===================================================================
RCS file: /cvsrepo/anoncvs/cvs/src/usr.bin/file/file.1,v
retrieving revision 1.29
retrieving revision 1.30
diff -c -r1.29 -r1.30
*** src/usr.bin/file/file.1	2009/08/16 09:41:08	1.29
--- src/usr.bin/file/file.1	2009/10/26 21:03:03	1.30
***************
*** 1,4 ****
! .\" $OpenBSD: file.1,v 1.29 2009/08/16 09:41:08 sobrado Exp $
  .\" $FreeBSD: src/usr.bin/file/file.1,v 1.16 2000/03/01 12:19:39 sheldonh Exp $
  .\"
  .\" Copyright (c) Ian F. Darwin 1986-1995.
--- 1,4 ----
! .\" $OpenBSD: file.1,v 1.30 2009/10/26 21:03:03 ajacoutot Exp $
  .\" $FreeBSD: src/usr.bin/file/file.1,v 1.16 2000/03/01 12:19:39 sheldonh Exp $
  .\"
  .\" Copyright (c) Ian F. Darwin 1986-1995.
***************
*** 27,87 ****
  .\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  .\" SUCH DAMAGE.
  .\"
! .Dd $Mdocdate: August 16 2009 $
  .Dt FILE 1
  .Os
  .Sh NAME
  .Nm file
  .Nd determine file type
  .Sh SYNOPSIS
! .Nm file
! .Op Fl bckLNnrsvz
  .Op Fl F Ar separator
  .Op Fl f Ar namefile
  .Op Fl m Ar magicfiles
! .Bk -words
! .Ar
  .Ek
- .Nm file
- .Op Fl m Ar magicfiles
- .Fl C
  .Sh DESCRIPTION
  The
  .Nm
! utility
! tests each argument in an attempt to classify it.
  There are three sets of tests, performed in this order:
! filesystem tests, magic number tests, and language tests.
  The first test that succeeds causes the file type to be printed.
  .Pp
  The type printed will usually contain one of the words
! .Dq text
  (the file contains only
! .Tn ASCII
  characters and is probably safe to read on an
! .Tn ASCII
! terminal),
! .Dq executable
  (the file contains the result of compiling a program
  in a form understandable to some
  .Ux
  kernel or another),
  or
! .Dq data
! meaning anything else (data is usually binary or non-printable).
! .Pp
  Exceptions are well-known file formats (core files, tar archives)
  that are known to contain binary data.
! When modifying the file
! .Pa /etc/magic
! or the program itself,
! .Em "preserve these keywords" .
! .Pp
! People depend on knowing that all the readable files in a directory
  have the word
  .Dq text
  printed.
! Don't do as Berkeley did; change
  .Dq shell commands text
  to
  .Dq shell script .
--- 27,83 ----
  .\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  .\" SUCH DAMAGE.
  .\"
! .Dd $Mdocdate: October 26 2009 $
  .Dt FILE 1
  .Os
  .Sh NAME
  .Nm file
  .Nd determine file type
  .Sh SYNOPSIS
! .Nm
! .Bk -words
! .Op Fl 0bCcehikLNnprsvz
! .Op Fl -help
! .Op Fl -mime-encoding
! .Op Fl -mime-type
  .Op Fl F Ar separator
  .Op Fl f Ar namefile
  .Op Fl m Ar magicfiles
! .Ar file
  .Ek
  .Sh DESCRIPTION
  The
  .Nm
! utility tests each argument in an attempt to classify it.
  There are three sets of tests, performed in this order:
! filesystem tests, magic tests, and language tests.
  The first test that succeeds causes the file type to be printed.
  .Pp
  The type printed will usually contain one of the words
! .Em text
  (the file contains only
! printing characters and a few common control
  characters and is probably safe to read on an
! ASCII terminal),
! .Em executable
  (the file contains the result of compiling a program
  in a form understandable to some
  .Ux
  kernel or another),
  or
! .Em data
! meaning anything else (data is usually
! .Dq binary
! or non-printable).
