utils/Install/sfxzip/ttyio.c

   1 /*---------------------------------------------------------------------------
   2
   3   ttyio.c
   4
   5   This file contains routines for doing console input/output, including code
   6   for non-echoing input.  It is used by the encryption/decryption code but
   7   does not contain any restricted code itself.  This file is shared between
   8   Info-ZIP's Zip and UnZip.
   9
  10   Contains:  echo()         (VMS only)
  11              Echon()        (Unix only)
  12              Echoff()       (Unix only)
  13              screenlines()  (Unix only)
  14              zgetch()       (Unix and non-Unix versions)
  15              getp()         ("PC," Unix/Atari/Be, VMS/VMCMS/MVS)
  16
  17   ---------------------------------------------------------------------------*/
  18
  19 #define __TTYIO_C       /* identifies this source module */
  20
  21 #include "zip.h"
  22 #include "crypt.h"
  23
  24 #if (CRYPT || (defined(UNZIP) && !defined(FUNZIP)))
  25 /* Non-echo console/keyboard input is needed for (en/de)cryption's password
  26  * entry, and for UnZip(SFX)'s MORE and Pause features.
  27  * (The corresponding #endif is found at the end of this module.)
  28  */
  29
  30 #include "ttyio.h"
  31
  32 #ifndef PUTC
  33 #  define PUTC putc
  34 #endif
  35
  36 #ifdef ZIP
  37 #  ifdef GLOBAL          /* used in Amiga system headers, maybe others too */
  38 #    undef GLOBAL
  39 #  endif
  40 #  define GLOBAL(g) g
  41 #else
  42 #  define GLOBAL(g) G.g
  43 #endif
  44
  45 #ifdef __BEOS__                /* why yes, we do */
  46 #  define HAVE_TERMIOS_H
  47 #endif
  48
  49 #ifdef _POSIX_VERSION
  50 #  ifndef USE_POSIX_TERMIOS
  51 #    define USE_POSIX_TERMIOS  /* use POSIX style termio (termios) */
  52 #  endif
  53 #  ifndef HAVE_TERMIOS_H
  54 #    define HAVE_TERMIOS_H     /* POSIX termios.h */
  55 #  endif
  56 #endif /* _POSIX_VERSION */
  57
  58 #ifdef UNZIP            /* Zip handles this with the unix/configure script */
  59 #  ifndef _POSIX_VERSION
  60 #    if (defined(SYSV) || defined(CRAY)) &&  !defined(__MINT__)
  61 #      ifndef USE_SYSV_TERMIO
  62 #        define USE_SYSV_TERMIO
  63 #      endif
  64 #      ifdef COHERENT
  65 #        ifndef HAVE_TERMIO_H
  66 #          define HAVE_TERMIO_H
  67 #        endif
  68 #        ifdef HAVE_SYS_TERMIO_H
  69 #          undef HAVE_SYS_TERMIO_H
  70 #        endif
  71 #      else /* !COHERENT */
  72 #        ifdef HAVE_TERMIO_H
  73 #          undef HAVE_TERMIO_H
  74 #        endif
  75 #        ifndef HAVE_SYS_TERMIO_H
  76 #           define HAVE_SYS_TERMIO_H
  77 #        endif
  78 #      endif /* ?COHERENT */
  79 #    endif /* (SYSV || CRAY) && !__MINT__ */
  80 #  endif /* !_POSIX_VERSION */
  81 #  if !(defined(BSD4_4) || defined(SYSV) || defined(__convexc__))
  82 #    ifndef NO_FCNTL_H
  83 #      define NO_FCNTL_H
  84 #    endif
  85 #  endif /* !(BSD4_4 || SYSV || __convexc__) */
