READDIR(3am) GNU Awk Extension Modules READDIR(3am)
NAME
readdir - directory input parser for gawk
SYNOPSIS
@load "readdir"
DESCRIPTION
The readdir extension adds an input parser for directories.
When this extension is in use, instead of skipping directories named on
the command line (or with getline), they are read, with each entry re-
turned as a record.
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: f
for file, d for directory, b for a block device, c for a character de-
vice, p for a FIFO, l for a symbolic link, s for a socket.
On systems without the file type information, the extension falls back
to calling stat(2), in order to provide the information. Thus the
third field should never be u.
By default, if a directory cannot be opened (due to permission prob-
lems, for example), gawk will exit. As with regular files, this situa-
tion can be handled using a BEGINFILE rule that checks ERRNO and prints
an error or otherwise handles the problem.
EXAMPLE
@load "readdir"
...
BEGIN { FS = "/" }
{ print "file name is", $2 }
SEE ALSO
GAWK: Effective AWK Programming, filefuncs(3am), fnmatch(3am),
fork(3am), inplace(3am), ordchr(3am), readfile(3am), revoutput(3am),
rwarray(3am), time(3am).
opendir(3), readdir(3), stat(2).
AUTHOR
Arnold Robbins, arnold@skeeve.com.
COPYING PERMISSIONS
Copyright © 2012, 2013, 2018, 2019 Free Software Foundation, Inc.
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.
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.
Permission is granted to copy and distribute translations of this man-
ual page into another language, under the above conditions for modified
versions, except that this permission notice may be stated in a trans-
lation approved by the Foundation.
Free Software Foundation Oct 30 2019 READDIR(3am)
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