Check return value of fscanf()/fwrite()/fread()
Fix build error on distros with warn_unused_result attributes in glibc.
Corresponding to flashrom svn r378 and coreboot v2 svn r3857.
Signed-off-by: Peter Stuge <peter@stuge.se>
Acked-by: Yul Rottmann <yulrottmann@bitel.net>
diff --git a/flashrom.c b/flashrom.c
index 623ce7f..9c8db6e 100644
--- a/flashrom.c
+++ b/flashrom.c
@@ -296,7 +296,7 @@
int main(int argc, char *argv[])
{
uint8_t *buf;
- unsigned long size;
+ unsigned long size, numbytes;
uint32_t erasedbytes;
FILE *image;
/* Probe for up to three flash chips. */
@@ -517,11 +517,11 @@
exclude_end_position -
exclude_start_position);
- fwrite(buf, sizeof(char), size, image);
+ numbytes = fwrite(buf, 1, size, image);
fclose(image);
- printf("done.\n");
+ printf("%s.\n", numbytes == size ? "done" : "FAILED");
free(buf);
- exit(0);
+ return numbytes != size;
}
// FIXME: flash writes stay enabled!
exit(1);
@@ -615,9 +615,11 @@
memset(buf + exclude_start_position, 0,
exclude_end_position - exclude_start_position);
- fwrite(buf, sizeof(char), size, image);
+ numbytes = fwrite(buf, 1, size, image);
fclose(image);
- printf("done.\n");
+ printf("%s.\n", numbytes == size ? "done" : "FAILED");
+ if (numbytes != size)
+ return 1;
} else {
struct stat image_stat;
@@ -634,9 +636,13 @@
exit(1);
}
- fread(buf, sizeof(char), size, image);
+ numbytes = fread(buf, 1, size, image);
show_id(buf, size, force);
fclose(image);
+ if (numbytes != size) {
+ fprintf(stderr, "Error: Failed to read file. Got %ld bytes, wanted %ld!\n", numbytes, size);
+ return 1;
+ }
}
/* exclude range stuff. Nice idea, but at the moment it is only
diff --git a/layout.c b/layout.c
index e2be12e..84a8ec7 100644
--- a/layout.c
+++ b/layout.c
@@ -146,8 +146,8 @@
while (!feof(romlayout)) {
char *tstr1, *tstr2;
- fscanf(romlayout, "%s %s\n", tempstr,
- rom_entries[romimages].name);
+ if (2 != fscanf(romlayout, "%s %s\n", tempstr, rom_entries[romimages].name))
+ continue;
#if 0
// fscanf does not like arbitrary comments like that :( later
if (tempstr[0] == '#') {