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/* Machine independent support for SVR4 /proc (process file system) for GDB.

   Copyright 1999 Free Software Foundation, Inc.

   Written by Michael Snyder at Cygnus Solutions.

   Based on work by Fred Fish, Stu Grossman, Geoff Noer, and others.

This file is part of GDB.

This program is free software; you can redistribute it and/or modify

it under the terms of the GNU General Public License as published by

the Free Software Foundation; either version 2 of the License, or

(at your option) any later version.

This program is distributed in the hope that it will be useful,

but WITHOUT ANY WARRANTY; without even the implied warranty of

MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

GNU General Public License for more details.

You should have received a copy of the GNU General Public License

along with this program; if not, write to the Free Software Foundation,

Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */

/*

 * Pretty-print trace of api calls to the /proc api

 * (ioctl or read/write calls).

 *

 */

#include "defs.h"

#include "gdbcmd.h"

#if defined (NEW_PROC_API)

#define _STRUCTURED_PROC 1

#endif

#include <stdio.h>

#include <sys/types.h>

#include <sys/procfs.h>

#include <sys/proc.h>   /* for struct proc */

#ifdef HAVE_SYS_USER_H

#include <sys/user.h>   /* for struct user */

#endif

#include <fcntl.h>      /* for O_RDWR etc. */

#include <sys/wait.h>

#include "proc-utils.h"

/*  Much of the information used in the /proc interface, particularly for

    printing status information, is kept as tables of structures of the

    following form.  These tables can be used to map numeric values to

    their symbolic names and to a string that describes their specific use. */

struct trans {

  long value;                   /* The numeric value */

  char *name;                   /* The equivalent symbolic value */

  char *desc;                   /* Short description of value */

};

static int   procfs_trace    = 1;

/*static int   info_verbose    = 1;*/   /* kludge */

static FILE *procfs_file     = NULL;

static char *procfs_filename = "procfs_trace";

static void

set_procfs_trace_cmd (args, from_tty, c)

     char *args;

     int from_tty;

     struct cmd_list_element *c;

{

#if 0   /* not sure what I might actually need to do here, if anything */

  if (procfs_file)

    fflush (procfs_file);

#endif

}

static void

set_procfs_file_cmd (args, from_tty, c)

     char *args;

     int from_tty;

     struct cmd_list_element *c;

{

  /* Just changed the filename for procfs tracing.

     If a file was already open, close it.  */

  if (procfs_file)

    fclose (procfs_file);

  procfs_file = NULL;

}

#ifndef NEW_PROC_API

static struct trans ioctl_table[] = {

#ifdef PIOCACINFO                       /* irix */

  { PIOCACINFO,    "PIOCACINFO",   "get process account info" },

#endif

  { PIOCACTION,    "PIOCACTION",   "get signal action structs" },

#ifdef PIOCARGUMENTS                    /* osf */

  { PIOCARGUMENTS, "PIOCARGUMENTS", "command line args" },

#endif

#ifdef PIOCAUXV                         /* solaris aux vectors */

  { PIOCAUXV,      "PIOCAUXV",     "get aux vector" },

  { PIOCNAUXV,     "PIOCNAUXV",    "get number of aux vector entries" },

#endif /* AUXV */

  { PIOCCFAULT,    "PIOCCFAULT",   "clear current fault" },

  { PIOCCRED,      "PIOCCRED",     "get process credentials" },

#ifdef PIOCENEVCTRS                     /* irix event counters */

  { PIOCENEVCTRS,    "PIOCENEVCTRS",    "acquire and start event counters" },

  { PIOCGETEVCTRL,   "PIOCGETEVCTRL",   "get control info of event counters" },

  { PIOCGETEVCTRS,   "PIOCGETEVCTRS",   "dump event counters" },

  { PIOCGETPREVCTRS, "PIOCGETPREVCTRS", "dump event counters & prusage info" },

  { PIOCRELEVCTRS,   "PIOCRELEVCTRS",   "release/stop event counters" },

  { PIOCSETEVCTRL,   "PIOCSETEVCTRL",   "set control info of event counters" },

  { PIOCGETPTIMER,   "PIOCGETPTIMER",   "get process timers" },

#endif  /* irix event counters */

  { PIOCGENTRY,    "PIOCGENTRY",   "get traced syscall entry set" },

#if defined (PIOCGETPR)

