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sys: Add `isgraph()` to <sys/ctype.h>
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Authored by dumbbell on Jun 14 2026, 9:19 AM.
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Summary

Quote from https://pubs.opengroup.org/onlinepubs/7908799/xbd/locale.html:

"graph": Define characters to be classified as printable characters,
not including the space character.

This is part of the update of DRM drivers to Linux 6.13.

Sponsored by: The FreeBSD Foundation

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rG FreeBSD src repository
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