问题
I'm looking for a little shell script that will take anything piped into it, and dump it to a file.. for email debugging purposes. Any ideas?
回答1:
The unix command tee does this.
man tee
回答2:
cat > FILENAME
回答3:
You're not alone in needing something similar... in fact, someone wanted that functionality decades ago and developed tee :-)
Of course, you can redirect stdout directly to a file in any shell using the > character:
echo "hello, world!" > the-file.txt
回答4:
The standard unix tool tee can do this. It copies input to output, while also logging it to a file.
回答5:
Use Procmail. Procmail is your friend. Procmail is made for this sort of thing.
回答6:
If you want to analyze it in the script:
while /bin/true; do
read LINE
echo $LINE > $OUTPUT
done
But you can simply use cat. If cat gets something on the stdin, it will echo it to the stdout, so you'll have to pipe it to cat >$OUTPUT. These will do the same. The second works for binary data also.
回答7:
If you want a shell script, try this:
#!/bin/sh
exec cat >/path/to/file
回答8:
If exim or sendmail is what's writing into the pipe, then procmail is a good answer because it'll give you file locking/serialization and you can put it all in the same file.
If you just want to write into a file, then - tee > /tmp/log.$$ or - cat > /tmp/log.$$ might be good enough.
回答9:
Use <<command>> | tee <<file>> for piping a command <<command>> into a file <<file>>.
This will also show the output.
回答10:
Huh? I guess, I don't get the question?
Can't you just end your pipe into a >> ~file
For example
echo "Foobar" >> /home/mo/dumpfile
will append Foobar to the dumpfile (and create dumpfile if necessary). No need for a shell script... Is that what you were looking for?
回答11:
if you don't care about outputting the result
cat - > filename
or
cat > filename
来源：https://stackoverflow.com/questions/76700/whats-a-simple-method-to-dump-pipe-input-to-a-file-linux