commit
bb145f83fb
9 changed files with 486 additions and 0 deletions
-
11.gitignore
-
73CMakeLists.txt
-
22COPYING
-
10Makefile.am
-
24autogen.sh
-
6config.h.cmake
-
57configure.ac
-
40multiwatch.1
-
243multiwatch.c
@ -0,0 +1,11 @@ |
|||
*~ |
|||
*.o |
|||
Makefile.in |
|||
aclocal.m4 |
|||
autom4te.cache |
|||
autoscan.log |
|||
config.h.in |
|||
configure |
|||
depcomp |
|||
install-sh |
|||
missing |
|||
@ -0,0 +1,73 @@ |
|||
CMAKE_MINIMUM_REQUIRED(VERSION 2.6.0 FATAL_ERROR) |
|||
|
|||
cmake_policy(VERSION 2.6.0) |
|||
|
|||
INCLUDE(CheckIncludeFiles) |
|||
INCLUDE(CheckLibraryExists) |
|||
INCLUDE(FindPkgConfig) |
|||
|
|||
MACRO(ADD_TARGET_PROPERTIES _target _name _properties) |
|||
SET(_properties ${ARGV}) |
|||
LIST(REMOVE_AT _properties 0) |
|||
LIST(REMOVE_AT _properties 0) |
|||
GET_TARGET_PROPERTY(_old_properties ${_target} ${_name}) |
|||
#MESSAGE("adding property to ${_target} ${_name}: ${_properties}") |
|||
IF(NOT _old_properties) |
|||
# in case it's NOTFOUND |
|||
SET(_old_properties) |
|||
ELSE(NOT _old_properties) |
|||
SET(_old_properties "${_old_properties} ") |
|||
ENDIF(NOT _old_properties) |
|||
SET_TARGET_PROPERTIES(${_target} PROPERTIES ${_name} "${_old_properties}${_properties}") |
|||
ENDMACRO(ADD_TARGET_PROPERTIES) |
|||
|
|||
PROJECT(multiwatch) |
|||
SET(PACKAGE_VERSION 1.0.0) |
|||
IF("${CMAKE_BUILD_TYPE}" STREQUAL "") |
|||
SET(CMAKE_BUILD_TYPE RelWithDebInfo CACHE STRING "Choose the type of build, options are: None(CMAKE_CXX_FLAGS or CMAKE_C_FLAGS used) Debug Release RelWithDebInfo MinSizeRel." FORCE) |
|||
ENDIF("${CMAKE_BUILD_TYPE}" STREQUAL "") |
|||
|
|||
|
|||
# libev |
|||
CHECK_INCLUDE_FILES(ev.h HAVE_EV_H) |
|||
IF(HAVE_EV_H) |
|||
CHECK_LIBRARY_EXISTS(ev ev_loop "" HAVE_LIBEV) |
|||
IF(HAVE_LIBEV) |
|||
SET(EV_LIBRARIES ev) |
|||
SET(EV_STATIC_LIBRARIES ev;m) |
|||
CHECK_LIBRARY_EXISTS(rt clock_gettime "" NEED_RT) |
|||
IF(NEED_RT) |
|||
SET(EV_STATIC_LIBRARIES ${EV_STATIC_LIBRARIES} rt) |
|||
ENDIF(NEED_RT) |
|||
ELSE(HAVE_LIBEV) |
|||
MESSAGE(FATAL_ERROR "Couldn't find lib ev") |
|||
ENDIF(HAVE_LIBEV) |
|||
ELSE(HAVE_EV_H) |
|||
MESSAGE(FATAL_ERROR "Couldn't find <ev.h>") |
|||
ENDIF(HAVE_EV_H) |
|||
|
|||
# GLIB 2 |
|||
pkg_check_modules (GLIB2 REQUIRED glib-2.0) |
|||
SET(GLIB_INCLUDES ${GLIB2_INCLUDE_DIRS} ${GLIB2_INCLUDE_DIRS}/glib-2.0/ ${GLIB2_INCLUDE_DIRS}/glib-2.0/include/) |
|||
INCLUDE_DIRECTORIES(${GLIB_INCLUDES}) |
|||
|
|||
SET(MAIN_SOURCE multiwatch.c) |
|||
|
|||
SET(PACKAGE_NAME ${CMAKE_PROJECT_NAME}) |
|||
SET(PACKAGE_VERSION ${PACKAGE_VERSION}) |
|||
CONFIGURE_FILE(${CMAKE_CURRENT_SOURCE_DIR}/config.h.cmake ${CMAKE_BINARY_DIR}/config.h ESCAPE_QUOTES) |
|||
ADD_DEFINITIONS(-DHAVE_CONFIG_H) |
|||
INCLUDE_DIRECTORIES(${CMAKE_CURRENT_BINARY_DIR} ${CMAKE_CURRENT_SOURCE_DIR}) |
|||
|
|||
add_executable(multiwatch ${MAIN_SOURCE}) |
|||
|
|||
ADD_TARGET_PROPERTIES(multiwatch COMPILE_FLAGS "-std=gnu99 -Wall -g -Wshadow -W -pedantic -fPIC -D_GNU_SOURCE") |
