#include <glob.h>

static int

get_pppd_pid(char *device) {

    int i;

    glob_t globbuf;

    int ge = glob("/proc/*/cmdline", 0, NULL, &globbuf);

    if (!ge) {

	for (i = 0; i < globbuf.gl_pathc; ++i) {	    

	    FILE *fcmdline;

	    char cmdline[1024]; // hope this will be enough

	    if (fcmdline = fopen(globbuf.gl_pathv[i], "r")) {

		int num_read;

		num_read = fread(cmdline, 1, 1024, fcmdline);

		if (num_read > 0 && !strcmp(cmdline, "/usr/sbin/pppd")) {

		    int prev_linkname = 0;

		    char *p = cmdline;

		    while (*p && p - cmdline < 1024) {

			if (prev_linkname && !strcmp(p, device)) {

			    int retval;

			    globbuf.gl_pathv[i][strlen(globbuf.gl_pathv[i])-8] = 0;

			    retval = atoi(globbuf.gl_pathv[i]+6);

			    globfree(&globbuf);

			    fclose(fcmdline);

			    return retval;

			}

			prev_linkname = !strcmp(p, "linkname");

			p += strlen(p) + 1;

		    }		    

		}

		fclose(fcmdline);

	    }

	}

	globfree(&globbuf);

	return 0;

    }

    else

	return -1;

}

	    if (!pppdPid && get_pppd_pid(device))

	    {

		// We suspect that pppd is running, but haven't created

		// .pid file yet. So we'll wait for 10 seconds, checking

		// for .pid file every 10 milliseconds.

		int i;

		for (i = 0; i < 1000 && !pppdPid && get_pppd_pid(device) !=0 ; ++i)

		{

		    usleep(10000);

		    physicalDevice = pppLogicalToPhysical(&pppdPid, real_device);

		    if (physicalDevice) { free(physicalDevice); physicalDevice = NULL; }

		}

		sleep(2); // Else pppd may hangup, seems there's a bug in it

	    }