/*--------------------------------------------------------------------------- ttyio.c This file contains routines for doing console input/output, including code for non-echoing input. It is used by the encryption/decryption code but does not contain any restricted code itself. This file is shared between Info-ZIP's Zip and UnZip. Contains: echo() (VMS only) Echon() (Unix only) Echoff() (Unix only) screenlines() (Unix only) zgetch() (Unix and non-Unix versions) getp() ("PC," Unix/Atari/Be, VMS/VMCMS/MVS) ---------------------------------------------------------------------------*/ #define __TTYIO_C /* identifies this source module */ #include "zip.h" #include "crypt.h" #if (CRYPT || (defined(UNZIP) && !defined(FUNZIP))) /* Non-echo console/keyboard input is needed for (en/de)cryption's password * entry, and for UnZip(SFX)'s MORE and Pause features. * (The corresponding #endif is found at the end of this module.) */ #include "ttyio.h" #ifndef PUTC # define PUTC putc #endif #ifdef ZIP # ifdef GLOBAL /* used in Amiga system headers, maybe others too */ # undef GLOBAL # endif # define GLOBAL(g) g #else # define GLOBAL(g) G.g #endif #ifdef __BEOS__ /* why yes, we do */ # define HAVE_TERMIOS_H #endif #ifdef _POSIX_VERSION # ifndef USE_POSIX_TERMIOS # define USE_POSIX_TERMIOS /* use POSIX style termio (termios) */ # endif # ifndef HAVE_TERMIOS_H # define HAVE_TERMIOS_H /* POSIX termios.h */ # endif #endif /* _POSIX_VERSION */ #ifdef UNZIP /* Zip handles this with the unix/configure script */ # ifndef _POSIX_VERSION # if (defined(SYSV) || defined(CRAY)) && !defined(__MINT__) # ifndef USE_SYSV_TERMIO # define USE_SYSV_TERMIO # endif # ifdef COHERENT # ifndef HAVE_TERMIO_H # define HAVE_TERMIO_H # endif # ifdef HAVE_SYS_TERMIO_H # undef HAVE_SYS_TERMIO_H # endif # else /* !COHERENT */ # ifdef HAVE_TERMIO_H # undef HAVE_TERMIO_H # endif # ifndef HAVE_SYS_TERMIO_H # define HAVE_SYS_TERMIO_H # endif # endif /* ?COHERENT */ # endif /* (SYSV || CRAY) && !__MINT__ */ # endif /* !_POSIX_VERSION */ # if !(defined(BSD4_4) || defined(SYSV) || defined(__convexc__)) # ifndef NO_FCNTL_H # define NO_FCNTL_H # endif # endif /* !(BSD4_4 || SYSV || __convexc__) */ #endif /* UNZIP */ #ifdef HAVE_TERMIOS_H # ifndef USE_POSIX_TERMIOS # define USE_POSIX_TERMIOS # endif #endif #if (defined(HAVE_TERMIO_H) || defined(HAVE_SYS_TERMIO_H)) # ifndef USE_SYSV_TERMIO # define USE_SYSV_TERMIO # endif #endif #if (defined(UNZIP) && !defined(FUNZIP) && defined(UNIX) && defined(MORE)) # include # define GOT_IOCTL_H /* int ioctl OF((int, int, zvoid *)); GRR: may need for some systems */ #endif #ifndef HAVE_WORKING_GETCH /* include system support for switching of console echo */ # ifdef VMS # include # include # include # include # include # else /* !VMS */ # ifdef HAVE_TERMIOS_H # include # define sgttyb termios # define sg_flags c_lflag # define GTTY(f, s) tcgetattr(f, (zvoid *) s) # define STTY(f, s) tcsetattr(f, TCSAFLUSH, (zvoid *) s) # else /* !HAVE_TERMIOS_H */ # ifdef USE_SYSV_TERMIO /* Amdahl, Cray, all SysV? */ # ifdef HAVE_TERMIO_H # include # endif # ifdef HAVE_SYS_TERMIO_H # include # endif # ifdef NEED_PTEM # include # include # endif # define sgttyb termio # define sg_flags c_lflag # define GTTY(f,s) ioctl(f,TCGETA,(zvoid *)s) # define STTY(f,s) ioctl(f,TCSETAW,(zvoid *)s) # else /* !USE_SYSV_TERMIO */ # ifndef CMS_MVS # if (!defined(MINIX) && !defined(GOT_IOCTL_H)) # include # endif # include # define GTTY gtty # define STTY stty # ifdef UNZIP /* * XXX : Are these declarations needed at all ???? */ /* * GRR: let's find out... Hmmm, appears not... int gtty OF((int, struct sgttyb *)); int stty OF((int, struct sgttyb *)); */ # endif # endif /* !CMS_MVS */ # endif /* ?USE_SYSV_TERMIO */ # endif /* ?HAVE_TERMIOS_H */ # ifndef