Date: Fri, 6 Apr 2012 13:06:01 +0000 (UTC) From: Ed Schouten <ed@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r233945 - head/sbin/init Message-ID: <201204061306.q36D611i009782@svn.freebsd.org>
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Author: ed Date: Fri Apr 6 13:06:01 2012 New Revision: 233945 URL: http://svn.freebsd.org/changeset/base/233945 Log: Properly clear the O_NONBLOCK flag after opening the TTY. Though we should open the TTY with O_NONBLOCK to prevent rc(8) execution from potentially stalling, we must not forget to clear the flag later on, to prevent read(2) calls from failing later on. This prevented the shell pathname prompt from working properly. Reported by: kib Modified: head/sbin/init/init.c Modified: head/sbin/init/init.c ============================================================================== --- head/sbin/init/init.c Fri Apr 6 11:09:49 2012 (r233944) +++ head/sbin/init/init.c Fri Apr 6 13:06:01 2012 (r233945) @@ -572,9 +572,13 @@ open_console(void) { int fd; - /* Try to open /dev/console. */ + /* + * Try to open /dev/console. Open the device with O_NONBLOCK to + * prevent potential blocking on a carrier. + */ revoke(_PATH_CONSOLE); if ((fd = open(_PATH_CONSOLE, O_RDWR | O_NONBLOCK)) != -1) { + (void)fcntl(fd, F_SETFL, fcntl(fd, F_GETFL) & ~O_NONBLOCK); if (login_tty(fd) == 0) return; close(fd);
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