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#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <err.h>
#include <unistd.h>
static char* conf_directory = NULL;
static char* work_directory = NULL;
typedef struct _graph
{
const char* name;
char* title;
int width;
int height;
int interval;
char* category;
struct _graph *next;
}
graph;
static graph* allgraphs = NULL;
/* -----------------------------------------------------------------------------
* CONFIG PARSING
*/
int cfg_value(const char* filename, const char* header, const char* name,
char* value, void* data)
{
static graph* gr = NULL;
/* called like this after ever file */
if (!header)
{
/* add to the list */
gr->next = allgraphs;
allgraphs = gr;
gr = NULL;
return 0;
}
if (gr == NULL)
{
gr = calloc(1, sizeof(graph));
if (!gr)
err(1, "Out of memory");
gr->name = filename;
gr->category = "";
}
if (strcmp(header, "general") == 0)
{
if (strcmp(name, "title") == 0)
gr->title = value;
else if (strcmp(name, "category") == 0)
gr->category = value;
}
else if (strcmp(header, "graph") == 0)
{
if (strcmp(name, "height") == 0)
gr->height = atoi(value);
else if (strcmp(name, "width") == 0)
gr->width = atoi(value);
}
else if (strcmp(header, "poll") == 0)
{
if (strcmp(name, "interval") == 0)
gr->interval = atoi(value);
}
}
int cfg_error(const char* filename, const char* errmsg, void* data)
{
/* todo skip the rest of this file on error */
warnx("%s", errmsg);
return 0;
}
void
freegraphs ()
{
graph* l;
graph* t;
for (l = allgraphs; l != NULL; )
{
t = l->next;
free(l);
l = t;
}
}
/* -----------------------------------------------------------------------------
* METHODS
*/
static void
listgraphs ()
{
graph* l;
printf("Content-Type: text/xml\n\n");
printf("<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n");
printf("<data>\n");
for (l = allgraphs; l != NULL; l = l->next)
{
printf(" <graph name=\"%s\" category=\"%s\" title=\"%s\"", \
l->name, l->category, l->title);
if (l->width)
printf(" width=\"%d\"", l->width);
if (l->height)
printf(" height=\"%d\"", l->height);
if (l->interval)
printf(" interval=\"%d\"", l->interval);
printf(" />\n");
}
printf("</data>\n");
}
#if 0
static void
displaygraphs ()
{
char* name = NULL;
int width;
int height;
char* q;
char* query = NULL;
q = getenv("QUERY_STRING");
if (q)
{
query = q = strdup(q);
while (q[0] && (q[0] == '?' || isspace(q[0])))
q++;
while (q && q[0])
{
nm = strsep(&q, "&");
vl = strchr(nm, '=');
if (!vl)
continue;
vl[0] = 0;
vl++;
if (strcmp(nm, "name") == 0)
name = vl;
else if (strcmp(nm, "width") == 0)
width = atoi(vl);
else if (strcmp(nm, "height") == )
height = atoi(vl);
}
}
}
#endif
/* -----------------------------------------------------------------------------
* MAIN
*/
static void
usererror (const char* msg)
{
printf("Content-Type: text/plain\n\n");
printf("%s\n", msg);
/* Custom error so webserver doesn't think it's a server error */
exit(0);
}
static int
pathstarts (const char* path, const char* method)
{
int len = strlen(method);
if (strncmp(path, method, len) != 0)
return 0;
if (path[len] == '/' || !path[len])
return 1;
return 0;
}
int
main (int argc, char* argv[])
{
char* path;
conf_directory = getenv("CONFDIR");
work_directory = getenv("WORKDIR");
if (!conf_directory || !work_directory)
errx(2, "not setup properly. CONFDIR and WORKDIR env variables must be set");
/*
* We always have this as our current directory.
* It helps when constructing graphs and the like
*/
if (chdir(work_directory) < 0)
err(1, "Couldn't change to work directory: %s", work_directory);
path = getenv("PATH_INFO");
while (path && path[0] &&
(isspace(path[0]) || path[0] == '/'))
path++;
cfg_parse_dir(conf_directory, NULL);
if (!path || !path[0] || pathstarts(path, "list"))
listgraphs();
else if (pathstarts(path, "graph"))
printf("graph\n");
else
usererror("Invalid request");
freegraphs();
return 0;
}
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