  86 #endif /* UNZIP */
  87
  88 #ifdef HAVE_TERMIOS_H
  89 #  ifndef USE_POSIX_TERMIOS
  90 #    define USE_POSIX_TERMIOS
  91 #  endif
  92 #endif
  93
  94 #if (defined(HAVE_TERMIO_H) || defined(HAVE_SYS_TERMIO_H))
  95 #  ifndef USE_SYSV_TERMIO
  96 #    define USE_SYSV_TERMIO
  97 #  endif
  98 #endif
  99
 100 #if (defined(UNZIP) && !defined(FUNZIP) && defined(UNIX) && defined(MORE))
 101 #  include <sys/ioctl.h>
 102 #  define GOT_IOCTL_H
 103    /* int ioctl OF((int, int, zvoid *));   GRR: may need for some systems */
 104 #endif
 105
 106 #ifndef HAVE_WORKING_GETCH
 107    /* include system support for switching of console echo */
 108 #  ifdef VMS
 109 #    include <descrip.h>
 110 #    include <iodef.h>
 111 #    include <ttdef.h>
 112 #    include <starlet.h>
 113 #    include <ssdef.h>
 114 #  else /* !VMS */
 115 #    ifdef HAVE_TERMIOS_H
 116 #      include <termios.h>
 117 #      define sgttyb termios
 118 #      define sg_flags c_lflag
 119 #      define GTTY(f, s) tcgetattr(f, (zvoid *) s)
 120 #      define STTY(f, s) tcsetattr(f, TCSAFLUSH, (zvoid *) s)
 121 #    else /* !HAVE_TERMIOS_H */
 122 #      ifdef USE_SYSV_TERMIO           /* Amdahl, Cray, all SysV? */
 123 #        ifdef HAVE_TERMIO_H
 124 #          include <termio.h>
 125 #        endif
 126 #        ifdef HAVE_SYS_TERMIO_H
 127 #          include <sys/termio.h>
 128 #        endif
 129 #        ifdef NEED_PTEM
 130 #          include <sys/stream.h>
 131 #          include <sys/ptem.h>
 132 #        endif
 133 #        define sgttyb termio
 134 #        define sg_flags c_lflag
 135 #        define GTTY(f,s) ioctl(f,TCGETA,(zvoid *)s)
 136 #        define STTY(f,s) ioctl(f,TCSETAW,(zvoid *)s)
 137 #      else /* !USE_SYSV_TERMIO */
 138 #        ifndef CMS_MVS
 139 #          if (!defined(MINIX) && !defined(GOT_IOCTL_H))
 140 #            include <sys/ioctl.h>
 141 #          endif
 142 #          include <sgtty.h>
 143 #          define GTTY gtty
 144 #          define STTY stty
 145 #          ifdef UNZIP
 146              /*
 147               * XXX : Are these declarations needed at all ????
 148               */
 149              /*
 150               * GRR: let's find out...   Hmmm, appears not...
 151              int gtty OF((int, struct sgttyb *));
 152              int stty OF((int, struct sgttyb *));
 153               */
 154 #          endif
 155 #        endif /* !CMS_MVS */
 156 #      endif /* ?USE_SYSV_TERMIO */
 157 #    endif /* ?HAVE_TERMIOS_H */
 158 #    ifndef NO_FCNTL_H
 159 #      ifndef UNZIP
 160 #        include <fcntl.h>
 161 #      endif
 162 #    else
 163        char *ttyname OF((int));
 164 #    endif
 165 #  endif /* ?VMS */
 166 #endif /* !HAVE_WORKING_GETCH */
 167
 168
 169
 170 #ifndef HAVE_WORKING_GETCH
 171 #ifdef VMS
 172
 173 /*
 174  * Turn keyboard echoing on or off (VMS).  Loosely based on VMSmunch.c
 175  * and hence on Joe Meadows' file.c code.
