Initial import of debian package for inotail0.2-1

16 files changed, 1282 insertions, 0 deletions

diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..7a5cfb5
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,7 @@
+# binary files
+*.o
+inotail
+inotify-watchdir
+
+# other
+cscope.out
diff --git a/LICENSE b/LICENSE
new file mode 100644
index 0000000..d511905
--- /dev/null
+++ b/LICENSE
@@ -0,0 +1,339 @@
+		    GNU GENERAL PUBLIC LICENSE
+		       Version 2, June 1991
+
+ Copyright (C) 1989, 1991 Free Software Foundation, Inc.,
+ 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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+    the Free Software Foundation; either version 2 of the License, or
+    (at your option) any later version.
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+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
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+    You should have received a copy of the GNU General Public License along
+    with this program; if not, write to the Free Software Foundation, Inc.,
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+    under certain conditions; type `show c' for details.
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+The hypothetical commands `show w' and `show c' should show the appropriate
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+library.  If this is what you want to do, use the GNU Lesser General
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diff --git a/Makefile b/Makefile
new file mode 100644
index 0000000..13b67c3
--- /dev/null
+++ b/Makefile
@@ -0,0 +1,44 @@
+# Makefile for inotail
+#
+# Copyright (C) 2006, Tobias Klauser <tklauser@distanz.ch>
+#
+# Licensed under the terms of the GNU General Public License; version 2 or later.
+
+VERSION = 0.2
+
+# Paths
+prefix	= /usr
+DESTDIR	=
+
+CC := gcc
+CFLAGS := -Wall -pipe -D_USE_SOURCE -DVERSION="\"$(VERSION)\""
+WARN := -Wstrict-prototypes -Wsign-compare -Wshadow \
+	-Wchar-subscripts -Wmissing-declarations -Wnested-externs \
+	-Wpointer-arith -Wcast-align -Wmissing-prototypes
+CFLAGS += $(WARN)
+
+# Compile with 'make DEBUG=true' to enable debugging
+DEBUG = false
+ifeq ($(strip $(DEBUG)),true)
+	CFLAGS  += -g -DDEBUG
+endif
+
+all: Makefile inotail
+inotail: inotail.o
+
+%.o: %.c %.h
+	$(CC) $(CFLAGS) -c $< -o $@
+
+install: inotail
+	install -m 775 -D inotail $(DESTDIR)$(prefix)/bin/inotail
+	install -m 644 -D inotail.1 $(DESTDIR)$(prefix)/share/man/man1/inotail.1
+
+cscope:
+	cscope -b
+
+release:
+	git-archive --format=tar --prefix=inotail-0.2/ HEAD | gzip -9v > ../inotail-$(VERSION).tar.gz
+	git-archive --format=tar --prefix=inotail-0.2/ HEAD | bzip2 -9v > ../inotail-$(VERSION).tar.bz2
+
+clean:
+	rm -f inotail *.o cscope.*
diff --git a/README b/README
new file mode 100644
index 0000000..7c13988
--- /dev/null
+++ b/README
@@ -0,0 +1,29 @@
+ inotail - inotify enhanced tail
+o===============================o
+
+inotail is a replacement for the 'tail' program found in the base installation
+of every Linux/UNIX system. It makes use of the inotify infrastructure in recent
+versions of the Linux kernel to speed up tailing files in the follow mode (the
+'-f' option). Standard tail polls the file every second by default while inotail
+listens to special events sent by the kernel through the inotify API to
+determine whether a file needs to be reread.
+
+Currently inotail is not fully compatible to neither POSIX or GNU tail but might
+be in the future.
+
+Requirements
+------------
+- Linux kernel 2.6.13 or higher with CONFIG_INOTIFY enabled
+- Standard C Library (tested with GNU libc but might work with others too)
+
+License
+-------
+inotail is licensed under the terms of the GNU General Public License version 2
+or later. You can find the full text in the file LICENSE in the source tree of
+inotail.
+
+The files inotify.h and inotify-syscalls.h were taken from the source tree of
+the Linux kernel and slightly altered. Both are licensed under the terms of the
+GNU General Public License version 2.
