Linux，检查是否创建了临时文件然后将其删除

Question

I am trying to debug a problem on my server with wkhtmltopdf on a Django application.

The command generated to run wkhtml is pointing at a file in /tmp/.

wkhtmltopdf.sh --encoding utf8--quiet/tmp/wkhtmltopdffa46k_h8.html -

Is there an easy way to check if the file gets created in /tmp then deleted? (As it isn't present after the web request has completed).

Answer 1

The tool to debug such things is called strace . Run:

strace -f wkhtmltopdf.sh --encoding utf8--quiet/tmp/wkhtmltopdffa46k_h8.html

Explanation:

A program in order to create, write, close, delete a file needs to call kernel code in order to achieve that. This kernel functions are called system calls . strace will run the program and prints any system call the command makes to stderr(!).

This might give you a little bit too much information if you read it unfiltered. If you want to grep for the filename of the tempfile, keep in mind that strace writes to stderr:

strace -f program ... 2>&1 | grep filename

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PS: Alternatively inotifywait from the package inotify-tools can be used:

inotifywait -m --format "%e %f" /tmp

Better explained here: https://unix.stackexchange.com/a/164801/45365

Answer 2

尝试使用

watch -n0,1 "ls -lrt /tmpdir/ | tail"