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[libvirt] [PATCH 2/5] Move pidfile functions into util/virpidfile.{c, h}



From: "Daniel P. Berrange" <berrange redhat com>

The functions for manipulating pidfiles are in util/util.{c,h}.
We will shortly be adding some further pidfile related functions.
To avoid further growing util.c, this moves the pidfile related
functions into a dedicated virpidfile.{c,h}. The functions are
also all renamed to have 'virPidFile' as their name prefix

* util/util.h, util/util.c: Remove all pidfile code
* util/virpidfile.c, util/virpidfile.h: Add new APIs for pidfile
  handling.
* lxc/lxc_controller.c, lxc/lxc_driver.c, network/bridge_driver.c,
  qemu/qemu_process.c: Add virpidfile.h include and adapt for API
  renames
---
 src/Makefile.am             |    1 +
 src/libvirt_private.syms    |   14 ++-
 src/lxc/lxc_controller.c    |    5 +-
 src/lxc/lxc_driver.c        |    5 +-
 src/network/bridge_driver.c |   19 ++--
 src/qemu/qemu_process.c     |    5 +-
 src/util/command.c          |    3 +-
 src/util/util.c             |  152 ---------------------------------
 src/util/util.h             |   15 ---
 src/util/virpidfile.c       |  199 +++++++++++++++++++++++++++++++++++++++++++
 src/util/virpidfile.h       |   50 +++++++++++
 11 files changed, 281 insertions(+), 187 deletions(-)
 create mode 100644 src/util/virpidfile.c
 create mode 100644 src/util/virpidfile.h

diff --git a/src/Makefile.am b/src/Makefile.am
index 009ff25..cf7c003 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -84,6 +84,7 @@ UTIL_SOURCES =							\
 		util/util.c util/util.h				\
 		util/viraudit.c util/viraudit.h			\
 		util/virfile.c util/virfile.h			\
+		util/virpidfile.c util/virpidfile.h		\
 		util/xml.c util/xml.h				\
 		util/virterror.c util/virterror_internal.h	\
 		util/virkeycode.c util/virkeycode.h		\
diff --git a/src/libvirt_private.syms b/src/libvirt_private.syms
index 261f3e0..7a96c1e 100644
--- a/src/libvirt_private.syms
+++ b/src/libvirt_private.syms
@@ -1033,7 +1033,6 @@ virEventAddHandle;
 virEventRemoveHandle;
 virFileAbsPath;
 virFileBuildPath;
-virFileDeletePid;
 virFileExists;
 virFileFindMountPoint;
 virFileHasSuffix;
@@ -1044,11 +1043,8 @@ virFileMakePath;
 virFileMatchesNameSuffix;
 virFileOpenAs;
 virFileOpenTty;
-virFilePid;
 virFileReadAll;
 virFileReadLimFD;
-virFileReadPid;
-virFileReadPidPath;
 virFileResolveLink;
 virFileSanitizePath;
 virFileStripSuffix;
@@ -1123,6 +1119,16 @@ virFileFclose;
 virFileFdopen;
 
 
+# virpidfile.h
+virPidFileBuildPath;
+virPidFileRead;
+virPidFileReadPath;
+virPidFileWrite;
+virPidFileWritePath;
+virPidFileDelete;
+virPidFileDeletePath;
+
+
 # virterror_internal.h
 virDispatchError;
 virErrorMsg;
diff --git a/src/lxc/lxc_controller.c b/src/lxc/lxc_controller.c
index 45b4c70..5028251 100644
--- a/src/lxc/lxc_controller.c
+++ b/src/lxc/lxc_controller.c
@@ -56,6 +56,7 @@
 #include "memory.h"
 #include "util.h"
 #include "virfile.h"
+#include "virpidfile.h"
 
