Patchwork ubi-utils updates for gcc-4.3.x

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Submitter Tom Rini
Date Dec. 8, 2008, 8:02 a.m.
Message ID <20081208080138.GJ15204@smtp.west.cox.net>
Download mbox | patch
Permalink /patch/12689/
State New, archived
Headers show

Comments

Tom Rini - Dec. 8, 2008, 8:02 a.m.
Hello,

gcc-4.3.x introduces a number of new warnings (and we use -Werror) for
things like not checking scanf return values and not using explicit
formatting.  Finally, it caught that we were overflowing our own buffer
in unubi.c, so increate the variable size as we want to declare and
clear PATH_MAX + 1, then use only PATH_MAX of the variable.

Signed-off-by: Tom Rini <trini@embeddedalley.com>
Artem Bityutskiy - Dec. 8, 2008, 11 a.m.
Hi,

thanks for the patch.

On Mon, 2008-12-08 at 01:02 -0700, Tom Rini wrote:
> gcc-4.3.x introduces a number of new warnings (and we use -Werror) for
> things like not checking scanf return values and not using explicit
> formatting.  Finally, it caught that we were overflowing our own buffer
> in unubi.c, so increate the variable size as we want to declare and
> clear PATH_MAX + 1, then use only PATH_MAX of the variable.
> 
> Signed-off-by: Tom Rini <trini@embeddedalley.com>
> 
> diff --git a/ubi-utils/new-utils/src/ubiformat.c b/ubi-utils/new-utils/src/ubiformat.c
> index 05caed9..9c3e0fb 100644
> --- a/ubi-utils/new-utils/src/ubiformat.c
> +++ b/ubi-utils/new-utils/src/ubiformat.c
> @@ -225,7 +225,8 @@ static int want_exit(void)
>  
>  	while (1) {
>  		normsg_cont("continue? (yes/no)  ");
> -		scanf("%3s", buf);
> +		if (!scanf("%3s", buf))
> +			return 1;

>From man scanf:

RETURN VALUE
These  functions  return  the  number  of input items successfully
matched and assigned, which can be fewer than provided for, or even zero
in the event of an early matching failure.

The value EOF is returned if the end of input is reached before either
the first successful conversion or a matching failure occurs.  EOF is
also returned  if a read error occurs, in which case the error indicator
for the stream (see ferror(3)) is set, and errno is set indicate the
error.

On this basis, I would say you should test for EOF, not for 0.

> +		if (!scanf("%3s", buf))
> +			return 0;

Similarly.
Artem Bityutskiy - Dec. 8, 2008, 1:09 p.m.
On Mon, 2008-12-08 at 13:00 +0200, Artem Bityutskiy wrote:
> >From man scanf:
> 
> RETURN VALUE
> These  functions  return  the  number  of input items successfully
> matched and assigned, which can be fewer than provided for, or even zero
> in the event of an early matching failure.
> 
> The value EOF is returned if the end of input is reached before either
> the first successful conversion or a matching failure occurs.  EOF is
> also returned  if a read error occurs, in which case the error indicator
> for the stream (see ferror(3)) is set, and errno is set indicate the
> error.
> 
> On this basis, I would say you should test for EOF, not for 0.
> 
> > +		if (!scanf("%3s", buf))
> > +			return 0;
> 
> Similarly.
> 

If you are fine with this, I may amend your patch and push it, because
otherwise it looks OK for me.
Tom Rini - Dec. 8, 2008, 4:06 p.m.
On Mon, Dec 08, 2008 at 03:09:42PM +0200, Artem Bityutskiy wrote:
> On Mon, 2008-12-08 at 13:00 +0200, Artem Bityutskiy wrote:
> > >From man scanf:
> > 
> > RETURN VALUE
> > These  functions  return  the  number  of input items successfully
> > matched and assigned, which can be fewer than provided for, or even zero
> > in the event of an early matching failure.
> > 
> > The value EOF is returned if the end of input is reached before either
> > the first successful conversion or a matching failure occurs.  EOF is
> > also returned  if a read error occurs, in which case the error indicator
> > for the stream (see ferror(3)) is set, and errno is set indicate the
> > error.
> > 
> > On this basis, I would say you should test for EOF, not for 0.
> > 
> > > +		if (!scanf("%3s", buf))
> > > +			return 0;
> > 
> > Similarly.
> > 
> 
> If you are fine with this, I may amend your patch and push it, because
> otherwise it looks OK for me.

Sounds good to me, thanks.

