Daemonize a command and e-mail the results
Project description
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daemail (pronounced “DEE-mayl”, like “e-mail” but with a D) is a Python script built on top of python-daemon for running a normally-foreground command in the background and e-mailing its output (by default, the combined stdout and stderr) once it’s done.
Installation
daemail requires Python 3.6 or higher. Just use pip for Python 3 (You have pip, right?) to install daemail and its dependencies:
python3 -m pip install daemail
Usage
daemail [<options>] <command> [<arg> ...]
daemail runs command with the given arguments in the background and sends an e-mail once the command finishes. The sending of the e-mail is performed by the outgoing library, and thus an outgoing configuration file must be created with settings for sending e-mail before daemail can be used.
Options
- -c FILE, --config FILE
Read sending configuration for the outgoing library from FILE; defaults to outgoing’s default configuration file
- -C DIR, --chdir DIR
Change to DIR after daemonizing but before running the command; defaults to the current directory
- -D MBOX, --dead-letter MBOX
If an error occurs when trying to send, append the e-mail (including a description of the error) to the file MBOX; defaults to dead.letter. If the file already exists, it must be a valid mbox file.
- -e ENCODING, --encoding ENCODING
Expect the stdout (and stderr, if --split is not in effect) of the command to be in the given encoding; defaults to the preferred encoding returned by Python’s locale.getpreferredencoding. If decoding fails, the output will be attached to the e-mail as an application/octet-stream file named “stdout”.
When --mime-type or --stdout-filename is also given, this option has no effect other than to set the default value for --stderr-encoding.
- -E ENCODING, --stderr-encoding ENCODING
Expect the stderr of the command to be in the given encoding; defaults to the value specified via --encoding or its default. If decoding fails, the stderr output will be attached to the e-mail as an application/octet-stream file named “stderr”.
This option only has an effect when --split is given, either implicitly or explicitly.
- --foreground, --fg
Run everything in the foreground instead of daemonizing. Note that command output will still be captured rather than displayed.
- -f ADDRESS, --from ADDRESS, --from-addr ADDRESS
Set the From: address of the e-mail. The address may be given in either the form “address@example.com” or “Real Name <address@example.com>.” If not specified, daemail will not set the From: header and will expect the mail command or SMTP server to do it instead.
- -F, --failure-only
Only send an e-mail if the command failed to run or exited with a nonzero status
- -l LOGFILE, --logfile LOGFILE
If an unexpected & unhandleable fatal error occurs after daemonization, append a report to LOGFILE; defaults to daemail.log
Such an error is a deficiency in the program; please report it!
- -M MIME-TYPE, --mime-type MIME-TYPE, --mime MIME-TYPE
Attach the standard output of the command to the e-mail as an inline attachment with the given MIME type. The MIME type may include parameters, e.g., --mime-type "text/html; charset=utf-16". If --stdout-filename is not also supplied, the attachment is named “stdout”. Implies --split.
- -n, --nonempty
Do not send an e-mail if the command exited successfully and both the command’s stdout & stderr were empty or not captured
- --no-stdout
Don’t capture the command’s stdout; implies --split
- --no-stderr
Don’t capture the command’s stderr; implies --split
- -S, --split
Capture the command’s stdout and stderr separately rather than as a single stream
- --stdout-filename FILENAME
Attach the standard output of the command to the e-mail as an inline attachment with the given filename. If --mime-type is not also supplied, the MIME type of the attachment is deduced from the file extension, falling back to application/octet-stream for unknown extensions. Implies --split.
- -t ADDRESS, --to ADDRESS, --to-addr ADDRESS
Set the recipient of the e-mail. The address may be given in either the form “address@example.com” or “Real Name <address@example.com>.”
This option is required. It may be given multiple times in order to specify multiple recipients.
- -Z, --utc
Show start & end times in UTC instead of local time
Caveats
Input cannot be piped to the command, as standard input is closed when daemonizing. If you really need to pass data on standard input, run a shell, e.g.:
daemail bash -c 'command < file'
or:
daemail bash -c 'command | other-command'
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