2.9BSD - /usr/src/cmd/learn/start.c

   1: #include "stdio.h"
   2: #include "lrnref"
   3: #define ND  64
   4: 
   5: start(lesson)
   6: char *lesson;
   7: {
   8:     struct direct {
   9:         int inode;
  10:         char name[14];
  11:     };
  12:     struct direct dv[ND], *dm, *dp;
  13:     int f, c, n;
  14:     char where [100];
  15: 
  16:     f = open(".", 0);
  17:     n = read(f, dv, ND*sizeof(*dp));
  18:     n /= sizeof(*dp);
  19:     if (n==ND)
  20:         fprintf(stderr, "lesson too long\n");
  21:     dm = dv+n;
  22:     for(dp=dv; dp<dm; dp++)
  23:         if (dp->inode) {
  24:             n = strlen(dp->name);
  25:             if (dp->name[n-2] == '.' && dp->name[n-1] == 'c')
  26:                 continue;
  27:             c = dp->name[0];
  28:             if (c>='a' && c<= 'z')
  29:                 unlink(dp->name);
  30:         }
  31:     close(f);
  32:     if (ask)
  33:         return;
  34:     sprintf(where, "../../%s/L%s", sname, lesson);
  35:     if (access(where, 04)==0)   /* there is a file */
  36:         return;
  37:     fprintf(stderr, "No lesson %s\n",lesson);
  38:     wrapup(1);
  39: }
  40: 
  41: fcopy(new,old)
  42: char *new, *old;
  43: {
  44:     char b[512];
  45:     int n, fn, fo;
  46:     fn = creat(new, 0666);
  47:     fo = open(old,0);
  48:     if (fo<0) return;
  49:     if (fn<0) return;
  50:     while ( (n=read(fo, b, 512)) > 0)
  51:         write(fn, b, n);
  52:     close(fn);
  53:     close(fo);
  54: }

Defined functions

Defined struct's

Defined macros