diff options
Diffstat (limited to 'sysdeps/unix/sysv/linux/sigaction.c')
| -rw-r--r-- | sysdeps/unix/sysv/linux/sigaction.c | 99 |
1 files changed, 21 insertions, 78 deletions
diff --git a/sysdeps/unix/sysv/linux/sigaction.c b/sysdeps/unix/sysv/linux/sigaction.c index 37f7a2c149..01fb16e557 100644 --- a/sysdeps/unix/sysv/linux/sigaction.c +++ b/sysdeps/unix/sysv/linux/sigaction.c @@ -1,4 +1,4 @@ -/* Copyright (C) 1997-2000,2002,2003,2005,2006 Free Software Foundation, Inc. +/* Copyright (C) 1997-2012 Free Software Foundation, Inc. This file is part of the GNU C Library. The GNU C Library is free software; you can redistribute it and/or @@ -29,12 +29,6 @@ translate it here. */ #include <kernel_sigaction.h> -#if __ASSUME_REALTIME_SIGNALS == 0 -/* The variable is shared between all wrappers around signal handling - functions which have RT equivalents. This is the definition. */ -int __libc_missing_rt_sigs; -#endif - /* If ACT is not NULL, change the action for SIG to *ACT. If OACT is not NULL, put the old action for SIG in *OACT. */ @@ -44,87 +38,36 @@ __libc_sigaction (sig, act, oact) const struct sigaction *act; struct sigaction *oact; { -#if __ASSUME_REALTIME_SIGNALS == 0 - struct old_kernel_sigaction k_sigact, k_osigact; -#endif int result; -#if defined __NR_rt_sigaction || __ASSUME_REALTIME_SIGNALS > 0 - /* First try the RT signals. */ -# if __ASSUME_REALTIME_SIGNALS == 0 - if (!__libc_missing_rt_sigs) -# endif - { - struct kernel_sigaction kact, koact; - /* Save the current error value for later. We need not do this - if we are guaranteed to have realtime signals. */ -# if __ASSUME_REALTIME_SIGNALS == 0 - int saved_errno = errno; -# endif - - if (act) - { - kact.k_sa_handler = act->sa_handler; - memcpy (&kact.sa_mask, &act->sa_mask, sizeof (sigset_t)); - kact.sa_flags = act->sa_flags; -# ifdef HAVE_SA_RESTORER - kact.sa_restorer = act->sa_restorer; -# endif - } - - /* XXX The size argument hopefully will have to be changed to the - real size of the user-level sigset_t. */ - result = INLINE_SYSCALL (rt_sigaction, 4, sig, - act ? __ptrvalue (&kact) : NULL, - oact ? __ptrvalue (&koact) : NULL, _NSIG / 8); + struct kernel_sigaction kact, koact; -# if __ASSUME_REALTIME_SIGNALS == 0 - if (result >= 0 || errno != ENOSYS) -# endif - { - if (oact && result >= 0) - { - oact->sa_handler = koact.k_sa_handler; - memcpy (&oact->sa_mask, &koact.sa_mask, sizeof (sigset_t)); - oact->sa_flags = koact.sa_flags; -# ifdef HAVE_SA_RESTORER - oact->sa_restorer = koact.sa_restorer; -# endif - } - return result; - } - -# if __ASSUME_REALTIME_SIGNALS == 0 - __set_errno (saved_errno); - __libc_missing_rt_sigs = 1; -# endif - } -#endif - -#if __ASSUME_REALTIME_SIGNALS == 0 if (act) { - k_sigact.k_sa_handler = act->sa_handler; - k_sigact.sa_mask = act->sa_mask.__val[0]; - k_sigact.sa_flags = act->sa_flags; -# ifdef HAVE_SA_RESTORER - k_sigact.sa_restorer = act->sa_restorer; -# endif + kact.k_sa_handler = act->sa_handler; + memcpy (&kact.sa_mask, &act->sa_mask, sizeof (sigset_t)); + kact.sa_flags = act->sa_flags; +#ifdef HAVE_SA_RESTORER + kact.sa_restorer = act->sa_restorer; +#endif } - result = INLINE_SYSCALL (sigaction, 3, sig, - act ? __ptrvalue (&k_sigact) : NULL, - oact ? __ptrvalue (&k_osigact) : NULL); + + /* XXX The size argument hopefully will have to be changed to the + real size of the user-level sigset_t. */ + result = INLINE_SYSCALL (rt_sigaction, 4, sig, + act ? __ptrvalue (&kact) : NULL, + oact ? __ptrvalue (&koact) : NULL, _NSIG / 8); + if (oact && result >= 0) { - oact->sa_handler = k_osigact.k_sa_handler; - oact->sa_mask.__val[0] = k_osigact.sa_mask; - oact->sa_flags = k_osigact.sa_flags; -# ifdef HAVE_SA_RESTORER - oact->sa_restorer = k_osigact.sa_restorer; -# endif + oact->sa_handler = koact.k_sa_handler; + memcpy (&oact->sa_mask, &koact.sa_mask, sizeof (sigset_t)); + oact->sa_flags = koact.sa_flags; +#ifdef HAVE_SA_RESTORER + oact->sa_restorer = koact.sa_restorer; +#endif } return result; -#endif } libc_hidden_def (__libc_sigaction) |