pkglib_LTLIBRARIES = libdistrencommon.la

#evidently the following should not be LDADD, but LDFLAGS because automake doesn't like the idea of LDADD for libraries for some reason... or I am very confused

libdistrencommon_la_LIBADD = @DISTLIBS_LIBS@

libdistrencommon_la_CXXFLAGS = @DISTLIBS_CFLAGS@

#see http://sources.redhat.com/autobook/autobook/autobook_91.html

# either increase the revision number or the interface number each release!

libdistrencommon_la_LDFLAGS = -version-info 0:0:0

/*

  Copyright 2008 Nathan Phillip Brink, Ethan Zonca

  This file is a part of DistRen.

  DistRen is free software: you can redistribute it and/or modify

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

  the Free Software Foundation, either version 3 of the License, or

  (at your option) any later version.

  DistRen 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 Affero General Public License for more details.

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

  along with DistRen.  If not, see <http://www.gnu.org/licenses/>.

*/

/* The purpose of this file is to... */

#include "options.h"

#include <confuse.h>

#include <string.h>

#include <stdio.h>

#include <stdlib.h>

struct options_common_data 

{

  cfg_t *cfg;

};

int options_init(int argc, char *argv[], cfg_t **mycfg, cfg_opt_t *myopts, char *myname, struct options_common **allopts)

{

  char *configfile;

  size_t i;

  /* For those of you who don't know, the following is an example of concatenation of constant strings by the C compiler. Now, that doesn't mean you can do run-time string concatenation ;-) 

   strdup is because someday configfile will be customizable via argv[]

   */

  i = strlen(SYSCONFDIR "/distren.conf") + strlen(myname) + 1;

  configfile = malloc(i);

  if(!configfile)

    {

      perror("malloc");

      return 1;

    }

  strncpy(configfile, SYSCONFDIR "/distren", strlen(SYSCONFDIR "/distren") + 1);

  strcat(configfile, myname);

  strcat(configfile, ".conf");

  *allopts = malloc(sizeof(struct options_common));

  if(!*allopts)

    {

      perror("malloc");

      free(configfile);

      return 1;

    }

  memset(*allopts, '\0', sizeof(struct options_common));

  (*allopts)->data = malloc(sizeof(struct options_common_data));

  if(!(*allopts)->data)

    {

      perror("malloc");

      free(configfile);

      free(*allopts);

      return 1;

    }

  memset((*allopts)->data, '\0', sizeof(struct options_common_data));

  cfg_opt_t common_opts[] =

    {

      CFG_END()

    };

  /*

    In these arrays, I should replace NULL with a pointer to a string in the struct which should hold the result of confuse processing an option. This is partially because confuse will not free the values it parses.

   */

  cfg_opt_t server_opts[] = 

    {

      CFG_STR("username", NULL, CFGF_NONE),

      CFG_STR("hostname", NULL, CFGF_NONE),

      CFG_STR("method", "ssh", CFGF_NONE),

      CFG_STR_LIST("types", NULL, CFGF_NONE),

      CFG_END()

    };

  cfg_opt_t opts[] =

    {

      CFG_SEC("common",

	      common_opts,

	      CFGF_NONE),

      CFG_SEC("server",

	      server_opts,

	      CFGF_MULTI | CFGF_TITLE),

      CFG_SEC(myname,

	      myopts,

	      0),

      CFG_FUNC("include",

	       &cfg_include),

      CFG_END()

    };

  (*allopts)->data->cfg = cfg_init(opts, 0);

  switch(cfg_parse((*allopts)->data->cfg, configfile))

    {

    default:

      fprintf(stderr, "cfg_parse returned an unknown error code\n");

    case CFG_FILE_ERROR:

      cfg_error((*allopts)->data->cfg, "Couldn't open file ``%s''\n", configfile);

      /* no break; on purpose */

    case CFG_PARSE_ERROR:

      free((*allopts)->data);

      free(*allopts);

      free(configfile);

      return 1;

    case CFG_SUCCESS:

      break;

    }

  free(configfile);

  *mycfg = cfg_getsec((*allopts)->data->cfg, myname);

  return 0;

}

int options_free(struct options_common *opts)

{

  /* free the other common_options struct's members */

  cfg_free(opts->data->cfg);

  free(opts->data);

  free(opts);

  return 0;

}

/*

  Copyright 2009 Nathan Phillip Brink

  This file is a part of DistRen.

  DistRen is free software: you can redistribute it and/or modify

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

  the Free Software Foundation, either version 3 of the License, or

  (at your option) any later version.

  DistRen 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 Affero General Public License for more details.

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

  along with DistRen.  If not, see <http://www.gnu.org/licenses/>.

*/

#include "remoteio.h"

#include "execio.h"

#include <stdlib.h>

#include <stdio.h>

{

  char *sshargs[] = {"ssh", servername, "distrend", "-d", (char *)NULL};

  int rtn;

  *rem = malloc(sizeof(struct remoteio));

  rtn = execio_open( &(*rem)->execio, "ssh", sshargs);

  if(rtn)

    {

      fprintf(stderr, "error opening remoteio channel to server ``%s''" , servername);

      free(*rem);

      return 1;

    }

  return 0;

}

int remoteio_read(struct remoteio *rem, void *buf, size_t len, size_t *bytesread)

{

  return execio_read(rem->execio, buf, len, bytesread);

}

int remoteio_write(struct remoteio *rem, void *buf, size_t len, size_t *byteswritten)

{

  return execio_write(rem->execio, buf, len, byteswritten);

}

int remoteio_close(struct remoteio *rem)

{

  int rtn;

  rtn = execio_close(rem->execio);

  free(rem);

  return 0 + rtn;

}

/*

  Copyright 2009 Nathan Phillip Brink, Ethan Zonca

  This file is a part of DistRen.

  DistRen is free software: you can redistribute it and/or modify

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

  the Free Software Foundation, either version 3 of the License, or

  (at your option) any later version.

  DistRen 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 Affero General Public License for more details.

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

  along with DistRen.  If not, see <http://www.gnu.org/licenses/>.

*/

#ifndef _DISTREN_REMOTEIO_H

#define _DISTREN_REMOTEIO_H

#include <stdlib.h>

/*

  RemoteIO provides an abstraction to the method of talking to a remote distrend. It is a layer on top of execio that should provide an equivalent interface.

 */

struct remoteio {

  struct execio *execio;

};

/**

   Opens connection with remote distrend. Returns 1 on error.

   @todo should this be asynchronous?

 */

/**

   non-blocking I/O.

   @return 0 on success, 1 on failure

 */

int remoteio_read(struct remoteio *rem, void *buf, size_t len, size_t *bytesread);

int remoteio_write(struct remoteio *rem, void *buf, size_t len, size_t *byteswritten);

/**

   Closes a remoteio session.

   @return nonzero on error

*/

int remoteio_close(struct remoteio *rem);

#endif