Add fs_delete() syscall

kernel/syscall/fs.c

@@ -224,3 +224,23 @@ int32_t SYSCALL1(sys_fs_mkdir, opath1) {
 done:
   return ret;
 }
+
+int32_t SYSCALL1(sys_fs_delete, opath1) {
+  int32_t ret = E_BADIO;
+  const char *opath = (const char *)opath1;
+  
+  if (opath == NULL) {
+    ret = E_INVALIDARGUMENT;
+    goto done;
+  }
+
+  char mp[_MP_MAX];
+  char path[_PATH_MAX];
+
+  path_parse(opath, mp, path);
+
+  ret = vfs_delete(mp, path);
+
+done:
+  return ret;
+}

kernel/syscall/fs.h

@@ -12,5 +12,6 @@ int32_t SYSCALL4(sys_fs_read, fsh1, buffer1, len1, off1);
 int32_t SYSCALL2(sys_fs_stat, opath1, fsstat1);
 int32_t SYSCALL3(sys_fs_fetchdirent, opath1, direntbuf1, idx1);
 int32_t SYSCALL1(sys_fs_mkdir, opath1);
+int32_t SYSCALL1(sys_fs_delete, opath1);
 
 #endif // SYSCALL_FS_H_

kernel/syscall/syscall.c

@@ -47,6 +47,7 @@ SyscallFn SYSCALL_TABLE[SYSCALLS_MAX] = {
   [SYS_FS_STAT]     = &sys_fs_stat,
   [SYS_FS_FETCHDIRENT] = &sys_fs_fetchdirent,
   [SYS_FS_MKDIR]    = &sys_fs_mkdir,
+  [SYS_FS_DELETE]   = &sys_fs_delete,
   [SYS_DEV_GETHANDLE] = &sys_dev_gethandle,
   [SYS_DEV_LISTSIZE]  = &sys_dev_listsize,
   [SYS_DEV_STAT]      = &sys_dev_stat,