#include <u.h>
#include <base.h>

static char buf[4*1024], *c = buf; /* should be greater or equal to PATH_MAX */

static
void
flush(void)
{
    *c = 0;
    puts(buf);
    c  = buf;
}

static
int
print(void *data, char *rel, char *abs, io·Stat *info)
{
copy:
    while (*abs && c < (arrend(buf)-2))
        *c++ = *abs++;

    if (*abs) {
        flush();
        goto copy;
    }
    *c++ = '\n';

    return 0;
}

static
void
usage(void)
{
    fprintf(stderr, "usage: walk [-dlpv] file ...\n");
    exit(1);
}

int
main(int argc, char *argv[])
{
    int i, f = fs·nolinks, err, max = 0;
    char *p;
    static fs·Walker walker;

    ARGBEGIN{
    case 'd':
        max = atoi(ARGF());
        break;
    case 'l':
        f ^= fs·nolinks;
        break;
    case 'p':
        f |= fs·preorder;
        break;
    case 'v':
        f |= fs·verbose;
        break;
    default:
        usage();
    }ARGEND;

    walker.flags = f;
    walker.func  = print;
    walker.data  = nil;
    walker.max   = max;

    if (argc == 0) {
        fs·init(&walker, "");
        fs·walk(&walker);
        return(err = walker.err);
    } else {
        err = 0;
        for (i=0; i<argc; i++) {
            fs·init(&walker, argv[i]); 
            fs·walk(&walker);
            err += walker.err;
        }
    }
    fs·fini(&walker);
    flush();
    exit(err);
}