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>

*** 21,32 ****
  /*
   * Copyright 2006 Sun Microsystems, Inc.  All rights reserved.
   * Use is subject to license terms.
   */
  
- #pragma ident   "%Z%%M% %I%     %E% SMI"
- 
  #include <stdio.h>
  #include <stdio_ext.h>
  #include <ctype.h>
  #include <stdlib.h>
  #include <unistd.h>
--- 21,30 ----
*** 37,46 ****
--- 35,46 ----
  #include <sys/types.h>
  #include <stropts.h>
  #include <poll.h>
  #include <procfs.h>
  #include <sys/resource.h>
+ #include <limits.h>
+ #include "ptools_common.h"
  
  static int count_my_files();
  static char *command;
  
  /* slop to account for extra file descriptors opened by libraries we call */
*** 47,56 ****
--- 47,57 ----
  #define SLOP    5
  
  int
  main(int argc, char **argv)
  {
+         char buf[PATH_MAX];
          unsigned long remain = 0;
          struct pollfd *pollfd;
          struct pollfd *pfd;
          struct rlimit rlim;
          char *arg;
*** 77,86 ****
--- 78,89 ----
                  (void) fprintf(stderr,
                      "  -v: verbose; report terminations to standard out\n");
                  return (2);
          }
  
+         (void) proc_snprintf(buf, sizeof (buf), "/proc/");
+ 
          /* make sure we have enough file descriptors */
          if (getrlimit(RLIMIT_NOFILE, &rlim) == 0) {
                  int nfiles = count_my_files();
  
                  if (rlim.rlim_cur < argc + nfiles + SLOP) {
*** 106,116 ****
  
                  arg = argv[i];
                  if (strchr(arg, '/') != NULL)
                          (void) strncpy(psinfofile, arg, sizeof (psinfofile));
                  else {
!                         (void) strcpy(psinfofile, "/proc/");
                          (void) strncat(psinfofile, arg, sizeof (psinfofile)-6);
                  }
                  (void) strncat(psinfofile, "/psinfo",
                          sizeof (psinfofile)-strlen(psinfofile));
  
--- 109,119 ----
  
                  arg = argv[i];
                  if (strchr(arg, '/') != NULL)
                          (void) strncpy(psinfofile, arg, sizeof (psinfofile));
                  else {
!                         (void) strcpy(psinfofile, buf);
                          (void) strncat(psinfofile, arg, sizeof (psinfofile)-6);
                  }
                  (void) strncat(psinfofile, "/psinfo",
                      sizeof (psinfofile)-strlen(psinfofile));
  
*** 158,169 ****
                                          psinfo_t psinfo;
  
                                          if (pread(pfd->fd, &psinfo,
                                              sizeof (psinfo), (off_t)0)
                                              == sizeof (psinfo)) {
!                                                 (void) printf(
!                                         "%s: terminated, wait status 0x%.4x\n",
                                                          arg, psinfo.pr_wstat);
                                          } else {
                                                  (void) printf(
                                                      "%s: terminated\n", arg);
                                          }
--- 161,172 ----
                                          psinfo_t psinfo;
  
                                          if (pread(pfd->fd, &psinfo,
                                              sizeof (psinfo), (off_t)0)
                                              == sizeof (psinfo)) {
!                                                 (void) printf("%s: terminated, "
!                                                     "wait status 0x%.4x\n",
                                                      arg, psinfo.pr_wstat);
                                          } else {
                                                  (void) printf(
                                                      "%s: terminated\n", arg);
                                          }