = 0;
 140                                 break;
 141                         case 'w':
 142                                 attach(gp);
 143                                 break;
 144                         default:
 145                                 v_estr(gp->progname, 0,
 146                                     "usage: -D requires s or w argument.");
 147                                 return (1);
 148                         }
 149                         break;
 150 #endif
 151                 case 'e':               /* Ex mode. */
 152                         LF_CLR(SC_VI);
 153                         LF_SET(SC_EX);
 154                         break;
 155                 case 'F':               /* No snapshot. */
 156                         F_CLR(gp, G_SNAPSHOT);
 157                         break;
 158                 case 'l':               /* Set lisp, showmatch options. */
 159                         lflag = 1;
 160                         break;
 161                 case 'R':               /* Readonly. */
 162                         readonly = 1;
 163                         break;
 164                 case 'r':               /* Recover. */
 165                         if (flagchk == 't') {
 166                                 v_estr(gp->progname, 0,
 167                                     "only one of -r and -t may be specified.");
 168                                 return (1);
 169                         }
 170                         flagchk = 'r';
 171                         break;
 172                 case 'S':
 173                         secure = 1;
 174                         break;
 175                 case 's':
 176                         silent = 1;
 177                         break;
 178 #ifdef TRACE
 179                 case 'T':               /* Trace. */
 180                         (void)vtrace_init(optarg);
 181                         break;
 182 #endif
 183                 case 't':               /* Tag. */
 184                         if (flagchk == 'r') {
 185                                 v_estr(gp->progname, 0,
 186                                     "only one of -r and -t may be specified.");
 187                                 return (1);
 188                         }
 189                         if (flagchk == 't') {
 190                                 v_estr(gp->progname, 0,
 191                                     "only one tag file may be specified.");
 192                                 return (1);
 193                         }
 194                         flagchk = 't';
 195                         tag_f = optarg;
 196                         break;
 197                 case 'v':               /* Vi mode. */
 198                         LF_CLR(SC_EX);
 199                         LF_SET(SC_VI);
 200                         break;
 201                 case 'w':
 202                         wsizearg = optarg;
 203                         break;
 204                 case '?':
 205                 default:
 206                         (void)gp->scr_usage();
 207                         return (1);
 208                 }
 209         argc -= optind;
 210         argv += optind;
 211
 212         /*
 213          * -s option is only meaningful to ex.
 214          *
 215          * If not reading from a terminal, it's like -s was specified.
 216          */
 217         if (silent && !LF_ISSET(SC_EX)) {
 218                 v_estr(gp->progname, 0, "-s option is only applicable to ex.");
 219                 goto err;
 220         }
 221         if (LF_ISSET(SC_EX) && F_ISSET(gp, G_SCRIPTED))
 222                 silent = 1;
 223
 224         if (db_env_create(&gp->env, 0)) {
 225                 v_estr(gp->progname, 0, "Unable to create DB environment.");
 226                 goto err;
 227         }
 228         gp->env->set_errfile(gp->env, stderr);
 229         gp->env->open(gp->env, NULL, 0, 0);
 230         gp->env = NULL;
 231
 232         /*
 233          * Build and initialize the first/current screen.  This is a bit
 234          * tricky.  If an error is returned, we may or may not have a
 235          * screen structure.  If we have a screen structure, put it on a
 236          * display queue so that the error messages get displayed.
 237          *
 238          * !!!
 239          * Everything we do until we go interactive is done in ex mode.
 240          */
 241         if (screen_init(gp, NULL, &sp)) {
 242                 if (sp != NULL) {
 243                         CIRCLEQ_INSERT_HEAD(&wp->scrq, sp, q);
 244                         sp->wp = wp;
 245                 }
 246                 goto err;
 247         }
 248         F_SET(sp, SC_EX);
 249         CIRCLEQ_INSERT_HEAD(&wp->scrq, sp, q);
 250         sp->wp = wp;
 251
 252         if (v_key_init(sp))             /* Special key initialization. */
 253                 goto err;
 254
 255         { int oargs[5], *oargp = oargs;
 256         if (lflag) {                    /* Command-line options. */
 257                 *oargp++ = O_LISP;
 258                 *oargp++ = O_SHOWMATCH;
 259         }
 260         if (readonly)
 261                 *oargp++ = O_READONLY;
 262         if (secure)
 263                 *oargp++ = O_SECURE;
 264         *oargp = -1;                    /* Options initialization. */
 265         if (opts_init(sp, oargs))
 266                 goto err;
 267         }
 268         if (wsizearg != NULL) {
 269                 ARGS *av[2], a, b;
 270                 (void)snprintf(path, sizeof(path), "window=%s", wsizearg);
 271                 a.bp = (CHAR_T *)path;
 272                 a.len = strlen(path);
 273                 b.bp = NULL;
 274                 b.len = 0;
 275                 av[0] = &a;
 276                 av[1] = &b;
 277                 (void)opts_set(sp, av, NULL);
 278         }
 279         if (silent) {                   /* Ex batch mode option values. */
 280                 O_CLR(sp, O_AUTOPRINT);
 281                 O_CLR(sp, O_PROMPT);
 282                 O_CLR(sp, O_VERBOSE);
 283                 O_CLR(sp, O_WARN);
 284                 F_SET(sp, SC_EX_SILENT);
 285         }
 286
 287         sp->rows = O_VAL(sp, O_LINES);  /* Make ex formatting work. */
 288         sp->cols = O_VAL(sp, O_COLUMNS);
 289
 290         if (!silent && startup) {       /* Read EXINIT, exrc files. */
 291                 if (ex_exrc(sp))
 292                         goto err;
 293                 if (F_ISSET(sp, SC_EXIT | SC_EXIT_FORCE)) {
 294                         if (screen_end(sp))
 295                                 goto err;
 296                         goto done;
 297                 }
 298         }
 299
 300         /*
 301          * List recovery files if -r specified without file arguments.
