diff mbox

Removed -Werror=unused-result warnings.

Message ID 20180305155420.104418-1-steved@redhat.com (mailing list archive)
State New, archived
Headers show

Commit Message

Steve Dickson March 5, 2018, 3:54 p.m. UTC
Signed-off-by: Steve Dickson <steved@redhat.com>
---
 support/nfs/nfs_mntent.c         | 3 ++-
 utils/blkmapd/device-discovery.c | 6 ++++--
 utils/mount/network.c            | 8 ++++++--
 utils/nfsd/nfssvc.c              | 5 +++--
 utils/statd/statd.c              | 3 ++-
 5 files changed, 17 insertions(+), 8 deletions(-)

Comments

Chuck Lever March 5, 2018, 4:06 p.m. UTC | #1
Hi Steve-

> On Mar 5, 2018, at 10:54 AM, Steve Dickson <steved@redhat.com> wrote:
> 
> Signed-off-by: Steve Dickson <steved@redhat.com>
> ---
> support/nfs/nfs_mntent.c         | 3 ++-
> utils/blkmapd/device-discovery.c | 6 ++++--
> utils/mount/network.c            | 8 ++++++--
> utils/nfsd/nfssvc.c              | 5 +++--
> utils/statd/statd.c              | 3 ++-
> 5 files changed, 17 insertions(+), 8 deletions(-)
> 
> diff --git a/support/nfs/nfs_mntent.c b/support/nfs/nfs_mntent.c
> index a2118a2..c60988a 100644
> --- a/support/nfs/nfs_mntent.c
> +++ b/support/nfs/nfs_mntent.c
> @@ -150,7 +150,8 @@ nfs_addmntent (mntFILE *mfp, struct mntent *mnt) {
> 		res = fflush(mfp->mntent_fp);
> 		if (res < 0)
> 			/* Avoid leaving a corrupt mtab file */
> -			ftruncate(fileno(mfp->mntent_fp), length);
> +			if (ftruncate(fileno(mfp->mntent_fp), length))
> +				{/* ignore return value */};

Why not

			(void)ftruncate(fileno(mfp->mntent_fp), length);

?


