417 lines
11 KiB
Groff
417 lines
11 KiB
Groff
.\" Copyright (c) 1980, 1990, 1991, 1993, 1994
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.\" The Regents of the University of California. All rights reserved.
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.\"
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.\" This code is derived from software contributed to Berkeley by
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.\" the Institute of Electrical and Electronics Engineers, Inc.
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer.
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice, this list of conditions and the following disclaimer in the
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.\" documentation and/or other materials provided with the distribution.
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.\" 3. All advertising materials mentioning features or use of this software
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.\" must display the following acknowledgment:
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.\" This product includes software developed by the University of
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.\" California, Berkeley and its contributors.
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.\" 4. Neither the name of the University nor the names of its contributors
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.\" may be used to endorse or promote products derived from this software
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.\" without specific prior written permission.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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.\" SUCH DAMAGE.
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.\"
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.\" @(#)ls.1 8.7 (Berkeley) 7/29/94
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.\" $FreeBSD$
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.\"
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.Dd July 29, 1994
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.Dt LS 1
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.Os
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.Sh NAME
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.Nm ls
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.Nd list directory contents
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.Sh SYNOPSIS
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.Nm ls
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.Op Fl ABCFHLPRTWabcdfgikloqrstu1
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.Op Ar file ...
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.Sh DESCRIPTION
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For each operand that names a
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.Ar file
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of a type other than
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directory,
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.Nm
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displays its name as well as any requested,
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associated information.
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For each operand that names a
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.Ar file
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of type directory,
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.Nm
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displays the names of files contained
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within that directory, as well as any requested, associated
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information.
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.Pp
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If no operands are given, the contents of the current
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directory are displayed.
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If more than one operand is given,
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non-directory operands are displayed first; directory
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and non-directory operands are sorted separately and in
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lexicographical order.
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.Pp
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The following options are available:
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.Bl -tag -width indent
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.It Fl A
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List all entries except for
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.Ql \&.
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and
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.Ql \&.. .
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Always set for the super-user.
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.It Fl B
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Force printing of non-graphic characters in file names as \\xxx,
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where xxx is the numeric value of the character in octal.
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.It Fl C
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Force multi-column output; this is the default when output is to a terminal.
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.It Fl F
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Display a slash (/) immediately after each pathname
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that is a directory, an asterisk (*) after each that is
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executable,
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an at sign (@) after each symbolic link,
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an equals sign (=) after each socket,
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a percent sign (%) after each whiteout,
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and a vertical bar (|) after each that is a
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.Tn FIFO .
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.It Fl H
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Symbolic links on the command line are followed. This option is assumed if
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none of the
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.Fl F ,
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.Fl d ,
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or
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.Fl l
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options are specified.
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.It Fl L
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If argument is a symbolic link, list the file or directory the link references
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rather than the link itself. This option cancels the
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.Fl P
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option.
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.It Fl P
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If argument is a symbolic link, list the link itself rather than the
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object the link references. This option cancels the
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.Fl H
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and
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.Fl L
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options.
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.It Fl R
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Recursively list subdirectories encountered.
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.It Fl T
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Display complete time information for the file, including
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month, day, hour, minute, second, and year.
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.It Fl W
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Display whiteouts when scanning directories.
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.It Fl a
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Include directory entries whose names begin with a
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dot (.).
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.It Fl b
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As
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.Fl B ,
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but use C escape codes whenever possible.
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.It Fl c
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Use time when file status was last changed for sorting or printing.
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.It Fl d
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Directories are listed as plain files (not searched recursively).
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.It Fl f
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Output is not sorted.
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.It Fl g
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This option is deprecated and is only available for compatibility
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with
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.Bx 4.3 ;
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it was used to display the group name in the long
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.Pq Fl l
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format output.
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.It Fl i
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For each file, print the file's file serial number (inode number).
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.It Fl k
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If the
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.Fl s
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option is specified, print the file size allocation in kilobytes,
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not blocks. This option overrides the environment variable BLOCKSIZE.
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.It Fl l
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(The lowercase letter ``ell.'') List in long format. (See below.)
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If the output is to a terminal, a total sum for all the file
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sizes is output on a line before the long listing.
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.It Fl n
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Display user and group IDs numerically rather than converting to a user
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or group name in a long
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.Pq Fl l
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output.
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.It Fl o
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Include the file flags in a long
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.Pq Fl l
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output.
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.It Fl q
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Force printing of non-graphic characters in file names as
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the character `?'; this is the default when output is to a terminal.
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.It Fl r
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Reverse the order of the sort to get reverse
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lexicographical order or the oldest entries first.
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.It Fl s
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Display the number of file system blocks actually used by each file, in units
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of 512 bytes, where partial units are rounded up to the next integer value.
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If the output is to a terminal, a total sum for all the file
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sizes is output on a line before the listing. The environment variable
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BLOCKSIZE overrides the unit size of 512 bytes.
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.It Fl t
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Sort by time modified (most recently modified
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first) before sorting the operands by lexicographical
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order.
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.It Fl u
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Use time of last access,
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instead of last modification
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of the file for sorting
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.Pq Fl t
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or printing
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.Pq Fl l .
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.It Fl \&1
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(The numeric digit ``one.'') Force output to be
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one entry per line.
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This is the default when
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output is not to a terminal.
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.El
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.Pp
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The
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.Fl 1 ,
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.Fl C ,
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and
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.Fl l
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options all override each other; the last one specified determines
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the format used.
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.Pp
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The
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.Fl c
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and
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.Fl u
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options override each other; the last one specified determines
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the file time used.