 #define VIR_FROM_THIS VIR_FROM_LXC
 
@@ -1136,7 +1137,7 @@ int main(int argc, char *argv[])
             goto cleanup;
 
         if (pid > 0) {
-            if ((rc = virFileWritePid(LXC_STATE_DIR, name, pid)) < 0) {
+            if ((rc = virPidFileWrite(LXC_STATE_DIR, name, pid)) < 0) {
                 virReportSystemError(-rc,
                                      _("Unable to write pid file '%s/%s.pid'"),
                                      LXC_STATE_DIR, name);
@@ -1179,7 +1180,7 @@ int main(int argc, char *argv[])
 
 cleanup:
     if (def)
-        virFileDeletePid(LXC_STATE_DIR, def->name);
+        virPidFileDelete(LXC_STATE_DIR, def->name);
     lxcControllerCleanupInterfaces(nveths, veths);
     if (sockpath)
         unlink(sockpath);
diff --git a/src/lxc/lxc_driver.c b/src/lxc/lxc_driver.c
index 2d94309..bb560b6 100644
--- a/src/lxc/lxc_driver.c
+++ b/src/lxc/lxc_driver.c
@@ -50,6 +50,7 @@
 #include "stats_linux.h"
 #include "hooks.h"
 #include "virfile.h"
+#include "virpidfile.h"
 #include "fdstream.h"
 #include "domain_audit.h"
 #include "domain_nwfilter.h"
@@ -1030,7 +1031,7 @@ static void lxcVmCleanup(lxc_driver_t *driver,
     virEventRemoveHandle(priv->monitorWatch);
     VIR_FORCE_CLOSE(priv->monitor);
 
-    virFileDeletePid(driver->stateDir, vm->def->name);
+    virPidFileDelete(driver->stateDir, vm->def->name);
     virDomainDeleteConfig(driver->stateDir, NULL, vm);
 
     virDomainObjSetState(vm, VIR_DOMAIN_SHUTOFF, reason);
@@ -1612,7 +1613,7 @@ static int lxcVmStart(virConnectPtr conn,
         goto cleanup;
 
     /* And get its pid */
-    if ((r = virFileReadPid(driver->stateDir, vm->def->name, &vm->pid)) < 0) {
+    if ((r = virPidFileRead(driver->stateDir, vm->def->name, &vm->pid)) < 0) {
         virReportSystemError(-r,
                              _("Failed to read pid file %s/%s.pid"),
                              driver->stateDir, vm->def->name);
diff --git a/src/network/bridge_driver.c b/src/network/bridge_driver.c
index c90db63..8b27320 100644
--- a/src/network/bridge_driver.c
+++ b/src/network/bridge_driver.c
@@ -49,6 +49,7 @@
 #include "network_conf.h"
 #include "driver.h"
 #include "buf.h"
+#include "virpidfile.h"
 #include "util.h"
 #include "command.h"
 #include "memory.h"
@@ -218,7 +219,7 @@ networkFindActiveConfigs(struct network_driver *driver) {
             if (obj->def->ips && (obj->def->nips > 0)) {
                 char *pidpath, *radvdpidbase;
 
-                if (virFileReadPid(NETWORK_PID_DIR, obj->def->name,
+                if (virPidFileRead(NETWORK_PID_DIR, obj->def->name,
                                    &obj->dnsmasqPid) == 0) {
                     /* Check that it's still alive */
                     if (kill(obj->dnsmasqPid, 0) != 0)
@@ -236,7 +237,7 @@ networkFindActiveConfigs(struct network_driver *driver) {
                     virReportOOMError();
                     goto cleanup;
                 }
-                if (virFileReadPid(NETWORK_PID_DIR, radvdpidbase,
+                if (virPidFileRead(NETWORK_PID_DIR, radvdpidbase,
                                    &obj->radvdPid) == 0) {
                     /* Check that it's still alive */
                     if (kill(obj->radvdPid, 0) != 0)
@@ -728,7 +729,7 @@ networkStartDhcpDaemon(virNetworkObjPtr network)
         goto cleanup;
     }
 
-    if (!(pidfile = virFilePid(NETWORK_PID_DIR, network->def->name))) {
+    if (!(pidfile = virPidFileBuildPath(NETWORK_PID_DIR, network->def->name))) {
         virReportOOMError();
         goto cleanup;
     }
@@ -765,7 +766,7 @@ networkStartDhcpDaemon(virNetworkObjPtr network)
      * pid
      */
 
