Update ChangeLog for v1.4.1 bug fix release

Signed-off-by: Joachim Nilsson <troglobit@gmail.com>

.gitignore

@@ -1,7 +1,29 @@
-bench
+*~
-test
 *.d
 *.o
-*~
+*.so
-libuev.a
+*.so.*
-libuev.so.1
+*.a
+*.la
+*.lo
+.deps
+.libs
+compile
+config.*
+configure
+depcomp
+install-sh
+libtool
+ltmain.sh
+missing
+stamp-h1
+Makefile
+Makefile.in
+aclocal.m4
+ar-lib
+autom4te.cache
+bench
+test
+libuev*.tar.*
+libuev.pc
+!libuev.pc.in

.travis.yml

@@ -17,11 +17,14 @@ addons:
       name: "troglobit/libuev"
       description: "libuEv | Simple event loop for Linux"
     notification_email: troglobit@gmail.com
-    build_command: "make"
+    build_command_prepend: "./autogen && ./configure --enable-examples"
+    build_command: "make clean all"
     branch_pattern: dev
 
 # We don't use configure, so we must define our own build script.
 script:
-  - make distclean
+  - ./autogen.sh
+  - ./configure --disable-silent-rules --enable-examples
+  - make clean
   - make -j5
   - make test

ChangeLog

@@ -1 +0,0 @@
-ChangeLog.md

ChangeLog.md

@@ -3,8 +3,68 @@ Change Log
 
 All notable changes to the project are documented in this file.
 
-[v1.2.3] - 2015-09-17
+
----------------------
+[v1.4.1][] - 2016-04-22
+-----------------------
+
+### Changes
+- Add some `pkg-config` integration tips for developers using libuEv
+  with GNU autotools in their projects.
+
+### Fixes
+- Add missing `SFD_CLOEXEC` and `TFD_CLOEXEC` to signal and timer file
+  descriptors.  This prevents these file descriptors from "leaking" into
+  sub-processes of the parent thread.  The kernel will atomically close
+  these descriptors for forked-off children calling the exec*() family
+  of syscalls.
+- Minor coding style fixes and simplification of build scripts.
+
+
+[v1.4.0][] - 2016-03-22
+-----------------------
+
+This release changes the header file namespace, which was silently
+introduced in [v1.2.1][].  Apologies for any problems this may cause!
+
+### Changes
+- Change namespace for header files: `libuev/` to `uev/`, e.g. using
+  `pkg-config` your C program must now `#include <uev/uev.h>`
+- Support for `EPOLLPRI` events for I/O watchers, thanks to Markus Svilans
+- Simplified joystick example
+- Updated `README` slightly
+
+
+[v1.3.1][] - 2016-02-02
+-----------------------
+
+### Fixes
+- Remove symlinks to Markdown files from GIT
+- Distribute and install Markdown files: README.md, etc.
+
+
+[v1.3.0][] - 2016-01-22
+-----------------------
+
+### Changes
+- Change to GNU configure and build system
+- Default optimization is now `-O2`, not `-Os`, which can be a bit
+  unpredictable with some cross compiler toolchains.  `-O2` is the
+  tried and tested path, and default in autotools
+- Added `-Wextra` to the previous `-W -Wall`, drop `-Werror`
+  which is supposed to be used by maintainer(s) only.
+
+
+[v1.2.4][] - 2015-11-23
+-----------------------
+
+### Fixes
+
+- Do not allow `VERSION` to be overloaded by build system.
+- Make sure we don't inherit `LDFLAGS` from environment.
+
+
+[v1.2.3][] - 2015-09-17
+-----------------------
 
 Very minor release.
 
@@ -19,8 +79,8 @@ Very minor release.
 - Silence annoying warning from newer GNU ar in Ubuntu 15.10
 
 
-[v1.2.2] - 2015-08-30
+[v1.2.2][] - 2015-08-30
----------------------
+-----------------------
 
 Minor bugfix release.
 
@@ -35,15 +95,15 @@ Minor bugfix release.
 - Fix issue #6: Segfault when stopping timer before calling `uev_exit()`
 
 
-[v1.2.1] - 2015-07-02
+[v1.2.1][] - 2015-07-02
----------------------
+-----------------------
 
 ### Changes
 - Private data members in `uev.h` have now been moved to a new file
   called `private.h`.  This will hopefully make it easier to understand
   what a user of libuEv is allowed to play around with.  Thanks to @vonj
   for the discussions around this!
-- All builds of libuEv now default to use -fPIC, this bloats the code
+- All builds of libuEv now default to use `-fPIC`, this bloats the code
   slightly, but ensures that linking works for all use cases, withouth
   introducing unnecessary complexity.
 
@@ -55,8 +115,8 @@ Minor bugfix release.
   should use.  Thank you @vonj!
 
 
-[v1.2.0] - 2015-06-09
+[v1.2.0][] - 2015-06-09
----------------------
+-----------------------
 
 API change in event callbacks and fix timers that never start.
 
@@ -65,12 +125,12 @@ API change in event callbacks and fix timers that never start.
   change!  Please update all your callbacks if you upgrade.
 
 ### Fixes
-- Fix timers that accidentally broke in [v1.1.0].
+- Fix timers that accidentally broke in [v1.1.0][].
 - Fixes to `bench.c`, it now actually listens to the pipe/socket.
 