  { PIOCGETPR,     "PIOCGETPR",    "read struct proc" },

#endif

#if defined (PIOCGETU)

  { PIOCGETU,      "PIOCGETU",     "read user area" },

#endif

#if defined (PIOCGETUTK) && (defined(KERNEL) || defined(SHOW_UTT)) /* osf */

  { PIOCGETUTK,  "PIOCGETUTK", "get the utask struct" },

#endif

  { PIOCGEXIT,     "PIOCGEXIT",    "get traced syscall exit  set" },

  { PIOCGFAULT,    "PIOCGFAULT",   "get traced fault set" },

#ifdef PIOCGFPCR                        /* osf */

  { PIOCGFPCR,     "PIOCGFPCR",    "get FP control register" },

  { PIOCSFPCR,     "PIOCSFPCR",    "set FP conrtol register" },

#endif

  { PIOCGFPREG,    "PIOCGFPREG",   "get floating point registers" },

  { PIOCGHOLD,     "PIOCGHOLD",    "get held signal set" },

  { PIOCGREG,      "PIOCGREG",     "get general registers" },

  { PIOCGROUPS,    "PIOCGROUPS",   "get supplementary groups" },

#ifdef PIOCGSPCACT                      /* osf */

  { PIOCGSPCACT,   "PIOCGSPCACT",  "get special action" },

  { PIOCSSPCACT,   "PIOCSSPCACT",  "set special action" },

#endif

  { PIOCGTRACE,    "PIOCGTRACE",   "get traced signal set" },

#ifdef PIOCGWATCH                       /* irix watchpoints */

  { PIOCGWATCH,    "PIOCGWATCH",   "get watchpoint" },

  { PIOCSWATCH,    "PIOCSWATCH",   "set watchpoint" },

  { PIOCNWATCH,    "PIOCNWATCH",   "get number of watchpoints" },

#endif  /* irix watchpoints */

#ifdef PIOCGWIN                         /* solaris sparc */

  { PIOCGWIN,      "PIOCGWIN",     "get gwindows_t" },

#endif

#ifdef PIOCGXREG                        /* solaris sparc extra regs */

  { PIOCGXREGSIZE, "PIOCXREGSIZE", "get extra register state size" },

  { PIOCGXREG,     "PIOCGXREG",    "get extra register state" },

  { PIOCSXREG,     "PIOCSXREG",    "set extra register state" },

#endif /* XREG */

  { PIOCKILL,      "PIOCKILL",     "send signal" },

#ifdef PIOCLDT                          /* solaris i386 */

  { PIOCLDT,       "PIOCLDT",      "get LDT" },

  { PIOCNLDT,      "PIOCNLDT",     "get number of LDT entries" },

#endif

#ifdef PIOCLSTATUS                      /* solaris and unixware */

  { PIOCLSTATUS,   "PIOCLSTATUS",  "get status of all lwps" },

  { PIOCLUSAGE,    "PIOCLUSAGE",   "get resource usage of all lwps" },

  { PIOCOPENLWP,   "PIOCOPENLWP",  "get lwp file descriptor" },

  { PIOCLWPIDS,    "PIOCLWPIDS",   "get lwp identifiers" },

#endif /* LWP */

  { PIOCMAP,       "PIOCMAP",      "get memory map information" },

  { PIOCMAXSIG,    "PIOCMAXSIG",   "get max signal number" },

  { PIOCNICE,      "PIOCNICE",     "set nice priority" },

  { PIOCNMAP,      "PIOCNMAP",     "get number of memory mappings" },

  { PIOCOPENM,     "PIOCOPENM",    "open mapped object for reading" },

#ifdef PIOCOPENMOBS                     /* osf */

  { PIOCOPENMOBS,  "PIOCOPENMOBS", "open mapped object" },

#endif

#ifdef PIOCOPENPD       /* solaris */

  { PIOCOPENPD,    "PIOCOPENPD",   "get page data file descriptor" },

#endif

  { PIOCPSINFO,    "PIOCPSINFO",   "get ps(1) information" },

  { PIOCRESET,     "PIOCRESET",    "reset process flags" },

