ntpd: be more verbose when logging privsep errors

[Brent Cook]

This makes it easier for a sysadmin to diagnose a privilege separation
path problem without looking at the source code for why 'stat' failed.

ok?

---
 src/usr.sbin/ntpd/ntp.c | 11 +++++++----
 1 file changed, 7 insertions(+), 4 deletions(-)

diff --git a/src/usr.sbin/ntpd/ntp.c b/src/usr.sbin/ntpd/ntp.c
index 87b769b..625364a 100644
--- a/src/usr.sbin/ntpd/ntp.c
+++ b/src/usr.sbin/ntpd/ntp.c
@@ -121,10 +121,13 @@ ntp_main(int pipe_prnt[2], int fd_ctl, struct ntpd_conf 
*nconf,
        ntp_dns(pipe_dns, nconf, pw);
        close(pipe_dns[1]);

-       if (stat(pw->pw_dir, &stb) == -1)
-               fatal("stat");
-       if (stb.st_uid != 0 || (stb.st_mode & (S_IWGRP|S_IWOTH)) != 0)
-               fatalx("bad privsep dir permissions");
+       if (stat(pw->pw_dir, &stb) == -1) {
+               fatal("privsep dir %s could not be opened", pw->pw_dir);
+       }
+       if (stb.st_uid != 0 || (stb.st_mode & (S_IWGRP|S_IWOTH)) != 0) {
+               fatalx("bad privsep dir %s permissions: %o",
+                   pw->pw_dir, stb.st_mode);
+       }
        if (chroot(pw->pw_dir) == -1)
                fatal("chroot");
        if (chdir("/") == -1)
--
1.9.1