 176  */
 177 int echo(opt)
 178     int opt;
 179 {
 180     /*
 181      * For VMS v5.x:
 182      *   IO$_SENSEMODE/SETMODE info:  Programming, Vol. 7A, System Programming,
 183      *     I/O User's: Part I, sec. 8.4.1.1, 8.4.3, 8.4.5, 8.6
 184      *   sys$assign(), sys$qio() info:  Programming, Vol. 4B, System Services,
 185      *     System Services Reference Manual, pp. sys-23, sys-379
 186      *   fixed-length descriptor info:  Programming, Vol. 3, System Services,
 187      *     Intro to System Routines, sec. 2.9.2
 188      * Greg Roelofs, 15 Aug 91
 189      */
 190
 191     /* SKM: make global? */
 192     static struct dsc$descriptor_s DevDesc =
 193         {11, DSC$K_DTYPE_T, DSC$K_CLASS_S, "SYS$COMMAND"};
 194      /* {dsc$w_length, dsc$b_dtype, dsc$b_class, dsc$a_pointer}; */
 195     static short           DevChan, iosb[4];
 196     static long            status;
 197     static unsigned long   oldmode[2], newmode[2];   /* each = 8 bytes */
 198
 199
 200     /* assign a channel to standard input */
 201     status = sys$assign(&DevDesc, &DevChan, 0, 0);
 202     if (!(status & 1))
 203         return status;
 204
 205     /* use sys$qio and the IO$_SENSEMODE function to determine the current
 206      * tty status (for password reading, could use IO$_READVBLK function
 207      * instead, but echo on/off will be more general)
 208      */
 209     status = sys$qiow(0, DevChan, IO$_SENSEMODE, &iosb, 0, 0,
 210                      oldmode, 8, 0, 0, 0, 0);
 211     if (!(status & 1))
 212         return status;
 213     status = iosb[0];
 214     if (!(status & 1))
 215         return status;
 216
 217     /* copy old mode into new-mode buffer, then modify to be either NOECHO or
 218      * ECHO (depending on function argument opt)
 219      */
 220     newmode[0] = oldmode[0];
 221     newmode[1] = oldmode[1];
 222     if (opt == 0)   /* off */
 223         newmode[1] |= TT$M_NOECHO;                      /* set NOECHO bit */
 224     else
 225         newmode[1] &= ~((unsigned long) TT$M_NOECHO);   /* clear NOECHO bit */
 226
 227     /* use the IO$_SETMODE function to change the tty status */
 228     status = sys$qiow(0, DevChan, IO$_SETMODE, &iosb, 0, 0,
 229                      newmode, 8, 0, 0, 0, 0);
 230     if (!(status & 1))
 231         return status;
 232     status = iosb[0];
 233     if (!(status & 1))
 234         return status;
 235
 236     /* deassign the sys$input channel by way of clean-up */
 237     status = sys$dassgn(DevChan);
 238     if (!(status & 1))
 239         return status;
 240
 241     return SS$_NORMAL;   /* we be happy */
 242
 243 } /* end function echo() */
 244
 245
 246 #else /* !VMS:  basically Unix */
 247
 248
 249 /* For VM/CMS and MVS, non-echo terminal input is not (yet?) supported. */
 250 #ifndef CMS_MVS
 251
 252 #ifdef ZIP                      /* moved to globals.h for UnZip */
 253    static int echofd=(-1);      /* file descriptor whose echo is off */
 254 #endif
 255
 256 /*
 257  * Turn echo off for file descriptor f.  Assumes that f is a tty device.
 258  */
 259 void Echoff(__G__ f)
 260     __GDEF
 261     int f;                    /* file descriptor for which to turn echo off */
 262 {
 263     struct sgttyb sg;         /* tty device structure */
 264
 265     GLOBAL(echofd) = f;
 266     GTTY(f, &sg);             /* get settings */
 267     sg.sg_flags &= ~ECHO;     /* turn echo off */
 268     STTY(f, &sg);
 269 }
 270
 271 /*
 272  * Turn echo back on for file descriptor echofd.
 273  */
 274 void Echon(__G)
 275     __GDEF
 276 {
 277     struct sgttyb sg;         /* tty device structure */
 278
 279     if (GLOBAL(echofd) != -1) {
 280         GTTY(GLOBAL(echofd), &sg);    /* get settings */
 281         sg.sg_flags |= ECHO;  /* turn echo on */
 282         STTY(GLOBAL(echofd), &sg);
 283         GLOBAL(echofd) = -1;
 284     }
 285 }
 286
 287 #endif /* !CMS_MVS */
 288 #endif /* ?VMS */
 289
 290
 291 #if (defined(UNZIP) && !defined(FUNZIP))
 292
 293 #if (defined(UNIX) || defined(__BEOS__))
 294 #ifdef MORE
 295
 296 /*
 297  * Get the number of lines on the output terminal.  SCO Unix apparently
 298  * defines TIOCGWINSZ but doesn't support it (!M_UNIX).
