Added C++ compatibility, change to libtool, improve monitoring

configure.in

@@ -11,6 +11,7 @@ AC_CANONICAL_HOST
 AC_PROG_RANLIB
 AM_PROG_CC_C_O
 AC_GNU_SOURCE
+AC_PROG_LIBTOOL
 AC_CHECK_HEADERS([linux/netlink.h linux/genetlink.h],, AC_MSG_ERROR([netlink headers not found]), [[]])
 AC_PROG_GCC_TRADITIONAL
 

lxc.spec.in

@@ -82,6 +82,7 @@ rm -rf %{buildroot}
 %files
 %defattr(-,root,root)
 %{_sysconfdir}/%{name}/*
+%{_libdir}/*.so*
 %{_bindir}/*
 
 %files devel
@@ -89,6 +90,10 @@ rm -rf %{buildroot}
 %{_includedir}/%{name}/*
 %{_libdir}/*.a
 
+%post devel
+ln -sf %{_includedir}/%{name} %{_includedir}/liblxc
+
+
 %changelog
 * Sun Aug 3 2008 Daniel Lezcano <dlezcano@fr.ibm.com>
 - Initial RPM release.

src/liblxc/Makefile.am

@@ -1,4 +1,4 @@
-lib_LIBRARIES = liblxc.a
+lib_LTLIBRARIES = liblxc.la
 pkginclude_HEADERS = \
 		lxc.h \
 		lxc_cgroup.h \
@@ -10,16 +10,15 @@ pkginclude_HEADERS = \
 		lxc_state.h \
 		lxc_utils.h
 
-liblxc_a_SOURCES = \
+liblxc_la_SOURCES = \
 	create.c \
 	destroy.c \
 	start.c \
 	stop.c \
 	execute.c \
-	monitor.c \
+	monitor.c monitor.h \
 	kill.c \
 	freezer.c \
-	lxc_state.c lxc_state.h \
 	lxc_cgroup.c lxc_cgroup.h \
 	lxc.h \
 	lxc_utils.h \
@@ -34,3 +33,5 @@ liblxc_a_SOURCES = \
         nl.c nl.h \
         rtnl.c rtnl.h \
         genl.c genl.h
+
+liblxc_la_LDFLAGS = -release @PACKAGE_VERSION@

src/liblxc/create.c

@@ -116,7 +116,7 @@ int lxc_create(const char *name, struct lxc_conf *conf)
 		goto err;
 	}
 
-	if (mkstate(name)) {
+	if (lxc_mkstate(name)) {
 		lxc_log_error("failed to create the state file for %s", name);
 		goto err;
 	}
@@ -139,7 +139,7 @@ out:
 err_state:
 	lxc_unconfigure(name);
 
-	if (rmstate(name))
+	if (lxc_rmstate(name))
 		lxc_log_error("failed to remove state file for %s", name);
 err:
 	if (remove_lxc_directory(name))

src/liblxc/destroy.c

@@ -94,11 +94,13 @@ int lxc_destroy(const char *name)
 		goto out;
 	}
 
-	if (rmstate(name)) {
+	if (lxc_rmstate(name)) {
 		lxc_log_error("failed to remove state file for %s", name);
 		goto out_lock;
 	}
 	
+	lxc_monitor_cleanup(name);
+
 	if (lxc_unconfigure(name)) {
 		lxc_log_error("failed to cleanup %s", name);
 		goto out_lock;

src/liblxc/execute.c

@@ -64,10 +64,8 @@ int lxc_execute(const char *name, int argc, char *argv[],
 		return -1;
 	}
 
-	fcntl(lock, F_SETFD, FD_CLOEXEC);
-
 	if (lxc_setstate(name, STARTING)) {
-		lxc_log_error("failed to set state %s", state2str(STARTING));
+		lxc_log_error("failed to set state %s", lxc_state2str(STARTING));
 		goto out;
 	}
 
@@ -117,10 +115,12 @@ int lxc_execute(const char *name, int argc, char *argv[],
 				lxc_log_error("failed to setup the container");
 				goto error;
 			}
+
 			if (mount("proc", "/proc", "proc", 0, NULL)) {
-				lxc_log_error("failed to mount '/proc'");
+				lxc_log_syserror("failed to mount '/proc'");
 				goto error;
 			}
+
 			if (mount("sysfs", "/sys", "sysfs", 0, NULL)) {
 				lxc_log_syserror("failed to mount '/sys'");
 				/* continue: non fatal error until sysfs not per
@@ -213,7 +213,7 @@ int lxc_execute(const char *name, int argc, char *argv[],
 		lxc_log_warning("cgroupfs not found: cgroup disabled");
 
 	if (lxc_setstate(name, RUNNING)) {
-		lxc_log_error("failed to set state to %s", state2str(RUNNING));
+		lxc_log_error("failed to set state to %s", lxc_state2str(RUNNING));
 		goto err_state_failed;
 	}
 
@@ -226,7 +226,7 @@ wait_again:
 	}
 
 	if (lxc_setstate(name, STOPPING))
-		lxc_log_error("failed to set state %s", state2str(STOPPING));
+		lxc_log_error("failed to set state %s", lxc_state2str(STOPPING));
 
 	if (clone_flags & CLONE_NEWNET && conf_destroy_network(name))
 		lxc_log_error("failed to destroy the network");
@@ -234,7 +234,7 @@ wait_again:
 	err = 0;
 out:
 	if (lxc_setstate(name, STOPPED))
-		lxc_log_error("failed to set state %s", state2str(STOPPED));
+		lxc_log_error("failed to set state %s", lxc_state2str(STOPPED));
 
 	lxc_unlink_nsgroup(name);
 	unlink(init);
@@ -257,7 +257,7 @@ err_pipe_read:
 err_open:
 err_waitpid_failed:
 	if (lxc_setstate(name, ABORTING))
-		lxc_log_error("failed to set state %s", state2str(STOPPED));
+		lxc_log_error("failed to set state %s", lxc_state2str(STOPPED));
 
 	kill(pid, SIGKILL);
 err_fork_ns:

src/liblxc/lock.c

@@ -42,6 +42,8 @@ int lxc_get_lock(const char *name)
 		goto out;
 	}
 
+	fcntl(fd, F_SETFD, FD_CLOEXEC);
+
 	if (flock(fd, LOCK_EX|LOCK_NB)) {
 		ret = errno == EWOULDBLOCK ? 0 : -errno;
 		close(fd);

src/liblxc/lxc.h

@@ -23,20 +23,24 @@
 #ifndef __lxc_h
 #define __lxc_h
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 /**
  Following code is for liblxc.
 
