Merge "lsof: Add support for printing open files for a single process"

int lsof_main(int argc, char *argv[])

{

    long int pid = 0;

    char* endptr;

    if (argc == 2) {

        pid = strtol(argv[1], &endptr, 10);

    }

    print_header();

    if (pid) {

        lsof_dumpinfo(pid);

    } else {

        DIR *dir = opendir("/proc");

        if (dir == NULL) {

            fprintf(stderr, "Couldn't open /proc\n");

            return -1;

        }

    print_header();

        struct dirent* de;

        while ((de = readdir(dir))) {

            if (!strcmp(de->d_name, ".") || !strcmp(de->d_name, ".."))

                continue;

            // Only inspect directories that are PID numbers

        char* endptr;

        long int pid = strtol(de->d_name, &endptr, 10);

                pid = strtol(de->d_name, &endptr, 10);

            if (*endptr != '\0')

                continue;

            lsof_dumpinfo(pid);

        }

        closedir(dir);

    }

    return 0;

}