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//==========================================================================

//

//      ./agent/current/src/mibgroup/util_funcs.c

//

//

//==========================================================================

// ####ECOSGPLCOPYRIGHTBEGIN####                                            

// -------------------------------------------                              

// This file is part of eCos, the Embedded Configurable Operating System.   

// Copyright (C) 1998, 1999, 2000, 2001, 2002 Free Software Foundation, Inc.

//

// eCos 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 or (at your option) any later      

// version.                                                                 

//

// eCos 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 eCos; if not, write to the Free Software Foundation, Inc.,    

// 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.            

//

// As a special exception, if other files instantiate templates or use      

// macros or inline functions from this file, or you compile this file      

// and link it with other works to produce a work based on this file,       

// this file does not by itself cause the resulting work to be covered by   

// the GNU General Public License. However the source code for this file    

// must still be made available in accordance with section (3) of the GNU   

// General Public License v2.                                               

//

// This exception does not invalidate any other reasons why a work based    

// on this file might be covered by the GNU General Public License.         

// -------------------------------------------                              

// ####ECOSGPLCOPYRIGHTEND####                                              

//####UCDSNMPCOPYRIGHTBEGIN####

//

// -------------------------------------------

//

// Portions of this software may have been derived from the UCD-SNMP

// project,  <http://ucd-snmp.ucdavis.edu/>  from the University of

// California at Davis, which was originally based on the Carnegie Mellon

// University SNMP implementation.  Portions of this software are therefore

// covered by the appropriate copyright disclaimers included herein.

//

// The release used was version 4.1.2 of May 2000.  "ucd-snmp-4.1.2"

// -------------------------------------------

//

//####UCDSNMPCOPYRIGHTEND####

//==========================================================================

//#####DESCRIPTIONBEGIN####

//

// Author(s):    hmt

// Contributors: hmt

// Date:         2000-05-30

// Purpose:      Port of UCD-SNMP distribution to eCos.

// Description:  

//              

//

//####DESCRIPTIONEND####

//

//==========================================================================

/********************************************************************

       Copyright 1989, 1991, 1992 by Carnegie Mellon University

                          Derivative Work -

Copyright 1996, 1998, 1999, 2000 The Regents of the University of California

                         All Rights Reserved

Permission to use, copy, modify and distribute this software and its

documentation for any purpose and without fee is hereby granted,

provided that the above copyright notice appears in all copies and

that both that copyright notice and this permission notice appear in

supporting documentation, and that the name of CMU and The Regents of

the University of California not be used in advertising or publicity

pertaining to distribution of the software without specific written

permission.

CMU AND THE REGENTS OF THE UNIVERSITY OF CALIFORNIA DISCLAIM ALL

WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED

WARRANTIES OF MERCHANTABILITY AND FITNESS.  IN NO EVENT SHALL CMU OR

THE REGENTS OF THE UNIVERSITY OF CALIFORNIA BE LIABLE FOR ANY SPECIAL,

INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING

FROM THE LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF

CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN

CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.

*********************************************************************/

/*

 * util_funcs.c

 */

#include <config.h>

#if HAVE_IO_H

#include <io.h>

#endif

#include <stdio.h>

#if HAVE_STDLIB_H

#include <stdlib.h>

#endif

#if HAVE_MALLOC_H

#include <malloc.h>

#endif

#include <sys/types.h>

#ifdef __alpha

#ifndef _BSD

#define _BSD

#define _myBSD

#endif

#endif

#if HAVE_SYS_WAIT_H

# include <sys/wait.h>

#endif

#ifdef __alpha

#ifdef _myBSD

#undef _BSD

#undef _myBSD

#endif

#endif

#ifndef WEXITSTATUS

# define WEXITSTATUS(stat_val) ((unsigned)(stat_val) >> 8)

#endif

#ifndef WIFEXITED

# define WIFEXITED(stat_val) (((stat_val) & 255) == 0)

#endif

#if TIME_WITH_SYS_TIME

# ifdef WIN32

#  include <sys/timeb.h>

# else

#  include <sys/time.h>

# endif

# include <time.h>

#else

# if HAVE_SYS_TIME_H

#  include <sys/time.h>

# else

#  include <time.h>

# endif

#endif

#if HAVE_UNISTD_H

#include <unistd.h>

#endif

#if HAVE_FCNTL_H

#include <fcntl.h>

#endif

#include <errno.h>

#include <signal.h>

#if HAVE_STRING_H

#include <string.h>

#else

#include <strings.h>

#endif

#include <ctype.h>

#if HAVE_WINSOCK_H

#include <winsock.h>

#endif

#if HAVE_BASETSD_H

#include <basetsd.h>

#define ssize_t SSIZE_T

#endif

#if HAVE_RAISE

#define alarm raise

#endif

#include "mibincl.h"

