int main(int argc, char ** argv)
{
events = 0;
unsigned long int timeout = 0;
int verbose = 0;
zero = 0;
int recursive = 0;
char * fromfile = 0;
sort = -1;
done = false;
char * exc_regex = NULL;
char * exc_iregex = NULL;
char * inc_regex = NULL;
char * inc_iregex = NULL;
signal( SIGINT, handle_impatient_user );
// Parse commandline options, aborting if something goes wrong
if ( !parse_opts( &argc, &argv, &events, &timeout, &verbose, &zero, &sort,
&recursive, &fromfile, &exc_regex, &exc_iregex,
&inc_regex, &inc_iregex ) ) {
return EXIT_FAILURE;
}
if (
(exc_regex && !inotifytools_ignore_events_by_regex(exc_regex, REG_EXTENDED) ) ||
(exc_iregex && !inotifytools_ignore_events_by_regex(exc_iregex, REG_EXTENDED|
REG_ICASE))
) {
fprintf(stderr, "Error in `exclude' regular expression.\n");
return EXIT_FAILURE;
}
if (
(inc_regex && !inotifytools_ignore_events_by_inverted_regex(inc_regex, REG_EXTENDED) ) ||
(inc_iregex && !inotifytools_ignore_events_by_inverted_regex(inc_iregex, REG_EXTENDED|
REG_ICASE))
) {
fprintf(stderr, "Error in `include' regular expression.\n");
return EXIT_FAILURE;
}
if ( !inotifytools_initialize() ) {
warn_inotify_init_error();
return EXIT_FAILURE;
}
// Attempt to watch file
// If events is still 0, make it all events.
if ( !events )
events = IN_ALL_EVENTS;
FileList list = construct_path_list( argc, argv, fromfile );
if (0 == list.watch_files[0]) {
fprintf(stderr, "No files specified to watch!\n");
return EXIT_FAILURE;
}
unsigned int num_watches = 0;
unsigned int status;
fprintf( stderr, "Establishing watches...\n" );
for ( int i = 0; list.watch_files[i]; ++i ) {
char const *this_file = list.watch_files[i];
if ( recursive && verbose ) {
fprintf( stderr, "Setting up watch(es) on %s\n", this_file );
}
if ( recursive ) {
status = inotifytools_watch_recursively_with_exclude(
this_file,
events,
list.exclude_files );
}
else {
status = inotifytools_watch_file( this_file, events );
}
if ( !status ) {
if ( inotifytools_error() == ENOSPC ) {
fprintf(stderr, "Failed to watch %s; upper limit on inotify "
"watches reached!\n", this_file );
fprintf(stderr, "Please increase the amount of inotify watches "
"allowed per user via `/proc/sys/fs/inotify/"
"max_user_watches'.\n");
}
else {
fprintf(stderr, "Failed to watch %s: %s\n", this_file,
strerror( inotifytools_error() ) );
}
return EXIT_FAILURE;
}
if ( recursive && verbose ) {
fprintf( stderr, "OK, %s is now being watched.\n", this_file );
}
}
num_watches = inotifytools_get_num_watches();
if ( verbose ) {
fprintf( stderr, "Total of %d watches.\n",
num_watches );
}
fprintf( stderr, "Finished establishing watches, now collecting statistics.\n" );
if ( timeout && verbose ) {
fprintf( stderr, "Will listen for events for %d seconds.\n", timeout );
}
signal( SIGINT, handle_signal );
signal( SIGHUP, handle_signal );
signal( SIGTERM, handle_signal );
if ( timeout ) {
signal( SIGALRM, handle_signal );
alarm( timeout );
}
signal( SIGUSR1, print_info_now );
inotifytools_initialize_stats();
// Now wait till we get event
struct inotify_event * event;
char * moved_from = 0;
do {
event = inotifytools_next_event( 0 );
if ( !event ) {
if ( !inotifytools_error() ) {
return EXIT_TIMEOUT;
}
else if ( inotifytools_error() != EINTR ) {
fprintf(stderr, "%s\n", strerror( inotifytools_error() ) );
return EXIT_FAILURE;
}
else {
continue;
}
}
// if we last had MOVED_FROM and don't currently have MOVED_TO,
// moved_from file must have been moved outside of tree - so unwatch it.
