How to capture process output in C?

Is there any analog of PHP's system in C?

man system says, that system return status of the command, but I need the output (like in PHP).

Of course, I can use pipes for this, but is there any standard way?


You can make use of popen and related function as:

// command to be run.
char *cmd = "date"; 

// open pipe stream.
FILE *fp = popen(cmd,"r");
int ch; 

// error checking.
if(!fp) {
        fprintf(stderr,"Error popen with %s\n",cmd);

// read from the process and print.
while((ch = fgetc(fp)) != EOF) {

// close the stream.

Ideone link

If you need the output of the command, you'd use popen() on Unix (with "r" to indicate that you want to read from the command).

FILE *fp = popen("some -convoluted command", "r");
...check for validity... data from command...

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