> 	}
> 	return (res < 0) ? 1 : 0;
> }
> diff --git a/utils/blkmapd/device-discovery.c b/utils/blkmapd/device-discovery.c
> index b71c949..1afc80f 100644
> --- a/utils/blkmapd/device-discovery.c
> +++ b/utils/blkmapd/device-discovery.c
> @@ -504,9 +504,11 @@ int main(int argc, char **argv)
> 			close(pidfd);
> 			exit(1);
> 		}
> -		ftruncate(pidfd, 0);
> +		if (ftruncate(pidfd, 0) < 0)
> +			BL_LOG_WARNING("ftruncate on %s failed: m\n", PID_FILE);
> 		sprintf(pidbuf, "%d\n", getpid());
> -		write(pidfd, pidbuf, strlen(pidbuf));
> +		if (write(pidfd, pidbuf, strlen(pidbuf)) != (ssize_t)strlen(pidbuf))
> +			BL_LOG_WARNING("write on %s failed: m\n", PID_FILE);
> 	}
> 
> 	signal(SIGINT, sig_die);
> diff --git a/utils/mount/network.c b/utils/mount/network.c
> index 8d6e4c6..9a2c878 100644
> --- a/utils/mount/network.c
> +++ b/utils/mount/network.c
> @@ -811,8 +811,12 @@ int start_statd(void)
> 			switch (pid) {
> 			case 0: /* child */
> 				setgroups(0, NULL);
> -				setgid(0);
> -				setuid(0);
> +				if (setgid(0) < 0)
> +					nfs_error(_("%s: setgid(0) failed: %s"),
> +						progname, strerror(errno));
> +				if (setuid(0) < 0)
> +					nfs_error(_("%s: setuid(0) failed: %s"),
> +						progname, strerror(errno));
> 				execle(START_STATD, START_STATD, NULL, envp);
> 				exit(1);
> 			case -1: /* error */
> diff --git a/utils/nfsd/nfssvc.c b/utils/nfsd/nfssvc.c
> index fc36792..7923f5d 100644
> --- a/utils/nfsd/nfssvc.c
> +++ b/utils/nfsd/nfssvc.c
> @@ -68,7 +68,7 @@ nfssvc_mount_nfsdfs(char *progname)
> 	 * mount nfsdfs when nfsd.ko is plugged in. So, ignore the return
> 	 * code from it and just check for the "threads" file afterward.
> 	 */
> -	system("/bin/mount -t nfsd nfsd " NFSD_FS_DIR " >/dev/null 2>&1");
> +	err = system("/bin/mount -t nfsd nfsd " NFSD_FS_DIR " >/dev/null 2>&1");
> 
> 	err = stat(NFSD_THREAD_FILE, &statbuf);
> 	if (err == 0)
> @@ -325,7 +325,8 @@ nfssvc_set_time(const char *type, const int seconds)
> 		/* set same value for lockd */
> 		fd = open("/proc/sys/fs/nfs/nlm_grace_period", O_WRONLY);
> 		if (fd >= 0) {
> -			write(fd, nbuf, strlen(nbuf));
> +			if (write(fd, nbuf, strlen(nbuf)) != (ssize_t)strlen(nbuf))
