Move enum trace_event into a separate header

As it will have users outside strace.c in the future.

* trace_event.h (enum trace_event): Move it from...
* strace.c (enum trace_event): ...here.
(#include "trace_event.h"): New header, for enum trace_event.
* Makefile.am (strace_SOURCES): Add trace_event.h.

Author: esyr-rh

Makefile.am

@@ -306,6 +306,7 @@ strace_SOURCES =	\
 	term.c		\
 	time.c		\
 	times.c		\
+	trace_event.h	\
 	truncate.c	\
 	ubi.c		\
 	ucopy.c		\

strace.c

@@ -50,6 +50,7 @@
 #include "scno.h"
 #include "ptrace.h"
 #include "printsiginfo.h"
+#include "trace_event.h"
 
 /* In some libc, these aren't declared. Do it ourself: */
 extern char **environ;
@@ -2191,64 +2192,6 @@ print_event_exit(struct tcb *tcp)
 	line_ended();
 }
 
-enum trace_event {
-	/* Break the main loop. */
-	TE_BREAK,
-
-	/* Call next_event() again. */
-	TE_NEXT,
-
-	/* Restart the tracee with signal 0 and call next_event() again. */
-	TE_RESTART,
-
-	/*
-	 * For all the events below, current_tcp is set to current tracee's
-	 * tcb.  All the suggested actions imply that you want to continue
-	 * tracing of the current tracee; alternatively, you can detach it.
-	 */
-
-	/*
-	 * Syscall entry or exit.
-	 * Restart the tracee with signal 0, or with an injected signal number.
-	 */
-	TE_SYSCALL_STOP,
-
-	/*
-	 * Tracee received signal with number WSTOPSIG(*pstatus); signal info
-	 * is written to *si.  Restart the tracee (with that signal number
-	 * if you want to deliver it).
-	 */
-	TE_SIGNAL_DELIVERY_STOP,
-
-	/*
-	 * Tracee was killed by a signal with number WTERMSIG(*pstatus).
-	 */
-	TE_SIGNALLED,
-
-	/*
-	 * Tracee was stopped by a signal with number WSTOPSIG(*pstatus).
-	 * Restart the tracee with that signal number.
-	 */
-	TE_GROUP_STOP,
-
-	/*
-	 * Tracee exited with status WEXITSTATUS(*pstatus).
-	 */
-	TE_EXITED,
-
-	/*
-	 * Tracee is going to perform execve().
-	 * Restart the tracee with signal 0.
-	 */
-	TE_STOP_BEFORE_EXECVE,
-
-	/*
-	 * Tracee is going to terminate.
-	 * Restart the tracee with signal 0.
-	 */
-	TE_STOP_BEFORE_EXIT,
-};
-
 static enum trace_event
 next_event(int *pstatus, siginfo_t *si)
 {

trace_event.h

@@ -0,0 +1,91 @@
+/*
+ * Copyright (c) 2017 The strace developers.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef STRACE_TRACE_EVENT_H
+#define STRACE_TRACE_EVENT_H
+
+/* Possible trace event loop states. Returned by next_event() and dispatched by
+ * dispatch_event(). */
+enum trace_event {
+	/* Break the main loop. */
+	TE_BREAK,
+
+	/* Call next_event() again. */
+	TE_NEXT,
+
+	/* Restart the tracee with signal 0 and call next_event() again. */
+	TE_RESTART,
+
+	/*
+	 * For all the events below, current_tcp is set to current tracee's
+	 * tcb.  All the suggested actions imply that you want to continue
+	 * tracing of the current tracee; alternatively, you can detach it.
+	 */
+
+	/*
+	 * Syscall entry or exit.
+	 * Restart the tracee with signal 0, or with an injected signal number.
+	 */
+	TE_SYSCALL_STOP,
+
+	/*
+	 * Tracee received signal with number WSTOPSIG(*pstatus); signal info
+	 * is written to *si.  Restart the tracee (with that signal number
+	 * if you want to deliver it).
+	 */
+	TE_SIGNAL_DELIVERY_STOP,
+
+	/*
+	 * Tracee was killed by a signal with number WTERMSIG(*pstatus).
+	 */
+	TE_SIGNALLED,
+
+	/*
+	 * Tracee was stopped by a signal with number WSTOPSIG(*pstatus).
+	 * Restart the tracee with that signal number.
+	 */
+	TE_GROUP_STOP,
+
+	/*
+	 * Tracee exited with status WEXITSTATUS(*pstatus).
+	 */
+	TE_EXITED,
+
+	/*
+	 * Tracee is going to perform execve().
+	 * Restart the tracee with signal 0.
+	 */
+	TE_STOP_BEFORE_EXECVE,
+
+	/*
+	 * Tracee is going to terminate.
+	 * Restart the tracee with signal 0.
+	 */
+	TE_STOP_BEFORE_EXIT,
+};
+
+#endif /* !STRACE_TRACE_EVENT_H */