+
+-- Tobias Klauser <tklauser@distanz.ch>
diff --git a/changelog b/changelog
new file mode 100644
index 0000000..5e161ff
--- /dev/null
+++ b/changelog
@@ -0,0 +1,7 @@
+inotail 0.2
+
+  * Support for the -n/-c +<num> options (tail relative to start of file)
+  * Copyright and license cleanup
+  * Various fixes
+
+  -- Tobias Klauser <tklauser@distanz.ch.ch> 2006-11-30 17:56
diff --git a/debian/changelog b/debian/changelog
new file mode 100644
index 0000000..6f4d25b
--- /dev/null
+++ b/debian/changelog
@@ -0,0 +1,11 @@
+inotail (0.2-1) unstable; urgency=low
+
+  * New upstream release
+
+ -- Tobias Klauser <tklauser@access.unizh.ch>  Mon,  4 Dec 2006 20:32:53 +0100
+
+inotail (0.1-1) unstable; urgency=low
+
+  * Initial release. (Closes: #388512)
+
+ -- Tobias Klauser <tklauser@access.unizh.ch>  Tue, 22 Aug 2006 23:22:55 +0200
diff --git a/debian/compat b/debian/compat
new file mode 100644
index 0000000..b8626c4
--- /dev/null
+++ b/debian/compat
@@ -0,0 +1 @@
+4
diff --git a/debian/control b/debian/control
new file mode 100644
index 0000000..6362a90
--- /dev/null
+++ b/debian/control
@@ -0,0 +1,19 @@
+Source: inotail
+Section: utils
+Priority: optional
+Maintainer: Tobias Klauser <tklauser@access.unizh.ch>
+Build-Depends: debhelper (>= 4)
+Standards-Version: 3.7.2
+
+Package: inotail
+Architecture: any
+Depends: ${shlibs:Depends}
+Description: tail replacement using inotify
+ inotail is a replacement for the 'tail' program found in the base installation
+ of every Linux/UNIX system. It makes use of the inotify infrastructure in
+ recent versions of the Linux kernel to speed up tailing files in the follow
+ mode (the '-f' option). Standard tail polls the file every second by default
+ while inotail listens to special events sent by the kernel through the inotify
+ API to determine whether a file needs to be reread.
+ .
+  Homepage: <http://distanz.ch/inotail>
diff --git a/debian/copyright b/debian/copyright
new file mode 100644
index 0000000..d2745f5
--- /dev/null
+++ b/debian/copyright
@@ -0,0 +1,47 @@
+This package was debianized by Tobias Klauser <tklauser@access.unizh.ch> on
+Tue, 22 Aug 2006 23:22:55 +0200.
+
+It was downloaded from <http://distanz.ch/inotail>.
+
+Upstream Author: Tobias Klauser <tklauser@distanz.ch>
+
+License (inotify.h and inotify-syscalls.h):
+
+        Copyright (C) 2005 John McCutchan
+
+        This program is free software; you can redistribute it and/or modify
+        it under the terms of the GNU General Public License as published by
+        the Free Software Foundation; version 2 of the License.
+
+        This program is distributed in the hope that it will be useful,
+        but WITHOUT ANY WARRANTY; without even the implied warranty of
+        MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+        GNU General Public License for more details.
+
+        You should have received a copy of the GNU General Public License
+        along with this program; if not, write to the Free Software
+        Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+
+On Debian systems, the complete text of the GNU General Public License
+can be found in /usr/share/common-licenses/GPL file.
+
+License (everything else):
+
+        Copyright (C) 2005-2006 Tobias Klauser <tklauser@distanz.ch>
+
+        This program is free software; you can redistribute it and/or modify
+        it under the terms of the GNU General Public License as published by
+        the Free Software Foundation; either version 2 of the License, or
+        (at your option) any later version.
+
+        This program is distributed in the hope that it will be useful,
+        but WITHOUT ANY WARRANTY; without even the implied warranty of
+        MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+        GNU General Public License for more details.
+
+        You should have received a copy of the GNU General Public License
+        along with this program; if not, write to the Free Software
+        Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+
+On Debian systems, the complete text of the GNU General Public License
+can be found in /usr/share/common-licenses/GPL file.
diff --git a/debian/docs b/debian/docs
new file mode 100644
index 0000000..e845566
--- /dev/null
+++ b/debian/docs
@@ -0,0 +1 @@
+README
diff --git a/debian/rules b/debian/rules
new file mode 100755
index 0000000..8618b96
--- /dev/null
+++ b/debian/rules
@@ -0,0 +1,48 @@
+#!/usr/bin/make -f
+
+build: build-stamp
+build-stamp:
+	dh_testdir
+
+	$(MAKE)
+
+	touch build-stamp
+
+clean:
+	dh_testdir
+	dh_testroot
+	rm -f build-stamp
+
+	$(MAKE) clean
+
+	dh_clean
+
+install: build
+	dh_testdir
+	dh_testroot
+	dh_clean -k
+	dh_installdirs
+
+	$(MAKE) install DESTDIR=$(CURDIR)/debian/inotail
+
+binary-indep: build install
+# We have nothing to do by default.