 
-[v1.1.0] - 2015-03-04
+[v1.1.0][] - 2015-03-04
----------------------
+-----------------------
 
 Massively improved error handling.
 
@@ -87,11 +147,11 @@ Massively improved error handling.
 - Remove `test.c` from `DISTFILES` in `Makefile`.  You need the
   comeplete sources to build the examples now.  Thanks to @karasz for
   the heads up on this and the musl libc issue with missing `queue.h`!
-- Fix broken link to [v1.0.5] in this file.
+- Fix broken link to [v1.0.5][] in this file.
 
 
-[v1.0.5] - 2015-02-15
+[v1.0.5][] - 2015-02-15
----------------------
+-----------------------
 
 ### Changes
 - Add `uev_*_start()` functions.
@@ -105,8 +165,8 @@ Massively improved error handling.
 - Further updates to [README.md][]
 
 
-[v1.0.4] - 2015-01-24
+[v1.0.4][] - 2015-01-24
----------------------
+-----------------------
 
 Minor documentation and build fixes.
 
@@ -118,8 +178,8 @@ Release mainly targeted for [Finit development](https://github.com/troglobit/fin
 * Minor update to Makefile, change how build progress is echoed
 
 
-[v1.0.3] - 2015-01-24
+[v1.0.3][] - 2015-01-24
----------------------
+-----------------------
 
 This is a very minor release, with a strong focus on documentation. 
 
@@ -131,25 +191,25 @@ This is a very minor release, with a strong focus on documentation.
 - Clang scan-build support added
 
 
-[v1.0.2] - 2015-01-07
+[v1.0.2][] - 2015-01-07
----------------------
+-----------------------
 
 ### Fixes
-- Fix broken `make dist` target in [v1.0.1].
+- Fix broken `make dist` target in [v1.0.1][].
 
 
-[v1.0.1] - 2015-01-07
+[v1.0.1][] - 2015-01-07
----------------------
+-----------------------
 
 ### Changes
 - Cleanup and rewrite of [README.md][] after first audit by @vonj
 - Added API and example section to [README.md][]
-- New [joystick.c] example added
+- New [joystick.c][] example added
 - `main.c:uev_run()`: Document mysterious flags parameter
 
 
-[v1.0.0] - 2013-08-06
+[v1.0.0][] - 2013-08-06
----------------------
+-----------------------
 
 First release in the new guise and API.
 
@@ -173,7 +233,10 @@ v0.0.1 - 2012-03-17
 Lua users mailing list.
 
 
-[UNRELEASED]: https://github.com/troglobit/libuev/compare/v1.2.3...HEAD
+[UNRELEASED]: https://github.com/troglobit/libuev/compare/v1.4.0...HEAD
+[v1.4.0]: https://github.com/troglobit/libuev/compare/v1.3.1...v1.4.0
+[v1.3.1]: https://github.com/troglobit/libuev/compare/v1.3.0...v1.3.1
+[v1.3.0]: https://github.com/troglobit/libuev/compare/v1.2.3...v1.3.0
 [v1.2.3]: https://github.com/troglobit/libuev/compare/v1.2.2...v1.2.3
 [v1.2.2]: https://github.com/troglobit/libuev/compare/v1.2.1...v1.2.2
 [v1.2.1]: https://github.com/troglobit/libuev/compare/v1.2.0...v1.2.1

LICENSE

@@ -1,5 +1,5 @@
 Copyright (c) 2012       Flemming Madsen <flemming!madsen()madsensoft!dk>
-Copyright (c) 2013-2015  Joachim Nilsson <troglobit()gmail!com>
+Copyright (c) 2013-2016  Joachim Nilsson <troglobit()gmail!com>
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal

Makefile

@@ -1,151 +0,0 @@
-# libuEv -- Simple event loop for Linux
-#
-# Copyright (c) 2012       Flemming Madsen <flemming!madsen()madsensoft!dk>
-# Copyright (c) 2013-2015  Joachim Nilsson <troglobit()gmail!com>
-#
-# Permission is hereby granted, free of charge, to any person obtaining a copy
-# of this software and associated documentation files (the "Software"), to deal
-# in the Software without restriction, including without limitation the rights
-# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
-# copies of the Software, and to permit persons to whom the Software is
-# furnished to do so, subject to the following conditions:
-#
-# The above copyright notice and this permission notice shall be included in
-# all copies or substantial portions of the Software.
-#
-# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL THE
-# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
-# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
-# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
-# THE SOFTWARE.
-#
-.PHONY: all test clean joystick test examples bench
-
-# Figure out root of library, unless used as submodule
-ROOTDIR    ?= $(shell pwd)
-
-#VERSION    = $(shell git tag -l | tail -1)
-VERSION    ?= 1.2.3
-NAME        = libuev
-PKG         = $(NAME)-$(VERSION)
-ARCHIVE     = $(PKG).tar.xz
-
-CC         ?= $(CROSS)gcc
-AR         ?= $(CROSS)ar
-STRIP      ?= $(CROSS)strip
-MAKE       := @$(MAKE)
-INSTALL    := install --backup=off
-STRIPINST  := $(INSTALL) -s --strip-program=$(CROSS)strip -m 0755
-
-CFLAGS     += -fPIC
-CFLAGS     += -Os
-CPPFLAGS   += -W -Wall -Werror
-ARFLAGS     = crus
-MAKEFLAGS   = --no-print-directory --silent
-
-DISTFILES   = README ChangeLog LICENSE
-HEADERS     = uev.h private.h queue.h
-OBJS       := uev.o io.o timer.o signal.o
-SRCS       := $(OBJS:.o=.c)
-DEPS       := $(SRCS:.c=.d)
-JUNK        = *~ *.bak *.map .*.d *.so* *.a DEADJOE *.gdb *.elf core core.* *.html
-
-VER         = 1
-LIBNAME     = $(NAME)
-SOLIB       = $(LIBNAME).so.$(VER)
-SYMLIB      = $(LIBNAME).so
-STATICLIB   = $(LIBNAME).a
-TARGET      = $(STATICLIB) $(SOLIB)
-
-# Default install paths
-prefix     ?= /usr/local
-libdir     ?= $(prefix)/lib
-datadir    ?= $(prefix)/share/doc/$(LIBNAME)
-incdir     ?= $(prefix)/include
-
-export STATICLIB JUNK ROOTDIR CFLAGS CPPFLAGS
-
-# This magic trick looks like a comment, but works on BSD PMake
-#include <rules.mk>
-include rules.mk
-
-# Build rules
-all: $(TARGET)
-
-$(OBJS): Makefile
-
-$(SOLIB): Makefile $(OBJS)
-	@printf "  LINK    $@\n"
-	@$(CC) $(LDFLAGS) -shared -Wl,-soname=$@ -o $@ $(OBJS)
-
-$(STATICLIB): Makefile $(OBJS)
-	@printf "  ARCHIVE $@\n"
-	@$(AR) $(ARFLAGS) $@ $(OBJS) 2>/dev/null
-
-install-exec: all
-	@printf "  INSTALL $(DESTDIR)$(libdir)/$(SOLIB)\n"
-	@install -d $(DESTDIR)$(libdir)
-	@install $(SOLIB) $(DESTDIR)$(libdir)/$(SOLIB)
-	@ln -sf $(SOLIB) $(DESTDIR)$(libdir)/$(SYMLIB)
-
-install-dev:
-	@install -d $(DESTDIR)$(incdir)/$(LIBNAME)
-	@for file in $(HEADERS); do						\
-		printf "  INSTALL $(DESTDIR)$(incdir)/$(LIBNAME)/$$file\n";	\
-		install -m 0644 $$file $(DESTDIR)$(incdir)/$(LIBNAME)/$$file;	\
-	done
-	@printf "  INSTALL $(DESTDIR)$(libdir)/$(STATICLIB)\n"
-	@install -d $(DESTDIR)$(libdir)
-	@install $(STATICLIB) $(DESTDIR)$(libdir)/$(STATICLIB)
-	@install -d $(DESTDIR)$(datadir)
-	@for file in $(DISTFILES); do					\
-		printf "  INSTALL $(DESTDIR)$(datadir)/$$file\n";	\
-		install -m 0644 $$file $(DESTDIR)$(datadir)/$$file;	\
-	done
-
-install: install-exec install-dev
-
-uninstall:
-	-@$(RM) -r $(DESTDIR)$(datadir)
-	-@$(RM) -r $(DESTDIR)$(incdir)/$(LIBNAME)
-	-@$(RM) $(DESTDIR)$(libdir)/$(SOLIB)
-	-@$(RM) $(DESTDIR)$(libdir)/$(SYMLIB)
-	-@$(RM) $(DESTDIR)$(libdir)/$(STATICLIB)
-
-strip: $(TARGET)
-	@printf "  STRIP   %s\n" $(TARGET)
-	@$(STRIP) --strip-unneeded $(TARGET)
-	@size $(TARGET)
-
-bench: Makefile $(STATICLIB)
-	@printf "  RUN     %s\n" $@
-	@$(CC) $(CPPFLAGS) -D_GNU_SOURCE -g -o bench bench.c $(STATICLIB) && ./bench
-
-examples: all
-	@$(MAKE) -C examples
-
-test joystick: all
-	@$(MAKE) -C examples $@
-	@./examples/$@
-
-# Runs Clang scan-build on the whole tree
-check: clean
-	@scan-build $(MAKE) all
-
-clean:
-	-@$(MAKE) -C examples $@
-	-@$(RM) $(TARGET) *.o test joystick bench
-
-distclean: clean
-	-@$(MAKE) -C examples $@
-	-@$(RM) $(DEPS) $(JUNK)
-
-dist:
-	@echo "Building .xz tarball of $(PKG) in parent dir..."
-	git archive --format=tar --prefix=$(PKG)/ v$(VERSION) | xz >../$(ARCHIVE)
-	@(cd ..; md5sum $(ARCHIVE) | tee $(ARCHIVE).md5)
-
-# Include automatically generated rules
--include $(DEPS)