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.Pp
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The
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.Fl B ,
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.Fl b
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and
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.Fl q
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options all override each other; the last one specified determines
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the format used for non-printable characters.
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.Pp
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The
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.Fl H,
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.Fl L
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and
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.Fl P
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options all override each other (either partially or fully); they
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are applied in the order specified.
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.Pp
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By default,
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.Nm
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lists one entry per line to standard
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output; the exceptions are to terminals or when the
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.Fl C
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option is specified.
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.Pp
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File information is displayed with one or more
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<blank>s separating the information associated with the
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.Fl i ,
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.Fl s ,
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and
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.Fl l
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options.
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.Ss The Long Format
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If the
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.Fl l
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option is given, the following information
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is displayed for each file:
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file mode,
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number of links, owner name, group name,
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number of bytes in the file, abbreviated
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month, day-of-month file was last modified,
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hour file last modified, minute file last
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modified, and the pathname.
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In addition, for each directory whose contents are displayed, the total
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number of 512-byte blocks used by the files in the directory is displayed
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on a line by itself immediately before the information for the files in the
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directory.
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.Pp
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If the modification time of the file is more than 6 months
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in the past or future, then the year of the last modification
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is displayed in place of the hour and minute fields.
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.Pp
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If the owner or group names are not a known user or group name,
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or the
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.Fl n
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option is given,
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the numeric ID's are displayed.
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.Pp
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If the file is a character special or block special file,
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the major and minor device numbers for the file are displayed
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in the size field. If the file is a symbolic link the pathname of the
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linked-to file is preceded by
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.Dq \-> .
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.Pp
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The file mode printed under the
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.Fl l
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option consists of the
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entry type, owner permissions, and group permissions.
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The entry type character describes the type of file, as
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follows:
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.Pp
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.Bl -tag -width 4n -offset indent -compact
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.It Sy b
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Block special file.
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.It Sy c
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Character special file.
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.It Sy d
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Directory.
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.It Sy l
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Symbolic link.
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.It Sy s
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Socket link.
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.It Sy p
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.Tn FIFO .
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.It Sy \-
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Regular file.
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.El
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.Pp
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The next three fields
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are three characters each:
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owner permissions,
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group permissions, and
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other permissions.
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Each field has three character positions:
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.Bl -enum -offset indent
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.It
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If
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.Sy r ,
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the file is readable; if
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.Sy \- ,
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it is not readable.
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.It
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If
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.Sy w ,
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the file is writable; if
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.Sy \- ,
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it is not writable.
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.It
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The first of the following that applies:
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.Bl -tag -width 4n -offset indent
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.It Sy S
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If in the owner permissions, the file is not executable and
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set-user-ID mode is set.
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If in the group permissions, the file is not executable
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and set-group-ID mode is set.
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.It Sy s
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If in the owner permissions, the file is executable
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and set-user-ID mode is set.
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If in the group permissions, the file is executable
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and setgroup-ID mode is set.
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.It Sy x
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The file is executable or the directory is
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searchable.
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.It Sy \-
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The file is neither readable, writable, executable,
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nor set-user-ID nor set-group-ID mode, nor sticky. (See below.)
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.El
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.Pp
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These next two apply only to the third character in the last group
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(other permissions).
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.Bl -tag -width 4n -offset indent
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.It Sy T
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The sticky bit is set
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(mode
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.Li 1000 ) ,
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but not execute or search permission. (See
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.Xr chmod 1
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or
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.Xr sticky 8 . )
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.It Sy t
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The sticky bit is set (mode
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.Li 1000 ) ,
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and is searchable or executable.
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(See
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.Xr chmod 1
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or
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.Xr sticky 8 . )
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.El
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.El
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.Sh DIAGNOSTICS
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The
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.Nm
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utility exits 0 on success, and >0 if an error occurs.
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.Sh ENVIRONMENT
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The following environment variables affect the execution of
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.Nm Ns :
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.Bl -tag -width BLOCKSIZE
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.It Ev BLOCKSIZE
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If the environment variable
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.Ev BLOCKSIZE
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is set, the block counts
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(see
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.Fl s )
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will be displayed in units of that size block.
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.It COLUMNS
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If this variable contains a string representing a
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decimal integer, it is used as the
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column position width for displaying
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multiple-text-column output.
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The
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.Nm
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utility calculates how
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many pathname text columns to display
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based on the width provided.
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(See
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.Fl C . )
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.It Ev TZ
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The timezone to use when displaying dates.
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See
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.Xr environ 7
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for more information.
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.It Ev LS_COLWIDTHS
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If this variable is set, it is considered to be a
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colon-delimited list of minimum column widths. Unreasonable
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and insufficient widths are ignored (thus zero signifies
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a dynamically sized column). Not all
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columns have changeable widths. The fields are,
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in order: inode, block count, number of links, user name,
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group name, flags, file size, file name.
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.El
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.Sh COMPATIBILITY
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The group field is now automatically included in the long listing for
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files in order to be compatible with the
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.St -p1003.2
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specification.
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.Sh SEE ALSO
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.Xr chflags 1 ,
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.Xr chmod 1 ,
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.Xr symlink 7 ,
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.Xr sticky 8
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.Sh HISTORY
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An
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.Nm
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command appeared in
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.At v1 .
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.Sh STANDARDS
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The
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.Nm
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function is expected to be a superset of the
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.St -p1003.2
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specification.
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.Sh BUGS
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To maintain backward compatibility, the relationships between the many
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options is quite complex.
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