-    ret = virFileReadPid(NETWORK_PID_DIR, network->def->name,
+    ret = virPidFileRead(NETWORK_PID_DIR, network->def->name,
                          &network->dnsmasqPid);
     if (ret < 0)
         goto cleanup;
@@ -818,7 +819,7 @@ networkStartRadvd(virNetworkObjPtr network)
         virReportOOMError();
         goto cleanup;
     }
-    if (!(pidfile = virFilePid(NETWORK_PID_DIR, radvdpidbase))) {
+    if (!(pidfile = virPidFileBuildPath(NETWORK_PID_DIR, radvdpidbase))) {
         virReportOOMError();
         goto cleanup;
     }
@@ -885,7 +886,7 @@ networkStartRadvd(virNetworkObjPtr network)
      * a dummy pidfile name - virCommand will create the pidfile we
      * want to use (this is necessary because radvd's internal
      * daemonization and pidfile creation causes a race, and the
-     * virFileReadPid() below will fail if we use them).
+     * virPidFileRead() below will fail if we use them).
      * Unfortunately, it isn't possible to tell radvd to not create
      * its own pidfile, so we just let it do so, with a slightly
      * different name. Unused, but harmless.
@@ -901,7 +902,7 @@ networkStartRadvd(virNetworkObjPtr network)
     if (virCommandRun(cmd, NULL) < 0)
         goto cleanup;
 
-    if (virFileReadPid(NETWORK_PID_DIR, radvdpidbase,
+    if (virPidFileRead(NETWORK_PID_DIR, radvdpidbase,
                        &network->radvdPid) < 0)
         goto cleanup;
 
@@ -1919,7 +1920,7 @@ static int networkShutdownNetworkVirtual(struct network_driver *driver,
         if (!(radvdpidbase = networkRadvdPidfileBasename(network->def->name))) {
             virReportOOMError();
         } else {
-            virFileDeletePid(NETWORK_PID_DIR, radvdpidbase);
+            virPidFileDelete(NETWORK_PID_DIR, radvdpidbase);
             VIR_FREE(radvdpidbase);
         }
     }
@@ -2486,7 +2487,7 @@ static int networkUndefine(virNetworkPtr net) {
             virReportOOMError();
             goto cleanup;
         }
-        virFileDeletePid(NETWORK_PID_DIR, radvdpidbase);
+        virPidFileDelete(NETWORK_PID_DIR, radvdpidbase);
         VIR_FREE(radvdpidbase);
 
     }
diff --git a/src/qemu/qemu_process.c b/src/qemu/qemu_process.c
index 30c8b28..6f54b30 100644
--- a/src/qemu/qemu_process.c
+++ b/src/qemu/qemu_process.c
@@ -50,6 +50,7 @@
 #include "memory.h"
 #include "hooks.h"
 #include "virfile.h"
+#include "virpidfile.h"
 #include "util.h"
 #include "c-ctype.h"
 #include "nodeinfo.h"
@@ -2771,7 +2772,7 @@ int qemuProcessStart(virConnectPtr conn,
     priv->gotShutdown = false;
 
     VIR_FREE(priv->pidfile);
-    if (!(priv->pidfile = virFilePid(driver->stateDir, vm->def->name))) {
+    if (!(priv->pidfile = virPidFileBuildPath(driver->stateDir, vm->def->name))) {
         virReportSystemError(errno,
                              "%s", _("Failed to build pidfile path."));
         goto cleanup;
@@ -2880,7 +2881,7 @@ int qemuProcessStart(virConnectPtr conn,
 