#include "mibgroup/struct.h"

#include "mibgroup/util_funcs.h"

#include "system.h"

#if HAVE_LIMITS_H

#include "limits.h"

#endif

#ifdef USING_UCD_SNMP_ERRORMIB_MODULE

#include "ucd-snmp/errormib.h"

#else

#define setPerrorstatus(x) snmp_log_perror(x)

#endif

#include "read_config.h"

#ifdef EXCACHETIME

static long cachetime;

#endif

extern int numprocs, numextens;

void

Exit(int var)

{

  snmp_log(LOG_ERR, "Server Exiting with code %d\n",var);

  exit(var);

}

int shell_command(struct extensible *ex)

{

#if HAVE_SYSTEM

  char shellline[STRMAX];

  FILE *shellout;

  sprintf(shellline,"%s > /tmp/shoutput",ex->command);

  ex->result = system(shellline);

  ex->result = WEXITSTATUS(ex->result);

  shellout = fopen("/tmp/shoutput","r");

  if((shellout = fopen("/tmp/shoutput","r")) != NULL) {

    if (fgets(ex->output,STRMAX,shellout) == NULL) {

      ex->output[0] = 0;

    }

    fclose(shellout);

  }

  unlink("/tmp/shoutput");

#else

  ex->output[0] = 0;

  ex->result = 0;

#endif

  return(ex->result);

}

#define MAXOUTPUT 300

int exec_command(struct extensible *ex)

{

#if HAVE_EXECV

  int fd;

  FILE *file;

  if ((fd = get_exec_output(ex))) {

    file = fdopen(fd,"r");

    if (fgets(ex->output,STRMAX,file) == NULL) {

      ex->output[0] = 0;

    }

    fclose(file);

    wait_on_exec(ex);

  } else

#endif

  {

    ex->output[0] = 0;

    ex->result = 0;

  }

  return(ex->result);

}

void wait_on_exec(struct extensible *ex)

{

#ifndef __ECOS

#ifndef EXCACHETIME

    if (ex->pid && waitpid(ex->pid,&ex->result,0) < 0) {

      setPerrorstatus("waitpid");

    }

    ex->pid = 0;

#endif

#endif

}

#define MAXARGS 30

int get_exec_output(struct extensible *ex)

{

#if HAVE_EXECV

  int fd[2],i, cnt;

  char ctmp[STRMAX], *cptr1, *cptr2, argvs[STRMAX], **argv, **aptr;

#ifdef EXCACHETIME

  char cache[MAXCACHESIZE];

  ssize_t cachebytes;

  long curtime;

  static char lastcmd[STRMAX];

  int cfd;

  static int lastresult;

  int readcount;

#endif

#ifdef EXCACHETIME

  curtime = time(NULL);

  if (curtime > (cachetime + EXCACHETIME) ||

      strcmp(ex->command, lastcmd) != 0) {

    strcpy(lastcmd,ex->command);

    cachetime = curtime;

#endif

    if (pipe(fd))

      {

        setPerrorstatus("pipe");

#ifdef EXCACHETIME

        cachetime = 0;

#endif

        return 0;

      }

    if ((ex->pid = fork()) == 0)

      {

        close(1);

        if (dup(fd[1]) != 1)

          {

            setPerrorstatus("dup");

            return 0;

          }

        close(fd[1]);

        close(fd[0]);

        for(cnt=1,cptr1 = ex->command, cptr2 = argvs; *cptr1 != 0;

            cptr2++, cptr1++) {

          *cptr2 = *cptr1;

          if (*cptr1 == ' ') {

            *(cptr2++) = 0;

            cptr1 = skip_white(cptr1);

            *cptr2 = *cptr1;

            if (*cptr1 != 0) cnt++;

          }

        }

        *cptr2 = 0;

        *(cptr2+1) = 0;

        argv = (char **) malloc((cnt+2) * sizeof(char *));

        if (argv == NULL)

          return 0; /* memory alloc error */

        aptr = argv;

        *(aptr++) = argvs;

        for (cptr2 = argvs, i=1; i != cnt; cptr2++)

          if (*cptr2 == 0) {

            *(aptr++) = cptr2 + 1;

            i++;

          }

        while (*cptr2 != 0) cptr2++;

        *(aptr++) = NULL;

        copy_word(ex->command,ctmp);

        execv(ctmp,argv);

        snmp_log_perror(ctmp);

        exit(1);

      }

    else

      {

        close(fd[1]);

        if (ex->pid < 0) {

          close(fd[0]);

          setPerrorstatus("fork");

#ifdef EXCACHETIME

          cachetime = 0;

#endif

          return 0;

        }

#ifdef EXCACHETIME

        unlink(CACHEFILE);

