Error check messages sent to the kernel.

And make sure that if we fail to export a filesystem in mountd,
then we don't try to get a filehandle on it, or a deadlock
might occur.

3 files changed, 8 insertions, 5 deletions

diff --git a/utils/gssd/cacheio.c b/utils/gssd/cacheio.c
index 75c7a5d..f2f2960 100644
--- a/utils/gssd/cacheio.c
+++ b/utils/gssd/cacheio.c
@@ -173,11 +173,13 @@ void qword_printint(FILE *f, int num)
 	printerr(2, "%d ", num);
 }
 
-void qword_eol(FILE *f)
+int qword_eol(FILE *f)
 {
+	int err;
 	fprintf(f,"\n");
-	fflush(f);
+	err = fflush(f);
 	printerr(2, "\n");
+	return err;
 }
 
 
diff --git a/utils/gssd/cacheio.h b/utils/gssd/cacheio.h
index cc97b36..dfff258 100644
--- a/utils/gssd/cacheio.h
+++ b/utils/gssd/cacheio.h
@@ -40,7 +40,7 @@ void qword_addeol(char **bpp, int *lp);
 void qword_print(FILE *f, char *str);
 void qword_printhex(FILE *f, char *str, int slen);
 void qword_printint(FILE *f, int num);
-void qword_eol(FILE *f);
+int qword_eol(FILE *f);
 int readline(int fd, char **buf, int *lenp);
 int qword_get(char **bpp, char *dest, int bufsize);
 int qword_get_int(char **bpp, int *anint);
diff --git a/utils/gssd/svcgssd_proc.c b/utils/gssd/svcgssd_proc.c
index 7981399..4037159 100644
--- a/utils/gssd/svcgssd_proc.c
+++ b/utils/gssd/svcgssd_proc.c
@@ -72,6 +72,7 @@ do_svc_downcall(gss_buffer_desc *out_handle, struct svc_cred *cred,
 	FILE *f;
 	int i;
 	char *fname = NULL;
+	int err;
 
 	printerr(1, "doing downcall\n");
 	if ((fname = mech2file(mech)) == NULL)
@@ -93,9 +94,9 @@ do_svc_downcall(gss_buffer_desc *out_handle, struct svc_cred *cred,
 		qword_printint(f, cred->cr_groups[i]);
 	qword_print(f, fname);
 	qword_printhex(f, context_token->value, context_token->length);
-	qword_eol(f);
+	err = qword_eol(f);
 	fclose(f);
-	return 0;
+	return err;
 out_err:
 	printerr(0, "WARNING: downcall failed\n");
 	return -1;