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Initial revision

    1: /*
    2:  * Copyright (c) 2011 Todd C. Miller <Todd.Miller@courtesan.com>
    3:  *
    4:  * Permission to use, copy, modify, and distribute this software for any
    5:  * purpose with or without fee is hereby granted, provided that the above
    6:  * copyright notice and this permission notice appear in all copies.
    7:  *
    8:  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
    9:  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
   10:  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
   11:  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
   12:  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
   13:  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
   14:  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
   15:  */
   16: 
   17: #include <config.h>
   18: 
   19: #include <sys/types.h>
   20: #include <sys/param.h>
   21: #include <stdio.h>
   22: #ifdef STDC_HEADERS
   23: # include <stdlib.h>
   24: # include <stddef.h>
   25: #else
   26: # ifdef HAVE_STDLIB_H
   27: #  include <stdlib.h>
   28: # endif
   29: #endif /* STDC_HEADERS */
   30: #ifdef HAVE_STRING_H
   31: # if defined(HAVE_MEMORY_H) && !defined(STDC_HEADERS)
   32: #  include <memory.h>
   33: # endif
   34: # include <string.h>
   35: #endif /* HAVE_STRING_H */
   36: #ifdef HAVE_STRINGS_H
   37: # include <strings.h>
   38: #endif /* HAVE_STRINGS_H */
   39: #include <termios.h>
   40: 
   41: #include "missing.h"
   42: 
   43: #ifndef TCSASOFT
   44: # define TCSASOFT	0
   45: #endif
   46: #ifndef ECHONL
   47: # define ECHONL		0
   48: #endif
   49: #ifndef IEXTEN
   50: # define IEXTEN		0
   51: #endif
   52: #ifndef IUCLC
   53: # define IUCLC		0
   54: #endif
   55: 
   56: #ifndef _POSIX_VDISABLE
   57: # ifdef VDISABLE
   58: #  define _POSIX_VDISABLE	VDISABLE
   59: # else
   60: #  define _POSIX_VDISABLE	0
   61: # endif
   62: #endif
   63: 
   64: static struct termios term, oterm;
   65: static int changed;
   66: int term_erase;
   67: int term_kill;
   68: 
   69: int
   70: term_restore(int fd, int flush)
   71: {
   72:     if (changed) {
   73: 	int flags = TCSASOFT;
   74: 	flags |= flush ? TCSAFLUSH : TCSADRAIN;
   75: 	if (tcsetattr(fd, flags, &oterm) != 0)
   76: 	    return 0;
   77: 	changed = 0;
   78:     }
   79:     return 1;
   80: }
   81: 
   82: int
   83: term_noecho(int fd)
   84: {
   85:     if (!changed && tcgetattr(fd, &oterm) != 0)
   86: 	return 0;
   87:     (void) memcpy(&term, &oterm, sizeof(term));
   88:     CLR(term.c_lflag, ECHO|ECHONL);
   89: #ifdef VSTATUS
   90:     term.c_cc[VSTATUS] = _POSIX_VDISABLE;
   91: #endif
   92:     if (tcsetattr(fd, TCSADRAIN|TCSASOFT, &term) == 0) {
   93: 	changed = 1;
   94: 	return 1;
   95:     }
   96:     return 0;
   97: }
   98: 
   99: int
  100: term_raw(int fd, int isig)
  101: {
  102:     struct termios term;
  103: 
  104:     if (!changed && tcgetattr(fd, &oterm) != 0)
  105: 	return 0;
  106:     (void) memcpy(&term, &oterm, sizeof(term));
  107:     /* Set terminal to raw mode */
  108:     term.c_cc[VMIN] = 1;
  109:     term.c_cc[VTIME] = 0;
  110:     CLR(term.c_iflag, ICRNL | IGNCR | INLCR | IUCLC | IXON);
  111:     CLR(term.c_oflag, OPOST);
  112:     CLR(term.c_lflag, ECHO | ICANON | ISIG | IEXTEN);
  113:     if (isig)
  114: 	SET(term.c_lflag, ISIG);
  115:     if (tcsetattr(fd, TCSADRAIN|TCSASOFT, &term) == 0) {
  116: 	changed = 1;
  117:     	return 1;
  118:     }
  119:     return 0;
  120: }
  121: 
  122: int
  123: term_cbreak(int fd)
  124: {
  125:     if (!changed && tcgetattr(fd, &oterm) != 0)
  126: 	return 0;
  127:     (void) memcpy(&term, &oterm, sizeof(term));
  128:     /* Set terminal to half-cooked mode */
  129:     term.c_cc[VMIN] = 1;
  130:     term.c_cc[VTIME] = 0;
  131:     CLR(term.c_lflag, ECHO | ECHONL | ICANON | IEXTEN);
  132:     SET(term.c_lflag, ISIG);
  133: #ifdef VSTATUS
  134:     term.c_cc[VSTATUS] = _POSIX_VDISABLE;
  135: #endif
  136:     if (tcsetattr(fd, TCSADRAIN|TCSASOFT, &term) == 0) {
  137: 	term_erase = term.c_cc[VERASE];
  138: 	term_kill = term.c_cc[VKILL];
  139: 	changed = 1;
  140: 	return 1;
  141:     }
  142:     return 0;
  143: }
  144: 
  145: int
  146: term_copy(int src, int dst)
  147: {
  148:     struct termios tt;
  149: 
  150:     if (tcgetattr(src, &tt) != 0)
  151: 	return 0;
  152:     if (tcsetattr(dst, TCSANOW|TCSASOFT, &tt) != 0)
  153: 	return 0;
  154:     return 1;
  155: }