CVS commit: src/lib/libc/string

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

Module Name:    src
Committed By:   kre
Date:           Wed Mar 25 16:15:41 UTC 2020

Modified Files:
        src/lib/libc/string: strerror_r.c

Log Message:
Arrange that strerror(-1) prints "Unknown error: -1" and not the
unsigned equivalent of -1.

While here, guarantee, even when !NLS, that nothing here (not even
snprintf deciding to complain about EILSEQ or something) can ever
alter errno (ie: always save and restore it, not only in the NLS case).
The functions here must never alter errno, whatever happens.


To generate a diff of this commit:
cvs rdiff -u -r1.4 -r1.5 src/lib/libc/string/strerror_r.c

Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.