// $Id: popen1.c,v 1.1 2004-12-16 08:48:48+09 kaiya Exp kaiya $

#include <stdio.h>

main(int argc, char* argv[]){
FILE* fp;
FILE* ofp;
char buf[100];
	if((fp=popen("/bin/ps -ef", "r"))==NULL) exit(1);
	if((ofp=popen("/bin/cat -n", "w"))==NULL) exit(2);
	while(fgets(buf, 100, fp)!=NULL){
	int pid;
	char name[100];
		if(sscanf(buf, "%s %d", name, &pid)==2){
			fprintf(ofp, "%d %s\n", pid, name);
		}
	}
	fclose(ofp);
}