  { PIOCRFORK,     "PIOCRFORK",    "reset inherit-on-fork flag" },

  { PIOCRRLC,      "PIOCRRLC",     "reset run-on-last-close flag" },

  { PIOCRUN,       "PIOCRUN",      "make process runnable" },

#ifdef PIOCSAVECCNTRS                   /* irix */

  { PIOCSAVECCNTRS, "PIOCSAVECCNTRS", "parent gets child cntrs" },

#endif

  { PIOCSENTRY,    "PIOCSENTRY",   "set traced syscall entry set" },

  { PIOCSET,       "PIOCSET",      "set process flags" },

  { PIOCSEXIT,     "PIOCSEXIT",    "set traced syscall exit  set" },

  { PIOCSFAULT,    "PIOCSFAULT",   "set traced fault set" },

  { PIOCSFORK,     "PIOCSFORK",    "set inherit-on-fork flag" },

  { PIOCSFPREG,    "PIOCSFPREG",   "set floating point registers" },

  { PIOCSHOLD,     "PIOCSHOLD",    "set held signal set" },

  { PIOCSREG,      "PIOCSREG",     "set general registers" },

  { PIOCSRLC,      "PIOCSRLC",     "set run-on-last-close flag" },

  { PIOCSSIG,      "PIOCSSIG",     "set current signal" },

  { PIOCSTATUS,    "PIOCSTATUS",   "get process status" },

  { PIOCSTOP,      "PIOCSTOP",     "post stop request" },

  { PIOCSTRACE,    "PIOCSTRACE",   "set traced signal set" },

  { PIOCUNKILL,    "PIOCUNKILL",   "delete a signal" },

#ifdef PIOCUSAGE        /* solaris */

  { PIOCUSAGE,     "PIOCUSAGE",    "get resource usage" },

#endif

  { PIOCWSTOP,     "PIOCWSTOP",    "wait for process to stop" },

#ifdef PIOCNTHR                         /* osf threads */

  { PIOCNTHR,      "PIOCNTHR",     "get thread count" },

  { PIOCRTINH,     "PIOCRTINH",    "reset inherit-on-thread-creation" },

  { PIOCSTINH,     "PIOCSTINH",    "set   inherit-on-thread-creation" },

  { PIOCTLIST,     "PIOCTLIST",    "get thread ids" },

  { PIOCXPTH,      "PIOCXPTH",     "translate port to thread handle" },

  { PIOCTRUN,      "PIOCTRUN",     "make thread runnable" },

  { PIOCTSTATUS,   "PIOCTSTATUS",  "get thread status" },

  { PIOCTSTOP,     "PIOCTSTOP",    "stop a thread" },

  /* ... TGTRACE TSTRACE TSSIG TKILL TUNKILL TCFAULT TGFAULT TSFAULT

     TGFPREG TSFPREG TGREG TSREG TACTION TTERM TABRUN TGENTRY TSENTRY

     TGEXIT TSEXIT TSHOLD ... thread functions */

#endif /* osf threads */

  { -1,            NULL,           NULL }

};

int

ioctl_with_trace (fd, opcode, ptr, file, line)

     int  fd;

     long opcode;

     void *ptr;

     char *file;

     int  line;

{

  int i, ret, arg1;

  if (procfs_trace)

    {

      if (procfs_file == NULL && procfs_filename != NULL)

        procfs_file = fopen (procfs_filename, "a");

      for (i = 0; ioctl_table[i].name != NULL; i++)

        if (ioctl_table[i].value == opcode)

          break;

      if (info_verbose)

        fprintf (procfs_file ? procfs_file : stdout,

                 "%s:%d -- ", file, line);

      switch (opcode) {

      case PIOCSET:

        arg1 = ptr ? *(long *) ptr : 0;

        fprintf (procfs_file ? procfs_file : stdout,

                 "ioctl (PIOCSET,   %s) %s\n",

                 arg1 == PR_FORK  ? "PR_FORK"  :

                 arg1 == PR_RLC   ? "PR_RLC"   :

