.TH MAGIC 4 "Public Domain"
.\"
.\" Translated Wed Jan 12 23:14:34 JST 2000
.\"    by FUJIWARA Teruyoshi <fujiwara@linux.or.jp>
.\" Updated & Modified Sun Jan 14 22:02:13 JST 2001
.\"    by Yuichi SATO <sato@complex.eng.hokudai.ac.jp>
.\" Updated & Modified Sun May 25 17:08:32 JST 2003
.\"    by Yuichi SATO <ysato444@yahoo.co.jp>
.\"
.\" install as magic.4 on USG, magic.5 on V7 or Berkeley systems.
.SH ̾
magic \- file ޥѤΥޥåʥСե
.SH 
Υޥ˥奢ڡǤϡ
.BR file (1)
ޥ (С 4.12) Ѥ magic եν񼰤롣
եμĴ٤ˡϿ뤬
.B file
ޥɤϥե뤬
\fI֥ޥåʥС (magic number)\fR
ǻϤޤ뤫ɤˤäƥեμ̤롣
ե
.I /usr/share/file/magic
ǻꤹ뤳ȤϡĴ٤٤ޥåʥС
ΥޥåʥСĤäɽå
ե뤫Ф뤽¾ξǤ롣
.PP
magic եγƹԤǤϼ¹ԤƥȤꤹ롣
ƥȤǤϡեƬ鸫ΥեåȰ֤ˤǡȡ
1 ХȤޤ 2 Хȡ4 ХȤοͤʸȤӤԤ롣
ƥȤȻꤷåϤ롣
Ԥˤϰʲιܤޤޤ:
.IP offset \w'message'u+2n
Ĵ٤ǡΥեǤΰ֤ꤹ륪եåͤǡñ̤ϥХȤǤ롣
.IP type
Ĵ٤ǡηǤͤϰʲ̤Ǥ:
.RS
.IP byte \w'message'u+2n
1 Х͡
.IP short
(ۤȤɤΥƥǤ) 2 Х͡ޥΥͥƥ֤ΥХȽǤ롣
.IP long
(ۤȤɤΥƥǤ) 4 Х͡ޥΥͥƥ֤ΥХȽǤ롣
.IP string
ʸɽХ
string λǤϡץȤ /[Bbc]* ³뤳ȤǤ롣
``B'' ե饰ϡоݥեʣĤζ 1 Ĥζڤͤư
ξ硢оݥեϾʤȤ 1 ĤζޤǤɬפ롣
magic ե
.I n
ĤϢ³򤬤硢
оݥեˤϡ˥ޥå
.I n
ĤϢ³ɬפȤʤ롣
``b''ե饰ϡоݥեζ
¸ߤƤ⤷ʤƤ褤Ȥư
ˡ``c'' ե饰ϡʸʸ̤ʤޥåԤȤꤹ:
magic եξʸϡ
оݥեʸʸξ˥ޥå롣
magic եʸϡ
оݥեʸˤΤߥޥå롣
.IP date
UNIX Ȳᤵ 4 Х͡
.IP ldate
UNIX λȲᤵ 4 Х͡
 UTC ǤϤʤ륿ȤƲᤵ롣
.IP beshort
(ۤȤɤΥƥǤ) 2 Х͡ХȽϥӥåǥǤ롣
.IP belong
(ۤȤɤΥƥǤ) 4 Х͡ХȽϥӥåǥǤ롣
.IP bedate
(ۤȤɤΥƥǤ) 4 Х͡ХȽϥӥåǥǤ롣
UNIX Ȳᤵ롣
.IP leshort
(ۤȤɤΥƥǤ) 2 Х͡ХȽϥȥ륨ǥǤ롣
.IP lelong
(ۤȤɤΥƥǤ) 4 Х͡ХȽϥȥ륨ǥǤ롣
.IP ledate
(ۤȤɤΥƥǤ) 4 Х͡ХȽϥȥ륨ǥǤ롣
UNIX Ȳᤵ롣
.IP leldate
(ۤȤɤΥƥǤ) 4 Х͡ХȽϥȥ륨ǥǤ롣
UNIX λȲᤵ롣
 UTC ǤϤʤ륿ȤƲᤵ롣
.RE
.PP
ͷͤθˤ
.B &
ȿͤ񤯤ȤǤ롣ξ硢ӤԤ
.B &
θ֤ͤȤ AND 黻Ԥ롣
.B u
֤ȤǡդӤ̵ǹԤȤǤ롣
.IP test
եͤӤ͡
 C ʸȤƻꤷʸ̤˻Ȥ
(: \en ϲʸ)
.IP

ˤϡ¹Ԥưꤹʸ֤ȤǤ롣
.BR =
ꤷϡեͤϻꤷͤʤФʤʤ
.BR <
ꤷϡեͤϻꤷͤ꾮ʤФʤʤ
.BR >
ꤷϡեͤϻꤷͤ礭ʤФʤʤ
.BR &
