execute script with C++ [duplicate]

问题

This question already has answers here:

How do I execute a command and get the output of the command within C++ using POSIX? (9 answers)

How to assign shell command output to a variable in C language (4 answers)

Closed 6 years ago.

I want to execute a script through a c++ program and get its output. Presently I am doing

system("./script.sh > out.txt");

But I need a command that get the output to a string, some thing like:

out = system("./script.sh");
printf(out);

I can't read the file out.txt after execute the script because I don't have permission to that. I deployed my c++ program at other framework (boinc) that doesn't give me this permission.

Does anybody have a hint? Thanks in advance! Felipe

回答1:

you can use popen() and then get the output of the command from the pipe opened by popen()

FILE  *fp;
fp=popen("./script.sh","r");

and to get your output. you can use fgets() or fread() to read from pipe like you read from a file

来源：https://stackoverflow.com/questions/16235370/execute-script-with-c