#ifdef PR_ASYNC

                 arg1 == PR_ASYNC ? "PR_ASYNC" :

#endif

                 "<unknown flag>",

                 info_verbose ? ioctl_table[i].desc : "");

        break;

      case PIOCRESET:

        arg1 = ptr ? *(long *) ptr : 0;

        fprintf (procfs_file ? procfs_file : stdout,

                 "ioctl (PIOCRESET, %s) %s\n",

                 arg1 == PR_FORK  ? "PR_FORK"  :

                 arg1 == PR_RLC   ? "PR_RLC"   :

#ifdef PR_ASYNC

                 arg1 == PR_ASYNC ? "PR_ASYNC" :

#endif

                 "<unknown flag>",

                 info_verbose ? ioctl_table[i].desc : "");

        break;

      case PIOCSTRACE:

        fprintf (procfs_file ? procfs_file : stdout,

                 "ioctl (PIOCSTRACE) ");

        proc_prettyfprint_signalset (procfs_file ? procfs_file : stdout,

                                     (sigset_t *) ptr, 0);

        break;

      case PIOCSFAULT:

        fprintf (procfs_file ? procfs_file : stdout,

                 "ioctl (%s) ",

                 opcode == PIOCSFAULT ? "PIOCSFAULT" : "PIOCGFAULT");

        proc_prettyfprint_faultset (procfs_file ? procfs_file : stdout,

                                    (fltset_t *) ptr, 0);

        break;

      case PIOCSENTRY:

        fprintf (procfs_file ? procfs_file : stdout,

                 "ioctl (%s) ",

                 opcode == PIOCSENTRY ? "PIOCSENTRY" : "PIOCGENTRY");

        proc_prettyfprint_syscalls (procfs_file ? procfs_file : stdout,

                                    (sysset_t *) ptr, 0);

        break;

      case PIOCSEXIT:

        fprintf (procfs_file ? procfs_file : stdout,

                 "ioctl (%s) ",

                 opcode == PIOCSEXIT ? "PIOCSEXIT" : "PIOCGEXIT");

        proc_prettyfprint_syscalls (procfs_file ? procfs_file : stdout,

                                    (sysset_t *) ptr, 0);

        break;

      case PIOCSHOLD:

        fprintf (procfs_file ? procfs_file : stdout,

                 "ioctl (%s) ",

                 opcode == PIOCSHOLD ? "PIOCSHOLD" : "PIOCGHOLD");

        proc_prettyfprint_signalset (procfs_file ? procfs_file : stdout,

                                     (sigset_t *) ptr, 0);

        break;

      case PIOCSSIG:

        fprintf (procfs_file ? procfs_file : stdout,

                 "ioctl (PIOCSSIG) ");

        proc_prettyfprint_signal (procfs_file ? procfs_file : stdout,

                                  ptr ? ((siginfo_t *) ptr)->si_signo : 0,

                                  0);

        fprintf (procfs_file ? procfs_file : stdout, "\n");

        break;

      case PIOCRUN:

        fprintf (procfs_file ? procfs_file : stdout,

                 "ioctl (PIOCRUN) ");

        arg1 = ptr ? *(long *) ptr : 0;

        if (arg1 & PRCSIG)

          fprintf (procfs_file ? procfs_file : stdout, "clearSig ");

        if (arg1 & PRCFAULT)

          fprintf (procfs_file ? procfs_file : stdout, "clearFlt ");

        if (arg1 & PRSTRACE)

          fprintf (procfs_file ? procfs_file : stdout, "setTrace ");

        if (arg1 & PRSHOLD)

          fprintf (procfs_file ? procfs_file : stdout, "setHold ");

        if (arg1 & PRSFAULT)

          fprintf (procfs_file ? procfs_file : stdout, "setFlt ");

