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03-01-2006
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Capturing shell script command output
I am trying to check to see if a file exists on a ftp server, well, I know that cant be done, atleast directly, So I came up with this small script
Quote:
Code:
ftp -n $HOST <<END_SCRIPT quote USER $USER quote PASS $PASSWD cd public_html/crap dir $FILE quit END_SCRIPT Quote:
Code:
{
ftp -n $HOST <<END_SCRIPT
quote USER $USER
quote PASS $PASSWD
cd public_html/crap
dir $FILE
quit
END_SCRIPT
} > $CHECK_FILE
if $CHECK_FILE = 0 {
# file does not exist, lets upload the file to the server
}
else {
# file exists on the server, rename the file on server before uploading
}
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03-01-2006
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What language you you trying to use? In the bourne, ksh, bash type shells, you do stuff like this:
FILE=/tmp/output.txt date > $FILE This does not change the value of FILE. In your first script you are using a here-document. The last line of your script is the end of the here-document. It does not need to be the end of the script. You can keep on going and do more stuff. Go to our FAQ section and read the article on automating ftp jobs. There are a lot of examples there.
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03-01-2006
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I am using bourne shell.
I did go on the FAQ site but I dont see an example in which we are trying to capture output generated by a script commands into a variable. Notice the bold S!  . What I mean is, I need to capture output fromt the ftp command dir $FILE as this will tell me if the file exists on the ftp server.
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