if ( moved_from && !(event->mask & IN_MOVED_TO) ) {
if ( !inotifytools_remove_watch_by_filename( moved_from ) ) {
fprintf( stderr, "Error removing watch on %s: %s\n",
moved_from, strerror(inotifytools_error()) );
}
free( moved_from );
moved_from = 0;
}
if ( recursive ) {
if ((event->mask & IN_CREATE) ||
(!moved_from && (event->mask & IN_MOVED_TO))) {
// New file - if it is a directory, watch it
static char * new_file;
nasprintf( &new_file, "%s%s",
inotifytools_filename_from_wd( event->wd ),
event->name );
if ( isdir(new_file) &&
!inotifytools_watch_recursively( new_file, events ) ) {
fprintf( stderr, "Couldn't watch new directory %s: %s\n",
new_file, strerror( inotifytools_error() ) );
}
free( new_file );
} // IN_CREATE
else if (event->mask & IN_MOVED_FROM) {
nasprintf( &moved_from, "%s%s/",
inotifytools_filename_from_wd( event->wd ),
event->name );
// if not watched...
if ( inotifytools_wd_from_filename(moved_from) == -1 ) {
free( moved_from );
moved_from = 0;
}
} // IN_MOVED_FROM
else if (event->mask & IN_MOVED_TO) {
if ( moved_from ) {
static char * new_name;
nasprintf( &new_name, "%s%s/",
inotifytools_filename_from_wd( event->wd ),
event->name );
inotifytools_replace_filename( moved_from, new_name );
free( moved_from );
moved_from = 0;
} // moved_from
}
}
} while ( !done );
return print_info();
}
int main(int argc, char ** argv)
{
int events = 0;
int orig_events;
bool monitor = false;
int quiet = 0;
unsigned long int timeout = 0;
int recursive = 0;
bool csv = false;
bool daemon = false;
bool syslog = false;
char * format = NULL;
char * timefmt = NULL;
char * fromfile = NULL;
char * outfile = NULL;
char * exc_regex = NULL;
char * exc_iregex = NULL;
char * inc_regex = NULL;
char * inc_iregex = NULL;
pid_t pid;
int fd;
// Parse commandline options, aborting if something goes wrong
if ( !parse_opts(&argc, &argv, &events, &monitor, &quiet, &timeout,
&recursive, &csv, &daemon, &syslog, &format, &timefmt,
&fromfile, &outfile,
&exc_regex, &exc_iregex, &inc_regex, &inc_iregex) ) {
return EXIT_FAILURE;
}
if ( !inotifytools_initialize() ) {
warn_inotify_init_error();
return EXIT_FAILURE;
}
if ( timefmt ) inotifytools_set_printf_timefmt( timefmt );
if (
(exc_regex && !inotifytools_ignore_events_by_regex(exc_regex, REG_EXTENDED) ) ||
(exc_iregex && !inotifytools_ignore_events_by_regex(exc_iregex, REG_EXTENDED|
REG_ICASE))
) {
fprintf(stderr, "Error in `exclude' regular expression.\n");
return EXIT_FAILURE;
}
if (
(inc_regex && !inotifytools_ignore_events_by_inverted_regex(inc_regex, REG_EXTENDED) ) ||
(inc_iregex && !inotifytools_ignore_events_by_inverted_regex(inc_iregex, REG_EXTENDED|
REG_ICASE))
) {
fprintf(stderr, "Error in `include' regular expression.\n");
return EXIT_FAILURE;
}
if ( format ) validate_format(format);
// Attempt to watch file
// If events is still 0, make it all events.
if (events == 0)
events = IN_ALL_EVENTS;
orig_events = events;
if ( monitor && recursive ) {
events = events | IN_CREATE | IN_MOVED_TO | IN_MOVED_FROM;
}
FileList list = construct_path_list( argc, argv, fromfile );
if (0 == list.watch_files[0]) {
fprintf(stderr, "No files specified to watch!\n");
return EXIT_FAILURE;
}
// Daemonize - BSD double-fork approach
if ( daemon ) {
pid = fork();
if (pid < 0) {
fprintf(stderr, "Failed to fork1 whilst daemonizing!\n");
return EXIT_FAILURE;
}
if (pid > 0) {
_exit(0);
}
if (setsid() < 0) {
fprintf(stderr, "Failed to setsid whilst daemonizing!\n");
return EXIT_FAILURE;
}
signal(SIGHUP,SIG_IGN);
pid = fork();
if (pid < 0) {
fprintf(stderr, "Failed to fork2 whilst daemonizing!\n");
return EXIT_FAILURE;
}
if (pid > 0) {
_exit(0);
}
if (chdir("/") < 0) {
fprintf(stderr, "Failed to chdir whilst daemonizing!\n");
return EXIT_FAILURE;
}
// Redirect stdin from /dev/null
fd = open("/dev/null", O_RDONLY);
if (fd != fileno(stdin)) {
dup2(fd, fileno(stdin));
close(fd);
}
// Redirect stdout to a file