  Exceptions are well-known file formats (core files, tar archives)
  that are known to contain binary data.
! When modifying magic files or the program itself, make sure to
! .Em preserve these keywords .
! Users depend on knowing that all the readable files in a directory
  have the word
  .Dq text
  printed.
! Don't do as Berkeley did and change
  .Dq shell commands text
  to
  .Dq shell script .
***************
*** 91,113 ****
  system call.
  The program checks to see if the file is empty,
  or if it's some sort of special file.
! Any known file types appropriate to the system you are running on
! (sockets, symbolic links, or named pipes (FIFOs) on those systems that
! implement them)
  are intuited if they are defined in
  the system header file
  .Aq Pa sys/stat.h .
  .Pp
! The magic number tests are used to check for files with data in
  particular fixed formats.
  The canonical example of this is a binary executable (compiled program)
! .Pa a.out
! file, whose format is defined in
! .Aq Pa a.out.h
  and possibly
  .Aq Pa exec.h
! in the standard include directory and is explained in
! .Xr a.out 5 .
  These files have a
  .Dq magic number
  stored in a particular place
--- 87,107 ----
  system call.
  The program checks to see if the file is empty,
  or if it's some sort of special file.
! Any known file types,
! such as sockets, symbolic links, and named pipes (FIFOs),
  are intuited if they are defined in
  the system header file
  .Aq Pa sys/stat.h .
  .Pp
! The magic tests are used to check for files with data in
  particular fixed formats.
  The canonical example of this is a binary executable (compiled program)
! a.out file, whose format is defined in
! .Aq Pa elf.h ,
! .Aq Pa a.out.h ,
  and possibly
  .Aq Pa exec.h
! in the standard include directory.
  These files have a
  .Dq magic number
  stored in a particular place
***************
*** 115,172 ****
  .Ux
  operating system
  that the file is a binary executable, and which of several types thereof.
! .Pp
! The concept of magic number has been applied by extension to data files.
  Any file with some invariant identifier at a small fixed
  offset into the file can usually be described in this way.
! The information in these files is read from the magic file
  .Pa /etc/magic .
  .Pp
! If an argument appears to be an
! .Tn ASCII
! file,
  .Nm
! attempts to guess its language.
! The language tests look for particular strings (cf
! .Pa names.h )
  that can appear anywhere in the first few blocks of a file.
  For example, the keyword
  .Em .br
  indicates that the file is most likely a
  .Xr troff 1
  input file, just as the keyword
! .Li struct
  indicates a C program.
  These tests are less reliable than the previous
  two groups, so they are performed last.
  The language test routines also test for some miscellany
  (such as
  .Xr tar 1
! archives) and determine whether an unknown file should be
! labelled as
! .Dq ASCII text
! or
! .Dq data .
  .Pp
! The options are as follows:
! .Bl -tag -width Ds
! .It Fl b
  Do not prepend filenames to output lines (brief mode).
! .It Fl C
! For each magic number file, write a
  .Pa magic.mgc
! output file that contains a preparsed (compiled) version of it.
! .It Fl c
  Cause a checking printout of the parsed form of the magic file.
! This is usually used in conjunction with
  .Fl m
! to debug a new magic file before installing it.
! .It Fl F Ar separator
! Use the specified string as the separator between the filename and
! the file result returned.
  Defaults to
  .Sq \&: .
! .It Fl f Ar namefile
  Read the names of the files to be examined from
  .Ar namefile
  (one per line)
--- 109,232 ----
  .Ux
  operating system
  that the file is a binary executable, and which of several types thereof.
! The concept of a
! .Dq magic
! has been applied by extension to data files.
  Any file with some invariant identifier at a small fixed
  offset into the file can usually be described in this way.
! The information identifying these files is read from the magic file
  .Pa /etc/magic .
