1 files changed, 111 insertions, 0 deletions
diff --git a/lib/Linux/FANotify/LowLevel.pm b/lib/Linux/FANotify/LowLevel.pm
new file mode 100644
index 0000000..90d8568
--- /dev/null
+++ b/lib/Linux/FANotify/LowLevel.pm
@@ -0,0 +1,111 @@
+package Linux::FANotify::LowLevel;
+use 5.014;
+use strict;
+use warnings;
+my $ccode;my @exports;
+BEGIN {
+my @constants=qw(
+                    FAN_ACCESS
+                    FAN_MODIFY
+                    FAN_CLOSE_WRITE
+                    FAN_CLOSE_NOWRITE
+                    FAN_OPEN
+                    FAN_Q_OVERFLOW
+                    FAN_OPEN_PERM
+                    FAN_ACCESS_PERM
+                    FAN_ONDIR
+                    FAN_EVENT_ON_CHILD
+                    FAN_CLOSE
+                    FAN_CLOEXEC
+                    FAN_NONBLOCK
+                    FAN_CLASS_NOTIF
+                    FAN_CLASS_CONTENT
+                    FAN_CLASS_PRE_CONTENT
+                    FAN_ALL_CLASS_BITS
+                    FAN_UNLIMITED_QUEUE
+                    FAN_UNLIMITED_MARKS
+                    FAN_ALL_INIT_FLAGS
+                    FAN_MARK_ADD
+                    FAN_MARK_REMOVE
+                    FAN_MARK_DONT_FOLLOW
+                    FAN_MARK_ONLYDIR
+                    FAN_MARK_MOUNT
+                    FAN_MARK_IGNORED_MASK
+                    FAN_MARK_IGNORED_SURV_MODIFY
+                    FAN_MARK_FLUSH
+                    FAN_ALL_MARK_FLAGS
+                    FAN_ALL_EVENTS
+                    FAN_ALL_PERM_EVENTS
+                    FAN_ALL_OUTGOING_EVENTS
+                    FANOTIFY_METADATA_VERSION
+                    FAN_ALLOW
+                    FAN_DENY
+                    FAN_NOFD
+            );
+$ccode=<<EOC;
+#include <sys/fanotify.h>
+#include <stdlib.h>
+#include <string.h>
+EOC
+for my $c (@constants) {
+    my $sub_name = lc($c =~ s{^.*?_}{}r);
+    $ccode .= "long CONST_${sub_name}() { return $c; }\n";
+    push @exports,"CONST_${sub_name}";
+}
+$ccode.=<<EOC;
+int perl_fanotify_init(unsigned int flags, unsigned int event_f_flags) {
+    return fanotify_init(flags,event_f_flags);
+}
+
+int perl_fanotify_mark(int fanotify_fd, unsigned int flags,
+                       unsigned long mask, int dfd, const char *pathname) {
+    return fanotify_mark(fanotify_fd, flags, mask, dfd, pathname);
+}
+
+SV* perl_memalign(size_t alignment, size_t size) {
+  void* buffer=NULL;
+  int err;
+  err = posix_memalign(&buffer, alignment, size);
+  if (err != 0 || buffer == NULL) {
+    SV* bang = get_sv("!", 0);
+    sv_setiv(bang, (IV)err);
+    sv_setpvf(bang, "%s", strerror(err)); /* let Perl copy the string */
+    SvIOK_on(bang);
+    return &PL_sv_undef;
+  }
+  return sv_2mortal(newSVpvn(buffer,size));
+}
+AV* unpack_events(SV* svbuffer) {
+    STRLEN len;
+    void * buffer = SvPV(svbuffer,len);
+    AV* ret = newAV();
+    HV* event;
+    struct fanotify_event_metadata *data;
+    data = (struct fanotify_event_metadata *) buffer;
+
+    while(FAN_EVENT_OK(data,len)) {
+        event = newHV();
+        av_push(ret,newRV_noinc((SV*)event));
+        hv_store(event,"mask",4,newSViv(data->mask),0);
+        hv_store(event,"fd",2,newSViv(data->fd),0);
+        hv_store(event,"pid",3,newSViv(data->pid),0);
+        buffer = FAN_EVENT_NEXT(data,len);
+    }
+
+    return ret;
+}
+EOC
+}
+use Inline C => $ccode;
+use Sub::Exporter -setup => {
+    exports => [
+        @exports,
+        qw(perl_fanotify_init perl_fanotify_mark perl_memalign unpack_events)
+    ],
+    groups => {
+        constants => \@exports,
+        functions => [qw(perl_fanotify_init perl_fanotify_mark unpack_events)],
+    },
+};
+
+1;