Subversion Repositories planix.SVN

Rev

Details | Last modification | View Log | RSS feed

Rev Author Line No. Line
2 - 1 
.TH FILE 1
2 
.SH NAME
3 
file \- determine file type
4 
.SH SYNOPSIS
5 
.B file
6 
[
7 
.B -m
8 
]
9 
[
10 
.I file
11 
\&...
12 
]
13 
.SH DESCRIPTION
14 
.I File
15 
performs a series of tests on its argument
16 
.I files
17 
in an attempt to classify their contents by language or purpose.
18 
If no arguments are given, the classification is performed
19 
on standard input.
20 
.PP
21 
If the
22 
.B -m
23 
flag is given,
24 
.I file
25 
outputs an
26 
appropriate MIME
27 
.B Content-Type
28 
specification describing the
29 
.B type
30 
and
31 
.B subtype
32 
of each file.
33 
.PP
34 
The file types it looks for include
35 
directory,
36 
device file,
37 
zero-filled file,
38 
empty file,
39 
Plan 9 executable,
40 
PAC audio file,
41 
.B cpio
42 
archive,
43 
.B tex
44 
.B dvi
45 
file,
46 
archive symbol table,
47 
archive,
48 
.B rc
49 
script,
50 
.B sh
51 
script,
52 
PostScript,
53 
.B troff
54 
output file for various devices,
55 
mail box,
56 
GIF,
57 
FAX,
58 
object code,
59 
C and Alef source,
60 
assembler source,
61 
compressed files,
62 
encrypted file,
63 
English text,
64 
compressed image,
65 
image,
66 
subfont,
67 
and
68 
font.
69 
.PP
70 
If a file has no apparent format,
71 
.I file
72 
looks at the character set it uses to classify it according to
73 
.SM ASCII\c
74 
,
75 
extended
76 
.SM ASCII\c
77 
, Latin
78 
.SM ASCII\c
79 
, or
80 
.SM UTF
81 
holding one or more of the following blocks of the Unicode Standard:
82 
Extended Latin,
83 
Greek,
84 
Cyrillic,
85 
Armenian,
86 
Hebrew,
87 
Arabic,
88 
Devanagari,
89 
Bengali,
90 
Gurmukhi,
91 
Gujarati,
92 
Oriya,
93 
Tamil,
94 
Telugu,
95 
Kannada,
96 
Malayalam,
97 
Thai,
98 
Lao,
99 
Tibetan,
100 
Georgian,
101 
Japanese,
102 
Chinese,
103 
or Korean.
104 
.PP
105 
If all else fails,
106 
.I file
107 
decides its input is
108 
binary.
109 
.SH SOURCE
110 
.B /sys/src/cmd/file.c
111 
.SH BUGS
112 
It can make mistakes.