Invorking a script in c++ code

[seforo]

Can any one tell me how I can invorke/call a shell script in a c++ code so that I can I can invorke some shell commands using my c++ code. I am using scientific linux

[horace1]

Can any one tell me how I can invorke/call a shell script in a c++ code so that I can I can invorke some shell commands using my c++ code. I am using scientific linux

you should be able to use the function system() in process.h, e.g. to run a file called script

    system("sh script");      // invoke a script
 

your parent process is suspended until the script is finished then it is resumed

[seforo]

Thanks, this is what I was looking for

[horace1]

Thanks, this is what I was looking for

you don't even need to use a script you can run shell programs directly

    system("ls -l");      // invoke ls
 

if you want the parent to run concurrently with the child process you can use

    int pid=spawnlp(P_NOWAIT,"ls","ls","-l",NULL);
 

see http://www.python.org/doc/2.3/lib/os-process.html

[mandeepahuja]

you don't even need to use a script you can run shell programs directly

    system("ls -l");      // invoke ls
 

if you want the parent to run concurrently with the child process you can use

    int pid=spawnlp(P_NOWAIT,"ls","ls","-l",NULL);
 

see http://www.python.org/doc/2.3/lib/os-process.html

I have a question on this,
I am able to run the shell script (getVar.sh) using the system command but I want the string returned by the shell script in my c++ code. I tried using popen but it crashes frequently. Is there anything else I can use?. Please help !!
regards

[horace1]

I have a question on this,
I am able to run the shell script (getVar.sh) using the system command but I want the string returned by the shell script in my c++ code. I tried using popen but it crashes frequently. Is there anything else I can use?. Please help !!
regards

you could write the output of the script to a file and then open and read that file, e.g.

system("ls -l > x");      // invoke ls
 

the file listing will be in the file x