recallocarray in tail(1)

[Martijn van Duren]

Hello,

There's one instance in tail(1) where recallocarray is appropriate. In
fact, it would have prevented the regression I introduced originally.

OK?

martijn@

Index: read.c
===================================================================
RCS file: /cvs/src/usr.bin/tail/read.c,v
retrieving revision 1.18
diff -u -p -r1.18 read.c
--- read.c      1 Feb 2017 16:21:12 -0000       1.18
+++ read.c      26 Mar 2017 16:29:24 -0000
@@ -166,10 +166,9 @@ lines(struct tailfile *tf, off_t off)
                if (recno >= lineno) {
                        nlineno = (lineno + 1024) > off ?
                            (size_t) off : lineno + 1024;
-                       lines = reallocarray(lines, nlineno, sizeof(*lines));
-                       if (lines == NULL)
+                       if ((lines = recallocarray(lines, lineno, nlineno,
+                           sizeof(*lines))) == NULL)
                                err(1, NULL);
-                       bzero(lines + recno, nlineno - lineno);
                        lineno = nlineno;
                }
                if (ch == '\n') {