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-rw-r--r--libbb/concat_path_file.c7
-rw-r--r--libbb/last_char_is.c5
2 files changed, 9 insertions, 3 deletions
diff --git a/libbb/concat_path_file.c b/libbb/concat_path_file.c
index 61efa9c3e..c699a84f7 100644
--- a/libbb/concat_path_file.c
+++ b/libbb/concat_path_file.c
@@ -13,11 +13,14 @@ extern char *concat_path_file(const char *path, const char *filename)
{
char *outbuf;
char *lc;
-
+
+ if (!path)
+ path="";
lc = last_char_is(path, '/');
if (filename[0] == '/')
filename++;
outbuf = xmalloc(strlen(path)+strlen(filename)+1+(lc==NULL));
- sprintf(outbuf, (lc==NULL ? "%s/%s" : "%s%s"), path, filename);
+ sprintf(outbuf, "%s%s%s", path, (lc==NULL)? "/" : "", filename);
+
return outbuf;
}
diff --git a/libbb/last_char_is.c b/libbb/last_char_is.c
index a95e57c35..4e2ee92ed 100644
--- a/libbb/last_char_is.c
+++ b/libbb/last_char_is.c
@@ -28,7 +28,10 @@
*/
char * last_char_is(const char *s, int c)
{
- char *sret = (char *)s+strlen(s)-1;
+ char *sret;
+ if (!s)
+ return NULL;
+ sret = (char *)s+strlen(s)-1;
if (sret>=s && *sret == c) {
return sret;
} else {