        if (arg1 & PRSVADDR)

          fprintf (procfs_file ? procfs_file : stdout, "setVaddr ");

        if (arg1 & PRSTEP)

          fprintf (procfs_file ? procfs_file : stdout, "step ");

        if (arg1 & PRSABORT)

          fprintf (procfs_file ? procfs_file : stdout, "syscallAbort ");

        if (arg1 & PRSTOP)

          fprintf (procfs_file ? procfs_file : stdout, "stopReq ");

        fprintf (procfs_file ? procfs_file : stdout, "\n");

        break;

      case PIOCKILL:

        fprintf (procfs_file ? procfs_file : stdout,

                 "ioctl (PIOCKILL) ");

        proc_prettyfprint_signal (procfs_file ? procfs_file : stdout,

                                  ptr ? *(long *) ptr : 0, 0);

        fprintf (procfs_file ? procfs_file : stdout, "\n");

        break;

#ifdef PIOCSSPCACT

      case PIOCSSPCACT:

        fprintf (procfs_file ? procfs_file : stdout,

                 "ioctl (PIOCSSPCACT) ");

        arg1 = ptr ? *(long *) ptr : 0;

        if (arg1 & PRFS_STOPFORK)

          fprintf (procfs_file ? procfs_file : stdout, "stopFork ");

        if (arg1 & PRFS_STOPEXEC)

          fprintf (procfs_file ? procfs_file : stdout, "stopExec ");

        if (arg1 & PRFS_STOPTERM)

          fprintf (procfs_file ? procfs_file : stdout, "stopTerm ");

        if (arg1 & PRFS_STOPTCR)

          fprintf (procfs_file ? procfs_file : stdout, "stopThreadCreate ");

        if (arg1 & PRFS_STOPTTERM)

          fprintf (procfs_file ? procfs_file : stdout, "stopThreadTerm ");

        if (arg1 & PRFS_KOLC)

          fprintf (procfs_file ? procfs_file : stdout, "killOnLastClose ");

        fprintf (procfs_file ? procfs_file : stdout, "\n");

        break;

#endif /* PIOCSSPCACT */

      default:

        if (ioctl_table[i].name)

          fprintf (procfs_file ? procfs_file : stdout,

                   "ioctl (%s) %s\n",

                   ioctl_table[i].name,

                   info_verbose ? ioctl_table[i].desc : "");

        else

          fprintf (procfs_file ? procfs_file : stdout,

                   "ioctl (<unknown %ld (0x%lx)) \n", opcode, opcode);

        break;

      }

      if (procfs_file)

        fflush (procfs_file);

    }

  ret = ioctl (fd, opcode, ptr);

  if (procfs_trace && ret < 0)

    {

      fprintf (procfs_file ? procfs_file : stdout,

               "[ioctl (%s) FAILED!]\n",

               ioctl_table[i].name != NULL ?

               ioctl_table[i].name : "<unknown>");

      if (procfs_file)

        fflush (procfs_file);

    }

  return ret;

