Revert "Don't let check_disk hang on hanging file systems"

This reverts commit 6986aa1d0a352d8d02eed4896034631fffd25a27.  That
commit leads to issues on non-Linux systems, and it seems to not
(always) work as expected on Linux, either.

NEWS

@@ -6,7 +6,6 @@ This file documents the major additions and syntax changes between releases.
 	  thresholds
 	New check_snmp "-N" option to specify SNMPv3 context name
 	New check_nt "-l" parameters: seconds|minutes|hours|days
-	Make sure check_disk won't hang on hanging (network) file systems
 	New check_mailq -s option which tells the plugin to use sudo(8)
 	New -W/-C option for check_ldap to check number of entries (Gerhard Lausser)
 	The check_http -S/--ssl option now accepts the arguments "1.1" and "1.2"

configure.ac

@@ -162,12 +162,6 @@ AC_CHECK_LIB(socket,socket,SOCKETLIBS="$SOCKETLIBS -lsocket")
 AC_CHECK_LIB(resolv,main,SOCKETLIBS="$SOCKETLIBS -lresolv")
 AC_SUBST(SOCKETLIBS)
 
-dnl Check for POSIX thread libraries
-AC_CHECK_HEADERS(pthread.h)
-AC_CHECK_LIB(pthread,pthread_create,THREADLIBS="-lpthread",
-             AC_CHECK_LIB(pthread,pthread_create,THREADLIBS="-lpthread -lrt",-lrt))
-AC_SUBST(THREADLIBS)
-
 dnl
 dnl check for math-related functions needing -lm
 AC_CHECK_HEADERS(math.h)

plugins/Makefile.am

@@ -70,8 +70,8 @@ test-debug:
 check_apt_LDADD = $(BASEOBJS)
 check_cluster_LDADD = $(BASEOBJS)
 check_dbi_LDADD = $(NETLIBS) $(DBILIBS)
-check_dig_LDADD = $(NETLIBS) $(MATHLIBS)
-check_disk_LDADD = $(BASEOBJS) $(THREADLIBS)
+check_dig_LDADD = $(NETLIBS)
+check_disk_LDADD = $(BASEOBJS)
 check_dns_LDADD = $(NETLIBS)
 check_dummy_LDADD = $(BASEOBJS)
 check_fping_LDADD = $(NETLIBS)

plugins/check_disk.c

@@ -51,9 +51,6 @@ const char *email = "devel@nagios-plugins.org";
 # include <limits.h>
 #endif
 #include "regex.h"
-#if HAVE_PTHREAD_H
-# include <pthread.h>
-#endif
 
 #ifdef __CYGWIN__
 # include <windows.h>
@@ -133,7 +130,6 @@ void print_help (void);
 void print_usage (void);
 double calculate_percent(uintmax_t, uintmax_t);
 void stat_path (struct parameter_list *p);
-void *do_stat_path (void *p);
 void get_stats (struct parameter_list *p, struct fs_usage *fsp);
 void get_path_stats (struct parameter_list *p, struct fs_usage *fsp);
 
@@ -988,44 +984,6 @@ print_usage (void)
 void
 stat_path (struct parameter_list *p)
 {
-#ifdef HAVE_PTHREAD_H
-  pthread_t stat_thread;
-  int statdone = 0;
-  int timer = timeout_interval;
-  struct timespec req, rem;
-
-  req.tv_sec = 0;
-  pthread_create(&stat_thread, NULL, do_stat_path, p);
-  while (timer-- > 0) {
-    req.tv_nsec = 10000000;
-    nanosleep(&req, &rem);
-    if (pthread_kill(stat_thread, 0)) {
-      statdone = 1;
-      break;
-    } else {
-      req.tv_nsec = 990000000;
-      nanosleep(&req, &rem);
-    }
-  }
-  if (statdone == 1) {
-    pthread_join(stat_thread, NULL);
-  } else {
-    pthread_detach(stat_thread);
-    if (verbose >= 3)
-      printf("stat did not return within %ds on %s\n", timeout_interval, p->name);
-    printf("DISK %s - ", _("CRITICAL"));
-    die (STATE_CRITICAL, _("%s %s: %s\n"), p->name, _("hangs"), _("Timeout"));
-  }
-#else
-  do_stat_path(p);
-#endif
-}
-
-void *
-do_stat_path (void *in)
-{
-  struct parameter_list *p = in;
-
   /* Stat entry to check that dir exists and is accessible */
   if (verbose >= 3)
     printf("calling stat on %s\n", p->name);
@@ -1035,7 +993,6 @@ do_stat_path (void *in)
     printf("DISK %s - ", _("CRITICAL"));
     die (STATE_CRITICAL, _("%s %s: %s\n"), p->name, _("is not accessible"), strerror(errno));
   }
-  return NULL;
 }