z/OS V1R9.0 UNIX System Services Command ... - Christian Grothoff

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file
File Tag Specific Options
tests, default context-sensitive tests, nor AMODE tests shall be applied,
unless the -d option is also specified. See ″Usage Notes″.
–m magic
Alters the classification of regular files when examining the file content.
If the variable _UNIX03=YES is set
Then file attempts to classify the file type using the following tests,
in order:
1. Using the file magic.
2. Using the default position-sensitive tests (/etc/magic ).
3. Using the default context-sensitive tests built into the file
command.
If the variable _UNIX03 is unset or is not set to YES
Then file attempts to classify the file type using the following tests,
in order:
1. Using the file magic rather than /etc/magic.
2. Using the default context-sensitive built into the file command.
See ″Usage Notes″.
–B Disable autoconversion of tagged files.
Environment variables
file uses the following environment variable:
Localization
Files
_UNIX03
For more information about the affect of _UNIX03 on this command, see
Appendix N, “UNIX shell commands changed for UNIX03,” on page 943.
file uses the following localization environment variables:
v LANG
v LC_ALL
v LC_MESSAGES
v LC_SYNTAX
v NLSPATH
See Appendix F for more information.
file uses the following file:
/etc/magic
Default system magic file.
For file to work, you need to copy the magic file from the /samples directory to the
/etc directory.
For more information on enabling file, see “Enabling the file Utility” in z/OS UNIX
System Services Planning. Additional information on the magic file can be found in
“magic — Format of the /etc/magic file” on page 912.
278 z/OS V1R9.0 UNIX System Services Command Reference