If read_sysfs_file_string() encounters a zero-length file, it will write
'\0' at index -1 of the provided buffer. Handle zero-length files
gracefully by falling through to the error handler which does the right
thing (tm).
Signed-off-by: Carl-Daniel Hailfinger <c-d.hailfinger.devel.2006@xxxxxxx>
diff --git a/lsusb-t.c b/lsusb-t.c
index 8bcdbf1..5438704 100644
--- a/lsusb-t.c
+++ b/lsusb-t.c
@@ -235,7 +235,7 @@ static void read_sysfs_file_string(const char *d_name, const char *file, char *b
goto error;
r = read(fd, buf, len);
close(fd);
- if (r >= 0 && r < len) {
+ if (r > 0 && r < len) {
buf[r] = '\0';
r--;
while (buf[r] == '\n') {
--
http://www.hailfinger.org/
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