diff options
| -rw-r--r-- | libc/signal/Makefile | 2 | ||||
| -rw-r--r-- | libc/signal/sigintr.c | 57 |
2 files changed, 58 insertions, 1 deletions
diff --git a/libc/signal/Makefile b/libc/signal/Makefile index e4fa6b7b4..7973177f7 100644 --- a/libc/signal/Makefile +++ b/libc/signal/Makefile @@ -24,7 +24,7 @@ TOPDIR=../ include $(TOPDIR)Rules.mak LIBC=$(TOPDIR)libc.a -CSRC=bsd_sig.c raise.c sigblock.c siggtmsk.c sigjmp.c signal.c \ +CSRC=bsd_sig.c raise.c sigblock.c siggtmsk.c sigjmp.c signal.c sigintr.c\ sigpause.c sigstmsk.c sigaddset.c sigdelset.c sigismem.c sigemptyset.c COBJS=$(patsubst %.c,%.o, $(CSRC)) diff --git a/libc/signal/sigintr.c b/libc/signal/sigintr.c new file mode 100644 index 000000000..483e5b71c --- /dev/null +++ b/libc/signal/sigintr.c @@ -0,0 +1,57 @@ +/* Copyright (C) 1992, 1994, 1996 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 + modify it under the terms of the GNU Library General Public License as + published by the Free Software Foundation; either version 2 of the + License, or (at your option) any later version. + + The GNU C 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 GNU + Library General Public License for more details. + + You should have received a copy of the GNU Library General Public + License along with the GNU C Library; see the file COPYING.LIB. If not, + write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, + Boston, MA 02111-1307, USA. */ + +#include <stddef.h> +#include <signal.h> +#include <errno.h> + +/* If INTERRUPT is nonzero, make signal SIG interrupt system calls + (causing them to fail with EINTR); if INTERRUPT is zero, make system + calls be restarted after signal SIG. */ +int +siginterrupt (sig, interrupt) + int sig; + int interrupt; +{ +#ifdef SA_RESTART + extern sigset_t _sigintr; /* Defined in signal.c. */ + struct sigaction action; + + if (sigaction (sig, (struct sigaction *) NULL, &action) < 0) + return -1; + + if (interrupt) + { + sigaddset (&_sigintr, sig); + action.sa_flags &= ~SA_RESTART; + } + else + { + sigdelset (&_sigintr, sig); + action.sa_flags |= SA_RESTART; + } + + if (sigaction (sig, &action, (struct sigaction *) NULL) < 0) + return -1; + + return 0; +#else + __set_errno (ENOSYS); + return -1; +#endif +} |