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Imported from ../bash-4.0-rc1.tar.gz.

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This commit is contained in:
Jari Aalto 2009-01-12 13:36:28 +00:00
commit 3185942a52
666 changed files with 188710 additions and 54674 deletions
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147
lib/readline/signals.c
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@ -1,24 +1,24 @@
/* signals.c -- signal handling support for readline. */
/* Copyright (C) 1987-2005 Free Software Foundation, Inc.
/* Copyright (C) 1987-2009 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.
This file is part of the GNU Readline Library (Readline), 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 2, or
Readline 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 3 of the License, 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
Readline 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,
59 Temple Place, Suite 330, Boston, MA 02111 USA. */
You should have received a copy of the GNU General Public License
along with Readline. If not, see <http://www.gnu.org/licenses/>.
*/
#define READLINE_LIBRARY
#if defined (HAVE_CONFIG_H)
@ -40,13 +40,14 @@
# include <sys/ioctl.h>
#endif /* GWINSZ_IN_SYS_IOCTL */
#if defined (HANDLE_SIGNALS)
/* Some standard library routines. */
#include "readline.h"
#include "history.h"
#include "rlprivate.h"
#if defined (HANDLE_SIGNALS)
#if !defined (RETSIGTYPE)
# if defined (VOID_SIGHANDLER)
# define RETSIGTYPE void
@ -93,6 +94,14 @@ int rl_catch_sigwinch = 1;
int rl_catch_sigwinch = 0; /* for the readline state struct in readline.c */
#endif
/* Private variables. */
/* If non-zero, print characters corresponding to received signals. */
int _rl_echoctl = 0;
int _rl_intr_char = 0;
int _rl_quit_char = 0;
int _rl_susp_char = 0;
static int signals_set_flag;
static int sigwinch_set_flag;
@ -142,6 +151,7 @@ rl_signal_handler (sig)
switch (sig)
{
case SIGINT:
_rl_reset_completion_state ();
rl_free_line_state ();
/* FALLTHROUGH */
@ -157,6 +167,7 @@ rl_signal_handler (sig)
#if defined (SIGQUIT)
case SIGQUIT:
#endif
rl_echo_signal_char (sig);
rl_cleanup_after_signal ();
#if defined (HAVE_POSIX_SIGNALS)
@ -252,7 +263,11 @@ rl_set_sighandler (sig, handler, ohandler)
struct sigaction act;
act.sa_handler = handler;
# if defined (SIGWINCH)
act.sa_flags = (sig == SIGWINCH) ? SA_RESTART : 0;
# else
act.sa_flags = 0;
# endif /* SIGWINCH */
sigemptyset (&act.sa_mask);
sigemptyset (&ohandler->sa_mask);
sigaction (sig, &act, &old_handler);
@ -300,7 +315,7 @@ rl_set_signals ()
sigemptyset (&bset);
sigaddset (&bset, SIGINT);
sigaddset (&bset, SIGINT);
sigaddset (&bset, SIGTERM);
#if defined (SIGQUIT)
sigaddset (&bset, SIGQUIT);
#endif
@ -464,3 +479,105 @@ rl_free_line_state ()
}
#endif /* HANDLE_SIGNALS */
/* **************************************************************** */
/* */
/* SIGINT Management */
/* */
/* **************************************************************** */
#if defined (HAVE_POSIX_SIGNALS)
static sigset_t sigint_set, sigint_oset;
#else /* !HAVE_POSIX_SIGNALS */
# if defined (HAVE_BSD_SIGNALS)
static int sigint_oldmask;
# endif /* HAVE_BSD_SIGNALS */
#endif /* !HAVE_POSIX_SIGNALS */
static int sigint_blocked;
/* Cause SIGINT to not be delivered until the corresponding call to
release_sigint(). */
void
_rl_block_sigint ()
{
if (sigint_blocked)
return;
#if defined (HAVE_POSIX_SIGNALS)
sigemptyset (&sigint_set);
sigemptyset (&sigint_oset);
sigaddset (&sigint_set, SIGINT);
sigprocmask (SIG_BLOCK, &sigint_set, &sigint_oset);
#else /* !HAVE_POSIX_SIGNALS */
# if defined (HAVE_BSD_SIGNALS)
sigint_oldmask = sigblock (sigmask (SIGINT));
# else /* !HAVE_BSD_SIGNALS */
# if defined (HAVE_USG_SIGHOLD)
sighold (SIGINT);
# endif /* HAVE_USG_SIGHOLD */
# endif /* !HAVE_BSD_SIGNALS */
#endif /* !HAVE_POSIX_SIGNALS */
sigint_blocked = 1;
}
/* Allow SIGINT to be delivered. */
void
_rl_release_sigint ()
{
if (sigint_blocked == 0)
return;
#if defined (HAVE_POSIX_SIGNALS)
sigprocmask (SIG_SETMASK, &sigint_oset, (sigset_t *)NULL);
#else
# if defined (HAVE_BSD_SIGNALS)
sigsetmask (sigint_oldmask);
# else /* !HAVE_BSD_SIGNALS */
# if defined (HAVE_USG_SIGHOLD)
sigrelse (SIGINT);
# endif /* HAVE_USG_SIGHOLD */
# endif /* !HAVE_BSD_SIGNALS */
#endif /* !HAVE_POSIX_SIGNALS */
sigint_blocked = 0;
}
/* **************************************************************** */
/* */
/* Echoing special control characters */
/* */
/* **************************************************************** */
void
rl_echo_signal_char (sig)
int sig;
{
char cstr[3];
int cslen, c;
if (_rl_echoctl == 0)
return;
switch (sig)
{
case SIGINT: c = _rl_intr_char; break;
case SIGQUIT: c = _rl_quit_char; break;
case SIGTSTP: c = _rl_susp_char; break;
default: return;
}
if (CTRL_CHAR (c) || c == RUBOUT)
{
cstr[0] = '^';
cstr[1] = CTRL_CHAR (c) ? UNCTRL (c) : '?';
cstr[cslen = 2] = '\0';
}
else
{
cstr[0] = c;
cstr[cslen = 1] = '\0';
}
_rl_output_some_chars (cstr, cslen);
}