}

#else   /* NEW_PROC_API */

static struct trans rw_table[] = {

#ifdef PCAGENT                  /* solaris */

  { PCAGENT,  "PCAGENT",  "create agent lwp with regs from argument" },

#endif

  { PCCFAULT, "PCCFAULT", "clear current fault" },

#ifdef PCCSIG                   /* solaris */

  { PCCSIG,   "PCCSIG",   "clear current signal" },

#endif

  { PCDSTOP,  "PCDSTOP",  "post stop request" },

  { PCKILL,   "PCKILL",   "post a signal" },

  { PCNICE,   "PCNICE",   "set nice priority" },

#ifdef PCREAD                   /* solaris */

  { PCREAD,   "PCREAD",   "read from the address space" },

  { PCWRITE,  "PCWRITE",  "write to the address space" },

#endif

#ifdef PCRESET                  /* unixware */

  { PCRESET,  "PCRESET",  "unset modes" },

#endif

  { PCRUN,    "PCRUN",    "make process/lwp runnable" },

#ifdef PCSASRS                  /* solaris 2.7 only */

  { PCSASRS,  "PCSASRS",  "set ancillary state registers" },

#endif

#ifdef PCSCRED                  /* solaris */

  { PCSCRED,  "PCSCRED",  "set process credentials" },

#endif

  { PCSENTRY, "PCSENTRY", "set traced syscall entry set" },

  { PCSET,    "PCSET",    "set modes" },

  { PCSEXIT,  "PCSEXIT",  "set traced syscall exit  set" },

  { PCSFAULT, "PCSFAULT", "set traced fault set" },

  { PCSFPREG, "PCSFPREG", "set floating point registers" },

  { PCSHOLD,  "PCSHOLD",  "set signal mask" },

  { PCSREG,   "PCSREG",   "set general registers" },

  { PCSSIG,   "PCSSIG",   "set current signal" },

  { PCSTOP,   "PCSTOP",   "post stop request and wait" },

  { PCSTRACE, "PCSTRACE", "set traced signal set" },

#ifdef PCSVADDR                 /* solaris */

  { PCSVADDR, "PCSVADDR", "set pc virtual address" },

#endif

#ifdef PCSXREG                  /* solaris sparc only */

  { PCSXREG,  "PCSXREG",  "set extra registers" },

#endif

#ifdef PCTWSTOP                 /* solaris */

  { PCTWSTOP, "PCTWSTOP", "wait for stop, with timeout arg" },

#endif

  { PCUNKILL, "PCUNKILL", "delete a pending signal" },

#ifdef PCUNSET                  /* solaris */

  { PCUNSET,  "PCUNSET",  "unset modes" },

#endif

#ifdef PCWATCH                  /* solaris */

  { PCWATCH,  "PCWATCH",  "set/unset watched memory area" },

#endif

  { PCWSTOP,  "PCWSTOP",  "wait for process/lwp to stop, no timeout" },

  { 0,        NULL,      NULL }

};

static off_t lseek_offset;

int

write_with_trace (fd, arg, len, file, line)

     int  fd;

     long *arg;

     size_t len;

     char *file;

     int  line;

{

  int  i;

  long opcode = arg[0];

  int ret;

  if (procfs_trace)

    {

      if (procfs_file == NULL && procfs_filename != NULL)

        procfs_file = fopen (procfs_filename, "a");

      for (i = 0; rw_table[i].name != NULL; i++)

        if (rw_table[i].value == opcode)

          break;

      if (info_verbose)

        fprintf (procfs_file ? procfs_file : stdout,

                 "%s:%d -- ", file, line);

      switch (opcode) {

      case PCSET:

        fprintf (procfs_file ? procfs_file : stdout,

                 "write (PCSET,   %s) %s\n",

                 arg[1] == PR_FORK  ? "PR_FORK"  :

                 arg[1] == PR_RLC   ? "PR_RLC"   :

#ifdef PR_ASYNC

                 arg[1] == PR_ASYNC ? "PR_ASYNC" :

#endif

                 "<unknown flag>",

                 info_verbose ? rw_table[i].desc : "");

        break;

#ifdef PCUNSET

      case PCUNSET:

#endif

#ifdef PCRESET

      case PCRESET:

#endif

        fprintf (procfs_file ? procfs_file : stdout,

                 "write (PCRESET, %s) %s\n",

                 arg[1] == PR_FORK  ? "PR_FORK"  :

                 arg[1] == PR_RLC   ? "PR_RLC"   :

#ifdef PR_ASYNC

                 arg[1] == PR_ASYNC ? "PR_ASYNC" :

