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I tried to compile this on Ubuntu 14.04 and got an error, anybody know how to fix it?

./configure --with-ssl=/usr/bin/openssl --with-ssl-lib=/usr/lib/x86_64-linux-gnu --prefix=/etc/nagios3 --enable-command-args

make all
gcc -g -O2 -I/usr/include/openssl -DHAVE_CONFIG_H -I ../include -I ./../include -o nrpe ./nrpe.c ./utils.c ./acl.c -L/usr/lib/x86_64-linux-gnu -lssl -lcrypto -lnsl
./nrpe.c: In function ‘init_ssl’:
./nrpe.c:319:9: warning: format ‘%s’ expects argument of type ‘char *’, but argument 4 has type ‘int’ [-Wformat=]
sslprm.cert_file, ERR_error_string(x, NULL));
^
./nrpe.c: In function ‘handle_conn_ssl’:
./nrpe.c:1754:9: warning: format ‘%s’ expects argument of type ‘char *’, but argument 4 has type ‘int’ [-Wformat=]
remote_host, ERR_reason_error_string(x));
^
./nrpe.c: In function ‘main’:
./nrpe.c:168:9: warning: ignoring return value of ‘getcwd’, declared with attribute warn_unused_result [-Wunused-result]
getcwd(config_file, sizeof(config_file));
^
./nrpe.c: In function ‘set_stdio_sigs’:
./nrpe.c:553:7: warning: ignoring return value of ‘chdir’, declared with attribute warn_unused_result [-Wunused-result]
chdir("/");
^
./nrpe.c: In function ‘my_system’:
./nrpe.c:1994:6: warning: ignoring return value of ‘pipe’, declared with attribute warn_unused_result [-Wunused-result]
pipe(fd); /* create a pipe */
^
In file included from ./nrpe.c:27:0:
../include/config.h:110:28: warning: ignoring return value of ‘seteuid’, declared with attribute warn_unused_result [-Wunused-result]
#define SETEUID(id) seteuid(id)
^
./nrpe.c:2026:3: note: in expansion of macro ‘SETEUID’
SETEUID(0); /* get root back so the next call works correctly */
^
./nrpe.c:2050:9: warning: ignoring return value of ‘write’, declared with attribute warn_unused_result [-Wunused-result]
write(fd[1], buffer, strlen(buffer) + 1);
^
./nrpe.c:2058:10: warning: ignoring return value of ‘write’, declared with attribute warn_unused_result [-Wunused-result]
write(fd[1], buffer, bytes_read);
^
./nrpe.c:2061:9: warning: ignoring return value of ‘write’, declared with attribute warn_unused_result [-Wunused-result]
write(fd[1], "", 1);
^
./nrpe.c: In function ‘write_pid_file’:
./nrpe.c:2267:8: warning: ignoring return value of ‘write’, declared with attribute warn_unused_result [-Wunused-result]
write(fd, pbuf, strlen(pbuf));
^
In file included from ./nrpe.c:27:0:
./nrpe.c: In function ‘remove_pid_file’:
../include/config.h:110:28: warning: ignoring return value of ‘seteuid’, declared with attribute warn_unused_result [-Wunused-result]
#define SETEUID(id) seteuid(id)
^
./nrpe.c:2286:2: note: in expansion of macro ‘SETEUID’
SETEUID(0); /* get root back so we can delete the pid file */
^
gcc -g -O2 -I/usr/include/openssl -DHAVE_CONFIG_H -I ../include -I ./../include -o check_nrpe ./check_nrpe.c ./utils.c -L/usr/lib/x86_64-linux-gnu -lssl -lcrypto -lnsl
./check_nrpe.c: In function ‘connect_to_remote’:
./check_nrpe.c:926:9: warning: format ‘%s’ expects argument of type ‘char *’, but argument 4 has type ‘int’ [-Wformat=]
rem_host, ERR_reason_error_string(x));
^
./check_nrpe.c: In function ‘alarm_handler’:
./check_nrpe.c:1457:7: warning: ignoring return value of ‘write’, declared with attribute warn_unused_result [-Wunused-result]
write(STDOUT_FILENO, msg1, sizeof(msg1) - 1);
^
./check_nrpe.c:1458:7: warning: ignoring return value of ‘write’, declared with attribute warn_unused_result [-Wunused-result]
write(STDOUT_FILENO, text, lth1);
^
./check_nrpe.c:1459:7: warning: ignoring return value of ‘write’, declared with attribute warn_unused_result [-Wunused-result]
write(STDOUT_FILENO, msg2, sizeof(msg2) - 1);
^
./check_nrpe.c:1460:7: warning: ignoring return value of ‘write’, declared with attribute warn_unused_result [-Wunused-result]
write(STDOUT_FILENO, timeout_txt, lth2);
^
./check_nrpe.c:1461:7: warning: ignoring return value of ‘write’, declared with attribute warn_unused_result [-Wunused-result]
write(STDOUT_FILENO, msg3, sizeof(msg3) - 1);

