/usr/include/postfix/open_lock.h is in postfix-dev 2.11.3-1+deb8u2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 | #ifndef _OPEN_LOCK_H_INCLUDED_
#define _OPEN_LOCK_H_INCLUDED_
/*++
/* NAME
/* open_lock 3h
/* SUMMARY
/* open or create file and lock it for exclusive access
/* SYNOPSIS
/* #include <open_lock.h>
/* DESCRIPTION
/* .nf
/*
* System library.
*/
#include <fcntl.h>
/*
* Utility library.
*/
#include <vstream.h>
#include <vstring.h>
/*
* External interface.
*/
extern VSTREAM *open_lock(const char *, int, mode_t, VSTRING *);
/* LICENSE
/* .ad
/* .fi
/* The Secure Mailer license must be distributed with this software.
/* AUTHOR(S)
/* Wietse Venema
/* IBM T.J. Watson Research
/* P.O. Box 704
/* Yorktown Heights, NY 10598, USA
/*--*/
#endif
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