> +				xlog(L_ERROR, "Unable to write nlm_grace_period : %m");
> 			close(fd);
> 		}
> 	}
> diff --git a/utils/statd/statd.c b/utils/statd/statd.c
> index 197d853..563a272 100644
> --- a/utils/statd/statd.c
> +++ b/utils/statd/statd.c
> @@ -225,7 +225,8 @@ static void set_nlm_port(char *type, int port)
> 	fd = open(pathbuf, O_WRONLY);
> 	if (fd < 0 && errno == ENOENT) {
> 		/* probably module not loaded */
> -		system("modprobe lockd");
> +		if (system("modprobe lockd"))
> +			{/* ignore return value */};
> 		fd = open(pathbuf, O_WRONLY);
> 	}
> 	if (fd >= 0) {
> -- 
> 2.14.3
> 
> --
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--
Chuck Lever



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Steve Dickson March 5, 2018, 4:39 p.m. UTC | #2
On 03/05/2018 11:06 AM, Chuck Lever wrote:
> Hi Steve-
> 
>> On Mar 5, 2018, at 10:54 AM, Steve Dickson <steved@redhat.com> wrote:
>>
>> Signed-off-by: Steve Dickson <steved@redhat.com>
>> ---
>> support/nfs/nfs_mntent.c         | 3 ++-
>> utils/blkmapd/device-discovery.c | 6 ++++--
>> utils/mount/network.c            | 8 ++++++--
>> utils/nfsd/nfssvc.c              | 5 +++--
>> utils/statd/statd.c              | 3 ++-
>> 5 files changed, 17 insertions(+), 8 deletions(-)
>>
>> diff --git a/support/nfs/nfs_mntent.c b/support/nfs/nfs_mntent.c
>> index a2118a2..c60988a 100644
>> --- a/support/nfs/nfs_mntent.c
>> +++ b/support/nfs/nfs_mntent.c
>> @@ -150,7 +150,8 @@ nfs_addmntent (mntFILE *mfp, struct mntent *mnt) {
>> 		res = fflush(mfp->mntent_fp);
>> 		if (res < 0)
>> 			/* Avoid leaving a corrupt mtab file */
>> -			ftruncate(fileno(mfp->mntent_fp), length);
>> +			if (ftruncate(fileno(mfp->mntent_fp), length))
>> +				{/* ignore return value */};
> 
> Why not
> 
> 			(void)ftruncate(fileno(mfp->mntent_fp), length);
> 
> ?
That was the first I tried and it did not work... I still got the 
warning/error... If you have any better idea, I'm all hears! :-)

And more strangeness... I did not see these warning/errrors when I
compiled the upstream git tree on a Fedora 27 box but I do
see them when I take that tree and compile for an Fedora 28 rpm.

