ipptest: Remove strerror()tizen_4.0.m1_releasesubmit/tizen/20170418.065107accepted/tizen/unified/20170419.054145

To remove warning of static analysis tool, this removes strerror().

Change-Id: I132cf0271ac9a1641c1c88611aca5c3f311240a7
Signed-off-by: Hoegeun Kwon <hoegeun.kwon@samsung.com>

8 files changed, 81 insertions, 98 deletions

diff --git a/tests/ipptest/fimc.c b/tests/ipptest/fimc.c
index c18986d9..037b5202 100644
--- a/tests/ipptest/fimc.c
+++ b/tests/ipptest/fimc.c
@@ -108,8 +108,7 @@ struct resources *get_resources(struct device *dev)
 
 	res->res = drmModeGetResources(dev->fd);
 	if (!res->res) {
-		fprintf(stderr, "drmModeGetResources failed: %s\n",
-			strerror(errno));
+		fprintf(stderr, "drmModeGetResources failed: %d\n", errno);
 		goto error;
 	}
 
@@ -133,9 +132,9 @@ struct resources *get_resources(struct device *dev)
 			(_res)->type##s[i].type =				\
 				drmModeGet##Type(dev->fd, (_res)->__res->type##s[i]); \
 			if (!(_res)->type##s[i].type)				\
-				fprintf(stderr, "could not get %s %i: %s\n",	\
+				fprintf(stderr, "could not get %s %i: %d\n",	\
 					#type, (_res)->__res->type##s[i],	\
-					strerror(errno));			\
+					errno);					\
 		}								\
 	} while (0)
 
@@ -155,9 +154,9 @@ struct resources *get_resources(struct device *dev)
 							   DRM_MODE_OBJECT_##Type); \
 			if (!obj->props) {					\
 				fprintf(stderr,					\
-					"could not get %s %i properties: %s\n", \
+					"could not get %s %i properties: %d\n", \
 					#type, obj->type->type##_id,		\
-					strerror(errno));			\
+					errno);					\
 				continue;					\
 			}							\
 			obj->props_info = malloc(obj->props->count_props *	\
@@ -185,9 +184,9 @@ struct resources *get_resources(struct device *dev)
 				DRM_MODE_OBJECT_CONNECTOR);
 
 		if (!obj->props) {
-			fprintf(stderr, "could not get %s %u properties: %s\n",
+			fprintf(stderr, "could not get %s %u properties: %d\n",
 				"drm_connector", obj->connector->connector_id,
-				strerror(errno));
+				errno);
 			continue;
 		}
 
@@ -208,8 +207,7 @@ struct resources *get_resources(struct device *dev)
 
 	res->plane_res = drmModeGetPlaneResources(dev->fd);
 	if (!res->plane_res) {
-		fprintf(stderr, "drmModeGetPlaneResources failed: %s\n",
-			strerror(errno));
+		fprintf(stderr, "drmModeGetPlaneResources failed: %d\n", errno);
 		return res;
 	}
 
@@ -507,8 +505,8 @@ static int exynos_drm_ipp_set_property(int fd,
 	ret = ioctl(fd, DRM_IOCTL_EXYNOS_IPP_SET_PROPERTY, property);
 	if (ret)
 		fprintf(stderr,
-			"failed to DRM_IOCTL_EXYNOS_IPP_SET_PROPERTY : %s\n",
-			strerror(errno));
+			"failed to DRM_IOCTL_EXYNOS_IPP_SET_PROPERTY : %d\n",
+			errno);
 	
 	printf("DRM_IOCTL_EXYNOS_IPP_SET_PROPERTY : prop_id[%d]\n",
 		property->prop_id);
@@ -541,8 +539,8 @@ static int exynos_drm_ipp_queue_buf(int fd, struct drm_exynos_ipp_queue_buf *qbu
 	ret = ioctl(fd, DRM_IOCTL_EXYNOS_IPP_QUEUE_BUF, qbuf);
 	if (ret)
 		fprintf(stderr,
-		"failed to DRM_IOCTL_EXYNOS_IPP_QUEUE_BUF[id:%d][buf_type:%d] : %s\n",
-		ops_id, buf_type, strerror(errno));
+		"failed to DRM_IOCTL_EXYNOS_IPP_QUEUE_BUF[id:%d][buf_type:%d] : %d\n",
+		ops_id, buf_type, errno);
 