 302          * Note, options must be initialized and startup information
 303          * read before doing this.
 304          */
 305         if (flagchk == 'r' && argv[0] == NULL) {
 306                 if (rcv_list(sp))
 307                         goto err;
 308                 if (screen_end(sp))
 309                         goto err;
 310                 goto done;
 311         }
 312
 313         /*
 314          * !!!
 315          * Initialize the default ^D, ^U scrolling value here, after the
 316          * user has had every opportunity to set the window option.
 317          *
 318          * It's historic practice that changing the value of the window
 319          * option did not alter the default scrolling value, only giving
 320          * a count to ^D/^U did that.
 321          */
 322         sp->defscroll = (O_VAL(sp, O_WINDOW) + 1) / 2;
 323
 324         /*
 325          * If we don't have a command-line option, switch into the right
 326          * editor now, so that we position default files correctly, and
 327          * so that any tags file file-already-locked messages are in the
 328          * vi screen, not the ex screen.
 329          *
 330          * XXX
 331          * If we have a command-line option, the error message can end
 332          * up in the wrong place, but I think that the combination is
 333          * unlikely.
 334          */
 335         if (gp->c_option == NULL) {
 336                 F_CLR(sp, SC_EX | SC_VI);
 337                 F_SET(sp, LF_ISSET(SC_EX | SC_VI));
 338         }
 339
 340         /* Open a tag file if specified. */
 341         if (tag_f != NULL && ex_tag_first(sp, tag_f))
 342                 goto err;
 343
 344         /*
 345          * Append any remaining arguments as file names.  Files are recovery
 346          * files if -r specified.  If the tag option or ex startup commands
 347          * loaded a file, then any file arguments are going to come after it.
 348          */
 349         if (*argv != NULL) {
 350                 if (sp->frp != NULL) {
 351                         /* Cheat -- we know we have an extra argv slot. */
 352                         MALLOC_NOMSG(sp,
 353                             *--argv, char *, strlen(sp->frp->name) + 1);
 354                         if (*argv == NULL) {
 355                                 v_estr(gp->progname, errno, NULL);
 356                                 goto err;
 357                         }
 358                         (void)strcpy(*argv, sp->frp->name);
 359                 }
 360                 sp->argv = sp->cargv = argv;
 361                 F_SET(sp, SC_ARGNOFREE);
 362                 if (flagchk == 'r')
 363                         F_SET(sp, SC_ARGRECOVER);
 364         }
 365
 366         /*
 367          * If the ex startup commands and or/the tag option haven't already
 368          * created a file, create one.  If no command-line files were given,
 369          * use a temporary file.
 370          */
 371         if (sp->frp == NULL) {
 372                 if (sp->argv == NULL) {
 373                         if ((frp = file_add(sp, NULL)) == NULL)
 374                                 goto err;
 375                 } else  {
 376                         if ((frp = file_add(sp, (CHAR_T *)sp->argv[0])) == NULL)
 377                                 goto err;
 378                         if (F_ISSET(sp, SC_ARGRECOVER))
 379                                 F_SET(frp, FR_RECOVER);
 380                 }
 381
 382                 if (file_init(sp, frp, NULL, 0))
 383                         goto err;
 384                 if (EXCMD_RUNNING(wp)) {
 385                         (void)ex_cmd(sp);
 386                         if (F_ISSET(sp, SC_EXIT | SC_EXIT_FORCE)) {
 387                                 if (screen_end(sp))
 388                                         goto err;
 389                                 goto done;
 390                         }
 391                 }
 392         }
 393
 394         /*
 395          * Check to see if we need to wait for ex.  If SC_SCR_EX is set, ex
 396          * was forced to initialize the screen during startup.  We'd like to
 397          * wait for a single character from the user, but we can't because
 398          * we're not in raw mode.  We can't switch to raw mode because the
 399          * vi initialization will switch to xterm's alternate screen, causing
 400          * us to lose the messages we're pausing to make sure the user read.
