/* tinit.c
   Initialize for reading Taylor UUCP configuration files.

   Copyright (C) 1992, 1993, 1994 Ian Lance Taylor

   This file is part of the Taylor UUCP uuconf library.

   This library is free software; you can redistribute it and/or
   modify it under the terms of the GNU Library General Public License
   as published by the Free Software Foundation; either version 2 of
   the License, or (at your option) any later version.

   This library 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
   Library General Public License for more details.

   You should have received a copy of the GNU Library General Public
   License along with this library; if not, write to the Free Software
   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.

   The author of the program may be contacted at ian@airs.com or
   c/o Cygnus Support, Building 200, 1 Kendall Square, Cambridge, MA 02139.
   */

#include "uucnfi.h"

#if USE_RCS_ID
const char _uuconf_tinit_rcsid[] = "$Id: tinit.c,v 1.10 1994/01/30 21:14:29 ian Rel $";
#endif

#include <errno.h>

/* Local functions.  */

static int itset_default P((struct sglobal *qglobal, char ***ppzvar,
			    const char *zfile));
static int itdebug P((pointer pglobal, int argc, char **argv, pointer pvar,
		      pointer pinfo));
static int itaddfile P((pointer pglobal, int argc, char **argv, pointer pvar,
			pointer pinfo));
static int itunknown P((pointer pglobal, int argc, char **argv, pointer pvar,
			pointer pinfo));
static int itprogram P((pointer pglobal, int argc, char **argv, pointer pvar,
			pointer pinfo));

static const struct cmdtab_offset asCmds[] =
{
  { "nodename", UUCONF_CMDTABTYPE_STRING,
      offsetof (struct sprocess, zlocalname), NULL },
  { "hostname", UUCONF_CMDTABTYPE_STRING,
      offsetof (struct sprocess, zlocalname), NULL },
  { "uuname", UUCONF_CMDTABTYPE_STRING,
      offsetof (struct sprocess, zlocalname), NULL },
  { "spool", UUCONF_CMDTABTYPE_STRING,
      offsetof (struct sprocess, zspooldir), NULL },
  { "pubdir", UUCONF_CMDTABTYPE_STRING,
      offsetof (struct sprocess, zpubdir), NULL },
  { "lockdir", UUCONF_CMDTABTYPE_STRING,
      offsetof (struct sprocess, zlockdir), NULL },
  { "logfile", UUCONF_CMDTABTYPE_STRING,
      offsetof (struct sprocess, zlogfile), NULL },
  { "statfile", UUCONF_CMDTABTYPE_STRING,
      offsetof (struct sprocess, zstatsfile), NULL },
  { "debugfile", UUCONF_CMDTABTYPE_STRING,
      offsetof (struct sprocess, zdebugfile), NULL },
  { "debug", UUCONF_CMDTABTYPE_FN | 0,
      offsetof (struct sprocess, zdebug), itdebug },
  { "max-uuxqts", UUCONF_CMDTABTYPE_INT,
      offsetof (struct sprocess, cmaxuuxqts), NULL },
  { "run-uuxqt", UUCONF_CMDTABTYPE_STRING,
      offsetof (struct sprocess, zrunuuxqt), NULL },
  { "sysfile", UUCONF_CMDTABTYPE_FN | 0,
      offsetof (struct sprocess, pzsysfiles), itaddfile },
  { "portfile", UUCONF_CMDTABTYPE_FN | 0,
      offsetof (struct sprocess, pzportfiles), itaddfile },
  { "dialfile", UUCONF_CMDTABTYPE_FN | 0,
      offsetof (struct sprocess, pzdialfiles), itaddfile },
  { "dialcodefile", UUCONF_CMDTABTYPE_FN | 0,
      offsetof (struct sprocess, pzdialcodefiles), itaddfile },
  { "callfile", UUCONF_CMDTABTYPE_FN | 0,
      offsetof (struct sprocess, pzcallfiles), itaddfile },
  { "passwdfile", UUCONF_CMDTABTYPE_FN | 0,
      offsetof (struct sprocess, pzpwdfiles), itaddfile },
  { "unknown", UUCONF_CMDTABTYPE_FN, offsetof (struct sprocess, qunknown),
      itunknown },
  { "v2-files", UUCONF_CMDTABTYPE_BOOLEAN,
      offsetof (struct sprocess, fv2), NULL },
  { "hdb-files", UUCONF_CMDTABTYPE_BOOLEAN,
      offsetof (struct sprocess, fhdb), NULL },
  { "bnu-files", UUCONF_CMDTABTYPE_BOOLEAN,
      offsetof (struct sprocess, fhdb), NULL },
  { "timetable", UUCONF_CMDTABTYPE_FN | 3,
      offsetof (struct sprocess, pztimetables), _uuconf_itimetable },
  { NULL, 0, 0, NULL }
};

