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authorElena Zannoni <ezannoni@kwikemart.cygnus.com>2000-07-09 16:21:20 +0000
committerElena Zannoni <ezannoni@kwikemart.cygnus.com>2000-07-09 16:21:20 +0000
commit15313ba908c1d6718a7ac51fbc3180d4c2ea066f (patch)
treec2d744e149d51d272b07b972cc713ce6f2f572a7 /readline/signals.c
parent3722a119d4898b72203a19b360c634ce9026bfd5 (diff)
downloadgdb-readline_4_1.tar.gz
Import of readline 4.1readline_4_1
Diffstat (limited to 'readline/signals.c')
-rw-r--r--readline/signals.c54
1 files changed, 26 insertions, 28 deletions
diff --git a/readline/signals.c b/readline/signals.c
index 3a34432f143..861019d3363 100644
--- a/readline/signals.c
+++ b/readline/signals.c
@@ -7,7 +7,7 @@
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
+ as published by the Free Software Foundation; either version 2, or
(at your option) any later version.
The GNU Readline Library is distributed in the hope that it will be
@@ -18,7 +18,7 @@
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. */
+ 59 Temple Place, Suite 330, Boston, MA 02111 USA. */
#define READLINE_LIBRARY
#if defined (HAVE_CONFIG_H)
@@ -40,15 +40,13 @@
# include <sys/ioctl.h>
#endif /* GWINSZ_IN_SYS_IOCTL */
-#if defined (__GO32__)
-# undef HANDLE_SIGNALS
-#endif /* __GO32__ */
-
#if defined (HANDLE_SIGNALS)
/* Some standard library routines. */
#include "readline.h"
#include "history.h"
+#include "rlprivate.h"
+
#if !defined (RETSIGTYPE)
# if defined (VOID_SIGHANDLER)
# define RETSIGTYPE void
@@ -67,19 +65,15 @@
to say SigHandler *foo = signal (SIGKILL, SIG_IGN); */
typedef RETSIGTYPE SigHandler ();
-extern int readline_echoing_p;
-extern int rl_pending_input;
-extern int _rl_meta_flag;
-
-extern void free_undo_list ();
-extern void _rl_get_screen_size ();
-extern void _rl_redisplay_after_sigwinch ();
-extern void _rl_clean_up_for_exit ();
-extern void _rl_kill_kbd_macro ();
-extern void _rl_init_argument ();
-extern void rl_deprep_terminal (), rl_prep_terminal ();
+#if defined (HAVE_POSIX_SIGNALS)
+typedef struct sigaction sighandler_cxt;
+# define rl_sigaction(s, nh, oh) sigaction(s, nh, oh)
+#else
+typedef struct { SigHandler *sa_handler; int sa_mask, sa_flags; } sighandler_cxt;
+# define sigemptyset(m)
+#endif /* !HAVE_POSIX_SIGNALS */
-static SigHandler *rl_set_sighandler ();
+static SigHandler *rl_set_sighandler __P((int, SigHandler *, sighandler_cxt *));
/* Exported variables for use by applications. */
@@ -101,14 +95,6 @@ static int sigwinch_set_flag;
/* */
/* **************************************************************** */
-#if defined (HAVE_POSIX_SIGNALS)
-typedef struct sigaction sighandler_cxt;
-# define rl_sigaction(s, nh, oh) sigaction(s, nh, oh)
-#else
-typedef struct { SigHandler *sa_handler; int sa_mask, sa_flags; } sighandler_cxt;
-# define sigemptyset(m)
-#endif /* !HAVE_POSIX_SIGNALS */
-
static sighandler_cxt old_int, old_term, old_alrm, old_quit;
#if defined (SIGTSTP)
static sighandler_cxt old_tstp, old_ttou, old_ttin;
@@ -165,6 +151,10 @@ rl_signal_handler (sig)
# endif /* HAVE_BSD_SIGNALS */
#endif /* !HAVE_POSIX_SIGNALS */
+#if defined (__EMX__)
+ signal (sig, SIG_ACK);
+#endif
+
kill (getpid (), sig);
/* Let the signal that we just sent through. */
@@ -232,6 +222,7 @@ rl_set_sighandler (sig, handler, ohandler)
SigHandler *handler;
sighandler_cxt *ohandler;
{
+ sighandler_cxt old_handler;
#if defined (HAVE_POSIX_SIGNALS)
struct sigaction act;
@@ -239,10 +230,17 @@ rl_set_sighandler (sig, handler, ohandler)
act.sa_flags = 0;
sigemptyset (&act.sa_mask);
sigemptyset (&ohandler->sa_mask);
- sigaction (sig, &act, ohandler);
+ sigaction (sig, &act, &old_handler);
#else
- ohandler->sa_handler = (SigHandler *)signal (sig, handler);
+ old_handler.sa_handler = (SigHandler *)signal (sig, handler);
#endif /* !HAVE_POSIX_SIGNALS */
+
+ /* XXX -- assume we have memcpy */
+ /* If rl_set_signals is called twice in a row, don't set the old handler to
+ rl_signal_handler, because that would cause infinite recursion. */
+ if (handler != rl_signal_handler || old_handler.sa_handler != rl_signal_handler)
+ memcpy (ohandler, &old_handler, sizeof (sighandler_cxt));
+
return (ohandler->sa_handler);
}