PR/60219 CVS commit: src

["Robert Elz" <kre%netbsd.org@localhost>]

The following reply was made to PR lib/60219; it has been noted by GNATS.

From: "Robert Elz" <kre%netbsd.org@localhost>
To: gnats-bugs%gnats.NetBSD.org@localhost
Cc: 
Subject: PR/60219 CVS commit: src
Date: Fri, 1 May 2026 07:19:46 +0000

 Module Name:	src
 Committed By:	kre
 Date:		Fri May  1 07:19:45 UTC 2026
 
 Modified Files:
 	src/include: time.h
 	src/lib/libc/gen: sysconf.3 sysctl.c
 	src/lib/libc/time: localtime.c
 	src/share/man/man7: sysctl.7
 
 Log Message:
 PR lib/60219 -- Fix sysconf(_SC_TZNAME_MAX)
 
 That value is supposed to be the minimum value allowed for
 the maximum length of a timezone abbreviation.   It cannot
 be something larger than is allowed for that (and NAME_MAX
 has nothing to do with it)
 
 It defines the max lengths allowed for the words in
 
 	TZ=Frankenstein-7Monster-6[transition rules]
 
 in old style POSIX TZ variable settings - the POSIX required
 minimum value is 6 (so "Frankenstein" would not fit in a minimalist
 POSIX implementation).
 
 For now, sync the values between libc/sysctl() and libc/localtime()
 via a new _TZNAME_MAXIMUM definition in <time.h> and use that for
 both purposes (as a possible default anyway for localtime() - there
 the default value used will always be at least 254, and building with
 -DTZNAME_MAXIMUM=N can override that value with anything larger than
 _TZNAME_MAXIMUM if desired).
 
 While here fix as many instances of the "max number of types" (which
 should be "max number of bytes") string in related contexts that I could
 find - there might perhaps be more.
 
 XXX pullup -11 (at least)
 
 
 To generate a diff of this commit:
 cvs rdiff -u -r1.56 -r1.57 src/include/time.h
 cvs rdiff -u -r1.57 -r1.58 src/lib/libc/gen/sysconf.3
 cvs rdiff -u -r1.39 -r1.40 src/lib/libc/gen/sysctl.c
 cvs rdiff -u -r1.153 -r1.154 src/lib/libc/time/localtime.c
 cvs rdiff -u -r1.171 -r1.172 src/share/man/man7/sysctl.7
 
 Please note that diffs are not public domain; they are subject to the
 copyright notices on the relevant files.