osd-contiki/apps/time/resource_crontab.c

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2016-02-26 17:30:16 +01:00
/**
* \file
* Resource for crontab entry
* \author
* Ralf Schlatterbeck <rsc@runtux.com>
*
* \brief get/put crontab entry
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "contiki.h"
#include "time_resource.h"
#include "jsonparse.h"
#include "er-coap.h"
#include "generic_resource.h"
#include "cron.h"
static size_t get_index_from_uri (const char *uri)
{
const char *s;
char *endptr;
size_t idx;
if (uri == NULL) {
return MAX_CRON_ENTRIES;
}
if (NULL == (s = strrchr (uri, '/'))) {
return MAX_CRON_ENTRIES;
}
idx = strtoul (s+1, &endptr, 10);
if (s == endptr || *endptr != '\0') {
return MAX_CRON_ENTRIES;
}
return idx;
}
int crontab_from_string (const char *name, const char *uri, const char *s)
{
const char *err;
int res;
size_t idx = get_index_from_uri (uri);
if (idx >= MAX_CRON_ENTRIES) {
return -1;
}
res = parse_crontab_line (s, get_cron_entry (idx), &err);
if (res < 0) {
printf ("Error parsing: %s\n", err);
return -1;
}
return 0;
}
size_t
crontab_to_string (const char *name, const char *uri, char *buf, size_t bsize)
{
/* FIXME: For now we only return "valid" or "invalid" until someone
* comes up with a clever algorithm to reconstruct a crontab string
* from the cron_entry struct.
*/
size_t idx = get_index_from_uri (uri);
struct cron_entry *e;
if (idx >= MAX_CRON_ENTRIES) {
return MAX_GET_STRING_LENGTH;
}
e = get_cron_entry (idx);
if (e->flags & VALID) {
return snprintf (buf, bsize, "valid");
}
return snprintf (buf, bsize, "invalid");
}
GENERIC_RESOURCE
( crontab
, crontab-entry
, s
, 1
, crontab_from_string
, crontab_to_string
);
/* Allocate all cron entries and the necessary resources */
void activate_cron_resources (void)
{
size_t n;
for (n=0; n<MAX_CRON_ENTRIES; n++) {
resource_t *res;
char *buf;
size_t len;
struct cron_entry *e;
char name [15];
/* Need to copy the resource because resource->url holds the path
* under which we activate it using rest_activate_resource
*/
if (NULL == (res = malloc (sizeof (*res)))) {
printf ("Error malloc\n");
break;
}
memcpy (res, &res_crontab, sizeof (*res));
e = allocate_cron_entry ();
assert (!(e->flags & VALID));
len = snprintf (name, sizeof (name), "crontab/%u", n);
name [sizeof (name) -1] = '\0';
assert (len < 15);
if (NULL == (buf = malloc (len + 1))) {
printf ("Error malloc\n");
break;
}
strcpy (buf, name);
rest_activate_resource (res, buf);
}
}
/*
* VI settings, see coding style
* ex:ts=8:et:sw=2
*/