mirror of
https://git.FreeBSD.org/src.git
synced 2024-12-20 11:11:24 +00:00
97 lines
3.4 KiB
Plaintext
97 lines
3.4 KiB
Plaintext
.\" Copyright (c) 1980, 1990, 1993
|
|
.\" The Regents of the University of California. All rights reserved.
|
|
.\"
|
|
.\" 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.
|
|
.\" 3. All advertising materials mentioning features or use of this software
|
|
.\" must display the following acknowledgement:
|
|
.\" This product includes software developed by the University of
|
|
.\" California, Berkeley and its contributors.
|
|
.\" 4. Neither the name of the University nor the names of its contributors
|
|
.\" may be used to endorse or promote products derived from this software
|
|
.\" without specific prior written permission.
|
|
.\"
|
|
.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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.
|
|
.\"
|
|
.\" @(#)strings.1 8.1 (Berkeley) 6/6/93
|
|
.\"
|
|
.Dd June 6, 1993
|
|
.Dt STRINGS 1
|
|
.Os BSD 3
|
|
.Sh NAME
|
|
.Nm strings
|
|
.Nd find printable strings in a file
|
|
.Sh SYNOPSIS
|
|
.Nm strings
|
|
.Op Fl afo
|
|
.Op Fl n Ar number
|
|
.Op Ar file ...
|
|
.Sh DESCRIPTION
|
|
.Nm Strings
|
|
displays the sequences of printable characters in each of the specified
|
|
files, or in the standard input, by default.
|
|
By default, a sequence must be at least four characters in length
|
|
before being displayed.
|
|
.Pp
|
|
The options are as follows:
|
|
.Bl -tag -width Ds
|
|
.It Fl a
|
|
By default,
|
|
.Nm strings
|
|
only searches the text and data segments of object files.
|
|
The
|
|
.Fl a
|
|
option causes
|
|
.Nm strings
|
|
to search the entire object file.
|
|
.It Fl f
|
|
Each string is preceded by the name of the file
|
|
in which it was found.
|
|
.It Fl n
|
|
Specifies the minimum number of characters in a sequence to be
|
|
.Ar number ,
|
|
instead of four.
|
|
.It Fl o
|
|
Each string is preceded by its decimal offset in the
|
|
file.
|
|
.El
|
|
.Pp
|
|
.Nm Strings
|
|
is useful for identifying random binaries, among other things.
|
|
.Sh SEE ALSO
|
|
.Xr hexdump 1
|
|
.Sh BUGS
|
|
The algorithm for identifying strings is extremely primitive.
|
|
In particular, machine code instructions on certain architectures
|
|
can resemble sequences of ASCII bytes, which
|
|
will fool the algorithm.
|
|
.Sh COMPATIBILITY
|
|
Historic implementations of
|
|
.Nm
|
|
only search the initialized data portion of the object file.
|
|
This was reasonable as strings were normally stored there.
|
|
Given new compiler technology which installs strings in the
|
|
text portion of the object file, the default behavior was
|
|
changed.
|
|
.Sh HISTORY
|
|
The
|
|
.Nm
|
|
command appeared in
|
|
.Bx 3.0 .
|