ꤷϡꤷͤΩäƤƤΥӥåȤեͤǤ
ΩäƤʤФʤʤ
.BR ^
ꤷϡꤷͤΩäƤɤΥӥåȤ⡢
եͤΩäƤƤϤʤʤ
.BR x
Ϥɤͤˤޥå롣ʸάƤϡ
.BR =
ꤵƤȤߤʤ롣
.IP
ͤ C ν񼰤ǻꤹ롣㤨С
.B 13
 10 ʿ
.B 013
 8 ʿ
.B 0x13
 16 ʿǤ롣
.IP
ʸξ硢ե˴ޤޤХʸϡꤵ줿
Хʸ˥ޥåʤФʤʤ
黻
.BR = ,
.BR < ,
.B >
ʸˤŬѤǤ (
.B &
ŬѤǤʤ)
ޥå󥰤ԤĹϡmagic եʸĹǤ롣
Ĥޤꡢ
.B >\e0
ꤹ뤳ȤˤꡢԤɤʸˤޥå¿ʬ
ʸɽ뤳ȤǤ
.IP message
ӤȤ˽Ϥå
ʸ
.BR printf (3)
ν񼰻꤬ޤޤƤ硢Υå񼰻ʸȤƻȤä
ե (ꤵ줿ƤΥޥϼ¹Ԥ) Ϥ롣
.PP
ΥեեޥåȤǤϡեμȤȤɲþɽ롣
ʸ
.B >
ǻϤޤԤϡɲäǹԤƥȤɽå򼨤
1 Ԥ˴ޤޤ
.B >
οϥƥȤΥ٥ɽ
Ƭ
.B >
ʤԤϥ٥ 0 ˤʤ롣
٥
.IB n \(pl1
γƹԤϡmagic եǼʬˤ٥
.IB n
ιԤΤǤᤤ֤ΤΤ˽
٥
.I n
ιԤΥƥȤȡ³ƤΥ٥
.IB n \(pl1
ιԤǻꤵƤƥȤ¹Ԥ졢
ΥƥȤȥåϤ롣

.I n
äǤưϽλ롣
ľ
.B >
ľʸ
.B (
ʤС̤θʸϴܥեåͤȲᤵ롣
Ĥޤꡢ̤θοϥեǤΥեåȤȤƻȤ롣
ΥեåȰ֤ˤͤɤ߹ޤ졢
ɤ߹ޤ줿ͤեǤΥեåȤȤƻȤ롣
ܥեåͤν񼰤ϰʲǤ:
.BI (( x [.[bslBSL]][+\-][ y ]).
.I x
ͤϥեǤΥեåͤȤƻȤ롣
ΥեåȰ֤ˤ byte short long ͤɤ߹ޤ뤬
ɤηˤʤ뤫Ϸ
.B [bslBSL] 
ˤäƷޤ롣
ʸǼ뷿ϥӥåǥͤȲᤵ졢
ʸǼ뷿ϥȥ륨ǥͤȲᤵ롣
οޤ
.I y
ͤ˲ä졢η̤եΥեåͤȤƻȤ롣
ꤵƤʤΥǥեȤη long Ǥ롣
.PP
ΥեɤĹˤäƥեåͤѤ뤿ᡢ
Τʥեåͤ狼ʤ⤢롣
ξϡľξ̥٥
եɤν꤫а֤ǥեåȤǤ
(ʤ餳ˡϥ֥٥ΥƥȡĤޤ
.B >
ǻϤޤƥȤǤȤʤ)
Τ褦Хեåͤϡեåͤ
.B &
֤Ȥǻꤹ롣
.SH Х
.IR long ,
.IR belong ,
.IR lelong ,
.IR short ,
.IR beshort ,
.IR leshort ,
.IR date ,
.IR bedate ,
.I ledate
ν񼰤ϥƥ¸Ǥ롣̤եϡ
Ĺ㤦ƥफäƤ뤳Ȥ¿ᡢ
ХȤƻꤹ٤ (2B, 4B )
.PP
(Ǥ) ܥեåͤǥǥꤷ
ǡ򰷤ȤϤǤʤ
.SH Ϣ
.BR file (1)
\- Υեɤॳޥɡ
.\"
.\" From: guy@sun.uucp (Guy Harris)
.\" Newsgroups: net.bugs.usg
.\" Subject: /etc/magic's format isn't well documented
.\" Message-ID: <2752@sun.uucp>
.\" Date: 3 Sep 85 08:19:07 GMT
.\" Organization: Sun Microsystems, Inc.
.\" Lines: 136
.\" 
.\" Here's a manual page for the format accepted by the "file" made by adding
.\" the changes I posted to the S5R2 version.
.\"
.\" Modified for Ian Darwin's version of the file command.
.\" @(#)$Id: magic.man,v 1.27 2003/09/12 19:43:30 christos Exp $