diff options
| -rw-r--r-- | trans/symlink.c | 99 |
1 files changed, 99 insertions, 0 deletions
diff --git a/trans/symlink.c b/trans/symlink.c new file mode 100644 index 00000000..25fa16cf --- /dev/null +++ b/trans/symlink.c @@ -0,0 +1,99 @@ +/* Translator for S_IFLNK nodes + Copyright (C) 1994 Free Software Foundation + + This program is free software; you can redistribute it and/or + modify it under the terms of the GNU General Public License as + published by the Free Software Foundation; either version 2, or (at + your option) any later version. + + This program is distributed in the hope that it will be useful, but + WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program; if not, write to the Free Software + Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ + +mach_port_t realnode, dotdotnode; + +/* We return this for O_NOLINK lookups */ +mach_port_t realnodenoauth; + +/* We return this for non O_NOLINK lookups */ +char *linktarget; + +main (int argc, char **argv) +{ + mach_port_t bootstrap; + mach_port_t control; + + _libports_initialize (); + + task_get_bootstrap_port (mach_task_self (), &bootstrap); + if (bootstrap == MACH_PORT_NULL) + { + fprintf (stderr, "%s must be started as a translator\n", argv[0]); + exit (1); + } + + if (argc != 2) + { + fprintf (stderr, "Usage: %s link-target\n", argv[0]); + exit (1); + } + + linktarget = argv[1]; + + /* Reply to our parent */ + control = ports_allocate_port (PT_CTL, sizeof (struct port_info)); + error = fsys_startup (bootstrap, ports_get_right (control), + MACH_MSG_TYPE_MAKE_SEND, &realnode, &dotdotnode); + + io_restrict_auth (realnode, &realnodenoauth, 0, 0, 0, 0); + + /* Launch */ + ports_manage_port_operations_onethread (); + return 0; +} + + +S_fsys_getroot (mach_port_t fsys_t, + uid_t *uids, + u_int nuids, + uid_t *gids, + u_int ngids, + int flags, + retry_type *do_retry, + char *retry_name, + mach_port_t *ret, + mach_port_name_t *rettype) +{ + if (flags & O_NOLINK) + { + /* Return our underlying node. */ + *ret = realnodenoauth; + *rettype = MACH_MSG_TYPE_COPY_SEND; + *do_retry = FS_RETRY_REAUTH; + retry_name[0] = '\0'; + return 0; + } + else + { + /* Return telling the user to follow the link */ + strcpy (retry_name, linktarget); + if (linktarget[0] == '/') + { + *do_retry = FS_RETRY_NORMAL; + *ret = MACH_PORT_NULL; + *rettype = MACH_MSG_TYPE_COPY_SEND; + } + else + { + *do_retry = FS_RETRY_REAUTH; + *ret = dotdotnode; + *rettype = MACH_MSG_TYPE_COPY_SEND; + } + } + return 0; +} |