+ In addition, if
+ .Pa $HOME/.magic.mgc
+ or
+ .Pa $HOME/.magic
+ exists, it will be used in preference to the system magic files.
  .Pp
! If a file does not match any of the entries in the magic file,
! it is examined to see if it seems to be a text file.
! ASCII, ISO-8859-x, non-ISO 8-bit extended-ASCII character sets
! (such as those used on Macintosh and IBM PC systems),
! UTF-8-encoded Unicode, UTF-16-encoded Unicode, and EBCDIC
! character sets can be distinguished by the different
! ranges and sequences of bytes that constitute printable text
! in each set.
! If a file passes any of these tests, its character set is reported.
! ASCII, ISO-8859-x, UTF-8, and extended-ASCII files are identified
! as
! .Dq text
! because they will be mostly readable on nearly any terminal;
! UTF-16 and EBCDIC are only
! .Dq character data
! because, while
! they contain text, it is text that will require translation
! before it can be read.
! In addition,
  .Nm
! will attempt to determine other characteristics of text-type files.
! If the lines of a file are terminated by CR, CRLF, or NEL, instead
! of the Unix-standard LF, this will be reported.
! Files that contain embedded escape sequences or overstriking
! will also be identified.
! .Pp
! Once
! .Nm
! has determined the character set used in a text-type file,
! it will
! attempt to determine in what language the file is written.
! The language tests look for particular strings (cf.\&
! .Aq Pa names.h )
  that can appear anywhere in the first few blocks of a file.
  For example, the keyword
  .Em .br
  indicates that the file is most likely a
  .Xr troff 1
  input file, just as the keyword
! .Em struct
  indicates a C program.
  These tests are less reliable than the previous
  two groups, so they are performed last.
  The language test routines also test for some miscellany
  (such as
  .Xr tar 1
! archives).
  .Pp
! Any file that cannot be identified as having been written
! in any of the character sets listed above is simply said to be
! .Dq data .
! .Sh OPTIONS
! .Bl -tag -width indent
! .It Fl 0 , -print0
! Output a null character
! .Sq \e0
! after the end of the filename.
! Nice to
! .Xr cut 1
! the output.
! This does not affect the separator which is still printed.
! .It Fl b , -brief
  Do not prepend filenames to output lines (brief mode).
! .It Fl C , -compile
! Write a
  .Pa magic.mgc
! output file that contains a pre-parsed version of the magic file or directory.
! .It Fl c , -checking-printout
  Cause a checking printout of the parsed form of the magic file.
! This is usually used in conjunction with the
  .Fl m
! flag to debug a new magic file before installing it.
! .It Fl e , -exclude Ar testname
! Exclude the test named in
! .Ar testname
! from the list of tests made to determine the file type.
! Valid test names are:
! .Bl -tag -width
! .It apptype
! Check for
! .Dv EMX
! application type (only on EMX).
! .It ascii
! Check for various types of ASCII files.
! .It compress
! Don't look for, or inside, compressed files.
! .It elf
! Don't print elf details.
! .It fortran
! Don't look for fortran sequences inside ASCII files.
! .It soft
! Don't consult magic files.
! .It tar
! Don't examine tar files.
! .It token
! Don't look for known tokens inside ASCII files.
! .It troff
! Don't look for troff sequences inside ASCII files.
! .El
! .It Fl F , -separator Ar separator
! Use the specified string as the separator between the filename and the
! file result returned.
  Defaults to
  .Sq \&: .
! .It Fl f , -files-from Ar namefile
  Read the names of the files to be examined from
  .Ar namefile
  (one per line)
***************
*** 177,211 ****
  to test the standard input, use
  .Sq -
  as a filename argument.
! .It Fl k
  Don't stop at the first match, keep going.
! .It Fl L
! Cause symlinks to be followed, as the like-named option in
! .Xr ls 1
! (on systems that support symbolic links).
! .It Fl m Ar magicfiles
! Specify an alternate list,
! .Ar magicfiles ,
! of files containing magic numbers.
