7250fb6968
This provides a reliable and portable way to test whether an environment variable is defined. (Of course, if you are using glibc you may get false positives if you include a = in the query.) Signed-off-by: Mattias Andrée <maandree@kth.se>
30 lines
496 B
Groff
30 lines
496 B
Groff
.Dd 2016-03-30
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.Dt PRINTENV 1
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.Os sbase
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.Sh NAME
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.Nm printenv
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.Nd print the environment or values of variables
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.Sh SYNOPSIS
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.Nm
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.Op Ar var ...
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.Sh DESCRIPTION
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.Nm
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prints the entire environment as key=value pairs if no
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.Ar var
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is given. Otherwise,
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.Nm
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prints only the value of each
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.Ar var
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one per line in the order specified.
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.SH EXIT STATUS
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.Bl -tag -width Ds
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.It 0
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Successful completion.
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.It 1
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One or more queried variables were not found.
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.It > 1
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An error occurred.
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.El
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.Sh SEE ALSO
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.Xr env 1
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