 	return ret;
 }
@@ -561,8 +559,8 @@ static int exynos_drm_ipp_cmd_ctrl(int fd, struct drm_exynos_ipp_cmd_ctrl *cmd_c
 	ret = ioctl(fd, DRM_IOCTL_EXYNOS_IPP_CMD_CTRL, cmd_ctrl);
 	if (ret)
 		fprintf(stderr,
-		"failed to DRM_IOCTL_EXYNOS_IPP_CMD_CTRL[prop_id:%d][ctrl:%d] : %s\n",
-		prop_id, ctrl, strerror(errno));
+		"failed to DRM_IOCTL_EXYNOS_IPP_CMD_CTRL[prop_id:%d][ctrl:%d] : %d\n",
+		prop_id, ctrl, errno);
 
 	return ret;
 }
@@ -833,9 +831,9 @@ void fimc_m2m_set_mode(struct device *dev, struct connector *c, int count,
 				pipe.fourcc, handles, pitches,
 				offsets, &fb_id_dst, 0);
 		if (ret) {
-			fprintf(stderr, "failed to add fb (%ux%u):%s\n",
+			fprintf(stderr, "failed to add fb (%ux%u):%d\n",
 					dev->mode.width, dev->mode.height,
-					strerror(errno));
+					errno);
 			goto err_ipp_quque_close;
 		}
 
@@ -844,8 +842,7 @@ void fimc_m2m_set_mode(struct device *dev, struct connector *c, int count,
 					fb_id_dst, 0, 0, pipe.con_ids,
 					pipe.num_cons, pipe.mode);
 		if (ret) {
-			fprintf(stderr, "failed to set crtc: %s\n",
-							strerror(errno));
+			fprintf(stderr, "failed to set crtc: %d\n", errno);
 			goto err_ipp_quque_close;
 		}
 
@@ -870,8 +867,8 @@ void fimc_m2m_set_mode(struct device *dev, struct connector *c, int count,
 					fb_id_dst, DRM_MODE_PAGE_FLIP_EVENT,
 					&pipe);
 			if (ret) {
-				fprintf(stderr, "failed to page flip: %s\n",
-						strerror(errno));
+				fprintf(stderr, "failed to page flip: %d\n",
+					errno);
 				goto err_ipp_quque_close;
 			}
 
@@ -999,8 +996,8 @@ void fimc_wb_set_mode(struct connector *c, int count, int page_flip,
 	for (i = 0; i < MAX_BUF; i++) {
 		ret = util_gem_create_mmap(fd, &gem[i], &mmap[i], stride * height);
 		if (ret) {
-			fprintf(stderr, "failed to gem create mmap: %s\n",
-								strerror(errno));
+			fprintf(stderr, "failed to gem create mmap: %d\n",
+				errno);
 			if (ret == -1) return;
 			else if (ret == -2) goto err_ipp_ctrl_close;
 		}
diff --git a/tests/ipptest/fimctest.c b/tests/ipptest/fimctest.c
index 196f3c4b..09c8b676 100644
--- a/tests/ipptest/fimctest.c
+++ b/tests/ipptest/fimctest.c
@@ -123,8 +123,8 @@ static void dump_encoders(void)
 		encoder = drmModeGetEncoder(fd, resources->encoders[i]);
 
 		if (!encoder) {
-			fprintf(stderr, "could not get encoder %i: %s\n",
-				resources->encoders[i], strerror(errno));
+			fprintf(stderr, "could not get encoder %i: %d\n",
+				resources->encoders[i], errno);
 			continue;
 		}
 		printf("%d\t%d\t%s\t0x%08x\t0x%08x\n",
@@ -179,8 +179,8 @@ static void dump_connectors(void)
 		connector = drmModeGetConnector(fd, resources->connectors[i]);
 
 		if (!connector) {
-			fprintf(stderr, "could not get connector %i: %s\n",
-				resources->connectors[i], strerror(errno));
+			fprintf(stderr, "could not get connector %i: %d\n",
+				resources->connectors[i], errno);
 			continue;
 		}
 