+
+binary-arch: build install
+	dh_testdir
+	dh_testroot
+	dh_installchangelogs
+	dh_installdocs
+	dh_install
+	dh_link
+	dh_strip
+	dh_compress
+	dh_fixperms
+	dh_installdeb
+	dh_shlibdeps
+	dh_gencontrol
+	dh_md5sums
+	dh_builddeb
+
+binary: binary-indep binary-arch
+.PHONY: build clean binary-indep binary-arch binary install
diff --git a/inotail.1 b/inotail.1
new file mode 100644
index 0000000..2c19ac3
--- /dev/null
+++ b/inotail.1
@@ -0,0 +1,59 @@
+'\" t
+.\" ** The above line should force tbl to be a preprocessor **
+.\" Man page for inotail
+.\"
+.\" Copyright (c) 2006 Tobias Klauser <tklauser@distanz.ch>
+.\"
+.\" You may distribute under the terms of the GNU General Public
+.\" License as specified in the file COPYING that comes with
+.\" inotail.
+
+.pc
+.TH INOTAIL 1 "2006-08-13" "" "Inotify enhanced tail"
+.SH NAME
+inotail \- A fast and lightweight version of tail using inotify
+.SH SYNOPSIS
+.B inotail
+[OPTION]... [FILE]...
+.SH DESCRIPTION
+.B inotail
+is a replacement for the 'tail' program found in the base installation of every
+Linux/UNIX system. It makes use of the inotify infrastructure in recent versions
+of the Linux kernel to speed up tailing files in the follow mode (the '\-f'
+option). Standard tail polls the file every second by default while inotail
+listens to special events sent by the kernel through the inotify API to
+determine whether a file needs to be reread. \fINote:\fR inotail will not work
+on systems running a kernel without inotify. To enable inotify, please set
+CONFIG_INOTIFY=y in your Linux kernel configuration and recompile it.
+.PP
+Currently inotail is not fully compatible to neither POSIX or GNU tail but might
+be in the future.
+.SH OPTIONS
+.TP
+.B \-c \fIN\fR, \fB\-\-bytes\fR=\fIN\fR
+output the last N bytes. If the first character of N is a '+', begin printing
+with the Nth character from the start of each file.
+.TP
+.B \-f, \fB\-\-follow
+keep the file(s) open and print appended data as the file grows
+.TP
+.B \-n \fIN\fR, \fB\-\-lines\fR=\fIN\fR
+output the last N lines (default: 10) If the first character of N is a '+',
+begin printing with  with the Nth line from the start of each file.
+.TP
+.B \-v, \fB\-\-verbose
+print headers with file names
+.TP
+.B \-h, \fB\-\-help
+show help and exit
+.TP
+.B \-V, \fB\-\-version
+show inotail version and exit
+.SH AUTHOR
+.PP
+Written by Tobias Klauser
+<tklauser@distanz.ch>
+.SH SEE ALSO
+.PP
+.BR tail(1),
+.BR inotify(7)
diff --git a/inotail.c b/inotail.c
new file mode 100644
index 0000000..7b58477
--- /dev/null
+++ b/inotail.c
@@ -0,0 +1,464 @@
+/*
+ * inotail.c
+ * A fast implementation of tail which uses the inotify API present in
+ * recent versions of the Linux kernel.
+ *
+ * Copyright (C) 2005-2006, Tobias Klauser <tklauser@distanz.ch>
+ *
+ * The idea was taken from turbotail.
