Support Illumos/Solaris fine-grained privileges

Includes a pre-auth privsep sandbox and several pledge()
emulations. bz#2511, patch by Alex Wilson.

ok dtucker@

1 files changed, 3 insertions, 0 deletions

diff --git a/sftp-server.c b/sftp-server.c
index 62e76a505..79ef45b10 100644
--- a/sftp-server.c
+++ b/sftp-server.c
@@ -1598,6 +1598,9 @@ sftp_server_main(int argc, char **argv, struct passwd *user_pw)
                 fatal("unable to make the process undumpable");
 #endif /* defined(HAVE_PRCTL) && defined(PR_SET_DUMPABLE) */
 
+        /* Drop any fine-grained privileges we don't need */
+        platform_pledge_sftp_server();
+
         if ((cp = getenv("SSH_CONNECTION")) != NULL) {
                 client_addr = xstrdup(cp);
                 if ((cp = strchr(client_addr, ' ')) == NULL) {