{"id":678,"date":"2012-10-20T11:25:25","date_gmt":"2012-10-20T11:25:25","guid":{"rendered":"https:\/\/raspberry-projects.com\/pi\/?p=678"},"modified":"2024-01-31T13:17:53","modified_gmt":"2024-01-31T13:17:53","slug":"auto-running-programs","status":"publish","type":"post","link":"https:\/\/raspberry-projects.com\/pi\/pi-operating-systems\/raspbian\/auto-running-programs","title":{"rendered":"Auto Running Programs-Command Line"},"content":{"rendered":"

\nAuto running applications in the GUI
\n<\/h4>\n

\nSee here<\/a>\n<\/p>\n

\nAuto running terminal applications (non GUI)
\n<\/h4>\n

\nFirst ensure your program is executable by finding it in the file manager.  Right click on the file and select properties.  Select the permissions tab, check the ‘Make the file executable’ box and press OK.  Or from the command line use:\n<\/p>\n

\r\n\r\nsudo chmod +x \/home\/pi\/projects\/my_project.a\r\n<\/code><\/pre>\n
\nOr using a different tool set its chmod to 755 (rwxr-xr-x).  It doesn't matter if the user is root.\n<\/p>\n
\nDoesn't work?<\/strong><\/em>\n<\/p>\n
\nWe've found that when copying a new file to the rpi using WinSCP, changing its properties to 755 and verifying all is OK that if we kill the power and power up again the executable doesn't run.  However if we use sudo reboot at the command line it works as it should.  It seems there is some sort of caching action going on so after doing this use sudo reboot the first time rather than cycling the power!\n<\/p>\n
\nYou can setup the auto run using a script (see here<\/a>), or you can do it directly by editing the rc.local file:\n<\/p>\n
\r\n\r\nsudo nano \/etc\/rc.local\r\n<\/code><\/pre>\n
\n \n<\/p>\n
\nAfter the initial comments (lines beginning with '#') add the following lines:\n<\/p>\n
\r\n\r\n# Auto run our application\r\nsudo \/home\/pi\/projects\/my_project.a &\r\n<\/code><\/pre>\n
\n"sudo" assumes you want your application run with root user privileges (remove if not) and the "&" says do it in the background.\n<\/p>\n
\nSave it by pressing Ctrl+X, " Y", ENTER\n<\/p>\n
\nRe-boot your RPi and it will run.\n<\/p>\n
\nTo kill the program
\n<\/h4>\n
\nIf you need to kill your program running in the background you can use this\n<\/p>\n
\r\n\r\nsudo killall my_project.a\r\n<\/code><\/pre>\n
\nIf the program has auto run but is in a loop and you can't kill it!
\n<\/h5>\n
\nOften the keyboard interface to the RPi is still working even though you may not see what you type due to your program writing to the screen in the background.  Try typing your username and then password as you normally would at login and then the "sudo killall" above and it may well kill it\n<\/p>\n
\nRunning multiple things and also programs as a non root user
\n<\/h4>\n
\nYou can use brackets around multiple commands each separated by a ';' followed by the '&' to run the set of commands all in the background.\n<\/p>\n
\nIf you use the '&' you can also run multiple lines as each is run in the background.\n<\/p>\n
\nFinally, by default rc.local runs as the root user.  You can change to a different user using su – USERNAME -c before the command and surrounding it with quotes.\n<\/p>\n
\nIn the example below the following occurs:\n<\/p>\n
\nAfter a 2 second pause my_project.a us run in the background.\n<\/p>\n
\nAfter a 5 second delay VLC is started to stream the raspberry pi video camera.  VLC won't run as the root user so su -c is used to make it run as the user "pi"\n<\/p>\n
\r\n\r\n#Auto run our application\r\n(sleep 2;sudo \/home\/pi\/projects\/my_project\/my_project.a)&\r\n#Auto run VLC video streaming\r\n(sleep 5;su - pi -c "raspivid -o - -t 0 -n -w 640 -h 480 -fps 15 | cvlc -vvv stream:\/\/\/dev\/stdin --sout '#rtp{sdp=rtsp:\/\/:8554\/}' :demux=h264")&\r\n<\/code><\/pre>\n
\n <\/p>\n","protected":false},"excerpt":{"rendered":"
Auto running applications in the GUI See here Auto running terminal applications (non GUI) First ensure your program is executable by finding it in the file manager.  Right click on the file and select properties.  Select the permissions tab, check the ‘Make the file executable’ box and press OK.  Or from the command line use: sudo chmod […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[187,11],"tags":[],"class_list":["post-678","post","type-post","status-publish","format-standard","hentry","category-application-control","category-raspbian"],"_links":{"self":[{"href":"https:\/\/raspberry-projects.com\/pi\/wp-json\/wp\/v2\/posts\/678","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/raspberry-projects.com\/pi\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/raspberry-projects.com\/pi\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/raspberry-projects.com\/pi\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/raspberry-projects.com\/pi\/wp-json\/wp\/v2\/comments?post=678"}],"version-history":[{"count":25,"href":"https:\/\/raspberry-projects.com\/pi\/wp-json\/wp\/v2\/posts\/678\/revisions"}],"predecessor-version":[{"id":3730,"href":"https:\/\/raspberry-projects.com\/pi\/wp-json\/wp\/v2\/posts\/678\/revisions\/3730"}],"wp:attachment":[{"href":"https:\/\/raspberry-projects.com\/pi\/wp-json\/wp\/v2\/media?parent=678"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/raspberry-projects.com\/pi\/wp-json\/wp\/v2\/categories?post=678"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/raspberry-projects.com\/pi\/wp-json\/wp\/v2\/tags?post=678"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}