  liblxc/lxc.h will contain exports of liblxc
  **/
 
-#include <lxc_state.h>
+#include <liblxc/lxc_state.h>
-#include <lxc_list.h>
+#include <liblxc/lxc_list.h>
-#include <lxc_conf.h>
+#include <liblxc/lxc_conf.h>
-#include <lxc_log.h>
+#include <liblxc/lxc_log.h>
-#include <lxc_lock.h>
+#include <liblxc/lxc_lock.h>
-#include <lxc_cgroup.h>
+#include <liblxc/lxc_cgroup.h>
-#include <lxc_namespace.h>
+#include <liblxc/lxc_namespace.h>
-#include <lxc_utils.h>
+#include <liblxc/lxc_utils.h>
 
 #define LXCPATH "/var/lxc"
 #define MAXPIDLEN 20
@@ -104,12 +108,37 @@ extern int lxc_stop(const char *name);
  * is changed, a state data is send through a file descriptor passed to
  * the function with output_fd.
  * The function will block until the container is destroyed.
- * @name : the name of the contaier
+ * @name : the name of the container
  * @output_fd : the file descriptor where to send the states
  * Returns 0 on success, < 0 otherwise
  */
 extern int lxc_monitor(const char *name, int output_fd);
 
+/*
+ * Open the monitoring mechanism for a specific container
+ * The function will return an fd corresponding to the events
+ * @name  : the name of the container
+ * Returns a file descriptor on success, < 0 otherwise
+ */
+extern int lxc_monitor_open(const char *name);
+
+/*
+ * Read the state of the container if this one has changed
+ * The function will block until there is an event available
+ * @fd : the file descriptor provided by lxc_monitor_open
+ * @state : the variable which will be filled with the state
+ * Returns 0 if the monitored container has exited, > 0 if
+ * data was readen, < 0 otherwise
+ */
+extern int lxc_monitor_read(int fd, lxc_state_t *state);
+
+/*
+ * Close the fd associated with the monitoring
+ * @fd : the file descriptor provided by lxc_monitor_open
+ * Returns 0 on success, < 0 otherwise
+ */
+extern int lxc_monitor_close(int fd);
+
 /*
  * Show the console of the container.
  * @name : the name of container
@@ -220,4 +249,8 @@ extern int lxc_cgroup_get_cpuset(const char *name, long *cpumask,
  */
 extern int lxc_cgroup_get_cpu_usage(const char *name, long long *usage);
 
+#ifdef __cplusplus
+}
+#endif
+
 #endif

src/liblxc/lxc_cgroup.c

@@ -101,7 +101,7 @@ int lxc_unlink_nsgroup(const char *name)
 	return ret;
 }
 
-int lxc_set_priority(const char *name, int priority)
+int lxc_cgroup_set_priority(const char *name, int priority)
 {
 	int fd;
 	char *path = NULL, *prio = NULL;
@@ -129,7 +129,7 @@ out:
 	return 0;
 }
 
-int lxc_get_priority(const char *name, int *priority)
+int lxc_cgroup_get_priority(const char *name, int *priority)
 {
 	int fd, ret = -1;
 	char *path, prio[MAXPRIOLEN];

src/liblxc/lxc_list.h

@@ -35,13 +35,13 @@ static inline int lxc_list_empty(struct lxc_list *list)
 	return list == list->next;
 }
 
-static inline void lxc_list_add(struct lxc_list *list, struct lxc_list *new)
+static inline void lxc_list_add(struct lxc_list *head, struct lxc_list *list)
 {
-	struct lxc_list *next = list->next;
+	struct lxc_list *next = head->next;
-	next->prev = new;
+	next->prev = list;
-	new->next = next;
+	list->next = next;
-	new->prev = list;
+	list->prev = head;
-	list->next = new;
+	head->next = list;
 }
 
 static inline void lxc_list_del(struct lxc_list *list)

src/liblxc/lxc_state.c

@@ -32,20 +32,21 @@
 #include <sys/file.h>
 
 #include <lxc.h>
+#include "monitor.h"
 
 static char *strstate[] = {
 	"STOPPED", "STARTING", "RUNNING", "STOPPING",
 	"ABORTING", "FREEZING", "FROZEN",
 };
 
-const char *state2str(lxc_state_t state)
+const char *lxc_state2str(lxc_state_t state)
 {
 	if (state < STOPPED || state > MAX_STATE - 1)
 		return NULL;
 	return strstate[state];
 }
 
-lxc_state_t str2state(const char *state)
+lxc_state_t lxc_str2state(const char *state)
 {
 	int i, len;
 	len = sizeof(strstate)/sizeof(strstate[0]);
@@ -59,7 +60,7 @@ int lxc_setstate(const char *name, lxc_state_t state)
 {
 	int fd, err;
 	char file[MAXPATHLEN];
-	const char *str = state2str(state);
+	const char *str = lxc_state2str(state);
 
 	if (!str)
 		return -1;
@@ -91,6 +92,8 @@ int lxc_setstate(const char *name, lxc_state_t state)
 out:
 	close(fd);
 
+	lxc_monitor_send_state(name, state);
+
 	/* let the event to be propagated, crappy but that works,
 	 * otherwise the events will be folded into only one event,
 	 * and I want to have them to be one by one in order
@@ -101,7 +104,7 @@ out:
 	return -err;
 }
 
