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Annotation of 42BSD/usr.bin/learn/start.c, revision 1.1.1.1

1.1       root        1: #ifndef lint
                      2: static char sccsid[] = "@(#)start.c    4.2     (Berkeley)      4/25/83";
                      3: #endif not lint
                      4: 
                      5: #include "stdio.h"
                      6: #include "lrnref.h"
                      7: #include <sys/types.h>
                      8: #include <sys/dir.h>
                      9: #define        ND      64
                     10: 
                     11: start(lesson)
                     12: char *lesson;
                     13: {
                     14:        struct direct dv[ND], *dm, *dp;
                     15:        int f, c, n;
                     16:        char where [100];
                     17: 
                     18:        f = open(".", 0);               /* clean up play directory */
                     19:        n = read(f, dv, ND*sizeof(*dp));
                     20:        n /= sizeof(*dp);
                     21:        if (n==ND)
                     22:                fprintf(stderr, "Start:  play directory too long\n");
                     23:        dm = dv+n;
                     24:        for(dp=dv; dp<dm; dp++)
                     25:                if (dp->d_ino) {
                     26:                        n = strlen(dp->d_name);
                     27:                        if (dp->d_name[n-2] == '.' && dp->d_name[n-1] == 'c')
                     28:                                continue;
                     29:                        c = dp->d_name[0];
                     30:                        if (c>='a' && c<= 'z')
                     31:                                unlink(dp->d_name);
                     32:                }
                     33:        close(f);
                     34:        if (ask)
                     35:                return;
                     36:        sprintf(where, "%s/%s/L%s", direct, sname, lesson);
                     37:        if (access(where, 04)==0)       /* there is a file */
                     38:                return;
                     39:        perror(where);
                     40:        fprintf(stderr, "Start:  no lesson %s\n",lesson);
                     41:        wrapup(1);
                     42: }
                     43: 
                     44: fcopy(new,old)
                     45: char *new, *old;
                     46: {
                     47:        char b[BUFSIZ];
                     48:        int n, fn, fo;
                     49:        fn = creat(new, 0666);
                     50:        fo = open(old,0);
                     51:        if (fo<0) return;
                     52:        if (fn<0) return;
                     53:        while ( (n=read(fo, b, BUFSIZ)) > 0)
                     54:                write(fn, b, n);
                     55:        close(fn);
                     56:        close(fo);
                     57: }

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