diff options
| -rw-r--r-- | content/posts/WIP-how-bsd-authentication-works/index.org | 21 |
1 files changed, 19 insertions, 2 deletions
diff --git a/content/posts/WIP-how-bsd-authentication-works/index.org b/content/posts/WIP-how-bsd-authentication-works/index.org index 9b17953..5bc90b7 100644 --- a/content/posts/WIP-how-bsd-authentication-works/index.org +++ b/content/posts/WIP-how-bsd-authentication-works/index.org @@ -635,10 +635,27 @@ #+end_src =_auth_spool='s job is to read data from =fd= and place it in - =as->spool=, and to update =as->index= to the length of the data on - the spool. + =as->spool=, and to update =as->index= with the length of the data + on the spool. While spooling it converts newlines to =NUL='s in + order to parse the output more easily. It also handles any file + descriptors passed through the back channel by sending them to + =_recv_fd=. + + #+begin_src c + // [...] + if (strcasecmp(s, BI_FDPASS) == 0) + _recv_fd(as, fd); + #+end_src + ** _recv_fd + #+begin_src c + static void _recv_fd(auth_session_t *as, int fd) + #+end_src + =_recv_fd= reads control messages, also called ancillary data, from + =fd= and tried to receive a file descriptor. If it receives one and + =as->fd= is equal to =-1=, it sets it to the received file + descriptor. Otherwise it closes the received file descriptor. * auth_close =auth_close= is the function responsible for cleaning up the session and taking care of the values returned though the back channel. |