static struct icaltimetype
get_last_modified (icalcomponent *component)
{
icalcomponent *inner = icalcomponent_get_inner (component);
icalproperty *prop;
prop = icalcomponent_get_first_property (inner, ICAL_LASTMODIFIED_PROPERTY);
if (prop == 0) {
return icaltime_null_time ();
}
return icalproperty_get_lastmodified (prop);
}
/* Add all ZONEs and LINKs in the given directory to the hash table */
void do_zonedir(const char *dir, struct hash_table *tzentries,
struct zoneinfo *info)
{
DIR *dirp;
struct dirent *dirent;
signals_poll();
if (verbose) printf("Rebuilding %s\n", dir);
dirp = opendir(dir);
if (!dirp) {
fprintf(stderr, "can't open zoneinfo directory %s\n", dir);
}
while ((dirent = readdir(dirp))) {
char path[2048], *tzid;
int plen;
struct stat sbuf;
struct zoneinfo *zi;
if (*dirent->d_name == '.') continue;
plen = snprintf(path, sizeof(path), "%s/%s", dir, dirent->d_name);
lstat(path, &sbuf);
if (S_ISDIR(sbuf.st_mode)) {
/* Path is a directory (region) */
do_zonedir(path, tzentries, info);
}
else if (S_ISLNK(sbuf.st_mode)) {
/* Path is a symlink (alias) */
char link[1024], *alias;
ssize_t llen;
/* Isolate tzid in path */
if ((llen = readlink(path, link, sizeof(link))) < 0) continue;
link[llen-4] = '\0'; /* Trim ".ics" */
for (tzid = link; !strncmp(tzid, "../", 3); tzid += 3);
/* Isolate alias in path */
path[plen-4] = '\0'; /* Trim ".ics" */
alias = path + strlen(config_dir) + strlen("zoneinfo") + 2;
if (verbose) printf("\tLINK: %s -> %s\n", alias, tzid);
/* Create hash entry for alias */
if (!(zi = hash_lookup(alias, tzentries))) {
zi = xzmalloc(sizeof(struct zoneinfo));
hash_insert(alias, zi, tzentries);
}
zi->type = ZI_LINK;
appendstrlist(&zi->data, tzid);
/* Create/update hash entry for tzid */
if (!(zi = hash_lookup(tzid, tzentries))) {
zi = xzmalloc(sizeof(struct zoneinfo));
hash_insert(tzid, zi, tzentries);
}
zi->type = ZI_ZONE;
appendstrlist(&zi->data, alias);
}
else if (S_ISREG(sbuf.st_mode)) {
/* Path is a regular file (zone) */
int fd;
const char *base = NULL;
size_t len = 0;
icalcomponent *ical, *comp;
icalproperty *prop;
/* Parse the iCalendar file for important properties */
if ((fd = open(path, O_RDONLY)) == -1) continue;
map_refresh(fd, 1, &base, &len, MAP_UNKNOWN_LEN, path, NULL);
close(fd);
ical = icalparser_parse_string(base);
map_free(&base, &len);
if (!ical) continue; /* skip non-iCalendar files */
comp = icalcomponent_get_first_component(ical,
ICAL_VTIMEZONE_COMPONENT);
prop = icalcomponent_get_first_property(comp, ICAL_TZID_PROPERTY);
tzid = (char *) icalproperty_get_value_as_string(prop);
if (verbose) printf("\tZONE: %s\n", tzid);
/* Create/update hash entry for tzid */
if (!(zi = hash_lookup(tzid, tzentries))) {
zi = xzmalloc(sizeof(struct zoneinfo));
hash_insert(tzid, zi, tzentries);
}
zi->type = ZI_ZONE;
prop = icalcomponent_get_first_property(comp,
ICAL_LASTMODIFIED_PROPERTY);
zi->dtstamp = icaltime_as_timet(icalproperty_get_lastmodified(prop));
icalcomponent_free(ical);
/* Check overall lastmod */
if (zi->dtstamp > info->dtstamp) info->dtstamp = zi->dtstamp;
}
else {
fprintf(stderr, "unknown path type %s\n", path);
}
}
closedir(dirp);
}
