external/bsd/nvi/dist/common/msg.c

   1 /*      $NetBSD: msg.c,v 1.2 2013/11/22 15:52:05 christos Exp $ */
   2 /*-
   3  * Copyright (c) 1991, 1993, 1994
   4  *      The Regents of the University of California.  All rights reserved.
   5  * Copyright (c) 1991, 1993, 1994, 1995, 1996
   6  *      Keith Bostic.  All rights reserved.
   7  *
   8  * See the LICENSE file for redistribution information.
   9  */
  10
  11 #include "config.h"
  12
  13 #ifndef lint
  14 static const char sccsid[] = "Id: msg.c,v 10.61 2003/07/18 23:17:30 skimo Exp  (Berkeley) Date: 2003/07/18 23:17:30 ";
  15 #endif /* not lint */
  16
  17 #include <sys/param.h>
  18 #include <sys/types.h>          /* XXX: param.h may not have included types.h */
  19 #include <sys/queue.h>
  20 #include <sys/stat.h>
  21 #include <sys/time.h>
  22
  23 #include <bitstring.h>
  24 #include <ctype.h>
  25 #include <errno.h>
  26 #include <fcntl.h>
  27 #include <limits.h>
  28 #include <stdio.h>
  29 #include <stdlib.h>
  30 #include <string.h>
  31 #include <unistd.h>
  32
  33 #ifdef __STDC__
  34 #include <stdarg.h>
  35 #else
  36 #include <varargs.h>
  37 #endif
  38
  39 #include "common.h"
  40 #include "dbinternal.h"
  41 #include "../vi/vi.h"
  42
  43 /*
  44  * msgq --
  45  *      Display a message.
  46  *
  47  * PUBLIC: void msgq __P((SCR *, mtype_t, const char *, ...));
  48  */
  49 void
  50 #ifdef __STDC__
  51 msgq(SCR *sp, mtype_t mt, const char *fmt, ...)
  52 #else
  53 msgq(sp, mt, fmt, va_alist)
  54         SCR *sp;
  55         mtype_t mt;
  56         const char *fmt;
  57         va_dcl
  58 #endif
  59 {
  60 #ifndef NL_ARGMAX
  61 #define __NL_ARGMAX     20              /* Set to 9 by System V. */
  62         struct {
  63                 const char *str;        /* String pointer. */
  64                 size_t   arg;           /* Argument number. */
  65                 size_t   prefix;        /* Prefix string length. */
  66                 size_t   skip;          /* Skipped string length. */
  67                 size_t   suffix;        /* Suffix string length. */
  68         } str[__NL_ARGMAX];
  69 #endif
  70         static int reenter;             /* STATIC: Re-entrancy check. */
  71         GS *gp;
  72         WIN *wp = NULL;
  73         size_t blen, len, mlen, nlen;
  74         const char *p;
  75         char *bp, *mp;
  76         va_list ap;
  77 #ifndef NL_ARGMAX
  78         int ch;
  79         char *rbp, *s_rbp;
  80         const char *t, *u;
  81         size_t cnt1, cnt2, soff;
  82 #endif
  83
  84         /*
  85          * !!!
  86          * It's possible to enter msg when there's no screen to hold the
  87          * message.  If sp is NULL, ignore the special cases and put the
  88          * message out to stderr.
  89          */
  90         if (sp == NULL) {
  91                 gp = NULL;
  92                 if (mt == M_BERR)
  93                         mt = M_ERR;
  94                 else if (mt == M_VINFO)
  95                         mt = M_INFO;
  96         } else {
  97                 gp = sp->gp;
  98                 wp = sp->wp;
  99                 switch (mt) {
 100                 case M_BERR:
 101                         if (F_ISSET(sp, SC_VI) && !O_ISSET(sp, O_VERBOSE)) {
 102                                 F_SET(gp, G_BELLSCHED);
 103                                 return;
 104                         }
 105                         mt = M_ERR;
 106                         break;
 107                 case M_VINFO:
 108                         if (!O_ISSET(sp, O_VERBOSE))
 109                                 return;
 110                         mt = M_INFO;
 111                         /* FALLTHROUGH */
 112                 case M_INFO:
 113                         if (F_ISSET(sp, SC_EX_SILENT))
 114                                 return;
 115                         break;
 116                 case M_ERR:
 117                 case M_SYSERR:
 118                 case M_DBERR:
 119                         break;
 120                 default:
 121                         abort();
 122                 }
 123         }
 124
 125         /*
 126          * It's possible to reenter msg when it allocates space.  We're
 127          * probably dead anyway, but there's no reason to drop core.
