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6_functions
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twiddle
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2001-03-21
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902b
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Synopsis:
$twiddle(<tilde-expansion>)
Technical:
This function is used to do tilde-expansion on the given name. The tilde
is required. If a user exists on the system with a home directory, the
full path of that directory is returned. If the user does not exist,
nothing is returned. If a tilde is not the first character, the input is
returned.
Practical:
This is useful for ensuring that files will be written to your home
directory, regardless of the current directory.
Returns:
full path of home directory if user exists, nothing if not, input if error
Examples:
$twiddle(~) returns your home directory
$twiddle(~jvs) returns home directory for user jvs
$twiddle(~nosuchuser) no such user, returns nothing
$twiddle(blah) bad input, returns "blah"
See Also:
Environment(7); cd(4)