Apply vodz' last_patch52

[oweals/busybox.git] / libbb / last_char_is.c

diff --git a/libbb/last_char_is.c b/libbb/last_char_is.c
index 36b695b40af3136a6135efcf013a11702f51b02f..4e2ee92ed9a71a2231a4bdafeaef1062e972ea98 100644 (file)
--- a/libbb/last_char_is.c
+++ b/libbb/last_char_is.c
@@ -19,15 +19,19 @@
  *
  */
 
+#include <string.h>
 #include "libbb.h"
 
 /* Find out if the last character of a string matches the one given Don't
  * underrun the buffer if the string length is 0.  Also avoids a possible
  * space-hogging inline of strlen() per usage.
  */
-char * last_char_is(char *s, int c)
+char * last_char_is(const char *s, int c)
 {
-       char *sret  = s+strlen(s)-1;
+       char *sret;
+       if (!s)
+           return NULL;
+       sret  = (char *)s+strlen(s)-1;
        if (sret>=s && *sret == c) { 
                return sret;
        } else {