open_append(3) [debian man page]

open_append(3)						     Library Functions Manual						    open_append(3)

NAME

       open_append - open a file for appending

SYNTAX

       #include <open.h>

       int open_append(const char *filename);

DESCRIPTION

       open_append  opens  the	file  filename for appending write-only use and returns the file handle.  If it does not exist, it will be created
       with mode 0600.	If there was an error opening or creating the file, open_append returns -1 and sets errno accordingly.

       All write operations will append after the last byte, regardless of previous calls to lseek(2) or other processes  also	appending  to  the
       same file.

SEE ALSO

       open(2)

																    open_append(3)

FLOPEN(3)						   BSD Library Functions Manual 						 FLOPEN(3)

NAME

     flopen -- reliably open and lock a file

LIBRARY

     Utility functions from BSD systems (libbsd, -lbsd)

SYNOPSIS

     #include <sys/fcntl.h>
     #include <bsd/libutil.h>

     int
     flopen(const char *path, int flags);

     int
     flopen(const char *path, int flags, mode_t mode);

DESCRIPTION

     The flopen() function opens or creates a file and acquires an exclusive lock on it.  It is essentially equivalent with calling open() with
     the same parameters followed by flock() with an operation argument of LOCK_EX, except that flopen() will attempt to detect and handle races
     that may occur between opening / creating the file and locking it.  Thus, it is well suited for opening lock files, PID files, spool files,
     mailboxes and other kinds of files which are used for synchronization between processes.

     If flags includes O_NONBLOCK and the file is already locked, flopen() will fail and set errno to EWOULDBLOCK.

     As with open(), the additional mode argument is required if flags includes O_CREAT.

RETURN VALUES

     If successful, flopen() returns a valid file descriptor.  Otherwise, it returns -1, and sets errno as described in flock(2) and open(2).

SEE ALSO

     errno(2), flock(2), open(2)

AUTHORS

     The flopen function and this manual page were written by Dag-Erling Smorgrav <des@FreeBSD.org>.

BSD
								   June 6, 2009 							       BSD