-int mkstate(const char *name)
+int lxc_mkstate(const char *name)
 {
 	int fd;
 	char file[MAXPATHLEN];
@@ -116,7 +119,7 @@ int mkstate(const char *name)
 	return 0;
 }
 
-int rmstate(const char *name)
+int lxc_rmstate(const char *name)
 {
 	char file[MAXPATHLEN];
 	snprintf(file, MAXPATHLEN, LXCPATH "/%s/state", name);
@@ -152,7 +155,7 @@ lxc_state_t lxc_getstate(const char *name)
 	file[err] = '\0';
 
 	close(fd);
-	return str2state(file);
+	return lxc_str2state(file);
 }
 
 static int freezer_state(const char *name)
@@ -166,7 +169,7 @@ static int freezer_state(const char *name)
 		 LXCPATH "/%s/freezer.freeze", name);
 
 	file = fopen(freezer, "r");
-	if (file < 0) {
+	if (!file) {
 		lxc_log_syserror("failed to open %s", freezer);
 		return -1;
 	}
@@ -179,7 +182,7 @@ static int freezer_state(const char *name)
 		return -1;
 	}
 
-	return str2state(status);
+	return lxc_str2state(status);
 }
 
 lxc_state_t lxc_state(const char *name)

src/liblxc/lxc_state.h

@@ -28,11 +28,12 @@ typedef enum {
 	ABORTING, FREEZING, FROZEN, MAX_STATE,
 } lxc_state_t;
 
-extern const char *state2str(lxc_state_t state);
+extern int lxc_mkstate(const char *name);
-extern lxc_state_t str2state(const char *state);
+extern int lxc_rmstate(const char *name);
-extern int mkstate(const char *name);
-extern int rmstate(const char *name);
 extern int lxc_setstate(const char *name, lxc_state_t state);
 extern lxc_state_t lxc_getstate(const char *name);
 
+extern lxc_state_t lxc_str2state(const char *state);
+extern const char *lxc_state2str(lxc_state_t state);
+
 #endif

src/liblxc/monitor.c

@@ -24,16 +24,22 @@
 #include <errno.h>
 #include <unistd.h>
 #include <string.h>
+#include <stdlib.h>
 #include <fcntl.h>
 #include <sys/types.h>
 #include <sys/stat.h>
 #include <sys/param.h>
 #include <sys/inotify.h>
+#include <sys/socket.h>
+#include <sys/un.h>
 #include <netinet/in.h>
 #include <net/if.h>
-
 #include <lxc.h>
 
+#ifndef UNIX_PATH_MAX
+#define UNIX_PATH_MAX 108
+#endif
+
 int lxc_monitor(const char *name, int output_fd)
 {
 	char path[MAXPATHLEN];
@@ -93,3 +99,72 @@ out:
 	close(nfd);
 	return err;
 }
+
+void lxc_monitor_send_state(const char *name, lxc_state_t state)
+{
+	int fd;
+	struct sockaddr_un addr;
+
+	fd = socket(PF_UNIX, SOCK_DGRAM, 0);
+	if (fd < 0)
+		lxc_log_syserror("failed to create notification socket");
+
+	memset(&addr, 0, sizeof(addr));
+	addr.sun_family = AF_UNIX;
+	snprintf(addr.sun_path, UNIX_PATH_MAX, LXCPATH "/%s/notification", name);
+
+	sendto(fd, &state, sizeof(state), 0, 
+	       (const struct sockaddr *)&addr, sizeof(addr));
+
+	close(fd);
+}
+
+void lxc_monitor_cleanup(const char *name)
+{
+	char path[UNIX_PATH_MAX];
+	snprintf(path, UNIX_PATH_MAX, LXCPATH "/%s/notification", name);
+	unlink(path);
+}
+
+int lxc_monitor_open(const char *name)
+{
+	int fd;
+	struct sockaddr_un addr;
+
+	fd = socket(PF_UNIX, SOCK_DGRAM, 0);
+	if (fd < 0) {
+		lxc_log_syserror("failed to create notification socket");
+		return -1;
+	}
+
+	memset(&addr, 0, sizeof(addr));
+
+	addr.sun_family = AF_UNIX;
+	snprintf(addr.sun_path, UNIX_PATH_MAX, LXCPATH "/%s/notification", name);
+	unlink(addr.sun_path);
+
+	if (bind(fd, (const struct sockaddr *)&addr, sizeof(addr))) {
+		lxc_log_syserror("failed to bind to '%s'", addr.sun_path);
+		return -1;
+	}
+
+	return fd;
+}
+
+int lxc_monitor_read(int fd, lxc_state_t *state)
+{
+	int ret;
+
+	ret = recv(fd, state, sizeof(*state), 0);
+	if (ret < 0) {
+		lxc_log_syserror("failed to received state");
+		return -1;
+	}
+
+	return ret;
+}
+
+int lxc_monitor_close(int fd)
+{
+	return close(fd);
+}

src/liblxc/start.c

@@ -69,7 +69,7 @@ int lxc_start(const char *name, int argc, char *argv[],
 
 	/* Begin the set the state to STARTING*/
 	if (lxc_setstate(name, STARTING)) {
-		lxc_log_error("failed to set state %s", state2str(STARTING));
+		lxc_log_error("failed to set state %s", lxc_state2str(STARTING));
 		goto out;
 	}
 
@@ -195,7 +195,7 @@ int lxc_start(const char *name, int argc, char *argv[],
 		lxc_log_warning("cgroupfs not found: cgroup disabled");
 
 	if (lxc_setstate(name, RUNNING)) {
-		lxc_log_error("failed to set state to %s", state2str(RUNNING));
+		lxc_log_error("failed to set state to %s", lxc_state2str(RUNNING));
 		goto err_state_failed;
 	}
 
