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79 lines
1.6 KiB
C
79 lines
1.6 KiB
C
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/* This work is copyrighted. See COPYRIGHT.OLD & COPYRIGHT.NEW for *
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* details. If they are missing then this copy is in violation of *
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* the copyright conditions. */
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/*
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** lib_tstp.c
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**
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** The routine tstp().
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**
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*/
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#include "curses.priv.h"
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#include "terminfo.h"
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#ifdef SVR4_ACTION
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#define _POSIX_SOURCE
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#endif
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#include <signal.h>
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void tstp(int dummy)
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{
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sigaction_t act, oact;
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sigset_t mask, omask;
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T(("tstp() called"));
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/*
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* The user may have changed the prog_mode tty bits, so save them.
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*/
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def_prog_mode();
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/*
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* Block window change and timer signals. The latter
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* is because applications use timers to decide when
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* to repaint the screen.
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*/
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(void)sigemptyset(&mask);
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(void)sigaddset(&mask, SIGALRM);
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#ifdef SIGWINCH
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(void)sigaddset(&mask, SIGWINCH);
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#endif
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(void)sigprocmask(SIG_BLOCK, &mask, &omask);
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endwin();
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sigemptyset(&mask);
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sigaddset(&mask, SIGTSTP);
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sigprocmask(SIG_UNBLOCK, &mask, NULL);
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act.sa_handler = SIG_DFL;
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sigemptyset(&act.sa_mask);
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act.sa_flags = 0;
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#ifdef SA_RESTART
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act.sa_flags |= SA_RESTART;
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#endif
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sigaction(SIGTSTP, &act, &oact);
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kill(getpid(), SIGTSTP);
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T(("SIGCONT received"));
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sigaction(SIGTSTP, &oact, NULL);
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flushinp();
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/*
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* If the user modified the tty state while suspended, he wants
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* those changes to stick. So save the new "default" terminal state.
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*/
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def_shell_mode();
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/*
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* This relies on the fact that doupdate() will restore the
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* program-mode tty state, and issue enter_ca_mode if need be.
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*/
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doupdate();
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/* Reset the signals. */
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(void)sigprocmask(SIG_SETMASK, &omask, NULL);
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}
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