fd = open(outfile, O_WRONLY | O_CREAT | O_APPEND, 0600);
if (fd < 0) {
fprintf( stderr, "Failed to open output file %s\n", outfile );
return EXIT_FAILURE;
}
if (fd != fileno(stdout)) {
dup2(fd, fileno(stdout));
close(fd);
}
// Redirect stderr to /dev/null
fd = open("/dev/null", O_WRONLY);
if (fd != fileno(stderr)) {
dup2(fd, fileno(stderr));
close(fd);
}
} else if (outfile != NULL) { // Redirect stdout to a file if specified
fd = open(outfile, O_WRONLY | O_CREAT | O_APPEND, 0600);
if (fd < 0) {
fprintf( stderr, "Failed to open output file %s\n", outfile );
return EXIT_FAILURE;
}
if (fd != fileno(stdout)) {
dup2(fd, fileno(stdout));
close(fd);
}
}
if ( syslog ) {
openlog ("inotifywait", LOG_CONS | LOG_PID | LOG_NDELAY, LOG_DAEMON);
}
if ( !quiet ) {
if ( recursive ) {
output_error( syslog, "Setting up watches. Beware: since -r "
"was given, this may take a while!\n" );
} else {
output_error( syslog, "Setting up watches.\n" );
}
}
// now watch files
for ( int i = 0; list.watch_files[i]; ++i ) {
char const *this_file = list.watch_files[i];
if ( (recursive && !inotifytools_watch_recursively_with_exclude(
this_file,
events,
list.exclude_files ))
|| (!recursive && !inotifytools_watch_file( this_file, events )) ){
if ( inotifytools_error() == ENOSPC ) {
output_error( syslog, "Failed to watch %s; upper limit on inotify "
"watches reached!\n", this_file );
output_error( syslog, "Please increase the amount of inotify watches "
"allowed per user via `/proc/sys/fs/inotify/"
"max_user_watches'.\n");
}
else {
output_error( syslog, "Couldn't watch %s: %s\n", this_file,
strerror( inotifytools_error() ) );
}
return EXIT_FAILURE;
}
}
if ( !quiet ) {
output_error( syslog, "Watches established.\n" );
}
// Now wait till we get event
struct inotify_event * event;
char * moved_from = 0;
do {
event = inotifytools_next_event( timeout );
if ( !event ) {
if ( !inotifytools_error() ) {
return EXIT_TIMEOUT;
}
else {
output_error( syslog, "%s\n", strerror( inotifytools_error() ) );
return EXIT_FAILURE;
}
}
if ( quiet < 2 && (event->mask & orig_events) ) {
if ( csv ) {
output_event_csv( event );
}
else if ( format ) {
inotifytools_printf( event, format );
}
else {
inotifytools_printf( event, "%w %,e %f\n" );
}
}
// if we last had MOVED_FROM and don't currently have MOVED_TO,
// moved_from file must have been moved outside of tree - so unwatch it.
if ( moved_from && !(event->mask & IN_MOVED_TO) ) {
if ( !inotifytools_remove_watch_by_filename( moved_from ) ) {
output_error( syslog, "Error removing watch on %s: %s\n",
moved_from, strerror(inotifytools_error()) );
}
free( moved_from );
moved_from = 0;
}
if ( monitor && recursive ) {
if ((event->mask & IN_CREATE) ||
(!moved_from && (event->mask & IN_MOVED_TO))) {
// New file - if it is a directory, watch it
static char * new_file;
nasprintf( &new_file, "%s%s",
inotifytools_filename_from_wd( event->wd ),
event->name );
if ( isdir(new_file) &&
!inotifytools_watch_recursively( new_file, events ) ) {
output_error( syslog, "Couldn't watch new directory %s: %s\n",
new_file, strerror( inotifytools_error() ) );
}
free( new_file );
} // IN_CREATE
else if (event->mask & IN_MOVED_FROM) {
nasprintf( &moved_from, "%s%s/",
inotifytools_filename_from_wd( event->wd ),
event->name );
// if not watched...
if ( inotifytools_wd_from_filename(moved_from) == -1 ) {
free( moved_from );
moved_from = 0;
}
} // IN_MOVED_FROM
else if (event->mask & IN_MOVED_TO) {
if ( moved_from ) {
static char * new_name;
nasprintf( &new_name, "%s%s/",
inotifytools_filename_from_wd( event->wd ),
event->name );
inotifytools_replace_filename( moved_from, new_name );
free( moved_from );
moved_from = 0;
} // moved_from
}
}
fflush( NULL );
} while ( monitor );
// If we weren't trying to listen for this event...
if ( (events & event->mask) == 0 ) {
// ...then most likely something bad happened, like IGNORE etc.
return EXIT_FAILURE;
}
return EXIT_SUCCESS;
}