[hackers] [sbase] paste: fix crash with empty delimiter || Hiltjo Posthuma

[git]

commit 398598dbbe5e533ca10d93c690becaa66f589b75
Author: Hiltjo Posthuma <hil...@codemadness.org>
Date:   Mon Mar 30 21:25:23 2015 +0200

    paste: fix crash with empty delimiter
    
    reproduce:
        paste -d '' /dev/null
    or
        paste -d '\0' /dev/null
    
    show usage() in these cases.

diff --git a/paste.c b/paste.c
index f90f37f..5ccda3a 100644
--- a/paste.c
+++ b/paste.c
@@ -109,6 +109,8 @@ main(int argc, char *argv[])
        unescape(adelim);
        delim = ereallocarray(NULL, utflen(adelim) + 1, sizeof(*delim));
        len = utftorunestr(adelim, delim);
+       if (!len)
+               usage();
 
        /* populate file list */
        dsc = ereallocarray(NULL, argc, sizeof(*dsc));