mkdir.c

This is to bulid a sample linux shell.

#include<stdio.h>
#include<sys/types.h>
#include<unistd.h>
#include<string.h>
#include<sys/stat.h>
#include<stdlib.h>
#if defined (BSD) && !_POSIX_SOURCE
 #include<sys/dir.h>
 typedef struct direct Dirent;
#else
 #include<dirent.h>
 typedef struct dirent Dirent;
#endif
main(int argc ,char *argv[])
 {
  Dirent *dp;
  DIR *dir_fdesc;
  int i,cnt;
  if(argc==1)  //check for the file name
  {  printf("USAGE: mkdir <filename>\n");
     exit(0);
   }

 for(i=0;i<argc;i++)  //open all the directory in given filenames
  { if(!(dir_fdesc=opendir(argv[i])))
   {
     if(mkdir(argv[i],S_IRWXU|S_IRWXG|S_IRWXO)==-1);//this be the default directory modes
     printf("Perror-opendir\n");
   } 
  }
}