@@ -225,8 +225,8 @@ static void dump_crtcs(void)
 		crtc = drmModeGetCrtc(fd, resources->crtcs[i]);
 
 		if (!crtc) {
-			fprintf(stderr, "could not get crtc %i: %s\n",
-				resources->crtcs[i], strerror(errno));
+			fprintf(stderr, "could not get crtc %i: %d\n",
+				resources->crtcs[i], errno);
 			continue;
 		}
 		printf("%d\t%d\t(%d,%d)\t(%dx%d)\n",
@@ -252,8 +252,8 @@ static void dump_framebuffers(void)
 		fb = drmModeGetFB(fd, resources->fbs[i]);
 
 		if (!fb) {
-			fprintf(stderr, "could not get fb %i: %s\n",
-				resources->fbs[i], strerror(errno));
+			fprintf(stderr, "could not get fb %i: %d\n",
+				resources->fbs[i], errno);
 			continue;
 		}
 		printf("%u\t(%ux%u)\t%u\n",
@@ -288,8 +288,8 @@ void connector_find_mode(struct connector *c)
 		connector = drmModeGetConnector(fd, resources->connectors[i]);
 
 		if (!connector) {
-			fprintf(stderr, "could not get connector %i: %s\n",
-				resources->connectors[i], strerror(errno));
+			fprintf(stderr, "could not get connector %i: %d\n",
+				resources->connectors[i], errno);
 			continue;
 		}
 
@@ -337,8 +337,8 @@ void connector_find_mode(struct connector *c)
 		encoder = drmModeGetEncoder(fd, resources->encoders[i]);
 
 		if (!encoder) {
-			fprintf(stderr, "could not get encoder %i: %s\n",
-				resources->encoders[i], strerror(errno));
+			fprintf(stderr, "could not get encoder %i: %d\n",
+				resources->encoders[i], errno);
 			continue;
 		}
 
@@ -456,8 +456,7 @@ int main(int argc, char **argv)
 
 	dev.resources = get_resources(&dev);
 	if (!dev.resources) {
-		fprintf(stderr, "get_resources failed: %s\n",
-							strerror(errno));
+		fprintf(stderr, "get_resources failed: %d\n", errno);
 		drmClose(dev.fd);
 		return 1;
 	}
@@ -483,8 +482,8 @@ int main(int argc, char **argv)
 			ret = kms_create(dev.fd, &dev.kms);
 			if (ret) {
 				fprintf(stderr,
-					"failed to create kms driver: %s\n",
-					strerror(-ret));
+					"failed to create kms driver: %d\n",
+					ret);
 				break;
 			}
 
diff --git a/tests/ipptest/gem.c b/tests/ipptest/gem.c
index a60bc250..ea7426c1 100644
--- a/tests/ipptest/gem.c
+++ b/tests/ipptest/gem.c
@@ -54,8 +54,8 @@ int exynos_gem_create(int fd, struct drm_exynos_gem_create *gem)
 	}
 	ret = ioctl(fd, DRM_IOCTL_EXYNOS_GEM_CREATE, gem);
 	if (ret < 0)
-		fprintf(stderr, "failed to create gem buffer: %s\n",
-								strerror(-ret));
+		fprintf(stderr, "failed to create gem buffer: %d\n", ret);
+
 	return ret;
 }
 
@@ -70,8 +70,7 @@ int exynos_gem_mmap(int fd, struct exynos_gem_mmap_data *in_mmap)
 
 	ret = ioctl(fd, DRM_IOCTL_EXYNOS_GEM_MAP, &arg);
 	if (ret) {
-		fprintf(stderr, "failed to map dumb buffer: %s\n",
-				strerror(errno));
+		fprintf(stderr, "failed to map dumb buffer: %d\n", errno);
 		return ret;
 	}
 
