How to reboot the linux machine using C++ with path and command

Question

1.00/5 (1 vote)

See more:

Hi all,
I have a script file to reboot machine and i want to change it into a c++ program

<pre>echo "Reboot System"
			echo ""
			echo -n "This will end the demo.  Continue (Y/n)? "

			read continue
			echo ""
			if [ "$continue" != "n" ] && [ "$continue" != "N" ]; then
				cat <<-EOF
				Set reboot scope to System
				Command: echo system > /sys/firmware/zynqmp/shutdown_scope
				EOF

				echo `echo system > /sys/firmware/zynqmp/shutdown_scope`
				echo ""
				echo "Command: reboot"
				echo ""
				reboot
				while true; do
					read dummy
				done
			fi
			;;

What I have tried:

C++

<pre>/*

#include <stdio.h>
#include <stdlib.h>
#include <fcntl.h>
#include <unistd.h>
#include <string.h>
#include <iostream>


/*Function to display available options in this application*/


void Reboot_System()
{
    char option;
    printf("\nReboot System\n");
    printf(".................");
    printf("\n This will end the demo. Continue (Y/N)?");
    scanf("%c", &option);
    if (option ==  'y' || option == 'Y')
    {
        std::string sysfspath ("/sys/firmware/zynqmp/shutdown_scope");

        printf("\n Reboot\n");

    }


}


int main()
{

        printf("\nPower Management");
        printf("\n................");

        Reboot_System();

}

Posted 19-Jun-21 2:10am

Member 15253975

Updated 19-Jun-21 2:51am

v2

Add a Solution

1 solution

Add a Solution

Add your solution here

Treat my content as plain text, not as HTML

Preview 0

…

Existing Members

Sign in to your account

...or Join us

Download, Vote, Comment, Publish.

Your Email
Password
Forgot your password?

Your Email
This email is in use. Do you need your password?
Optional Password

I have read and agree to the Terms of Service and Privacy Policy
Please subscribe me to the CodeProject newsletters

When answering a question please:

Read the question carefully.
Understand that English isn't everyone's first language so be lenient of bad spelling and grammar.
If a question is poorly phrased then either ask for clarification, ignore it, or edit the question and fix the problem. Insults are not welcome.
Don't tell someone to read the manual. Chances are they have and don't get it. Provide an answer or move on to the next question.

Let's work to help developers, not make them feel stupid.

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

k5054 · Accepted Answer · 2021-06-19T02:51:00

Solution 1

Assuming y are on linux, you can use the reboot() system call: see here[^]
Alternatively, you can use the system() e.g.

C++

system("/usr/sbin/reboot");

Depending on your use case, maybe /usr/sbin/shutdown might be a better option. The shutdown command has additional arguments to allow a grace period before the system goes down so

shutdown -r +5

tells the system to reboot (-r flag) in 5 minutes, and sends a warning to all users about the impending reboot.

Posted 19-Jun-21 2:51am

k5054

Comments

Member 15253975 19-Jun-21 9:27am

Thanks, but i need to go to that path given in the script file then it will reboot...

k5054 19-Jun-21 14:10pm

Your script does not "go" anywhere. Maybe you mean you need to do the equivalent of

echo `echo system > /sys/firmware/zynqmp/shutdown_scope`

. If so, there a 2 options. Either use the system() call, or open,write,close the file programatically e.g.

// use system
system("echo system > /sys/firmware/zynqmp/shutdown_scope");

// open, write, close FILE
FILE *scope = fopen("/sys/firmware/zynqmp/shutdown_scope", "w");
fprintf(scope, "system\n");
fclose(scope);

Note that I have not done any error checking, so that should probably be something you should consider. If the system() call might produce an error or other feedback, take a look a pope().

Member 15253975 20-Jun-21 9:07am

Thank you very much....