libbb: handle UNC paths in recursive make directory calls

1 files changed, 23 insertions, 2 deletions

diff --git a/libbb/make_directory.c b/libbb/make_directory.c
index 39599b657..1f874f1f2 100644
--- a/libbb/make_directory.c
+++ b/libbb/make_directory.c
@@ -45,10 +45,31 @@ int FAST_FUNC bb_make_directory(char *path, long mode, int flags)
                 c = '\0';
 
                 if (flags & FILEUTILS_RECUR) {  /* Get the parent */
-                        /* skip drive letter */
-                        if (ENABLE_PLATFORM_MINGW32 && s == path && *s && s[1] == ':') {
+#if ENABLE_PLATFORM_MINGW32
+                        if (s == path && *s && s[1] == ':') {
+                                /* skip drive letter */
                                 s += 2;
                         }
+                        else if (s == path && s[0] == '/' && s[1] == '/' ) {
+                                /* skip UNC server and share */
+                                int count = 0;
+                                s += 2;
+                                while (*s) {
+                                        if (*s == '/') {
+                                                do {
+                                                        ++s;
+                                                } while (*s == '/');
+                                                if (++count == 2) {
+                                                        --s;
+                                                        break;
+                                                }
+                                        }
+                                        else {
+                                                ++s;
+                                        }
+                                }
+                        }
+#endif
                         /* Bypass leading non-'/'s and then subsequent '/'s */
                         while (*s) {
                                 if (*s == '/') {