 128          *
 129          * XXX
 130          * Yes, there's a race, but it should only be two instructions.
 131          */
 132         if (reenter++)
 133                 return;
 134
 135         /* Get space for the message. */
 136         nlen = 1024;
 137         if (0) {
 138 retry:          FREE_SPACE(sp, bp, blen);
 139                 nlen *= 2;
 140         }
 141         bp = NULL;
 142         blen = 0;
 143         GET_SPACE_GOTOC(sp, bp, blen, nlen);
 144
 145         /*
 146          * Error prefix.
 147          *
 148          * mp:   pointer to the current next character to be written
 149          * mlen: length of the already written characters
 150          * blen: total length of the buffer
 151          */
 152 #define REM     (blen - mlen)
 153         mp = bp;
 154         mlen = 0;
 155         if (mt == M_SYSERR || mt == M_DBERR) {
 156                 p = msg_cat(sp, "020|Error: ", &len);
 157                 if (REM < len)
 158                         goto retry;
 159                 memcpy(mp, p, len);
 160                 mp += len;
 161                 mlen += len;
 162         }
 163
 164         /*
 165          * If we're running an ex command that the user didn't enter, display
 166          * the file name and line number prefix.
 167          */
 168         if ((mt == M_ERR || mt == M_SYSERR) &&
 169             sp != NULL && wp != NULL && wp->if_name != NULL) {
 170                 for (p = wp->if_name; *p != '\0'; ++p) {
 171                         len = snprintf(mp, REM, "%s", KEY_NAME(sp, *p));
 172                         mp += len;
 173                         if ((mlen += len) > blen)
 174                                 goto retry;
 175                 }
 176                 len = snprintf(mp, REM, ", %d: ", wp->if_lno);
 177                 mp += len;
 178                 if ((mlen += len) > blen)
 179                         goto retry;
 180         }
 181
 182         /* If nothing to format, we're done. */
 183         if (fmt == NULL)
 184                 goto nofmt;
 185         fmt = msg_cat(sp, fmt, NULL);
 186
 187 #ifndef NL_ARGMAX
 188         /*
 189          * Nvi should run on machines that don't support the numbered argument
 190          * specifications (%[digit]*$).  We do this by reformatting the string
 191          * so that we can hand it to vsprintf(3) and it will use the arguments
 192          * in the right order.  When vsprintf returns, we put the string back
 193          * into the right order.  It's undefined, according to SVID III, to mix
 194          * numbered argument specifications with the standard style arguments,
 195          * so this should be safe.
 196          *
 197          * In addition, we also need a character that is known to not occur in
 198          * any vi message, for separating the parts of the string.  As callers
 199          * of msgq are responsible for making sure that all the non-printable
 200          * characters are formatted for printing before calling msgq, we use a
 201          * random non-printable character selected at terminal initialization
 202          * time.  This code isn't fast by any means, but as messages should be
 203          * relatively short and normally have only a few arguments, it won't be
 204          * too bad.  Regardless, nobody has come up with any other solution.
 205          *
 206          * The result of this loop is an array of pointers into the message
 207          * string, with associated lengths and argument numbers.  The array
 208          * is in the "correct" order, and the arg field contains the argument
 209          * order.