@@ -80,8 +79,7 @@ int exynos_gem_mmap(int fd, struct exynos_gem_mmap_data *in_mmap)
 	map = mmap(NULL, (size_t)in_mmap->size, PROT_READ | PROT_WRITE,
 			MAP_SHARED, fd, (off_t)arg.offset);
 	if (map == MAP_FAILED) {
-		fprintf(stderr, "failed to mmap buffer: %s\n",
-				strerror(errno));
+		fprintf(stderr, "failed to mmap buffer: %d\n", errno);
 		return -EFAULT;
 	}
 
@@ -96,7 +94,7 @@ int exynos_gem_close(int fd, struct drm_gem_close *gem_close)
 
 	ret = ioctl(fd, DRM_IOCTL_GEM_CLOSE, gem_close);
 	if (ret < 0)
-		fprintf(stderr, "failed to close: %s\n", strerror(-ret));
+		fprintf(stderr, "failed to close: %d\n", ret);
 	return ret;
 }
 
@@ -117,15 +115,13 @@ struct kms_bo* exynos_kms_gem_create(struct kms_driver *kms,
 
 	ret = kms_bo_create(kms, bo_attribs, &bo);
 	if (ret) {
-		fprintf(stderr, "failed to alloc buffer: %s\n",
-			strerror(-ret));
+		fprintf(stderr, "failed to alloc buffer: %d\n", ret);
 		return NULL;
 	}
 
 	ret = kms_bo_get_prop(bo, KMS_PITCH, stride);
 	if (ret) {
-		fprintf(stderr, "failed to retreive buffer stride: %s\n",
-			strerror(-ret));
+		fprintf(stderr, "failed to retreive buffer stride: %d\n", ret);
 		kms_bo_destroy(&bo);
 		return NULL;
 	}
diff --git a/tests/ipptest/util.c b/tests/ipptest/util.c
index bf06b3c1..c8efe3d3 100644
--- a/tests/ipptest/util.c
+++ b/tests/ipptest/util.c
@@ -159,7 +159,7 @@ int util_gem_create_mmap(int fd, struct drm_exynos_gem_create *gem,
 	gem->size = size;
 
 	if (exynos_gem_create(fd, gem) < 0) {
-		fprintf(stderr, "failed to gem create: %s\n", strerror(errno));
+		fprintf(stderr, "failed to gem create: %d\n", errno);
 		return -1;
 	}
 
@@ -169,7 +169,7 @@ int util_gem_create_mmap(int fd, struct drm_exynos_gem_create *gem,
 	mmap->size = gem->size;
 
 	if (exynos_gem_mmap(fd, mmap) < 0) {
-		fprintf(stderr, "failed to gem mmap: %s\n", strerror(errno));
+		fprintf(stderr, "failed to gem mmap: %d\n", errno);
 		return -2;
 	}
 
@@ -208,8 +208,7 @@ struct kms_bo *util_kms_gem_create_mmap(struct kms_driver *kms,
 
 	ret = kms_bo_map(bo, &virtual);
 	if (ret) {
-		fprintf(stderr, "failed to map buffer: %s\n",
-			strerror(-ret));
+		fprintf(stderr, "failed to map buffer: %d\n", ret);
 		kms_bo_destroy(&bo);
 		return NULL;
 	}
@@ -307,7 +306,7 @@ int util_kms_gem_destroy_mmap(struct kms_bo **bo)
 
 	ret = kms_bo_destroy(bo);
 	if (ret < 0)
-		fprintf(stderr, "failed kms bo destroy: %s\n", strerror(errno));
+		fprintf(stderr, "failed kms bo destroy: %d\n", errno);
 
 	return ret;
 }
diff --git a/tests/rottest/gem.c b/tests/rottest/gem.c
index 69c5a8cf..9a871f63 100644
--- a/tests/rottest/gem.c
+++ b/tests/rottest/gem.c
@@ -53,8 +53,7 @@ int exynos_gem_create(int fd, struct drm_exynos_gem_create *gem)
 	}
 	ret = ioctl(fd, DRM_IOCTL_EXYNOS_GEM_CREATE, gem);
 	if (ret < 0)
-		fprintf(stderr, "failed to create gem buffer: %s\n",
-								strerror(-ret));
+		fprintf(stderr, "failed to create gem buffer: %d\n", ret);
 	return ret;
 }
 