#define CCMDS (sizeof asCmds / sizeof asCmds[0])

/* This structure is used to pass information into the command table
   functions.  */

struct sinfo
{
  /* The program name.  */
  const char *zname;
  /* A pointer to the command table being used, passed to isystem so
     it can call uuconf_cmd_args.  */
  struct uuconf_cmdtab *qcmds;
};

/* Initialize the routines which read the Taylor UUCP configuration
   files.  */

int
uuconf_taylor_init (ppglobal, zprogram, zname)
     pointer *ppglobal;
     const char *zprogram;
     const char *zname;
{
  struct sglobal **pqglobal = (struct sglobal **) ppglobal;
  int iret;
  char *zcopy;
  struct sglobal *qglobal;
  boolean fdefault;
  FILE *e;
  struct sinfo si;

  if (*pqglobal == NULL)
    {
      iret = _uuconf_iinit_global (pqglobal);
      if (iret != UUCONF_SUCCESS)
	return iret;
    }

  qglobal = *pqglobal;

  if (zname != NULL)
    {
      size_t csize;

      csize = strlen (zname) + 1;
      zcopy = uuconf_malloc (qglobal->pblock, csize);
      if (zcopy == NULL)
	{
	  qglobal->ierrno = errno;
	  return UUCONF_MALLOC_FAILED | UUCONF_ERROR_ERRNO;
	}
      memcpy ((pointer) zcopy, (pointer) zname, csize);
      fdefault = FALSE;
    }
  else
    {
      zcopy = uuconf_malloc (qglobal->pblock,
			     sizeof NEWCONFIGLIB + sizeof CONFIGFILE - 1);
      if (zcopy == NULL)
	{
	  qglobal->ierrno = errno;
	  return UUCONF_MALLOC_FAILED | UUCONF_ERROR_ERRNO;
	}
      memcpy ((pointer) zcopy, (pointer) NEWCONFIGLIB,
	      sizeof NEWCONFIGLIB - 1);
      memcpy ((pointer) (zcopy + sizeof NEWCONFIGLIB - 1),
	      (pointer) CONFIGFILE, sizeof CONFIGFILE);
      fdefault = TRUE;
    }

  qglobal->qprocess->zconfigfile = zcopy;

  e = fopen (zcopy, "r");
  if (e == NULL)
    {
      if (! fdefault)
	{
	  qglobal->ierrno = errno;
	  qglobal->zfilename = zcopy;
	  return (UUCONF_FOPEN_FAILED
		  | UUCONF_ERROR_ERRNO
		  | UUCONF_ERROR_FILENAME);
	}

      /* There is no config file, so just use the default values.  */
    }
  else
    {
      struct uuconf_cmdtab as[CCMDS];

      _uuconf_ucmdtab_base (asCmds, CCMDS, (char *) qglobal->qprocess,
			    as);

      if (zprogram == NULL)
	zprogram = "uucp";

      si.zname = zprogram;
      si.qcmds = as;
      iret = uuconf_cmd_file (qglobal, e, as, (pointer) &si, itprogram,
			      UUCONF_CMDTABFLAG_BACKSLASH,
			      qglobal->pblock);

      (void) fclose (e);

      if (iret != UUCONF_SUCCESS)
	{
	  qglobal->zfilename = zcopy;
	  return iret | UUCONF_ERROR_FILENAME;
	}
    }