 210          */
 211         for (p = fmt, soff = 0; soff < __NL_ARGMAX;) {
 212                 for (t = p; *p != '\0' && *p != '%'; ++p);
 213                 if (*p == '\0')
 214                         break;
 215                 ++p;
 216                 if (!isdigit((unsigned char)*p)) {
 217                         if (*p == '%')
 218                                 ++p;
 219                         continue;
 220                 }
 221                 for (u = p; *++p != '\0' && isdigit((unsigned char)*p););
 222                 if (*p != '$')
 223                         continue;
 224
 225                 /* Up to, and including the % character. */
 226                 str[soff].str = t;
 227                 str[soff].prefix = u - t;
 228
 229                 /* Up to, and including the $ character. */
 230                 str[soff].arg = atoi(u);
 231                 str[soff].skip = (p - u) + 1;
 232                 if (str[soff].arg >= __NL_ARGMAX)
 233                         goto ret;
 234
 235                 /* Up to, and including the conversion character. */
 236                 for (u = p; (ch = (unsigned char)*++p) != '\0';)
 237                         if (isalpha(ch) &&
 238                             strchr("diouxXfeEgGcspn", ch) != NULL)
 239                                 break;
 240                 str[soff].suffix = p - u;
 241                 if (ch != '\0')
 242                         ++p;
 243                 ++soff;
 244         }
 245
 246         /* If no magic strings, we're done. */
 247         if (soff == 0)
 248                 goto format;
 249
 250          /* Get space for the reordered strings. */
 251         if ((rbp = malloc(nlen)) == NULL)
 252                 goto ret;
 253         s_rbp = rbp;
 254
 255         /*
 256          * Reorder the strings into the message string based on argument
 257          * order.
 258          *
 259          * !!!
 260          * We ignore arguments that are out of order, i.e. if we don't find
 261          * an argument, we continue.  Assume (almost certainly incorrectly)
 262          * that whoever created the string knew what they were doing.
 263          *
 264          * !!!
 265          * Brute force "sort", but since we don't expect more than one or two
 266          * arguments in a string, the setup cost of a fast sort will be more
 267          * expensive than the loop.
 268          */
 269         for (cnt1 = 1; cnt1 <= soff; ++cnt1)
 270                 for (cnt2 = 0; cnt2 < soff; ++cnt2)
 271                         if (cnt1 == str[cnt2].arg) {
 272                                 memmove(s_rbp, str[cnt2].str, str[cnt2].prefix);
 273                                 memmove(s_rbp + str[cnt2].prefix,
 274                                     str[cnt2].str + str[cnt2].prefix +
 275                                     str[cnt2].skip, str[cnt2].suffix);
 276                                 s_rbp += str[cnt2].prefix + str[cnt2].suffix;
 277                                 *s_rbp++ =
 278                                     gp == NULL ? DEFAULT_NOPRINT : gp->noprint;
 279                                 break;
 280                         }
 281         *s_rbp = '\0';
 282         fmt = rbp;
 283 #endif
 284
 285 #ifndef NL_ARGMAX
 286 format: /* Format the arguments into the string. */
 287 #endif
 288 #ifdef __STDC__
 289         va_start(ap, fmt);
 290 #else
 291         va_start(ap);
 292 #endif
 293         len = vsnprintf(mp, REM, fmt, ap);
 294         va_end(ap);
 295         if (len >= nlen)
 296                 goto retry;
 297
 298 #ifndef NL_ARGMAX
 299         if (soff == 0)
 300                 goto nofmt;
 301
 302         /*
 303          * Go through the resulting string, and, for each separator character
 304          * separated string, enter its new starting position and length in the
 305          * array.
 306          */
 307         for (p = t = mp, cnt1 = 1,
 308             ch = gp == NULL ? DEFAULT_NOPRINT : gp->noprint; *p != '\0'; ++p)
 309                 if (*p == ch) {
 310                         for (cnt2 = 0; cnt2 < soff; ++cnt2)
 311                                 if (str[cnt2].arg == cnt1)
 312                                         break;
 313                         str[cnt2].str = t;
 314                         str[cnt2].prefix = p - t;
 315                         t = p + 1;
 316                         ++cnt1;
 317                 }
 318
 319         /*
 320          * Reorder the strings once again, putting them back into the
 321          * message buffer.
 322          *
 323          * !!!
 324          * Note, the length of the message gets decremented once for
 325          * each substring, when we discard the separator character.
