ncurses/tinfo/lib_ttyflags.c

   1 /****************************************************************************
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   3  *                                                                          *
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   6  * "Software"), to deal in the Software without restriction, including      *
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  10  * furnished to do so, subject to the following conditions:                 *
  11  *                                                                          *
  12  * The above copyright notice and this permission notice shall be included  *
  13  * in all copies or substantial portions of the Software.                   *
  14  *                                                                          *
  15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS  *
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  24  * holders shall not be used in advertising or otherwise to promote the     *
  25  * sale, use or other dealings in this Software without prior written       *
  26  * authorization.                                                           *
  27  ****************************************************************************/
  28
  29 /*
  30  *              def_prog_mode()
  31  *              def_shell_mode()
  32  *              reset_prog_mode()
  33  *              reset_shell_mode()
  34  *              savetty()
  35  *              resetty()
  36  */
  37
  38 #include <curses.priv.h>
  39 #include <term.h>               /* cur_term */
  40
  41 MODULE_ID("$Id: lib_ttyflags.c,v 1.15 2007/05/26 18:54:25 tom Exp $")
  42
  43 NCURSES_EXPORT(int)
  44 _nc_get_tty_mode(TTY * buf)
  45 {
  46     int result = OK;
  47
  48     if (buf == 0) {
  49         result = ERR;
  50     } else {
  51         if (cur_term == 0) {
  52             result = ERR;
  53         } else {
  54             for (;;) {
  55                 if (GET_TTY(cur_term->Filedes, buf) != 0) {
  56                     if (errno == EINTR)
  57                         continue;
  58                     result = ERR;
  59                 }
  60                 break;
  61             }
  62         }
  63
  64         if (result == ERR)
  65             memset(buf, 0, sizeof(*buf));
  66
  67         TR(TRACE_BITS, ("_nc_get_tty_mode(%d): %s",
  68                         cur_term->Filedes, _nc_trace_ttymode(buf)));
  69     }
  70     return (result);
  71 }
  72
  73 NCURSES_EXPORT(int)
  74 _nc_set_tty_mode(TTY * buf)
  75 {
  76     int result = OK;
  77
  78     if (buf == 0) {
  79         result = ERR;
  80     } else {
  81         if (cur_term == 0) {
  82             result = ERR;
  83         } else {
  84             for (;;) {
  85                 if (SET_TTY(cur_term->Filedes, buf) != 0) {
  86                     if (errno == EINTR)
  87                         continue;
  88                     if ((errno == ENOTTY) && (SP != 0))
  89                         SP->_notty = TRUE;
  90                     result = ERR;
  91                 }
  92                 break;
  93             }
  94         }
  95         TR(TRACE_BITS, ("_nc_set_tty_mode(%d): %s",
  96                         cur_term->Filedes, _nc_trace_ttymode(buf)));
  97     }
  98     return (result);
  99 }
 100
 101 NCURSES_EXPORT(int)
 102 def_shell_mode(void)
 103 {
 104     T((T_CALLED("def_shell_mode()")));
 105
 106     /*
 107      * If XTABS was on, remove the tab and backtab capabilities.
 108      */
 109
 110     if (_nc_get_tty_mode(&cur_term->Ottyb) != OK)
 111         returnCode(ERR);
 112 #ifdef TERMIOS
 113     if (cur_term->Ottyb.c_oflag & OFLAGS_TABS)
 114         tab = back_tab = NULL;
 115 #else
 116     if (cur_term->Ottyb.sg_flags & XTABS)
 117         tab = back_tab = NULL;
 118 #endif
 119     returnCode(OK);
 120 }
 121
 122 NCURSES_EXPORT(int)
 123 def_prog_mode(void)
 124 {
 125     T((T_CALLED("def_prog_mode()")));
 126
 127     /*
 128      * Turn off the XTABS bit in the tty structure if it was on.
 129      */
 130
 131     if (_nc_get_tty_mode(&cur_term->Nttyb) != OK)
 132         returnCode(ERR);
 133 #ifdef TERMIOS
 134     cur_term->Nttyb.c_oflag &= ~OFLAGS_TABS;
 135 #else
 136     cur_term->Nttyb.sg_flags &= ~XTABS;
 137 #endif
 138     returnCode(OK);
 139 }
 140
 141 NCURSES_EXPORT(int)
 142 reset_prog_mode(void)
 143 {
 144     T((T_CALLED("reset_prog_mode()")));
 145
 146     if (cur_term != 0) {
 147         if (_nc_set_tty_mode(&cur_term->Nttyb) == OK) {
 148             if (SP) {
 149                 if (SP->_keypad_on)
 150                     _nc_keypad(TRUE);
 151                 NC_BUFFERED(TRUE);
 152             }
 153             returnCode(OK);
 154         }
 155     }
 156     returnCode(ERR);
 157 }
 158
 159 NCURSES_EXPORT(int)
 160 reset_shell_mode(void)
 161 {
 162     T((T_CALLED("reset_shell_mode()")));
 163
 164     if (cur_term != 0) {
 165         if (SP) {
 166             _nc_keypad(FALSE);
 167             _nc_flush();
 168             NC_BUFFERED(FALSE);
 169         }
 170         returnCode(_nc_set_tty_mode(&cur_term->Ottyb));
 171     }
 172     returnCode(ERR);
 173 }
 174
 175 static TTY *
 176 saved_tty(void)
 177 {
 178     TTY *result = 0;
 179
 180     if (SP != 0) {
 181         result = &(SP->_saved_tty);
 182     } else {
 183         if (_nc_prescreen.saved_tty == 0) {
 184             _nc_prescreen.saved_tty = typeCalloc(TTY, 1);
 185         }
 186         result = _nc_prescreen.saved_tty;
 187     }
 188     return result;
 189 }
 190
 191 /*
 192 **      savetty()  and  resetty()
 193 **
 194 */
 195
 196 NCURSES_EXPORT(int)
 197 savetty(void)
 198 {
 199     T((T_CALLED("savetty()")));
 200
 201     returnCode(_nc_get_tty_mode(saved_tty()));
 202 }
 203
 204 NCURSES_EXPORT(int)
 205 resetty(void)
 206 {
 207     T((T_CALLED("resetty()")));
 208
 209     returnCode(_nc_set_tty_mode(saved_tty()));
 210 }