+ *
+ * This program is free software; you can redistribute it and/or modify it under
+ * the terms of the GNU General Public License as published by the Free Software
+ * Foundation; either version 2, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
+ * FOR A PARTICULAR PURPOSE.  See the GNU General Public License for more
+ * details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program; if not, write to the Free Software Foundation, Inc., 51
+ * Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ */
+
+#define _GNU_SOURCE
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <errno.h>
+#include <getopt.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+
+#include "inotify.h"
+#include "inotify-syscalls.h"
+
+#include "inotail.h"
+
+#define PROGRAM_NAME "inotail"
+#define BUFFER_SIZE 4096
+
+/* (ino)tail works on these file types */
+#define IS_TAILABLE(mode) \
+	(S_ISREG(mode) || S_ISFIFO(mode) || S_ISSOCK(mode) || S_ISCHR(mode))
+
+/* Print header with filename before tailing the file? */
+static char verbose = 0;
+
+/* Tailing relative to begin or end of file */
+static char from_begin = 0;
+
+/* Command line options */
+static const struct option long_opts[] = {
+	{"bytes", required_argument, NULL, 'c'},
+	{"follow", optional_argument, NULL, 'f'},
+	{"lines", required_argument, NULL, 'n'},
+	{"verbose", no_argument, NULL, 'v'},
+	{"help", no_argument, NULL, 'h'},
+	{"version", no_argument, NULL, 'V'},
+	{NULL, 0, NULL, 0}
+};
+
+static void usage(const int status)
+{
+	fprintf(stderr, "Usage: %s [OPTION]... [FILE]...\n\n"
+			"  -c N, --bytes=N    output the last N bytes\n"
+			"  -f,   --follow     output as the file grows\n"
+			"  -n N, --lines=N    output the last N lines (default: %d)\n"
+			"  -v,   --verbose    print headers with file names\n"
+			"  -h,   --help       show this help and exit\n"
+			"  -V,   --version    show version and exit\n\n"
+			"If the first character of N (the number of bytes or lines) is a `+',\n"
+			"begin printing with the Nth item from the start of each file, otherwise,\n"
+			"print the last N items in the file.\n", PROGRAM_NAME, DEFAULT_N_LINES);
+
+	exit(status);
+}
+
+static void setup_file(struct file_struct *f)
+{
+	f->fd = -1;
+	f->st_size = 0;
+	f->ignore = 0;
+	f->i_watch = -1;
+}
+
+static inline char *pretty_name(char *filename)
+{
+	return (strncmp(filename, "-", 1) == 0) ? "standard input" : filename;
+}
+
+static void write_header(char *filename)
+{
+	static unsigned short first_file = 1;
+
+	fprintf(stdout, "%s==> %s <==\n", (first_file ? "" : "\n"), pretty_name(filename));
+	first_file = 0;
+}
+
+static off_t lines_to_offset_from_end(struct file_struct *f, unsigned int n_lines)
+{
+	char buf[BUFFER_SIZE];
+	off_t offset = f->st_size;
+
+	n_lines++;	/* We also count the last \n */
+	memset(&buf, 0, sizeof(buf));
+
+	while (offset > 0 && n_lines > 0) {
+		int i, rc;
+		int block_size = BUFFER_SIZE;	/* Size of the current block we're reading */
+
+		if (offset < BUFFER_SIZE)
+			block_size = offset;
+
+		/* Start of current block */
+		offset -= block_size;
+
+		lseek(f->fd, offset, SEEK_SET);
+
+		rc = read(f->fd, &buf, block_size);
+		if (rc < 0) {
+			fprintf(stderr, "Error: Could not read from file '%s' (%s)\n", f->name, strerror(errno));
+			return -1;
+		}
+
+		for (i = block_size; i > 0; i--) {
+			if (buf[i] == '\n') {
+				n_lines--;
+
+				if (n_lines == 0) {
+					offset += i + 1; /* We don't want the first \n */
+					break;
+				}
+			}
+		}
+	}
+
+	return offset;
+
+}
+
+static off_t lines_to_offset_from_begin(struct file_struct *f, unsigned int n_lines)
+{
+	char buf[BUFFER_SIZE];
+	off_t offset = 0;
+
+	/* tail everything for 'inotail -n +0' */
+	if (n_lines == 0)
+		return 0;