|||
|
|||
# libev |
|||
TARGET_LINK_LIBRARIES(multiwatch "${EV_LIBRARIES}") |
|||
|
|||
# GLIB 2 |
|||
ADD_TARGET_PROPERTIES(multiwatch LINK_FLAGS "${GLIB2_LDFLAGS}") |
|||
ADD_TARGET_PROPERTIES(multiwatch COMPILE_FLAGS "${GLIB2_CFLAGS_OTHER}") |
|||
|
|||
INSTALL(TARGETS multiwatch DESTINATION bin) |
|||
@ -0,0 +1,22 @@ |
|||
|
|||
The MIT License |
|||
|
|||
Copyright (c) 2008 Stefan Bühler |
|||
|
|||
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. |
|||
@ -0,0 +1,10 @@ |
|||
|
|||
AM_CFLAGS=$(GLIB_CFLAGS) |
|||
multiwatch_LDADD=$(GLIB_LIBS) |
|||
|
|||
EXTRA_DIST=autogen.sh multiwatch.1 CMakeLists.txt config.h.cmake |
|||
man1_MANS=multiwatch.1 |
|||
|
|||
bin_PROGRAMS=multiwatch |
|||
|
|||
multiwatch_SOURCES=multiwatch.c |
|||
@ -0,0 +1,24 @@ |
|||
#!/bin/sh |
|||
# Run this to generate all the initial makefiles, etc. |
|||
|
|||
ACLOCAL=${ACLOCAL:-aclocal} |
|||
AUTOHEADER=${AUTOHEADER:-autoheader} |
|||
AUTOMAKE=${AUTOMAKE:-automake} |
|||
AUTOMAKE_FLAGS="--add-missing --copy" |
|||
AUTOCONF=${AUTOCONF:-autoconf} |
|||
|
|||
ARGV0=$0 |
|||
|
|||
set -e |
|||
|
|||
|
|||
run() { |
|||
echo "$ARGV0: running \`$@'" |
|||
$@ |
|||
} |
|||
|
|||
run $ACLOCAL $ACLOCAL_FLAGS |
|||
run $AUTOHEADER |
|||
run $AUTOMAKE $AUTOMAKE_FLAGS |
|||
run $AUTOCONF |
|||
echo "Now type './configure ...' and 'make' to compile." |
|||
@ -0,0 +1,6 @@ |
|||
/* |
|||
CMake autogenerated config.h file. Do not edit! |
|||
*/ |
|||
|
|||
#define PACKAGE_NAME "${PACKAGE_NAME}" |
|||
#define PACKAGE_VERSION "${PACKAGE_VERSION}" |
|||
@ -0,0 +1,57 @@ |
|||
# -*- Autoconf -*- |
|||
# Process this file with autoconf to produce a configure script. |
|||
|
|||
AC_PREREQ(2.61) |
|||
AC_INIT([multiwatch], [1.0.0], []) |
|||
AC_CONFIG_SRCDIR([multiwatch.c]) |
|||
AC_CONFIG_HEADER([config.h]) |
|||
|
|||
AM_INIT_AUTOMAKE([-Wall -Werror foreign]) |
|||
|
|||
# Checks for programs. |
|||
AC_PROG_CC |
|||
AC_PROG_MAKE_SET |
|||
AC_PROG_INSTALL |
|||
|
|||
# Checks for libraries. |
|||
|
|||
# glib-2.0 |
|||
PKG_CHECK_MODULES(GLIB, glib-2.0 >= 2.16.0, [ |
|||
AC_DEFINE([HAVE_GLIB_H], [1], [glib.h]) |
|||
],[AC_MSG_ERROR("glib-2.0 >= 2.16.0 not found")]) |
|||
|
|||
# lib ev |
|||
AC_CHECK_HEADERS([ev.h], [], [AC_MSG_ERROR("ev.h not found")]) |
|||
AC_CHECK_LIB([ev], [ev_loop], [ |
|||
LIBS="-lev ${LIBS}" |
|||
AC_DEFINE([HAVE_LIBEV], [1], [ev_loop in -lev]) |
|||
], [AC_MSG_ERROR("libev not found")]) |
|||
|
|||
# Checks for header files. |
|||
AC_CHECK_HEADERS([stdlib.h unistd.h], []) |
|||
|
|||
# Checks for typedefs, structures, and compiler characteristics. |
|||
AC_TYPE_PID_T |
|||
|
|||
# Checks for library functions. |
|||
AC_FUNC_FORK |
|||
|
|||
# check for extra compiler options (warning options) |
|||
if test "${GCC}" = "yes"; then |
|||
CFLAGS="${CFLAGS} -Wall -W -Wshadow -pedantic -std=gnu99" |
|||
fi |
|||
|
|||
AC_ARG_ENABLE(extra-warnings, |
|||
AC_HELP_STRING([--enable-extra-warnings],[enable extra warnings (gcc specific)]), |
