[hackers] [sbase] Fix issue with negative integers passed to expand(1) || FRIGN

[git]

commit da6a1cd53cce9a16b31daa8cb0bfb617f0cb7e40
Author: FRIGN <d...@frign.de>
Date:   Sun Jan 25 15:24:48 2015 +0100

    Fix issue with negative integers passed to expand(1)
    
    WISDOM OF THE DAY: strtoul() does not error out, when it hits a '-'-sign.
    Instead, it happily carries on and fucks everything up.

diff --git a/expand.c b/expand.c
index 126fe32..3862afa 100644
--- a/expand.c
+++ b/expand.c
@@ -6,9 +6,9 @@
 #include "utf.h"
 #include "util.h"
 
-static int     iflag      = 0;
-static size_t *tablist    = NULL;
-static size_t  tablistlen = 0;
+static int      iflag      = 0;
+static ssize_t *tablist    = NULL;
+static size_t   tablistlen = 0;
 
 static size_t
 parselist(const char *s, size_t slen)
@@ -29,13 +29,13 @@ parselist(const char *s, size_t slen)
                        len++;
                }
        }
-       tablist = emalloc((len + 1) * sizeof(size_t));
+       tablist = emalloc((len + 1) * sizeof(ssize_t));
 
        m = 0;
        for (i = 0; i < slen; i += sep - (s + i) + 1) {
-               tablist[m++] = strtoul(s + i, &sep, 10);
-               if (tablist[m - 1] == 0)
-                       eprintf("expand: tab size can't be zero.\n");
+               tablist[m++] = strtol(s + i, &sep, 10);
+               if (tablist[m - 1] <= 0)
+                       eprintf("expand: tab size can't be negative or 
zero.\n");
                if (*sep && *sep != ',' && *sep != ' ')
                        eprintf("expand: invalid number in tablist.\n");
                if (m > 1 && tablist[m - 1] < tablist[m - 2])