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upsconf.c

/* upsconf.c - code for handling ups.conf ini-style parsing

   Copyright (C) 2001  Russell Kroll <rkroll@exploits.org>

   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
*/

#include <stdio.h>
#include <unistd.h>
#include <stdlib.h>
#include <string.h>

#include "upsconf.h"
#include "common.h"
#include "parseconf.h"

      static      char  *ups_section;

/* handle arguments separated by parseconf */
static void conf_args(int numargs, char **arg)
{
      char  *ep;

      if (numargs < 1)
            return;

      /* look for section headers - [upsname] */
      if ((arg[0][0] == '[') && (arg[0][strlen(arg[0])-1] == ']')) {
            
            free(ups_section);

            arg[0][strlen(arg[0])-1] = '\0';
            ups_section = xstrdup(&arg[0][1]);
            return;
      }

      /* handle 'foo=bar' (compressed form) */
      ep = strchr(arg[0], '=');
      if (ep) {
            *ep = '\0';

            do_upsconf_args(ups_section, arg[0], ep+1);
            return;
      }

      /* handle 'foo' (flag) */
      if (numargs == 1) {
            do_upsconf_args(ups_section, arg[0], NULL);
            return;
      }

      if (numargs < 3)
            return;

      /* handle 'foo = bar' (split form) */
      if (!strcmp(arg[1], "=")) {
            do_upsconf_args(ups_section, arg[0], arg[2]);
            return;
      }
}

/* called for fatal errors in parseconf like malloc failures */
static void upsconf_err(const char *errmsg)
{
      upslogx(LOG_ERR, "Fatal error in parseconf(ups.conf): %s", errmsg);
}

/* open the ups.conf, parse it, and call back do_upsconf_args() */
void read_upsconf(void)
{
      char  fn[SMALLBUF];
      PCONF_CTX_t ctx;

      ups_section = NULL;
      snprintf(fn, sizeof(fn), "%s/ups.conf", confpath());

      pconf_init(&ctx, upsconf_err);

      if (!pconf_file_begin(&ctx, fn))
            fatalx(EXIT_FAILURE, "Can't open %s: %s", fn, ctx.errmsg);

      while (pconf_file_next(&ctx)) {
            if (pconf_parse_error(&ctx)) {
                  upslogx(LOG_ERR, "Parse error: %s:%d: %s",
                        fn, ctx.linenum, ctx.errmsg);
                  continue;
            }

            conf_args(ctx.numargs, ctx.arglist);
      }

      pconf_finish(&ctx);

      free(ups_section);
}

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