uart_control on Pi 4 returns 'File name too long' error

[samuel-pratt]

Running sudo ./uart_control gpio on Raspberry pi 4 returns a File name too long error.

Steps before this were:
wget https://github.com/itemir/rpi_boat_utils/raw/master/uart_control/uart_control
chmod +x ./uart_control
sudo ./uart_control gpio

Trying to make it work with a daisy hat.

Full error message (very long) is below:
./uart_control: 1: {payload:{allShortcutsEnabled:false,path:uart_control,repo:{id:79987790,defaultBranch:master,name:rpi_boat_utils,ownerLogin:itemir,currentUserCanPush:false,isFork:false,isEmpty:false,createdAt:2017-01-25T06:04:28.000Z,ownerAvatar:https://avatars.githubusercontent.com/u/8331463?v=4,public:true,private:false,isOrgOwned:false},currentUser:null,refInfo:{name:master,listCacheKey:v0:1485324268.0,canEdit:false,refType:branch,currentOid:7f35bc67053736bb30b54bacd40d8188901a0252},tree:{items:[{name:README.md,path:uart_control/README.md,contentType:file},{name:uart_control,path:uart_control/uart_control,contentType:file}],templateDirectorySuggestionUrl:null,readme:{displayName:README.md,richText:<article class="markdown-body entry-content container-lg" itemprop="text"><h2 tabindex="-1" id="user-content-uart_control" dir="auto"><a class="heading-link" href="#uart_control">uart_control<svg class="octicon octicon-link" viewBox="0 0 16 16" version="1.1" width="16" height="16" aria-hidden="true"><path d="m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z"></path></svg></a></h2>\n<p dir="auto">Allows auto configuration of UART. UART is normally used by the console on Raspberry Pi 0, 1 and 2. On Raspberry Pi 3, UART is used by the Bluetooth module and console is assigned to a software based UART known as mini UART. Many custom boards require access to UART via GPIO pins 14 and 15. This requires a set of configuration changes that differ per platform. This command line utility allows making UART available to custom applications.</p>\n<div class="snippet-clipboard-content notranslate position-relative overflow-auto" data-snippet-clipboard-copy-content="$ sudo ./uart_control\nUsage:\n ./uart_control [ OPTION ]\n default Restores original state\n gpio Makes UART available on GPIO pins 14 &amp; 15\n status Displays current status\n$"><pre class="notranslate"><code>$ sudo ./uart_control\nUsage:\n ./uart_control [ OPTION ]\n default Restores original state\n gpio Makes UART available on GPIO pins 14 &amp; 15\n status Displays current status\n$\n</code></pre></div>\n<p dir="auto">You can see the status of UART with the status option:</p>\n<div class="snippet-clipboard-content notranslate position-relative overflow-auto" data-snippet-clipboard-copy-content="$ sudo ./uart_control status\nConsole : disabled\nUART : enabled\nBluetooth : enabled\n\nUART is available to GPIO 14 &amp; 15.\n$"><pre class="notranslate"><code>$ sudo ./uart_control status\nConsole : disabled\nUART : enabled\nBluetooth : enabled\n\nUART is available to GPIO 14 &amp; 15.\n$\n</code></pre></div>\n<p dir="auto">gpio option makes the UART available to GPIO pins 14 and 15:</p >\n<div class="snippet-clipboard-content notranslate position-relative overflow-auto" d ata-snippet-clipboard-copy-content="$ sudo ./uart_control gpio\nEnabling UART.\nDisabling console on UART.\nDisabling Bluetooth.\nRemoved symlink /etc/systemd/system/multi-user.target.wants/hciuart.service.\n\nUART made available on GPIO 14 &amp; 15.\nYou now need to reboot.\n$"><pre class="notranslate"><code>$ sudo ./uart_control gpio\nEnabling UART.\nDisabling console on UART.\nDisabling Bluetooth.\nRemoved symlink /etc/systemd/system/multi-user.target.wants/hciuart.service.\n\nUART made available on GPIO 14 &amp; 15.\nYou now need to reboot.\n$\n</code></pre></div>\n<p dir="auto">default option changes the state back to its original:</p>\n<div class="snippet-clipboard-content notranslate position-relative overflow-auto" data-snippet-clipboard-copy-content="$ sudo ./uart_control default\nEnabling UART.\nEnabling console on UART.\nEnabling Bluetooth.\nCreated symlink from /etc/systemd/system/multi-user.target.wants/hciuart.service to /lib/systemd/system/hciuart.service.\n\nDefault system settings restored.\nYou now need to reboot.\n$"><pre class="notranslate"><code>$ sudo ./uart_control default\nEnabling UART.\nEnabling console on UART.\nEnabling Bluetooth.\nCreated symlink from /etc/systemd/system/multi-user.target.wants/hciuart.service to /lib/systemd/system/hciuart.service.\n\nDefault system settings restored.\nYou now need to reboot.\n$\n</code></pre></div>\n</article>,errorMessage:null,headerInfo:{toc:[{level:2,text:uart_control,anchor:uart_control,htmlText:uart_control}],siteNavLoginPath:/login?return_to=https%3A%2F%2Fgithub.com%2Fitemir%2Frpi_boat_utils%2Ftree%2Fmaster%2Fuart_control}},totalCount:2,showBranchInfobar:false},fileTree:{:{items:[{name:aisd,path:aisd,contentType:directory},{name:aisplay,path:aisplay,contentType:directory},{name:charts_to_mbtiles,path:charts_to_mbtiles,contentType:directory},{name:dometic_to_voltage,path:dometic_to_voltage,contentType:directory},{name:gpsd2nmea,path:gpsd2nmea,contentType:directory},{name:monitoringd,path:monitoringd,contentType:directory},{name:sensord,path:sensord,contentType:directory},{name:traffic_counter,path:traffic_counter,contentType:directory},{name:uart_control,path:uart_control,contentType:directory},{name:.gitignore,path:.gitignore,contentType:file},{name:LICENSE,path:LICENSE,contentType:file},{name:README.md,path:README.md,contentType:file}],totalCount:12}},fileTreeProcessingTime:2.761526,foldersToFetch:[],treeExpanded:true,symbolsExpanded:false,csrf_tokens:{/itemir/rpi_boat_utils/branches:{post:u8earMWNffgFpp0ZiKsu5XURkfJ9IbhjwkxWXoDNd5JOP-vDTR3482amMti8YJeXYkZUxlM0Ji6YjV8Y8Z-Zrg},/itemir/rpi_boat_utils/branches/fetch_and_merge/master:{post:5SMVu8fUO066iIumc1gHA3LT70vOHBVo7IEOm2Tio6o4UNKtRxj2izDL1h4bMcm3OxV9ujkVWkw-TzhlV0EFUQ},/itemir/rpi_boat_utils/branches/fetch_and_merge/master?discard_changes=true:{post:idGejCGkm2rJu0YuNwLG3y2jN7OK0vkQbJFrHvJkkKpUolmaoWhWr0P4G5ZfawhrZGWlQn3btjS-X13gwcc2UQ}}},title:rpi_boat_utils/uart_control at master · itemir/rpi_boat_utils}: File name too long

[astuder]

based on the error message, it looks like the uart_control file isn't the shell script but some JSON or HTML response from Github. Try to run the wget command again.

You can check the script by running cat uart_control. The output should look something like this:

#!/bin/sh
#
# Copyright (c) 2017 Ilker Temir <ilker@ilkertemir.com>

[...]

printf "      gpio    Makes UART available on GPIO pins 14 & 15\n"
printf "      status  Displays current status\n"