Input for Command Groups

Mirdarthos · 22 February 2024 07:40

Hi All

I was wondering if there is a way for me to capture input, or to put it differently have interactive command groups such as commands grouped by {}? From what I understand,() won’t work as it runs in a subshell. Or I’m missing something, which is also a distinct possibility.

Edit:

Heh. Just realized that this might be the dreaded XY Problem persconified.

So let me rather ask if there is a way to capture the eventual visible output of a command. Not the [50%] transformed, or overwritten to [52%]. Not the steps in-between, in other words.

zbe · 22 February 2024 08:11

Perhaps it would be easier if you tell us exactly where you need to capture output from.

Mirdarthos · 22 February 2024 08:14

I’m trying to capture the eventual visible output of

pamac update

So when it has completed.

cscs · 22 February 2024 08:43

With no other parameters then simple enough, ex

pamac update > pamac.txt

Or to ex, only capture the last line you can pipe it as well, ex

pamac update | tail -n1 > pamaclastline.txt

(and, ex cat pamac.txt)

Mirdarthos · 22 February 2024 09:19

Thank you! I’ll give it a go. I quite obviously tried to make it too complicated…

Edit:

But what about:

pamac update --aur

…then? Will that work the same? I don’t see why not, but you mentioned with no other parameters and those are, I think, so just making sure.

zbe · 22 February 2024 09:30

Or perhaps you mean something like

pamac update | tee >(sed -e 's/.*\r//' >filtered.txt)

Mirdarthos · 22 February 2024 09:34

I’ll give it a go when I get back.

Mirdarthos · 8 March 2024 09:45

OK, so I’ve got some feedback:

This caused the script to hang indefinitely. I killed it with:

kill -9 <pid>

As my own user, not root.

This caused the visual part to tun perfectly. Everything looked good, until I inspected the logs.

The command on line #367 is:

PAMAC_CLI_AUTH=1 pamac upgrade --force-refresh --enable-downgrade --no-aur | tee >(sed -e 's/.*\r//' >"${SYSDUPLOGFILE}")

And that resulted in this log file:

$ cat /var/log/mumuh/logs.2024.03.08@09h30m/system-upgrade.output                                                                                                                                                                                     1 ↵
[2024.03.08@09:30:S]: 314 Official packages to upgrade:

Eyhyich is just the first line of the output, as far as I can tell.

Line #389 of the script is:

PAMAC_CLI_AUTH=1 pamac upgrade --enable-downgrade --aur --devel | tee >(sed -e 's/.*\r//' >"${SYSDUPLOGFILE}")

Which resulted in this logfile:

$ cat /var/log/mumuh/logs.2024.03.08@09h30m/aur-upgrade.output

So it seems I am, quite obviously, missing something, somewhere. Sadly I don’t know what or where, though.

So if anyone wants to take a look, please do so. I just don’t know anymore.

The file is located here:

github.com

Mirdarthos/manjaro-update-helper/blob/master/src/usr/bin/mumuh

#!/bin/env bash
# Trap ctrl-c and call ctrl_c()
trap ctrl_c INT
# The custom handler for CTRL-C Presses
function ctrl_c() {
    printf '\n%s\n' "${TEXTFORMATTING[BRIGHT]}Enabling sleep, hibernate and suspend.${TEXTFORMATTING[NORMAL]}"
    # Disabling sleep
    if [[ $(sudo systemctl unmask sleep.target) -eq 0 ]];
    then
        printf '%s\n' "${TEXTFORMATTING[BRIGHT]}${TEXTFORMATTING[YELLOW]}Successfully enabled sleep functionality.${TEXTFORMATTING[NORMAL]}"
    else
        printf '%s\n' "${TEXTFORMATTING[BRIGHT]}${TEXTFORMATTING[RED]}An error occured while enabling sleep functionality.${TEXTFORMATTING[NORMAL]}"
    fi

    # Enabling suspend
    if [[ $(sudo systemctl unmask suspend.target) -eq 0 ]];
    then
        printf '%s\n' "${TEXTFORMATTING[BRIGHT]}${TEXTFORMATTING[YELLOW]}Successfully enabled suspend functionality.${TEXTFORMATTING[NORMAL]}"
    else
        printf '%s\n' "${TEXTFORMATTING[BRIGHT]}${TEXTFORMATTING[RED]}An error occured while enabling suspend functionality.${TEXTFORMATTING[NORMAL]}"

This file has been truncated. show original

cscs · 8 March 2024 23:23

Maybe use something like

>&1 | tee "${SYSDUPLOGFILE}"

ex:

PAMAC_CLI_AUTH=1 pamac upgrade --force-refresh --enable-downgrade --no-aur >&1 | tee "${SYSDUPLOGFILE}"

Mirdarthos · 9 March 2024 06:15

I also, yesterday late, thought of something like this. More specifically, redirecting only File Descriptor 1.

So I’ll give it a whirl, and provide the feedback, thank you!

Edit:

Seems to be working with today’s update, thanks @cscs! I will check it again next update and make doubly-sure, but it seems to work!

system · 13 March 2024 08:32

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