Makefile.am

@@ -0,0 +1,69 @@
+ACLOCAL_AMFLAGS     = -I m4
+
+lib_LTLIBRARIES     = libuev.la
+pkgincludedir       = $(includedir)/uev
+pkginclude_HEADERS  = uev.h private.h queue.h
+libuev_la_SOURCES   = uev.c io.c timer.c signal.c
+
+check_PROGRAMS      = bench
+bench_CPPFLAGS      = -D_GNU_SOURCE
+bench_LDADD         = $(top_srcdir)/libuev.la
+
+libuev_la_CPPFLAGS  = -D_GNU_SOURCE
+libuev_la_CFLAGS    = -W -Wall -Wextra
+libuev_la_LDFLAGS   = $(AM_LDFLAGS) -version-info 1:1:0
+
+pkgconfigdir        = $(libdir)/pkgconfig
+pkgconfig_DATA      = libuev.pc
+doc_DATA            = README.md LICENSE
+EXTRA_DIST          = README.md LICENSE AUTHORS ChangeLog.md
+
+DIST_SUBDIRS        = examples
+SUBDIRS             = .
+if ENABLE_EXAMPLES
+  SUBDIRS          += examples
+endif
+
+test joystick: all-recursive
+	./examples/$@
+
+check-local:
+	@echo "  BENCH    $(PACKAGE)"
+	@./bench
+if ENABLE_EXAMPLES
+	@echo "  TEST     $(PACKAGE)"
+	@./examples/test
+endif
+
+## Generate MD5 checksum file
+MD5 = md5sum
+md5-dist:
+	@for file in $(DIST_ARCHIVES); do	\
+		$(MD5) $$file > $$file.md5;	\
+	done
+
+## Check if tagged in git
+release-hook:
+	if [ ! `git tag | grep $(PACKAGE_VERSION)` ]; then				\
+		echo;									\
+		printf "\e[1m\e[41mCannot find release tag $(PACKAGE_VERSION)\e[0m\n";	\
+		printf "\e[1m\e[5mDo release anyway?\e[0m "; read yorn;			\
+		if [ "$$yorn" != "y" -a "$$yorn" != "Y" ]; then				\
+			printf "OK, aborting release.\n";				\
+			exit 1;								\
+		fi;									\
+		echo;									\
+	else										\
+		echo;									\
+		printf "\e[1m\e[42mFound GIT release tag $(PACKAGE_VERSION)\e[0m\n";	\
+		printf "\e[1m\e[44m>>Remember to push tags!\e[0m\n";			\
+		echo;									\
+	fi
+
+## Target to run when building a release
+release: dist release-hook md5-dist
+	@for file in $(DIST_ARCHIVES); do						\
+		printf "$$file    \tDistribution tarball\n";				\
+		printf "$$file.md5\t"; cat $$file.md5 | cut -f1 -d' ';			\
+		mv $$file* ../;								\
+	done

README

@@ -1 +0,0 @@
-README.md

README.md

@@ -12,6 +12,7 @@ Table of Contents
   * [Register an Event Watcher](#register-an-event-watcher)
   * [Start Event Loop](#start-event-loop)
   * [Summary](#summary)
+* [Using -luev](#using--luev)
 * [Joystick Example](#joystick-example)
 * [Build & Install](#build--install)
 * [Origin & References](#origin--references)
@@ -59,19 +60,21 @@ modern Linux APIs: epoll, timerfd and signalfd.  Note, a certain amount
 of care is needed when dealing with APIs that employ signalfd.  For
 details, see [this article][4] at [lwn.net](http://lwn.net).
 
-> “Event driven software improves concurrency” -- [Dave Zarzycki, Apple]
+> “Event driven software improves concurrency” -- [Dave Zarzycki, Apple][]
 
 
 API
 ---
 
-The C interface to [libuEv][] is very simple.  It handles three different
+The C interface to [libuEv][] is listed in `uev.h`.  It handles three
-types of events: I/O (files, sockets, message queues, etc.), timers, and
+different types of events: I/O (files, sockets, message queues, etc.),
-signals.  With a slight caveat on signals
+timers, and signals.  With a slight caveat on signals detailed below
+in the [Summary](#summary).
 
 ```C
 
-    /* Callback example, arg is passed from watcher's *_init()
+    /*
+     * Callback example, arg is passed from watcher's *_init()
      * w->fd holds the file descriptor, events is set by libuEv
      * to indicate if any of UEV_READ and/or UEV_WRITE is ready.
      */
@@ -102,6 +105,7 @@ signals.  With a slight caveat on signals
 
 ```
 
+
 ### Create an Event Context
 
 To monitor events the developer first creates an *event context*, this
@@ -116,13 +120,13 @@ is achieved by calling `uev_init()` with a pointer to a (thread) local
 
 ```
 
+
 ### Register an Event Watcher
 
-For each event to be monitored, be it a signal, timer or a file
+For each event to monitor, be it a signal, timer or file descriptor, a
-descriptor, a *watcher* must be registered with the event context.  The
+*watcher* must be registered with the event context.  The watcher, an
-watcher, an `uev_t`, is registered by calling the event type's `_init()`
+`uev_t`, is registered by calling the event type's `_init()` function
-function with the `uev_ctx_t` context, the callback, and an optional
+with the `uev_ctx_t` context, the callback, and an optional argument.
-argument.
 
 Here is a signal example:
 
@@ -148,6 +152,7 @@ Here is a signal example:
 
 ```
 
+
 ### Start Event Loop
 
 When all watchers are registered, call the *event loop* with `uev_run()`
@@ -187,20 +192,46 @@ opened in blocking mode.  Be careful out there!
   effects on your program.
 