+
+	n_lines--;
+	memset(&buf, 0, sizeof(buf));
+
+	while (offset <= f->st_size && n_lines > 0) {
+		int i, rc;
+		int block_size = BUFFER_SIZE;
+
+		lseek(f->fd, offset, SEEK_SET);
+
+		rc = read(f->fd, &buf, block_size);
+		if (rc < 0) {
+			fprintf(stderr, "Error: Could not read from file '%s' (%s)\n", f->name, strerror(errno));
+			return -1;
+		}
+
+		for (i = 0; i < block_size; i++) {
+			if (buf[i] == '\n') {
+				n_lines--;
+				if (n_lines == 0) {
+					offset += i + 1;
+					return offset;
+				}
+			}
+		}
+
+		offset += block_size;
+	}
+
+	return offset;
+}
+
+static off_t lines_to_offset(struct file_struct *f, unsigned int n_lines)
+{
+	if (from_begin)
+		return lines_to_offset_from_begin(f, n_lines);
+	else
+		return lines_to_offset_from_end(f, n_lines);
+}
+
+static inline off_t bytes_to_offset(struct file_struct *f, unsigned int n_bytes)
+{
+	/* tail everything for 'inotail -c +0' */
+	if (from_begin && n_bytes == 0)
+		return 0;
+	else
+		return (from_begin ? ((off_t) n_bytes - 1) : (f->st_size - (off_t) n_bytes));
+}
+
+static int tail_pipe(struct file_struct *f)
+{
+	int rc;
+	char buf[BUFFER_SIZE];
+
+	if (verbose)
+		write_header(f->name);
+
+	/* We will just tail everything here */
+	while ((rc = read(f->fd, &buf, BUFFER_SIZE)) > 0)
+		write(STDOUT_FILENO, buf, (size_t) rc);
+
+	return rc;
+}
+
+static int tail_file(struct file_struct *f, unsigned int n_units, char mode)
+{
+	int ret = -1;
+	ssize_t bytes_read = 0;
+	off_t offset = 0;
+	char buf[BUFFER_SIZE];
+	struct stat finfo;
+
+	if (strncmp(f->name, "-", 1) == 0)
+		f->fd = STDIN_FILENO;
+	else {
+		f->fd = open(f->name, O_RDONLY);
+		if (f->fd < 0) {
+			fprintf(stderr, "Error: Could not open file '%s' (%s)\n", f->name, strerror(errno));
+			return -1;
+		}
+	}
+
+	if (fstat(f->fd, &finfo) < 0) {
+		fprintf(stderr, "Error: Could not stat file '%s' (%s)\n", f->name, strerror(errno));
+		goto out;
+	}
+
+	if (!IS_TAILABLE(finfo.st_mode)) {
+		fprintf(stderr, "Error: '%s' of unsupported file type\n", f->name);
+		goto out;
+	}
+
+	/* We cannot seek on these */
+	if (S_ISFIFO(finfo.st_mode) || S_ISSOCK(finfo.st_mode) || f->fd == STDIN_FILENO)
+		return tail_pipe(f);
+
+	f->st_size = finfo.st_size;
+
+	if (mode == M_LINES)
+		offset = lines_to_offset(f, n_units);
+	else
+		offset = bytes_to_offset(f, n_units);
+
+	/* We only get negative offsets on errors */
+	if (offset < 0)
+		goto out;
+
+	if (verbose)
+		write_header(f->name);
+
+	lseek(f->fd, offset, SEEK_SET);
+
+	while ((bytes_read = read(f->fd, &buf, BUFFER_SIZE)) > 0)
+		write(STDOUT_FILENO, buf, (size_t) bytes_read);
+
+	ret = 0;
+out:
+	if (close(f->fd) < 0) {
+		fprintf(stderr, "Error: Could not close file '%s' (%s)\n", f->name, strerror(errno));
+		ret = -1;
+	}
+
+	return ret;
+}
+
+static int handle_inotify_event(struct inotify_event *inev, struct file_struct *fil, int n_ignored)
+{
+	off_t offset;
+
+	if (inev->mask & IN_MODIFY) {
+		int rc;
+		char fbuf[BUFFER_SIZE];
+		struct stat finfo;
+
+		fil->fd = open(fil->name, O_RDONLY);
+		if (fil->fd < 0) {
+			fprintf(stderr, "Error: Could not open file '%s' (%s)\n", fil->name, strerror(errno));
+			goto ignore;
+		}
+
+		if (fstat(fil->fd, &finfo) < 0) {
+			fprintf(stderr, "Error: Could not stat file '%s' (%s)\n", fil->name, strerror(errno));
+			close(fil->fd);
+			goto ignore;
+		}
+
+		offset = fil->st_size;
+		fil->st_size = finfo.st_size;
+
+		if (verbose)
+			write_header(fil->name);
+
+		memset(&fbuf, 0, sizeof(fbuf));
+
+		lseek(fil->fd, offset, SEEK_SET);
+		while ((rc = read(fil->fd, &fbuf, BUFFER_SIZE)) != 0)
+			write(STDOUT_FILENO, fbuf, rc);
+
+		close(fil->fd);
+
+		return n_ignored;
+	} else if (inev->mask & IN_DELETE_SELF) {
