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 10.62 2001/11/01 10:28:25 skimo Exp $ (Berkeley) $Date: 2001/11/01 10:28:25 $";
  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(WIN *wp, int argc, char **argv)
  54 {
  55         extern int optind;
  56         extern char *optarg;
  57         const char *p;
  58         EVENT ev;
  59         FREF *frp;
  60         SCR *sp;
  61         GS *gp;
  62         size_t len;
  63         u_int flags;
  64         int ch, flagchk, lflag, secure, startup, readonly, rval, silent;
  65         char *tag_f, *wsizearg, path[256];
  66         CHAR_T *w;
  67         size_t wlen;
  68
  69         gp = wp->gp;
  70
  71         /* Initialize the busy routine, if not defined by the screen. */
  72         if (gp->scr_busy == NULL)
  73                 gp->scr_busy = vs_busy;
  74         /* Initialize the message routine, if not defined by the screen. */
  75         if (wp->scr_msg == NULL)
  76                 wp->scr_msg = vs_msg;
  77
  78         /* Set initial screen type and mode based on the program name. */
  79         readonly = 0;
  80         if (!strcmp(gp->progname, "ex") || !strcmp(gp->progname, "nex"))
  81                 LF_INIT(SC_EX);
  82         else {
  83                 /* Nview, view are readonly. */
  84                 if (!strcmp(gp->progname, "nview") ||
  85                     !strcmp(gp->progname, "view"))
  86                         readonly = 1;
  87
  88                 /* Vi is the default. */
  89                 LF_INIT(SC_VI);
  90         }
  91
  92         /* Convert old-style arguments into new-style ones. */
  93         if (v_obsolete(gp->progname, argv))
  94                 return (1);
  95
  96         /* Parse the arguments. */
  97         flagchk = '\0';
  98         tag_f = wsizearg = NULL;
  99         lflag = secure = silent = 0;
 100         startup = 1;
 101
 102         /* Set the file snapshot flag. */
 103         F_SET(gp, G_SNAPSHOT);
 104
 105 #ifdef DEBUG
 106         while ((ch = getopt(argc, argv, "c:D:eFlRrSsT:t:vw:")) != EOF)
 107 #else
 108         while ((ch = getopt(argc, argv, "c:eFlRrSst:vw:")) != EOF)
 109 #endif
 110                 switch (ch) {
 111                 case 'c':               /* Run the command. */
 112                         /*
 113                          * XXX
 114                          * We should support multiple -c options.
 115                          */
 116                         if (gp->c_option != NULL) {
 117                                 v_estr(gp->progname, 0,
 118                                     "only one -c command may be specified.");
 119                                 return (1);
 120                         }
 121                         gp->c_option = optarg;
 122                         break;
 123 #ifdef DEBUG
 124                 case 'D':
 125                         switch (optarg[0]) {
 126                         case 's':
 127                                 startup = 0;
 128                                 break;
 129                         case 'w':
 130                                 attach(gp);
 131                                 break;
 132                         default:
 133                                 v_estr(gp->progname, 0,
 134                                     "usage: -D requires s or w argument.");
 135                                 return (1);
 136                         }
 137                         break;
 138 #endif
 139                 case 'e':               /* Ex mode. */
 140                         LF_CLR(SC_VI);
 141                         LF_SET(SC_EX);
 142                         break;
 143                 case 'F':               /* No snapshot. */
 144                         F_CLR(gp, G_SNAPSHOT);
 145                         break;
 146                 case 'l':               /* Set lisp, showmatch options. */
 147                         lflag = 1;
 148                         break;
 149                 case 'R':               /* Readonly. */
 150                         readonly = 1;
 151                         break;
 152                 case 'r':               /* Recover. */
 153                         if (flagchk == 't') {
 154                                 v_estr(gp->progname, 0,
 155                                     "only one of -r and -t may be specified.");
 156                                 return (1);
 157                         }
 158                         flagchk = 'r';
 159                         break;
 160                 case 'S':
 161                         secure = 1;
 162                         break;
 163                 case 's':
 164                         silent = 1;
 165                         break;
 166 #ifdef TRACE
 167                 case 'T':               /* Trace. */
 168                         (void)vtrace_init(optarg);
 169                         break;
 170 #endif
 171                 case 't':               /* Tag. */
 172                         if (flagchk == 'r') {
 173                                 v_estr(gp->progname, 0,
 174                                     "only one of -r and -t may be specified.");
 175                                 return (1);
 176                         }
 177                         if (flagchk == 't') {
 178                                 v_estr(gp->progname, 0,
 179                                     "only one tag file may be specified.");
 180                                 return (1);
 181                         }
 182                         flagchk = 't';
 183                         tag_f = optarg;
 184                         break;
 185                 case 'v':               /* Vi mode. */
 186                         LF_CLR(SC_EX);
 187                         LF_SET(SC_VI);
 188                         break;
 189                 case 'w':
 190                         wsizearg = optarg;
 191                         break;
 192                 case '?':
 193                 default:
 194                         (void)gp->scr_usage();
 195                         return (1);
 196                 }
 197         argc -= optind;
 198         argv += optind;
 199
 200         /*
 201          * -s option is only meaningful to ex.
