Index: system.h
===================================================================
--- system.h (nonexistent)
+++ system.h (revision 5)
@@ -0,0 +1,49 @@
+
+/**********************************************************************
+
+ Copyright 2019 Andrey V.Kosteltsev
+
+ Licensed under the Radix.pro License, Version 1.0 (the "License");
+ you may not use this file except in compliance with the License.
+ You may obtain a copy of the License at
+
+ https://radix.pro/licenses/LICENSE-1.0-en_US.txt
+
+ Unless required by applicable law or agreed to in writing, software
+ distributed under the License is distributed on an "AS IS" BASIS,
+ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+ implied.
+
+ **********************************************************************/
+
+#ifndef _SYSTEM_H_
+#define _SYSTEM_H_
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+
+extern pid_t sys_exec_command( const char *cmd );
+
+/*****************************************************************
+ sys_wait_command() - Wait for pid.
+
+ Return values:
+ -------------
+ 0 - SUCCESS
+ >=1 - status returned by child process
+ -1 - Child terminated on signal
+ -2 - Child terminated on unknown reason
+ -3 - Cannot waitpid: waitpid() retusrs -1
+
+ Error message with SIZE length saved into *ERRMSG buffer.
+ *****************************************************************/
+extern int sys_wait_command( pid_t pid, char *errmsg, size_t size );
+
+
+#ifdef __cplusplus
+} /* ... extern "C" */
+#endif
+
+#endif /* _SYSTEM_H_ */