diff options
Diffstat (limited to 'sysdeps/unix/sysv/linux/i386/sigaction.c')
| -rw-r--r-- | sysdeps/unix/sysv/linux/i386/sigaction.c | 19 |
1 files changed, 18 insertions, 1 deletions
diff --git a/sysdeps/unix/sysv/linux/i386/sigaction.c b/sysdeps/unix/sysv/linux/i386/sigaction.c index 142eac6a75..29f9fc5be8 100644 --- a/sysdeps/unix/sysv/linux/i386/sigaction.c +++ b/sysdeps/unix/sysv/linux/i386/sigaction.c @@ -1,5 +1,5 @@ /* POSIX.1 `sigaction' call for Linux/i386. - Copyright (C) 1991, 1995, 1996, 1997, 1998 Free Software Foundation, Inc. + Copyright (C) 1991, 95, 96, 97, 98, 99 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 @@ -25,6 +25,8 @@ #include <sysdep.h> #include <sys/syscall.h> +#include <kernel-features.h> + /* The difference here is that the sigaction structure used in the kernel is not the same as we use in the libc. Therefore we must translate it here. */ @@ -34,9 +36,11 @@ extern int __syscall_rt_sigaction (int, const struct kernel_sigaction *, struct kernel_sigaction *, size_t); +#if __ASSUME_REALTIME_SIGNALS == 0 /* The variable is shared between all wrappers around signal handling functions which have RT equivalents. */ int __libc_missing_rt_sigs; +#endif /* If ACT is not NULL, change the action for SIG to *ACT. @@ -44,15 +48,22 @@ int __libc_missing_rt_sigs; int __sigaction (int sig, const struct sigaction *act, struct sigaction *oact) { +#if __ASSUME_REALTIME_SIGNALS == 0 struct old_kernel_sigaction k_newact, k_oldact; +#endif int result; #ifdef __NR_rt_sigaction + /* First try the RT signals. */ +# if __ASSUME_REALTIME_SIGNALS == 0 if (!__libc_missing_rt_sigs) +# endif { struct kernel_sigaction kact, koact; +# if __ASSUME_REALTIME_SIGNALS == 0 int saved_errno = errno; +# endif if (act) { @@ -69,7 +80,9 @@ __sigaction (int sig, const struct sigaction *act, struct sigaction *oact) result = INLINE_SYSCALL (rt_sigaction, 4, sig, act ? &kact : NULL, oact ? &koact : NULL, _NSIG / 8); +# if __ASSUME_REALTIME_SIGNALS == 0 if (result >= 0 || errno != ENOSYS) +# endif { if (oact && result >= 0) { @@ -81,11 +94,14 @@ __sigaction (int sig, const struct sigaction *act, struct sigaction *oact) 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_newact.k_sa_handler = act->sa_handler; @@ -119,6 +135,7 @@ __sigaction (int sig, const struct sigaction *act, struct sigaction *oact) } return 0; +#endif restore: asm ( |