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unlink: Remove files via the unlink syscall
unlink deletes a single specified file name.
It is a minimalist interface to the system-provided
unlink function. See section `Deleting Files' in The GNU C Library Reference Manual. Synopsis:
On some systems
unlink can be used to delete the name of a
directory. On others, it can be used that way only by a privileged user.
In the GNU system
unlink can never delete the name of a directory.
unlink honors the `--help' and `--version'
options. That makes it a little harder to remove files named
--version, so when the environment variable
POSIXLY_CORRECT is set,
unlink treats such a command line
arguments not as an option, but as an operand.
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