NO_FCNTL_H # ifndef UNZIP # include # endif # else char *ttyname OF((int)); # endif # endif /* ?VMS */ #endif /* !HAVE_WORKING_GETCH */ #ifndef HAVE_WORKING_GETCH #ifdef VMS /* * Turn keyboard echoing on or off (VMS). Loosely based on VMSmunch.c * and hence on Joe Meadows' file.c code. */ int echo(opt) int opt; { /* * For VMS v5.x: * IO$_SENSEMODE/SETMODE info: Programming, Vol. 7A, System Programming, * I/O User's: Part I, sec. 8.4.1.1, 8.4.3, 8.4.5, 8.6 * sys$assign(), sys$qio() info: Programming, Vol. 4B, System Services, * System Services Reference Manual, pp. sys-23, sys-379 * fixed-length descriptor info: Programming, Vol. 3, System Services, * Intro to System Routines, sec. 2.9.2 * Greg Roelofs, 15 Aug 91 */ /* SKM: make global? */ static struct dsc$descriptor_s DevDesc = {11, DSC$K_DTYPE_T, DSC$K_CLASS_S, "SYS$COMMAND"}; /* {dsc$w_length, dsc$b_dtype, dsc$b_class, dsc$a_pointer}; */ static short DevChan, iosb[4]; static long status; static unsigned long oldmode[2], newmode[2]; /* each = 8 bytes */ /* assign a channel to standard input */ status = sys$assign(&DevDesc, &DevChan, 0, 0); if (!(status & 1)) return status; /* use sys$qio and the IO$_SENSEMODE function to determine the current * tty status (for password reading, could use IO$_READVBLK function * instead, but echo on/off will be more general) */ status = sys$qiow(0, DevChan, IO$_SENSEMODE, &iosb, 0, 0, oldmode, 8, 0, 0, 0, 0); if (!(status & 1)) return status; status = iosb[0]; if (!(status & 1)) return status; /* copy old mode into new-mode buffer, then modify to be either NOECHO or * ECHO (depending on function argument opt) */ newmode[0] = oldmode[0]; newmode[1] = oldmode[1]; if (opt == 0) /* off */ newmode[1] |= TT$M_NOECHO; /* set NOECHO bit */ else newmode[1] &= ~((unsigned long) TT$M_NOECHO); /* clear NOECHO bit */ /* use the IO$_SETMODE function to change the tty status */ status = sys$qiow(0, DevChan, IO$_SETMODE, &iosb, 0, 0, newmode, 8, 0, 0, 0, 0); if (!(status & 1)) return status; status = iosb[0]; if (!(status & 1)) return status; /* deassign the sys$input channel by way of clean-up */ status = sys$dassgn(DevChan); if (!(status & 1)) return status; return SS$_NORMAL; /* we be happy */ } /* end function echo() */ #else /* !VMS: basically Unix */ /* For VM/CMS and MVS, non-echo terminal input is not (yet?) supported. */ #ifndef CMS_MVS #ifdef ZIP /* moved to globals.h for UnZip */ static int echofd=(-1); /* file descriptor whose echo is off */ #endif /* * Turn echo off for file descriptor f. Assumes that f is a tty device. */ void Echoff(__G__ f) __GDEF int f; /* file descriptor for which to turn echo off */ { struct sgttyb sg; /* tty device structure */ GLOBAL(echofd) = f; GTTY(f, &sg); /* get settings */ sg.sg_flags &= ~ECHO; /* turn echo off */ STTY(f, &sg); } /* * Turn echo back on for file descriptor echofd. */ void Echon(__G) __GDEF { struct sgttyb sg; /* tty device structure */ if (GLOBAL(echofd) != -1) { GTTY(GLOBAL(echofd), &sg); /* get settings */ sg.sg_flags |= ECHO; /* turn echo on */ STTY(GLOBAL(echofd), &sg); GLOBAL(echofd) = -1; } } #endif /* !CMS_MVS */ #endif /* ?VMS */ #if (defined(UNZIP) && !defined(FUNZIP)) #if (defined(UNIX) || defined(__BEOS__)) #ifdef MORE /* * Get the number of lines on the output terminal. SCO Unix apparently * defines TIOCGWINSZ but doesn't support it (!M_UNIX). * * GRR: will need to know width of terminal someday, too, to account for * line-wrapping. */ #if (defined(TIOCGWINSZ) && !defined(M_UNIX)) int screenlines() { struct winsize wsz; #ifdef DEBUG_WINSZ static int firsttime = TRUE; #endif /* see termio(4) under, e.g., SunOS */ if (ioctl(1, TIOCGWINSZ, &wsz) == 0) { #ifdef DEBUG_WINSZ if (firsttime) { firsttime = FALSE; fprintf(stderr, "ttyio.c screenlines(): ws_row = %d\n", wsz.ws_row); } #endif /* number of columns = ws_col */ return (wsz.ws_row > 0)? wsz.ws_row : 24; /* number of rows */ } else { /* this happens when piping to more(1), for example */ #ifdef DEBUG_WINSZ if (firsttime) { firsttime = FALSE; fprintf(stderr, "ttyio.c screenlines(): ioctl(TIOCGWINSZ) failed\n")); } #endif return 24; /* VT-100 assumed to be minimal hardware */ } } #else /* !TIOCGWINSZ: service not available, fall back to semi-bogus method */ int screenlines() { char *envptr, *getenv(); int n; /* GRR: this is overly simplistic, but don't have access to stty/gtty * system anymore */ envptr = getenv("LINES"); if (envptr == (char *)NULL || (n = atoi(envptr)) < 5) return 24; /* VT-100 assumed to be minimal hardware */ else return n; } #endif /* ?(TIOCGWINSZ && !M_UNIX) */ #endif /* MORE */ /* * Get a character from the given file descriptor without echo or newline. */ int zgetch(__G__ f) __GDEF int f; /* file descriptor from which to read */ { #if (defined(USE_SYSV_TERMIO) || defined(USE_POSIX_TERMIOS)) char oldmin, oldtim; #endif char c; struct sgttyb sg; /* tty device structure */ GTTY(f, &sg); /* get settings */ #if (defined(USE_SYSV_TERMIO) || defined(USE_POSIX_TERMIOS)) oldmin = sg.c_cc[VMIN]; /* save old values */ oldtim = sg.c_cc[VTIME]; sg.c_cc[VMIN] = 1; /* need only one char to return read() */ sg.c_cc[VTIME] = 0; /* no timeout */ sg.sg_flags &= ~ICANON; /* canonical mode off */ #else sg.sg_flags |= CBREAK; /* cbreak mode on */ #endif sg.sg_flags &= ~ECHO; /* turn echo off, too */ STTY(f, &sg); /* set cbreak mode */ GLOBAL(echofd) = f; /* in case ^C hit (not perfect: still CBREAK) */ read(f, &c, 1); /* read our character */ #if (defined(USE_SYSV_TERMIO) || defined(USE_POSIX_TERMIOS)) sg.c_cc[VMIN] = oldmin; /* restore old values */ sg.c_cc[VTIME] = oldtim; sg.sg_flags |= ICANON; /* canonical mode on */ #else sg.sg_flags &= ~CBREAK; /* cbreak mode off */ #endif sg.sg_flags |= ECHO; /* turn echo on */ STTY(f, &sg); /* restore canonical mode */ GLOBAL(echofd) = -1; return (int)c; } #else /* !UNIX && !__BEOS__ */ int zgetch(__G__ f) __GDEF int f; /* file descriptor from which to read (must be open already) */ { char c, c2; /*--------------------------------------------------------------------------- Get a character from the given file descriptor without echo; can't fake CBREAK mode (i.e., newline required), but can get rid of all chars up to and including newline. ---------------------------------------------------------------------------*/ echoff(f); read(f, &c, 1); if (c != '\n') do { read(f, &c2, 1); /* throw away all other chars up thru newline */ } while (c2 != '\n'); echon(); return (int)c; } #endif /* ?(UNIX || __BEOS__) */ #endif /* UNZIP && !FUNZIP */ #endif /* !HAVE_WORKING_GETCH */ #if CRYPT /* getp() is only used with full encryption */ /* * Simple compile-time check for source compatibility between * zcrypt and ttyio: */ #if (!defined(CR_MAJORVER) || (CR_MAJORVER < 2) || (CR_MINORVER < 7)) error: This Info-ZIP tool requires zcrypt 2.7 or later. #endif /* * Get a password of length n-1 or less into *p using the prompt *m. * The entered password is not echoed. */ #ifdef HAVE_WORKING_GETCH /* * For the AMIGA, getch() is defined as Agetch(), which is in * amiga/filedate.c; SAS/C 6.x provides a getch(), but since Agetch() * uses the infrastructure that is already in place in filedate.c, it is * smaller. With this function, echoff() and echon() are not needed. * * For the MAC, a non-echo macgetch() function is defined in the MacOS * specific sources which uses the event handling mechanism of the * desktop window manager to get a character from the keyboard. * * For the other systems in this section, a non-echo getch() function * is either contained the C runtime library (conio