@@ -208,7 +208,7 @@ wait_again:
 	}
 
 	if (lxc_setstate(name, STOPPING))
-		lxc_log_error("failed to set state %s", state2str(STOPPING));
+		lxc_log_error("failed to set state %s", lxc_state2str(STOPPING));
 
 	if (clone_flags & CLONE_NEWNET && conf_destroy_network(name))
 		lxc_log_error("failed to destroy the network");
@@ -216,7 +216,7 @@ wait_again:
 	err = 0;
 out:
 	if (lxc_setstate(name, STOPPED))
-		lxc_log_error("failed to set state %s", state2str(STOPPED));
+		lxc_log_error("failed to set state %s", lxc_state2str(STOPPED));
 
 	lxc_unlink_nsgroup(name);
 	unlink(init);
@@ -239,7 +239,7 @@ err_create_network:
 err_pipe_read:
 err_waitpid_failed:
 	if (lxc_setstate(name, ABORTING))
-		lxc_log_error("failed to set state %s", state2str(STOPPED));
+		lxc_log_error("failed to set state %s", lxc_state2str(STOPPED));
 
 	kill(pid, SIGKILL);
 err_fork_ns:

src/lxc/Makefile.am

@@ -17,50 +17,50 @@ bin_PROGRAMS = \
 	lxc-unfreeze \
 	lxc-priority
 
-lxc_create_SOURCES = lxc_create.c config.c config.h
+lxc_create_SOURCES = lxc_create.c lxc_config.c lxc_config.h
 lxc_create_LDADD = \
-	$(top_builddir)/src/liblxc/liblxc.a
+	$(top_builddir)/src/liblxc/liblxc.la
 
 lxc_destroy_SOURCES = lxc_destroy.c
 lxc_destroy_LDADD = \
-	$(top_builddir)/src/liblxc/liblxc.a
+	$(top_builddir)/src/liblxc/liblxc.la
 
 lxc_start_SOURCES = lxc_start.c
 lxc_start_LDADD = \
-	$(top_builddir)/src/liblxc/liblxc.a
+	$(top_builddir)/src/liblxc/liblxc.la
 
 lxc_stop_SOURCES = lxc_stop.c
 lxc_stop_LDADD = \
-	$(top_builddir)/src/liblxc/liblxc.a
+	$(top_builddir)/src/liblxc/liblxc.la
 
-lxc_execute_SOURCES = lxc_execute.c config.c
+lxc_execute_SOURCES = lxc_execute.c
 lxc_execute_LDADD = \
-        $(top_builddir)/src/liblxc/liblxc.a
+        $(top_builddir)/src/liblxc/liblxc.la
 
 lxc_monitor_SOURCES = lxc_monitor.c
 lxc_monitor_LDADD = \
-	$(top_builddir)/src/liblxc/liblxc.a
+	$(top_builddir)/src/liblxc/liblxc.la
 
 lxc_console_SOURCES = lxc_console.c
 lxc_console_LDADD = \
-        $(top_builddir)/src/liblxc/liblxc.a
+        $(top_builddir)/src/liblxc/liblxc.la
 
 lxc_state_SOURCES = lxc_state.c
 lxc_state_LDADD = \
-	$(top_builddir)/src/liblxc/liblxc.a
+	$(top_builddir)/src/liblxc/liblxc.la
 
 lxc_kill_SOURCES = lxc_kill.c
 lxc_kill_LDADD = \
-        $(top_builddir)/src/liblxc/liblxc.a
+        $(top_builddir)/src/liblxc/liblxc.la
 
 lxc_freeze_SOURCES = lxc_freeze.c
 lxc_freeze_LDADD = \
-        $(top_builddir)/src/liblxc/liblxc.a
+        $(top_builddir)/src/liblxc/liblxc.la
 
 lxc_unfreeze_SOURCES = lxc_unfreeze.c
 lxc_unfreeze_LDADD = \
-        $(top_builddir)/src/liblxc/liblxc.a
+        $(top_builddir)/src/liblxc/liblxc.la
 
 lxc_priority_SOURCES = lxc_priority.c
 lxc_priority_LDADD = \
-        $(top_builddir)/src/liblxc/liblxc.a
+        $(top_builddir)/src/liblxc/liblxc.la

