From 2497c1392b81e093f4de2541a98746aebd449a7f Mon Sep 17 00:00:00 2001
From: Peter Wu <lekensteyn@gmail.com>
Date: Wed, 26 Sep 2012 15:04:18 +0200
Subject: Initial commit

---
 inotify.c | 92 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 92 insertions(+)
 create mode 100644 inotify.c

(limited to 'inotify.c')

diff --git a/inotify.c b/inotify.c
new file mode 100644
index 0000000..d363c77
--- /dev/null
+++ b/inotify.c
@@ -0,0 +1,92 @@
+#include <stdio.h>
+#include <sys/inotify.h>
+#include <unistd.h>
+#include <malloc.h>
+
+#include <error.h>
+#include <errno.h>
+#define fail(msg) error(1, errno, msg)
+
+#ifndef PATH_MAX
+#	define PATH_MAX 4096
+#endif
+
+struct ev {
+	int val;
+	char *name;
+};
+
+#define STRVAL(val) #val
+#define IN(name) {IN_##name, STRVAL(name)}
+
+struct ev events[] = {
+	IN(CLOSE_WRITE),
+	IN(CLOSE_NOWRITE),
+	IN(OPEN),
+	{0, NULL}
+};
+
+int main(int argc, char **argv) {
+	int i, ifd, wfd, mask;
+	int wfds[argc - 1];
+	if (argc < 2) {
+		fprintf(stderr, "Usage: %s file_to_watch ...\n", argv[0]);
+		return 1;
+	}
+	for (i=1; i<argc; i++) {
+		printf("file = %s\n", argv[i]);
+	}
+
+	ifd = inotify_init();
+	if (ifd == -1) fail("inotify_init");
+	printf("ifd = %i\n", ifd);
+
+	mask = 0;
+
+	struct ev *event = events;
+	while (event->name != NULL) {
+		mask |= event->val;
+		printf("event IN_%-16s = %8x\n", event->name, event->val);
+		++event;
+	}
+	for (i=1; i<argc; i++) {
+		wfd = inotify_add_watch(ifd, argv[i], mask);
+		if (wfd == -1) fail("inotify_add_watch");
+		printf("wfd = %i\n", wfd);
+		wfds[i - 1] = wfd;
+	}
+
+	int iev_size = sizeof(struct inotify_event) + PATH_MAX + 1;
+	struct inotify_event *iev = malloc(iev_size);
+	if (!iev) fail("malloc");
+
+	putchar('\n');
+
+	int j = 100;
+	while (--j) {
+		char *file;
+		if (read(ifd, iev, iev_size) == -1) {
+			perror("read");
+			break;
+		}
+		for (i=0; i<argc-1; i++) {
+			if (wfds[i] == iev->wd) {
+				file = argv[i + 1];
+				break;
+			}
+		}
+		printf("wd = %i, mask = %x, name = %s\tfile = %s\n",
+			iev->wd, iev->mask, iev->name,
+			file);
+	}
+
+	free(iev);
+
+	for (i=0; i<argc-1; i++) {
+		wfd = wfds[i];
+		if (inotify_rm_watch(ifd, wfd) == -1) fail("inotify_rm_watch");
+	}
+
+	close(ifd);
+	return 0;
+}
-- 
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