 326          */
 327         for (s_rbp = rbp, cnt1 = 0; cnt1 < soff; ++cnt1) {
 328                 memmove(rbp, str[cnt1].str, str[cnt1].prefix);
 329                 rbp += str[cnt1].prefix;
 330                 --len;
 331         }
 332         memmove(mp, s_rbp, rbp - s_rbp);
 333
 334         /* Free the reordered string memory. */
 335         free(s_rbp);
 336 #endif
 337
 338 nofmt:  mp += len;
 339         if ((mlen += len) > blen)
 340                 goto retry;
 341         if (mt == M_SYSERR) {
 342                 len = snprintf(mp, REM, ": %s", strerror(errno));
 343                 mp += len;
 344                 if ((mlen += len) > blen)
 345                         goto retry;
 346                 mt = M_ERR;
 347         }
 348         if (mt == M_DBERR) {
 349                 len = snprintf(mp, REM, ": %s", db_strerror(sp->db_error));
 350                 mp += len;
 351                 if ((mlen += len) > blen)
 352                         goto retry;
 353                 mt = M_ERR;
 354         }
 355
 356         /* Add trailing newline. */
 357         if ((mlen += 1) > blen)
 358                 goto retry;
 359         *mp = '\n';
 360
 361         if (sp != NULL && sp->ep != NULL)
 362                 (void)ex_fflush(sp);
 363         if (wp != NULL)
 364                 wp->scr_msg(sp, mt, bp, mlen);
 365         else
 366                 (void)fprintf(stderr, "%.*s", (int)mlen, bp);
 367
 368         /* Cleanup. */
 369 #ifndef NL_ARGMAX
 370 ret:
 371 #endif
 372         FREE_SPACE(sp, bp, blen);
 373 alloc_err:
 374         reenter = 0;
 375 }
 376
 377 /*
 378  * msgq_str --
 379  *      Display a message with an embedded string.
 380  *
 381  * PUBLIC: void msgq_wstr __P((SCR *, mtype_t, const CHAR_T *, const char *));
 382  */
 383 void
 384 msgq_wstr(SCR *sp, mtype_t mtype, const CHAR_T *str, const char *fmt)
 385 {
 386         size_t nlen;
 387         const char *nstr;
 388
 389         if (str == NULL) {
 390                 msgq(sp, mtype, "%s", fmt);
 391                 return;
 392         }
 393         INT2CHAR(sp, str, STRLEN(str) + 1, nstr, nlen);
 394         msgq_str(sp, mtype, nstr, fmt);
 395 }
 396
 397 /*
 398  * msgq_str --
 399  *      Display a message with an embedded string.
 400  *
 401  * PUBLIC: void msgq_str __P((SCR *, mtype_t, const char *, const char *));
 402  */
 403 void
 404 msgq_str(SCR *sp, mtype_t mtype, const char *str, const char *fmt)
 405 {
 406         int nf, sv_errno;
 407         char *p;
 408
 409         if (str == NULL) {
 410                 msgq(sp, mtype, "%s", fmt);
 411                 return;
 412         }
 413
 414         sv_errno = errno;
 415         p = msg_print(sp, str, &nf);
 416         errno = sv_errno;
 417         msgq(sp, mtype, fmt, p);
 418         if (nf)
 419                 FREE_SPACE(sp, p, 0);
 420 }
 421
 422 /*
 423  * mod_rpt --
 424  *      Report on the lines that changed.
 425  *
 426  * !!!
 427  * Historic vi documentation (USD:15-8) claimed that "The editor will also
 428  * always tell you when a change you make affects text which you cannot see."
 429  * This wasn't true -- edit a large file and do "100d|1".  We don't implement
 430  * this semantic since it requires tracking each line that changes during a
 431  * command instead of just keeping count.
 432  *
 433  * Line counts weren't right in historic vi, either.  For example, given the
 434  * file:
 435  *      abc
 436  *      def
 437  * the command 2d}, from the 'b' would report that two lines were deleted,
 438  * not one.
 439  *
 440  * PUBLIC: void mod_rpt __P((SCR *));
 441  */
 442 void
 443 mod_rpt(SCR *sp)
 444 {
 445         static const char * const action[] = {
 446                 "293|added",
 447                 "294|changed",
 448                 "295|deleted",
 449                 "296|joined",
 450                 "297|moved",
 451                 "298|shifted",
 452                 "299|yanked",
 453         };
 454         static const char * const lines[] = {
 455                 "300|line",
 456                 "301|lines",
 457         };
 458         db_recno_t total;
 459         u_long rptval;
 460         int first;
 461         size_t cnt, blen, len, tlen;
 462         const char *t;
 463         const char * const *ap;
 464         char *bp, *p;
 465
 466         /* Change reports are turned off in batch mode. */
 467         if (F_ISSET(sp, SC_EX_SILENT))
 468                 return;
 469
 470         /* Reset changing line number. */
 471         sp->rptlchange = OOBLNO;
 472
 473         /*
 474          * Don't build a message if not enough changed.
 475          *
 476          * !!!
