(kpathsea.info)Suppressing warnings

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6.4 Suppressing warnings
========================

Kpathsea provides a way to suppress selected usually-harmless warnings;
this is useful at large sites where most users are not administrators,
and thus the warnings are merely a source of confusion, not a help.  To
do this, you set the environment variable or configuration file value
'TEX_HUSH' to a colon-separated list of values.  Here are the
possibilities:

'all'
     Suppress everything possible.

'checksum'
     Suppress mismatched font checksum warnings.

'lostchar'
     Suppress warnings when a character is missing from a font that a
     DVI or VF file tries to typeset.

'none'
     Don't suppress any warnings.

'readable'
     Suppress warnings about attempts to access a file whose permissions
     render it unreadable.

'special'
     Suppresses warnings about an unimplemented or unparsable '\special'
     command.

'tex-hush.c' defines the function that checks the variable value.  Each
driver implements its own checks where appropriate.