On Tue, May 08, 2012 at 06:13:10PM +0530, pcuser p wrote:
Thanks all for ur replies. I gave a try to create a new rootfile system (ext2) by following the procedure in free-electrons.com and examples in the busybox folder. Surprisingly, it got built properly and run upto the same point and doesn't accept any commands i'm typing. I haven't added serial related stuff (gettty) in the inittab/rcS file as I am still not much clear about it.
My query is: At later point after file system mounted, is this same console used for login? (i'm having only one UART port in my board -> ttySAC0) Am I getting this err (/bin/sh: can't access tty; job control turned off) because console is locked already for printk's? What changes are needed in the inittab & /etc/init.d/rcS file to get the working shell prompt for this scenario?
Because *your* /bin/sh is running on /dev/console
below are the console messages: RAMDISK: ext2 filesystem found at block 0 RAMDISK: Loading 3072KiB [1 disk] into ram disk... \ done. VFS: Mounted root (ext2 filesystem) readonly on device 1:0. Freeing init memory: 80K /bin/sh: can't access tty; job control turned off / #
/etc/inittab file contents # This is run first script ::sysinit:/etc/init.d/rcS # Start an "askfirst" shell on the console ::askfirst:/bin/sh # Stuff to do when restarting the init process ::restart:/sbin/init # Stuff to do before rebooting ::ctrlaltdel:/sbin/reboot ::shutdown:/bin/umount a r
/etc/init.d/rcS file contents #!/bin/sh mount t proc none /proc mount t sysfs none /sys exec /sbin/sh /bin/sh
Remove the last two lines and add a line "exec /bin/sh" might works. And, I suggest you write rcS as examples/bootfloppy/etc/inittab in busybox src tree, and do not drop sh lines in rcS # examples/bootfloppy/etc/inittab: ::sysinit:/etc/init.d/rcS ::respawn:-/bin/sh tty2::askfirst:-/bin/sh ::ctrlaltdel:/bin/umount -a -r -- Regards, Adam Lee -------------------------------- E-mail: adam8157@gmail.com Website: http://adam8157.info --------------------------------