usr.bin/stat/stat.1 - master - nerfur/openbsd-src

usr.bin/stat/stat.1
494 строки11 KB
schwarze
more Version 1 AT&T UNIX history:
07 сен 2019, 13:28
07 сен 2019, 13:28feb74a7
.\"	$OpenBSD: stat.1,v 1.24 2019/09/07 10:28:27 schwarze Exp $
.\"	$NetBSD: stat.1,v 1.11 2003/05/08 13:07:10 wiz Exp $
.\"
.\" Copyright (c) 2002 The NetBSD Foundation, Inc.
.\" All rights reserved.
.\"
.\" This code is derived from software contributed to The NetBSD Foundation
.\" by Andrew Brown and Jan Schaumann.
.\"
.\" Redistribution and use in source and binary forms, with or without
.\" modification, are permitted provided that the following conditions
.\" are met:
.\" 1. Redistributions of source code must retain the above copyright
.\"    notice, this list of conditions and the following disclaimer.
.\" 2. Redistributions in binary form must reproduce the above copyright
.\"    notice, this list of conditions and the following disclaimer in the
.\"    documentation and/or other materials provided with the distribution.
.\"
.\" THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
.\" ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
.\" TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
.\" PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
.\" BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
.\" CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
.\" SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
.\" INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
.\" CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
.\" ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
.\" POSSIBILITY OF SUCH DAMAGE.
.\"
.Dd $Mdocdate: September 7 2019 $
.Dt STAT 1
.Os
.Sh NAME
.Nm stat
.Nd display file status
.Sh SYNOPSIS
.Nm
.Op Fl FLnq
.Oo
.Fl f Ar format |
.Fl l | r | s | x
.Oc
.Op Fl t Ar timefmt
.Op Ar
.Sh DESCRIPTION
The
.Nm
utility displays information about the file pointed to by
.Ar file .
Read, write, or execute permissions of the named file are not required, but
all directories listed in the pathname leading to the file must be
searchable.
If no argument is given,
.Nm
displays information about the file descriptor for standard input.
.Pp
The information displayed is obtained by calling
.Xr lstat 2
with the given argument and evaluating the returned structure.
The default format displays the
.Fa st_dev ,
.Fa st_ino ,
.Fa st_mode ,
.Fa st_nlink ,
.Fa st_uid ,
.Fa st_gid ,
.Fa st_rdev ,
.Fa st_size ,
.Fa st_atime ,
.Fa st_mtime ,
.Fa st_ctime ,
.Fa st_blksize ,
.Fa st_blocks ,
and
.Fa st_flags
fields, in that order.
.Pp
The options are as follows:
.Bl -tag -width Ds
.It Fl F
As in
.Xr ls 1 ,
display a slash (/) immediately after each pathname that is a directory, an
asterisk (*) after each that is executable, an at sign (@) after each symbolic
link, an equal sign (=) after each socket, and a vertical bar (|) after each
that is a FIFO.
The use of
.Fl F
implies
.Fl l .
.It Fl f Ar format
Display information using the specified format.
See the
.Sx FORMATS
section for a description of valid formats.
.It Fl L
Use
.Xr stat 2
instead of
.Xr lstat 2 .
The information reported by
.Nm
will refer to the target of
.Ar file ,
if file is a symbolic link, and not to
.Ar file
itself.
.It Fl l
Display output in
.Ic ls Fl lT
format.
.It Fl n
Do not force a newline to appear at the end of each piece of output.
.It Fl q
Suppress failure messages if calls to
.Xr stat 2
or
.Xr lstat 2
fail.
.It Fl r
Display raw information.
That is, for all the fields in the stat-structure,
display the raw, numerical value (for example, times in seconds since the
Epoch, etc.).
.It Fl s
Format the output as a line of shell variable assignments.
.It Fl t Ar timefmt
Display timestamps using the specified format.
This format is
passed directly to
.Xr strftime 3 .
.It Fl x
Display information in a more verbose way.
.El
.Ss FORMATS
Format strings are similar to
.Xr printf 3
formats in that they start with
.Cm % ,
are then followed by a sequence of formatting characters, and end in
a character that selects the field of the struct stat which is to be
formatted.