package), or getch() * is defined as an alias for a similar system specific RTL function. */ #ifndef WINDLL /* WINDLL does not support a console interface */ #ifndef QDOS /* QDOS supplies a variant of this function */ /* This is the getp() function for all systems (with TTY type user interface) * that supply a working `non-echo' getch() function for "raw" console input. */ char *getp(__G__ m, p, n) __GDEF ZCONST char *m; /* prompt for password */ char *p; /* return value: line input */ int n; /* bytes available in p[] */ { char c; /* one-byte buffer for read() to use */ int i; /* number of characters input */ char *w; /* warning on retry */ /* get password */ w = ""; do { fputs(w, stderr); /* warning if back again */ fputs(m, stderr); /* display prompt and flush */ fflush(stderr); i = 0; do { /* read line, keeping first n characters */ if ((c = (char)getch()) == '\r') c = '\n'; /* until user hits CR */ if (c == 8 || c == 127) { if (i > 0) i--; /* the `backspace' and `del' keys works */ } else if (i < n) p[i++] = c; /* truncate past n */ } while (c != '\n'); PUTC('\n', stderr); fflush(stderr); w = "(line too long--try again)\n"; } while (p[i-1] != '\n'); p[i-1] = 0; /* terminate at newline */ return p; /* return pointer to password */ } /* end function getp() */ #endif /* !QDOS */ #endif /* !WINDLL */ #else /* !HAVE_WORKING_GETCH */ #if (defined(UNIX) || defined(__MINT__) || defined(__BEOS__)) #ifndef _PATH_TTY # ifdef __MINT__ # define _PATH_TTY ttyname(2) # else # define _PATH_TTY "/dev/tty" # endif #endif char *getp(__G__ m, p, n) __GDEF ZCONST char *m; /* prompt for password */ char *p; /* return value: line input */ int n; /* bytes available in p[] */ { char c; /* one-byte buffer for read() to use */ int i; /* number of characters input */ char *w; /* warning on retry */ int f; /* file descriptor for tty device */ #ifdef PASSWD_FROM_STDIN /* Read from stdin. This is unsafe if the password is stored on disk. */ f = 0; #else /* turn off echo on tty */ if ((f = open(_PATH_TTY, 0)) == -1) return NULL; #endif /* get password */ w = ""; do { fputs(w, stderr); /* warning if back again */ fputs(m, stderr); /* prompt */ fflush(stderr); i = 0; echoff(f); do { /* read line, keeping n */ read(f, &c, 1); if (i < n) p[i++] = c; } while (c != '\n'); echon(); PUTC('\n', stderr); fflush(stderr); w = "(line too long--try again)\n"; } while (p[i-1] != '\n'); p[i-1] = 0; /* terminate at newline */ #ifndef PASSWD_FROM_STDIN close(f); #endif return p; /* return pointer to password */ } /* end function getp() */ #endif /* UNIX || __MINT__ || __BEOS__ */ #if (defined(VMS) || defined(CMS_MVS)) char *getp(__G__ m, p, n) __GDEF ZCONST char *m; /* prompt for password */ char *p; /* return value: line input */ int n; /* bytes available in p[] */ { char c; /* one-byte buffer for read() to use */ int i; /* number of characters input */ char *w; /* warning on retry */ FILE *f; /* file structure for SYS$COMMAND device */ #ifdef PASSWD_FROM_STDIN f = stdin; #else if ((f = fopen(ctermid(NULL), "r")) == NULL) return NULL; #endif /* get password */ fflush(stdout); w = ""; do { if (*w) /* bug: VMS apparently adds \n to NULL fputs */ fputs(w, stderr); /* warning if back again */ fputs(m, stderr); /* prompt */ fflush(stderr); i = 0; echoff(f); do { /* read line, keeping n */ if ((c = (char)getc(f)) == '\r') c = '\n'; if (i < n) p[i++] = c; } while (c != '\n'); echon(); PUTC('\n', stderr); fflush(stderr); w = "(line too long--try again)\n"; } while (p[i-1] != '\n'); p[i-1] = 0; /* terminate at newline */ #ifndef PASSWD_FROM_STDIN fclose(f); #endif return p; /* return pointer to password */ } /* end function getp() */ #endif /* VMS || CMS_MVS */ #endif /* ?HAVE_WORKING_GETCH */ #endif /* CRYPT */ #endif /* CRYPT || (UNZIP && !FUNZIP) */