 477          * And now, a vi clone test.  Historically, vi reported if the number
 478          * of changed lines was > than the value, not >=, unless it was a yank
 479          * command, which used >=.  No lie.  Furthermore, an action was never
 480          * reported for a single line action.  This is consistent for actions
 481          * other than yank, but yank didn't report single line actions even if
 482          * the report edit option was set to 1.  In addition, setting report to
 483          * 0 in the 4BSD historic vi was equivalent to setting it to 1, for an
 484          * unknown reason (this bug was fixed in System III/V at some point).
 485          * I got complaints, so nvi conforms to System III/V historic practice
 486          * except that we report a yank of 1 line if report is set to 1.
 487          */
 488 #define ARSIZE(a)       sizeof(a) / sizeof (*a)
 489 #define MAXNUM          25
 490         rptval = O_VAL(sp, O_REPORT);
 491         for (cnt = 0, total = 0; cnt < ARSIZE(action); ++cnt)
 492                 total += sp->rptlines[cnt];
 493         if (total == 0)
 494                 return;
 495         if (total <= rptval && sp->rptlines[L_YANKED] < rptval) {
 496                 for (cnt = 0; cnt < ARSIZE(action); ++cnt)
 497                         sp->rptlines[cnt] = 0;
 498                 return;
 499         }
 500
 501         /* Build and display the message. */
 502         GET_SPACE_GOTOC(sp, bp, blen, sizeof(action) * MAXNUM + 1);
 503         for (p = bp, first = 1, tlen = 0,
 504             ap = action, cnt = 0; cnt < ARSIZE(action); ++ap, ++cnt)
 505                 if (sp->rptlines[cnt] != 0) {
 506                         if (first)
 507                                 first = 0;
 508                         else {
 509                                 *p++ = ';';
 510                                 *p++ = ' ';
 511                                 tlen += 2;
 512                         }
 513                         len = snprintf(p, MAXNUM, "%lu ",
 514                                 (unsigned long) sp->rptlines[cnt]);
 515                         p += len;
 516                         tlen += len;
 517                         t = msg_cat(sp,
 518                             lines[sp->rptlines[cnt] == 1 ? 0 : 1], &len);
 519                         memcpy(p, t, len);
 520                         p += len;
 521                         tlen += len;
 522                         *p++ = ' ';
 523                         ++tlen;
 524                         t = msg_cat(sp, *ap, &len);
 525                         memcpy(p, t, len);
 526                         p += len;
 527                         tlen += len;
 528                         sp->rptlines[cnt] = 0;
 529                 }
 530
 531         /* Add trailing newline. */
 532         *p = '\n';
 533         ++tlen;
 534
 535         (void)ex_fflush(sp);
 536         sp->wp->scr_msg(sp, M_INFO, bp, tlen);
 537
 538         FREE_SPACE(sp, bp, blen);
 539 alloc_err:
 540         return;
 541
 542 #undef ARSIZE
 543 #undef MAXNUM
 544 }
 545
 546 /*
 547  * msgq_status --
 548  *      Report on the file's status.
 549  *
 550  * PUBLIC: void msgq_status __P((SCR *, db_recno_t, u_int));
 551  */
 552 void
 553 msgq_status(SCR *sp, db_recno_t lno, u_int flags)
 554 {
 555         db_recno_t last;
 556         size_t blen, len;
 557         int cnt, needsep;
 558         const char *t;
 559         char **ap, *bp, *np, *p, *s;
 560
 561         /* Get sufficient memory. */
 562         len = strlen(sp->frp->name);
 563         GET_SPACE_GOTOC(sp, bp, blen, len * MAX_CHARACTER_COLUMNS + 128);
 564         p = bp;
 565
 566         /* Copy in the filename. */
 567         for (p = bp, t = sp->frp->name; *t != '\0'; ++t) {
 568                 len = KEY_LEN(sp, *t);
 569                 memcpy(p, KEY_NAME(sp, *t), len);
 570                 p += len;
 571         }
 572         np = p;
 573         *p++ = ':';
 574         *p++ = ' ';
 575
 576         /* Copy in the argument count. */
 577         if (F_ISSET(sp, SC_STATUS_CNT) && sp->argv != NULL) {
 578                 for (cnt = 0, ap = sp->argv; *ap != NULL; ++ap, ++cnt);
 579                 if (cnt > 1) {
 580                         (void)sprintf(p,
 581                             msg_cat(sp, "317|%d files to edit", NULL), cnt);
 582                         p += strlen(p);
 583                         *p++ = ':';
 584                         *p++ = ' ';
 585                 }
 586                 F_CLR(sp, SC_STATUS_CNT);
 587         }
 588
 589         /*
 590          * See nvi/exf.c:file_init() for a description of how and when the
 591          * read-only bit is set.