Hey Everyone, this script was very nice but it also had some weird irritations so I reworked it and added:

- Allow empty Warning/Critical values
- Added Modes so that you can check Disk IOs, Disk Queue, or Disk Wait Times

- To see the usage information use check_diskio.sh -h

Sorry I don't have this anywhere on the web so I'm just going to paste it here:



#!/bin/bash
#
# Version 0.0.2 - Jan/2009
# Changes: added device verification
#
# by Thiago Varela - thiago@iplenix.com
#
# --------------------------------------
#
# Version 0.0.3 - Dec/2011
# Changes:
# - changed values from bytes to mbytes
# - fixed bug to get traffic data without comma but point
# - current values are displayed now, not average values (first run of iostat)
#
# by Philipp Niedziela - pn@pn-it.com
#
# Version 0.0.4 - April/2014
# Changes:
# - Allow Empty warn/crit levels
# - Can check I/O, WAIT Time, or Queue
#
# by Warren Turner

iostat=`which iostat 2>/dev/null`
bc=`which bc 2>/dev/null`

function help {
echo -e "
Usage:

-d =
--Device to be checked. Example: \"-d sda\"

-i = IO Check Mode
--Checks Total Disk IO, Read IO/Sec, Write IO/Sec, Bytes Read/Sec, Bytes Written/Sec
--warning/critical = Total IO,Read IO/Sec,Write IO/Sec,Bytes Read/Sec,Bytes Written/Sec

-q = Queue Mode
--Checks Disk Queue Lengths
--warning/critial = Total Queue Length,Read Queue Length,Write Queue Length

-W = Wait Time Mode
--Check the time for I/O requests issued to the device to be served. This includes the time spent by the requests in queue and the time spent servicing them.
--warning/critical = Avg I/O Wait Time/ms,Read Wait Time/ms,Write Wait Time/ms

"
exit -1
}

# Ensuring we have the needed tools:
( [ ! -f $iostat ] || [ ! -f $bc ] ) && \
( echo "ERROR: You must have iostat and bc installed in order to run this plugin\n\tuse: apt-get install systat bc\n" && exit -1 )

io=0
queue=0
waittime=0
msg="OK"

# Getting parameters:
while getopts "d:w:c:io:qu:Wt:h" OPT; do
case $OPT in
"d") disk=$OPTARG;;
"w") warning=$OPTARG;;
"c") critical=$OPTARG;;
"i") io=1;;
"q") queue=1;;
"W") waittime=1;;
"h") help;;
esac
done

