mtd-utils: Fix some simple cases of uninitialized value reads

This patch modifies the internal helpers to read and parse integers
from sysfs files by initializing them first and removes turns an
obscure "a = open(...) if (a >= 0) {...} if (a == -1) {...}" inside
recv_image into a more straight forward if/else branch.

Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>

1 files changed, 1 insertions, 0 deletions

diff --git a/lib/libubi.c b/lib/libubi.c
index 4322a19..aaeeb38 100644
--- a/lib/libubi.c
+++ b/lib/libubi.c
@@ -94,6 +94,7 @@ static int read_positive_ll(const char *file, long long *value)
 	}
 	buf[rd] = '\0';
 
+	*value = 0;
 	if (sscanf(buf, "%lld\n", value) != 1) {
 		errmsg("cannot read integer from \"%s\"\n", file);
 		errno = EINVAL;