Patch

diff --git a/ubi-utils/new-utils/src/ubiformat.c b/ubi-utils/new-utils/src/ubiformat.c
index 05caed9..9c3e0fb 100644
--- a/ubi-utils/new-utils/src/ubiformat.c
+++ b/ubi-utils/new-utils/src/ubiformat.c
@@ -225,7 +225,8 @@  static int want_exit(void)
 
 	while (1) {
 		normsg_cont("continue? (yes/no)  ");
-		scanf("%3s", buf);
+		if (!scanf("%3s", buf))
+			return 1;
 		if (!strncmp(buf, "yes", 3) || !strncmp(buf, "y", 1))
 			return 0;
 		if (!strncmp(buf, "no", 2) || !strncmp(buf, "n", 1))
@@ -238,7 +239,8 @@  static int answer_is_yes(void)
 	char buf[4];
 
 	while (1) {
-		scanf("%3s", buf);
+		if (!scanf("%3s", buf))
+			return 0;
 		if (!strncmp(buf, "yes", 3) || !strncmp(buf, "y", 1))
 			return 1;
 		if (!strncmp(buf, "no", 2) || !strncmp(buf, "n", 1))
diff --git a/ubi-utils/src/libpfiflash.c b/ubi-utils/src/libpfiflash.c
index 7e3d3b3..cf18ad3 100644
--- a/ubi-utils/src/libpfiflash.c
+++ b/ubi-utils/src/libpfiflash.c
@@ -136,7 +136,7 @@  skip_raw_volumes(FILE* pfi, list_t pfi_raws,
 	}
 
  err:
-	EBUF(PFIFLASH_ERRSTR[-rc]);
+	EBUF("%s", PFIFLASH_ERRSTR[-rc]);
 	return rc;
 }
 
@@ -173,7 +173,7 @@  my_ubi_mkvol(int devno, int s, pfi_ubi_t u,
 	ulib = libubi_open();
 	if (ulib == NULL) {
 		rc = -PFIFLASH_ERR_UBI_OPEN;
-		EBUF(PFIFLASH_ERRSTR[-rc]);
+		EBUF("%s", PFIFLASH_ERRSTR[-rc]);
 		goto err;
 	}
 
@@ -239,7 +239,7 @@  my_ubi_rmvol(int devno, uint32_t id,
 	ulib = libubi_open();
 	if (ulib == NULL) {
 		rc = -PFIFLASH_ERR_UBI_OPEN;
-		EBUF(PFIFLASH_ERRSTR[-rc]);
+		EBUF("%s", PFIFLASH_ERRSTR[-rc]);
 		goto err;
 	}
 
@@ -323,7 +323,7 @@  read_bootenv_volume(int devno, uint32_t id, bootenv_t bootenv_old,
 	ulib = libubi_open();
 	if (ulib == NULL) {
 		rc = -PFIFLASH_ERR_UBI_OPEN;
-		EBUF(PFIFLASH_ERRSTR[-rc]);
+		EBUF("%s", PFIFLASH_ERRSTR[-rc]);
 		goto err;
 	}
 
@@ -342,7 +342,7 @@  read_bootenv_volume(int devno, uint32_t id, bootenv_t bootenv_old,
 	rc = bootenv_read(fp_in, bootenv_old, BOOTENV_MAXSIZE);
 	if (rc != 0) {
 		rc = -PFIFLASH_ERR_BOOTENV_READ;
-		EBUF(PFIFLASH_ERRSTR[-rc]);
+		EBUF("%s", PFIFLASH_ERRSTR[-rc]);
 		goto err;
 	}
 
@@ -421,7 +421,7 @@  write_bootenv_volume(int devno, uint32_t id, bootenv_t bootenv_old,
 	ulib = libubi_open();
 	if (ulib == NULL) {
 		rc = -PFIFLASH_ERR_UBI_OPEN;
-		EBUF(PFIFLASH_ERRSTR[-rc]);
+		EBUF("%s", PFIFLASH_ERRSTR[-rc]);
 		goto err;
 	}
 
@@ -442,7 +442,7 @@  write_bootenv_volume(int devno, uint32_t id, bootenv_t bootenv_old,
 	rc = bootenv_read_crc(fp_in, bootenv_new, fp_in_size, &crc);
 	if (rc != 0) {
 		rc = -PFIFLASH_ERR_BOOTENV_READ;
-		EBUF(PFIFLASH_ERRSTR[-rc]);
+		EBUF("%s", PFIFLASH_ERRSTR[-rc]);
 		goto err;
 	} else if (crc != pfi_crc) {
 		rc = -PFIFLASH_ERR_CRC_CHECK;
@@ -464,7 +464,7 @@  write_bootenv_volume(int devno, uint32_t id, bootenv_t bootenv_old,
 	rc = bootenv_size(bootenv_res, &update_size);
 	if (rc != 0) {
 		rc = -PFIFLASH_ERR_BOOTENV_SIZE;
-		EBUF(PFIFLASH_ERRSTR[-rc]);
+		EBUF("%s", PFIFLASH_ERRSTR[-rc]);
 		goto err;
 	}
 
@@ -554,7 +554,7 @@  write_normal_volume(int devno, uint32_t id, size_t update_size, FILE* fp_in,
 	ulib = libubi_open();
 	if (ulib == NULL) {
 		rc = -PFIFLASH_ERR_UBI_OPEN;
-		EBUF(PFIFLASH_ERRSTR[-rc]);
+		EBUF("%s", PFIFLASH_ERRSTR[-rc]);
 		goto err;
 	}
 
