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lsyncd
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Finally HUP-able

This commit is contained in:
Axel Kittenberger 2010-08-04 20:22:38 +00:00
parent e3f7401be4
commit c2354ede16
1 changed files with 86 additions and 31 deletions
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117
lsyncd.c
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@ -386,8 +386,10 @@ struct delay_vector {
* It's not worth to code a dynamic size handling...
*/
#define MAX_EXCLUDES 256
char * exclude_dirs[MAX_EXCLUDES] = {NULL, };
int exclude_dir_n = 0;
struct exclude_vector {
char * data[MAX_EXCLUDES];
size_t len;
};
/*--------------------------------------------------------------------------*
* MEMCHECK
@ -435,17 +437,30 @@ void maction(const void *nodep, const VISIT which, const int depth) {
*--------------------------------------------------------------------------*/
/**
* Set to 0 in signal handler, when lsyncd should TERMinate nicely.
* Set to 0 in signal handler, when lsyncd should end ASAP.
* This can be either a TERM or a HUP signal.
* In case of HUP killed is 0 and start over.
*/
volatile sig_atomic_t keep_going = 1;
/**
* Received a TERM signal, TERMinate nicely.
*/
volatile sig_atomic_t termed = 0;
/**
* Called (out-of-order) when signals arrive
*/
void
catch_alarm(int sig)
{
keep_going = 0;
switch(sig) {
case SIGTERM :
termed = 1;
/* fall through */
case SIGHUP :
keep_going = 0;
}
}
/**
@ -941,7 +956,7 @@ append_delay(const struct log *log,
struct watch *watch,
clock_t alarm)
{
printlogf(log, DEBUG, "append delay(%s, %d)", watch->dirname, alarm);
printlogf(log, DEBUG, "append_delay(%s, %d)", watch->dirname, alarm);
if (watch->delayed) {
printlogf(log, DEBUG, "ignored since already delayed.");
return false;
@ -1401,6 +1416,7 @@ delay_or_act_dir(const struct global_options *opts,
* @param opts global options
* @param watches the watch vector
* @param delays the delay vector
* @param excludes the excludes vector
* @param inotify_fd inotify file descriptor.
* @param dirname The name or absolute path of the directory to watch.
* @param parent If not NULL, the watches to the parent directory already watched.
@ -1413,6 +1429,7 @@ struct watch *
add_dirwatch(const struct global_options *opts,
struct watch_vector *watches,
struct delay_vector *delays,
struct exclude_vector *excludes,
int inotify_fd,
char const *dirname,
struct watch *parent,
@ -1433,12 +1450,12 @@ add_dirwatch(const struct global_options *opts,
{
int i;
for (i = 0; i < exclude_dir_n; i++) {
if (!strcmp(pathname, exclude_dirs[i])) {
for (i = 0; i < excludes->len; i++) {
if (!strcmp(pathname, excludes->data[i])) {
printlogf(log, NORMAL, "Excluded %s", pathname);
return NULL;
}
printlogf(log, DEBUG, "comparing %s with %s not an exclude so far.", pathname, exclude_dirs[i]);
printlogf(log, DEBUG, "comparing %s with %s not an exclude so far.", pathname, excludes->data[i]);
}
}
@ -1488,7 +1505,7 @@ add_dirwatch(const struct global_options *opts,
// add watches if its a directory and not . or ..
if (isdir && strcmp(de->d_name, "..") && strcmp(de->d_name, ".")) {
// recurse into subdirectories
struct watch *nw = add_dirwatch(opts, watches, delays, inotify_fd, de->d_name, w, dir_conf);
struct watch *nw = add_dirwatch(opts, watches, delays, excludes, inotify_fd, de->d_name, w, dir_conf);
printlogf(log, NORMAL,
"found new directory: %s in %s -- %s",
de->d_name, dirname, nw ? "will be synced" : "ignored it");
@ -1614,6 +1631,7 @@ bool
handle_event(const struct global_options *opts,
struct watch_vector *watches,
struct delay_vector *delays,
struct exclude_vector *excludes,
int inotify_fd,
struct inotify_event *event,
clock_t alarm)
@ -1649,8 +1667,8 @@ handle_event(const struct global_options *opts,
{
// TODO, is this needed? or will it be excluded already?
int i;
for (i = 0; i < exclude_dir_n; i++) {
if (!strcmp(event->name, exclude_dirs[i])) {
for (i = 0; i < excludes->len; i++) {
if (!strcmp(event->name, excludes->data[i])) {
return true;
}
}
@ -1668,7 +1686,7 @@ handle_event(const struct global_options *opts,
if ((IN_ATTRIB | IN_CREATE | IN_CLOSE_WRITE | IN_DELETE |
IN_MOVED_TO | IN_MOVED_FROM) & event->mask
) {
printlogf(log, NORMAL, "received event %s:%s.", masktext, event->name);
printlogf(log, NORMAL, "received event %s:%s for %d.", masktext, event->name, alarm);
delay_or_act_dir(opts, delays, opts->delay > 0, watch, alarm);
} else {
printlogf(log, DEBUG, "... ignored this event.");
@ -1676,7 +1694,7 @@ handle_event(const struct global_options *opts,
// in case of a new directory create new watches of the subdir
if (((IN_CREATE | IN_MOVED_TO) & event->mask) && (IN_ISDIR & event->mask)) {
add_dirwatch(opts, watches, delays, inotify_fd, event->name, watch, watch->dir_conf);
add_dirwatch(opts, watches, delays, excludes, inotify_fd, event->name, watch, watch->dir_conf);
}
// in case of a removed directory remove watches from the subdir
@ -1693,12 +1711,14 @@ handle_event(const struct global_options *opts,
* @param opts global options
* @param watches the watch vector
* @param delays the delay vector
* @param excludes the exclude vector
* @param inotify_fd inotify file descriptor
*/
bool
master_loop(const struct global_options *opts,
struct watch_vector *watches,
struct delay_vector *delays,
struct exclude_vector *excludes,
int inotify_fd)
{
char buf[INOTIFY_BUF_LEN];
@ -1780,7 +1800,7 @@ master_loop(const struct global_options *opts,
int i = 0;
while (i < len) {
struct inotify_event *event = (struct inotify_event *) &buf[i];
handle_event(opts, watches, delays, inotify_fd, event, alarm);
handle_event(opts, watches, delays, excludes, inotify_fd, event, alarm);
i += sizeof(struct inotify_event) + event->len;
}
}
@ -1789,8 +1809,8 @@ master_loop(const struct global_options *opts,
// until one item is found whose expiry time has not yet come
// or the stack is empty. Using now time - times(NULL) - everytime
// again as time may progresses while handling delayed entries.
