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| -rw-r--r-- | pod/perlhacktips.pod | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/pod/perlhacktips.pod b/pod/perlhacktips.pod index 4e4bbc2347..0112751d07 100644 --- a/pod/perlhacktips.pod +++ b/pod/perlhacktips.pod @@ -605,7 +605,15 @@ Do not use sprintf() or vsprintf() If you really want just plain byte strings, use my_snprintf() and my_vsnprintf() instead, which will try to use snprintf() and vsnprintf() if those safer APIs are available. If you want something -fancier than a plain byte string, use SVs and Perl_sv_catpvf(). +fancier than a plain byte string, use +L<C<Perl_form>()|perlapi/form> or SVs and +L<C<Perl_sv_catpvf()>|perlapi/sv_catpvf>. + +Note that some versions of all the C<sprintf()> forms are buggy in +glibc as of version 2.17. They won't allow a C<%s> format to create a +string that isn't valid UTF-8 if the current underlying locale of the +program is UTF-8. What happens is that the C<%s> and its operand are +simply skipped without any notice. =back |