scandir

#include<stdio.h>
#include <stdlib.h>
#include <string.h>
#include <signal.h>
#include<dirent.h>
char isNum(const char* name)
{
  int i=strlen(name)-1;
  do{ if (!isdigit(name[i])) return 0; } while(i--);

   return 1;
}

main(){
FILE* f;
char buf[60];
       char* p=buf;
       int pid,n,i,c;
       char **names, **ptr;
char way[60]="/proc";
struct dirent **namelist, **d_ptr;
n = scandir(way, &namelist, 0, alphasort);
if (n < 0){
perror("scandir");
          }
else {
d_ptr=namelist;
names=(char**)malloc(n*sizeof(char*));
ptr=names;
for(i=0;i<n;i++){
ptr++=strdup(*(d_ptr++>d_name));
                }
for(i=0;i<n;i++){
printf("f[%d]=%s\n", i, names[i]);
                }
                }
free(namelist);
}
}