how to set timeout?


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# 1  
how to set timeout?

When I run a script where the 1st parameter is ip address
ftp -n -i -v $1

I hang here if the ip is wrong
how to set a timeout something like

if (20s not complete "ftp -n -i -v $1") then
echo "error"
fi

Thanks a lot.
# 2  
Why not check if it's a valid IP address with, say, ping before you attempt to connect?

Jerry
# 3  
Quote:
Originally Posted by JerryHone
Why not check if it's a valid IP address with, say, ping before you attempt to connect?

Jerry
Thanks for your advice.

The ip address could be pinged but the computer do not have open ftp / firewall any reason that can't connect through ftp and it hang for a very long while.

Any other solution? thanks.
# 4  
Quote:
Originally Posted by uativan
When I run a script where the 1st parameter is ip address
ftp -n -i -v $1

ftp is intended for interactive use, not scripts.

For scripts, use the ncftp suite of utilities.
# 5  
Quote:
Originally Posted by cfajohnson
ftp is intended for interactive use, not scripts.

For scripts, use the ncftp suite of utilities.
Thank you for your suggestion.

I replaced the "ftp -n -i -v ip" code to "ncftp -u user -p pass ip"
I want to list out the files of the folder from remote ftp
Before I use "ls . folders" to save the list to a local text file and then manipulate it.

Any other method to list out the files in folders and pass to a parameter?
thanks!
# 6  
Quote:
Originally Posted by uativan
I replaced the "ftp -n -i -v ip" code to "ncftp -u user -p pass ip"
I want to list out the files of the folder from remote ftp
Before I use "ls . folders" to save the list to a local text file and then manipulate it.

Any other method to list out the files in folders and pass to a parameter?

To list the files, use ncftpls. You can redirect the output to a file or use command substitution to save them in a variable.
# 7  
Quote:
Originally Posted by cfajohnson
To list the files, use ncftpls. You can redirect the output to a file or use command substitution to save them in a variable.
Thanks a lot.
I changed to use
list=$(ncftpls -u user -p pass -t 2 -x -l ftp://ip/)
echo "$list"

It works great.

Further question is how to split the lines into an array?
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