+		fprintf(stderr, "File '%s' deleted.\n", fil->name);
+	} else if (inev->mask & IN_MOVE_SELF) {
+		/* TODO: Try to follow file/fd */
+		fprintf(stderr, "File '%s' moved.\n", fil->name);
+	} else if (inev->mask & IN_UNMOUNT) {
+		fprintf(stderr, "Device containing file '%s' unmounted.\n", fil->name);
+	}
+
+ignore:
+	fil->ignore = 1;
+	n_ignored++;
+
+	return n_ignored;
+}
+
+static int watch_files(struct file_struct *f, int n_files)
+{
+	int ifd, i, n_ignored = 0;
+	unsigned buflen = 2 * n_files * sizeof(struct inotify_event);
+	struct inotify_event *inev;
+	char *buf;
+
+	ifd = inotify_init();
+	if (ifd < 0) {
+		fprintf(stderr, "Error: Inotify is not supported by the kernel you're currently running.\n");
+		exit(EXIT_FAILURE);
+	}
+
+	for (i = 0; i < n_files; i++) {
+		if (!f[i].ignore)
+			f[i].i_watch = inotify_add_watch(ifd, f[i].name,
+						IN_MODIFY|IN_DELETE_SELF|IN_MOVE_SELF|IN_UNMOUNT);
+		else
+			n_ignored++;
+	}
+
+	buf = malloc(buflen);
+	memset(buf, 0, buflen);
+
+	while (n_ignored < n_files) {
+		int len;
+
+		len = read(ifd, buf, buflen);
+		inev = (struct inotify_event *) buf;
+
+		while (len > 0) {
+			struct file_struct *fil = NULL;
+
+			/* Which file has produced the event? */
+			for (i = 0; i < n_files; i++) {
+				if (!f[i].ignore && f[i].fd >= 0 && f[i].i_watch == inev->wd) {
+					fil = &f[i];
+					break;
+				}
+			}
+
+			if (unlikely(!fil))
+				break;
+
+			n_ignored = handle_inotify_event(inev, fil, n_ignored);
+			len -= sizeof(struct inotify_event) + inev->len;
+			inev = (struct inotify_event *) ((char *) inev + sizeof(struct inotify_event) + inev->len);
+		}
+	}
+
+	free(buf);
+	close(ifd);
+
+	return n_ignored;
+}
+
+int main(int argc, char **argv)
+{
+	int i, c, ret = 0;
+	int n_files = 0;
+	int n_units = DEFAULT_N_LINES;
+	char forever = 0, mode = M_LINES;
+	char **filenames;
+	struct file_struct *files;
+
+	while ((c = getopt_long(argc, argv, "c:n:fvVh", long_opts, NULL)) != -1) {
+		switch (c) {
+		case 'c':
+			mode = M_BYTES;
+			/* fall through */
+		case 'n':
+			if (*optarg == '+')
+				from_begin = 1;
+			else if (*optarg == '-')
+				optarg++;
+			n_units = strtoul(optarg, NULL, 0);
+			if (n_units < 0)
+				n_units = 0;
+			break;
+                case 'f':
+			forever = 1;
+			break;
+		case 'v':
+			verbose = 1;
+			break;
+		case 'V':
+			fprintf(stderr, "%s %s\n", PROGRAM_NAME, VERSION);
+			return 0;
+		case 'h':
+			usage(EXIT_SUCCESS);
+		default:
+			usage(EXIT_FAILURE);
+		}
+	}
+
+	/* Do we have some files to read from? */
+	if (optind < argc) {
+		n_files = argc - optind;
+		filenames = argv + optind;
+	} else {
+		/* It must be stdin then */
+		static char *dummy_stdin = "-";
+		n_files++;
+		filenames = &dummy_stdin;
+
+		/* POSIX says that -f is ignored if no file operand is
+		   specified and standard input is a pipe. */
+		if (forever) {
+			struct stat finfo;
+			if (fstat(STDIN_FILENO, &finfo) == 0
+					&& (S_ISFIFO(finfo.st_mode) || S_ISSOCK(finfo.st_mode)))
+				forever = 0;
+		}
+	}
+
+	files = malloc(n_files * sizeof(struct file_struct));
+	if (!files) {
+		fprintf(stderr, "Error: Not enough memory (%s)\n", strerror(errno));
+		exit(EXIT_FAILURE);
+	}
+
+	for (i = 0; i < n_files; i++) {
+		files[i].name = filenames[i];
+		setup_file(&files[i]);
+		ret = tail_file(&files[i], n_units, mode);
+		if (ret < 0)
+			files[i].ignore = 1;
+	}
+
+	if (forever)
+		ret = watch_files(files, n_files);
+
+	free(files);
+
+	return ret;
+}
diff --git a/inotail.h b/inotail.h
new file mode 100644
index 0000000..e1590df
--- /dev/null
+++ b/inotail.h
@@ -0,0 +1,39 @@
+/*
+ * Copyright (C) 2005-2006, Tobias Klauser <tklauser@distanz.ch>
+ *
+ * Licensed under the terms of the GNU General Public License; version 2 or later.
