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I miss the days of knowing who last touched every source file and precisely what version it was: $ what /usr/bin/file
/usr/bin/file:
PROGRAM:file PROJECT:file-106
$File: apprentice.c,v 1.309 2021/09/24 13:59:19 christos Exp $
$File: apptype.c,v 1.14 2018/09/09 20:33:28 christos Exp $
$File: ascmagic.c,v 1.109 2021/02/05 23:01:40 christos Exp $
$File: buffer.c,v 1.8 2020/02/16 15:52:49 christos Exp $
$File: cdf_time.c,v 1.19 2019/03/12 20:43:05 christos Exp $
$File: cdf.c,v 1.120 2021/09/24 13:59:19 christos Exp $
$File: compress.c,v 1.129 2020/12/08 21:26:00 christos Exp $
$File: der.c,v 1.21 2020/06/15 00:58:10 christos Exp $
$File: encoding.c,v 1.32 2021/04/27 19:37:14 christos Exp $
$File: fsmagic.c,v 1.81 2019/07/16 13:30:32 christos Exp $
$File: funcs.c,v 1.122 2021/06/30 10:08:48 christos Exp $
$File: is_csv.c,v 1.6 2020/08/09 16:43:36 christos Exp $
$File: is_json.c,v 1.15 2020/06/07 19:05:47 christos Exp $
$File: is_tar.c,v 1.44 2019/02/20 02:35:27 christos Exp $
$File: magic.c,v 1.115 2021/09/20 17:45:41 christos Exp $
$File: print.c,v 1.89 2021/06/30 10:08:48 christos Exp $
$File: readcdf.c,v 1.74 2019/09/11 15:46:30 christos Exp $
$File: readelf.c,v 1.178 2021/06/30 10:08:48 christos Exp $
$File: softmagic.c,v 1.315 2021/09/03 13:17:52 christos Exp $
$File: file.c,v 1.190 2021/09/24 14:14:26 christos Exp $
...
WHAT(1) General Commands Manual WHAT(1)
NAME
what - show what versions of object modules were used to construct a file
SYNOPSIS
what [-qs] [file ...]
DESCRIPTION
The what utility searches each specified file for sequences of the form
"@(#)" as inserted by the SCCS source code control system. It prints the
remainder of the string following this marker, up to a NUL character,
newline, double quote, `>' character, or backslash.
The following options are available:
-q Only output the match text, rather than formatting it.
-s Stop searching each file after the first match.
EXIT STATUS
Exit status is 0 if any matches were found, otherwise 1.
SEE ALSO
ident(1), strings(1)
STANDARDS
The what utility conforms to IEEE Std 1003.1-2001 ("POSIX.1"). The -q
option is a non-standard FreeBSD extension which may not be available on
other operating systems.
HISTORY
The what command appeared in 4.0BSD.
BUGS
This is a rewrite of the SCCS command of the same name, and behavior may
not be identical.
macOS 26.4 December 14, 2006 macOS 26.4
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