new copyright; att/bsd/shared

[unix-history] / usr / src / usr.bin / learn / learn / start.c

/*-
* Copyright (c) 1986 The Regents of the University of California.
* All rights reserved.
*
* %sccs.include.proprietary.c%
*/

#ifndef lint
static char sccsid[] = "@(#)start.c     4.8 (Berkeley) %G%";
#endif /* not lint */

#include "stdio.h"
#include "lrnref.h"
#include <sys/types.h>
#include <dirent.h>
#include <unistd.h>

start(lesson)
char *lesson;
{
       register struct dirent *ep;
       int c, n;
       char where [100];
       DIR *dp;

       if ((dp = opendir(".")) == NULL) {      /* clean up play directory */
               perror("Start:  play directory");
               wrapup(1);
       }
       while ((ep = readdir(dp)) != NULL) {
               if (ep->d_ino == 0)
                       continue;
               n = ep->d_namlen;
               if (n >= 2 && ep->d_name[n-2] == '.' && ep->d_name[n-1] == 'c')
                       continue;
               c = ep->d_name[0];
               if (c>='a' && c<= 'z')
                       unlink(ep->d_name);
       }
       (void) closedir(dp);
       if (ask)
               return;
       sprintf(where, "%s/%s/L%s", direct, sname, lesson);
       if (access(where, R_OK)==0)     /* there is a file */
               return;
       perror(where);
       fprintf(stderr, "Start:  no lesson %s\n",lesson);
       wrapup(1);
}

fcopy(new,old)
char *new, *old;
{
       char b[BUFSIZ];
       int n, fn, fo;
       fn = creat(new, 0666);
       fo = open(old,0);
       if (fo<0) return;
       if (fn<0) return;
       while ( (n=read(fo, b, BUFSIZ)) > 0)
               write(fn, b, n);
       close(fn);
       close(fo);
}