 592          *
 593          * !!!
 594          * The historic display for "name changed" was "[Not edited]".
 595          */
 596         needsep = 0;
 597         if (F_ISSET(sp->frp, FR_NEWFILE)) {
 598                 F_CLR(sp->frp, FR_NEWFILE);
 599                 t = msg_cat(sp, "021|new file", &len);
 600                 memcpy(p, t, len);
 601                 p += len;
 602                 needsep = 1;
 603         } else {
 604                 if (F_ISSET(sp->frp, FR_NAMECHANGE)) {
 605                         t = msg_cat(sp, "022|name changed", &len);
 606                         memcpy(p, t, len);
 607                         p += len;
 608                         needsep = 1;
 609                 }
 610                 if (needsep) {
 611                         *p++ = ',';
 612                         *p++ = ' ';
 613                 }
 614                 if (F_ISSET(sp->ep, F_MODIFIED))
 615                         t = msg_cat(sp, "023|modified", &len);
 616                 else
 617                         t = msg_cat(sp, "024|unmodified", &len);
 618                 memcpy(p, t, len);
 619                 p += len;
 620                 needsep = 1;
 621         }
 622         if (F_ISSET(sp->frp, FR_UNLOCKED)) {
 623                 if (needsep) {
 624                         *p++ = ',';
 625                         *p++ = ' ';
 626                 }
 627                 t = msg_cat(sp, "025|UNLOCKED", &len);
 628                 memcpy(p, t, len);
 629                 p += len;
 630                 needsep = 1;
 631         }
 632         if (O_ISSET(sp, O_READONLY)) {
 633                 if (needsep) {
 634                         *p++ = ',';
 635                         *p++ = ' ';
 636                 }
 637                 t = msg_cat(sp, "026|readonly", &len);
 638                 memcpy(p, t, len);
 639                 p += len;
 640                 needsep = 1;
 641         }
 642         if (needsep) {
 643                 *p++ = ':';
 644                 *p++ = ' ';
 645         }
 646         if (LF_ISSET(MSTAT_SHOWLAST)) {
 647                 if (db_last(sp, &last))
 648                         return;
 649                 if (last == 0) {
 650                         t = msg_cat(sp, "028|empty file", &len);
 651                         memcpy(p, t, len);
 652                         p += len;
 653                 } else {
 654                         t = msg_cat(sp, "027|line %lu of %lu [%ld%%]", &len);
 655                         (void)sprintf(p, t, lno, last, (lno * 100) / last);
 656                         p += strlen(p);
 657                 }
 658         } else {
 659                 t = msg_cat(sp, "029|line %lu", &len);
 660                 (void)sprintf(p, t, lno);
 661                 p += strlen(p);
 662         }
 663 #ifdef DEBUG
 664         (void)sprintf(p, " (pid %lu)", (u_long)getpid());
 665         p += strlen(p);
 666 #endif
 667         *p++ = '\n';
 668         len = p - bp;
 669
 670         /*
 671          * There's a nasty problem with long path names.  Cscope and tags files
 672          * can result in long paths and vi will request a continuation key from
 673          * the user as soon as it starts the screen.  Unfortunately, the user
 674          * has already typed ahead, and chaos results.  If we assume that the
 675          * characters in the filenames and informational messages only take a
 676          * single screen column each, we can trim the filename.
 677          *
 678          * XXX
 679          * Status lines get put up at fairly awkward times.  For example, when
 680          * you do a filter read (e.g., :read ! echo foo) in the top screen of a
 681          * split screen, we have to repaint the status lines for all the screens
 682          * below the top screen.  We don't want users having to enter continue
 683          * characters for those screens.  Make it really hard to screw this up.
