---
name: "gpionotify"
section: "1"
platform: "linux"
package: "libgpiod"
version: "2.3.1-1"
release: "Arch Linux 2026-11-01"
platforms: ["linux"]
url: "https://new.carta.tech/gpionotify"
---

# gpionotify(1)

libgpiod command-line utility

## NAME

gpionotify - libgpiod command-line utility

## SYNOPSIS

**gpionotify** \[*OPTIONS*\] *\<line\>*...

## DESCRIPTION

Wait for changes to info on GPIO lines and print them to standard output.

Lines are specified by name, or optionally by offset if the chip option is provided.

## OPTIONS

- **--banner**

  display a banner on successful startup

- **--by-name**

  treat lines as names even if they would parse as an offset

- **-c**, **--chip** \<chip\>

  restrict scope to a particular chip

- **-e**, **--event** \<event\>

  specify the events to monitor Possible values: 'requested', 'released', 'reconfigured'. (default is all events)

- **-h**, **--help**

  display this help and exit

- **-F**, **--format** \<fmt\>

  specify a custom output format

- **--idle-timeout** \<period\>

  exit gracefully if no events occur for the period specified

- **--localtime**

  convert event timestamps to local time

- **-n**, **--num-events** \<num\>

  exit after processing num events

- **-q**, **--quiet**

  don't generate any output

- **-s**, **--strict**

  abort if requested line names are not unique

- **--unquoted**

  don't quote line or consumer names

- **--utc**

  convert event timestamps to UTC

- **-v**, **--version**

  output version information and exit

### Chips:

-

  A GPIO chip may be identified by number, name, or path. e.g. '0', 'gpiochip0', and '/dev/gpiochip0' all refer to the same chip.

### Periods:

-

  Periods are taken as milliseconds unless units are specified. e.g. 10us. Supported units are 'm', 's', 'ms', and 'us' for minutes, seconds, milliseconds and microseconds respectively.

### Format specifiers:

- %o

  GPIO line offset

- %l

  GPIO line name

- %c

  GPIO chip name

- %e

  numeric info event type ('1' - requested, '2' - released or '3' - reconfigured)

- %E

  info event type ('requested', 'released' or 'reconfigured')

- %a

  line attributes

- %C

  consumer

- %S

  event timestamp as seconds

- %U

  event timestamp as UTC

- %L

  event timestamp as local time

## AUTHOR

Bartosz Golaszewski \<brgl@kernel.org\>

## REPORTING BUGS

Report bugs to:\
     Bartosz Golaszewski \<brgl@kernel.org\>\
     linux-gpio \<linux-gpio@vger.kernel.org\>

## COPYRIGHT

Copyright © 2017-2023 Bartosz Golaszewski License: GPL-2.0-or-later\
 This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law.