Why does ftp script fail with /home/dbadmin is a directory error?

Question

Given the following script

ftp -n $HOST <<END_SCRIPT
quote USER $USER
quote PASS $PASSWD
cd /home/dbadmin/backup
mput *.gz
quit
END_SCRIPT

the mput *.gz from a directory /backups that contains *.gz files, results in this error:

mput t1.gz? mput t2.gz? ./temp.sh: line 14: /home/dbadmin: is a directory

I am not sure how to change the script without putting individual file names. I want to mput all files in this directory.

By putting an exit 0 after END_SCRIPT, the error disappeared, and I am interested in why this happened.

Answer 1

What about to replace mput to generated put?

ftp -n $HOST <<END_SCRIPT
quote USER $USER
quote PASS $PASSWD
cd /home/dbadmin/backup
$(find *.gz -maxdepth 0 -type f -printf 'put %p\n')
quit
END_SCRIPT

How it works:

When HERE-IS-DOCUMENT will be resolved, find *.gz ... will generate multiple lines for each file found by mask *.gz:

put 1.gz
put 2.gz
...

and your script content that will be executed by ftp will be like that:

quote USER your_user_name
quote PASS your_passwd
cd /home/dbadmin/backup
put 1.gz
put 2.gz
...
quit

Regarding /home/dbadmin: Is a directory I belive you have single line /home/dbadmin in your script (or something like $SOME_COMMAND /home/dbadmin).