! This can be a single file or a colon-separated list of files.
! If a compiled magic file is found alongside, it will be used instead.
! .It Fl N
  Don't pad filenames so that they align in the output.
! .It Fl n
! Force
! .Em stdout
! to be flushed after checking each file.
  This is only useful if checking a list of files.
! It is intended to be used by programs that want filetype output from a
! pipe.
! .It Fl r
! Don't translate unprintable characters to
! .Sq \e Ns Em ooo .
  Normally
  .Nm
! translates unprintable characters to their octal representation
! (raw mode).
! .It Fl s
  Normally,
  .Nm
  only attempts to read and determine the type of argument files which
--- 237,310 ----
  to test the standard input, use
  .Sq -
  as a filename argument.
! .It Fl h , -no-dereference
! Causes symlinks not to be followed.
! This is the default if the environment variable
! .Dv POSIXLY_CORRECT
! is not defined.
! .It Fl -help
! Print a help message and exit.
! .It Fl i , -mime
! Causes the file command to output mime type strings rather than the more
! traditional human readable ones.
! Thus it may say
! .Dq text/plain charset=us-ascii
! rather than
! .Dq ASCII text .
! In order for this option to work,
! .Nm
! changes the way it handles files recognized by the command itself
! (such as many of the text file types, directories etc.),
! and makes use of an alternative
! .Dq magic
! file.
! See also
! .Sx FILES ,
! below.
! .It Fl -mime-encoding , -mime-type
! Like
! .Fl i ,
! but print only the specified element(s).
! .It Fl k , -keep-going
  Don't stop at the first match, keep going.
! Subsequent matches will have the string
! .Dq "\[rs]012\- "
! prepended.
! (If a newline is required, see the
! .Fl r
! option.)
! .It Fl L , -dereference
! Causes symlinks to be followed;
! analogous to the option of the same name in
! .Xr ls 1 .
! This is the default if the environment variable
! .Dv POSIXLY_CORRECT
! is defined.
! .It Fl m , -magic-file Ar magicfiles
! Specify an alternate list of files and directories containing magic.
! This can be a single item, or a colon-separated list.
! If a compiled magic file is found alongside a file or directory,
! it will be used instead.
! .It Fl N , -no-pad
  Don't pad filenames so that they align in the output.
! .It Fl n , -no-buffer
! Force stdout to be flushed after checking each file.
  This is only useful if checking a list of files.
! It is intended to be used by programs that want filetype output from a pipe.
! .It Fl p , -preserve-date
! On systems that support
! .Xr utime 3
! or
! .Xr utimes 2 ,
! attempt to preserve the access time of files analyzed, to pretend that
! .Nm
! never read them.
! .It Fl r , -raw
! Don't translate unprintable characters to \eooo.
  Normally
  .Nm
! translates unprintable characters to their octal representation.
! .It Fl s , -special-files
  Normally,
  .Nm
  only attempts to read and determine the type of argument files which
***************
*** 223,315 ****
  This option also causes
  .Nm
  to disregard the file size as reported by
! .Xr stat 2 ,
  since on some systems it reports a zero size for raw disk partitions.
! .It Fl v
  Print the version of the program and exit.
! .It Fl z
! Try to look inside files that have been run through
! .Xr compress 1 .
  .El
  .Sh ENVIRONMENT
! .Bl -tag -width indent
! .It Ev MAGIC
! Default magic number files, separated by colon characters.
  .Nm
  adds
  .Dq .mgc
  to the value of this variable as appropriate.
! .El
  .Sh FILES
  .Bl -tag -width /etc/magic -compact
  .It Pa /etc/magic
  default list of magic numbers
  .El
  .Sh SEE ALSO
- .Xr compress 1 ,
  .Xr hexdump 1 ,
- .Xr ls 1 ,
  .Xr od 1 ,
  .Xr strings 1 ,
- .Xr a.out 5 ,
  .Xr magic 5
  .Sh STANDARDS CONFORMANCE
  This program is believed to exceed the System V Interface Definition
  of FILE(CMD), as near as one can determine from the vague language
  contained therein.
