From 59d34ee47b14c728ebd6399fb89c409383a1aa2e Mon Sep 17 00:00:00 2001
From: Tobias Klauser <tklauser@distanz.ch>
Date: Fri, 11 Jul 2008 00:04:58 +0200
Subject: Initial import

---
 Makefile        |  21 +++++++++++
 direct-append.c |  71 +++++++++++++++++++++++++++++++++++
 inotify-watch.c | 113 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 205 insertions(+)
 create mode 100644 Makefile
 create mode 100644 direct-append.c
 create mode 100644 inotify-watch.c

diff --git a/Makefile b/Makefile
new file mode 100644
index 0000000..0212a22
--- /dev/null
+++ b/Makefile
@@ -0,0 +1,21 @@
+CC	:= gcc
+CFLAGS	:= $(CFLAGS) -I../inotail -W -Wall -pipe -D_USE_SOURCE \
+	   -Wstrict-prototypes -Wsign-compare -Wshadow -Wchar-subscripts \
+	   -Wmissing-declarations -Wpointer-arith -Wcast-align -Wmissing-prototypes
+
+# Compile with 'make DEBUG=true' to enable debugging
+DEBUG = false
+ifeq ($(strip $(DEBUG)),true)
+	CFLAGS  += -g -DDEBUG -fmudflap
+	LDFLAGS += -lmudflap
+endif
+
+all: inotify-watch direct-append
+inotify-watch: inotify-watch.o
+direct-append: direct-append.o
+
+%.o: %.c %.h
+	$(CC) $(CFLAGS) -c $< -o $@
+
+clean:
+	rm -f inotify-watch direct-append *.o
diff --git a/direct-append.c b/direct-append.c
new file mode 100644
index 0000000..bf18c72
--- /dev/null
+++ b/direct-append.c
@@ -0,0 +1,71 @@
+/*
+ * Append some random characters to a file
+ *
+ * Just a small tool to debug inotify
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+
+#include <sys/stat.h>
+#include <fcntl.h>
+
+#define DEFAULT_N_CHARS 1024
+
+static char get_random_printable_char(void)
+{
+	int fd;
+	char ret;
+
+	fd = open("/dev/urandom", O_RDONLY);
+	if (fd < 0) {
+		perror("open");
+		exit(EXIT_FAILURE);
+	}
+
+	do {
+		read(fd, &ret, sizeof(ret));
+	} while (ret < 0x20 || ret > 0x7e);
+
+	close(fd);
+
+	return ret;
+}
+
+int main(int argc, char *argv[])
+{
+	int fd, n_chars, i;
+	char *str;
+
+	if (argc < 3) {
+		fprintf(stderr, "Usage: %s <file> <n_chars>\n", argv[0]);
+		exit(EXIT_FAILURE);
+	}
+
+	/* Open the file, create it in case it doesn't exist */
+	if ((fd = open(argv[1], O_CREAT|O_WRONLY, S_IRUSR|S_IWUSR|S_IRGRP|S_IROTH)) < 0) {
+		perror("open");
+		exit(EXIT_FAILURE);
+	}
+
+	if (lseek(fd, 0, SEEK_END) < 0) {
+		perror("lseek");
+		exit(EXIT_FAILURE);
+	}
+
+	n_chars = strtoul(argv[2], NULL, 0);
+	if (n_chars <= 0)
+		n_chars = DEFAULT_N_CHARS;
+
+	str = malloc(n_chars * sizeof(char));
+
+	for (i = 0; i < n_chars; i++)
+		str[i] = get_random_printable_char();
+
+	write(fd, str, n_chars);
+	free(str);
+	close(fd);
+
+	exit(EXIT_SUCCESS);
+}
diff --git a/inotify-watch.c b/inotify-watch.c
new file mode 100644
index 0000000..7ccf9c4
--- /dev/null
+++ b/inotify-watch.c
@@ -0,0 +1,113 @@
+/*
+ * inotify-watchdir.c
+ *
+ * Watch a file or directory for changes using inotify
+ *
+ * Copyright (c) Tobias Klauser <tklauser@distanz.ch>
+ * All rights reserved
+ */
+
+#include <stdio.h>
+#include <stdint.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <sys/syscall.h>
+
+#include "inotify.h"
+#include "inotify-syscalls.h"
+
+struct mask2string {
+	uint32_t mask;
+	const char *desc;
+};
+
+static struct mask2string events[] = {
+	{ IN_ACCESS, "ACCESS" },
+	{ IN_MODIFY, "MODIFY" },
+	{ IN_ATTRIB, "ATTRIB" },
+	{ IN_CLOSE_WRITE, "CLOSE_WRITE" },
+	{ IN_CLOSE_NOWRITE, "CLOSE_NOWRITE" },
+	{ IN_OPEN, "OPEN" },
+	{ IN_MOVED_FROM, "MOVED_FROM" },
+	{ IN_MOVED_TO, "MOVED_TO" },
+	{ IN_CREATE, "CREATE" },
+	{ IN_DELETE, "DELETE" },
+	{ IN_DELETE_SELF, "DELETE_SELF" },
+	{ IN_MOVE_SELF, "MOVE_SELF" },
+	{ IN_UNMOUNT, "UNMOUNT" },
+	{ IN_Q_OVERFLOW, "Q_OVERFLOW" },
+	{ IN_IGNORED, "IGNORED" },
+	/* special flags */
+	{ IN_ONLYDIR, "ONLYDIR" },
+	{ IN_DONT_FOLLOW, "DONT_FOLLOW" },
+	{ IN_MASK_ADD, "MASK_ADD" },
+	{ IN_ONESHOT, "ONESHOT" },
+	/* end of array */
+	{ -1, NULL }
+};
+
+static void inotify_print_event(struct inotify_event *inev)
+{
+	int i;
+
+	/* stat? */
+	printf("(%s) wd=%04x, cookie=%04x, len=%04x, name=\"%s\" :",
+			inev->mask & IN_ISDIR ? "dir" : "file", inev->wd, inev->cookie, inev->len, inev->name);
+
+	for (i = 0; events[i].desc; i++)
+		if (inev->mask & events[i].mask)
+			printf(" %s", events[i].desc);
+
+	printf("\n");
+}
+
+int main(int argc, char *argv[])
+{
+	int fd, len;
+	int *watches;
+	struct inotify_event *inev;
+	char buf[1024];
+
+	if (argc < 2) {
+		printf("Usage: %s <path> ...\n", *argv);
+		exit(EXIT_FAILURE);
+	}
+
+	++argv;
+
+	fd = inotify_init();
+	if (fd < 0) {
+		perror("inotify_init");
+		exit(EXIT_FAILURE);
+	}
+
+	watches = malloc(argc * sizeof(int));
+	if (!watches) {
+		perror("malloc");
+		exit(EXIT_FAILURE);
+	}
+
+	while (*argv) {
+		*watches = inotify_add_watch(fd, *argv, IN_ALL_EVENTS|IN_UNMOUNT);
+		if (*watches < 0) {
+			perror("inotify_add_watch");
+			exit(EXIT_FAILURE);
+		}
+		++watches;
+		++argv;
+	}
+
+	while (1) {
+		len = read(fd, buf, sizeof(buf));
+		inev = (struct inotify_event *) &buf;
+		while (len > 0) {
+			inotify_print_event(inev);
+
+			len -= sizeof(struct inotify_event) + inev->len;
+			inev = (struct inotify_event *) ((char *) inev + sizeof(struct inotify_event) + inev->len);
+		}
+	}
+
+	return 0;
+}
-- 
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