     /* wait for qemu process to show up */
     if (ret == 0) {
-        if (virFileReadPidPath(priv->pidfile, &vm->pid) < 0) {
+        if (virPidFileReadPath(priv->pidfile, &vm->pid) < 0) {
             qemuReportError(VIR_ERR_INTERNAL_ERROR,
                             _("Domain %s didn't show up"), vm->def->name);
             ret = -1;
diff --git a/src/util/command.c b/src/util/command.c
index 26fcb28..d390478 100644
--- a/src/util/command.c
+++ b/src/util/command.c
@@ -39,6 +39,7 @@
 #include "util.h"
 #include "logging.h"
 #include "virfile.h"
+#include "virpidfile.h"
 #include "buf.h"
 #include "ignore-value.h"
 #include "verify.h"
@@ -493,7 +494,7 @@ virExecWithHook(const char *const*argv,
         }
 
         if (pid > 0) {
-            if (pidfile && (virFileWritePidPath(pidfile,pid) < 0)) {
+            if (pidfile && (virPidFileWritePath(pidfile,pid) < 0)) {
                 kill(pid, SIGTERM);
                 usleep(500*1000);
                 kill(pid, SIGTERM);
diff --git a/src/util/util.c b/src/util/util.c
index 2e2a6a0..e3b216f 100644
--- a/src/util/util.c
+++ b/src/util/util.c
@@ -1151,158 +1151,6 @@ int virFileOpenTtyAt(const char *ptmx ATTRIBUTE_UNUSED,
 }
 #endif
 
-char* virFilePid(const char *dir, const char* name)
-{
-    char *pidfile;
-    if (virAsprintf(&pidfile, "%s/%s.pid", dir, name) < 0)
-        return NULL;
-    return pidfile;
-}
-
-int virFileWritePid(const char *dir,
-                    const char *name,
-                    pid_t pid)
-{
-    int rc;
-    char *pidfile = NULL;
-
-    if (name == NULL || dir == NULL) {
-        rc = -EINVAL;
-        goto cleanup;
-    }
-
-    if (virFileMakePath(dir) < 0) {
-        rc = -errno;
-        goto cleanup;
-    }
-
-    if (!(pidfile = virFilePid(dir, name))) {
-        rc = -ENOMEM;
-        goto cleanup;
-    }
-
-    rc = virFileWritePidPath(pidfile, pid);
-
-cleanup:
-    VIR_FREE(pidfile);
-    return rc;
-}
-
-int virFileWritePidPath(const char *pidfile,
-                        pid_t pid)
-{
-    int rc;
-    int fd;
-    FILE *file = NULL;
-
-    if ((fd = open(pidfile,
-                   O_WRONLY | O_CREAT | O_TRUNC,
-                   S_IRUSR | S_IWUSR)) < 0) {
-        rc = -errno;
-        goto cleanup;
-    }
-
-    if (!(file = VIR_FDOPEN(fd, "w"))) {
-        rc = -errno;
-        VIR_FORCE_CLOSE(fd);
-        goto cleanup;
-    }
-
-    if (fprintf(file, "%d", pid) < 0) {
-        rc = -errno;
-        goto cleanup;
-    }
-
-    rc = 0;
-
-cleanup:
-    if (VIR_FCLOSE(file) < 0)
-        rc = -errno;
-
-    return rc;
-}
-
-
-int virFileReadPidPath(const char *path,
-                       pid_t *pid)
-{
-    FILE *file;
-    int rc;
-
-    *pid = 0;
-
-    if (!(file = fopen(path, "r"))) {
-        rc = -errno;
-        goto cleanup;
-    }
-
-    if (fscanf(file, "%d", pid) != 1) {
-        rc = -EINVAL;
-        VIR_FORCE_FCLOSE(file);
-        goto cleanup;
-    }
-
-    if (VIR_FCLOSE(file) < 0) {
-        rc = -errno;
-        goto cleanup;
-    }
-
-    rc = 0;
-
- cleanup:
-    return rc;
-}
-
-
-int virFileReadPid(const char *dir,
-                   const char *name,
-                   pid_t *pid)
-{
-    int rc;
-    char *pidfile = NULL;
-    *pid = 0;
-
-    if (name == NULL || dir == NULL) {
-        rc = -EINVAL;
-        goto cleanup;
-    }
-
-    if (!(pidfile = virFilePid(dir, name))) {
-        rc = -ENOMEM;
-        goto cleanup;
-    }
-
-    rc = virFileReadPidPath(pidfile, pid);
-
- cleanup:
-    VIR_FREE(pidfile);
-    return rc;
-}
-
-int virFileDeletePid(const char *dir,
-                     const char *name)
-{
-    int rc = 0;
-    char *pidfile = NULL;
-
-    if (name == NULL || dir == NULL) {
-        rc = -EINVAL;
-        goto cleanup;
-    }
-
-    if (!(pidfile = virFilePid(dir, name))) {
-        rc = -ENOMEM;
-        goto cleanup;
-    }
-
-    if (unlink(pidfile) < 0 && errno != ENOENT)
-        rc = -errno;
-
-cleanup:
-    VIR_FREE(pidfile);
-    return rc;
-}
-
 
