doc/technical/file-management.txt

Overview of the file management subsystem
Adrian Chadd <adrian@creative.net.au>

$Id$

File operations
---------------

The file operations are also wrapped through file_open() and file_close()
which handle calling fd_open() / fd_close() and tracking the filedescriptors
correctly. fbopen() / fbclose() use file_open() / file_close() too.

fileio.c defines the functions:

int
file_open(const char *filename, int mode, int fmode)

A wrapper around open(filename, flags, mode). Read the open manpage for
information. file_open() enforces filedescriptor limits and tags the FD
through fd_open().

void
file_close(int fd)

A wrapper around close() for files. close() handles fd_close()ing the fd.


FBFILE *
fbopen(const char *filename, const char *mode)

void
fbclose(FBFILE *fb)

These are the 'buffered disk IO' routines. You can read the code yourself.
Note that these routines use file_open() and file_close().
Revision:	34
Committed:	Sun Oct 2 21:05:51 2005 UTC (20 years, 10 months ago) by lusky
Content type:	text/plain
File size:	913 byte(s)
Log Message:	create 7.2 branch, we can move/rename it as needed.
#	User	Rev	Content
1	adx	30	Overview of the file management subsystem
2			Adrian Chadd <adrian@creative.net.au>
3
4	knight	31	$Id$
5	adx	30
6			File operations
7			---------------
8
9			The file operations are also wrapped through file_open() and file_close()
10			which handle calling fd_open() / fd_close() and tracking the filedescriptors
11			correctly. fbopen() / fbclose() use file_open() / file_close() too.
12
13			fileio.c defines the functions:
14
15			int
16			file_open(const char *filename, int mode, int fmode)
17
18			A wrapper around open(filename, flags, mode). Read the open manpage for
19			information. file_open() enforces filedescriptor limits and tags the FD
20			through fd_open().
21
22			void
23			file_close(int fd)
24
25			A wrapper around close() for files. close() handles fd_close()ing the fd.
26
27
28			FBFILE *
29			fbopen(const char filename, const char mode)
30
31			void
32			fbclose(FBFILE *fb)
33
34			These are the 'buffered disk IO' routines. You can read the code yourself.
35			Note that these routines use file_open() and file_close().