        /* XXX  Use SNMP_FILEMODE_CLOSED instead of 644? */

        if ((cfd = open(CACHEFILE,O_WRONLY|O_TRUNC|O_CREAT,0644)) < 0) {

          setPerrorstatus("open");

          cachetime = 0;

          return 0;

        }

        fcntl(fd[0],F_SETFL,O_NONBLOCK);  /* don't block on reads */

#ifdef HAVE_USLEEP

        for (readcount = 0; readcount <= MAXREADCOUNT*100 &&

               (cachebytes = read(fd[0],(void *)cache,MAXCACHESIZE));

             readcount++) {

#else

        for (readcount = 0; readcount <= MAXREADCOUNT &&

               (cachebytes = read(fd[0],(void *)cache,MAXCACHESIZE));

             readcount++) {

#endif

          if (cachebytes > 0)

            write(cfd,(void *) cache, cachebytes);

          else if (cachebytes == -1 && errno != EAGAIN) {

            setPerrorstatus("read");

            break;

          }

          else

#ifdef HAVE_USLEEP

            usleep (10000);     /* sleeps for 0.01 sec */

#else

            sleep (1);

#endif

        }

        close(cfd);

        close(fd[0]);

        /* wait for the child to finish */

        if (ex->pid > 0 && waitpid(ex->pid,&ex->result,0) < 0) {

          setPerrorstatus("waitpid()");

          cachetime = 0;

          return 0;

        }

        ex->pid = 0;

        ex->result = WEXITSTATUS(ex->result);

        lastresult = ex->result;

#else /* !EXCACHETIME */

        return(fd[0]);

#endif

      }

#ifdef EXCACHETIME

  }

  else {

      ex->result = lastresult;

  }

  if ((cfd = open(CACHEFILE,O_RDONLY)) < 0) {

    setPerrorstatus("open");

    return 0;

  }

  return(cfd);

#endif

#else /* !HAVE_EXECV */

  return 0;

#endif

}

int get_exec_pipes(char *cmd,

                   int *fdIn,

                   int *fdOut,

                   int *pid)

{

#if HAVE_EXECV

  int fd[2][2],i, cnt;

  char ctmp[STRMAX], *cptr1, *cptr2, argvs[STRMAX], **argv, **aptr;

  /* Setup our pipes */

  if (pipe(fd[0]) || pipe(fd[1]))

    {

      setPerrorstatus("pipe");

      return 0;

    }

  if ((*pid = fork()) == 0)   /* First handle for the child */

    {

      close(0);

      if (dup(fd[0][0]) != 0)

        {

          setPerrorstatus("dup");

          return 0;

        }

      close(1);

      if (dup(fd[1][1]) != 1)

        {

          setPerrorstatus("dup");

          return 0;

        }

      close(fd[0][0]);

      close(fd[0][1]);

      close(fd[1][0]);

      close(fd[1][1]);

      for(cnt=1,cptr1 = cmd, cptr2 = argvs; *cptr1 != 0;

          cptr2++, cptr1++) {

        *cptr2 = *cptr1;

        if (*cptr1 == ' ') {

          *(cptr2++) = 0;

          cptr1 = skip_white(cptr1);

          *cptr2 = *cptr1;

          if (*cptr1 != 0) cnt++;

        }

      }

      *cptr2 = 0;

      *(cptr2+1) = 0;

      argv = (char **) malloc((cnt+2) * sizeof(char *));

      if (argv == NULL)

        return 0; /* memory alloc error */

      aptr = argv;

      *(aptr++) = argvs;

      for (cptr2 = argvs, i=1; i != cnt; cptr2++)

        if (*cptr2 == 0) {

          *(aptr++) = cptr2 + 1;

          i++;

        }

      while (*cptr2 != 0) cptr2++;

      *(aptr++) = NULL;

      copy_word(cmd,ctmp);

      execv(ctmp,argv);

      snmp_log_perror("execv");

      exit(1);

    }

  else

    {

      close(fd[0][0]);

      close(fd[1][1]);

      if (*pid < 0) {

        close(fd[0][1]);

        close(fd[1][0]);

        setPerrorstatus("fork");

        return 0;

      }

      *fdIn = fd[1][0];

      *fdOut = fd[0][1];

      return(1); /* We are returning 0 for error... */

    }

#endif /* !HAVE_EXECV */

  return 0;

}

int clear_cache(int action,

                u_char *var_val,

                u_char var_val_type,

                size_t var_val_len,

                u_char *statP,

                oid *name,

                size_t name_len)

{

  long tmp=0;

  if (var_val_type != ASN_INTEGER) {

    snmp_log(LOG_NOTICE, "Wrong type != int\n");

    return SNMP_ERR_WRONGTYPE;