# Autofill if parameters are empty
if [ -z "$disk" ]
then disk=sda
fi

if [ -z "$warning" ]
then warning=99999
fi

if [ -z "$critical" ]
then critical=99999
fi


# Adjusting the warn and crit levels:
crit_total=`echo $critical | cut -d, -f1`
crit_read=`echo $critical | cut -d, -f2`
crit_written=`echo $critical | cut -d, -f3`
crit_kbytes_read=`echo $critical | cut -d, -f4`
crit_kbytes_written=`echo $critical | cut -d, -f5`

warn_total=`echo $warning | cut -d, -f1`
warn_read=`echo $warning | cut -d, -f2`
warn_written=`echo $warning | cut -d, -f3`
warn_kbytes_read=`echo $warning | cut -d, -f4`
warn_kbytes_written=`echo $warning | cut -d, -f5`


# # Checking parameters:
# [ ! -b "/dev/$disk" ] && echo "ERROR: Device incorrectly specified" && help

# ( [ "$warn_total" == "" ] || [ "$warn_read" == "" ] || [ "$warn_written" == "" ] || \
# [ "$crit_total" == "" ] || [ "$crit_read" == "" ] || [ "$crit_written" == "" ] ) &&
# echo "ERROR: You must specify all warning and critical levels" && help

# ( [[ "$warn_total" -ge "$crit_total" ]] || \
# [[ "$warn_read" -ge "$crit_read" ]] || \
# [[ "$warn_written" -ge "$crit_written" ]] ) && \
# echo "ERROR: critical levels must be highter than warning levels" && help


# iostat parameters:
# -m: megabytes
# -k: kilobytes
# first run of iostat shows statistics since last reboot, second one shows current vaules of hdd

# Doing the actual checks:


## IO Check ##
if [ "$io" == "1" ]
then
total=`$iostat $disk -y -k -d 2 1 | grep $disk | awk '{print $2}'`
read_sec=`$iostat $disk -x -y -k -d 2 1 | grep $disk | awk '{print $4}'`
written_sec=`$iostat $disk -x -y -k -d 2 1 | grep $disk | awk '{print $5}'`
kbytes_read_sec=`$iostat $disk -x -y -k -d 2 1 | grep $disk | awk '{print $6}'`
kbytes_written_sec=`$iostat $disk -x -y -k -d 2 1 | grep $disk | awk '{print $7}'`


# IO # "Converting" values to float (string replace , with .)
total=${total/,/.}
read_sec=${read_sec/,/.}
written_sec=${written_sec/,/.}
kbytes_read_sec=${kbytes_read_sec/,/.}
kbytes_written_sec=${kbytes_written_sec/,/.}


# IO # Comparing the result and setting the correct level:

if [ "$warn_total" -ne "99999" ]
then
if ( [ "`echo "$total >= $warn_total" | bc`" == "1" ] || [ "`echo "$read_sec >= $warn_read" | bc`" == "1" ] || \
[ "`echo "$written_sec >= $warn_written" | bc`" == "1" ] || [ "`echo "$kbytes_read_sec >= $warn_kbytes_read" | bc -q`" == "1" ] ||
[ "`echo "$kbytes_written_sec >= $warn_kybtes_written" | bc`" == "1" ] )
then
msg="WARNING"
status=1
fi
fi

if [ "$crit_total" -ne "99999" ]
then
if ( [ "`echo "$total >= $crit_total" | bc`" == "1" ] || [ "`echo "$read_sec >= $crit_read" | bc -q`" == "1" ] || \
[ "`echo "$written_sec >= $crit_written" | bc`" == "1" ] || [ "`echo "$kbytes_read_sec >= $crit_kbytes_read" | bc -q`" == "1" ] || \
[ "`echo "$kbytes_written_sec >= $crit_kbytes_written" | bc`" == "1" ] )
then
msg="CRITICAL"
status=2
fi
fi

if [ "$crit_total" == "99999" ] && [ "$warn_total" == "99999" ]
then
msg="OK"
status=0

fi

# IO # Printing the results:
echo "$msg - I/O stats: Total IO/Sec=$total Read IO/Sec=$read_sec Write IO/Sec=$written_sec KBytes Read/Sec=$kbytes_read_sec KBytes_Written/Sec=$kbytes_written_sec | 'Total IO/Sec'=$total; 'Read IO/Sec'=$read_sec; 'Write IO/Sec'=$written_sec; 'KBytes Read/Sec'=$kbytes_read_sec; 'KKBytes_Written/Sec'=$kbytes_written_sec;"