 /*
  * Creates an absolute path for a potentially relative path.
diff --git a/src/util/util.h b/src/util/util.h
index af8b15d..e76da9c 100644
--- a/src/util/util.h
+++ b/src/util/util.h
@@ -120,21 +120,6 @@ int virFileOpenTtyAt(const char *ptmx,
                      char **ttyName,
                      int rawmode);
 
-char* virFilePid(const char *dir,
-                 const char *name);
-
-int virFileWritePidPath(const char *path,
-                        pid_t pid) ATTRIBUTE_RETURN_CHECK;
-int virFileWritePid(const char *dir,
-                    const char *name,
-                    pid_t pid) ATTRIBUTE_RETURN_CHECK;
-int virFileReadPidPath(const char *path,
-                       pid_t *pid) ATTRIBUTE_RETURN_CHECK;
-int virFileReadPid(const char *dir,
-                   const char *name,
-                   pid_t *pid) ATTRIBUTE_RETURN_CHECK;
-int virFileDeletePid(const char *dir,
-                     const char *name);
 
 char *virArgvToString(const char *const *argv);
 
diff --git a/src/util/virpidfile.c b/src/util/virpidfile.c
new file mode 100644
index 0000000..25c3272
--- /dev/null
+++ b/src/util/virpidfile.c
@@ -0,0 +1,199 @@
+/*
+ * virpidfile.c: manipulation of pidfiles
+ *
+ * Copyright (C) 2010-2011 Red Hat, Inc.
+ * Copyright (C) 2006, 2007 Binary Karma
+ * Copyright (C) 2006 Shuveb Hussain
+ *
+ * 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 <config.h>
+
+#include <fcntl.h>
+
+#include "virpidfile.h"
+#include "virfile.h"
+#include "memory.h"
+#include "util.h"
+
+
+char *virPidFileBuildPath(const char *dir, const char* name)
+{
+    char *pidfile;
+
+    if (virAsprintf(&pidfile, "%s/%s.pid", dir, name) < 0)
+        return NULL;
+
+    return pidfile;
+}
+
+
+int virPidFileWritePath(const char *pidfile,
+                        pid_t pid)
+{
+    int rc;
+    int fd;
+    FILE *file = NULL;
+
+    if ((fd = open(pidfile,
+                   O_WRONLY | O_CREAT | O_TRUNC,
+                   S_IRUSR | S_IWUSR)) < 0) {
+        rc = -errno;
+        goto cleanup;
+    }
+
+    if (!(file = VIR_FDOPEN(fd, "w"))) {
+        rc = -errno;
+        VIR_FORCE_CLOSE(fd);
+        goto cleanup;
+    }
+
+    if (fprintf(file, "%d", pid) < 0) {
+        rc = -errno;
+        goto cleanup;
+    }
+
+    rc = 0;
+
+cleanup:
+    if (VIR_FCLOSE(file) < 0)
+        rc = -errno;
+
+    return rc;
+}
+
+
+int virPidFileWrite(const char *dir,
+                    const char *name,
+                    pid_t pid)
+{
+    int rc;
+    char *pidfile = NULL;
+
+    if (name == NULL || dir == NULL) {
+        rc = -EINVAL;
+        goto cleanup;
+    }
+
+    if (virFileMakePath(dir) < 0) {
+        rc = -errno;
+        goto cleanup;
+    }
+
+    if (!(pidfile = virPidFileBuildPath(dir, name))) {
+        rc = -ENOMEM;
+        goto cleanup;
+    }
+
+    rc = virPidFileWritePath(pidfile, pid);
+
+cleanup:
+    VIR_FREE(pidfile);