src/lxc/lxc_config.c

@@ -0,0 +1,546 @@
+/*
+ * lxc: linux Container library
+ *
+ * (C) Copyright IBM Corp. 2007, 2008
+ *
+ * Authors:
+ * Daniel Lezcano <dlezcano at fr.ibm.com>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library 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
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <errno.h>
+#include <sys/types.h>
+#include <sys/param.h>
+#include <sys/utsname.h>
+#include <arpa/inet.h>
+#include <netinet/in.h>
+#include <net/if.h>
+
+#include <lxc.h>
+
+typedef int (*file_cb)(char* buffer, void *data);
+typedef int (*config_cb)(char *value, struct lxc_conf *lxc_conf);
+
+static int config_mount(char *, struct lxc_conf *);
+static int config_chroot(char *, struct lxc_conf *);
+static int config_utsname(char *, struct lxc_conf *);
+static int config_network_type(char *, struct lxc_conf *);
+static int config_network_flags(char *, struct lxc_conf *);
+static int config_network_link(char *, struct lxc_conf *);
+static int config_network_name(char *, struct lxc_conf *);
+static int config_network_hwaddr(char *, struct lxc_conf *);
+static int config_network_ipv4(char *, struct lxc_conf *);
+static int config_network_ipv6(char *, struct lxc_conf *);
+
+struct config {
+	char *name;
+	int type;
+	config_cb cb;
+};
+
+enum { MOUNT, CHROOT, UTSNAME, NETTYPE, NETFLAGS, NETLINK, 
+       NETNAME, NETHWADDR, NETIPV4, NETIPV6 };
+
+struct config config[] = {
+	{ "lxc.mount",             MOUNT,     config_mount           },
+	{ "lxc.chroot",            CHROOT,    config_chroot          },
+	{ "lxc.utsname",           UTSNAME,   config_utsname         },
+	{ "lxc.network.type",      NETTYPE,   config_network_type    },
+	{ "lxc.network.flags",     NETFLAGS,  config_network_flags   },
+	{ "lxc.network.link",      NETLINK,   config_network_link    },
+	{ "lxc.network.name",      NETNAME,   config_network_name    },
+	{ "lxc.network.hwaddr",    NETHWADDR, config_network_hwaddr  },
+	{ "lxc.network.ipv4",      NETIPV4,   config_network_ipv4    },
+	{ "lxc.network.ipv6",      NETIPV6,   config_network_ipv6    },
+};
+
+static const size_t config_size = sizeof(config)/sizeof(struct config);
+
+static struct config *getconfig(const char *key)
+{
+	int i;
+
+	for (i = 0; i < config_size; i++)
+		if (!strncmp(config[i].name, key, 
+			     strlen(config[i].name)))
+			return &config[i];
+	return NULL;
+}
+
+static int is_line_empty(char *line)
+{
+	int i;
+	size_t len = strlen(line);
+
+	for (i = 0; i < len; i++)
+		if (line[i] != ' ' && line[i] != '\t' && 
+		    line[i] != '\n' && line[i] != '\r' &&
+		    line[i] != '\f' && line[i] != '\0')
+			return 0;
+	return 1;
+}
+
+static int char_left_gc(char *buffer, size_t len)
+{
+	int i;
+	for (i = 0; i < len; i++) {
+		if (buffer[i] == ' ' ||
+		    buffer[i] == '\t')
+			continue;
+		return i;
+	}
+	return 0;
+}
+
+static int char_right_gc(char *buffer, size_t len)
+{
+	int i;
+	for (i = len - 1; i >= 0; i--) {
+		if (buffer[i] == ' '  ||
+		    buffer[i] == '\t' ||
+		    buffer[i] == '\n' ||
+		    buffer[i] == '\0')
+			continue;
+		return i + 1;
+	}
+	return 0;
+}
+
+static int config_network_type(char *value, struct lxc_conf *lxc_conf)
+{
+	struct lxc_list *networks = &lxc_conf->networks;
+	struct lxc_network *network;
+	struct lxc_netdev *netdev;
+	struct lxc_list *list;
+	struct lxc_list *ndlist;
+
+	network = malloc(sizeof(*network));
+	if (!network) {
+		lxc_log_syserror("failed to allocate memory");
+		return -1;
+	}
+	
+	lxc_list_init(&network->netdev);
+
+	netdev = malloc(sizeof(*netdev));
+	if (!netdev) {
+		lxc_log_syserror("failed to allocate memory");
+		return -1;
+	}
+
+	lxc_list_init(&netdev->ipv4);
+	lxc_list_init(&netdev->ipv6);
+	lxc_list_init(&netdev->route4);
+	lxc_list_init(&netdev->route6);
+
+	ndlist = malloc(sizeof(*ndlist));
+	if (!ndlist) {
+		lxc_log_syserror("failed to allocate memory");
+		return -1;
+	}
+
+	ndlist->elem = netdev;
+
+	lxc_list_add(&network->netdev, ndlist);
+
+	list = malloc(sizeof(*list));
+	if (!list) {
+		lxc_log_syserror("failed to allocate memory");
+		return -1;
+	}
+
+	lxc_list_init(list);
+	list->elem = network;
+
+	lxc_list_add(networks, list);
+	
+	if (!strcmp(value, "veth"))
+		network->type = VETH;
+	else if (!strcmp(value, "macvlan"))
+		network->type = MACVLAN;
+	else if (!strcmp(value, "phys"))
+		network->type = PHYS;
+	else {
+		lxc_log_error("invalid network type %s", value);
+		return -1;
+	}
+	return 0;
+}
+
+static int config_network_flags(char *value, struct lxc_conf *lxc_conf)
+{
+	struct lxc_list *networks = &lxc_conf->networks;
+	struct lxc_network *network;
+	struct lxc_netdev *netdev;
+
+	if (lxc_list_empty(networks)) {
+		lxc_log_error("network is not created for '%s' option", value);
+		return -1;
+	}
+
+	network = lxc_list_first_elem(networks);
+	if (!network) {
+		lxc_log_error("no network defined for '%s' option", value);
+		return -1;
+	}
+
+	netdev = lxc_list_first_elem(&network->netdev);
+	netdev->flags |= IFF_UP;
+	return 0;
+}
+
+static int config_network_link(char *value, struct lxc_conf *lxc_conf)
+{
+	struct lxc_list *networks = &lxc_conf->networks;
+	struct lxc_network *network;
+	struct lxc_netdev *netdev;
+
+	if (lxc_list_empty(networks)) {
+		lxc_log_error("network is not created for %s", value);
+		return -1;
+	}
+
+	network = lxc_list_first_elem(networks);
+	if (!network) {
+		lxc_log_error("no network defined for %s", value);
+		return -1;
+	}
+
+	if (strlen(value) > IFNAMSIZ) {
+		lxc_log_error("invalid interface name: %s", value);
+		return -1;
+	}
+
+	netdev = lxc_list_first_elem(&network->netdev);
+	netdev->ifname = strdup(value);
+	return 0;
+}
+
+static int config_network_name(char *value, struct lxc_conf *lxc_conf)
+{
+	struct lxc_list *networks = &lxc_conf->networks;
+	struct lxc_network *network;
+	struct lxc_netdev *netdev;
+
+	if (lxc_list_empty(networks)) {
+		lxc_log_error("network is not created for %s", value);
+		return -1;
+	}
+
+	network = lxc_list_first_elem(networks);
+	if (!network) {
+		lxc_log_error("no network defined for %s", value);
+		return -1;
+	}
+
+	if (strlen(value) > IFNAMSIZ) {
+		lxc_log_error("invalid interface name: %s", value);
