Hello Stefan and Alex, On 7/28/21 10:20 PM, Alejandro Colomar wrote: > Reported-by: Stefan Kanthak <stefan.kanthak@xxxxxxxx> > Signed-off-by: Alejandro Colomar <alx.manpages@xxxxxxxxx> Thanks. Patch applied. Cheers, Michael > --- > man3/strstr.3 | 8 ++++++++ > 1 file changed, 8 insertions(+) > > diff --git a/man3/strstr.3 b/man3/strstr.3 > index e085409c2..41ee87489 100644 > --- a/man3/strstr.3 > +++ b/man3/strstr.3 > @@ -61,6 +61,14 @@ but ignores the case of both arguments. > .SH RETURN VALUE > These functions return a pointer to the beginning of the > located substring, or NULL if the substring is not found. > +.PP > +Note the special case: > +If > +.I needle > +is the empty string, > +the return value is always > +.I haystack > +itself. > .SH ATTRIBUTES > For an explanation of the terms used in this section, see > .BR attributes (7). > -- Michael Kerrisk Linux man-pages maintainer; http://www.kernel.org/doc/man-pages/ Linux/UNIX System Programming Training: http://man7.org/training/
