diff options
Diffstat (limited to 'signals.c')
| -rw-r--r-- | signals.c | 54 |
1 files changed, 26 insertions, 28 deletions
@@ -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); } |