usr/src/usr.bin/learn/learn/start.c

#ifndef lint
static char sccsid[] = "@(#)start.c     4.6     (Berkeley)      %G%";
#endif not lint

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

start(lesson)
char *lesson;
{
        struct dirent dbuf;
        register struct dirent *ep = &dbuf;     /* directory entry pointer */
        int c, n;
        char where [100];
        DIR *dp;

#define OPENDIR(s)      ((dp = opendir(s)) != NULL)
#define DIRLOOP(s)      for (s = readdir(dp); s != NULL; s = readdir(dp))
#define EPSTRLEN        ep->d_namlen
#define CLOSEDIR        closedir(dp)

        if (!OPENDIR(".")) {            /* clean up play directory */
                perror("Start:  play directory");
                wrapup(1);
        }
        DIRLOOP(ep) {
                if (ep->d_ino == 0)
                        continue;
                n = EPSTRLEN;
                if (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);
        }
        CLOSEDIR;
        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);
}