Thanks for cycles! 

steved.
> 
> 
>> 	}
>> 	return (res < 0) ? 1 : 0;
>> }
>> diff --git a/utils/blkmapd/device-discovery.c b/utils/blkmapd/device-discovery.c
>> index b71c949..1afc80f 100644
>> --- a/utils/blkmapd/device-discovery.c
>> +++ b/utils/blkmapd/device-discovery.c
>> @@ -504,9 +504,11 @@ int main(int argc, char **argv)
>> 			close(pidfd);
>> 			exit(1);
>> 		}
>> -		ftruncate(pidfd, 0);
>> +		if (ftruncate(pidfd, 0) < 0)
>> +			BL_LOG_WARNING("ftruncate on %s failed: m\n", PID_FILE);
>> 		sprintf(pidbuf, "%d\n", getpid());
>> -		write(pidfd, pidbuf, strlen(pidbuf));
>> +		if (write(pidfd, pidbuf, strlen(pidbuf)) != (ssize_t)strlen(pidbuf))
>> +			BL_LOG_WARNING("write on %s failed: m\n", PID_FILE);
>> 	}
>>
>> 	signal(SIGINT, sig_die);
>> diff --git a/utils/mount/network.c b/utils/mount/network.c
>> index 8d6e4c6..9a2c878 100644
>> --- a/utils/mount/network.c
>> +++ b/utils/mount/network.c
>> @@ -811,8 +811,12 @@ int start_statd(void)
>> 			switch (pid) {
>> 			case 0: /* child */
>> 				setgroups(0, NULL);
>> -				setgid(0);
>> -				setuid(0);
>> +				if (setgid(0) < 0)
>> +					nfs_error(_("%s: setgid(0) failed: %s"),
>> +						progname, strerror(errno));
>> +				if (setuid(0) < 0)
>> +					nfs_error(_("%s: setuid(0) failed: %s"),
>> +						progname, strerror(errno));
>> 				execle(START_STATD, START_STATD, NULL, envp);
>> 				exit(1);
>> 			case -1: /* error */
>> diff --git a/utils/nfsd/nfssvc.c b/utils/nfsd/nfssvc.c
>> index fc36792..7923f5d 100644
>> --- a/utils/nfsd/nfssvc.c
>> +++ b/utils/nfsd/nfssvc.c
>> @@ -68,7 +68,7 @@ nfssvc_mount_nfsdfs(char *progname)
>> 	 * mount nfsdfs when nfsd.ko is plugged in. So, ignore the return
>> 	 * code from it and just check for the "threads" file afterward.
>> 	 */
>> -	system("/bin/mount -t nfsd nfsd " NFSD_FS_DIR " >/dev/null 2>&1");
>> +	err = system("/bin/mount -t nfsd nfsd " NFSD_FS_DIR " >/dev/null 2>&1");
>>
>> 	err = stat(NFSD_THREAD_FILE, &statbuf);
>> 	if (err == 0)
>> @@ -325,7 +325,8 @@ nfssvc_set_time(const char *type, const int seconds)
>> 		/* set same value for lockd */
>> 		fd = open("/proc/sys/fs/nfs/nlm_grace_period", O_WRONLY);
>> 		if (fd >= 0) {
>> -			write(fd, nbuf, strlen(nbuf));
>> +			if (write(fd, nbuf, strlen(nbuf)) != (ssize_t)strlen(nbuf))
>> +				xlog(L_ERROR, "Unable to write nlm_grace_period : %m");
>> 			close(fd);
>> 		}
>> 	}
>> diff --git a/utils/statd/statd.c b/utils/statd/statd.c
>> index 197d853..563a272 100644
>> --- a/utils/statd/statd.c
>> +++ b/utils/statd/statd.c
>> @@ -225,7 +225,8 @@ static void set_nlm_port(char *type, int port)
>> 	fd = open(pathbuf, O_WRONLY);
>> 	if (fd < 0 && errno == ENOENT) {
>> 		/* probably module not loaded */
>> -		system("modprobe lockd");
>> +		if (system("modprobe lockd"))
>> +			{/* ignore return value */};
>> 		fd = open(pathbuf, O_WRONLY);
>> 	}
>> 	if (fd >= 0) {
>> -- 
>> 2.14.3
>>
>> --
>> To unsubscribe from this list: send the line "unsubscribe linux-nfs" in
>> the body of a message to majordomo@vger.kernel.org
>> More majordomo info at  http://vger.kernel.org/majordomo-info.html
> 
> --
> Chuck Lever
> 
> 
> 
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J. Bruce Fields March 5, 2018, 9:53 p.m. UTC | #3
On Mon, Mar 05, 2018 at 10:54:20AM -0500, Steve Dickson wrote:
> Signed-off-by: Steve Dickson <steved@redhat.com>
> ---
>  support/nfs/nfs_mntent.c         | 3 ++-
>  utils/blkmapd/device-discovery.c | 6 ++++--
>  utils/mount/network.c            | 8 ++++++--
>  utils/nfsd/nfssvc.c              | 5 +++--
>  utils/statd/statd.c              | 3 ++-
>  5 files changed, 17 insertions(+), 8 deletions(-)
> 
> diff --git a/support/nfs/nfs_mntent.c b/support/nfs/nfs_mntent.c
> index a2118a2..c60988a 100644
> --- a/support/nfs/nfs_mntent.c
> +++ b/support/nfs/nfs_mntent.c
> @@ -150,7 +150,8 @@ nfs_addmntent (mntFILE *mfp, struct mntent *mnt) {
>  		res = fflush(mfp->mntent_fp);
>  		if (res < 0)
>  			/* Avoid leaving a corrupt mtab file */
> -			ftruncate(fileno(mfp->mntent_fp), length);
> +			if (ftruncate(fileno(mfp->mntent_fp), length))
> +				{/* ignore return value */};

