From 01a6c054d548d9fff8bbdfac4d3f3de4ae8677a1 Mon Sep 17 00:00:00 2001 From: Austin Clements Date: Wed, 7 Sep 2011 11:49:14 -0400 Subject: Remove web directory; all cruft or moved to 6.828 repo --- web/xv6-names.html | 78 ------------------------------------------------------ 1 file changed, 78 deletions(-) delete mode 100644 web/xv6-names.html (limited to 'web/xv6-names.html') diff --git a/web/xv6-names.html b/web/xv6-names.html deleted file mode 100644 index 926be3a..0000000 --- a/web/xv6-names.html +++ /dev/null @@ -1,78 +0,0 @@ - - -Homework: Naming - - - -

Homework: Naming

- -

-Read: namei in fs.c, fd.c, sysfile.c - -

-This homework should be turned in at the beginning of lecture. - -

-Symbolic Links - -

-As you read namei and explore its varied uses throughout xv6, -think about what steps would be required to add symbolic links -to xv6. -A symbolic link is simply a file with a special type (e.g., T_SYMLINK -instead of T_FILE or T_DIR) whose contents contain the path being -linked to. - -

-Turn in a short writeup of how you would change xv6 to support -symlinks. List the functions that would have to be added or changed, -with short descriptions of the new functionality or changes. - -

-This completes the homework. - -

-The following is not required. If you want to try implementing -symbolic links in xv6, here are the files that the course staff -had to change to implement them: - -

-fs.c: 20 lines added, 4 modified
-syscall.c: 2 lines added
-syscall.h: 1 line added
-sysfile.c: 15 lines added
-user.h: 1 line added
-usys.S: 1 line added
-

- -Also, here is an ln program: - -

-#include "types.h"
-#include "user.h"
-
-int
-main(int argc, char *argv[])
-{
-  int (*ln)(char*, char*);
-  
-  ln = link;
-  if(argc > 1 && strcmp(argv[1], "-s") == 0){
-    ln = symlink;
-    argc--;
-    argv++;
-  }
-  
-  if(argc != 3){
-    printf(2, "usage: ln [-s] old new (%d)\n", argc);
-    exit();
-  }
-  if(ln(argv[1], argv[2]) < 0){
-    printf(2, "%s failed\n", ln == symlink ? "symlink" : "link");
-    exit();
-  }
-  exit();
-}
-

- - -- cgit v1.2.3