/*
* $NetBSD: ls.c,v 1.4 2014/03/25 18:35:32 christos 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. All advertising materials mentioning features or use of this software
*    must display the following acknowledgement:
*      This product includes software developed by the University of
*      California, Berkeley and its contributors.
* 4. 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.
*/

#include <sys/cdefs.h>
/* __FBSDID("$FreeBSD: src/sys/boot/common/ls.c,v 1.11 2003/08/25 23:30:41 obrien Exp $"); */


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

#include <lib/libsa/stand.h>
#include <lib/libsa/loadfile.h>

#include "bootstrap.h"

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

static int      ls_getdir(char **pathp);

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) {
               size_t buflen;
               /* stat the file, if possible */
               sb.st_size = 0;
               buflen = strlen(path) + strlen(d->d_name) + 2;
               buf = alloc(buflen);
               snprintf(buf, buflen, "%s/%s", path, d->d_name);
               /* ignore return, could be symlink, etc. */
               if (stat(buf, &sb))
                   sb.st_size = 0;
               free(buf);
               snprintf(lbuf, sizeof(lbuf), " %c %8d %s\n", typestr[d->d_type],
                   (int)sb.st_size, d->d_name);
           } else {
             snprintf(lbuf, sizeof(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, *tail;

   tail = NULL;
   fd = -1;

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

   /* Make sure the path is respectable to begin with */
   if (archsw.arch_getdev(NULL, path, &cp)) {
       command_seterr("bad path '%s'", path);
       goto out;
   }

   /* If there's no path on the device, assume '/' */
   if (*cp == 0)
       strcat(path, "/");
   fd = open(path, O_RDONLY);
   if (fd < 0) {
       command_seterr("open '%s' failed: %s", path, strerror(errno));
       goto out;
   }
   if (fstat(fd, &sb) < 0) {
       command_seterr("stat failed: %s", strerror(errno));
       goto out;
   }
   if (!S_ISDIR(sb.st_mode)) {
       command_seterr("%s: %s", path, strerror(ENOTDIR));
       goto out;
   }

   *pathp = path;
   return(fd);

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