 684          */
 685         s = bp;
 686         if (LF_ISSET(MSTAT_TRUNCATE) && len > sp->cols) {
 687                 for (; s < np && (*s != '/' || (size_t)(p - s) > sp->cols - 3); ++s);
 688                 if (s == np) {
 689                         s = p - (sp->cols - 5);
 690                         *--s = ' ';
 691                 }
 692                 *--s = '.';
 693                 *--s = '.';
 694                 *--s = '.';
 695                 len = p - s;
 696         }
 697
 698         /* Flush any waiting ex messages. */
 699         (void)ex_fflush(sp);
 700
 701         sp->wp->scr_msg(sp, M_INFO, s, len);
 702
 703         FREE_SPACE(sp, bp, blen);
 704 alloc_err:
 705         return;
 706 }
 707
 708 /*
 709  * msg_open --
 710  *      Open the message catalogs.
 711  *
 712  * PUBLIC: int msg_open __P((SCR *, const char *));
 713  */
 714 int
 715 msg_open(SCR *sp, const char *file)
 716 {
 717         /*
 718          * !!!
 719          * Assume that the first file opened is the system default, and that
 720          * all subsequent ones user defined.  Only display error messages
 721          * if we can't open the user defined ones -- it's useful to know if
 722          * the system one wasn't there, but if nvi is being shipped with an
 723          * installed system, the file will be there, if it's not, then the
 724          * message will be repeated every time nvi is started up.
 725          */
 726         static int first = 1;
 727         DB *db;
 728         DBT data, key;
 729         db_recno_t msgno;
 730         char buf[MAXPATHLEN];
 731         const char *p, *t;
 732
 733         if ((p = strrchr(file, '/')) != NULL && p[1] == '\0' &&
 734             (((t = getenv("LC_MESSAGES")) != NULL && t[0] != '\0') ||
 735             ((t = getenv("LANG")) != NULL && t[0] != '\0'))) {
 736                 (void)snprintf(buf, sizeof(buf), "%s%s", file, t);
 737                 p = buf;
 738         } else
 739                 p = file;
 740         if (db_msg_open(sp, p, &db)) {
 741                 if (first) {
 742                         first = 0;
 743                         return (1);
 744                 }
 745                 msgq_str(sp, M_DBERR, p, "%s");
 746                 return (1);
 747         }
 748
 749         /*
 750          * Test record 1 for the magic string.  The msgq call is here so
 751          * the message catalog build finds it.
 752          */
 753 #define VMC     "VI_MESSAGE_CATALOG"
 754         memset(&key, 0, sizeof(key));
 755         key.data = &msgno;
 756         key.size = sizeof(db_recno_t);
 757         memset(&data, 0, sizeof(data));
 758         msgno = 1;
 759         if ((sp->db_error = db_get_low(db, &key, &data, 0)) != 0 ||
 760             data.size != sizeof(VMC) - 1 ||
 761             memcmp(data.data, VMC, sizeof(VMC) - 1)) {
 762                 (void)db_close(db);
 763                 if (first) {
 764                         first = 0;
 765                         return (1);
 766                 }
 767                 msgq_str(sp, M_DBERR, p,
 768                     "030|The file %s is not a message catalog");
 769                 return (1);
 770         }
 771         first = 0;
 772
 773         if (sp->gp->msg != NULL)
 774                 (void)db_close(sp->gp->msg);
 775         sp->gp->msg = db;
 776         return (0);
 777 }
 778
 779 /*
 780  * msg_close --
 781  *      Close the message catalogs.
 782  *
 783  * PUBLIC: void msg_close __P((GS *));
 784  */
 785 void
 786 msg_close(GS *gp)
 787 {
 788         if (gp->msg != NULL) {
 789                 (void)db_close(gp->msg);
 790                 gp->msg = NULL;
 791         }
 792 }
 793
 794 /*
 795  * msg_cont --
 796  *      Return common continuation messages.
 797  *
 798  * PUBLIC: const char *msg_cmsg __P((SCR *, cmsg_t, size_t *));
 799  */
 800 const char *
 801 msg_cmsg(SCR *sp, cmsg_t which, size_t *lenp)
 802 {
 803         switch (which) {
 804         case CMSG_CONF:
 805                 return (msg_cat(sp, "268|confirm? [ynq]", lenp));
 806         case CMSG_CONT:
 807                 return (msg_cat(sp, "269|Press any key to continue: ", lenp));
 808         case CMSG_CONT_EX:
 809                 return (msg_cat(sp,
 810             "270|Press any key to continue [: to enter more ex commands]: ",
 811                     lenp));
 812         case CMSG_CONT_R:
 813                 return (msg_cat(sp, "161|Press Enter to continue: ", lenp));
 814         case CMSG_CONT_S:
 815                 return (msg_cat(sp, "275| cont?", lenp));
 816         case CMSG_CONT_Q:
 817                 return (msg_cat(sp,
 818                     "271|Press any key to continue [q to quit]: ", lenp));
 819         default:
 820                 abort();
 821         }
 822         /* NOTREACHED */
 823 }
 824
 825 /*
 826  * msg_cat --
 827  *      Return a single message from the catalog, plus its length.