@@ -69,8 +68,7 @@ int exynos_gem_mmap(int fd, struct exynos_gem_mmap_data *in_mmap)
 
 	ret = ioctl(fd, DRM_IOCTL_EXYNOS_GEM_MAP, &arg);
 	if (ret) {
-		fprintf(stderr, "failed to map dumb buffer: %s\n",
-				strerror(errno));
+		fprintf(stderr, "failed to map dumb buffer: %d\n", errno);
 		return ret;
 	}
 
@@ -79,8 +77,7 @@ int exynos_gem_mmap(int fd, struct exynos_gem_mmap_data *in_mmap)
 	map = mmap(NULL, (size_t)in_mmap->size, PROT_READ | PROT_WRITE,
 			MAP_SHARED, fd, (off_t)arg.offset);
 	if (map == MAP_FAILED) {
-		fprintf(stderr, "failed to mmap buffer: %s\n",
-				strerror(errno));
+		fprintf(stderr, "failed to mmap buffer: %d\n", errno);
 		return -EFAULT;
 	}
 
@@ -95,6 +92,6 @@ int exynos_gem_close(int fd, struct drm_gem_close *gem_close)
 
 	ret = ioctl(fd, DRM_IOCTL_GEM_CLOSE, gem_close);
 	if (ret < 0)
-		fprintf(stderr, "failed to close: %s\n", strerror(-ret));
+		fprintf(stderr, "failed to close: %d\n", ret);
 	return ret;
 }
diff --git a/tests/rottest/rotator.c b/tests/rottest/rotator.c
index 10972cac..06002ada 100644
--- a/tests/rottest/rotator.c
+++ b/tests/rottest/rotator.c
@@ -73,8 +73,8 @@ static int exynos_drm_ipp_set_property(int fd,
 	ret = ioctl(fd, DRM_IOCTL_EXYNOS_IPP_SET_PROPERTY, property);
 	if (ret)
 		fprintf(stderr,
-			"failed to DRM_IOCTL_EXYNOS_IPP_SET_PROPERTY : %s\n",
-			strerror(errno));
+			"failed to DRM_IOCTL_EXYNOS_IPP_SET_PROPERTY : %d\n",
+			errno);
 
 	return ret;
 }
@@ -103,8 +103,8 @@ static int exynos_drm_ipp_queue_buf(int fd, int prop_id,
 	if (ret)
 		fprintf(stderr,
 			"failed to DRM_IOCTL_EXYNOS_IPP_QUEUE_BUF[prop_id:%d]"\
-			"[ops_id:%d][buf_id:%d][buf_type:%d] : %s\n",
-			prop_id, ops_id, buf_id, buf_type, strerror(errno));
+			"[ops_id:%d][buf_id:%d][buf_type:%d] : %d\n",
+			prop_id, ops_id, buf_id, buf_type, errno);
  
 	return ret;
 }
@@ -124,7 +124,7 @@ static int exynos_drm_ipp_cmd_ctrl(int fd, int prop_id,
 	if (ret)
 		fprintf(stderr,
 			"failed to DRM_IOCTL_EXYNOS_IPP_CMD_CTRL[prop_id:%d]"\
-			"[ctrl:%d] : %s\n", prop_id, ctrl, strerror(errno));
+			"[ctrl:%d] : %d\n", prop_id, ctrl, errno);
 