 **Note 3:** As mentioned above, a certain amount of care is needed when
-dealing with signalfd.  This means that if your application, for
+dealing with signalfd.  If your application use `system()` you replace
-instance, uses `system()` you must redesign that to use `fork()`, and
+that with `fork()`, and then in the child, unblock all signals blocked
-then in the child, unblock all signals blocked by your parent process,
+by your parent process, before you run `exec()`.  This because Linux
-before you run `exec()`.  This because Linux does not unblock signals
+does not unblock signals for your children, and neither does most (all?)
-for your children, and neither does most (all?) C-libraries.  An example
+C-libraries.  See the [finit][6] project's implementation of `run()` for
-of this, from [finit][6], implementing `run()` as a better replacement
+an example of this.
-to `system()`, which sucks anyawy :)
+
+
+Using -luev
+-----------
+
+LibuEv is by default installed as a library with a few header files, you
+should only ever need to include one:
+
+    #include <uev/uev.h>
+
+The output from the `pkg-config` tool holds no surprises:
+
+    $ pkg-config --libs --static --cflags libuev
+    -I/usr/local/include -L/usr/local/lib -luev
+
+The prefix path `/usr/local/` shown here is only the default.  Use the
+`configure` script to select a different prefix when installing libuEv.
+
+For GNU autotools based projects, use the following in `configure.ac`:
+
+    # Check for required libraries
+    PKG_CHECK_MODULES([uev], [libuev >= 1.4.0])
+
+and in your `Makefile.am`:
+
+    proggy_CFLAGS = $(uev_CFLAGS)
+    proggy_LDADD  = $(uev_LIBS)
 
 
 Joystick Example
 ----------------
 
-Here follows a very brief example to illustrate how one can use
+Here follows a very brief example to illustrate how one can use libuEv
-[libuEv][] to act upon joystick input.
+to act upon joystick input.
 
 ```C
 
@@ -210,59 +241,61 @@ Here follows a very brief example to illustrate how one can use
     #include <stdint.h>
     #include <fcntl.h>
     #include <unistd.h>
-    
+    #include <uev/uev.h>
-    #include "uev.h"
     
     struct js_event {
-    	uint32_t time;		/* event timestamp in milliseconds */
+        uint32_t time;      /* event timestamp in milliseconds */
-    	int16_t  value;		/* value */
+        int16_t  value;     /* value */
-    	uint8_t  type;		/* event type */
+        uint8_t  type;      /* event type */
-    	uint8_t  number;	/* axis/button number */
+        uint8_t  number;    /* axis/button number */
     } e;
     
     static void joystick_cb(uev_t *w, void *arg, int events)
     {
-    	read (w->fd, &e, sizeof(e));
+        read(w->fd, &e, sizeof(e));
     
-    	switch (e.type) {
+        switch (e.type) {
-    	case 1:
+        case 1:
-    		if (e.value) printf("Button %d pressed\n", e.number);
+            printf("Button %d %s\n", e.number, e.value ? "pressed" : "released");
-    		else 	     printf("Button %d released\n", e.number);
+            break;
-    		break;
     
-    	case 2:
+        case 2:
-    		printf("Joystick axis %d moved, value %d!\n", e.number, e.value);
+            printf("Joystick axis %d moved, value %d!\n", e.number, e.value);
-    		break;
+            break;
-    	}
+        }
     }
     
     int main(void)
     {
-    	int       fd = open("/dev/input/js1", O_RDONLY, O_NONBLOCK);
+        int fd;
-    	uev_t     js1_watcher;
+        uev_t watcher;
-    	uev_ctx_t ctx;
+        uev_ctx_t ctx;
     
-    	if (fd < 0)
+        fd = open("/dev/input/js1", O_RDONLY, O_NONBLOCK);
-    		errx(errno, "Cannot find a joystick attached.");
+        if (fd < 0)
+            errx(errno, "Cannot find a joystick attached.");
     
-    	uev_init(&ctx);
+        uev_init(&ctx);
-    	uev_io_init(&ctx, &js1_watcher, joystick_cb, NULL, fd, UEV_READ);
+        uev_io_init(&ctx, &watcher, joystick_cb, NULL, fd, UEV_READ);
     
-    	puts("Starting, press Ctrl-C to exit.");
+        puts("Starting, press Ctrl-C to exit.");
     
-    	return uev_run(&ctx, 0);
+        return uev_run(&ctx, 0);
     }
 
 ```
 
-To compile the program, save the code as `joystick.c` and call GCC with
+To build the example, follow installation instructions below, then save
-`gcc -o joystick joystick.c io.c timer.c signal.c main.c` from this
+the code as `joystick.c` and call GCC
-directory, skips using a Makefile altogether.  Alternatively, call the
-`Makefile` with <kbd>make joystick</kbd> from this directory.
 
-More complete and relevant example uses of [libuEv][] is the TFTP/FTP
+    gcc `pkg-config --libs --static --cflags libuev` -o joystick joystick.c
+
+Alternatively, call the `Makefile` with <kbd>make joystick</kbd> from
+the unpacked [libuEv][] distribution.
+
+More complete and relevant example uses of [libuEv][] is the FTP/TFTP
 server [uftpd][5], and the Linux `/sbin/init` replacement [finit][6].
-Both use [libuEv][] as a GIT submodule.
+Both successfully employ [libuEv][].
 
