--- /dev/null
+/* Copyright (C) 1992, 1993 Free Software Foundation, Inc.
+ Contributed by Brendan Kehoe (brendan@cygnus.com).
+
+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., 675 Mass Ave,
+Cambridge, MA 02139, USA. */
+
+#ifdef _SIGNAL_H
+
+/* This file defines the fake signal functions and signal
+ number constants for System V Release 4 UNIX. */
+
+/* Fake signal functions. */
+#define SIG_ERR ((__sighandler_t) -1)
+#define SIG_DFL ((__sighandler_t) 0)
+#define SIG_IGN ((__sighandler_t) 1)
+
+
+/* Signals. */
+#define SIGHUP 1 /* Hangup (POSIX). */
+#define SIGINT 2 /* Interrupt (ANSI). */
+#define SIGQUIT 3 /* Quit (POSIX). */
+#define SIGILL 4 /* Illegal instruction (ANSI). */
+#define SIGABRT SIGIOT /* Abort (ANSI). */
+#define SIGTRAP 5 /* Trace trap (POSIX). */
+#define SIGIOT 6 /* IOT trap. */
+#define SIGEMT 7 /* EMT trap. */
+#define SIGFPE 8 /* Floating-point exception (ANSI). */
+#define SIGKILL 9 /* Kill, unblockable (POSIX). */
+#define SIGBUS 10 /* Bus error. */
+#define SIGSEGV 11 /* Segmentation violation (ANSI). */
+#define SIGSYS 12 /* Bad argument to system call*/
+#define SIGPIPE 13 /* Broken pipe (POSIX). */
+#define SIGALRM 14 /* Alarm clock (POSIX). */
+#define SIGTERM 15 /* Termination (ANSI). */
+#define SIGUSR1 16 /* User-defined signal 1 (POSIX). */
+#define SIGUSR2 17 /* User-defined signal 2 (POSIX). */
+#define SIGCHLD 18 /* Child status has changed (POSIX). */
+#define SIGCLD SIGCHLD /* Same as SIGCHLD (System V). */
+#define SIGPWR 19 /* Power going down. */
+#define SIGSTOP 20 /* Stop, unblockable (POSIX). */
+#define SIGTSTP 21 /* Keyboard stop (POSIX). */
+#define SIGPOLL 22 /* Same as SIGIO? (SVID). */
+#define SIGIO 23 /* I/O now possible. */
+#define SIGURG 24 /* Urgent condition on socket.*/
+#define SIGWINCH 25 /* Window size change. */
+#define SIGVTALRM 26 /* Virtual alarm clock. */
+#define SIGPROF 27 /* Profiling alarm clock. */
+#define SIGCONT 28 /* Continue (POSIX). */
+#define SIGTTIN 29 /* Background read from tty (POSIX). */
+#define SIGTTOU 30 /* Background write to tty (POSIX). */
+#define SIGXCPU 31 /* CPU limit exceeded. */
+#define SIGXFSZ 32 /* File size limit exceeded. */
+
+#endif /* <signal.h> included. */
+
+#define _NSIG 33 /* Biggest signal number + 1. */