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/*******************************************************************************
* libproxy - A library for proxy configuration
* Copyright (C) 2006 Nathaniel McCallum <nathaniel@natemccallum.com>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
******************************************************************************/
#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>
#include <fcntl.h>
#include <string.h>
#include "misc.h"
#include "config_file.h"
struct _pxConfigFileSection {
char *name;
char **keys;
char **vals;
};
typedef struct _pxConfigFileSection pxConfigFileSection;
struct _pxConfigFile {
char *filename;
time_t mtime;
pxConfigFileSection **sections;
};
pxConfigFile *
px_config_file_new(char *filename)
{
// Open the file and stat it
struct stat st;
int fd = open(filename, O_RDONLY);
if (fd < 0) return NULL;
fstat(fd, &st);
// Allocate our structure; get mtime and filename
pxConfigFile *self = px_malloc0(sizeof(pxConfigFile));
self->mtime = st.st_mtime;
self->filename = px_strdup(filename);
// Add one section (PX_CONFIG_FILE_DEFAULT_SECTION)
self->sections = px_malloc0(sizeof(pxConfigFileSection *) * 2);
self->sections[0] = px_malloc0(sizeof(pxConfigFileSection));
self->sections[0]->name = px_strdup(PX_CONFIG_FILE_DEFAULT_SECTION);
pxConfigFileSection *current = self->sections[0];
// Parse our file
for (char *line=NULL ; (line = px_readline(fd)) ; px_free(line))
{
// Strip
char *tmp = px_strstrip(line);
px_free(line); line = tmp;
// Check for comment and/or empty line
if (*line == '#' || !strcmp(line, "")) continue;
// If we have a new section
if (*line == '[' || line[strlen(line)-1] == ']')
{
// Get just the section name
memmove(line, line+1, strlen(line)-1);
line[strlen(line)-2] = '\0';
// Check for each section...
for (int i=0 ; self->sections[i] ; i++)
{
// If we found the section already, set it as current and move on
if (!strcmp(self->sections[i]->name, line))
{
current = self->sections[i];
break;
}
// If the section wasn't found, add a new section
if (!self->sections[i+1])
{
// Create new section
current = px_malloc0(sizeof(pxConfigFileSection));
current->name = px_strdup(line);
// Add section to the end
pxConfigFileSection **sections = self->sections;
self->sections = px_malloc0(sizeof(pxConfigFileSection *) * (i+3));
memcpy(self->sections, sections, sizeof(pxConfigFileSection) * (i+1));
self->sections[i+1] = current;
px_free(sections);
break;
}
}
continue;
}
// If this is a key/val line, get the key/val.
if ((tmp = strchr(line, '=')) && tmp[1])
{
// If this is our first key/val, create a new array
if (!current->keys || !current->vals)
{
// Add key
current->keys = px_malloc0(sizeof(char *) * 2);
current->keys[0] = px_strndup(line, tmp - line);
current->keys[1] = NULL;
// Add val
current->vals = px_malloc0(sizeof(char *) * 2);
current->vals[0] = px_strdup(tmp+1);
current->vals[1] = NULL;
}
// If this is not our first key/val, tack it on the end
else
{
for (int i=0 ; current->keys[i] ; i++)
{
if (!current->keys[i+1])
{
// Add val
char **vals = px_malloc0(sizeof(char *) * (i+3));
memcpy(vals, current->vals, sizeof(char *) * (i+1));
vals[i+1] = px_strstrip(tmp+1);
px_free(current->vals); current->vals = vals;
// Add key
*tmp = '\0';
char **keys = px_malloc0(sizeof(char *) * (i+3));
memcpy(keys, current->keys, sizeof(char *) * (i+1));
keys[i+1] = px_strstrip(line);
px_free(current->keys); current->keys = keys;
break;
}
}
}
continue;
}
}
close(fd);
return self;
}
bool
px_config_file_is_stale(pxConfigFile *self)
{
struct stat st;
return (!stat(self->filename, &st) && st.st_mtime > self->mtime);
}
char **
px_config_file_get_sections(pxConfigFile *self)
{
int count;
for (count=0 ; self->sections[count] ; count++);
char **output = px_malloc0(sizeof(char *) * ++count);
for (count=0 ; self->sections[count] ; count++)
output[count] = px_strdup(self->sections[count]->name);
return output;
}
char **
px_config_file_get_keys(pxConfigFile *self, char *section)
{
for (int i=0 ; self->sections[i] ; i++)
{
if (!strcmp(self->sections[i]->name, section))
return px_strdupv((const char **) self->sections[i]->keys);
}
return NULL;
}
char *
px_config_file_get_value(pxConfigFile *self, char *section, char *key)
{
for (int i=0 ; self->sections[i] ; i++)
if (!strcmp(self->sections[i]->name, section))
for (int j=0 ; self->sections[i]->keys && self->sections[i]->keys[j] ; j++)
if (!strcmp(self->sections[i]->keys[j], key))
return px_strdup(self->sections[i]->vals[j]);
return NULL;
}
void
px_config_file_free(pxConfigFile *self)
{
if (!self) return;
for (int i=0 ; self->sections && self->sections[i] ; i++)
{
px_free(self->sections[i]->name);
px_strfreev(self->sections[i]->keys);
px_strfreev(self->sections[i]->vals);
px_free(self->sections[i]);
}
px_free(self->sections);
px_free(self->filename);
px_free(self);
}
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