Might be worth a log warning?

--b.

>  	}
>  	return (res < 0) ? 1 : 0;
>  }
> diff --git a/utils/blkmapd/device-discovery.c b/utils/blkmapd/device-discovery.c
> index b71c949..1afc80f 100644
> --- a/utils/blkmapd/device-discovery.c
> +++ b/utils/blkmapd/device-discovery.c
> @@ -504,9 +504,11 @@ int main(int argc, char **argv)
>  			close(pidfd);
>  			exit(1);
>  		}
> -		ftruncate(pidfd, 0);
> +		if (ftruncate(pidfd, 0) < 0)
> +			BL_LOG_WARNING("ftruncate on %s failed: m\n", PID_FILE);
>  		sprintf(pidbuf, "%d\n", getpid());
> -		write(pidfd, pidbuf, strlen(pidbuf));
> +		if (write(pidfd, pidbuf, strlen(pidbuf)) != (ssize_t)strlen(pidbuf))
> +			BL_LOG_WARNING("write on %s failed: m\n", PID_FILE);
>  	}
>  
>  	signal(SIGINT, sig_die);
> diff --git a/utils/mount/network.c b/utils/mount/network.c
> index 8d6e4c6..9a2c878 100644
> --- a/utils/mount/network.c
> +++ b/utils/mount/network.c
> @@ -811,8 +811,12 @@ int start_statd(void)
>  			switch (pid) {
>  			case 0: /* child */
>  				setgroups(0, NULL);
> -				setgid(0);
> -				setuid(0);
> +				if (setgid(0) < 0)
> +					nfs_error(_("%s: setgid(0) failed: %s"),
> +						progname, strerror(errno));
> +				if (setuid(0) < 0)
> +					nfs_error(_("%s: setuid(0) failed: %s"),
> +						progname, strerror(errno));
>  				execle(START_STATD, START_STATD, NULL, envp);
>  				exit(1);
>  			case -1: /* error */
> diff --git a/utils/nfsd/nfssvc.c b/utils/nfsd/nfssvc.c
> index fc36792..7923f5d 100644
> --- a/utils/nfsd/nfssvc.c
> +++ b/utils/nfsd/nfssvc.c
> @@ -68,7 +68,7 @@ nfssvc_mount_nfsdfs(char *progname)
>  	 * mount nfsdfs when nfsd.ko is plugged in. So, ignore the return
>  	 * code from it and just check for the "threads" file afterward.
>  	 */
> -	system("/bin/mount -t nfsd nfsd " NFSD_FS_DIR " >/dev/null 2>&1");
> +	err = system("/bin/mount -t nfsd nfsd " NFSD_FS_DIR " >/dev/null 2>&1");
>  
>  	err = stat(NFSD_THREAD_FILE, &statbuf);
>  	if (err == 0)
> @@ -325,7 +325,8 @@ nfssvc_set_time(const char *type, const int seconds)
>  		/* set same value for lockd */
>  		fd = open("/proc/sys/fs/nfs/nlm_grace_period", O_WRONLY);
>  		if (fd >= 0) {
> -			write(fd, nbuf, strlen(nbuf));
> +			if (write(fd, nbuf, strlen(nbuf)) != (ssize_t)strlen(nbuf))
> +				xlog(L_ERROR, "Unable to write nlm_grace_period : %m");
>  			close(fd);
>  		}
>  	}
> diff --git a/utils/statd/statd.c b/utils/statd/statd.c
> index 197d853..563a272 100644
> --- a/utils/statd/statd.c
> +++ b/utils/statd/statd.c
> @@ -225,7 +225,8 @@ static void set_nlm_port(char *type, int port)
>  	fd = open(pathbuf, O_WRONLY);
>  	if (fd < 0 && errno == ENOENT) {
>  		/* probably module not loaded */
> -		system("modprobe lockd");
> +		if (system("modprobe lockd"))
> +			{/* ignore return value */};
>  		fd = open(pathbuf, O_WRONLY);
>  	}
>  	if (fd >= 0) {
> -- 
> 2.14.3
> 
> --
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Steve Dickson March 5, 2018, 10:49 p.m. UTC | #4
On 03/05/2018 04:53 PM, J. Bruce Fields wrote:
> On Mon, Mar 05, 2018 at 10:54:20AM -0500, Steve Dickson wrote:
>> Signed-off-by: Steve Dickson <steved@redhat.com>
>> ---
>>  support/nfs/nfs_mntent.c         | 3 ++-
>>  utils/blkmapd/device-discovery.c | 6 ++++--
>>  utils/mount/network.c            | 8 ++++++--
>>  utils/nfsd/nfssvc.c              | 5 +++--
>>  utils/statd/statd.c              | 3 ++-
>>  5 files changed, 17 insertions(+), 8 deletions(-)
>>
>> diff --git a/support/nfs/nfs_mntent.c b/support/nfs/nfs_mntent.c
>> index a2118a2..c60988a 100644
>> --- a/support/nfs/nfs_mntent.c
>> +++ b/support/nfs/nfs_mntent.c
>> @@ -150,7 +150,8 @@ nfs_addmntent (mntFILE *mfp, struct mntent *mnt) {
>>  		res = fflush(mfp->mntent_fp);
>>  		if (res < 0)
>>  			/* Avoid leaving a corrupt mtab file */
>> -			ftruncate(fileno(mfp->mntent_fp), length);
>> +			if (ftruncate(fileno(mfp->mntent_fp), length))
>> +				{/* ignore return value */};
> 
> Might be worth a log warning?
Yes... I thought about that. But I could not think of any meaningful
log that would help diagnose the problem... The ftruncate() is basically 
cleanly up a mess.. 

Maybe log an error message from the fflush()? 

Thanks for the review!

