Remote file comparisions

[pingjocky]

I need to compare two files, on different machines. I download (copy) a file from the remote machine, then need to compare the one on my machine with the one on the remote box. If the files are different, then the script will need to download the file again and compare the two again.
Any ideas on how to do this. I have a script that sort of does it but I am getting errors with it...sometimes and it is pretty long.

pingjocky

 

[marsd]

That's the long way home.
Netcat is your friend for little things like this.

A more meticulous approach that uses gawk 3.1.0's
network capability is something like this:
##
function openFile(fname, arra,i) {
i=1
while ((getline < fname) > 0) {
mylist = length(mylist) < 1 ? $0&quot;\n&quot; : mylist&quot;\n&quot;$0&quot;\n&quot;
i++;
}
printf &quot;Read %d records\n&quot;, i
close(fname)
return mylist
}


function compFiles(arr1,arr2,len, x) {
for (x=0 ; x <= len ; x++) {
printf &quot;Comparing %s and %s\n&quot;, arr1[x], arr2[x]
if (arr1[x] != arr2[x]) {
return 0
}
}
return 1
}

function copytoFile(farray,xx, i) {
i=0
printf &quot;Filename(full path) to copy data to: &quot;
getline name < &quot;-&quot;
while (i <= xx) {
print farray >> name
i++
}
close(name)
return i
}

BEGIN {
port = 7700
if (ARGV[1] == &quot;client&quot; && ARGC == 3) {
printf &quot;Address of server: &quot;
getline add < &quot;-&quot;
plist = openFile(ARGV[2])
z = split(plist,clientfile,&quot;\n&quot
cnt = 1
sock = &quot;/inet/tcp/0/&quot; add &quot;/&quot; port
printf &quot;\r\n&quot; |& sock
while ((sock |& getline) > 0) {
serverfile[cnt++] = $0
}
close(sock)
printf &quot;Local file length = %d\n, remote file length = %d\n&quot;, z, cnt
if (z == cnt && (x = compFiles(clientfile,serverfile,z)) > 0) {
printf &quot;Files are the same\n&quot;
exit
} else {
printf &quot;Files are not the same\n&quot;
copytoFile(serverfile,cnt)
exit
}
} else if (ARGV[1] == &quot;server&quot; && ARGC == 3) {
flg = 1
plist = openFile(ARGV[2])
z = split(plist,serverfile,&quot;\n&quot
service = &quot;/inet/tcp/&quot; port &quot;/0/0&quot;
#feed the socket data
do {
fcnt = 0
#wait for the connect
while ((service |& getline) > 0 && fcnt++ <= z) {
printf plist |& service
print &quot;Sending&quot;, plist
close(service)
}
#close the connection
} while (flg == 1)
} else {
printf &quot;Improper args to script %s, %d\n&quot;, ARGV[1], ARGC
exit
}
}

Poor mans awk mmap and file server in 80 lines
Called like this for server:
gawk -f scriptname server &quot;filename1&quot;
gawk -f scriptname client &quot;filename2&quot;

You should be able to adapt the idea easily enough.
HTH