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/*
* misc.c
*
* Miscellaneous macro's and functions.
*
* Copyright (C) 2004,2005 Martin Schlemmer <azarah@nosferatu.za.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 version 2 of the License.
*
* 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.,
* 675 Mass Ave, Cambridge, MA 02139, USA.
*
* $Header$
*/
#include <errno.h>
#include <string.h>
#include <stdlib.h>
#include "rcscripts/rcutil.h"
/* This handles simple 'entry="bar"' type variables. If it is more complex
* ('entry="$(pwd)"' or such), it will obviously not work, but current behaviour
* should be fine for the type of variables we want. */
char *
rc_get_cnf_entry (const char *pathname, const char *entry)
{
dyn_buf_t *dynbuf = NULL;
char *buf = NULL;
char *str_ptr;
char *value = NULL;
char *token;
if ((!check_arg_str (pathname)) || (!check_arg_str (entry)))
return NULL;
/* If it is not a file or symlink pointing to a file, bail */
if (1 != rc_is_file (pathname, 1))
{
errno = ENOENT;
DBG_MSG ("Given pathname is not a file or do not exist!\n");
return NULL;
}
dynbuf = new_dyn_buf_mmap_file (pathname);
if (NULL == dynbuf)
{
DBG_MSG ("Could not open config file for reading!\n");
return NULL;
}
while (NULL != (buf = read_line_dyn_buf (dynbuf)))
{
str_ptr = buf;
/* Strip leading spaces/tabs */
while ((str_ptr[0] == ' ') || (str_ptr[0] == '\t'))
str_ptr++;
/* Get entry and value */
token = strsep (&str_ptr, "=");
/* Bogus entry or value */
if (NULL == token)
goto _continue;
/* Make sure we have a string that is larger than 'entry', and
* the first part equals 'entry' */
if ((strlen (token) > 0) && (0 == strcmp (entry, token)))
{
do
{
/* Bash variables are usually quoted */
token = strsep (&str_ptr, "\"\'");
/* If quoted, the first match will be "" */
}
while ((NULL != token) && (0 == strlen (token)));
/* We have a 'entry='. We respect bash rules, so NULL
* value for now (if not already) */
if (NULL == token)
{
/* We might have 'entry=' and later 'entry="bar"',
* so just continue for now ... we will handle
* it below when 'value == NULL' */
if (NULL != value)
{
free (value);
value = NULL;
}
goto _continue;
}
/* If we have already allocated 'value', free it */
if (NULL != value)
free (value);
value = xstrndup (token, strlen (token));
if (NULL == value)
{
free_dyn_buf (dynbuf);
free (buf);
return NULL;
}
/* We do not break, as there might be more than one entry
* defined, and as bash uses the last, so should we */
/* break; */
}
_continue:
free (buf);
}
/* read_line_dyn_buf() returned NULL with errno set */
if ((NULL == buf) && (0 != errno))
{
DBG_MSG ("Failed to read line from dynamic buffer!\n");
free_dyn_buf (dynbuf);
if (NULL != value)
free (value);
return NULL;
}
if (NULL == value)
DBG_MSG ("Failed to get value for config entry '%s'!\n", entry);
free_dyn_buf (dynbuf);
return value;
}
char **
rc_get_list_file (char **list, char *filename)
{
dyn_buf_t *dynbuf = NULL;
char *buf = NULL;
char *tmp_p = NULL;
char *token = NULL;
if (!check_arg_str (filename))
return NULL;
dynbuf = new_dyn_buf_mmap_file (filename);
if (NULL == dynbuf)
return NULL;
while (NULL != (buf = read_line_dyn_buf (dynbuf)))
{
tmp_p = buf;
/* Strip leading spaces/tabs */
while ((tmp_p[0] == ' ') || (tmp_p[0] == '\t'))
tmp_p++;
/* Get entry - we do not want comments, and only the first word
* on a line is valid */
token = strsep (&tmp_p, "# \t");
if (check_str (token))
{
tmp_p = xstrndup (token, strlen (token));
if (NULL == tmp_p)
{
if (NULL != list)
str_list_free (list);
free_dyn_buf (dynbuf);
free (buf);
return NULL;
}
str_list_add_item (list, tmp_p, error);
}
free (buf);
}
/* read_line_dyn_buf() returned NULL with errno set */
if ((NULL == buf) && (0 != errno))
{
DBG_MSG ("Failed to read line from dynamic buffer!\n");
error:
if (NULL != list)
str_list_free (list);
free_dyn_buf (dynbuf);
return NULL;
}
free_dyn_buf (dynbuf);
return list;
}
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