 401          * So, wait for a complete line.
 402          */
 403         if (F_ISSET(sp, SC_SCR_EX)) {
 404                 p = msg_cmsg(sp, CMSG_CONT_R, &len);
 405                 (void)write(STDOUT_FILENO, p, len);
 406                 for (;;) {
 407                         if (v_event_get(sp, &ev, 0, 0))
 408                                 goto err;
 409                         if (ev.e_event == E_INTERRUPT ||
 410                             ev.e_event == E_CHARACTER &&
 411                             (ev.e_value == K_CR || ev.e_value == K_NL))
 412                                 break;
 413                         (void)gp->scr_bell(sp);
 414                 }
 415         }
 416
 417         /* Switch into the right editor, regardless. */
 418         F_CLR(sp, SC_EX | SC_VI);
 419         F_SET(sp, LF_ISSET(SC_EX | SC_VI) | SC_STATUS_CNT);
 420
 421         /*
 422          * Main edit loop.  Vi handles split screens itself, we only return
 423          * here when switching editor modes or restarting the screen.
 424          */
 425         while (sp != NULL)
 426                 if (F_ISSET(sp, SC_EX) ? ex(&sp) : vi(&sp))
 427                         goto err;
 428
 429 done:   rval = 0;
 430         if (0)
 431 err:            rval = 1;
 432
 433         return (rval);
 434 }
 435
 436 /*
 437  * v_obsolete --
 438  *      Convert historic arguments into something getopt(3) will like.
 439  */
 440 static int
 441 v_obsolete(name, argv)
 442         char *name, *argv[];
 443 {
 444         size_t len;
 445         char *p;
 446
 447         /*
 448          * Translate old style arguments into something getopt will like.
 449          * Make sure it's not text space memory, because ex modifies the
 450          * strings.
 451          *      Change "+" into "-c$".
 452          *      Change "+<anything else>" into "-c<anything else>".
 453          *      Change "-" into "-s"
 454          *      The c, T, t and w options take arguments so they can't be
 455          *          special arguments.
 456          *
 457          * Stop if we find "--" as an argument, the user may want to edit
 458          * a file named "+foo".
 459          */
 460         while (*++argv && strcmp(argv[0], "--"))
 461                 if (argv[0][0] == '+') {
 462                         if (argv[0][1] == '\0') {
 463                                 MALLOC_NOMSG(NULL, argv[0], char *, 4);
 464                                 if (argv[0] == NULL)
 465                                         goto nomem;
 466                                 (void)strcpy(argv[0], "-c$");
 467                         } else  {
 468                                 p = argv[0];
 469                                 len = strlen(argv[0]);
 470                                 MALLOC_NOMSG(NULL, argv[0], char *, len + 2);
 471                                 if (argv[0] == NULL)
 472                                         goto nomem;
 473                                 argv[0][0] = '-';
 474                                 argv[0][1] = 'c';
 475                                 (void)strcpy(argv[0] + 2, p + 1);
 476                         }
 477                 } else if (argv[0][0] == '-')
 478                         if (argv[0][1] == '\0') {
 479                                 MALLOC_NOMSG(NULL, argv[0], char *, 3);
 480                                 if (argv[0] == NULL) {
 481 nomem:                                  v_estr(name, errno, NULL);
 482                                         return (1);
 483                                 }
 484                                 (void)strcpy(argv[0], "-s");
 485                         } else
 486                                 if ((argv[0][1] == 'c' || argv[0][1] == 'T' ||
 487                                     argv[0][1] == 't' || argv[0][1] == 'w') &&
 488                                     argv[0][2] == '\0')
 489                                         ++argv;
 490         return (0);
 491 }
 492
 493 #ifdef DEBUG
 494 static void
 495 attach(gp)
 496         GS *gp;
 497 {
 498         int fd;
 499         char ch;
 500
 501         if ((fd = open(_PATH_TTY, O_RDONLY, 0)) < 0) {
 502                 v_estr(gp->progname, errno, _PATH_TTY);
 503                 return;
 504         }
 505
 506         (void)printf("process %lu waiting, enter <CR> to continue: ",
 507             (u_long)getpid());
 508         (void)fflush(stdout);
 509
 510         do {
 511                 if (read(fd, &ch, 1) != 1) {
 512                         (void)close(fd);
 513                         return;
 514                 }
 515         } while (ch != '\n' && ch != '\r');
 516         (void)close(fd);
 517 }
 518 #endif
 519
 520 static void
 521 v_estr(name, eno, msg)
 522         char *name, *msg;
 523         int eno;
 524 {
 525         (void)fprintf(stderr, "%s", name);
 526         if (msg != NULL)
 527                 (void)fprintf(stderr, ": %s", msg);
 528         if (eno)
 529                 (void)fprintf(stderr, ": %s", strerror(errno));
 530         (void)fprintf(stderr, "\n");
 531 }