commands

UNIX下FILE命令的实现源码

#------------------------------------------------------------------------------
# commands:  file(1) magic for various shells and interpreters
#
0	string		:\ shell archive or script for antique kernel text
0	string/b	#!\ /bin/sh		Bourne shell script text executable
0	string/b	#!\ /bin/csh		C shell script text executable
# korn shell magic, sent by George Wu, [e-mail]
0	string/b	#!\ /bin/ksh		Korn shell script text executable
0	string/b 	#!\ /bin/tcsh		Tenex C shell script text executable
0	string/b 	#!\ /usr/local/tcsh	Tenex C shell script text executable
0	string/b	#!\ /usr/local/bin/tcsh	Tenex C shell script text executable

#
# zsh/ash/ae/nawk/gawk magic from [e-mail] (Cameron Simpson)
0	string/b	#!\ /usr/local/bin/zsh	Paul Falstad's zsh script text executable
0	string/b	#!\ /usr/local/bin/ash	Neil Brown's ash script text executable
0	string/b	#!\ /usr/local/bin/ae	Neil Brown's ae script text executable
0	string/b	#!\ /bin/nawk		new awk script text executable
0	string/b	#!\ /usr/bin/nawk	new awk script text executable
0	string/b	#!\ /usr/local/bin/nawk	new awk script text executable
0	string/b	#!\ /bin/gawk		GNU awk script text executable
0	string/b	#!\ /usr/bin/gawk	GNU awk script text executable
0	string/b	#!\ /usr/local/bin/gawk	GNU awk script text executable
#
0	string/b	#!\ /bin/awk		awk script text executable
0	string/b	#!\ /usr/bin/awk	awk script text executable
0	string		BEGIN			awk script text

# For Larry Wall's perl language.  The ``eval'' line recognizes an
# outrageously clever hack for USG systems.
#				Keith Waclena <[e-mail]>
0	string/b	#!\ /bin/perl			perl script text executable
0	string		eval\ "exec\ /bin/perl		perl script text
0	string/b	#!\ /usr/bin/perl		perl script text executable
0	string		eval\ "exec\ /usr/bin/perl	perl script text
0	string/b	#!\ /usr/local/bin/perl		perl script text
0	string		eval\ "exec\ /usr/local/bin/perl	perl script text executable

# AT&T Bell Labs' Plan 9 shell
0	string/b	#!\ /bin/rc	Plan 9 rc shell script text executable

# bash shell magic, from Peter Tobias ([e-mail])
0	string/b	#!\ /bin/bash	Bourne-Again shell script text executable
0	string/b	#!\ /usr/local/bin/bash	Bourne-Again shell script text executable

# using env
0	string		#!/usr/bin/env		a
>15	string		>\0			%s script text executable
0	string		#!\ /usr/bin/env	a
>16	string		>\0			%s script text executable


# generic shell magic
0	string		#!\ /			a
>3	string		>\0			%s script text executable
0	string		#!\	/		a
>3	string		>\0			%s script text executable
0	string		#!/			a
>2	string		>\0			%s script text executable
0	string		#!\ 			script text executable
>3	string		>\0			for %s