file

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file とは、ファイルのタイプを調べるUnixのコマンドです。

読み方

file

ふぁいる

使い方

コマンドラインオプション

Usage: file [OPTION...] [FILE...]
Determine type of FILEs.
 
      --help                 display this help and exit
  -v, --version              output version information and exit
  -m, --magic-file LIST      use LIST as a colon-separated list of magic
                               number files
  -z, --uncompress           try to look inside compressed files
  -b, --brief                do not prepend filenames to output lines
  -c, --checking-printout    print the parsed form of the magic file, use in
                               conjunction with -m to debug a new magic file
                               before installing it
  -e, --exclude TEST         exclude TEST from the list of test to be
                               performed for file. Valid tests are:
                               ascii, apptype, compress, elf, soft, tar, tokens, troff
  -f, --files-from FILE      read the filenames to be examined from FILE
  -F, --separator STRING     use string as separator instead of `:'
  -i, --mime                 output MIME type strings (--mime-type and
                               --mime-encoding)
      --apple                output the Apple CREATOR/TYPE
      --mime-type            output the MIME type
      --mime-encoding        output the MIME encoding
  -k, --keep-going           don't stop at the first match
  -L, --dereference          follow symlinks (default)
  -h, --no-dereference       don't follow symlinks
  -n, --no-buffer            do not buffer output
  -N, --no-pad               do not pad output
  -0, --print0               terminate filenames with ASCII NUL
  -p, --preserve-date        preserve access times on files
  -r, --raw                  don't translate unprintable chars to \ooo
  -s, --special-files        treat special (block/char devices) files as
                             ordinary ones
  -C, --compile              compile file specified by -m
  -d, --debug                print debugging messages

ファイルのタイプを調べる

% file /bin/sh
/bin/sh: ELF 64-bit LSB executable, x86-64, version 1 (FreeBSD), dynamically
linked (uses shared libs), for FreeBSD 9.0 (900044), stripped
% file /etc/rc
/etc/rc: POSIX shell script text executable
% file /usr/src/usr.bin/grep/file.c
/usr/src/usr.bin/grep/file.c: UTF-8 Unicode C program text

関連項目

• バイナリ

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