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#include <stdio.h>
#include <ctype.h>
#include <string.h>
#include <stdlib.h>
#include <stdbool.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <fcntl.h>
#include <glob.h>
#include <unistd.h>
#define _IS_CONFIG_C
#include "config.h"
#undef _IS_CONFIG_C
const char *wlan_interface;
const char *eth_interface;
const char *wmii_path;
const char *time_format;
const char *battery_path;
bool use_colors;
const char *wmii_normcolors;
char order[MAX_ORDER][2];
const char **run_watches;
unsigned int num_run_watches;
void die(const char *fmt, ...);
/*
* This function exists primarily for resolving ~ in pathnames. However, you
* can also specify ~/Movies/ *, which will only return the first match!
*
*/
char *glob_path(const char *path) {
static glob_t globbuf;
if (glob(path, GLOB_NOCHECK | GLOB_TILDE, NULL, &globbuf) < 0)
die("glob() failed");
char *result = strdup(globbuf.gl_pathc > 0 ? globbuf.gl_pathv[0] : path);
globfree(&globbuf);
return result;
}
/*
* Loads configuration from configfile
*
*/
static void get_next_config_entry(FILE *handle, char **dest_name, char **dest_value, char *whole_buffer, int whole_buffer_size) {
char *ret;
if ((ret = fgets(whole_buffer, whole_buffer_size, handle)) == whole_buffer) {
char *c = whole_buffer;
/* Skip whitespaces in the beginning */
while (isspace((int)*c) && *c != '\0')
c++;
*dest_name = c;
while (!isspace((int)*c))
c++;
/* Terminate string as soon as whitespaces begin or it's terminated anyway */
*(c++) = '\0';
/* Same for the value: strip whitespaces */
while (isspace((int)*c) && *c != '\0')
c++;
*dest_value = c;
/* Whitespace is allowed, newline/carriage return is not */
while ((*c != '\n') && (*c != '\r') && (*c != '\0'))
c++;
*c = 0;
} else if (ret != NULL)
die("Could not read line in configuration file");
}
/*
* Reads the configuration from the given file
*
*/
int load_configuration(const char *configfile) {
#define OPT(x) else if (strcasecmp(dest_name, x) == 0)
/* Check if the file exists */
struct stat buf;
if (stat(configfile, &buf) < 0)
return -1;
int result = 0;
FILE *handle = fopen(configfile, "r");
if (handle == NULL)
die("Could not open configfile");
char *dest_name = NULL, *dest_value = NULL, whole_buffer[1026];
struct stat stbuf;
while (!feof(handle)) {
get_next_config_entry(handle, &dest_name, &dest_value, whole_buffer, 1024);
/* No more entries? We're done! */
if (dest_name == NULL)
break;
/* Skip comments and empty lines */
if (dest_name[0] == '#' || strlen(dest_name) < 3)
continue;
OPT("wlan")
{
wlan_interface = strdup(dest_value);
}
OPT("eth")
{
eth_interface = strdup(dest_value);
}
OPT("wmii_path")
{
char *globbed = glob_path(dest_value);
if ((stat(globbed, &stbuf)) == -1)
die("wmii_path contains an invalid path");
if (globbed[strlen(globbed)-1] != '/')
die("wmii_path is not terminated by /");
wmii_path = globbed;
}
OPT("time_format")
{
time_format = strdup(dest_value);
}
OPT("battery_path")
{
if ((stat(dest_value, &stbuf)) == -1)
die("battery_path contains an invalid path");
battery_path = strdup(dest_value);
}
OPT("run_watch")
{
char *name = strdup(dest_value);
char *path = name;
while (*path != ' ')
path++;
*(path++) = '\0';
num_run_watches += 2;
run_watches = realloc(run_watches, sizeof(char*) * num_run_watches);
run_watches[num_run_watches-2] = name;
run_watches[num_run_watches-1] = path;
}
OPT("order")
{
#define SET_ORDER(opt, idx) { if (strcasecmp(token, opt) == 0) sprintf(order[idx], "%d", c++); }
char *walk, *token;
int c = 0;
walk = token = dest_value;
while (*walk != '\0') {
while ((*walk != ',') && (*walk != '\0'))
walk++;
*(walk++) = '\0';
SET_ORDER("run", ORDER_RUN);
SET_ORDER("wlan", ORDER_WLAN);
SET_ORDER("eth", ORDER_ETH);
SET_ORDER("battery", ORDER_BATTERY);
SET_ORDER("load", ORDER_LOAD);
SET_ORDER("time", ORDER_TIME);
token = walk;
}
}
OPT("color")
{
use_colors = true;
}
OPT("normcolors")
{
wmii_normcolors = strdup(dest_value);
}
else
{
result = -2;
die("Unknown configfile option: %s\n", dest_name);
}
dest_name = dest_value = NULL;
}
fclose(handle);
if (wmii_path == NULL)
die("No wmii_path specified in configuration file");
return result;
}
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