107 lines
2.8 KiB
Plaintext
107 lines
2.8 KiB
Plaintext
.TH READDIR 3am "Oct 30 2019" "Free Software Foundation" "GNU Awk Extension Modules"
|
|
.SH NAME
|
|
readdir \- directory input parser for gawk
|
|
.SH SYNOPSIS
|
|
.ft CW
|
|
@load "readdir"
|
|
.ft R
|
|
.SH DESCRIPTION
|
|
The
|
|
.I readdir
|
|
extension
|
|
adds an input parser for directories.
|
|
.PP
|
|
When this extension is in use, instead of skipping directories named
|
|
on the command line (or with
|
|
.BR getline ),
|
|
they are read, with each entry returned as a record.
|
|
.PP
|
|
The record consists of three fields. The first two are the inode number and the
|
|
filename, separated by a forward slash character.
|
|
On systems where the directory entry contains the file type, the record
|
|
has a third field which is a single letter indicating the type of the
|
|
file:
|
|
.B f
|
|
for file,
|
|
.B d
|
|
for directory,
|
|
.B b
|
|
for a block device,
|
|
.B c
|
|
for a character device,
|
|
.B p
|
|
for a FIFO,
|
|
.B l
|
|
for a symbolic link,
|
|
.B s
|
|
for a socket.
|
|
.PP
|
|
On systems without the file type information, the extension falls back
|
|
to calling
|
|
.IR stat (2),
|
|
in order to provide the information.
|
|
Thus the third field should never be
|
|
.BR u .
|
|
.PP
|
|
By default, if a directory cannot be opened (due to permission problems,
|
|
for example),
|
|
.I gawk
|
|
will exit.
|
|
As with regular files, this situation can be handled using a
|
|
.B BEGINFILE
|
|
rule that checks
|
|
.B ERRNO
|
|
and prints an error or otherwise handles the problem.
|
|
.\" .SH BUGS
|
|
.SH EXAMPLE
|
|
.ft CW
|
|
.nf
|
|
@load "readdir"
|
|
\&...
|
|
BEGIN { FS = "/" }
|
|
{ print "file name is", $2 }
|
|
.fi
|
|
.ft R
|
|
.SH "SEE ALSO"
|
|
.IR "GAWK: Effective AWK Programming" ,
|
|
.IR filefuncs (3am),
|
|
.IR fnmatch (3am),
|
|
.IR fork (3am),
|
|
.IR inplace (3am),
|
|
.IR ordchr (3am),
|
|
.IR readfile (3am),
|
|
.IR revoutput (3am),
|
|
.IR rwarray (3am),
|
|
.IR time (3am).
|
|
.PP
|
|
.IR opendir (3),
|
|
.IR readdir (3),
|
|
.IR stat (2).
|
|
.SH AUTHOR
|
|
Arnold Robbins,
|
|
.BR arnold@skeeve.com .
|
|
.SH COPYING PERMISSIONS
|
|
Copyright \(co 2012, 2013, 2018, 2019
|
|
Free Software Foundation, Inc.
|
|
.PP
|
|
Permission is granted to make and distribute verbatim copies of
|
|
this manual page provided the copyright notice and this permission
|
|
notice are preserved on all copies.
|
|
.ig
|
|
Permission is granted to process this file through troff and print the
|
|
results, provided the printed document carries copying permission
|
|
notice identical to this one except for the removal of this paragraph
|
|
(this paragraph not being relevant to the printed manual page).
|
|
..
|
|
.PP
|
|
Permission is granted to copy and distribute modified versions of this
|
|
manual page under the conditions for verbatim copying, provided that
|
|
the entire resulting derived work is distributed under the terms of a
|
|
permission notice identical to this one.
|
|
.PP
|
|
Permission is granted to copy and distribute translations of this
|
|
manual page into another language, under the above conditions for
|
|
modified versions, except that this permission notice may be stated in
|
|
a translation approved by the Foundation.
|
|
.\" vim: set filetype=nroff :
|