consistently ignore more than 14 chars in path component

forbid create or write of existing directory
mkdir("d1/d2/d3"), .. should refer to d2, not cwd
mkdir increase parent link count

1 files changed, 4 insertions, 1 deletions

diff --git a/fs.c b/fs.c
index a83e937..6c552e6 100644
--- a/fs.c
+++ b/fs.c
@@ -499,7 +499,10 @@ namei(char *path, int mode, uint *ret_off, char **ret_last, struct inode **ret_i
         for(i = 0; i < DIRSIZ && cp[i] != '/' && cp[i]; i++)
           if(cp[i] != ep->name[i])
             break;
-        if((cp[i] == '\0' || cp[i] == '/') && (i >= DIRSIZ || ep->name[i] == '\0')){
+        if((cp[i] == '\0' || cp[i] == '/' || i >= DIRSIZ) &&
+           (i >= DIRSIZ || ep->name[i] == '\0')){
+          while(cp[i] != '\0' && cp[i] != '/')
+            i++;
           off += (uchar*)ep - bp->data;
           ninum = ep->inum;
           brelse(bp);