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

#ifndef lint
static char sccsid[] = "@(#)start.c     4.2     (Berkeley)      %G%";
#endif not lint

#include "stdio.h"
#include "lrnref.h"
#include <sys/types.h>
#include <sys/dir.h>
#define ND      64

start(lesson)
char *lesson;
{
       struct direct dv[ND], *dm, *dp;
       int f, c, n;
       char where [100];

       f = open(".", 0);               /* clean up play directory */
       n = read(f, dv, ND*sizeof(*dp));
       n /= sizeof(*dp);
       if (n==ND)
               fprintf(stderr, "Start:  play directory too long\n");
       dm = dv+n;
       for(dp=dv; dp<dm; dp++)
               if (dp->d_ino) {
                       n = strlen(dp->d_name);
                       if (dp->d_name[n-2] == '.' && dp->d_name[n-1] == 'c')
                               continue;
                       c = dp->d_name[0];
                       if (c>='a' && c<= 'z')
                               unlink(dp->d_name);
               }
       close(f);
       if (ask)
               return;
       sprintf(where, "%s/%s/L%s", direct, sname, lesson);
       if (access(where, 04)==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);
}