+ */
+
+#ifndef _INOTAIL_H
+#define _INOTAIL_H
+
+/* Number of items to tail. */
+#define DEFAULT_N_LINES 10
+
+/* tail modes */
+enum { M_LINES, M_BYTES };
+
+/* Every tailed file is represented as a file_struct */
+struct file_struct {
+	char *name;		/* Name of file (or '-' for stdin) */
+	int fd;			/* File descriptor (or -1 if file is not open */
+	off_t st_size;		/* File size */
+
+	unsigned ignore;	/* Wheter to ignore the file in further processing */
+
+	int i_watch;		/* Inotify watch associated with file_struct */
+};
+
+#ifdef DEBUG
+# define dprintf(fmt, args...) fprintf(stderr, fmt, ##args)
+#else
+# define dprintf(fmt, args...)
+#endif /* DEBUG */
+
+#ifdef __GNUC__
+# define unlikely(x) __builtin_expect(!!(x), 0)
+#else
+# define unlikely(x) (x)
+#endif /* __GNUC__ */
+
+#endif /* _INOTAIL_H */
diff --git a/inotify-syscalls.h b/inotify-syscalls.h
new file mode 100644
index 0000000..a1d5408
--- /dev/null
+++ b/inotify-syscalls.h
@@ -0,0 +1,98 @@
+/*
+ * Inotify syscall numbers
+ * Taken from the Linux kernel source tree
+ *
+ * Licensed under the terms of the GNU General Public License Version 2.
+ *
+ * Copyright (c) 2006 Tobias Klauser <tklauser@distanz.ch>
+ */
+
+#ifndef _LINUX_INOTIFY_SYSCALLS_H
+#define _LINUX_INOTIFY_SYSCALLS_H
+
+#include <sys/syscall.h>
+
+#if defined(__i386__)
+# define __NR_inotify_init	291
+# define __NR_inotify_add_watch	292
+# define __NR_inotify_rm_watch	293
+#elif defined(__x86_64__)
+# define __NR_inotify_init	253
+# define __NR_inotify_add_watch	254
+# define __NR_inotify_rm_watch	255
+#elif defined(__powerpc__) || defined(__powerpc64__)
+# define __NR_inotify_init	275
+# define __NR_inotify_add_watch	276
+# define __NR_inotify_rm_watch	277
+#elif defined (__ia64__)
+# define __NR_inotify_init	1277
+# define __NR_inotify_add_watch	1278
+# define __NR_inotify_rm_watch	1279
+#elif defined (__s390__)
+# define __NR_inotify_init	284
+# define __NR_inotify_add_watch	285
+# define __NR_inotify_rm_watch	286
+#elif defined (__alpha__)
+# define __NR_inotify_init	444
+# define __NR_inotify_add_watch	445
+# define __NR_inotify_rm_watch	446
+#elif defined (__sparc__) || defined (__sparc64__)
+# define __NR_inotify_init	151
+# define __NR_inotify_add_watch	152
+# define __NR_inotify_rm_watch	156
+#elif defined (__arm__)
+# define __NR_OABI_SYSCALL_BASE	0x900000
+# if defined(__thumb__) || defined(__ARM_EABI__)
+#  define __NR_SYSCALL_BASE	0
+# else
+#  define __NR_SYSCALL_BASE	__NR_OABI_SYSCALL_BASE
+# endif
+# define __NR_inotify_init	(__NR_SYSCALL_BASE + 316)
+# define __NR_inotify_add_watch	(__NR_SYSCALL_BASE + 317)
+# define __NR_inotify_rm_watch	(__NR_SYSCALL_BASE + 318)
+#elif defined (__sh__)
+# define __NR_inotify_init	290
+# define __NR_inotify_add_watch	291
+# define __NR_inotify_rm_watch	292
+#elif defined (__hppa__)
+# define __NR_inotify_init	269
+# define __NR_inotify_add_watch	270
+# define __NR_inotify_rm_watch	271
+#elif defined (__mips__)
+# include <sgidefs.h>
+# if _MIPS_SIM == _MIPS_SIM_ABI32
+#  define __NR_Linux			4000
+#  define __NR_inotify_init		(__NR_Linux + 284)
+#  define __NR_inotify_add_watch	(__NR_Linux + 285)
+#  define __NR_inotify_rm_watch		(__NR_Linux + 286)
+# elif _MIPS_SIM == _MIPS_SIM_ABI64
+#  define __NR_Linux			5000
+#  define __NR_inotify_init		(__NR_Linux + 243)
+#  define __NR_inotify_add_watch	(__NR_Linux + 244)
+#  define __NR_inotify_rm_watch		(__NR_Linux + 245)
+# elif _MIPS_SIM == _MIPS_SIM_NABI32
+#  define __NR_Linux			6000
+#  define __NR_inotify_init		(__NR_Linux + 247)
+#  define __NR_inotify_add_watch	(__NR_Linux + 248)
+#  define __NR_inotify_rm_watch		(__NR_Linux + 249)
+# endif
+#else
+# error "inotify not supported on this architecture!"
+#endif
+
+static inline int inotify_init (void)
+{
+	return syscall (__NR_inotify_init);
+}
+
+static inline int inotify_add_watch (int fd, const char *name, __u32 mask)
+{
+	return syscall (__NR_inotify_add_watch, fd, name, mask);
+}
+
+static inline int inotify_rm_watch (int fd, __u32 wd)
+{
+	return syscall (__NR_inotify_rm_watch, fd, wd);
+}
+
+#endif /* _LINUX_INOTIFY_SYSCALLS_H */
diff --git a/inotify.h b/inotify.h
new file mode 100644
index 0000000..cd8062a
--- /dev/null
+++ b/inotify.h
@@ -0,0 +1,69 @@
+/*
+ * Inode based directory notification for Linux
+ * Taken from the Linux kernel source tree
+ *
+ * Licensed under the terms of the GNU General Public License Version 2.
+ *
+ * Copyright (C) 2005 John McCutchan
+ */
+
+#ifndef _LINUX_INOTIFY_H
+#define _LINUX_INOTIFY_H
+
+#include <linux/types.h>
+
+/*
+ * struct inotify_event - structure read from the inotify device for each event
+ *
+ * When you are watching a directory, you will receive the filename for events
+ * such as IN_CREATE, IN_DELETE, IN_OPEN, IN_CLOSE, ..., relative to the wd.
+ */
+struct inotify_event {
+	__s32		wd;		/* watch descriptor */
+	__u32		mask;		/* watch mask */
+	__u32		cookie;		/* cookie to synchronize two events */
+	__u32		len;		/* length (including nulls) of name */
+	char		name[0];	/* stub for possible name */
+};
+
+/* the following are legal, implemented events that user-space can watch for */
+#define IN_ACCESS		0x00000001	/* File was accessed */
+#define IN_MODIFY		0x00000002	/* File was modified */
+#define IN_ATTRIB		0x00000004	/* Metadata changed */
+#define IN_CLOSE_WRITE		0x00000008	/* Writtable file was closed */
+#define IN_CLOSE_NOWRITE	0x00000010	/* Unwrittable file closed */
+#define IN_OPEN			0x00000020	/* File was opened */
+#define IN_MOVED_FROM		0x00000040	/* File was moved from X */
+#define IN_MOVED_TO		0x00000080	/* File was moved to Y */
+#define IN_CREATE		0x00000100	/* Subfile was created */
+#define IN_DELETE		0x00000200	/* Subfile was deleted */
+#define IN_DELETE_SELF		0x00000400	/* Self was deleted */
+#define IN_MOVE_SELF		0x00000800	/* Self was moved */
+
+/* the following are legal events.  they are sent as needed to any watch */
+#define IN_UNMOUNT		0x00002000	/* Backing fs was unmounted */
+#define IN_Q_OVERFLOW		0x00004000	/* Event queued overflowed */
+#define IN_IGNORED		0x00008000	/* File was ignored */
+
+/* helper events */
+#define IN_CLOSE		(IN_CLOSE_WRITE | IN_CLOSE_NOWRITE) /* close */
+#define IN_MOVE			(IN_MOVED_FROM | IN_MOVED_TO) /* moves */
+
+/* special flags */
+#define IN_ONLYDIR		0x01000000	/* only watch the path if it is a directory */
+#define IN_DONT_FOLLOW		0x02000000	/* don't follow a sym link */
+#define IN_MASK_ADD		0x20000000	/* add to the mask of an already existing watch */
+#define IN_ISDIR		0x40000000	/* event occurred against dir */
+#define IN_ONESHOT		0x80000000	/* only send event once */
+
+/*
+ * All of the events - we build the list by hand so that we can add flags in
+ * the future and not break backward compatibility.  Apps will get only the
+ * events that they originally wanted.  Be sure to add new events here!
+ */
+#define IN_ALL_EVENTS	(IN_ACCESS | IN_MODIFY | IN_ATTRIB | IN_CLOSE_WRITE | \
+			 IN_CLOSE_NOWRITE | IN_OPEN | IN_MOVED_FROM | \
+			 IN_MOVED_TO | IN_DELETE | IN_CREATE | IN_DELETE_SELF | \
+			 IN_MOVE_SELF)
+
+#endif	/* _LINUX_INOTIFY_H */