 202          *
 203          * If not reading from a terminal, it's like -s was specified.
 204          */
 205         if (silent && !LF_ISSET(SC_EX)) {
 206                 v_estr(gp->progname, 0, "-s option is only applicable to ex.");
 207                 goto err;
 208         }
 209         if (LF_ISSET(SC_EX) && F_ISSET(gp, G_SCRIPTED))
 210                 silent = 1;
 211
 212         /*
 213          * Build and initialize the first/current screen.  This is a bit
 214          * tricky.  If an error is returned, we may or may not have a
 215          * screen structure.  If we have a screen structure, put it on a
 216          * display queue so that the error messages get displayed.
 217          *
 218          * !!!
 219          * Everything we do until we go interactive is done in ex mode.
 220          */
 221         if (screen_init(gp, NULL, &sp)) {
 222                 if (sp != NULL) {
 223                         CIRCLEQ_INSERT_HEAD(&wp->scrq, sp, q);
 224                         sp->wp = wp;
 225                 }
 226                 goto err;
 227         }
 228         F_SET(sp, SC_EX);
 229         CIRCLEQ_INSERT_HEAD(&wp->scrq, sp, q);
 230         sp->wp = wp;
 231
 232         if (v_key_init(sp))             /* Special key initialization. */
 233                 goto err;
 234
 235         { int oargs[5], *oargp = oargs;
 236         if (lflag) {                    /* Command-line options. */
 237                 *oargp++ = O_LISP;
 238                 *oargp++ = O_SHOWMATCH;
 239         }
 240         if (readonly)
 241                 *oargp++ = O_READONLY;
 242         if (secure)
 243                 *oargp++ = O_SECURE;
 244         *oargp = -1;                    /* Options initialization. */
 245         if (opts_init(sp, oargs))
 246                 goto err;
 247         }
 248         if (wsizearg != NULL) {
 249                 ARGS *av[2], a, b;
 250                 (void)snprintf(path, sizeof(path), "window=%s", wsizearg);
 251                 a.bp = (CHAR_T *)path;
 252                 a.len = strlen(path);
 253                 b.bp = NULL;
 254                 b.len = 0;
 255                 av[0] = &a;
 256                 av[1] = &b;
 257                 (void)opts_set(sp, av, NULL);
 258         }
 259         if (silent) {                   /* Ex batch mode option values. */
 260                 O_CLR(sp, O_AUTOPRINT);
 261                 O_CLR(sp, O_PROMPT);
 262                 O_CLR(sp, O_VERBOSE);
 263                 O_CLR(sp, O_WARN);
 264                 F_SET(sp, SC_EX_SILENT);
 265         }
 266
 267         sp->rows = O_VAL(sp, O_LINES);  /* Make ex formatting work. */
 268         sp->cols = O_VAL(sp, O_COLUMNS);
 269
 270         if (!silent && startup) {       /* Read EXINIT, exrc files. */
 271                 if (ex_exrc(sp))
 272                         goto err;
 273                 if (F_ISSET(sp, SC_EXIT | SC_EXIT_FORCE)) {
 274                         if (screen_end(sp))
 275                                 goto err;
 276                         goto done;
 277                 }
 278         }
 279
 280         /*
 281          * List recovery files if -r specified without file arguments.
 282          * Note, options must be initialized and startup information
 283          * read before doing this.