fi


## QUEUE Check ##
if [ "$queue" == "1" ]
then
total=`$iostat $disk -x -y -k -d 2 1 | grep $disk | awk '{print $8}'`
read_sec=`$iostat $disk -x -y -k -d 2 1 | grep $disk | awk '{print $2}'`
written_sec=`$iostat $disk -x -y -k -d 2 1 | grep $disk | awk '{print $3}'`


# QUEUE # "Converting" values to float (string replace , with .)
total=${total/,/.}
read_sec=${read_sec/,/.}
written_sec=${written_sec/,/.}



# QUEUE # Comparing the result and setting the correct level:

if [ "$warn_total" -ne "99999" ]
then
if ( [ "`echo "$total >= $warn_total" | bc`" == "1" ] || [ "`echo "$read_sec >= $warn_read" | bc`" == "1" ] || \
[ "`echo "$written_sec >= $warn_written" | bc`" == "1" ] )
then
msg="WARNING"
status=1
fi
fi

if [ "$crit_total" -ne "99999" ]
then
if ( [ "`echo "$total >= $crit_total" | bc`" == "1" ] || [ "`echo "$read_sec >= $crit_read" | bc -q`" == "1" ] || \
[ "`echo "$written_sec >= $crit_written" | bc`" == "1" ] )
then
msg="CRITICAL"
status=2
fi
fi

if [ "$crit_total" == "99999" ] && [ "$warn_total" == "99999" ]
then
msg="OK"
status=0

fi

# QUEUE # Printing the results:
echo "$msg - Disk Queue Stats: Average Queue Length=$total Read Queue/Sec=$read_sec Write Queue/Sec=$written_sec | 'total'=$total; 'Read Queue/Sec'=$read_sec; 'Write Queue/Sec'=$written_sec;"

fi



## WAIT TIME Check ##
if [ "$waittime" == "1" ]
then
total=`$iostat $disk -x -y -k -d 2 1 | grep $disk | awk '{print $10}'`
read_sec=`$iostat $disk -x -y -k -d 2 1 | grep $disk | awk '{print $11}'`
written_sec=`$iostat $disk -x -y -k -d 2 1 | grep $disk | awk '{print $12}'`


# QUEUE # "Converting" values to float (string replace , with .)
total=${total/,/.}
read_sec=${read_sec/,/.}
written_sec=${written_sec/,/.}


# WAIT TIME # Comparing the result and setting the correct level:

if [ "$warn_total" -ne "99999" ]
then
if ( [ "`echo "$total >= $warn_total" | bc`" == "1" ] || [ "`echo "$read_sec >= $warn_read" | bc`" == "1" ] || \
[ "`echo "$written_sec >= $warn_written" | bc`" == "1" ] )
then
msg="WARNING"
status=1
fi
fi

if [ "$crit_total" -ne "99999" ]
then
if ( [ "`echo "$total >= $crit_total" | bc`" == "1" ] || [ "`echo "$read_sec >= $crit_read" | bc -q`" == "1" ] || \
[ "`echo "$written_sec >= $crit_written" | bc`" == "1" ] )
then
msg="CRITICAL"
status=2
fi
fi

if [ "$crit_total" == "99999" ] && [ "$warn_total" == "99999" ]
then
msg="OK"
status=0

fi

# WAIT TIME # Printing the results:
echo "$msg - Wait Time Stats: Avg I/O Wait Time/ms=$total Avg Read Wait Time/ms=$read_sec Avg Write Wait Time/ms=$written_sec | 'Avg I/O Wait Time/ms'=$total; 'Avg Read Wait Time/ms'=$read_sec; 'Avg Write Wait Time/ms'=$written_sec;"

fi

exit $status