1 files changed, 92 insertions, 0 deletions
diff --git a/common/inotify_helpers.c b/common/inotify_helpers.c
new file mode 100644
index 0000000..0aac023
--- /dev/null
+++ b/common/inotify_helpers.c
@@ -0,0 +1,92 @@
+#include <stdio.h>
+#include <stdlib.h>
+
+#include "inotify_helpers.h"
+
+static
+const char *in_bits[] = {
+	/* main */
+	"IN_ACCESS",	// 0
+	"IN_MODIFY",	// 1
+	"IN_ATTRIB",	// 2
+	"IN_CLOSE_WRITE",	// 3
+	"IN_CLOSE_NOWRITE",	// 4
+	"IN_OPEN",	// 5
+	"IN_MOVED_FROM",	// 6
+	"IN_MOVED_TO",	// 7
+	"IN_CREATE",	// 8
+	"IN_DELETE",	// 9
+	"IN_DELETE_SELF",	// 10
+	"IN_MOVE_SELF",	// 11
+	/* gap */
+	"<invalid-12>",	// 12
+	/* events sent by the kernel */
+	"IN_UNMOUNT",	// 13
+	"IN_Q_OVERFLOW",	// 14
+	"IN_IGNORED",	// 15
+	/* gap */
+	"<invalid-16>",	// 16
+	"<invalid-17>",	// 17
+	"<invalid-18>",	// 18
+	"<invalid-19>",	// 19
+	"<invalid-20>",	// 20
+	"<invalid-21>",	// 21
+	"<invalid-22>",	// 22
+	"<invalid-23>",	// 23
+	/* special flags */
+	"IN_ONLYDIR",	// 24
+	"IN_DONT_FOLLOW",	// 25
+	"IN_EXCL_UNLINK",	// 26
+	"<invalid-27>",	// 27
+	"<invalid-28>",	// 28
+	"IN_MASK_ADD",	// 29
+	"IN_ISDIR",	// 30
+	"IN_ONESHOT",	// 31
+};
+
+char *inotify_mask2str(uint32 mask);
+int inotify_print_event(FILE *file, struct inotify_event *event);
+
+
+struct strbuf {
+	char *str; 
+	size_t len;
+	size_t cap;
+};
+
+static
+void strbufcat(struct strbuf *a, const char *b) {
+	size_t blen = strlen(b);
+	while (a->cap <= (a->len + blen)) {
+		a->cap += 256;
+		a->str = realloc(a->str, a->cap);
+	}
+	memcpy(&(a->str[a->len]), b, blen+1);
+	a->len += blen;
+}
+
+
+char *inotify_mask2str(uint32_t mask) {
+	struct strbuf out = { NULL, 0, 0 };
+	for (size_t i = 0; i < sizeof(in_bits)/sizeof(in_bits[0]); i++) {
+		if (mask & (1 << i)) {
+			if (out.len > 0)
+				strbufcat(&out, ", ");
+			strbufcat(&out, in_bits[i]);
+		}
+	}
+	return out.str;
+}
+
+int inotify_print_event(struct inotify_event *event) {
+	return printf("wd:%d\n"
+	              "\tmask:[%s]\n"
+	              "\tcookie:%u\n"
+	              "\tlen:%u\n"
+	              "\tname:%s\n",
+	              event->wd,
+	              mask2str(event->mask),
+	              event->cookie,
+	              event->len,
+	              event->len > 0 ? event->name : "");
+}