3.147 open

Function

Open and possibly create a file.

Header

fcntl.h

Declaration

int open (const char* name, int flags, ...);

Description

open opens a file and returns the file descriptor associated with it. On error, -1 is returned and an error code is stored in errno. Several flags may be passed to open that change the behaviour.

Limits

• POSIX specifies an additional mode argument that may be passed to open, which is used as the permission mask when a new file is created. While cc65 allows to pass this argument, it is ignored.

Availability

POSIX 1003.1

See also

close, creat

Example

None.