SIMPLE SOLUTIONS

OPEN_EXCL(3) - man page online | library functions

Open a file for exclusive writing.

Chapter
open_excl(3)                         Library Functions Manual                        open_excl(3)

NAME

open_excl - open a file for exclusive writing

SYNTAX

#include <open.h> int open_excl(const char *filename);

DESCRIPTION

open_excl opens the file filename for writing and returns the file handle. The file may not exist before the call to open_excl. The file will be created with mode 0600. If there was an error creating the file, open_excl returns -1 and sets errno accordingly. Since open_excl relies on the O_EXCL flag to open, it does not work reliably over NFS (the NFS protocol is broken) and must be emulated using a lock file (create a file with a unique file name and link(2) it to the lock file. Then stat the lock file and see if the link count is 2).

SEE ALSO

open(2)
open_excl(3)
This manual Reference Other manuals
open_excl(3) referred by
refer to link(2) | open(2)