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Annotation of lucent/sys/man/1/file, revision 1.1.1.1

1.1       root        1: .TH FILE 1
                      2: .SH NAME
                      3: file \- determine file type
                      4: .SH SYNOPSIS
                      5: .B file
                      6: [
                      7: .I file
                      8: \&...
                      9: ]
                     10: .SH DESCRIPTION
                     11: .I File
                     12: performs a series of tests on its argument
                     13: .I files
                     14: in an attempt to classify their contents by language or purpose.
                     15: If no arguments are given, the classification is performed
                     16: on standard input.
                     17: .PP
                     18: The file types it looks for include
                     19: directory,
                     20: device file,
                     21: zero-filled file,
                     22: empty file,
                     23: Plan 9 executable,
                     24: PAC audio file,
                     25: .B cpio
                     26: archive,
                     27: .B tex
                     28: .B dvi
                     29: file,
                     30: archive symbol table,
                     31: archive,
                     32: .B rc
                     33: script,
                     34: .B sh
                     35: script,
                     36: PostScript,
                     37: .B troff
                     38: output file for various devices,
                     39: GIF,
                     40: FAX,
                     41: .IR picfile (9.6),
                     42: object code,
                     43: C and Alef source,
                     44: assembler source,
                     45: compressed files,
                     46: encrypted file,
                     47: English text,
                     48: Plan 9 bitmap,
                     49: Plan 9 subfont,
                     50: Plan 9 font.
                     51: .PP
                     52: If a file has no apparent format,
                     53: .I file
                     54: looks at the character set it uses to classify it according to
                     55: .SM ASCII\c
                     56: ,
                     57: extended
                     58: .SM ASCII\c
                     59: , Latin
                     60: .SM ASCII\c
                     61: , or
                     62: .SM UTF
                     63: holding one or more of the following blocks of the Unicode Standard:
                     64: Extended Latin,
                     65: Greek,
                     66: Cyrillic,
                     67: Armenian,
                     68: Hebrew,
                     69: Arabic,
                     70: Devanagari,
                     71: Bengali,
                     72: Gurmukhi,
                     73: Gujarati,
                     74: Oriya,
                     75: Tamil,
                     76: Telugu,
                     77: Kannada,
                     78: Malayalam,
                     79: Thai,
                     80: Lao,
                     81: Tibetan,
                     82: Georgian,
                     83: Japanese,
                     84: Chinese,
                     85: or Korean.
                     86: .PP
                     87: If all else fails,
                     88: .I file
                     89: decides its input is
                     90: binary.
                     91: .SH SOURCE
                     92: .B /sys/src/cmd/file.c
                     93: .SH BUGS
                     94: It can make mistakes, for example classifying a file of decimal data,
                     95: .LR .01 ,
                     96: .LR .02 ,
                     97: etc. as
                     98: .IR troff (1)
                     99: input.

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