If the
.Cm %
is immediately followed by one of
.Cm n ,
.Cm t ,
.Cm % ,
or
.Cm @ ,
then a newline character, a tab character, a percent character,
or the current file number is printed, otherwise the string is
examined for the following:
.Pp
Any of the following optional flags:
.Bl -tag -width Ds
.It Cm #
Selects an alternate output form for octal and hexadecimal output.
Non-zero octal output will have a leading zero, and non-zero
hexadecimal output will have
.Sq 0x
prepended to it.
.It Cm +
Asserts that a sign indicating whether a number is positive or negative
should always be printed.
Non-negative numbers are not usually printed
with a sign.
.It Cm -
Aligns string output to the left of the field, instead of to the right.
.It Cm 0
Sets the fill character for left padding to the 0 character, instead of
a space.
.It space
Reserves a space at the front of non-negative signed output fields.
A
.Sq Cm +
overrides a space if both are used.
.El
.Pp
Then the following fields:
.Bl -tag -width Ds
.It Cm size
An optional decimal digit string specifying the minimum field width.
.It Cm prec
An optional precision composed of a decimal point
.Sq Cm \&.
and a decimal digit string that indicates the maximum string length,
the number of digits to appear after the decimal point in floating point
output, or the minimum number of digits to appear in numeric output.
.It Cm fmt
An optional output format specifier which is one of
.Cm D ,
.Cm O ,
.Cm U ,
.Cm X ,
.Cm F ,
or
.Cm S .
These represent signed decimal output, octal output, unsigned decimal
output, hexadecimal output, floating point output, and string output,
respectively.
Some output formats do not apply to all fields.
Floating point output only applies to timespec fields (the
.Cm a ,
.Cm m ,
and
.Cm c
fields).
.Pp
The special output specifier
.Cm S
may be used to indicate that the output, if
applicable, should be in string format.
May be used in combination with
.Bl -tag -width Ds
.It Cm amc
Display date in
.Xr strftime 3
format.
.It Cm dr
Display actual device name.
.It Cm gu
Display group or user name.
.It Cm p
Display the mode of
.Ar file
as in
.Ic ls -lTd .
.It Cm N
Displays the name of
.Ar file .
.It Cm T
Displays the type of
.Ar file .
.It Cm Y
Insert a
.Dq "\ ->\ "
into the output.
Note that the default output format
for
.Cm Y
is a string, but if specified explicitly, these four characters are
prepended.
.El
.It Cm sub
An optional sub field specifier (high, middle, low).
Only applies to
the
.Cm p ,
.Cm d ,
.Cm r ,
and
.Cm T
output formats.
It can be one of the following:
.Bl -tag -width Ds
.It Cm H
High \(em specifies the major number for devices from
.Cm r
or
.Cm d ,
the user bits for permissions from the string form of
.Cm p ,
the file type bits from the numeric forms of
.Cm p ,
and the long output form of
.Cm T .
.It Cm L
Low \(em specifies the minor number for devices from
.Cm r
or
.Cm d ,
the other bits for permissions from the string form of
.Cm p ,
the user, group, and other bits from the numeric forms of
.Cm p ,
and the
.Ic ls -F
style output character for file type when used with
.Cm T
(the use of
.Cm L
for this is optional).
.It Cm M
Middle \(em specifies the group bits for permissions from the
string output form of
.Cm p ,
or the
suid, sgid, and sticky bits for the numeric forms of
.Cm p .
.El
.It Cm datum
A required field specifier, being one of the following:
.Bl -tag -width Ds
.It Cm d
Device upon which
.Ar file
resides
.Pq Fa st_dev .
.It Cm i
.Ar file Ns 's
inode number
.Pq Fa st_ino .
.It Cm p
File type and permissions
.Pq Fa st_mode .
.It Cm l
Number of hard links to
.Ar file
.Pq Fa st_nlink .
.It Cm u , g
User-id and group-id of
.Ar file Ns 's
owner
.Pq Fa st_uid , st_gid .
.It Cm r
Device number for character and block device special files
.Pq Fa st_rdev .
.It Cm a , m , c , B
The time
.Ar file
was last accessed or modified, or when the inode was last changed, or
the birth time of the inode
.Pq Fa st_atime , st_mtime , st_ctime , st_birthtime .
If the file system does not support birth time, the value is undefined.
.It Cm z
The size of
.Ar file
in bytes
.Pq Fa st_size .
.It Cm b
Number of blocks allocated for
.Ar file
.Pq Fa st_blocks .
.It Cm k
Optimal file system I/O operation block size
.Pq Fa st_blksize .
