From mboxrd@z Thu Jan 1 00:00:00 1970 To: Prakash kanthi Cc: Frederic Soulier , "PPC-Linux list (E-mail)" Subject: Re: Ramdisk details; execve("/bin/sh") output From: Wolfgang Denk Mime-version: 1.0 Content-type: text/plain; charset=ISO-8859-1 In-reply-to: Your message of "Wed, 15 Jan 2003 20:49:11 PST." <20030116044911.1234.qmail@web41201.mail.yahoo.com> Date: Thu, 16 Jan 2003 09:06:53 +0100 Message-Id: <20030116080659.073A8C608E@atlas.denx.de> Sender: owner-linuxppc-embedded@lists.linuxppc.org List-Id: In message <20030116044911.1234.qmail@web41201.mail.yahoo.com> you wrote: > > 1. How can i see the contents of a ramdisk? I > downloaded one from denx and i want to see what is in > there? 1. [in case of PPCBoot image:] strip header 2. Uncompress 3. Mount using the loopback device For example: # dd if=simple-ramdisk.PPCBoot of=simple-ramdisk.gz bs=64 skip=1 8874+1 records in 8874+1 records out # gunzip simple-ramdisk.gz # mount -o loop simple-ramdisk /mnt # ls -lR /mnt /mnt: total 17 drwxr-xr-x 2 root root 1024 Jun 4 1999 bin drwxr-xr-x 2 root root 1024 Oct 2 2000 dev drwxr-xr-x 2 root root 1024 Jun 4 1999 etc drwxr-xr-x 2 root root 1024 Jun 4 1999 lib -rwxr-xr-x 1 root root 136 Jan 11 1999 linuxrc drwxr-xr-x 2 root root 12288 Jun 4 1999 lost+found /mnt/bin: total 463 -rwxr-xr-x 1 root root 37480 Mar 1 1998 date -rwxr-xr-x 1 root root 54584 Sep 8 1998 ls -rwxr-xr-x 1 root root 375704 Sep 8 1998 sh /mnt/dev: total 0 crw-r--r-- 1 root root 5, 1 Mar 22 2000 console crw-rw-rw- 1 root root 5, 0 Jun 4 1999 tty crw-rw-rw- 1 root root 4, 64 Jun 4 1999 ttyS0 /mnt/etc: total 0 -rw-r--r-- 1 root root 0 Jan 11 1999 mtab /mnt/lib: total 1042 -rwxr-xr-x 1 root root 83138 Apr 24 2001 ld.so.1 -rwxr-xr-x 1 root root 825404 Sep 8 1998 libc-1.99.so -rw-r--r-- 1 root root 53356 Jan 11 1999 libcrypt.so.1 lrwxrwxrwx 1 root root 12 Jun 4 1999 libc.so.6 -> libc-1.99.so -rw-r--r-- 1 root root 61586 Jan 11 1999 libproc.so.1.2.6 lrwxrwxrwx 1 root root 19 Jun 4 1999 libtermcap.so.2 -> libtermcap.so.2.0.8 -rwxr-xr-x 1 root root 30152 Sep 8 1998 libtermcap.so.2.0.8 /mnt/lost+found: total 0 # > 2. In ${LINUX_ROOT}/init/main.c -> init(), after > prepare_namespace (which basically does the inintrd > mount), open syscall on '/dev/console' fails. But > still control goes further and executes > 'execve("/bin/sh")'. My question is where does the > output of /bin/sh execution goes? Not to my dumb > terminal? I see nothing. Infact my dumb terminal just > stops there. No kernel panic. Any clues? Solve problems sequentially. Why does open '/dev/console' fail ? > Note: In my case i do not have enough infrastructure > to have the standard NS16550 is working. So i have to > port some other driver as my serial driver. ANything > related to this? There may be some other problems. Sorry for being vague - I'm as precise as you are with your statement about "some other driver". If you want helpful answers you must provide all the little details. Best regards, Wolfgang Denk -- Software Engineering: Embedded and Realtime Systems, Embedded Linux Phone: (+49)-8142-4596-87 Fax: (+49)-8142-4596-88 Email: wd@denx.de "Probably the best operating system in the world is the [operating system] made for the PDP-11 by Bell Laboratories." - Ted Nelson, October 1977 ** Sent via the linuxppc-embedded mail list. See http://lists.linuxppc.org/