while (delays->len > 0 && time_after_eq(times(NULL), delays->data[0])) {
printlogf(log, DEBUG, "time for '%s' arrived.", delays->data[0]->dirname);
while (delays->len > 0 && time_after_eq(times(NULL), delays->data[0]->alarm)) {
printlogf(log, DEBUG, "time %d for '%s' arrived. now=%d", delays->data[0]->alarm, delays->data[0]->dirname, times(NULL));
rsync_dir(opts, delays->data[0]);
remove_first_delay(delays);
}
@ -2361,9 +2381,13 @@ parse_options(struct global_options *opts, int argc, char **argv)
/**
* Parses the exclude file looking for directory masks to not watch.
*
*
*/
bool
parse_exclude_file(struct log *log, char *filename) {
parse_exclude_file(struct log *log,
struct exclude_vector * excludes,
char *filename) {
FILE * ef;
char line[PATH_MAX+1];
int sl;
@ -2402,7 +2426,7 @@ parse_exclude_file(struct log *log, char *filename) {
}
if (line[sl - 1] == '/') {
if (exclude_dir_n + 1 >= MAX_EXCLUDES) {
if (excludes->len + 1 >= MAX_EXCLUDES) {
printlogf(log, ERROR,
"Too many directory excludes, can only have %d at the most",
MAX_EXCLUDES);
@ -2419,9 +2443,9 @@ parse_exclude_file(struct log *log, char *filename) {
printlogf(log, NORMAL, "Excluding directories of the name '%s'", line);
exclude_dirs[exclude_dir_n] = s_malloc(log, strlen(line) + 1, "exclude_dir");
strcpy(exclude_dirs[exclude_dir_n], line);
exclude_dir_n++;
excludes->data[excludes->len] = s_malloc(log, strlen(line) + 1, "exclude_dir");
strcpy(excludes->data[excludes->len], line);
excludes->len++;
}
}
@ -2444,16 +2468,18 @@ write_pidfile(const struct log *log, const char *pidfile) {
}
/**
* Main.
* Main for one run.
* Can be runned through several times on HUPs.
*/
int
main(int argc, char **argv)
one_main(int argc, char **argv)
{
struct global_options opts = {{0,}}; // global options
struct log *log = &opts.log; // shortcut to logging options.
struct watch_vector watches = {0, }; // all watches
struct delay_vector delays = {0, }; // delayed entries
int inotify_fd; // inotify file descriptor
struct global_options opts = {{0,}}; // global options
struct log *log = &opts.log; // shortcut to logging options.
struct watch_vector watches = {0, }; // all watches
struct delay_vector delays = {0, }; // delayed entries
struct exclude_vector excludes = {{0, }}; // excludes
int inotify_fd; // inotify file descriptor
openlog("lsyncd", LOG_CONS | LOG_PID, LOG_DAEMON);
@ -2461,7 +2487,7 @@ main(int argc, char **argv)
parse_options(&opts, argc, argv);
if (opts.default_exclude_file) {
parse_exclude_file(log, opts.default_exclude_file);
parse_exclude_file(log, &excludes, opts.default_exclude_file);
}
inotify_fd = inotify_init();
@ -2499,7 +2525,7 @@ main(int argc, char **argv)
int i;
for (i = 0; i < opts.dir_conf_n; i++) {
printlogf(log, NORMAL, "watching %s", opts.dir_confs[i].source);
add_dirwatch(&opts, &watches, &delays, inotify_fd,
add_dirwatch(&opts, &watches, &delays, &excludes, inotify_fd,
opts.dir_confs[i].source, NULL, &opts.dir_confs[i]);
}
}
@ -2542,9 +2568,13 @@ main(int argc, char **argv)
watches.len);
signal(SIGTERM, catch_alarm);
signal(SIGHUP, catch_alarm);
master_loop(&opts, &watches, &delays, inotify_fd);
master_loop(&opts, &watches, &delays, &excludes, inotify_fd);
if (!termed) {
printlogf(log, NORMAL, "--- Received HUP-Signal, cleaning up and starting over ---");
}
{
// memory clean up
int i;
@ -2557,6 +2587,9 @@ main(int argc, char **argv)
}
s_free(watches.data);
s_free(delays.data);
for(i = 0; i < excludes.len; i++) {
s_free(excludes.data[i]);
}
}
@ -2568,3 +2601,25 @@ main(int argc, char **argv)
return 0;
}
/**
* Main wrapper
*
* Start actual main over and over on HUPs.
*/
int
main(int argc, char **argv)
{
int ret;
do {
ret = one_main(argc, argv);
if (ret) {
return ret;
}
// start over
keep_going = 1;
} while (!termed);
return ret;
}