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>

*** 19,36 ****
   * CDDL HEADER END
   */
  /*
   * Copyright 2007 Sun Microsystems, Inc.  All rights reserved.
   * Use is subject to license terms.
   */
  
  /*
   * ptree -- print family tree of processes
   */
  
- #pragma ident   "%Z%%M% %I%     %E% SMI"
- 
  #include <assert.h>
  #include <stdio.h>
  #include <string.h>
  #include <errno.h>
  #include <fcntl.h>
--- 19,35 ----
   * CDDL HEADER END
   */
  /*
   * Copyright 2007 Sun Microsystems, Inc.  All rights reserved.
   * Use is subject to license terms.
+  * Copyright (c) 2014, Joyent, Inc.  All rights reserved.
   */
  
  /*
   * ptree -- print family tree of processes
   */
  
  #include <assert.h>
  #include <stdio.h>
  #include <string.h>
  #include <errno.h>
  #include <fcntl.h>
*** 46,55 ****
--- 45,55 ----
  #include <libcontract.h>
  #include <sys/contract.h>
  #include <sys/ctfs.h>
  #include <libcontract_priv.h>
  #include <sys/stat.h>
+ #include "ptools_common.h"
  
  #define FAKEDPID0(p)    (p->pid == 0 && p->psargs[0] == '\0')
  
  typedef struct ps {
          int     done;
*** 101,114 ****
          int errflg = 0;
          struct winsize winsize;
          char *s;
          int n;
          int retc = 0;
  
          DIR *dirp;
          struct dirent *dentp;
!         char    pname[100];
          int     pdlen;
  
          ps_t *p;
  
          if ((command = strrchr(argv[0], '/')) == NULL)
--- 101,115 ----
          int errflg = 0;
          struct winsize winsize;
          char *s;
          int n;
          int retc = 0;
+         char ppath[PATH_MAX];
  
          DIR *dirp;
          struct dirent *dentp;
!         char    pname[PATH_MAX];
          int     pdlen;
  
          ps_t *p;
  
          if ((command = strrchr(argv[0], '/')) == NULL)
*** 167,186 ****
  
          nps = 0;
          psize = 0;
          ps = NULL;
  
          /*
           * Search the /proc directory for all processes.
           */
!         if ((dirp = opendir("/proc")) == NULL) {
!                 (void) fprintf(stderr, "%s: cannot open /proc directory\n",
!                     command);
                  return (1);
          }
  
!         (void) strcpy(pname, "/proc");
          pdlen = strlen(pname);
          pname[pdlen++] = '/';
  
          /* for each active process --- */
          while (dentp = readdir(dirp)) {
--- 168,189 ----
  
          nps = 0;
          psize = 0;
          ps = NULL;
  
+         (void) proc_snprintf(ppath, sizeof (ppath), "/proc");
+ 
          /*
           * Search the /proc directory for all processes.
           */
!         if ((dirp = opendir(ppath)) == NULL) {
!                 (void) fprintf(stderr, "%s: cannot open %s directory\n",
!                     command, ppath);
                  return (1);
          }
  
!         (void) strcpy(pname, ppath);
          pdlen = strlen(pname);
          pname[pdlen++] = '/';
  
          /* for each active process --- */
          while (dentp = readdir(dirp)) {