steved.
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J. Bruce Fields March 6, 2018, 3:33 p.m. UTC | #5
On Mon, Mar 05, 2018 at 05:49:26PM -0500, Steve Dickson wrote:
> 
> 
> On 03/05/2018 04:53 PM, J. Bruce Fields wrote:
> > On Mon, Mar 05, 2018 at 10:54:20AM -0500, Steve Dickson wrote:
> >> Signed-off-by: Steve Dickson <steved@redhat.com>
> >> ---
> >>  support/nfs/nfs_mntent.c         | 3 ++-
> >>  utils/blkmapd/device-discovery.c | 6 ++++--
> >>  utils/mount/network.c            | 8 ++++++--
> >>  utils/nfsd/nfssvc.c              | 5 +++--
> >>  utils/statd/statd.c              | 3 ++-
> >>  5 files changed, 17 insertions(+), 8 deletions(-)
> >>
> >> diff --git a/support/nfs/nfs_mntent.c b/support/nfs/nfs_mntent.c
> >> index a2118a2..c60988a 100644
> >> --- a/support/nfs/nfs_mntent.c
> >> +++ b/support/nfs/nfs_mntent.c
> >> @@ -150,7 +150,8 @@ nfs_addmntent (mntFILE *mfp, struct mntent *mnt) {
> >>  		res = fflush(mfp->mntent_fp);
> >>  		if (res < 0)
> >>  			/* Avoid leaving a corrupt mtab file */
> >> -			ftruncate(fileno(mfp->mntent_fp), length);
> >> +			if (ftruncate(fileno(mfp->mntent_fp), length))
> >> +				{/* ignore return value */};
> > 
> > Might be worth a log warning?
> Yes... I thought about that. But I could not think of any meaningful
> log that would help diagnose the problem... The ftruncate() is basically 
> cleanly up a mess.. 
> 
> Maybe log an error message from the fflush()? 

Yeah, and I admit maybe it's not worth anything specifically by the time
the ftruncate also fails.

--b.
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Chuck Lever March 6, 2018, 3:35 p.m. UTC | #6
> On Mar 6, 2018, at 10:33 AM, J. Bruce Fields <bfields@fieldses.org> wrote:
> 
> On Mon, Mar 05, 2018 at 05:49:26PM -0500, Steve Dickson wrote:
>> 
>> 
>> On 03/05/2018 04:53 PM, J. Bruce Fields wrote:
>>> On Mon, Mar 05, 2018 at 10:54:20AM -0500, Steve Dickson wrote:
>>>> Signed-off-by: Steve Dickson <steved@redhat.com>
>>>> ---
>>>> support/nfs/nfs_mntent.c         | 3 ++-
>>>> utils/blkmapd/device-discovery.c | 6 ++++--
>>>> utils/mount/network.c            | 8 ++++++--
>>>> utils/nfsd/nfssvc.c              | 5 +++--
>>>> utils/statd/statd.c              | 3 ++-
>>>> 5 files changed, 17 insertions(+), 8 deletions(-)
>>>> 
>>>> diff --git a/support/nfs/nfs_mntent.c b/support/nfs/nfs_mntent.c
>>>> index a2118a2..c60988a 100644
>>>> --- a/support/nfs/nfs_mntent.c
>>>> +++ b/support/nfs/nfs_mntent.c
>>>> @@ -150,7 +150,8 @@ nfs_addmntent (mntFILE *mfp, struct mntent *mnt) {
>>>> 		res = fflush(mfp->mntent_fp);
>>>> 		if (res < 0)
>>>> 			/* Avoid leaving a corrupt mtab file */
>>>> -			ftruncate(fileno(mfp->mntent_fp), length);
>>>> +			if (ftruncate(fileno(mfp->mntent_fp), length))
>>>> +				{/* ignore return value */};
>>> 
>>> Might be worth a log warning?
>> Yes... I thought about that. But I could not think of any meaningful
>> log that would help diagnose the problem... The ftruncate() is basically 
>> cleanly up a mess.. 
>> 
>> Maybe log an error message from the fflush()? 
> 
> Yeah, and I admit maybe it's not worth anything specifically by the time
> the ftruncate also fails.

Acknowledging that fact in the comment might be a good idea.