 Also see the `bench.c` program (<kbd>make bench</kbd> from within the
 library) for [reference benchmarks][7] against [libevent][1] and
@@ -272,38 +305,24 @@ library) for [reference benchmarks][7] against [libevent][1] and
 Build & Install
 ---------------
 
-The library is built for and developed on GNU/Linux systems, so it may
+The library is built for and developed on GNU/Linux systems, patches to
-use GCC and GNU Make specific extensions here and there.  This is not on
+support *BSD and its kqueue interface are most welcome.
-purpose and patches to correct this are most welcome.  Particularly
-patches to support *BSD and its kqueue interface.
 
-* <kbd>make all</kbd>: The library
+libuEv use the GNU configure and build system.  To try out the bundled
-* <kbd>make test</kbd>: Test and showcase
+examples, use the `--enable-examples` switch to the `configure` script.
-* <kbd>make install</kbd>: Honors `$prefix` and `$DESTDIR` environment variables
 
-Size of [libuEv][]:
+    ./configure
+    make all
+    make test
+    make install
 
-    $ make strip
+The resulting .so file is ~14 kiB (<kbd>make install-strip</kbd>).
-    CC      main.o
-    CC      io.o
-    CC      timer.o
-    CC      signal.o
-    ARCHIVE libuev.a
-    LINK    libuev.so.1
-    STRIP   libuev.a
-    STRIP   libuev.so.1
-    text	   data	    bss	    dec	    hex	filename
-    1177	      0	      0	   1177	    499	main.o     (ex libuev.a)
-     308	      0	      0	    308	    134	io.o       (ex libuev.a)
-     682	      0	      0	    682	    2aa	timer.o    (ex libuev.a)
-     563	      0	      0	    563	    233	signal.o   (ex libuev.a)
-    6306	    768	      8	   7082	   1baa	libuev.so.1
 
 
 Origin & References
---------------------
+-------------------
 
-[libuEv][] was originally based on [LibUEvent][8] by [Flemming Madsen]
+[libuEv][] was originally based on [LibUEvent][8] by [Flemming Madsen][]
 but has been completely rewritten with a much clearer API.  Now more
 similar to the famous [libev][2] by [Mark Lehmann][].  Another small
 event library used for inspiration is the very small [Picoev][9] by

TODO

@@ -1 +0,0 @@
-TODO.md

autogen.sh

@@ -0,0 +1,3 @@
+#!/bin/sh
+
+autoreconf -W portability -visfm

bench.c

@@ -229,7 +229,6 @@ int main(int argc, char **argv)
 
 /**
  * Local Variables:
- *  version-control: t
  *  indent-tabs-mode: t
  *  c-file-style: "linux"
  * End:

configure.ac

@@ -0,0 +1,19 @@
+AC_INIT(libuev, 1.4.1, https://github.com/troglobit/libuev/issues)
+AM_INIT_AUTOMAKE([1.11 foreign no-dist-gzip dist-xz])
+AM_SILENT_RULES([yes])
+
+AC_CONFIG_SRCDIR(uev.c)
+AM_CONFIG_HEADER(config.h)
+AC_CONFIG_FILES([Makefile libuev.pc examples/Makefile])
+AC_CONFIG_MACRO_DIR([m4])
+
+AC_PROG_CC
+AM_PROG_AR
+LT_INIT
+
+AC_ARG_ENABLE([examples],
+	[AS_HELP_STRING([--enable-examples], [build examples])],
+	[enable_examples=yes], [])
+AM_CONDITIONAL([ENABLE_EXAMPLES], [test "$enable_examples" = yes])
+
+AC_OUTPUT

examples/Makefile

@@ -1,54 +0,0 @@
-# libuEv examples
-#
-# Copyright (c) 2012       Flemming Madsen <flemming!madsen()madsensoft!dk>
-# Copyright (c) 2013-2015  Joachim Nilsson <troglobit()gmail!com>
-#
-# Permission is hereby granted, free of charge, to any person obtaining
-# a copy of this software and associated documentation files (the
-# "Software"), to deal in the Software without restriction, including
-# without limitation the rights to use, copy, modify, merge, publish,
-# distribute, sublicense, and/or sell copies of the Software, and to
-# permit persons to whom the Software is furnished to do so, subject to
-# the following conditions:
-#
-# The above copyright notice and this permission notice shall be
-# included in all copies or substantial portions of the Software.
-#
-# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
-# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
-# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
-# IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
-# CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
-# TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
-# SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
-#
-.PHONY: all clean
-
-TARGET      = signal test joystick
-OBJS       := $(addsuffix .o, $(TARGET))
-SRCS       := $(OBJS:.o=.c)
-DEPS       := $(SRCS:.c=.d)
-CPPFLAGS   += -I../
-LDFLAGS    := -L../
-LDLIBS     := ../$(STATICLIB)
-
-# This magic trick looks like a comment, but works on BSD PMake
-#include <../rules.mk>
-include ../rules.mk
-
-all: $(TARGET)
-
-signal: signal.o
-
-test: test.o
-
-joystick: joystick.o
-
-clean:
-	-@$(RM) $(TARGET) *.o
-
-distclean: clean
-	-@$(RM) $(DEPS) $(JUNK)
-
-# Include automatically generated rules
--include $(DEPS)