+    return rc;
+}
+
+
+int virPidFileReadPath(const char *path,
+                       pid_t *pid)
+{
+    FILE *file;
+    int rc;
+
+    *pid = 0;
+
+    if (!(file = fopen(path, "r"))) {
+        rc = -errno;
+        goto cleanup;
+    }
+
+    if (fscanf(file, "%d", pid) != 1) {
+        rc = -EINVAL;
+        VIR_FORCE_FCLOSE(file);
+        goto cleanup;
+    }
+
+    if (VIR_FCLOSE(file) < 0) {
+        rc = -errno;
+        goto cleanup;
+    }
+
+    rc = 0;
+
+ cleanup:
+    return rc;
+}
+
+
+int virPidFileRead(const char *dir,
+                   const char *name,
+                   pid_t *pid)
+{
+    int rc;
+    char *pidfile = NULL;
+    *pid = 0;
+
+    if (name == NULL || dir == NULL) {
+        rc = -EINVAL;
+        goto cleanup;
+    }
+
+    if (!(pidfile = virPidFileBuildPath(dir, name))) {
+        rc = -ENOMEM;
+        goto cleanup;
+    }
+
+    rc = virPidFileReadPath(pidfile, pid);
+
+ cleanup:
+    VIR_FREE(pidfile);
+    return rc;
+}
+
+
+int virPidFileDeletePath(const char *pidfile)
+{
+    int rc = 0;
+
+    if (unlink(pidfile) < 0 && errno != ENOENT)
+        rc = -errno;
+
+    return rc;
+}
+
+
+int virPidFileDelete(const char *dir,
+                     const char *name)
+{
+    int rc = 0;
+    char *pidfile = NULL;
+
+    if (name == NULL || dir == NULL) {
+        rc = -EINVAL;
+        goto cleanup;
+    }
+
+    if (!(pidfile = virPidFileBuildPath(dir, name))) {
+        rc = -ENOMEM;
+        goto cleanup;
+    }
+
+    rc = virPidFileDeletePath(pidfile);
+
+cleanup:
+    VIR_FREE(pidfile);
+    return rc;
+}
diff --git a/src/util/virpidfile.h b/src/util/virpidfile.h
new file mode 100644
index 0000000..e28a3c1
--- /dev/null
+++ b/src/util/virpidfile.h
@@ -0,0 +1,50 @@
+/*
+ * virpidfile.h: manipulation of pidfiles
+ *
+ * Copyright (C) 2010-2011 Red Hat, Inc.
+ * Copyright (C) 2006, 2007 Binary Karma
+ * Copyright (C) 2006 Shuveb Hussain
+ *
+ * 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
+ *
+ */
+
+#ifndef __VIR_PIDFILE_H__
+# define __VIR_PIDFILE_H__
+
+# include <sys/types.h>
+# include "internal.h"
+
+char *virPidFileBuildPath(const char *dir,
+                          const char *name);
+
+int virPidFileWritePath(const char *path,
+                        pid_t pid) ATTRIBUTE_RETURN_CHECK;
+int virPidFileWrite(const char *dir,
+                    const char *name,
+                    pid_t pid) ATTRIBUTE_RETURN_CHECK;
+
+int virPidFileReadPath(const char *path,
+                       pid_t *pid) ATTRIBUTE_RETURN_CHECK;
+int virPidFileRead(const char *dir,
+                   const char *name,
+                   pid_t *pid) ATTRIBUTE_RETURN_CHECK;
+
+int virPidFileDeletePath(const char *path);
+int virPidFileDelete(const char *dir,
+                     const char *name);
+
+
+#endif /* __VIR_PIDFILE_H__ */
-- 
1.7.6


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