diff options
Diffstat (limited to 'gnu/lib/libreadline/signals.c')
| -rw-r--r-- | gnu/lib/libreadline/signals.c | 287 |
1 files changed, 0 insertions, 287 deletions
diff --git a/gnu/lib/libreadline/signals.c b/gnu/lib/libreadline/signals.c deleted file mode 100644 index e3d93a0..0000000 --- a/gnu/lib/libreadline/signals.c +++ /dev/null @@ -1,287 +0,0 @@ -/* signals.c -- signal handling support for readline. */ - -/* Copyright (C) 1987, 1989, 1992 Free Software Foundation, Inc. - - This file is part of the GNU Readline Library, a library for - reading lines of text with interactive input and history editing. - - The GNU Readline Library is free software; you can redistribute it - and/or modify it under the terms of the GNU General Public License - as published by the Free Software Foundation; either version 1, or - (at your option) any later version. - - The GNU Readline Library is distributed in the hope that it will be - useful, but WITHOUT ANY WARRANTY; without even the implied warranty - of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - GNU General Public License for more details. - - The GNU General Public License is often shipped with GNU software, and - is generally kept in a file called COPYING or LICENSE. If you do not - have a copy of the license, write to the Free Software Foundation, - 675 Mass Ave, Cambridge, MA 02139, USA. */ -#define READLINE_LIBRARY - -#include <stdio.h> -#include <sys/types.h> -#include <fcntl.h> -#if !defined (NO_SYS_FILE) -# include <sys/file.h> -#endif /* !NO_SYS_FILE */ -#include <signal.h> - -#if defined (HAVE_UNISTD_H) -# include <unistd.h> -#endif /* HAVE_UNISTD_H */ - -#if defined (HAVE_STDLIB_H) -# include <stdlib.h> -#else -# include "ansi_stdlib.h" -#endif /* HAVE_STDLIB_H */ - -#include <errno.h> -/* Not all systems declare ERRNO in errno.h... and some systems #define it! */ -#if !defined (errno) -extern int errno; -#endif /* !errno */ - -#include "posixstat.h" - -/* System-specific feature definitions and include files. */ -#include "rldefs.h" - -#if defined (GWINSZ_IN_SYS_IOCTL) -# include <sys/ioctl.h> -#endif /* GWINSZ_IN_SYS_IOCTL */ - -/* Some standard library routines. */ -#include "readline.h" -#include "history.h" - -extern int readline_echoing_p; -extern int rl_pending_input; -extern int _rl_meta_flag; - -extern void free_undo_list (); - -#if defined (VOID_SIGHANDLER) -# define sighandler void -#else -# define sighandler int -#endif /* VOID_SIGHANDLER */ - -/* This typedef is equivalant to the one for Function; it allows us - to say SigHandler *foo = signal (SIGKILL, SIG_IGN); */ -typedef sighandler SigHandler (); - -#if defined (__GO32__) -# undef HANDLE_SIGNALS -#endif /* __GO32__ */ - -#if defined (STATIC_MALLOC) -static char *xmalloc (), *xrealloc (); -#else -extern char *xmalloc (), *xrealloc (); -#endif /* STATIC_MALLOC */ - - -/* **************************************************************** */ -/* */ -/* Signal Handling */ -/* */ -/* **************************************************************** */ - -#if defined (SIGWINCH) -static SigHandler *old_sigwinch = (SigHandler *)NULL; - -static sighandler -rl_handle_sigwinch (sig) - int sig; -{ - if (readline_echoing_p) - { - _rl_set_screen_size (fileno (rl_instream), 1); - _rl_redisplay_after_sigwinch (); - } - - if (old_sigwinch && - old_sigwinch != (SigHandler *)SIG_IGN && - old_sigwinch != (SigHandler *)SIG_DFL) - (*old_sigwinch) (sig); -#if !defined (VOID_SIGHANDLER) - return (0); -#endif /* VOID_SIGHANDLER */ -} -#endif /* SIGWINCH */ - -#if defined (HANDLE_SIGNALS) -/* Interrupt handling. */ -static SigHandler - *old_int = (SigHandler *)NULL, - *old_alrm = (SigHandler *)NULL; -#if !defined (SHELL) -static SigHandler - *old_tstp = (SigHandler *)NULL, - *old_ttou = (SigHandler *)NULL, - *old_ttin = (SigHandler *)NULL, - *old_cont = (SigHandler *)NULL; -#endif /* !SHELL */ - -/* Handle an interrupt character. */ -static sighandler -rl_signal_handler (sig) - int sig; -{ -#if defined (HAVE_POSIX_SIGNALS) - sigset_t set; -#else /* !HAVE_POSIX_SIGNALS */ -# if defined (HAVE_BSD_SIGNALS) - long omask; -# endif /* HAVE_BSD_SIGNALS */ -#endif /* !HAVE_POSIX_SIGNALS */ - -#if !defined (HAVE_BSD_SIGNALS) && !defined (HAVE_POSIX_SIGNALS) - /* Since the signal will not be blocked while we are in the signal - handler, ignore it until rl_clear_signals resets the catcher. */ - if (sig == SIGINT) - signal (sig, SIG_IGN); -#endif /* !HAVE_BSD_SIGNALS */ - - switch (sig) - { - case SIGINT: - { - register HIST_ENTRY *entry; - - free_undo_list (); - - entry = current_history (); - if (entry) - entry->data = (char *)NULL; - } - _rl_kill_kbd_macro (); - rl_clear_message (); - rl_init_argument (); - -#if defined (SIGTSTP) - case SIGTSTP: - case SIGTTOU: - case SIGTTIN: -#endif /* SIGTSTP */ - case SIGALRM: - rl_clean_up_for_exit (); - rl_deprep_terminal (); - rl_clear_signals (); - rl_pending_input = 0; - -#if defined (HAVE_POSIX_SIGNALS) - sigprocmask (SIG_BLOCK, (sigset_t *)NULL, &set); - sigdelset (&set, sig); -#else /* !HAVE_POSIX_SIGNALS */ -# if defined (HAVE_BSD_SIGNALS) - omask = sigblock (0); -# endif /* HAVE_BSD_SIGNALS */ -#endif /* !HAVE_POSIX_SIGNALS */ - - kill (getpid (), sig); - - /* Let the signal that we just sent through. */ -#if defined (HAVE_POSIX_SIGNALS) - sigprocmask (SIG_SETMASK, &set, (sigset_t *)NULL); -#else /* !HAVE_POSIX_SIGNALS */ -# if defined (HAVE_BSD_SIGNALS) - sigsetmask (omask & ~(sigmask (sig))); -# endif /* HAVE_BSD_SIGNALS */ -#endif /* !HAVE_POSIX_SIGNALS */ - - rl_prep_terminal (_rl_meta_flag); - rl_set_signals (); - } - -#if !defined (VOID_SIGHANDLER) - return (0); -#endif /* !VOID_SIGHANDLER */ -} - -#if defined (HAVE_POSIX_SIGNALS) -static SigHandler * -rl_set_sighandler (sig, handler) - int sig; - SigHandler *handler; -{ - struct sigaction act, oact; - - act.sa_handler = handler; - act.sa_flags = 0; - sigemptyset (&act.sa_mask); - sigemptyset (&oact.sa_mask); - sigaction (sig, &act, &oact); - return (oact.sa_handler); -} - -#else /* !HAVE_POSIX_SIGNALS */ -# define rl_set_sighandler(sig, handler) (SigHandler *)signal (sig, handler) -#endif /* !HAVE_POSIX_SIGNALS */ - -rl_set_signals () -{ - old_int = (SigHandler *)rl_set_sighandler (SIGINT, rl_signal_handler); - if (old_int == (SigHandler *)SIG_IGN) - rl_set_sighandler (SIGINT, SIG_IGN); - - old_alrm = (SigHandler *)rl_set_sighandler (SIGALRM, rl_signal_handler); - if (old_alrm == (SigHandler *)SIG_IGN) - rl_set_sighandler (SIGALRM, SIG_IGN); - -#if !defined (SHELL) - -#if defined (SIGTSTP) - old_tstp = (SigHandler *)rl_set_sighandler (SIGTSTP, rl_signal_handler); - if (old_tstp == (SigHandler *)SIG_IGN) - rl_set_sighandler (SIGTSTP, SIG_IGN); -#endif /* SIGTSTP */ -#if defined (SIGTTOU) - old_ttou = (SigHandler *)rl_set_sighandler (SIGTTOU, rl_signal_handler); - old_ttin = (SigHandler *)rl_set_sighandler (SIGTTIN, rl_signal_handler); - - if (old_tstp == (SigHandler *)SIG_IGN) - { - rl_set_sighandler (SIGTTOU, SIG_IGN); - rl_set_sighandler (SIGTTIN, SIG_IGN); - } -#endif /* SIGTTOU */ - -#endif /* !SHELL */ - -#if defined (SIGWINCH) - old_sigwinch = - (SigHandler *) rl_set_sighandler (SIGWINCH, rl_handle_sigwinch); -#endif /* SIGWINCH */ - return 0; -} - -rl_clear_signals () -{ - rl_set_sighandler (SIGINT, old_int); - rl_set_sighandler (SIGALRM, old_alrm); - -#if !defined (SHELL) - -#if defined (SIGTSTP) - rl_set_sighandler (SIGTSTP, old_tstp); -#endif - -#if defined (SIGTTOU) - rl_set_sighandler (SIGTTOU, old_ttou); - rl_set_sighandler (SIGTTIN, old_ttin); -#endif /* SIGTTOU */ - -#endif /* !SHELL */ - -#if defined (SIGWINCH) - rl_set_sighandler (SIGWINCH, old_sigwinch); -#endif - - return 0; -} -#endif /* HANDLE_SIGNALS */ |
