ncurses/tinfo/lib_ttyflags.c

   1 /****************************************************************************
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  11  *                                                                          *
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  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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  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 1.18 2008/08/03 22:10:44 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 ? cur_term->Filedes : -1,
  69                         _nc_trace_ttymode(buf)));
  70     }
  71     return (result);
  72 }
  73
  74 NCURSES_EXPORT(int)
  75 _nc_set_tty_mode(TTY * buf)
  76 {
  77     int result = OK;
  78
  79     if (buf == 0) {
  80         result = ERR;
  81     } else {
  82         if (cur_term == 0) {
  83             result = ERR;
  84         } else {
  85             for (;;) {
  86                 if (SET_TTY(cur_term->Filedes, buf) != 0) {
  87                     if (errno == EINTR)
  88                         continue;
  89                     if ((errno == ENOTTY) && (SP != 0))
  90                         SP->_notty = TRUE;
  91                     result = ERR;
  92                 }
  93                 break;
  94             }
  95         }
  96         TR(TRACE_BITS, ("_nc_set_tty_mode(%d): %s",
  97                         cur_term ? cur_term->Filedes : -1,
  98                         _nc_trace_ttymode(buf)));
  99     }
 100     return (result);
 101 }
 102
 103 NCURSES_EXPORT(int)
 104 def_shell_mode(void)
 105 {
 106     int rc = ERR;
 107
 108     T((T_CALLED("def_shell_mode()")));
 109
 110     if (cur_term != 0) {
 111         /*
 112          * If XTABS was on, remove the tab and backtab capabilities.
 113          */
 114         if (_nc_get_tty_mode(&cur_term->Ottyb) == OK) {
 115 #ifdef TERMIOS
 116             if (cur_term->Ottyb.c_oflag & OFLAGS_TABS)
 117                 tab = back_tab = NULL;
 118 #else
 119             if (cur_term->Ottyb.sg_flags & XTABS)
 120                 tab = back_tab = NULL;
 121 #endif
 122             rc = OK;
 123         }
 124     }
 125     returnCode(rc);
 126 }
 127
 128 NCURSES_EXPORT(int)
 129 def_prog_mode(void)
 130 {
 131     int rc = ERR;
 132
 133     T((T_CALLED("def_prog_mode()")));
 134
 135     if (cur_term != 0) {
 136         /*
 137          * Turn off the XTABS bit in the tty structure if it was on.
 138          */
 139         if (_nc_get_tty_mode(&cur_term->Nttyb) == OK) {
 140 #ifdef TERMIOS
 141             cur_term->Nttyb.c_oflag &= ~OFLAGS_TABS;
 142 #else
 143             cur_term->Nttyb.sg_flags &= ~XTABS;
 144 #endif
 145             rc = OK;
 146         }
 147     }
 148     returnCode(rc);
 149 }
 150
 151 NCURSES_EXPORT(int)
 152 reset_prog_mode(void)
 153 {
 154     T((T_CALLED("reset_prog_mode()")));
 155
 156     if (cur_term != 0) {
 157         if (_nc_set_tty_mode(&cur_term->Nttyb) == OK) {
 158             if (SP) {
 159                 if (SP->_keypad_on)
 160                     _nc_keypad(SP, TRUE);
 161                 NC_BUFFERED(TRUE);
 162             }
 163             returnCode(OK);
 164         }
 165     }
 166     returnCode(ERR);
 167 }
 168
 169 NCURSES_EXPORT(int)
 170 reset_shell_mode(void)
 171 {
 172     T((T_CALLED("reset_shell_mode()")));
 173
 174     if (cur_term != 0) {
 175         if (SP) {
 176             _nc_keypad(SP, FALSE);
 177             _nc_flush();
 178             NC_BUFFERED(FALSE);
 179         }
 180         returnCode(_nc_set_tty_mode(&cur_term->Ottyb));
 181     }
 182     returnCode(ERR);
 183 }
 184
 185 static TTY *
 186 saved_tty(void)
 187 {
 188     TTY *result = 0;
 189
 190     if (SP != 0) {
 191         result = &(SP->_saved_tty);
 192     } else {
 193         if (_nc_prescreen.saved_tty == 0) {
 194             _nc_prescreen.saved_tty = typeCalloc(TTY, 1);
 195         }
 196         result = _nc_prescreen.saved_tty;
 197     }
 198     return result;
 199 }
 200
 201 /*
 202 **      savetty()  and  resetty()
 203 **
 204 */
 205
 206 NCURSES_EXPORT(int)
 207 savetty(void)
 208 {
 209     T((T_CALLED("savetty()")));
 210
 211     returnCode(_nc_get_tty_mode(saved_tty()));
 212 }
 213
 214 NCURSES_EXPORT(int)
 215 resetty(void)
 216 {
 217     T((T_CALLED("resetty()")));
 218
 219     returnCode(_nc_set_tty_mode(saved_tty()));
 220 }