 299  *
 300  * GRR:  will need to know width of terminal someday, too, to account for
 301  *       line-wrapping.
 302  */
 303
 304 #if (defined(TIOCGWINSZ) && !defined(M_UNIX))
 305
 306 int screenlines()
 307 {
 308     struct winsize wsz;
 309 #ifdef DEBUG_WINSZ
 310     static int firsttime = TRUE;
 311 #endif
 312
 313     /* see termio(4) under, e.g., SunOS */
 314     if (ioctl(1, TIOCGWINSZ, &wsz) == 0) {
 315 #ifdef DEBUG_WINSZ
 316         if (firsttime) {
 317             firsttime = FALSE;
 318             fprintf(stderr, "ttyio.c screenlines():  ws_row = %d\n",
 319               wsz.ws_row);
 320         }
 321 #endif
 322         /* number of columns = ws_col */
 323         return (wsz.ws_row > 0)? wsz.ws_row : 24;   /* number of rows */
 324
 325     } else {         /* this happens when piping to more(1), for example */
 326 #ifdef DEBUG_WINSZ
 327         if (firsttime) {
 328             firsttime = FALSE;
 329             fprintf(stderr,
 330               "ttyio.c screenlines():  ioctl(TIOCGWINSZ) failed\n"));
 331         }
 332 #endif
 333         return 24;   /* VT-100 assumed to be minimal hardware */
 334     }
 335 }
 336
 337 #else /* !TIOCGWINSZ: service not available, fall back to semi-bogus method */
 338
 339 int screenlines()
 340 {
 341     char *envptr, *getenv();
 342     int n;
 343
 344     /* GRR:  this is overly simplistic, but don't have access to stty/gtty
 345      * system anymore
 346      */
 347     envptr = getenv("LINES");
 348     if (envptr == (char *)NULL || (n = atoi(envptr)) < 5)
 349         return 24;   /* VT-100 assumed to be minimal hardware */
 350     else
 351         return n;
 352 }
 353
 354 #endif /* ?(TIOCGWINSZ && !M_UNIX) */
 355 #endif /* MORE */
 356
 357
 358 /*
 359  * Get a character from the given file descriptor without echo or newline.
 360  */
 361 int zgetch(__G__ f)
 362     __GDEF
 363     int f;                      /* file descriptor from which to read */
 364 {
 365 #if (defined(USE_SYSV_TERMIO) || defined(USE_POSIX_TERMIOS))
 366     char oldmin, oldtim;
 367 #endif
 368     char c;
 369     struct sgttyb sg;           /* tty device structure */
 370
 371     GTTY(f, &sg);               /* get settings */
 372 #if (defined(USE_SYSV_TERMIO) || defined(USE_POSIX_TERMIOS))
 373     oldmin = sg.c_cc[VMIN];     /* save old values */
 374     oldtim = sg.c_cc[VTIME];
 375     sg.c_cc[VMIN] = 1;          /* need only one char to return read() */
 376     sg.c_cc[VTIME] = 0;         /* no timeout */
 377     sg.sg_flags &= ~ICANON;     /* canonical mode off */
 378 #else
 379     sg.sg_flags |= CBREAK;      /* cbreak mode on */
 380 #endif
 381     sg.sg_flags &= ~ECHO;       /* turn echo off, too */
 382     STTY(f, &sg);               /* set cbreak mode */
 383     GLOBAL(echofd) = f;         /* in case ^C hit (not perfect: still CBREAK) */
 384
 385     read(f, &c, 1);             /* read our character */
 386
 387 #if (defined(USE_SYSV_TERMIO) || defined(USE_POSIX_TERMIOS))
 388     sg.c_cc[VMIN] = oldmin;     /* restore old values */
 389     sg.c_cc[VTIME] = oldtim;
 390     sg.sg_flags |= ICANON;      /* canonical mode on */
 391 #else
 392     sg.sg_flags &= ~CBREAK;     /* cbreak mode off */
 393 #endif
 394     sg.sg_flags |= ECHO;        /* turn echo on */
 395     STTY(f, &sg);               /* restore canonical mode */
 396     GLOBAL(echofd) = -1;
 397
 398     return (int)c;
 399 }
 400
 401
 402 #else /* !UNIX && !__BEOS__ */
 403
 404
 405 int zgetch(__G__ f)
 406     __GDEF
 407     int f;    /* file descriptor from which to read (must be open already) */
 408 {
 409     char c, c2;
 410
 411 /*---------------------------------------------------------------------------
 412     Get a character from the given file descriptor without echo; can't fake
 413     CBREAK mode (i.e., newline required), but can get rid of all chars up to
 414     and including newline.