+		return -1;
+	}
+
+	netdev = lxc_list_first_elem(&network->netdev);
+	netdev->newname = strdup(value);
+	return 0;
+}
+
+static int config_network_hwaddr(char *value, struct lxc_conf *lxc_conf)
+{
+	struct lxc_list *networks = &lxc_conf->networks;
+	struct lxc_network *network;
+	struct lxc_netdev *netdev;
+
+	if (lxc_list_empty(networks)) {
+		lxc_log_error("network is not created for %s", value);
+		return -1;
+	}
+
+	network = lxc_list_first_elem(networks);
+	if (!network) {
+		lxc_log_error("no network defined for %s", value);
+		return -1;
+	}
+
+	netdev = lxc_list_first_elem(&network->netdev);
+	netdev->hwaddr = strdup(value);
+	return 0;
+}
+
+static int config_network_ipv4(char *value, struct lxc_conf *lxc_conf)
+{
+	struct lxc_list *networks = &lxc_conf->networks;
+	struct lxc_network *network;
+	struct lxc_inetdev *inetdev;
+	struct lxc_netdev *netdev;
+	struct lxc_list *list;
+	char *cursor, *slash, *addr = NULL, *bcast = NULL, *prefix = NULL;
+
+	if (lxc_list_empty(networks)) {
+		lxc_log_error("network is not created for '%s'", value);
+		return -1;
+	}
+
+	network = lxc_list_first_elem(networks);
+	if (!network) {
+		lxc_log_error("no network defined for '%s'", value);
+		return -1;
+	}
+
+	netdev = lxc_list_first_elem(&network->netdev);
+	if (!netdev) {
+		lxc_log_error("no netdev defined for '%s'", value);
+	}
+
+	inetdev = malloc(sizeof(*inetdev));
+	if (!inetdev) {
+		lxc_log_syserror("failed to allocate ipv4 address");
+		return -1;
+	}
+	memset(inetdev, 0, sizeof(*inetdev));
+
+	list = malloc(sizeof(*list));
+	if (!list) {
+		lxc_log_syserror("failed to allocate memory");
+		return -1;
+	}
+
+	lxc_list_init(list);
+	list->elem = inetdev;
+
+	addr = value;
+
+	cursor = strstr(addr, " ");
+	if (cursor) {
+		*cursor = '\0';
+		bcast = cursor + 1;
+	}
+
+	slash = strstr(addr, "/");
+	if (slash) {
+		*slash = '\0';
+		prefix = slash + 1;
+	}
+
+	if (!addr) {
+		lxc_log_error("no address specified");
+		return -1;
+	}
+
+	if (!inet_pton(AF_INET, addr, &inetdev->addr)) {
+		lxc_log_syserror("invalid ipv4 address: %s", value);
+		return -1;
+	}
+
+	if (bcast)
+		if (!inet_pton(AF_INET, bcast, &inetdev->bcast)) {
+			lxc_log_syserror("invalid ipv4 address: %s", value);
+			return -1;
+		}
+
+	if (prefix)
+		inetdev->prefix = atoi(prefix);
+
+	lxc_list_add(&netdev->ipv4, list);
+
+	return 0;
+}
+
+static int config_network_ipv6(char *value, struct lxc_conf *lxc_conf)
+{
+	struct lxc_list *networks = &lxc_conf->networks;
+	struct lxc_network *network;
+	struct lxc_netdev *netdev;
+	struct lxc_inet6dev *inet6dev;
+	struct lxc_list *list;
+	char *slash;
+	char *netmask;
+
+	if (lxc_list_empty(networks)) {
+		lxc_log_error("network is not created for %s", value);
+		return -1;
+	}
+
+	network = lxc_list_first_elem(networks);
+	if (!network) {
+		lxc_log_error("no network defined for %s", value);
+		return -1;
+	}
+
+	inet6dev = malloc(sizeof(*inet6dev));
+	if (!inet6dev) {
+		lxc_log_syserror("failed to allocate ipv6 address");
+		return -1;
+	}
+	memset(inet6dev, 0, sizeof(*inet6dev));
+
+	list = malloc(sizeof(*list));
+	if (!list) {
+		lxc_log_syserror("failed to allocate memory");
+		return -1;
+	}
+
+	lxc_list_init(list);
+	list->elem = inet6dev;
+
+	slash = strstr(value, "/");
+	if (slash) {
+		*slash = '\0';
+		netmask = slash + 1;
+		inet6dev->prefix = atoi(netmask);
+	}
+
+	if (!inet_pton(AF_INET6, value, &inet6dev->addr)) {
+		lxc_log_syserror("invalid ipv6 address: %s", value);
+		return -1;
+	}
+
+
+	netdev = lxc_list_first_elem(&network->netdev);
+	lxc_list_add(&netdev->ipv6, list);
+
+	return 0;
+}
+
+static int config_mount(char *value, struct lxc_conf *lxc_conf)
+{
+	if (strlen(value) >= MAXPATHLEN) {
+		lxc_log_error("%s path is too long", value);
+		return -1;
+	}
+
+	lxc_conf->fstab = strdup(value);
+	if (!lxc_conf->fstab) {
+		lxc_log_syserror("failed to duplicate string %s", value);
+		return -1;
+	}
+
+	return 0;
+}
+
+static int config_chroot(char *value, struct lxc_conf *lxc_conf)
+{
+	if (strlen(value) >= MAXPATHLEN) {
+		lxc_log_error("%s path is too long", value);
+		return -1;
+	}
+
+	lxc_conf->chroot = strdup(value);
+	if (!lxc_conf->chroot) {
+		lxc_log_syserror("failed to duplicate string %s", value);
+		return -1;
+	}
+
+	return 0;
+}
+
+static int config_utsname(char *value, struct lxc_conf *lxc_conf)
+{
+	struct utsname *utsname;
+
+	utsname = malloc(sizeof(*utsname));
+	if (!utsname) {
+		lxc_log_syserror("failed to allocate memory");
+		return -1;
+	}
+
+	if (strlen(value) >= sizeof(utsname->nodename)) {
+		lxc_log_error("node name '%s' is too long", 
+			      utsname->nodename);
+		return -1;
+	}
+
+	strcpy(utsname->nodename, value);
+	lxc_conf->utsname = utsname;
+
+	return 0;
+}
+
+static int parse_line(char *buffer, void *data)
+{
+	struct config *config;
+	char *dot;
+	char *key;
+	char *value;
+
+	if (is_line_empty(buffer))
+		return 0;
+
+	buffer += char_left_gc(buffer, strlen(buffer));
+	if (buffer[0] == '#')
+		return 0;
+
+	dot = strstr(buffer, "=");
+	if (!dot) {
+		lxc_log_error("invalid configuration line: %s", buffer);
+		return -1;
+	}
+	
+	*dot = '\0';
+	value = dot + 1;
+
+	key = buffer;
+	key[char_right_gc(key, strlen(key))] = '\0';
+
+	value += char_left_gc(value, strlen(value));
+	value[char_right_gc(value, strlen(value))] = '\0';
+
+	config = getconfig(key);
+	if (!config) {
+		lxc_log_error("unknow key %s", key);
+		return -1;
+	}
+
+	return config->cb(value, data);
+}
+
+static int file_for_each_line(const char *file, file_cb callback, void *data)
+{
+	char buffer[MAXPATHLEN];
+	size_t len = sizeof(buffer);
+	FILE *f;
+	int err = -1;
+
+	f = fopen(file, "r");
+	if (!f) {
+		lxc_log_syserror("failed to open %s", file);
+		return -1;
+	}
+	
+	while (fgets(buffer, len, f))
+		if (callback(buffer, data))
+			goto out;
+	err = 0;
+out:
+	fclose(f);	
+	return err;
+}
+
+int lxc_config_read(const char *file, struct lxc_conf *conf)
+{
+	return file_for_each_line(file, parse_line, conf);
+}
+
+int lxc_config_init(struct lxc_conf *conf)
+{
+	conf->chroot = NULL;
+	conf->fstab = NULL;
+	conf->utsname = NULL;
+	conf->cgroup = NULL;
+	lxc_list_init(&conf->networks);
+	return 0;
+}