! Its behaviour is mostly compatible with the System V program of the same name.
  This version knows more magic, however, so it will produce
  different (albeit more accurate) output in many cases.
  .Pp
  The one significant difference
  between this version and System V
! is that this version treats any white space
  as a delimiter, so that spaces in pattern strings must be escaped.
  For example,
  .Pp
- >10     string  language impress\       (imPRESS data)
- .Pp
  in an existing magic file would have to be changed to
  .Pp
- >10     string  language\e impress      (imPRESS data)
- .Pp
  In addition, in this version, if a pattern string contains a backslash,
  it must be escaped.
  For example
  .Pp
- 0       string          \ebegindata     Andrew Toolkit document
- .Pp
  in an existing magic file would have to be changed to
  .Pp
- 0       string          \e\ebegindata   Andrew Toolkit document
- .Pp
  SunOS releases 3.2 and later from Sun Microsystems include a
! .Nm file
  command derived from the System V one, but with some extensions.
! My version differs from Sun's only in minor ways.
  It includes the extension of the
! .Ql &
  operator, used as,
  for example,
! .Pp
! >16     long&0x7fffffff >0              not stripped
! .Sh MAGIC DIRECTORY
! The magic file entries have been collected from various sources,
! mainly USENET, and contributed by various authors.
! .An Christos Zoulas
! (address below) will collect additional
! or corrected magic file entries.
! A consolidation of magic file entries
! will be distributed periodically.
! The order of entries in the magic file is significant.
! Depending on what system you are using, the order that
! they are put together may be incorrect.
! If your old
! .Nm
! command uses a magic file,
! keep the old magic file around for comparison purposes
! (rename it to
! .Pa /etc/magic.orig ) .
  .Sh HISTORY
  There has been a
  .Nm
--- 322,417 ----
  This option also causes
  .Nm
  to disregard the file size as reported by
! .Xr stat 2
  since on some systems it reports a zero size for raw disk partitions.
! .It Fl v , -version
  Print the version of the program and exit.
! .It Fl z , -uncompress
! Try to look inside compressed files.
  .El
+ .Pp
+ .Ex -std file
  .Sh ENVIRONMENT
! The environment variable
! .Dv MAGIC
! can be used to set the default magic file name.
! If that variable is set, then
  .Nm
+ will not attempt to open
+ .Pa $HOME/.magic .
+ .Nm
  adds
  .Dq .mgc
  to the value of this variable as appropriate.
! The environment variable
! .Dv POSIXLY_CORRECT
! controls whether
! .Nm
! will attempt to follow symlinks or not.
! If set, then
! .Nm
! follows symlinks; otherwise it does not.
! This is also controlled by the
! .Fl L
! and
! .Fl h
! options.
  .Sh FILES
  .Bl -tag -width /etc/magic -compact
  .It Pa /etc/magic
  default list of magic numbers
  .El
  .Sh SEE ALSO
  .Xr hexdump 1 ,
  .Xr od 1 ,
  .Xr strings 1 ,
  .Xr magic 5
  .Sh STANDARDS CONFORMANCE
  This program is believed to exceed the System V Interface Definition
  of FILE(CMD), as near as one can determine from the vague language
  contained therein.
! Its behavior is mostly compatible with the System V program of the same name.
  This version knows more magic, however, so it will produce
  different (albeit more accurate) output in many cases.
+ .\" URL: http://www.opengroup.org/onlinepubs/009695399/utilities/file.html
  .Pp
  The one significant difference
  between this version and System V
! is that this version treats any whitespace
  as a delimiter, so that spaces in pattern strings must be escaped.