 415   ---------------------------------------------------------------------------*/
 416
 417     echoff(f);
 418     read(f, &c, 1);
 419     if (c != '\n')
 420         do {
 421             read(f, &c2, 1);   /* throw away all other chars up thru newline */
 422         } while (c2 != '\n');
 423     echon();
 424     return (int)c;
 425 }
 426
 427 #endif /* ?(UNIX || __BEOS__) */
 428
 429 #endif /* UNZIP && !FUNZIP */
 430 #endif /* !HAVE_WORKING_GETCH */
 431
 432
 433 #if CRYPT                       /* getp() is only used with full encryption */
 434
 435 /*
 436  * Simple compile-time check for source compatibility between
 437  * zcrypt and ttyio:
 438  */
 439 #if (!defined(CR_MAJORVER) || (CR_MAJORVER < 2) || (CR_MINORVER < 7))
 440    error:  This Info-ZIP tool requires zcrypt 2.7 or later.
 441 #endif
 442
 443 /*
 444  * Get a password of length n-1 or less into *p using the prompt *m.
 445  * The entered password is not echoed.
 446  */
 447
 448 #ifdef HAVE_WORKING_GETCH
 449 /*
 450  * For the AMIGA, getch() is defined as Agetch(), which is in
 451  * amiga/filedate.c; SAS/C 6.x provides a getch(), but since Agetch()
 452  * uses the infrastructure that is already in place in filedate.c, it is
 453  * smaller.  With this function, echoff() and echon() are not needed.
 454  *
 455  * For the MAC, a non-echo macgetch() function is defined in the MacOS
 456  * specific sources which uses the event handling mechanism of the
 457  * desktop window manager to get a character from the keyboard.
 458  *
 459  * For the other systems in this section, a non-echo getch() function
 460  * is either contained the C runtime library (conio package), or getch()
 461  * is defined as an alias for a similar system specific RTL function.
 462  */
 463
 464 #ifndef WINDLL   /* WINDLL does not support a console interface */
 465 #ifndef QDOS     /* QDOS supplies a variant of this function */
 466
 467 /* This is the getp() function for all systems (with TTY type user interface)
 468  * that supply a working `non-echo' getch() function for "raw" console input.
 469  */
 470 char *getp(__G__ m, p, n)
 471     __GDEF
 472     ZCONST char *m;             /* prompt for password */
 473     char *p;                    /* return value: line input */
 474     int n;                      /* bytes available in p[] */
 475 {
 476     char c;                     /* one-byte buffer for read() to use */
 477     int i;                      /* number of characters input */
 478     char *w;                    /* warning on retry */
 479
 480     /* get password */
 481     w = "";
 482     do {
 483         fputs(w, stderr);       /* warning if back again */
 484         fputs(m, stderr);       /* display prompt and flush */
 485         fflush(stderr);
 486         i = 0;
 487         do {                    /* read line, keeping first n characters */
 488             if ((c = (char)getch()) == '\r')
 489                 c = '\n';       /* until user hits CR */
 490             if (c == 8 || c == 127) {
 491                 if (i > 0) i--; /* the `backspace' and `del' keys works */
 492             }
 493             else if (i < n)
 494                 p[i++] = c;     /* truncate past n */
 495         } while (c != '\n');
 496         PUTC('\n', stderr);  fflush(stderr);
 497         w = "(line too long--try again)\n";
 498     } while (p[i-1] != '\n');
 499     p[i-1] = 0;                 /* terminate at newline */
 500
 501     return p;                   /* return pointer to password */
 502
 503 } /* end function getp() */
 504
 505 #endif /* !QDOS */
 506 #endif /* !WINDLL */
 507
 508
 509 #else /* !HAVE_WORKING_GETCH */
 510
 511
 512 #if (defined(UNIX) || defined(__MINT__) || defined(__BEOS__))
 513
