06-06-2005
line by line file comparison
I have sifted through many past posts but have not found a good solution.
I have a 2 files that hold a filename and its cksum value like this:
FILE1 contents:
45435347589 filename1
FILE1 is from the directory structure of one host and FILE2 is generated from a rsh: host2 cksum command.
I would like to find an efficient way to compare each line at a time. So if
line1:file1 is not equal to line1:file2 I can report a mismatch. To throw another challenge some of the filenames contain a '$'. Something that java does to define inner classes. So there are some that look like:
343243473 file$name.class
Grep and RSH does not like the '$'. So I execute a script on the second host, to generate the FILE2 and then copy it over to host1 to do the comparison. Is there a way to esacpe the dollar when rsh'ing? So, I guess my question is how to efficiently loop through both files to compare or alternatively how to make the rsh escape the '$' in the filename so I don't have to have 2 separate scripts on 2 different hosts.
Thanks for you input
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RSH(1) BSD General Commands Manual RSH(1)
NAME
rsh -- remote shell
SYNOPSIS
rsh [-46dn] [-l username] [-p port] host [command]
rsh [-46dn] [-p port] username@host [command]
DESCRIPTION
rsh executes command on host.
rsh copies its standard input to the remote command, the standard output of the remote command to its standard output, and the standard error
of the remote command to its standard error. Interrupt, quit and terminate signals are propagated to the remote command; rsh normally termi-
nates when the remote command does. The options are as follows:
-4 Use IPv4 addresses only.
-6 Use IPv6 addresses only.
-d The -d option turns on socket debugging (using setsockopt(2)) on the TCP sockets used for communication with the remote host.
-l username By default, the remote username is the same as the local username. The -l option or the username@host format allow the remote
name to be specified.
-n The -n option redirects input from the special device /dev/null (see the BUGS section of this manual page).
-p port Uses the given port instead of the one assigned to the service ``shell''. May be given either as symbolic name or as number.
If no command is given, note that rlogin(1) is started, which may need a different daemon (rlogind(8) instead of rshd(8)) run-
ning on the server; you want to pass the rshd(8) port number in that case.
If no command is specified, you will be logged in on the remote host using rlogin(1).
Shell metacharacters which are not quoted are interpreted on local machine, while quoted metacharacters are interpreted on the remote
machine. For example, the command
rsh otherhost cat remotefile >> localfile
appends the remote file remotefile to the local file localfile, while
rsh otherhost cat remotefile ">>" other_remotefile
appends remotefile to other_remotefile.
FILES
/etc/hosts
SEE ALSO
rcmd(1), rlogin(1), rcmd(3), hosts.equiv(5), rhosts(5), environ(7)
HISTORY
The rsh command appeared in 4.2BSD.
BUGS
If you are using csh(1) and put a rsh in the background without redirecting its input away from the terminal, it will block even if no reads
are posted by the remote command. If no input is desired you should redirect the input of rsh to /dev/null using the -n option.
You cannot run an interactive command (like rogue(6) or vi(1)) using rsh; use rlogin(1) instead.
Stop signals stop the local rsh process only; this is arguably wrong, but currently hard to fix for reasons too complicated to explain here.
BSD
March 9, 2005 BSD