agetty: cleanup argv parsing, utmp update, use writeall(), etc.

Next cleanup, that is split off special character parsing in do_prompt()
and parse_args(), handle name of line of virtual console and use it in
utmp update as well as the session id.  Also move the initial TERM
variable to open_tty() as we use this later in open_tty().  Use writeall()
but avoid repeat to often for EAGAIN (compare with info page of the
(g)libc, description of the macro EAGAIN).

Signed-off-by: Werner Fink <werner@suse.de>

1 files changed, 2 insertions, 0 deletions

diff --git a/include/writeall.h b/include/writeall.h
index a04496d8f..20207076d 100644
--- a/include/writeall.h
+++ b/include/writeall.h
@@ -18,6 +18,8 @@ static inline int write_all(int fd, const void *buf, size_t count)
 				buf += tmp;
 		} else if (errno != EINTR && errno != EAGAIN)
 			return -1;
+		if (errno == EAGAIN)	/* Try later, *sigh* */
+			usleep(10000);
 	}
 	return 0;
 }