 284          */
 285         if (flagchk == 'r' && argv[0] == NULL) {
 286                 if (rcv_list(sp))
 287                         goto err;
 288                 if (screen_end(sp))
 289                         goto err;
 290                 goto done;
 291         }
 292
 293         /*
 294          * !!!
 295          * Initialize the default ^D, ^U scrolling value here, after the
 296          * user has had every opportunity to set the window option.
 297          *
 298          * It's historic practice that changing the value of the window
 299          * option did not alter the default scrolling value, only giving
 300          * a count to ^D/^U did that.
 301          */
 302         sp->defscroll = (O_VAL(sp, O_WINDOW) + 1) / 2;
 303
 304         /*
 305          * If we don't have a command-line option, switch into the right
 306          * editor now, so that we position default files correctly, and
 307          * so that any tags file file-already-locked messages are in the
 308          * vi screen, not the ex screen.
 309          *
 310          * XXX
 311          * If we have a command-line option, the error message can end
 312          * up in the wrong place, but I think that the combination is
 313          * unlikely.
 314          */
 315         if (gp->c_option == NULL) {
 316                 F_CLR(sp, SC_EX | SC_VI);
 317                 F_SET(sp, LF_ISSET(SC_EX | SC_VI));
 318         }
 319
 320         /* Open a tag file if specified. */
 321         if (tag_f != NULL) {
 322                 CHAR2INT(sp, tag_f, strlen(tag_f) + 1, w, wlen);
 323                 if (ex_tag_first(sp, w))
 324                         goto err;
 325         }
 326
 327         /*
 328          * Append any remaining arguments as file names.  Files are recovery
 329          * files if -r specified.  If the tag option or ex startup commands
 330          * loaded a file, then any file arguments are going to come after it.
 331          */
 332         if (*argv != NULL) {
 333                 if (sp->frp != NULL) {
 334                         /* Cheat -- we know we have an extra argv slot. */
 335                         MALLOC_NOMSG(sp,
 336                             *--argv, char *, strlen(sp->frp->name) + 1);
 337                         if (*argv == NULL) {
 338                                 v_estr(gp->progname, errno, NULL);
 339                                 goto err;
 340                         }
 341                         (void)strcpy(*argv, sp->frp->name);
 342                 }
 343                 sp->argv = sp->cargv = argv;
 344                 F_SET(sp, SC_ARGNOFREE);
 345                 if (flagchk == 'r')
 346                         F_SET(sp, SC_ARGRECOVER);
 347         }
 348
 349         /*
 350          * If the ex startup commands and or/the tag option haven't already
 351          * created a file, create one.  If no command-line files were given,
 352          * use a temporary file.
 353          */
 354         if (sp->frp == NULL) {
 355                 if (sp->argv == NULL) {
 356                         if ((frp = file_add(sp, NULL)) == NULL)
 357                                 goto err;
 358                 } else  {
 359                         if ((frp = file_add(sp, sp->argv[0])) == NULL)
 360                                 goto err;
 361                         if (F_ISSET(sp, SC_ARGRECOVER))
 362                                 F_SET(frp, FR_RECOVER);
 363                 }
 364
 365                 if (file_init(sp, frp, NULL, 0))
 366                         goto err;
 367                 if (EXCMD_RUNNING(wp)) {
 368                         (void)ex_cmd(sp);
 369                         if (F_ISSET(sp, SC_EXIT | SC_EXIT_FORCE)) {
 370                                 if (screen_end(sp))
 371                                         goto err;
 372                                 goto done;
 373                         }
 374                 }
 375         }
 376
 377         /*
 378          * Check to see if we need to wait for ex.  If SC_SCR_EX is set, ex
 379          * was forced to initialize the screen during startup.  We'd like to
 380          * wait for a single character from the user, but we can't because
 381          * we're not in raw mode.  We can't switch to raw mode because the
 382          * vi initialization will switch to xterm's alternate screen, causing
 383          * us to lose the messages we're pausing to make sure the user read.
 384          * So, wait for a complete line.
