I'm in the windows environment and I need my program to be able to run a CMD command as an administrator...
when I try to run via System.cmd the exception return is
message: Unable to remove service (not enough privileges?)
Edit:
Using iex -S mix the program works normally
but when I generate the release and work erlsrv
https://www.erlang.org/doc/man/erlsrv.html
it is installed as a service on windows but a service without permissions to run on CMD
Typically, this is solved by giving your user a permission to run the program under your user with sudo without a password.
In /etc/sudoers:
your_user ALL = NOPASSWD: /usr/bin/service_to_run
Then in your elixir application:
System.cmd("sudo", ["/usr/bin/service_to_run"], env: [{"FOO", "bar"}])
Related
im want to use lua to reset one of the openwrt`s Linux services . when i use below command in Linux directly and it works :
$ service
it shows below services
when i type below command it shows me more options :
$ service led
finally when i type below command it resets the service .
$ service led restart
but with lua`s below program i got error .
>os.execute("service led restart")
sh: service: not found
is there any other library or command to access services ?
command -V service says:
service is a function
To be able to invoke it in a subshell created by os.execute you have to source the script which creates the function. (I don't know where this function was defined).
The more easy way is to invoke the specific service executable:
os.execute"/etc/init.d/led restart"
The field Exec command of execute shell over ssh, I only put command sudo su in there.
But when I build the project, it always stop at the command sudo su till timeout.
The image show what I get in console output.
Welcome to StackOverflow.
sudo
sudo is used for custom installations, system files modification, etc
Interactive shells (human in front of monitor)
When you exec some command preceded by sudo, this shell will ask you for the password of some privileged user. This ask event waits for user response:
Background executions
Some process, crons, scripts or applications like jenkins needs to execute sudo commands. But in this mode , there is no way to enter the password. This is the reason of your timeout
Solutions
disable requiretty
https://gist.github.com/jrichardsz/1adaaa07885b45d497b519431701a943
Security risk of this approach:
https://unix.stackexchange.com/a/65789/188975
use a pseudo TTY in Jenkins
https://unix.stackexchange.com/a/373843/188975
You can try using the expect directive.
I'm just recently started to using the Windows Subsystem for Linux. I was trying to install Angular and ran into an error. I found a potential solution, but I don't understand part of the solution. In the script bellow, what do the keywords USER, ENV, and RUN mean, and what are they called? I tried running "USER node" and i got an error
USER node
RUN mkdir /home/node/.npm-global
ENV PATH=/home/node/.npm-global/bin:$PATH
ENV NPM_CONFIG_PREFIX=/home/node/.npm-global
RUN npm install -g #angular/cli
Here is the entire answer in case you need more context https://github.com/angular/angular-cli/issues/7389
USER sets a username to use when executing commands that follow later in Dockerfile. See Dockerfile docs
That is not a script. Those directives have no meaning in Ubuntu.
That is a dockerfile. It is used by Docker to build images.
I want to run a Ruby on Rails application. When I tried to run it, it shows me this,
The program 'rails' is currently not installed. You can install it by typing:
sudo apt install ruby-railties
So, I figured out the problem and I found that the problem is due to not login into bash shell. My terminal could not execute 'ruby' or 'ruby on rails' scripts. I checked .bashrc and .bash_profile files if PATH variable is set to point to rvm file.
When I did,
/bash/bin -l
it shows me ruby or rails are installed on system and I could start Rails server successfully. But if I opened another Terminal window, same problem occurs. Basically, I want to log into bash shell by default. Please correct and help me to sort out this. Thanks!
If you are sure the location of your bash shell is /bin/bash you could use this command (replacing "username" with your username):
chsh -s /bin/bash username
That will change your default shell in most unix like operating systems.
Afterwards you can verify it checking /etc/passwd where you will see the default shell at the end of the line of your username.
Warning: Try it first with a new user, in order to avoid losing your shell access if the path to bash is different :-)
I'm developing for jailbroken devices, and have gotten Xcode building and debugging workin on device with a self signed certificate and some edits to Xcode.
But the app I'm developing requires being able to call setuid(0), thus it needs to have chmod +s in order to run properly.
Apart from this iOS apps that needs to run as root need a bash script to invoke it like such:
#!/bin/bash
dir=$(dirname "$0")
exec "${dir}"/App\ Binary_ "$#"
So, I need this build script to run on building my app:
cd ${BUILT_PRODUCTS_DIR}/My\ App.app/
mv App_Binary App_Binary_
cp /Users/john/Shellscript Binary_App
chmod +s Binary_App_
chmod +x Binary_App
I've tried adding this as a normal build script, and as a part of the scheme as both a Build post-action or a Run Pre-action. Neither which has worked. For example a post-action script on build returns that code signing failed, since it tries to codesign App Binary that is now the shell script. If I do it as a pre-action script on Run it displays "Xcode cannot run using the selected device.Choose a destination with a supported architecture in order to run on this device."
What should I do?
I use a post-action script to build my jailbreak apps. Although they don't need an additional chmod or bash script to run, you could use a script like mine to install your app (as a system app, not a normal App Store app) using ssh, then perform the chmod command and swapping the binary with a bash script on device via the post-action script.
You could try something along these lines (I tried to use the details from your script, but there may be one or two mistakes):
# copy binary
scp -P $PORT -r $BUILT_PRODUCTS_DIR/${WRAPPER_NAME} root#$IPOD://private/var/stash/Applications/${WRAPPER_NAME}/App_Binary_
# copy script
scp -P $PORT /Users/john/Shellscript root#$IPOD://private/var/stash/Applications/${WRAPPER_NAME}/Binary_App
# set special permissions
ssh -p $PORT root#$IPOD "chmod +s /private/var/stash/Applications/${WRAPPER_NAME}/Binary_App_"
ssh -p $PORT root#$IPOD "chmod +x /private/var/stash/Applications/${WRAPPER_NAME}/Binary_App"
Set IPOD and PORT as appropriate. ${WRAPPER_NAME} is the name of the app as saved on disk, with the .app extension.
Actually, this could be done if you need your app to be installed as a normal App Store app as well, you'd just need to find out where it's been installed to and adjust the paths as appropriate.
You'll obviously need to have SSH installed and activated on your device (available on Cydia).