src/lxc/lxc_config.h

@@ -0,0 +1,28 @@
+/*
+ * lxc: linux Container library
+ *
+ * (C) Copyright IBM Corp. 2007, 2008
+ *
+ * Authors:
+ * Daniel Lezcano <dlezcano at fr.ibm.com>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library 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
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+
+extern int lxc_config_init(struct lxc_conf *conf);
+extern int lxc_config_read(const char *file, struct lxc_conf *conf);
+
+
+

src/lxc/lxc_create.c

@@ -32,8 +32,7 @@
 #include <net/if.h>
 
 #include <lxc.h>
-
+#include "lxc_config.h"
-#include "config.h"
 
 void usage(char *cmd)
 {
@@ -63,12 +62,12 @@ int main(int argc, char *argv[])
 	if (!name || !file)
 		usage(argv[0]);
 
-	if (config_init(&lxc_conf)) {
+	if (lxc_config_init(&lxc_conf)) {
 		fprintf(stderr, "failed to initialize the configuration\n");
 		return 1;
 	}
 
-	if (config_read(file, &lxc_conf)) {
+	if (lxc_config_read(file, &lxc_conf)) {
 		fprintf(stderr, "invalid configuration file\n");
 		return 1;
 	}

src/lxc/lxc_monitor.c

@@ -90,7 +90,7 @@ int main(int argc, char *argv[])
 		}
 
 		printf("container has changed the state to %d - %s\n", 
-		       state, state2str(state));
+		       state, lxc_state2str(state));
 	}
 	return 0;
 }

src/lxc/lxc_priority.c

@@ -23,6 +23,7 @@
 #include <stdio.h>
 #include <unistd.h>
 #include <libgen.h>
+#include <stdlib.h>
 #include <sys/types.h>
 
 #include <lxc.h>
@@ -58,7 +59,7 @@ int main(int argc, char *argv[])
 		usage(argv[0]);
 
 	if (!priority) {
-		if (lxc_get_priority(name, &prio)) {
+		if (lxc_cgroup_get_priority(name, &prio)) {
 			fprintf(stderr, "failed to retrieve the priority of '%s'\n", name);
 			return 1;
 		}
@@ -68,7 +69,7 @@ int main(int argc, char *argv[])
 	}
 
 	prio = atoi(priority);
-	if (lxc_set_priority(name, prio)) {
+	if (lxc_cgroup_set_priority(name, prio)) {
 		fprintf(stderr, "failed to assign priority  %d to of '%s'", 
 			prio, name);
 		return 1;

src/lxc/lxc_state.c

@@ -59,7 +59,7 @@ int main(int argc, char *argv[])
 		return 1;
 	}
 
-	printf("'%s' is %s\n", name, state2str(state));
+	printf("'%s' is %s\n", name, lxc_state2str(state));
 
 	return 0;
 }

test/Makefile.am

@@ -18,74 +18,79 @@ noinst_PROGRAMS = \
 	lxc_start \
 	lxc_stop \
 	lxc_monitor \
+	lxc_low_monitor \
 	lxc_state
 
 
 tst_list_SOURCES = tst_list.c
 tst_list_LDADD = \
-	$(top_builddir)/src/liblxc/liblxc.a
+	$(top_builddir)/src/liblxc/liblxc.la
 
 confile_SOURCES = confile.c
 confile_LDADD = \
-	$(top_builddir)/src/lxc/config.o \
+	$(top_builddir)/src/lxc/lxc_config.o \
-	$(top_builddir)/src/liblxc/liblxc.a
+	$(top_builddir)/src/liblxc/liblxc.la
 
 conf_SOURCES = conf.c
 conf_LDADD = \
-	$(top_builddir)/src/liblxc/liblxc.a
+	$(top_builddir)/src/liblxc/liblxc.la
 