  }

  tmp = *((long *) var_val);

  if (tmp == 1 && action == COMMIT) {

#ifdef EXCACHETIME

    cachetime = 0;                      /* reset the cache next read */

#endif 

  }

  return SNMP_ERR_NOERROR;

}

char **argvrestartp, *argvrestartname, *argvrestart;

RETSIGTYPE restart_doit(int a)

{

  int i;

  /* close everything open */

  for (i=0; i<= 2; i++)

    close(i);

  /* do the exec */

#if HAVE_EXECV

  execv(argvrestartname,argvrestartp);

  setPerrorstatus("execv");

#endif

}

int

restart_hook(int action,

             u_char *var_val,

             u_char var_val_type,

             size_t var_val_len,

             u_char *statP,

             oid *name,

             size_t name_len)

{

  long tmp=0;

  if (var_val_type != ASN_INTEGER) {

    snmp_log(LOG_NOTICE, "Wrong type != int\n");

    return SNMP_ERR_WRONGTYPE;

  }

  tmp = *((long *) var_val);

  if (tmp == 1 && action == COMMIT) {

#ifdef SIGALRM

    signal(SIGALRM,restart_doit);

#endif

#ifndef __ECOS

    alarm(RESTARTSLEEP);

#endif

  }

  return SNMP_ERR_NOERROR;

}

void

print_mib_oid(oid name[],

              size_t len)

{

  char *buffer;

  buffer=malloc(11*len); /* maximum digit lengths for int32 + a '.' */

  if (!buffer) {

    snmp_log(LOG_ERR, "Malloc failed - out of memory?");

    return;

  }

  sprint_mib_oid(buffer, name, len);

  snmp_log(LOG_NOTICE, "Mib: %s\n", buffer);

  free(buffer);

}

void

sprint_mib_oid(char *buf,

               oid name[],

               size_t len)

{

  int i;

  for(i=0; i < (int)len; i++) {

    sprintf(buf,".%d",(int) name[i]);

    while (*buf != 0)

      buf++;

  }

}

/*******************************************************************-o-******

 * header_simple_table

 *

 * Parameters:

 *        *vp            Variable data.

 *        *name          Fully instantiated OID name.

 *        *length        Length of name.

 *         exact         TRUE if an exact match is desired.

 *        *var_len       Hook for size of returned data type.

 *      (**write_method) Hook for write method (UNUSED).

 *         max

 *

 * Returns:

 *      0        If name matches vp->name (accounting for 'exact') and is

 *                      not greater in length than 'max'.

 *      1       Otherwise.

 *

 *

 * Compare 'name' to vp->name for the best match or an exact match (if

 *      requested).  Also check that 'name' is not longer than 'max' if

 *      max is greater-than/equal 0.

 * Store a successful match in 'name', and increment the OID instance if

 *      the match was not exact.

 *

 * 'name' and 'length' are undefined upon failure.

 *

 */

int header_simple_table(struct variable *vp, oid *name, size_t *length,

                        int exact, size_t *var_len,

                        WriteMethod **write_method, int max)

{

  int   i,

        rtest;  /* Set to:      -1      If name < vp->name,

                 *              1       If name > vp->name,

                 *              0        Otherwise.

                 */

  oid newname[MAX_OID_LEN];

  for(i=0,rtest=0; i < (int) vp->namelen && i < (int)(*length) && !rtest; i++) {

    if (name[i] != vp->name[i]) {

      if (name[i] < vp->name[i])

        rtest = -1;

      else

        rtest = 1;

    }

  }

  if (rtest > 0 ||

      (rtest == 0 && !exact && (int)(vp->namelen+1) < (int) *length) ||

    (exact == 1 && (rtest || (int)*length != (int)(vp->namelen+1)))) {

    if (var_len)

        *var_len = 0;

    return MATCH_FAILED;

  }

  memset(newname, 0, sizeof(newname));

  if (((int) *length) <= (int) vp->namelen || rtest == -1) {

    memmove(newname, vp->name, (int)vp->namelen * sizeof (oid));

    newname[vp->namelen] = 1;

    *length = vp->namelen+1;

  }

  else {

    *length = vp->namelen+1;

    memmove(newname, name, (*length) * sizeof(oid));

    if (!exact)

      newname[*length-1] = name[*length-1] + 1;

    else

      newname[*length-1] = name[*length-1];

  }

  if (max >= 0 && ((int)newname[*length-1] > max)) {

    if(var_len)

      *var_len = 0;

    return MATCH_FAILED;

  }

  memmove(name, newname, (*length) * sizeof(oid));

  if (write_method)

    *write_method = 0;

  if (var_len)

    *var_len = sizeof(long);   /* default */

  return(MATCH_SUCCEEDED);

}

/*

  header_generic(...

  Arguments:

  vp      IN      - pointer to variable entry that points here