 	return ret;
 }
@@ -163,8 +163,7 @@ static int rotator_set_mode_property(struct connector *c, int count,
 	ret = exynos_drm_ipp_set_property(fd, property, &src_pos, &src_sz,
 							&dst_pos, &dst_sz);
 	if (ret)
-		fprintf(stderr, "failed to ipp set property: %s\n",
-							strerror(errno));
+		fprintf(stderr, "failed to ipp set property: %d\n", errno);
 
 	return ret;
 }
@@ -249,8 +248,7 @@ void rotator_1_N_set_mode(struct connector *c, int count, int page_flip,
 	ret = rotator_set_mode_property(c, count, &width, &height, &stride,
 								&property);
 	if (ret) {
-		fprintf(stderr, "failed to set mode property : %s\n",
-							strerror(errno));
+		fprintf(stderr, "failed to set mode property : %d\n", errno);
 		return;
 	}
 
@@ -258,8 +256,7 @@ void rotator_1_N_set_mode(struct connector *c, int count, int page_flip,
 	/* For source buffer */
 	ret = util_gem_create_mmap(fd, &gem1, &mmap1, stride * height);
 	if (ret) {
-		fprintf(stderr, "failed to gem create mmap: %s\n",
-							strerror(errno));
+		fprintf(stderr, "failed to gem create mmap: %d\n", errno);
 		return;
 	}
 	usr_addr1 = mmap1.addr;
@@ -272,8 +269,8 @@ void rotator_1_N_set_mode(struct connector *c, int count, int page_flip,
 		ret = util_gem_create_mmap(fd, &gem2[i], &mmap2[i],
 						stride * height);
 		if (ret) {
-			fprintf(stderr, "failed to gem create mmap: %d : %s\n",
-							i, strerror(errno));
+			fprintf(stderr, "failed to gem create mmap: %d : %d\n",
+				i, errno);
 			goto err_gem_create_mmap;
 		}
 		usr_addr2[i] = mmap2[i].addr;
@@ -439,8 +436,7 @@ void rotator_N_N_set_mode(struct connector *c, int count, int page_flip,
 	ret = rotator_set_mode_property(c, count, &width, &height, &stride,
 								&property);
 	if (ret) {
-		fprintf(stderr, "failed to set mode property : %s\n",
-							strerror(errno));
+		fprintf(stderr, "failed to set mode property : %d\n", errno);
 		return;
 	}
 
@@ -450,8 +446,8 @@ void rotator_N_N_set_mode(struct connector *c, int count, int page_flip,
 		ret = util_gem_create_mmap(fd, &gem1[i], &mmap1[i],
 						stride * height);
 		if (ret) {
-			fprintf(stderr, "failed to gem create mmap: %d : %s\n",
-							i, strerror(errno));
+			fprintf(stderr, "failed to gem create mmap: %d : %d\n",
+				i, errno);
 			goto err_gem_create_mmap;
 		}
 		usr_addr1[i] = mmap1[i].addr;
@@ -463,8 +459,8 @@ void rotator_N_N_set_mode(struct connector *c, int count, int page_flip,
 		ret = util_gem_create_mmap(fd, &gem2[i], &mmap2[i],
 						stride * height);
 		if (ret) {
-			fprintf(stderr, "failed to gem create mmap: %d : %s\n",
-							i, strerror(errno));
+			fprintf(stderr, "failed to gem create mmap: %d : %d\n",
+				i, errno);
 			goto err_gem_create_mmap;
 		}
 		usr_addr2[i] = mmap2[i].addr;
diff --git a/tests/rottest/rottest.c b/tests/rottest/rottest.c
index a035e2e0..5546a6de 100644
--- a/tests/rottest/rottest.c
+++ b/tests/rottest/rottest.c
@@ -123,8 +123,8 @@ static void dump_encoders(void)
 		encoder = drmModeGetEncoder(fd, resources->encoders[i]);
 
 		if (!encoder) {
-			fprintf(stderr, "could not get encoder %i: %s\n",
-				resources->encoders[i], strerror(errno));
+			fprintf(stderr, "could not get encoder %i: %d\n",
+				resources->encoders[i], errno);
 			continue;
 		}
 		printf("%d\t%d\t%s\t0x%08x\t0x%08x\n",
@@ -179,8 +179,8 @@ static void dump_connectors(void)
 		connector = drmModeGetConnector(fd, resources->connectors[i]);
 
 		if (!connector) {
-			fprintf(stderr, "could not get connector %i: %s\n",
-				resources->connectors[i], strerror(errno));
+			fprintf(stderr, "could not get connector %i: %d\n",
+				resources->connectors[i], errno);
 			continue;
 		}
 
