A short code example of using popen in c to start a process then write to it using fprintf.

#include <stdio.h>

int main(int argc, char **argv) {
    FILE *fp = popen("cat", "w");
    int i = 0;

    for(i=0;i<10;i++) {
        fprintf(fp, "Count = %d\n", i);
    }

    pclose(fp);

    return 0;
}




Last Modified: 23 February 2017

Releated Posts


2017-04-25 - Linux Programming - Signals the easy way
2017-03-01 - Shooting yourself in the head with threads
2013-02-16 - C - Some simple examples of using strcat
2012-11-03 - C - How to override malloc / free
2012-09-22 - Linux Programming - Using inotify for detecting file modifications
2012-08-09 - C++ - Check an IP Address is in a IP Mask
2012-06-16 - CPP - Using gperf
2012-04-05 - Using gdb to debug a core file
2012-03-15 - C - Is the stdin a tty
2012-03-13 - C - Converting from char / string to int using atoi
2012-03-08 - C - UDP Socket example
2012-02-20 - C - Get home dir location in linux
2012-02-17 - C - IP address validation
2012-02-15 - C - Get current ip address of an interface
2012-02-10 - Using asprintf instead of sprintf or snprintf
2012-01-31 - C - Example of how to overwrite argv
2012-01-30 - C - The string reverse
2012-01-27 - C - Palindrome
2012-01-26 - C - Example of using popen
2011-12-28 - C - gethostbyname example
2011-12-11 - C - Linux get mac address from interface