/*
 * $NetBSD: ls.c,v 1.3 1997/06/13 13:48:47 drochner Exp $
 */

/*-
 * Copyright (c) 1993
 *      The Regents of the University of California.  All rights reserved.
 * Copyright (c) 1996
 *      Matthias Drochner.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 * $FreeBSD: src/sys/boot/common/ls.c,v 1.11 2003/08/25 23:30:41 obrien Exp $
 */

#include <sys/param.h>
#include <vfs/ufs/dinode.h>
#include <vfs/ufs/dir.h>

#include <stand.h>
#include <string.h>

#include "bootstrap.h"

static char typestr[] = "?fc?d?b? ?l?s?w";

static int      ls_getdir(char **pathp);

COMMAND_SET(ls, "ls", "list files", command_ls);

static int
command_ls(int argc, char *argv[])
{
    int         fd;
    struct stat sb;
    struct      dirent *d;
    char        *buf, *path;
    char        lbuf[128];              /* one line */
    int         result, ch;
    int         verbose;
        
    result = CMD_OK;
    fd = -1;
    verbose = 0;
    optind = 1;
    optreset = 1;
    while ((ch = getopt(argc, argv, "l")) != -1) {
        switch(ch) {
        case 'l':
            verbose = 1;
            break;
        case '?':
        default:
            /* getopt has already reported an error */
            return(CMD_OK);
        }
    }
    argv += (optind - 1);
    argc -= (optind - 1);

    if (argc < 2) {
        path = "";
    } else {
        path = argv[1];
    }

    fd = ls_getdir(&path);
    if (fd == -1) {
        result = CMD_ERROR;
        goto out;
    }
    pager_open();
    pager_output(path);
    pager_output("\n");

    while ((d = readdirfd(fd)) != NULL) {
        if (strcmp(d->d_name, ".") && strcmp(d->d_name, "..")) {
            if (verbose) {
                /* stat the file, if possible */
                sb.st_size = 0;
                buf = malloc(strlen(path) + strlen(d->d_name) + 2);
                if (strlen(path) == 0)
                    sprintf(buf, "%s", d->d_name);
                else
                    sprintf(buf, "%s/%s", path, d->d_name);
                /* ignore return, could be symlink, etc. */
                if (rel_stat(buf, &sb))
                    sb.st_size = 0;
                free(buf);
                sprintf(lbuf, " %c %8d %s\n", typestr[d->d_type],
                    (int)sb.st_size, d->d_name);
            } else {
                sprintf(lbuf, " %c  %s\n", typestr[d->d_type], d->d_name);
            }
            if (pager_output(lbuf))
                goto out;
        }
    }
 out:
    pager_close();
    if (fd != -1)
        close(fd);
    if (path != NULL)
        free(path);
    return(result);
}

/*
 * Given (path) containing a vaguely reasonable path specification, return an fd
 * on the directory, and an allocated copy of the path to the directory.
 */
static int
ls_getdir(char **pathp)
{
    struct stat sb;
    int         fd;
    const char  *cp;
    char        *path;

    fd = -1;

    /* one extra byte for a possible trailing slash required */
    path = malloc(strlen(*pathp) + 2);
    strcpy(path, *pathp);

    /* Make sure the path is respectable to begin with */
    if (archsw.arch_getdev(NULL, path, &cp)) {
        snprintf(command_errbuf, sizeof(command_errbuf),
            "bad path '%s'", path);
        goto out;
    }
    
    fd = rel_open(cp, NULL, O_RDONLY);
    if (fd < 0) {
        snprintf(command_errbuf, sizeof(command_errbuf),
            "open '%s' failed: %s", path, strerror(errno));
        goto out;
    }
    if (fstat(fd, &sb) < 0) {
        snprintf(command_errbuf, sizeof(command_errbuf),
            "stat failed: %s", strerror(errno));
        goto out;
    }
    if (!S_ISDIR(sb.st_mode)) {
        snprintf(command_errbuf, sizeof(command_errbuf),
            "%s: %s", path, strerror(ENOTDIR));
        goto out;
    }

    *pathp = path;
    return(fd);

 out:
    free(path);
    *pathp = NULL;
    if (fd != -1)
        close(fd);
    return(-1);
}