  /* Get the defaults for the file names.  */

  iret = itset_default (qglobal, &qglobal->qprocess->pzsysfiles, SYSFILE);
  if (iret != UUCONF_SUCCESS)
    return iret;
  iret = itset_default (qglobal, &qglobal->qprocess->pzportfiles, PORTFILE);
  if (iret != UUCONF_SUCCESS)
    return iret;
  iret = itset_default (qglobal, &qglobal->qprocess->pzdialfiles, DIALFILE);
  if (iret != UUCONF_SUCCESS)
    return iret;
  iret = itset_default (qglobal, &qglobal->qprocess->pzdialcodefiles,
			DIALCODEFILE);
  if (iret != UUCONF_SUCCESS)
    return iret;
  iret = itset_default (qglobal, &qglobal->qprocess->pzpwdfiles, PASSWDFILE);
  if (iret != UUCONF_SUCCESS)
    return iret;
  iret = itset_default (qglobal, &qglobal->qprocess->pzcallfiles, CALLFILE);
  if (iret != UUCONF_SUCCESS)
    return iret;

  return UUCONF_SUCCESS;
}

/* Local interface to the _uuconf_idebug_cmd function, which handles
   the "debug" command.  */

static int
itdebug (pglobal, argc, argv, pvar, pinfo)
     pointer pglobal;
     int argc;
     char **argv;
     pointer pvar;
     pointer pinfo;
{
  struct sglobal *qglobal = (struct sglobal *) pglobal;
  char **pzdebug = (char **) pvar;

  return _uuconf_idebug_cmd (qglobal, pzdebug, argc, argv,
			     qglobal->pblock);
}

/* Add new filenames to a list of files.  */

/*ARGSUSED*/
static int
itaddfile (pglobal, argc, argv, pvar, pinfo)
     pointer pglobal;
     int argc;
     char **argv;
     pointer pvar;
     pointer pinfo;
{
  struct sglobal *qglobal = (struct sglobal *) pglobal;
  char ***ppz = (char ***) pvar;
  int i;
  int iret;

  if (argc == 1)
    {
      iret = _uuconf_iadd_string (qglobal, NULL, FALSE, FALSE, ppz,
				  qglobal->pblock);
      if (iret != UUCONF_SUCCESS)
	return iret;
    }
  else
    {
      for (i = 1; i < argc; i++)
	{
	  char *z;
	  boolean fallocated;

	  MAKE_ABSOLUTE (z, fallocated, argv[i], NEWCONFIGLIB,
			 qglobal->pblock);
	  if (z == NULL)
	    {
	      qglobal->ierrno = errno;
	      return (UUCONF_MALLOC_FAILED
		      | UUCONF_ERROR_ERRNO
		      | UUCONF_CMDTABRET_EXIT);
	    }
	  iret = _uuconf_iadd_string (qglobal, z, ! fallocated, FALSE, ppz,
				      qglobal->pblock);
	  if (iret != UUCONF_SUCCESS)
	    return iret;
	}
    }

  return UUCONF_CMDTABRET_CONTINUE;
}

/* Handle an "unknown" command.  We accumulate this into a linked
   list, and only parse them later in uuconf_unknown_system_info.  */

/*ARGSUSED*/
static int
itunknown (pglobal, argc, argv, pvar, pinfo)
     pointer pglobal;
     int argc;
     char **argv;
     pointer pvar;
     pointer pinfo;
{
  struct sglobal *qglobal = (struct sglobal *) pglobal;
  struct sunknown **pq = (struct sunknown **) pvar;
  struct sunknown *q;

  q = (struct sunknown *) uuconf_malloc (qglobal->pblock,
					 sizeof (struct sunknown));
  if (q == NULL)
    {
      qglobal->ierrno = errno;
      return (UUCONF_MALLOC_FAILED
	      | UUCONF_ERROR_ERRNO
	      | UUCONF_CMDTABRET_EXIT);
    }
  q->qnext = NULL;
  q->ilineno = qglobal->ilineno;
  q->cargs = argc - 1;
  q->pzargs = (char **) uuconf_malloc (qglobal->pblock,
				       (argc - 1) * sizeof (char *));
  if (q->pzargs == NULL)
    {
      qglobal->ierrno = errno;
      return (UUCONF_MALLOC_FAILED
	      | UUCONF_ERROR_ERRNO
	      | UUCONF_CMDTABRET_EXIT);
    }
  memcpy ((pointer) q->pzargs, (pointer) (argv + 1),
	  (argc - 1) * sizeof (char *));

  while (*pq != NULL)
    pq = &(*pq)->qnext;

