File pacemaker-libcrmcommon-pacemakerd-kernel-task-n... of Package pacemaker.26413

Overview Repositories Revisions Requests Users Attributes Meta

File pacemaker-libcrmcommon-pacemakerd-kernel-task-name-is-at-most-15-characters.patch of Package pacemaker.26413

commit d173079fe679ce0c67b72d921d624a582be4bc5f
Author: Ken Gaillot <kgaillot@redhat.com>
Date:   Wed May 2 10:29:52 2018 -0500

Fix: libcrmcommon,pacemakerd: kernel task name is at most 15 characters
    
    /proc/PID/status gives only up to 15 characters for the process name.
    Change crm_procfs_process_info() to reflect this. Also, fix to handle
    spaces in the name (though that's not an issue for current usage).
    
    Similarly, only compare up to 15 characters against the result in pacemakerd,
    which fixes a regression introduced in 2.0.0-rc3 making pacemakerd unable to
    locate existing daemon processes at start-up.

Index: pacemaker-1.1.18+20180430.b12c320f5/daemons/pacemakerd/pacemakerd.c
===================================================================
--- pacemaker-1.1.18+20180430.b12c320f5.orig/daemons/pacemakerd/pacemakerd.c
+++ pacemaker-1.1.18+20180430.b12c320f5/daemons/pacemakerd/pacemakerd.c
@@ -703,7 +703,7 @@ find_and_track_existing_processes(void)
     DIR *dp;
     struct dirent *entry;
     bool start_tracker = FALSE;
-    char entry_name[64];
+    char entry_name[16];
 
     dp = opendir("/proc");
     if (!dp) {
@@ -729,7 +729,9 @@ find_and_track_existing_processes(void)
             if (pcmk_children[i].flag == crm_proc_stonith_ng) {
                 name = "stonithd";
             }
-            if (safe_str_eq(entry_name, name) && (crm_pid_active(pid, NULL) == 1)) {
+            if (!strncmp(entry_name, name, 15)
+                && (crm_pid_active(pid, NULL) == 1)) {
+
                 crm_notice("Tracking existing %s process (pid=%d)", name, pid);
                 pcmk_children[i].pid = pid;
                 pcmk_children[i].active_before_startup = TRUE;
Index: pacemaker-1.1.18+20180430.b12c320f5/lib/common/procfs.c
===================================================================
--- pacemaker-1.1.18+20180430.b12c320f5.orig/lib/common/procfs.c
+++ pacemaker-1.1.18+20180430.b12c320f5/lib/common/procfs.c
@@ -1,19 +1,8 @@
 /*
- * Copyright (C) 2015 Andrew Beekhof <andrew@beekhof.net>
+ * Copyright 2015-2018 Andrew Beekhof <andrew@beekhof.net>
  *
- * 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., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+ * This source code is licensed under the GNU Lesser General Public License
+ * version 2.1 or later (LGPLv2.1+) WITHOUT ANY WARRANTY.
  */
 
 #include <crm_internal.h>
@@ -35,13 +24,16 @@
  * \brief Get process ID and name associated with a /proc directory entry
  *
  * \param[in]  entry    Directory entry (must be result of readdir() on /proc)
- * \param[out] name     If not NULL, a char[64] to hold the process name
+ * \param[out] name     If not NULL, a char[16] to hold the process name
  * \param[out] pid      If not NULL, will be set to process ID of entry
  *
  * \return 0 on success, -1 if entry is not for a process or info not found
  *
  * \note This should be called only on Linux systems, as not all systems that
- *       support /proc store process names and IDs in the same way.
+ *       support /proc store process names and IDs in the same way. The kernel
+ *       limits the process name to the first 15 characters (plus terminator).
+ *       It would be nice if there were a public kernel API constant for that
+ *       limit, but there isn't.
  */
 int
 crm_procfs_process_info(struct dirent *entry, char *name, int *pid)
@@ -49,7 +41,7 @@ crm_procfs_process_info(struct dirent *e
     int fd, local_pid;
     FILE *file;
     struct stat statbuf;
-    char key[16] = { 0 }, procpath[128] = { 0 };
+    char procpath[128] = { 0 };
 
     /* We're only interested in entries whose name is a PID,
      * so skip anything non-numeric or that is too long.
@@ -92,11 +84,11 @@ crm_procfs_process_info(struct dirent *e
         if (!file) {
             return -1;
         }
-        if ((fscanf(file, "%15s%63s", key, name) != 2)
-            || safe_str_neq(key, "Name:")) {
+        if (fscanf(file, "Name:\t%15[^\n]", name) != 1) {
             fclose(file);
             return -1;
         }
+        name[15] = 0;
         fclose(file);
     }

Places

File pacemaker-libcrmcommon-pacemakerd-kernel-task-name-is-at-most-15-characters.patch of Package pacemaker.26413

Places