Check that entire list of files exist via ssh and condition if so

Question

I have a list of files that must exist in a remote directory before I send out a confirmation email. For example, my list is: file_list=example.txt testfile.txt. I know how to test if each individual file exists as such:

ssh [email protected] "test -e /path/to/file/example.txt"
if [ $? -eq 0 ]; then
    echo -e "Email body" | mail -s "File exists." "[email protected]"
fi

But how can I hit each file in the list and confirm that all files exist in this remote directory? Say three out of four were successfully pushed via sftp, I'd need to exit with an e-mail error to my group only saying go check it out rather than proceeding to email the client that all files are available. The logic is perhaps something like:

ssh [email protected] "test - [$file_list]"
if [they all exist]; then
  successful -- email the client
else
  error -- email your group
  exit
fi

Answer 1

You could try to set up an array on the remote side of a single ssh connection and loop through it; if the list of files is static and you can drop a shell script on the remote side, calling it may be easiest. Otherwise, you could set the array up locally and loop over it, ssh'ing in each time to test for the file's existence:

files=(example.txt testfile.txt)
ok=0
for file in "${files[@]}"
do
  ssh [email protected] test -e "$file" && ((ok++))
done
if [ $ok -eq ${#files[@]} ]
then
  success, all $ok files made it
else
  failure, only $ok files made it
fi

Answer 2

Set the variable file and file1 and add the names of the files.

file="/path/to/testfile.txt"
file1="/path/to/example.txt"

ssh [email protected]
if [[ -f "$file" && -f "$file1" ]]; then
    echo -e "Email body" | mail -s "File exists." "[email protected]"
else
  echo -e "Email body" | mail -s "File does not exists." "[email protected]"
  exit
fi

-f : Return true value if file exists and is a regular file.