|||
[case "${enableval}" in |
|||
yes) extrawarnings=true ;; |
|||
no) extrawarnings=false ;; |
|||
*) AC_MSG_ERROR(bad value ${enableval} for --enable-extra-warnings) ;; |
|||
esac],[extrawarnings=false]) |
|||
|
|||
if test x$extrawarnings = xtrue; then |
|||
CFLAGS="${CFLAGS} -g -O2 -g2 -Wall -Wmissing-declarations -Wdeclaration-after-statement -Wno-pointer-sign -Wcast-align -Winline -Wsign-compare -Wnested-externs -Wpointer-arith -Wl,--as-needed -Wformat-security" |
|||
fi |
|||
|
|||
AC_CONFIG_FILES([Makefile]) |
|||
AC_OUTPUT |
|||
@ -0,0 +1,40 @@ |
|||
.TH multiwatch 1 "March 24, 2009" |
|||
.SH NAME |
|||
multiwatch \- forks and watches multiple instances of a program in the same environment |
|||
.SH SYNOPSIS |
|||
.B multiwatch |
|||
[options] -- <application> [app arguments] |
|||
|
|||
.B multiwatch |
|||
\-v |
|||
|
|||
.B multiwatch |
|||
\-\-help | \-? |
|||
.SH DESCRIPTION |
|||
\fImultiwatch\fP is used to fork and watch multiple fastcgi backends. |
|||
.SH OPTIONS |
|||
.TP 8 |
|||
.B \-f, \-\-forks=childs |
|||
Number of childs to fork and watch(default 1) |
|||
.TP 8 |
|||
.B \-r, --retry=retries |
|||
Number of retries to fork a single child |
|||
.TP 8 |
|||
.B \-t, --timeout=msecs |
|||
Retry timeout in ms; if the child dies after the timeout the retry counter is reset |
|||
.TP 8 |
|||
.B \-?, --help |
|||
General usage instructions |
|||
.TP 8 |
|||
.B \-v, --version |
|||
Show version |
|||
.SH EXAMPLE |
|||
.TP 8 |
|||
Spawn 2 rails instances on the same fastcgi socket (and supervise them): |
|||
.RS 8 |
|||
.B spawn-fcgi -s /tmp/fastcgi-php.sock -C 0 -n /usr/bin/multiwatch -f 2 /home/rails/public/dispatch.fcgi |
|||
.RE |
|||
.SH SEE ALSO |
|||
spawn-fcgi(1) |
|||
.SH AUTHOR |
|||
Stefan Buehler <stbuehler@web.de>. |
|||
@ -0,0 +1,243 @@ |
|||
|
|||
#include <glib.h> |
|||
#include <ev.h> |
|||
|
|||
#include <signal.h> |
|||
#include <stdlib.h> |
|||
#include <sys/types.h> |
|||
#include <sys/wait.h> |
|||
#include <unistd.h> |
|||
|
|||
#include <errno.h> |
|||
|
|||
#ifdef HAVE_CONFIG_H |
|||
#include "config.h" |
|||
#endif |
|||
|
|||
#define UNUSED(x) ((void)(x)) |
|||
|
|||
#define PACKAGE_DESC (PACKAGE_NAME "-" PACKAGE_VERSION " - forks and watches multiple instances of a program in the same environment") |
|||
|
|||
typedef struct { |
|||
gchar **app; |
|||
|
|||
gint forks; |
|||
|
|||
/* how many times we try to spawn a child */ |
|||
gint retry; |
|||
|
|||
/* time within a dieing child is handled as "spawn failed" |
|||
* if it dies after the timeout, the retry counter is reset and |
|||
* we try to get it up again |
|||
*/ |
|||
gint retry_timeout_ms; |
|||
|
|||
gboolean show_version; |
|||
} options; |
|||
|
|||
struct data; |
|||
typedef struct data data; |
|||
|
|||
struct child; |
|||
typedef struct child child; |
|||
|
|||
struct child { |
|||
data *d; |
|||
int id; |
|||
pid_t pid; |
|||
gint tries; |
|||
ev_tstamp last_spawn; |
|||
ev_child watcher; |
|||
