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freebsd/lib/libufs/cgread.3

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Commit rudimentary libufs manual pages, except for that for getino(3)/putino(3), inode.c has been reworked in Perforce to the point where a manual page may not be accurate. Certainly putino(3) has not even been merged back yet. These will need a lot of improvement for most applications, but they document the API enough to get someone on their feet, most likely. The best documentation still exists in the form of libufs(3) consumers in the base system.
2003-06-09 09:59:11 +00:00
.\" Author: Juli Mallett <jmallett@FreeBSD.org>
.\" Date: June 04, 2003
.\" Description:
.\" Manual page for libufs functions:
.\" cgread(3)
.\" cgread1(3)
.\"
Left out the critical part of my "public domain" template, a notice saying that this file is (these files are) in the public domain. PR: 53149
2003-06-10 18:24:40 +00:00
.\" This file is in the public domain.
.\"
Commit rudimentary libufs manual pages, except for that for getino(3)/putino(3), inode.c has been reworked in Perforce to the point where a manual page may not be accurate. Certainly putino(3) has not even been merged back yet. These will need a lot of improvement for most applications, but they document the API enough to get someone on their feet, most likely. The best documentation still exists in the form of libufs(3) consumers in the base system.
2003-06-09 09:59:11 +00:00
.\" $FreeBSD$
.\"
Fixed spelling of the document date.
2004-07-02 18:00:03 +00:00
.Dd June 4, 2003
Commit rudimentary libufs manual pages, except for that for getino(3)/putino(3), inode.c has been reworked in Perforce to the point where a manual page may not be accurate. Certainly putino(3) has not even been merged back yet. These will need a lot of improvement for most applications, but they document the API enough to get someone on their feet, most likely. The best documentation still exists in the form of libufs(3) consumers in the base system.
2003-06-09 09:59:11 +00:00
.Dt CGREAD 3
.Os
.Sh NAME
.Nm cgread , cgread1
.Nd read cylinder groups of UFS disks
.Sh LIBRARY
.Lb libufs
.Sh SYNOPSIS
.In sys/param.h
.In sys/mount.h
.In ufs/ufs/ufsmount.h
.In ufs/ufs/dinode.h
.In ufs/ffs/fs.h
.In libufs.h
.Ft int
.Fn cgread "struct uufsd *disk"
.Ft int
.Fn cgread1 "struct uufsd *disk" "int c"
.Sh DESCRIPTION
The
.Fn cgread
and
.Fn cgread1
functions provide cylinder group reads for
.Xr libufs 3
consumers.
The
.Fn cgread1
function reads from one cylinder group, specified by
.Fa c
into the
Markup fixes.
2004-07-05 06:53:34 +00:00
.Va d_cg
Commit rudimentary libufs manual pages, except for that for getino(3)/putino(3), inode.c has been reworked in Perforce to the point where a manual page may not be accurate. Certainly putino(3) has not even been merged back yet. These will need a lot of improvement for most applications, but they document the API enough to get someone on their feet, most likely. The best documentation still exists in the form of libufs(3) consumers in the base system.
2003-06-09 09:59:11 +00:00
field of a userland UFS disk structure.
It sets the
Markup fixes.
2004-07-05 06:53:34 +00:00
.Va d_lcg
Various cleanups of careless mistakes/omissions. PR: 53149 Submitted by: Lukas Ertl <l.ertl@univie.ac.at>
2003-06-10 18:36:16 +00:00
field to the cylinder group number
Commit rudimentary libufs manual pages, except for that for getino(3)/putino(3), inode.c has been reworked in Perforce to the point where a manual page may not be accurate. Certainly putino(3) has not even been merged back yet. These will need a lot of improvement for most applications, but they document the API enough to get someone on their feet, most likely. The best documentation still exists in the form of libufs(3) consumers in the base system.
2003-06-09 09:59:11 +00:00
.Fa c .
.Pp
The
.Fn cgread
function operates on sequential cylinder groups.
Calling the
.Fn cgread
function is equivalent to calling
Markup fixes.
2004-07-05 06:53:34 +00:00
.Fn cgread1
Commit rudimentary libufs manual pages, except for that for getino(3)/putino(3), inode.c has been reworked in Perforce to the point where a manual page may not be accurate. Certainly putino(3) has not even been merged back yet. These will need a lot of improvement for most applications, but they document the API enough to get someone on their feet, most likely. The best documentation still exists in the form of libufs(3) consumers in the base system.
2003-06-09 09:59:11 +00:00
with a cylinder group specifier equivalent to the value of the current
Markup fixes.
2004-07-05 06:53:34 +00:00
.Va d_ccg
Commit rudimentary libufs manual pages, except for that for getino(3)/putino(3), inode.c has been reworked in Perforce to the point where a manual page may not be accurate. Certainly putino(3) has not even been merged back yet. These will need a lot of improvement for most applications, but they document the API enough to get someone on their feet, most likely. The best documentation still exists in the form of libufs(3) consumers in the base system.
2003-06-09 09:59:11 +00:00
field, and then incrementing the
Markup fixes.
2004-07-05 06:53:34 +00:00
.Va d_ccg
Commit rudimentary libufs manual pages, except for that for getino(3)/putino(3), inode.c has been reworked in Perforce to the point where a manual page may not be accurate. Certainly putino(3) has not even been merged back yet. These will need a lot of improvement for most applications, but they document the API enough to get someone on their feet, most likely. The best documentation still exists in the form of libufs(3) consumers in the base system.
2003-06-09 09:59:11 +00:00
field.
Markup fixes.
2004-07-05 06:53:34 +00:00
.Sh RETURN VALUES
Commit rudimentary libufs manual pages, except for that for getino(3)/putino(3), inode.c has been reworked in Perforce to the point where a manual page may not be accurate. Certainly putino(3) has not even been merged back yet. These will need a lot of improvement for most applications, but they document the API enough to get someone on their feet, most likely. The best documentation still exists in the form of libufs(3) consumers in the base system.
2003-06-09 09:59:11 +00:00
Both functions return 0 if there are no more cylinder groups to read,
Markup fixes.
2004-07-05 06:53:34 +00:00
1 if there are more cylinder groups, and \-1 on error.
Commit rudimentary libufs manual pages, except for that for getino(3)/putino(3), inode.c has been reworked in Perforce to the point where a manual page may not be accurate. Certainly putino(3) has not even been merged back yet. These will need a lot of improvement for most applications, but they document the API enough to get someone on their feet, most likely. The best documentation still exists in the form of libufs(3) consumers in the base system.
2003-06-09 09:59:11 +00:00
.Sh ERRORS
The function
.Fn cgread
may fail and set
.Va errno
for any of the errors specified for the library function
.Xr bread 3 .
.Pp
The function
.Fn cgread1
has semantically identical failure conditions to those of
.Fn cgread .
.Sh SEE ALSO
.Xr bread 3 ,
.Xr libufs 3
.Sh HISTORY
These functions first appeared as part of
.Xr libufs 3
in
.Fx 5.1 .
.Sh AUTHORS
.An Juli Mallett Aq jmallett@FreeBSD.org
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