--
Chuck Lever



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diff mbox

Patch

diff --git a/support/nfs/nfs_mntent.c b/support/nfs/nfs_mntent.c
index a2118a2..c60988a 100644
--- a/support/nfs/nfs_mntent.c
+++ b/support/nfs/nfs_mntent.c
@@ -150,7 +150,8 @@  nfs_addmntent (mntFILE *mfp, struct mntent *mnt) {
 		res = fflush(mfp->mntent_fp);
 		if (res < 0)
 			/* Avoid leaving a corrupt mtab file */
-			ftruncate(fileno(mfp->mntent_fp), length);
+			if (ftruncate(fileno(mfp->mntent_fp), length))
+				{/* ignore return value */};
 	}
 	return (res < 0) ? 1 : 0;
 }
diff --git a/utils/blkmapd/device-discovery.c b/utils/blkmapd/device-discovery.c
index b71c949..1afc80f 100644
--- a/utils/blkmapd/device-discovery.c
+++ b/utils/blkmapd/device-discovery.c
@@ -504,9 +504,11 @@  int main(int argc, char **argv)
 			close(pidfd);
 			exit(1);
 		}
-		ftruncate(pidfd, 0);
+		if (ftruncate(pidfd, 0) < 0)
+			BL_LOG_WARNING("ftruncate on %s failed: m\n", PID_FILE);
 		sprintf(pidbuf, "%d\n", getpid());
-		write(pidfd, pidbuf, strlen(pidbuf));
+		if (write(pidfd, pidbuf, strlen(pidbuf)) != (ssize_t)strlen(pidbuf))
+			BL_LOG_WARNING("write on %s failed: m\n", PID_FILE);
 	}
 
 	signal(SIGINT, sig_die);
diff --git a/utils/mount/network.c b/utils/mount/network.c
index 8d6e4c6..9a2c878 100644
--- a/utils/mount/network.c
+++ b/utils/mount/network.c
@@ -811,8 +811,12 @@  int start_statd(void)
 			switch (pid) {
 			case 0: /* child */
 				setgroups(0, NULL);
-				setgid(0);
-				setuid(0);
+				if (setgid(0) < 0)
+					nfs_error(_("%s: setgid(0) failed: %s"),
+						progname, strerror(errno));
+				if (setuid(0) < 0)
+					nfs_error(_("%s: setuid(0) failed: %s"),
+						progname, strerror(errno));
 				execle(START_STATD, START_STATD, NULL, envp);
 				exit(1);
 			case -1: /* error */
diff --git a/utils/nfsd/nfssvc.c b/utils/nfsd/nfssvc.c
index fc36792..7923f5d 100644
--- a/utils/nfsd/nfssvc.c
+++ b/utils/nfsd/nfssvc.c
@@ -68,7 +68,7 @@  nfssvc_mount_nfsdfs(char *progname)
 	 * mount nfsdfs when nfsd.ko is plugged in. So, ignore the return
 	 * code from it and just check for the "threads" file afterward.
 	 */
-	system("/bin/mount -t nfsd nfsd " NFSD_FS_DIR " >/dev/null 2>&1");
+	err = system("/bin/mount -t nfsd nfsd " NFSD_FS_DIR " >/dev/null 2>&1");
 
 	err = stat(NFSD_THREAD_FILE, &statbuf);
 	if (err == 0)
@@ -325,7 +325,8 @@  nfssvc_set_time(const char *type, const int seconds)
 		/* set same value for lockd */
 		fd = open("/proc/sys/fs/nfs/nlm_grace_period", O_WRONLY);
 		if (fd >= 0) {
-			write(fd, nbuf, strlen(nbuf));
+			if (write(fd, nbuf, strlen(nbuf)) != (ssize_t)strlen(nbuf))
+				xlog(L_ERROR, "Unable to write nlm_grace_period : %m");
 			close(fd);
 		}
 	}
diff --git a/utils/statd/statd.c b/utils/statd/statd.c
index 197d853..563a272 100644
--- a/utils/statd/statd.c
+++ b/utils/statd/statd.c
@@ -225,7 +225,8 @@  static void set_nlm_port(char *type, int port)
 	fd = open(pathbuf, O_WRONLY);
 	if (fd < 0 && errno == ENOENT) {
 		/* probably module not loaded */
-		system("modprobe lockd");
+		if (system("modprobe lockd"))
+			{/* ignore return value */};
 		fd = open(pathbuf, O_WRONLY);
 	}
 	if (fd >= 0) {