  For example,
+ .Bd -literal -offset indent
+ \*(Gt10	string	language impress\ 	(imPRESS data)
+ .Ed
  .Pp
  in an existing magic file would have to be changed to
+ .Bd -literal -offset indent
+ \*(Gt10	string	language\e impress	(imPRESS data)
+ .Ed
  .Pp
  In addition, in this version, if a pattern string contains a backslash,
  it must be escaped.
  For example
+ .Bd -literal -offset indent
+ 0	string		\ebegindata	Andrew Toolkit document
+ .Ed
  .Pp
  in an existing magic file would have to be changed to
+ .Bd -literal -offset indent
+ 0	string		\e\ebegindata	Andrew Toolkit document
+ .Ed
  .Pp
  SunOS releases 3.2 and later from Sun Microsystems include a
! .Nm
  command derived from the System V one, but with some extensions.
! This version differs from Sun's only in minor ways.
  It includes the extension of the
! .Sq &
  operator, used as,
  for example,
! .Bd -literal -offset indent
! \*(Gt16	long&0x7fffffff	\*(Gt0		not stripped
! .Ed
  .Sh HISTORY
  There has been a
  .Nm
***************
*** 318,434 ****
  since at least Research Version 4
  (man page dated November, 1973).
  The System V version introduced one significant major change:
! the external list of magic number types.
  This slowed the program down slightly but made it a lot more flexible.
  .Pp
! This program, based on the System V version, was written by
! .An Ian F. Darwin
  without looking at anybody else's source code.
  .Pp
! .An John Gilmore
! revised the code extensively, making it better than
  the first version.
! .An Geoff Collyer
! found several inadequacies
  and provided some magic file entries.
! Contributions to the
! .Ql &
! operator by
! .An Rob McMahon ,
! 1989.
  .Pp
! .An Guy Harris
! made many changes from 1993 to the present.
  .Pp
  Primary development and maintenance from 1990 to the present by
! .An Christos Zoulas Aq christos@zoulas.com .
  .Pp
! Altered by
! .An Chris Lowth ,
! 2000, to optionally report MIME types.
! This required an alternative magic file, and is not available in
! .Ox .
  .Pp
! Altered by
! .An Eric Fischer ,
! July, 2000, to identify character codes and attempt to identify the
! languages of non-ASCII files.
  .Pp
  The list of contributors to the
! .Dq magdir
! directory (source for the
! .Pa /etc/magic
! file) is too long to include here.
  You know who you are; thank you.
! .Sh LEGAL NOTICE
! Copyright (c) Ian F. Darwin, Toronto, Canada, 1986-1999.
! Covered by the standard Berkeley Software Distribution copyright; see the file
! LEGAL.NOTICE in the distribution.
! .Pp
! The files
! .Pa tar.h
! and
! .Pa is_tar.c
! were written by
! .An John Gilmore
! from his public-domain
! .Nm tar
! program, and are not covered by the above license.
  .Sh BUGS
  There must be a better way to automate the construction of the Magic
  file from all the glop in Magdir.
  What is it?
- Better yet, the magic file should be compiled into binary (say,
- .Xr ndbm 3
- or, better yet, fixed-length
- .Tn ASCII
- strings for use in heterogenous network environments) for faster startup.
- Then the program would run as fast as the Version 7 program of the same name,
- with the flexibility of the System V version.
  .Pp
  .Nm
! uses several algorithms that favor speed over accuracy;
  thus it can be misled about the contents of
! .Tn ASCII
  files.
  .Pp
! The support for
! .Tn ASCII
! files (primarily for programming languages)
  is simplistic, inefficient and requires recompilation to update.
  .Pp
- There should be an
- .Dq else
- clause to follow a series of continuation lines.
- .Pp
- The magic file and keywords should have regular expression support.
- Their use of
- .Tn ASCII TAB
- as a field delimiter is ugly and makes
- it hard to edit the files, but is entrenched.
- .Pp
- It might be advisable to allow upper-case letters in keywords
- for e.g.,
- .Xr troff 1
- commands vs man page macros.