  *pq = q;

  return UUCONF_CMDTABRET_KEEP;
}

/* If we encounter an unknown command, see if it is the program with
   which we were invoked.  If it was, pass the remaining arguments
   back through the table.  */

/*ARGSUSED*/
static int
itprogram (pglobal, argc, argv, pvar, pinfo)
     pointer pglobal;
     int argc;
     char **argv;
     pointer pvar;
     pointer pinfo;
{
  struct sglobal *qglobal = (struct sglobal *) pglobal;
  struct sinfo *qinfo = (struct sinfo *) pinfo;

  if (argc <= 1
      || strcasecmp (qinfo->zname, argv[0]) != 0)
    return UUCONF_CMDTABRET_CONTINUE;

  return uuconf_cmd_args (pglobal, argc - 1, argv + 1, qinfo->qcmds,
			  (pointer) NULL, (uuconf_cmdtabfn) NULL, 0,
			  qglobal->pblock);
}

/* If a filename was not set by the configuration file, add in the
   default value.  */

static int
itset_default (qglobal, ppzvar, zfile)
     struct sglobal *qglobal;
     char ***ppzvar;
     const char *zfile;
{
  size_t clen;
  char *zadd;

  if (*ppzvar != NULL)
    return UUCONF_SUCCESS;

  clen = strlen (zfile);
  zadd = (char *) uuconf_malloc (qglobal->pblock,
				 sizeof NEWCONFIGLIB + clen);
  if (zadd == NULL)
    {
      qglobal->ierrno = errno;
      return UUCONF_MALLOC_FAILED | UUCONF_ERROR_ERRNO;
    }

  memcpy ((pointer) zadd, (pointer) NEWCONFIGLIB, sizeof NEWCONFIGLIB - 1);
  memcpy ((pointer) (zadd + sizeof NEWCONFIGLIB - 1), (pointer) zfile,
	  clen + 1);

  return _uuconf_iadd_string (qglobal, zadd, FALSE, FALSE, ppzvar,
			      qglobal->pblock);
}

/* Handle the "debug" command which is documented to take multiple
   arguments.  This is also called by the ``debug'' command in a sys
   file.  It returns a CMDTABRET code.  This should probably be in its
   own file, but the only other place it is called is from tsinfo.c,
   and any user of tsinfo.c it sure to link in this file as well.  */

int
_uuconf_idebug_cmd (qglobal, pzdebug, argc, argv, pblock)
     struct sglobal *qglobal;
     char **pzdebug;
     int argc;
     char **argv;
     pointer pblock;
{
  if (argc == 1)
    {
      *pzdebug = NULL;
      return UUCONF_CMDTABRET_CONTINUE;
    }
  else if (argc == 2)
    {
      *pzdebug = argv[1];
      return UUCONF_CMDTABRET_KEEP;
    }
  else
    {
      size_t cdebug;
      int i;
      char *zdebug;

      cdebug = 0;
      for (i = 1; i < argc; i++)
	cdebug += strlen (argv[i]) + 1;
      zdebug = (char *) uuconf_malloc (pblock, cdebug);
      if (zdebug == NULL)
	{
	  qglobal->ierrno = errno;
	  return (UUCONF_MALLOC_FAILED
		  | UUCONF_ERROR_ERRNO
		  | UUCONF_CMDTABRET_EXIT);
	}
      cdebug = 0;
      for (i = 1; i < argc; i++)
	{
	  size_t clen;

	  clen = strlen (argv[i]);
	  memcpy (zdebug + cdebug, argv[i], clen);
	  zdebug[cdebug + clen] = ' ';
	  cdebug += clen + 1;
	}
      zdebug[cdebug - 1] = '\0';
      *pzdebug = zdebug;
      return UUCONF_CMDTABRET_CONTINUE;
    }
}