OS-3280 need a way to specify the root of a native system in the lx brand
OS-3279 lx brand should allow delegated datasets
Reviewed by: Jerry Jelinek <jerry.jelinek@joyent.com>

          --- old/usr/src/cmd/ptools/pwdx/pwdx.c
          +++ new/usr/src/cmd/ptools/pwdx/pwdx.c

   1    1  /*
   2    2   * CDDL HEADER START
   3    3   *
   4    4   * The contents of this file are subject to the terms of the
   5    5   * Common Development and Distribution License, Version 1.0 only
   6    6   * (the "License").  You may not use this file except in compliance
   7    7   * with the License.
   8    8   *
   9    9   * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
  10   10   * or http://www.opensolaris.org/os/licensing.
  11   11   * See the License for the specific language governing permissions
  12   12   * and limitations under the License.
  13   13   *
  14   14   * When distributing Covered Code, include this CDDL HEADER in each

  15   15   * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  16   16   * If applicable, add the following below this CDDL HEADER, with the
  17   17   * fields enclosed by brackets "[]" replaced with your own identifying
  18   18   * information: Portions Copyright [yyyy] [name of copyright owner]
  19   19   *
  20   20   * CDDL HEADER END
  21   21   */
  22   22  /*
  23   23   * Copyright 2004 Sun Microsystems, Inc.  All rights reserved.
  24   24   * Use is subject to license terms.
       25 + * Copyright (c) 2014, Joyent, Inc.  All rights reserved.
  25   26   */
  26   27  
  27      -#pragma ident   "%Z%%M% %I%     %E% SMI"
  28      -
  29   28  #include <stdio.h>
  30   29  #include <unistd.h>
  31   30  #include <string.h>
  32   31  #include <errno.h>
  33   32  #include <libproc.h>
  34   33  #include <sys/param.h>
  35   34  
       35 +#include "ptools_common.h"
       36 +
  36   37  static char *command;
  37   38  
  38   39  static int
  39   40  show_cwd(const char *arg)
  40   41  {
  41   42          char cwd[MAXPATHLEN], proc[128];
  42   43          psinfo_t p;
  43   44          int gcode;
  44   45          int ret;
  45   46  
  46   47          if (proc_arg_psinfo(arg, PR_ARG_PIDS, &p, &gcode) == -1) {
  47   48                  (void) fprintf(stderr, "%s: cannot examine %s: %s\n",
  48   49                      command, arg, Pgrab_error(gcode));
  49   50                  return (1);
  50   51          }
  51   52  
  52      -        (void) snprintf(proc, sizeof (proc), "/proc/%d/path/cwd",
       53 +        (void) proc_snprintf(proc, sizeof (proc), "/proc/%d/path/cwd",
  53   54              (int)p.pr_pid);
  54   55  
  55   56          if ((ret = readlink(proc, cwd, sizeof (cwd) - 1)) <= 0) {
  56   57                  (void) fprintf(stderr, "%s: cannot resolve cwd for %s: %s\n",
  57   58                      command, arg, strerror(errno));
  58   59                  return (1);
  59   60          }
  60   61  
  61   62          cwd[ret] = '\0';
  62   63  

  63   64          (void) printf("%d:\t%s\n", (int)p.pr_pid, cwd);
  64   65          return (0);
  65   66  }
  66   67  
  67   68  int
  68   69  main(int argc, char **argv)
  69   70  {
  70   71          int retc = 0;
  71   72  
  72   73          if ((command = strrchr(argv[0], '/')) != NULL)
  73   74                  command++;
  74   75          else
  75   76                  command = argv[0];
  76   77  
  77   78          if (argc <= 1) {
  78   79                  (void) fprintf(stderr, "usage:\t%s pid ...\n", command);
  79   80                  (void) fprintf(stderr, "  (show process working directory)\n");
  80   81          }
  81   82  
  82   83          while (--argc >= 1)
  83   84                  retc += show_cwd(*++argv);
  84   85  
  85   86          return (retc);
  86   87  }

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