 828  *
 829  * !!!
 830  * Only a single catalog message can be accessed at a time, if multiple
 831  * ones are needed, they must be copied into local memory.
 832  *
 833  * PUBLIC: const char *msg_cat __P((SCR *, const char *, size_t *));
 834  */
 835 const char *
 836 msg_cat(SCR *sp, const char *str, size_t *lenp)
 837 {
 838         GS *gp;
 839         DBT data, key;
 840         db_recno_t msgno;
 841
 842         /*
 843          * If it's not a catalog message, i.e. has doesn't have a leading
 844          * number and '|' symbol, we're done.
 845          */
 846         if (isdigit((unsigned char)str[0]) &&
 847             isdigit((unsigned char)str[1]) && isdigit((unsigned char)str[2]) &&
 848             str[3] == '|') {
 849                 memset(&key, 0, sizeof(key));
 850                 key.data = &msgno;
 851                 key.size = sizeof(db_recno_t);
 852                 memset(&data, 0, sizeof(data));
 853                 msgno = atoi(str);
 854
 855                 /*
 856                  * XXX
 857                  * Really sleazy hack -- we put an extra character on the
 858                  * end of the format string, and then we change it to be
 859                  * the nul termination of the string.  There ought to be
 860                  * a better way.  Once we can allocate multiple temporary
 861                  * memory buffers, maybe we can use one of them instead.
 862                  */
 863                 gp = sp == NULL ? NULL : sp->gp;
 864                 if (gp != NULL && gp->msg != NULL &&
 865                     db_get_low(gp->msg, &key, &data, 0) == 0 &&
 866                     data.size != 0) {
 867                         if (lenp != NULL)
 868                                 *lenp = data.size - 1;
 869                         ((char *)data.data)[data.size - 1] = '\0';
 870                         return (data.data);
 871                 }
 872                 str = &str[4];
 873         }
 874         if (lenp != NULL)
 875                 *lenp = strlen(str);
 876         return (str);
 877 }
 878
 879 /*
 880  * msg_print --
 881  *      Return a printable version of a string, in allocated memory.
 882  *
 883  * PUBLIC: char *msg_print __P((SCR *, const char *, int *));
 884  */
 885 char *
 886 msg_print(SCR *sp, const char *s, int *needfree)
 887 {
 888         size_t blen, nlen;
 889         const char *cp;
 890         char *bp, *ep, *p;
 891         unsigned char *t;
 892
 893         *needfree = 0;
 894
 895         for (cp = s; *cp != '\0'; ++cp)
 896                 if (!isprint((unsigned char)*cp))
 897                         break;
 898         if (*cp == '\0')
 899                 return ((char *)__UNCONST(s));  /* SAFE: needfree set to 0. */
 900
 901         nlen = 0;
 902         if (0) {
 903 retry:          if (sp == NULL)
 904                         free(bp);
 905                 else
 906                         FREE_SPACE(sp, bp, blen);
 907                 *needfree = 0;
 908         }
 909         nlen += 256;
 910         if (sp == NULL) {
 911                 if ((bp = malloc(nlen)) == NULL)
 912                         goto alloc_err;
 913         } else
 914                 GET_SPACE_GOTOC(sp, bp, blen, nlen);
 915         if (0) {
 916 alloc_err:      return __UNCONST("");
 917         }
 918         *needfree = 1;
 919
 920         for (p = bp, ep = (bp + blen) - 1, cp = s; *cp != '\0' && p < ep; ++cp)
 921                 for (t = KEY_NAME(sp, *cp); *t != '\0' && p < ep; *p++ = *t++);
 922         if (p == ep)
 923                 goto retry;
 924         *p = '\0';
 925         return (bp);
 926 }