.It Cm f
User defined flags for
.Ar file
.Pq Fa st_flags .
.It Cm v
Inode generation number
.Pq Fa st_gen .
.El
.Pp
The following four field specifiers are not drawn directly from the
data in struct stat, but are:
.Bl -tag -width Ds
.It Cm N
The name of the file.
.It Cm T
The file type, either as in
.Ic ls -F
or in a more descriptive form if the sub field specifier
.Cm H
is given.
.It Cm Y
The target of a symbolic link.
.It Cm Z
Expands to
.Ar major , Ns Ar minor
from the rdev field for character or block
special devices and gives size output for all others.
.El
.El
.Pp
Only the
.Cm %
and the field specifier are required.
Most field specifiers default to
.Cm U
as an output form, with the
exception of
.Cm p
which defaults to
.Cm O ;
.Cm a , m ,
and
.Cm c
which default to
.Cm D ;
and
.Cm Y , T ,
and
.Cm N ,
which default to
.Cm S .
.Sh EXIT STATUS
.Ex -std stat
.Sh EXAMPLES
Given a symbolic link
.Pa foo
that points from
.Pa /tmp/foo
to
.Pa / ,
you would use
.Nm
as follows:
.Bd -literal -offset indent
\*(Gt stat -F /tmp/foo
lrwxrwxrwx 1 jschauma cs 1 Apr 24 16:37:28 2002 /tmp/foo@ -\*(Gt /

\*(Gt stat -LF /tmp/foo
drwxr-xr-x 16 root wheel 512 Apr 19 10:57:54 2002 /tmp/foo/
.Ed
.Pp
To initialize some shell-variables, you could use the
.Fl s
flag as follows:
.Bd -literal -offset indent
\*(Gt csh
% eval set `stat -s .cshrc`
% echo $st_size $st_mtime
1148 1015432481

\*(Gt sh
$ eval $(stat -s .profile)
$ echo $st_size $st_mtime
1148 1015432481
.Ed
.Pp
In order to get a list of the kind of files including files pointed to if the
file is a symbolic link, you could use the following format:
.Bd -literal -offset indent
$ stat -f "%N: %HT%SY" /tmp/*
/tmp/bar: Symbolic Link -\*(Gt /tmp/foo
/tmp/output25568: Regular File
/tmp/blah: Directory
/tmp/foo: Symbolic Link -\*(Gt /
.Ed
.Pp
In order to get a list of the devices, their types and the major and minor
device numbers, formatted with tabs and linebreaks, you could use the
following format:
.Bd -literal -offset 4n
stat -f "Name: %N%n%tType: %HT%n%tMajor: %Hr%n%tMinor: %Lr%n%n" /dev/*
[...]
Name: /dev/xfs0
        Type: Character Device
        Major: 51
        Minor: 0

Name: /dev/zero
        Type: Character Device
        Major: 2
        Minor: 12
.Ed
.Pp
In order to determine the permissions set on a file separately, you could use
the following format:
.Bd -literal -offset indent
\*(Gt stat -f "%Sp -\*(Gt owner=%SHp group=%SMp other=%SLp" .
drwxr-xr-x -\*(Gt owner=rwx group=r-x other=r-x
.Ed
.Pp
In order to determine the three files that have been modified most recently,
you could use the following format:
.Bd -literal -offset indent
\*(Gt stat -f "%m%t%Sm %N" /tmp/* | sort -rn | head -3 | cut -f2-
Apr 25 11:47:00 2002 /tmp/blah
Apr 25 10:36:34 2002 /tmp/bar
Apr 24 16:47:35 2002 /tmp/foo
.Ed
.Sh SEE ALSO
.Xr file 1 ,
.Xr ls 1 ,
.Xr readlink 1 ,
.Xr lstat 2 ,
.Xr readlink 2 ,
.Xr stat 2 ,
.Xr printf 3 ,
.Xr strftime 3
.Sh HISTORY
A
.Nm
utility first appeared in
.At v1
but disappeared after
.At v4 .
It reappeared in
.Nx 1.6
and has been available since
.Ox 3.8 .
.Sh AUTHORS
.An -nosplit
The
.Nm
utility was written by
.An Andrew Brown Aq Mt atatat@NetBSD.org .
This man page was written by
.An Jan Schaumann Aq Mt jschauma@NetBSD.org .