}; |
|||
|
|||
struct data { |
|||
child *childs; |
|||
guint running; |
|||
gboolean shutdown; |
|||
struct ev_loop *loop; |
|||
ev_signal sigHUP, sigINT, sigQUIT, sigTERM, sigUSR1, sigUSR2; |
|||
gint return_status; |
|||
}; |
|||
|
|||
static options opts = { |
|||
NULL, |
|||
1, |
|||
3, |
|||
10000, |
|||
FALSE |
|||
}; |
|||
|
|||
static void forward_sig_cb(struct ev_loop *loop, ev_signal *w, int revents) { |
|||
data *d = (data*) w->data; |
|||
UNUSED(loop); |
|||
UNUSED(revents); |
|||
|
|||
for (gint i = 0; i < opts.forks; i++) { |
|||
if (d->childs[i].pid != -1) { |
|||
kill(d->childs[i].pid, w->signum); |
|||
} |
|||
} |
|||
} |
|||
|
|||
static void terminate_forward_sig_cb(struct ev_loop *loop, ev_signal *w, int revents) { |
|||
data *d = (data*) w->data; |
|||
UNUSED(loop); |
|||
UNUSED(revents); |
|||
|
|||
d->shutdown = TRUE; |
|||
|
|||
for (gint i = 0; i < opts.forks; i++) { |
|||
if (d->childs[i].pid != -1) { |
|||
kill(d->childs[i].pid, w->signum); |
|||
} |
|||
} |
|||
} |
|||
|
|||
static void spawn(child* c) { |
|||
pid_t pid; |
|||
|
|||
if (c->tries++ > opts.retry) { |
|||
g_printerr("Child[%i] died to often, not forking again\n", c->id); |
|||
return; |
|||
} |
|||
|
|||
switch (pid = fork()) { |
|||
case -1: |
|||
g_printerr("Fatal Error: Couldn't fork child[%i]: %s\n", c->id, g_strerror(errno)); |
|||
if (0 == c->d->running) { |
|||
g_printerr("No child running and fork failed -> exit\n"); |
|||
c->d->return_status = -100; |
|||
ev_unloop(c->d->loop, EVUNLOOP_ALL); |
|||
} |
|||
/* Do not retry... */ |
|||
break; |
|||
case 0: |
|||
/* child */ |
|||
execv(opts.app[0], opts.app); |
|||
g_printerr("Exec failed: %s\n", g_strerror(errno)); |
|||
exit(errno); |
|||
break; |
|||
default: |
|||
c->pid = pid; |
|||
c->d->running++; |
|||
c->last_spawn = ev_now(c->d->loop); |
|||
ev_child_set(&c->watcher, c->pid, 0); |
|||
ev_child_start(c->d->loop, &c->watcher); |
|||
break; |
|||
} |
|||
} |
|||
|
|||
static void child_died(struct ev_loop *loop, ev_child *w, int revents) { |
|||
child *c = (child*) w->data; |
|||
UNUSED(revents); |
|||
|
|||
ev_child_stop(loop, w); |
|||
c->d->running--; |
|||
c->pid = -1; |
|||
|
|||
if (c->d->shutdown) return; |
|||
|
|||
if (ev_now(c->d->loop) - c->last_spawn > (opts.retry_timeout_ms / (ev_tstamp) 1000)) { |
|||
g_printerr("Child[%i] died, respawn\n", c->id); |
|||
c->tries = 0; |
|||
} else { |
|||
g_printerr("Spawing child[%i] failed, next try\n", c->id); |
|||
} |
|||
|
|||
spawn(c); |
|||
} |
|||
|
|||
static const GOptionEntry entries[] = { |
|||
{ "forks", 'f', 0, G_OPTION_ARG_INT, &opts.forks, "Number of childs to fork and watch(default 1)", "childs" }, |
|||
{ "retry", 'r', 0, G_OPTION_ARG_INT, &opts.retry, "Number of retries to fork a single child", "retries" }, |
|||
{ "timeout", 't', 0, G_OPTION_ARG_INT, &opts.retry_timeout_ms, "Retry timeout in ms; if the child dies after the timeout the retry counter is reset", "ms" }, |
|||
{ "version", 'v', 0, G_OPTION_ARG_NONE, &opts.show_version, "Show version", NULL }, |
|||
{ G_OPTION_REMAINING, 0, 0, G_OPTION_ARG_STRING_ARRAY, &opts.app, "<application> [app arguments]", NULL }, |
|||
{ NULL, 0, 0, 0, NULL, NULL, NULL } |
|||
}; |
|||
|
|||
int main(int argc, char **argv) { |
|||
GOptionContext *context; |
|||
GError *error = NULL; |
|||
gint res; |
|||
|
|||
context = g_option_context_new("<application> [app arguments]"); |
|||
g_option_context_add_main_entries(context, entries, NULL); |
|||
g_option_context_set_summary(context, PACKAGE_DESC); |
|||
|
|||
if (!g_option_context_parse (context, &argc, &argv, &error)) { |
|||
g_printerr("Option parsing failed: %s\n", error->message); |
|||
return -1; |
|||
} |
|||
|
|||
if (opts.show_version) { |
|||
g_printerr(PACKAGE_DESC); |
|||
g_printerr("\nBuild-Date: " __DATE__ " " __TIME__ "\n"); |
|||
return 0; |
|||
} |
|||
|
|||
if (!opts.app || !opts.app[0]) { |
|||
g_printerr("Missing application\n"); |
|||
return -2; |
|||
} |
|||
|
|||
if (opts.forks < 1) { |
|||
g_printerr("Invalid forks argument: %i\n", opts.forks); |
|||
return -3; |
|||
} |
|||
|
|||
if (opts.retry < 1) { |
|||
g_printerr("Invalid retry argument: %i\n", opts.retry); |
|||
return -4; |
|||
} |
|||
|
|||
if (opts.retry_timeout_ms < 0) { |
|||
g_printerr("Invalid timeout argument: %i\n", opts.retry_timeout_ms); |
|||
return -5; |
|||
} |
|||
|
|||
data *d = g_slice_new0(data); |
|||
d->childs = (child*) g_slice_alloc0(sizeof(child) * opts.forks); |
|||
d->running = 0; |
|||
d->shutdown = FALSE; |
|||
d->return_status = 0; |
|||
d->loop = ev_default_loop(0); |
|||
|
|||
#define WATCH_SIG(x) do { ev_signal_init(&d->sig##x, forward_sig_cb, SIG##x); d->sig##x.data = d; ev_signal_start(d->loop, &d->sig##x); ev_unref(d->loop); } while (0) |
|||
#define WATCH_TERM_SIG(x) do { ev_signal_init(&d->sig##x, terminate_forward_sig_cb, SIG##x); d->sig##x.data = d; ev_signal_start(d->loop, &d->sig##x); ev_unref(d->loop); } while (0) |
|||
#define UNWATCH_SIG(x) do { ev_ref(d->loop); ev_signal_stop(d->loop, &d->sig##x); } while (0) |
|||
|
|||
WATCH_TERM_SIG(HUP); |
|||
WATCH_TERM_SIG(INT); |
|||
WATCH_TERM_SIG(QUIT); |
|||
WATCH_TERM_SIG(TERM); |
|||
WATCH_SIG(USR1); |
|||
WATCH_SIG(USR2); |
|||
|
|||
for (gint i = 0; i < opts.forks; i++) { |
|||
d->childs[i].d = d; |
|||
d->childs[i].id = i; |
|||
d->childs[i].pid = -1; |
|||
d->childs[i].tries = 0; |
|||
d->childs[i].watcher.data = &d->childs[i]; |
|||
ev_child_init(&d->childs[i].watcher, child_died, -1, 0); |
|||
|
|||
spawn(&d->childs[i]); |
|||
} |
|||
|
|||
ev_loop(d->loop, 0); |
|||
|
|||
res = d->return_status; |
|||
|
|||
g_slice_free1(sizeof(child) * opts.forks, d->childs); |
|||
g_slice_free(data, d); |
|||
|
|||
UNWATCH_SIG(HUP); |
|||
UNWATCH_SIG(INT); |
|||
UNWATCH_SIG(QUIT); |
|||
UNWATCH_SIG(TERM); |
|||
UNWATCH_SIG(USR1); |
|||
UNWATCH_SIG(USR2); |
|||
|
|||
return res; |
|||
} |
|||
Write
Preview
Loading…
Cancel
Save
Reference in new issue