 movedev_SOURCES = movedev.c
 movedev_LDADD = \
-	$(top_builddir)/src/liblxc/liblxc.a
+	$(top_builddir)/src/liblxc/liblxc.la
 
 dev_SOURCES = dev.c
 dev_LDADD = \
-	$(top_builddir)/src/liblxc/liblxc.a
+	$(top_builddir)/src/liblxc/liblxc.la
 
 forward_SOURCES = forward.c
 forward_LDADD = \
-	$(top_builddir)/src/liblxc/liblxc.a
+	$(top_builddir)/src/liblxc/liblxc.la
 
 proxy_SOURCES = proxy.c
 proxy_LDADD = \
-	$(top_builddir)/src/liblxc/liblxc.a
+	$(top_builddir)/src/liblxc/liblxc.la
 
 veth_SOURCES = veth.c
 veth_LDADD = \
-	$(top_builddir)/src/liblxc/liblxc.a
+	$(top_builddir)/src/liblxc/liblxc.la
 
 macvlan_SOURCES = macvlan.c
 macvlan_LDADD = \
-	$(top_builddir)/src/liblxc/liblxc.a
+	$(top_builddir)/src/liblxc/liblxc.la
 
 ipv4_add_SOURCES = ipv4_add.c
 ipv4_add_LDADD = \
-	$(top_builddir)/src/liblxc/liblxc.a
+	$(top_builddir)/src/liblxc/liblxc.la
 
 ipv6_add_SOURCES = ipv6_add.c
 ipv6_add_LDADD = \
-	$(top_builddir)/src/liblxc/liblxc.a
+	$(top_builddir)/src/liblxc/liblxc.la
 
 lxc_create_SOURCES = lxc_create.c
 lxc_create_LDADD = \
-	$(top_builddir)/src/liblxc/liblxc.a
+	$(top_builddir)/src/liblxc/liblxc.la
 
 lxc_destroy_SOURCES = lxc_destroy.c
 lxc_destroy_LDADD = \
-	$(top_builddir)/src/liblxc/liblxc.a
+	$(top_builddir)/src/liblxc/liblxc.la
 
 lxc_start_SOURCES = lxc_start.c
 lxc_start_LDADD = \
-	$(top_builddir)/src/liblxc/liblxc.a
+	$(top_builddir)/src/liblxc/liblxc.la
 
 lxc_stop_SOURCES = lxc_stop.c
 lxc_stop_LDADD = \
-	$(top_builddir)/src/liblxc/liblxc.a
+	$(top_builddir)/src/liblxc/liblxc.la
 
 lxc_monitor_SOURCES = lxc_monitor.c
 lxc_monitor_LDADD = \
-	$(top_builddir)/src/liblxc/liblxc.a
+	$(top_builddir)/src/liblxc/liblxc.la
+
+lxc_low_monitor_SOURCES = lxc_low_monitor.c
+lxc_low_monitor_LDADD = \
+	$(top_builddir)/src/liblxc/liblxc.la
 
 lxc_state_SOURCES = lxc_state.c
 lxc_state_LDADD = \
-	$(top_builddir)/src/liblxc/liblxc.a
+	$(top_builddir)/src/liblxc/liblxc.la

test/confile.c

@@ -32,7 +32,7 @@
 
 #include <lxc.h>
 
-#include "../src/lxc/config.h"
+#include "../src/lxc/lxc_config.h"
 
 static void usage(const char *cmd)
 {
@@ -60,12 +60,12 @@ int main(int argc, char *argv[])
 	if (!file || !name)
 		usage(argv[0]);
 
-	if (config_init(&lxc_conf)) {
+	if (lxc_config_init(&lxc_conf)) {
 		fprintf(stderr, "failed to initialize configuration structure\n");
 		return 1;
 	}
 
-	if (config_read(file, &lxc_conf)) {
+	if (lxc_config_read(file, &lxc_conf)) {
 		fprintf(stderr, "failed to read configuration\n");
 		return 1;
 	}

test/lxc_low_monitor.c

@@ -0,0 +1,65 @@
+/*
+ * lxc: linux Container library
+ *
+ * (C) Copyright IBM Corp. 2007, 2008
+ *
+ * Authors:
+ * Daniel Lezcano <dlezcano at fr.ibm.com>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library 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
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+#include <stdio.h>
+#include <unistd.h>
+#include <string.h>
+#include <libgen.h>
+
+#include <lxc.h>
+
+void usage(char *cmd)
+{
+	fprintf(stderr, "%s <command>\n", basename(cmd));
+	fprintf(stderr, "\t -n <name>   : name of the container\n");
+	_exit(1);
+}
+
+int main(int argc, char *argv[])
+{
+	char opt;
+	char *name = NULL;
+	int fd;
+
+	while ((opt = getopt(argc, argv, "n:")) != -1) {
+		switch (opt) {
+		case 'n':
+			name = optarg;
+			break;
+		}
+	}
+
+	if (!name)
+		usage(argv[0]);
+
+	fd = lxc_monitor_open(name);
+	if (fd < 0) {
+		fprintf(stderr, "failed to open monitor\n");
+		return -1;
+	}
+	
+	for (;;) {
+		lxc_state_t state;
+		lxc_monitor_read(fd, &state);
+		printf("received changing state '%s'\n", lxc_state2str(state));
+	}
+}

test/lxc_monitor.c

@@ -92,7 +92,7 @@ int main(int argc, char *argv[])
 		}
 
 		printf("container has changed the state to %d - %s\n", 
-		       state, state2str(state));
+		       state, lxc_state2str(state));
 	}
 
 	return 0;

test/lxc_state.c

@@ -58,7 +58,7 @@ int main(int argc, char *argv[])
 	}
 
 	printf("container has the state to %d - %s\n",
-	       state, state2str(state));
+	       state, lxc_state2str(state));
 
 
 	return 0;