- Regular expression support would make this easy.
- .Pp
- The program doesn't grok \s-2FORTRAN\s0.
- It should be able to figure \s-2FORTRAN\s0 by seeing some keywords which
- appear indented at the start of line.
- Regular expression support would make this easy.
- .Pp
  The list of keywords in
! .Em ascmagic
  probably belongs in the Magic file.
  This could be done by using some keyword like
! .Ql *
  for the offset value.
  .Pp
- Another optimization would be to sort
- the magic file so that we can just run down all the
- tests for the first byte, first word, first long, etc, once we
- have fetched it.
  Complain about conflicts in the magic file entries.
  Make a rule that the magic entries sort based on file offset rather
  than position within the magic file?
--- 420,485 ----
  since at least Research Version 4
  (man page dated November, 1973).
  The System V version introduced one significant major change:
! the external list of magic types.
  This slowed the program down slightly but made it a lot more flexible.
  .Pp
! This program, based on the System V version,
! was written by Ian Darwin
  without looking at anybody else's source code.
  .Pp
! John Gilmore revised the code extensively, making it better than
  the first version.
! Geoff Collyer found several inadequacies
  and provided some magic file entries.
! Contributions by the `&' operator by Rob McMahon, 1989.
  .Pp
! Guy Harris, made many changes from 1993 to the present.
  .Pp
  Primary development and maintenance from 1990 to the present by
! Christos Zoulas.
  .Pp
! Altered by Chris Lowth, 2000:
! Handle the
! .Fl i
! option to output mime type strings, using an alternative
! magic file and internal logic.
  .Pp
! Altered by Eric Fischer, July, 2000,
! to identify character codes and attempt to identify the languages
! of non-ASCII files.
  .Pp
+ Altered by Reuben Thomas, 2007 to 2008, to improve MIME
+ support and merge MIME and non-MIME magic, support directories as well
+ as files of magic, apply many bug fixes and improve the build system.
+ .Pp
  The list of contributors to the
! .Dq magic
! directory (magic files)
! is too long to include here.
  You know who you are; thank you.
! Many contributors are listed in the source files.
  .Sh BUGS
+ .Pp
  There must be a better way to automate the construction of the Magic
  file from all the glop in Magdir.
  What is it?
  .Pp
  .Nm
! uses several algorithms that favor speed over accuracy,
  thus it can be misled about the contents of
! text
  files.
  .Pp
! The support for text files (primarily for programming languages)
  is simplistic, inefficient and requires recompilation to update.
  .Pp
  The list of keywords in
! .Pa ascmagic
  probably belongs in the Magic file.
  This could be done by using some keyword like
! .Sq *
  for the offset value.
  .Pp
  Complain about conflicts in the magic file entries.
  Make a rule that the magic entries sort based on file offset rather
  than position within the magic file?
***************
*** 437,460 ****
  of
  .Dq how good
  a guess is.
! We end up removing guesses (e.g.,
! .Dq From\ \&
  as first 5 chars of file) because
! they are not as good as other guesses (e.g.,
  .Dq Newsgroups:
  versus
! .Qq Return-Path: ) .
! Still, if the others don't pan out, it should be
! possible to use the first guess.
  .Pp
- This program is slower than some vendors'
- .Nm
- commands.
- .Pp
  This manual page, and particularly this section, is too long.
- .Sh AVAILABILITY
- You can obtain the original author's latest version by anonymous FTP
- on
- .Em ftp.astron.com
- in the directory
- .Pa /pub/file/file-X.YY.tar.gz .
--- 488,501 ----
  of
  .Dq how good
  a guess is.
! We end up removing guesses (e.g.
! .Dq From\
  as first 5 chars of file) because
! they are not as good as other guesses (e.g.\&
  .Dq Newsgroups:
  versus
! .Dq Return-Path: ) .
! Still, if the others don't pan out, it should be possible to use the
! first guess.
  .Pp
  This manual page, and particularly this section, is too long.