@@ -586,13 +586,13 @@  write_normal_volume(int devno, uint32_t id, size_t update_size, FILE* fp_in,
 			bytes_left : sizeof buf;
 		if (fread(buf, 1, to_rw, fp_in) != to_rw) {
 			rc = -PFIFLASH_ERR_EOF;
-			EBUF(PFIFLASH_ERRSTR[-rc]);
+			EBUF("%s", PFIFLASH_ERRSTR[-rc]);
 			goto err;
 		}
 		crc = clc_crc32(crc32_table, crc, buf, to_rw);
 		if (fwrite(buf, 1, to_rw, fp_out) != to_rw) {
 			rc = -PFIFLASH_ERR_FIO;
-			EBUF(PFIFLASH_ERRSTR[-rc]);
+			EBUF("%s", PFIFLASH_ERRSTR[-rc]);
 			goto err;
 		}
 		bytes_left -= to_rw;
@@ -770,7 +770,7 @@  static int compare_volumes(int devno, pfi_ubi_t u, FILE *fp_pfi,
 
 err:
 	if (rc < 0)
-		EBUF(PFIFLASH_ERRSTR[-rc]);
+		EBUF("%s", PFIFLASH_ERRSTR[-rc]);
 
 	for (i = 0; i < u->ids_size; i++)
 		fclose(fp_flash[i]);
@@ -877,11 +877,11 @@  process_raw_volumes(FILE* pfi, list_t pfi_raws, const char* rawdev,
 			int c = fgetc(pfi);
 			if (c == EOF) {
 				rc = -PFIFLASH_ERR_EOF;
-				EBUF(PFIFLASH_ERRSTR[-rc]);
+				EBUF("%s", PFIFLASH_ERRSTR[-rc]);
 				goto err;
 			} else if (ferror(pfi)) {
 				rc = -PFIFLASH_ERR_FIO;
-				EBUF(PFIFLASH_ERRSTR[-rc]);
+				EBUF("%s", PFIFLASH_ERRSTR[-rc]);
 				goto err;
 			}
 			pfi_data[j] = (char)c;
@@ -906,7 +906,7 @@  process_raw_volumes(FILE* pfi, list_t pfi_raws, const char* rawdev,
 		for (j = 0; j < r->starts_size; j++) {
 			rc = erase_mtd_region(mtd, r->starts[j], r->data_size);
 			if (rc) {
-				EBUF(PFIFLASH_ERRSTR[-rc]);
+				EBUF("%s", PFIFLASH_ERRSTR[-rc]);
 				goto err;
 			}
 
@@ -916,7 +916,7 @@  process_raw_volumes(FILE* pfi, list_t pfi_raws, const char* rawdev,
 				if (c == EOF) {
 					fclose(mtd);
 					rc = -PFIFLASH_ERR_EOF;
-					EBUF(PFIFLASH_ERRSTR[-rc]);
+					EBUF("%s", PFIFLASH_ERRSTR[-rc]);
 					goto err;
 				}
 				if ((char)c != pfi_data[k]) {
@@ -1100,7 +1100,7 @@  process_ubi_volumes(FILE* pfi, int seqnum, list_t pfi_ubis,
 			break;
 		default:
 			rc = -PFIFLASH_ERR_UBI_UNKNOWN;
-			EBUF(PFIFLASH_ERRSTR[-rc]);
+			EBUF("%s", PFIFLASH_ERRSTR[-rc]);
 			goto err;
 		}
 	}
@@ -1137,7 +1137,7 @@  mirror_ubi_volumes(uint32_t devno, list_t pfi_ubis,
 	ulib = libubi_open();
 	if (ulib == NULL) {
 		rc = -PFIFLASH_ERR_UBI_OPEN;
-		EBUF(PFIFLASH_ERRSTR[-rc]);
+		EBUF("%s", PFIFLASH_ERRSTR[-rc]);
 		goto err;
 	}
 
@@ -1259,7 +1259,7 @@  pfiflash_with_options(FILE* pfi, int complete, int seqnum, int compare,
 		pdd_f = pdd_funcs[pdd_handling];
 	else {
 		rc = -PFIFLASH_ERR_PDD_UNKNOWN;
-		EBUF(PFIFLASH_ERRSTR[-rc]);
+		EBUF("%s", PFIFLASH_ERRSTR[-rc]);
 		goto err;
 	}
 
diff --git a/ubi-utils/src/unubi.c b/ubi-utils/src/unubi.c
index ebd527c..7d65cfc 100644
--- a/ubi-utils/src/unubi.c
+++ b/ubi-utils/src/unubi.c
@@ -895,7 +895,7 @@  unubi_volumes(FILE* fpin, uint32_t *vols, size_t vc, struct args *a)
 	free(cur);
 
 	if (a->analyze) {
-		char fname[PATH_MAX];
+		char fname[PATH_MAX + 1];
 		FILE *fp;
 
 		unubi_analyze(&head, first, a->odir_path);