examples/Makefile.am

@@ -0,0 +1,5 @@
+noinst_PROGRAMS = signal test joystick
+AM_CPPFLAGS     = -I$(top_srcdir)
+AM_LDFLAGS      = -L$(top_srcdir)
+LIBS            = $(LTLIBINTL)
+LDADD           = $(top_srcdir)/libuev.la

examples/joystick.c

@@ -1,6 +1,6 @@
 /* Simple example of how to use libuEv with Linux joystick API
  *
- * Copyright (c) 2014-2015  Joachim Nilsson <troglobit()gmail!com>
+ * Copyright (c) 2014-2016  Joachim Nilsson <troglobit()gmail!com>
  *
  * Permission is hereby granted, free of charge, to any person obtaining a copy
  * of this software and associated documentation files (the "Software"), to deal
@@ -30,8 +30,6 @@
 
 #include "uev.h"
 
-#define UNUSED(arg) arg __attribute__ ((unused))
-
 struct js_event {
 	uint32_t time;		/* event timestamp in milliseconds */
 	int16_t  value;		/* value */
@@ -39,15 +37,14 @@ struct js_event {
 	uint8_t  number;	/* axis/button number */
 } e;
 
-static void joystick_cb(uev_t *w, void *UNUSED(arg), int UNUSED(events))
+static void joystick_cb(uev_t *w, void *arg, int events)
 {
-	if (read (w->fd, &e, sizeof(e)) < 0)
+	if (read(w->fd, &e, sizeof(e)) < 0)
 		errx(errno, "Failed reading joystick event");
 
 	switch (e.type) {
 	case 1:
-		if (e.value) printf("Button %d pressed\n", e.number);
+		printf("Button %d %s\n", e.number, e.value ? "pressed" : "released");
-		else 	     printf("Button %d released\n", e.number);
 		break;
 
 	case 2:
@@ -58,10 +55,11 @@ static void joystick_cb(uev_t *w, void *UNUSED(arg), int UNUSED(events))
 
 int main(void)
 {
-	int       fd = open("/dev/input/js1", O_RDONLY, O_NONBLOCK);
+	int fd;
-	uev_t     js1_watcher;
+	uev_t js1_watcher;
 	uev_ctx_t ctx;
 
+	fd = open("/dev/input/js1", O_RDONLY, O_NONBLOCK);
 	if (fd < 0)
 		errx(errno, "Cannot find a joystick attached.");
 
@@ -75,8 +73,7 @@ int main(void)
 
 /**
  * Local Variables:
- *  compile-command: "gcc -o joystick joystick.c io.o timer.o signal.o main.o"
+ *  compile-command: "make joystick"
- *  version-control: t
  *  indent-tabs-mode: t
  *  c-file-style: "linux"
  * End:

examples/signal.c

@@ -134,7 +134,6 @@ int main(void)
 
 /**
  * Local Variables:
- *  version-control: t
  *  indent-tabs-mode: t
  *  c-file-style: "linux"
  * End:

examples/test.c

@@ -146,7 +146,6 @@ int main(void)
 
 /**
  * Local Variables:
- *  version-control: t
  *  indent-tabs-mode: t
  *  c-file-style: "linux"
  * End:

io.c

@@ -1,7 +1,7 @@
 /* libuEv - Micro event loop library
  *
  * Copyright (c) 2012       Flemming Madsen <flemming!madsen()madsensoft!dk>
- * Copyright (c) 2013-2015  Joachim Nilsson <troglobit()gmail!com>
+ * Copyright (c) 2013-2016  Joachim Nilsson <troglobit()gmail!com>
  *
  * Permission is hereby granted, free of charge, to any person obtaining a copy
  * of this software and associated documentation files (the "Software"), to deal
@@ -23,7 +23,6 @@
  */
 
 #include <errno.h>
-
 #include "uev.h"
 
 
@@ -34,7 +33,7 @@
  * @param cb      I/O callback
  * @param arg     Optional callback argument
  * @param fd      File descriptor to watch, or -1 to register an empty watcher
- * @param events  Requested events to watch for, a mask of %UEV_READ and %UEV_WRITE
+ * @param events  Requested events to watch for, a mask of %UEV_READ, %UEV_WRITE and %UEV_PRI
  *
  * @return POSIX OK(0) or non-zero with @param errno set on error.
  */
@@ -91,7 +90,6 @@ int uev_io_stop(uev_t *w)
 
 /**
  * Local Variables:
- *  version-control: t
  *  indent-tabs-mode: t
  *  c-file-style: "linux"
  * End:

libuev.pc.in

@@ -0,0 +1,12 @@
+prefix=@prefix@
+exec_prefix=@exec_prefix@
+libdir=@libdir@
+includedir=@includedir@
+
+Name: @PACKAGE@
+Description: Simple event loop for Linux
+Version: @VERSION@
+Requires:
+Libs: -L${libdir} -luev
+Cflags: -I${includedir}
+

m4/.gitignore

@@ -0,0 +1 @@
+*.m4

private.h

@@ -37,7 +37,7 @@ typedef enum {
 } uev_type_t;
 
