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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  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 1.17 2008/06/21 20:53:06 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     int rc = ERR;
 105
 106     T((T_CALLED("def_shell_mode()")));
 107
 108     if (cur_term != 0) {
 109         /*
 110          * If XTABS was on, remove the tab and backtab capabilities.
 111          */
 112         if (_nc_get_tty_mode(&cur_term->Ottyb) == OK) {
 113 #ifdef TERMIOS
 114             if (cur_term->Ottyb.c_oflag & OFLAGS_TABS)
 115                 tab = back_tab = NULL;
 116 #else
 117             if (cur_term->Ottyb.sg_flags & XTABS)
 118                 tab = back_tab = NULL;
 119 #endif
 120             rc = OK;
 121         }
 122     }
 123     returnCode(rc);
 124 }
 125
 126 NCURSES_EXPORT(int)
 127 def_prog_mode(void)
 128 {
 129     int rc = ERR;
 130
 131     T((T_CALLED("def_prog_mode()")));
 132
 133     if (cur_term != 0) {
 134         /*
 135          * Turn off the XTABS bit in the tty structure if it was on.
 136          */
 137         if (_nc_get_tty_mode(&cur_term->Nttyb) == OK) {
 138 #ifdef TERMIOS
 139             cur_term->Nttyb.c_oflag &= ~OFLAGS_TABS;
 140 #else
 141             cur_term->Nttyb.sg_flags &= ~XTABS;
 142 #endif
 143             rc = OK;
 144         }
 145     }
 146     returnCode(rc);
 147 }
 148
 149 NCURSES_EXPORT(int)
 150 reset_prog_mode(void)
 151 {
 152     T((T_CALLED("reset_prog_mode()")));
 153
 154     if (cur_term != 0) {
 155         if (_nc_set_tty_mode(&cur_term->Nttyb) == OK) {
 156             if (SP) {
 157                 if (SP->_keypad_on)
 158                     _nc_keypad(SP, TRUE);
 159                 NC_BUFFERED(TRUE);
 160             }
 161             returnCode(OK);
 162         }
 163     }
 164     returnCode(ERR);
 165 }
 166
 167 NCURSES_EXPORT(int)
 168 reset_shell_mode(void)
 169 {
 170     T((T_CALLED("reset_shell_mode()")));
 171
 172     if (cur_term != 0) {
 173         if (SP) {
 174             _nc_keypad(SP, FALSE);
 175             _nc_flush();
 176             NC_BUFFERED(FALSE);
 177         }
 178         returnCode(_nc_set_tty_mode(&cur_term->Ottyb));
 179     }
 180     returnCode(ERR);
 181 }
 182
 183 static TTY *
 184 saved_tty(void)
 185 {
 186     TTY *result = 0;
 187
 188     if (SP != 0) {
 189         result = &(SP->_saved_tty);
 190     } else {
 191         if (_nc_prescreen.saved_tty == 0) {
 192             _nc_prescreen.saved_tty = typeCalloc(TTY, 1);
 193         }
 194         result = _nc_prescreen.saved_tty;
 195     }
 196     return result;
 197 }
 198
 199 /*
 200 **      savetty()  and  resetty()
 201 **
 202 */
 203
 204 NCURSES_EXPORT(int)
 205 savetty(void)
 206 {
 207     T((T_CALLED("savetty()")));
 208
 209     returnCode(_nc_get_tty_mode(saved_tty()));
 210 }
 211
 212 NCURSES_EXPORT(int)
 213 resetty(void)
 214 {
 215     T((T_CALLED("resetty()")));
 216
 217     returnCode(_nc_set_tty_mode(saved_tty()));
 218 }