@@ -227,8 +227,8 @@ static void dump_crtcs(void)
 		crtc = drmModeGetCrtc(fd, resources->crtcs[i]);
 
 		if (!crtc) {
-			fprintf(stderr, "could not get crtc %i: %s\n",
-				resources->crtcs[i], strerror(errno));
+			fprintf(stderr, "could not get crtc %i: %d\n",
+				resources->crtcs[i], errno);
 			continue;
 		}
 		printf("%d\t%d\t(%d,%d)\t(%dx%d)\n",
@@ -254,8 +254,8 @@ static void dump_framebuffers(void)
 		fb = drmModeGetFB(fd, resources->fbs[i]);
 
 		if (!fb) {
-			fprintf(stderr, "could not get fb %i: %s\n",
-				resources->fbs[i], strerror(errno));
+			fprintf(stderr, "could not get fb %i: %d\n",
+				resources->fbs[i], errno);
 			continue;
 		}
 		printf("%u\t(%ux%u)\t%u\n",
@@ -290,8 +290,8 @@ void connector_find_mode(struct connector *c)
 		connector = drmModeGetConnector(fd, resources->connectors[i]);
 
 		if (!connector) {
-			fprintf(stderr, "could not get connector %i: %s\n",
-				resources->connectors[i], strerror(errno));
+			fprintf(stderr, "could not get connector %i: %d\n",
+				resources->connectors[i], errno);
 			continue;
 		}
 
@@ -339,8 +339,8 @@ void connector_find_mode(struct connector *c)
 		encoder = drmModeGetEncoder(fd, resources->encoders[i]);
 
 		if (!encoder) {
-			fprintf(stderr, "could not get encoder %i: %s\n",
-				resources->encoders[i], strerror(errno));
+			fprintf(stderr, "could not get encoder %i: %d\n",
+				resources->encoders[i], errno);
 			continue;
 		}
 
@@ -440,8 +440,7 @@ int main(int argc, char **argv)
 
 	resources = drmModeGetResources(fd);
 	if (!resources) {
-		fprintf(stderr, "drmModeGetResources failed: %s\n",
-							strerror(errno));
+		fprintf(stderr, "drmModeGetResources failed: %d\n", errno);
 		drmClose(fd);
 		return 1;
 	}
diff --git a/tests/rottest/util.c b/tests/rottest/util.c
index 3456278a..8aa793dd 100644
--- a/tests/rottest/util.c
+++ b/tests/rottest/util.c
@@ -47,7 +47,7 @@ int util_gem_create_mmap(int fd, struct drm_exynos_gem_create *gem,
 	gem->size = size;
 
 	if (exynos_gem_create(fd, gem) < 0) {
-		fprintf(stderr, "failed to gem create: %s\n", strerror(errno));
+		fprintf(stderr, "failed to gem create: %d\n", errno);
 		return -1;
 	}
 
@@ -57,7 +57,7 @@ int util_gem_create_mmap(int fd, struct drm_exynos_gem_create *gem,
 	mmap->size = gem->size;
 
 	if (exynos_gem_mmap(fd, mmap) < 0) {
-		fprintf(stderr, "failed to gem mmap: %s\n", strerror(errno));
+		fprintf(stderr, "failed to gem mmap: %d\n", errno);
 		memset(&args, 0x00, sizeof(struct drm_gem_close));
 		args.handle = gem->handle;
 		exynos_gem_close(fd, &args);