 /* Event mask, used internally only. */
-#define UEV_EVENT_MASK  (UEV_READ | UEV_WRITE)
+#define UEV_EVENT_MASK  (UEV_READ | UEV_WRITE | UEV_PRI)
 
 /* Main libuEv context type */
 typedef struct {
@@ -82,7 +82,6 @@ int uev_watcher_stop (struct uev *w);
 
 /**
  * Local Variables:
- *  version-control: t
  *  indent-tabs-mode: t
  *  c-file-style: "linux"
  * End:

rules.mk

@@ -1,9 +0,0 @@
-# Pretty printing and GCC -M for auto dep files
-%.o: %.c
-	@printf "  CC      $(subst $(ROOTDIR)/,,$(shell pwd)/)$@\n"
-	@$(CC) $(CFLAGS) $(CPPFLAGS) -c -MMD -MP -o $@ $<
-
-%: %.o
-	@printf "  LINK    $(subst $(ROOTDIR)/,,$(shell pwd)/)$@\n"
-	@$(CC) $(CFLAGS) $(LDFLAGS) -Wl,-Map,$@.map -o $@ $^ $(LDLIBS$(LDLIBS-$(@)))
-

signal.c

@@ -1,7 +1,7 @@
 /* libuEv - Micro event loop library
  *
  * Copyright (c) 2012       Flemming Madsen <flemming!madsen()madsensoft!dk>
- * Copyright (c) 2013-2015  Joachim Nilsson <troglobit()gmail!com>
+ * Copyright (c) 2013-2016  Joachim Nilsson <troglobit()gmail!com>
  *
  * Permission is hereby granted, free of charge, to any person obtaining a copy
  * of this software and associated documentation files (the "Software"), to deal
@@ -52,7 +52,7 @@ int uev_signal_init(uev_ctx_t *ctx, uev_t *w, uev_cb_t *cb, void *arg, int signo
 	w->fd = -1;
 
 	sigemptyset(&mask);
-	fd = signalfd(-1, &mask, SFD_NONBLOCK);
+	fd = signalfd(-1, &mask, SFD_NONBLOCK | SFD_CLOEXEC);
 	if (fd < 0)
 		return -1;
 
@@ -151,7 +151,6 @@ int uev_signal_stop(uev_t *w)
 
 /**
  * Local Variables:
- *  version-control: t
  *  indent-tabs-mode: t
  *  c-file-style: "linux"
  * End:

timer.c

@@ -1,7 +1,7 @@
 /* libuEv - Micro event loop library
  *
  * Copyright (c) 2012       Flemming Madsen <flemming!madsen()madsensoft!dk>
- * Copyright (c) 2013-2015  Joachim Nilsson <troglobit()gmail!com>
+ * Copyright (c) 2013-2016  Joachim Nilsson <troglobit()gmail!com>
  *
  * Permission is hereby granted, free of charge, to any person obtaining a copy
  * of this software and associated documentation files (the "Software"), to deal
@@ -67,7 +67,7 @@ int uev_timer_init(uev_ctx_t *ctx, uev_t *w, uev_cb_t *cb, void *arg, int timeou
 {
 	int fd;
 
-	fd = timerfd_create(CLOCK_MONOTONIC, TFD_NONBLOCK);
+	fd = timerfd_create(CLOCK_MONOTONIC, TFD_NONBLOCK | TFD_CLOEXEC);
 	if (fd < 0)
 		return -1;
 
@@ -169,7 +169,6 @@ int uev_timer_stop(uev_t *w)
 
 /**
  * Local Variables:
- *  version-control: t
  *  indent-tabs-mode: t
  *  c-file-style: "linux"
  * End:

uev.c

@@ -1,7 +1,7 @@
 /* libuEv - Micro event loop library
  *
  * Copyright (c) 2012       Flemming Madsen <flemming!madsen()madsensoft!dk>
- * Copyright (c) 2013-2015  Joachim Nilsson <troglobit()gmail!com>
+ * Copyright (c) 2013-2016  Joachim Nilsson <troglobit()gmail!com>
  *
  * Permission is hereby granted, free of charge, to any person obtaining a copy
  * of this software and associated documentation files (the "Software"), to deal
@@ -36,8 +36,9 @@
 
 static int _init(uev_ctx_t *ctx, int close_old)
 {
-	int fd = epoll_create1(EPOLL_CLOEXEC);
+	int fd;
 
+	fd = epoll_create1(EPOLL_CLOEXEC);
 	if (fd < 0)
 		return -1;
 
@@ -311,10 +312,8 @@ int uev_run(uev_ctx_t *ctx, int flags)
 	return result;
 }
 
-
 /**
  * Local Variables:
- *  version-control: t
  *  indent-tabs-mode: t
  *  c-file-style: "linux"
  * End:

uev.h

@@ -34,6 +34,7 @@
 #define UEV_NONE        0
 #define UEV_READ        EPOLLIN
 #define UEV_WRITE       EPOLLOUT
+#define UEV_PRI         EPOLLPRI
 
 /* Run flags */
 #define UEV_ONCE        1
@@ -76,7 +77,6 @@ int uev_signal_stop    (uev_t *w);
 
 /**
  * Local Variables:
- *  version-control: t
  *  indent-tabs-mode: t
  *  c-file-style: "linux"
  * End: