Cannot execute binary file with bash command

Question

I want to run a cpp executable from my git for windows bash. I do not understand why I can run it with ./Main but I can't run it with bash Main or bash Main.exe. In the latter cases, I'm getting an error:

cannot execute binary file

main.cpp

#include<iostream>

int main()
{
std::cout<<"Hello World";
return 0;
}

script.sh

 echo "Hello from Bash script.."
    echo "Hostname:${1}"
    echo "Port:${2}"
    echo "Listing contents:"
    ls -a
    echo "Launching cpp executable:"
    path=$(pwd)
    echo "Current path:${path}"
    bash "${path}/Main"

To compile the C++ code, I'm using: g++ -o Main main.cpp.

What is the problem? Can someone explain please?

I'm not sure there's much more to say than what bash already told you : it can't execute binary files. — Aaron
– Aaron, Commented Sep 21, 2018 at 14:03
of course. When you say bash filename you're telling bash to execute the shell commands found in the file: it is expected to be a text file containing a shell script. — glenn jackman
– glenn jackman, Commented Sep 21, 2018 at 14:09
you might want bash -c executableFile which spawns a bash shell to run the specified command, but you still need to provide the path to it, just like ./executableFile — glenn jackman
– glenn jackman, Commented Sep 21, 2018 at 14:11
For more details: gnu.org/software/bash/manual/bash.html#Invoking-Bash -- "If arguments remain after option processing, and neither the -c nor the -s option has been supplied, the first argument is assumed to be the name of a file containing shell commands" — glenn jackman
– glenn jackman, Commented Sep 21, 2018 at 14:12

jbaptperez · Accepted Answer · 2018-09-21 14:12:56Z

3

Just remove the bash on the last line of your script:

"${path}/Main"

Don't forget to make it executable.

chmod +x script.sh

It worked for me:

./script.sh hostname 80
Hello from Bash script..
Hostname:hostname
Port:80
Listing contents:
.       ..      Main        main.cpp    script.sh
Launching cpp executable:
Current path:/tmp/test
Hello World

answered Sep 21, 2018 at 14:12

jbaptperez

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