 385          */
 386         if (F_ISSET(sp, SC_SCR_EX)) {
 387                 p = msg_cmsg(sp, CMSG_CONT_R, &len);
 388                 (void)write(STDOUT_FILENO, p, len);
 389                 for (;;) {
 390                         if (v_event_get(sp, &ev, 0, 0))
 391                                 goto err;
 392                         if (ev.e_event == E_INTERRUPT ||
 393                             (ev.e_event == E_CHARACTER &&
 394                              (ev.e_value == K_CR || ev.e_value == K_NL)))
 395                                 break;
 396                         (void)gp->scr_bell(sp);
 397                 }
 398         }
 399
 400         /* Switch into the right editor, regardless. */
 401         F_CLR(sp, SC_EX | SC_VI);
 402         F_SET(sp, LF_ISSET(SC_EX | SC_VI) | SC_STATUS_CNT);
 403
 404         /*
 405          * Main edit loop.  Vi handles split screens itself, we only return
 406          * here when switching editor modes or restarting the screen.
 407          */
 408         while (sp != NULL)
 409                 if (F_ISSET(sp, SC_EX) ? ex(&sp) : vi(&sp))
 410                         goto err;
 411
 412 done:   rval = 0;
 413         if (0)
 414 err:            rval = 1;
 415
 416         return (rval);
 417 }
 418
 419 /*
 420  * v_obsolete --
 421  *      Convert historic arguments into something getopt(3) will like.
 422  */
 423 static int
 424 v_obsolete(char *name, char **argv)
 425 {
 426         size_t len;
 427         char *p;
 428
 429         /*
 430          * Translate old style arguments into something getopt will like.
 431          * Make sure it's not text space memory, because ex modifies the
 432          * strings.
 433          *      Change "+" into "-c$".
 434          *      Change "+<anything else>" into "-c<anything else>".
 435          *      Change "-" into "-s"
 436          *      The c, T, t and w options take arguments so they can't be
 437          *          special arguments.
 438          *
 439          * Stop if we find "--" as an argument, the user may want to edit
 440          * a file named "+foo".
 441          */
 442         while (*++argv && strcmp(argv[0], "--"))
 443                 if (argv[0][0] == '+') {
 444                         if (argv[0][1] == '\0') {
 445                                 MALLOC_NOMSG(NULL, argv[0], char *, 4);
 446                                 if (argv[0] == NULL)
 447                                         goto nomem;
 448                                 (void)strcpy(argv[0], "-c$");
 449                         } else  {
 450                                 p = argv[0];
 451                                 len = strlen(argv[0]);
 452                                 MALLOC_NOMSG(NULL, argv[0], char *, len + 2);
 453                                 if (argv[0] == NULL)
 454                                         goto nomem;
 455                                 argv[0][0] = '-';
 456                                 argv[0][1] = 'c';
 457                                 (void)strcpy(argv[0] + 2, p + 1);
 458                         }
 459                 } else if (argv[0][0] == '-') {
 460                         if (argv[0][1] == '\0') {
 461                                 MALLOC_NOMSG(NULL, argv[0], char *, 3);
 462                                 if (argv[0] == NULL) {
 463 nomem:                                  v_estr(name, errno, NULL);
 464                                         return (1);
 465                                 }
 466                                 (void)strcpy(argv[0], "-s");
 467                         } else
 468                                 if ((argv[0][1] == 'c' || argv[0][1] == 'T' ||
 469                                     argv[0][1] == 't' || argv[0][1] == 'w') &&
 470                                     argv[0][2] == '\0')
 471                                         ++argv;
 472                 }
 473         return (0);
 474 }
 475
 476 #ifdef DEBUG
 477 static void
 478 attach(GS *gp)
 479 {
 480         int fd;
 481         char ch;
 482
 483         if ((fd = open(_PATH_TTY, O_RDONLY, 0)) < 0) {
 484                 v_estr(gp->progname, errno, _PATH_TTY);
 485                 return;
 486         }
 487
 488         (void)printf("process %lu waiting, enter <CR> to continue: ",
 489             (u_long)getpid());
 490         (void)fflush(stdout);
 491
 492         do {
 493                 if (read(fd, &ch, 1) != 1) {
 494                         (void)close(fd);
 495                         return;
 496                 }
 497         } while (ch != '\n' && ch != '\r');
 498         (void)close(fd);
 499 }
 500 #endif
 501
 502 static void
 503 v_estr(char *name, int eno, char *msg)
 504 {
 505         (void)fprintf(stderr, "%s", name);
 506         if (msg != NULL)
 507                 (void)fprintf(stderr, ": %s", msg);
 508         if (eno)
 509                 (void)fprintf(stderr, ": %s", strerror(errno));
 510         (void)fprintf(stderr, "\n");
 511 }