#endif

                 "<unknown flag>",

                 info_verbose ? rw_table[i].desc : "");

        break;

      case PCSTRACE:

        fprintf (procfs_file ? procfs_file : stdout,

                 "write (PCSTRACE) ");

        proc_prettyfprint_signalset (procfs_file ? procfs_file : stdout,

                                     (sigset_t *) &arg[1], 0);

        break;

      case PCSFAULT:

        fprintf (procfs_file ? procfs_file : stdout,

                 "write (PCSFAULT) ");

        proc_prettyfprint_faultset (procfs_file ? procfs_file : stdout,

                                    (fltset_t *) &arg[1], 0);

        break;

      case PCSENTRY:

        fprintf (procfs_file ? procfs_file : stdout,

                 "write (PCSENTRY) ");

        proc_prettyfprint_syscalls (procfs_file ? procfs_file : stdout,

                                    (sysset_t *) &arg[1], 0);

        break;

      case PCSEXIT:

        fprintf (procfs_file ? procfs_file : stdout,

                 "write (PCSEXIT) ");

        proc_prettyfprint_syscalls (procfs_file ? procfs_file : stdout,

                                    (sysset_t *) &arg[1], 0);

        break;

      case PCSHOLD:

        fprintf (procfs_file ? procfs_file : stdout,

                 "write (PCSHOLD) ");

        proc_prettyfprint_signalset (procfs_file ? procfs_file : stdout,

                                     (sigset_t *) &arg[1], 0);

        break;

      case PCSSIG:

        fprintf (procfs_file ? procfs_file : stdout,

                 "write (PCSSIG) ");

        proc_prettyfprint_signal (procfs_file ? procfs_file : stdout,

                                  arg[1] ? ((siginfo_t *) &arg[1])->si_signo

                                         : 0,

                                  0);

        fprintf (procfs_file ? procfs_file : stdout, "\n");

        break;

      case PCRUN:

        fprintf (procfs_file ? procfs_file : stdout,

                 "write (PCRUN) ");

        if (arg[1] & PRCSIG)

          fprintf (procfs_file ? procfs_file : stdout, "clearSig ");

        if (arg[1] & PRCFAULT)

          fprintf (procfs_file ? procfs_file : stdout, "clearFlt ");

        if (arg[1] & PRSTEP)

          fprintf (procfs_file ? procfs_file : stdout, "step ");

        if (arg[1] & PRSABORT)

          fprintf (procfs_file ? procfs_file : stdout, "syscallAbort ");

        if (arg[1] & PRSTOP)

          fprintf (procfs_file ? procfs_file : stdout, "stopReq ");

        fprintf (procfs_file ? procfs_file : stdout, "\n");

        break;

      case PCKILL:

        fprintf (procfs_file ? procfs_file : stdout,

                 "write (PCKILL) ");

        proc_prettyfprint_signal (procfs_file ? procfs_file : stdout,

                                  arg[1], 0);

        fprintf (procfs_file ? procfs_file : stdout, "\n");

        break;

      default:

        {

          static unsigned char break_insn[] = BREAKPOINT;

          if (len == sizeof (break_insn) &&

              memcmp (arg, &break_insn, len) == 0)

            fprintf (procfs_file ? procfs_file : stdout,

                     "write (<breakpoint at 0x%08x>) \n", lseek_offset);

          else if (rw_table[i].name)

            fprintf (procfs_file ? procfs_file : stdout,

                     "write (%s) %s\n",

                     rw_table[i].name,

                     info_verbose ? rw_table[i].desc : "");

          else

            {

              if (lseek_offset != -1)

                fprintf (procfs_file ? procfs_file : stdout,

                         "write (<unknown>, %d bytes at 0x%08x) \n",

                         len, lseek_offset);

              else

                fprintf (procfs_file ? procfs_file : stdout,

                         "write (<unknown>, %d bytes) \n", len);

            }

          break;

        }

      }

      if (procfs_file)

        fflush (procfs_file);

    }

  ret = write (fd, arg, len);

  if (procfs_trace && ret != len)

    {

      fprintf (procfs_file ? procfs_file : stdout,

               "[write (%s) FAILED!\n",

               rw_table[i].name != NULL ?

               rw_table[i].name : "<unknown>");

      if (procfs_file)

        fflush (procfs_file);

    }

  lseek_offset = -1;

  return ret;

}

off_t

lseek_with_trace (fd, offset, whence, file, line)

     int fd;

     off_t offset;

     int whence;

     char *file;

     int line;

{

  off_t ret;