How to redirect output from reading a bash script in c++?

Question

I know that the function:

system("myfile.sh")

exec a bash script. Ok but now I want to redirect the output to my program to ensure the reading. For example the script date.sh give me the date of my system, and i want to see it on my program with std::cout << OUTPUTDATE; Is it possible? How?

Duplicate of: Best way to capture stdout from a system() command so it can be passed to another function — Darcara
– Darcara, Commented Oct 9, 2011 at 10:18

cnicutar · Accepted Answer · 2011-10-09 10:16:21Z

6

Use popen instead of system.

The function popen will give you a FILE * you can read from.

FILE *script = popen("myfile.sh", "r");
while (fgets(line, LENGTH, script)) {
    /* ... */
}
pclose(script);

answered Oct 9, 2011 at 10:16

cnicutar

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2 Comments

user840718 Over a year ago

With this method, can I send easly and without error the output to a client on my network? Thx

cnicutar Over a year ago

@user840718 With this method you can capture the output of "myfile.sh". I don't know about the clients on your network :-)

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