PR/58208 CVS commit: src

["Taylor R Campbell" <riastradh%netbsd.org@localhost>]

The following reply was made to PR lib/58208; it has been noted by GNATS.

From: "Taylor R Campbell" <riastradh%netbsd.org@localhost>
To: gnats-bugs%gnats.NetBSD.org@localhost
Cc: 
Subject: PR/58208 CVS commit: src
Date: Mon, 15 Sep 2025 00:11:55 +0000

 Module Name:	src
 Committed By:	riastradh
 Date:		Mon Sep 15 00:11:55 UTC 2025
 
 Modified Files:
 	src/distrib/sets/lists/debug: mi
 	src/distrib/sets/lists/tests: mi
 	src/lib/libc/gen: ctype_.c ctype_guard.h isctype.c tolower_.c
 	    toupper_.c
 	src/lib/libc/locale: Makefile.inc rune.c
 	src/tests/lib/libc/gen: Makefile t_ctype.c
 Added Files:
 	src/tests/lib/libc/gen: h_ctype_abuse.c
 
 Log Message:
 ctype(3): New environment variable LIBC_ALLOWCTYPEABUSE.
 
 If set, this does not force the ctype(3) functions to crash when
 passed invalid inputs -- instead, they will return nonsense results,
 and possibly print warnings to stderr, as is their right in
 implementing undefined behaviour.
 
 The nature of the nonsense results is unspecified.  Currently, is*()
 will always return true (even if that leads to mutually contradictory
 conclusions, like isalpha and isdigit, or isgraph and isblank), and
 tolower/toupper() will always return EOF.  But perhaps in the future
 the results may be randomized.
 
 This way, if an application like firefox crashes on ctype abuse, you
 can opt to accept the consequences of nonsense results instead by
 running `env LIBC_ALLOWCTYPEABUSE= firefox' until the application is
 fixed.
 
 PR lib/58208: ctype(3) provides poor runtime feedback of abuse
 
 
 To generate a diff of this commit:
 cvs rdiff -u -r1.485 -r1.486 src/distrib/sets/lists/debug/mi
 cvs rdiff -u -r1.1393 -r1.1394 src/distrib/sets/lists/tests/mi
 cvs rdiff -u -r1.23 -r1.24 src/lib/libc/gen/ctype_.c
 cvs rdiff -u -r1.7 -r1.8 src/lib/libc/gen/ctype_guard.h
 cvs rdiff -u -r1.28 -r1.29 src/lib/libc/gen/isctype.c
 cvs rdiff -u -r1.17 -r1.18 src/lib/libc/gen/tolower_.c \
     src/lib/libc/gen/toupper_.c
 cvs rdiff -u -r1.68 -r1.69 src/lib/libc/locale/Makefile.inc
 cvs rdiff -u -r1.49 -r1.50 src/lib/libc/locale/rune.c
 cvs rdiff -u -r1.60 -r1.61 src/tests/lib/libc/gen/Makefile
 cvs rdiff -u -r0 -r1.1 src/tests/lib/libc/gen/h_ctype_abuse.c
 cvs rdiff -u -r1.11 -r1.12 src/tests/lib/libc/gen/t_ctype.c
 
 Please note that diffs are not public domain; they are subject to the
 copyright notices on the relevant files.