 514 #ifndef _PATH_TTY
 515 #  ifdef __MINT__
 516 #    define _PATH_TTY ttyname(2)
 517 #  else
 518 #    define _PATH_TTY "/dev/tty"
 519 #  endif
 520 #endif
 521
 522 char *getp(__G__ m, p, n)
 523     __GDEF
 524     ZCONST char *m;             /* prompt for password */
 525     char *p;                    /* return value: line input */
 526     int n;                      /* bytes available in p[] */
 527 {
 528     char c;                     /* one-byte buffer for read() to use */
 529     int i;                      /* number of characters input */
 530     char *w;                    /* warning on retry */
 531     int f;                      /* file descriptor for tty device */
 532
 533 #ifdef PASSWD_FROM_STDIN
 534     /* Read from stdin. This is unsafe if the password is stored on disk. */
 535     f = 0;
 536 #else
 537     /* turn off echo on tty */
 538
 539     if ((f = open(_PATH_TTY, 0)) == -1)
 540         return NULL;
 541 #endif
 542     /* get password */
 543     w = "";
 544     do {
 545         fputs(w, stderr);       /* warning if back again */
 546         fputs(m, stderr);       /* prompt */
 547         fflush(stderr);
 548         i = 0;
 549         echoff(f);
 550         do {                    /* read line, keeping n */
 551             read(f, &c, 1);
 552             if (i < n)
 553                 p[i++] = c;
 554         } while (c != '\n');
 555         echon();
 556         PUTC('\n', stderr);  fflush(stderr);
 557         w = "(line too long--try again)\n";
 558     } while (p[i-1] != '\n');
 559     p[i-1] = 0;                 /* terminate at newline */
 560
 561 #ifndef PASSWD_FROM_STDIN
 562     close(f);
 563 #endif
 564
 565     return p;                   /* return pointer to password */
 566
 567 } /* end function getp() */
 568
 569 #endif /* UNIX || __MINT__ || __BEOS__ */
 570
 571
 572
 573 #if (defined(VMS) || defined(CMS_MVS))
 574
 575 char *getp(__G__ m, p, n)
 576     __GDEF
 577     ZCONST char *m;             /* prompt for password */
 578     char *p;                    /* return value: line input */
 579     int n;                      /* bytes available in p[] */
 580 {
 581     char c;                     /* one-byte buffer for read() to use */
 582     int i;                      /* number of characters input */
 583     char *w;                    /* warning on retry */
 584     FILE *f;                    /* file structure for SYS$COMMAND device */
 585
 586 #ifdef PASSWD_FROM_STDIN
 587     f = stdin;
 588 #else
 589     if ((f = fopen(ctermid(NULL), "r")) == NULL)
 590         return NULL;
 591 #endif
 592
 593     /* get password */
 594     fflush(stdout);
 595     w = "";
 596     do {
 597         if (*w)                 /* bug: VMS apparently adds \n to NULL fputs */
 598             fputs(w, stderr);   /* warning if back again */
 599         fputs(m, stderr);       /* prompt */
 600         fflush(stderr);
 601         i = 0;
 602         echoff(f);
 603         do {                    /* read line, keeping n */
 604             if ((c = (char)getc(f)) == '\r')
 605                 c = '\n';
 606             if (i < n)
 607                 p[i++] = c;
 608         } while (c != '\n');
 609         echon();
 610         PUTC('\n', stderr);  fflush(stderr);
 611         w = "(line too long--try again)\n";
 612     } while (p[i-1] != '\n');
 613     p[i-1] = 0;                 /* terminate at newline */
 614 #ifndef PASSWD_FROM_STDIN
 615     fclose(f);
 616 #endif
 617
 618     return p;                   /* return pointer to password */
 619
 620 } /* end function getp() */
 621
 622 #endif /* VMS || CMS_MVS */
 623 #endif /* ?HAVE_WORKING_GETCH */
 624 #endif /* CRYPT */
 625 #endif /* CRYPT || (UNZIP && !FUNZIP) */