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-rw-r--r--tools/cws2fws.c5
1 files changed, 4 insertions, 1 deletions
diff --git a/tools/cws2fws.c b/tools/cws2fws.c
index c7b62df910..84feda959e 100644
--- a/tools/cws2fws.c
+++ b/tools/cws2fws.c
@@ -62,7 +62,10 @@ int main(int argc, char *argv[])
return 1;
}
- fstat(fd_in, &statbuf);
+ if (fstat(fd_in, &statbuf) < 0) {
+ perror("fstat failed");
+ return 1;
+ }
comp_len = statbuf.st_size;
uncomp_len = buf_in[4] | (buf_in[5] << 8) | (buf_in[6] << 16) | (buf_in[7] << 24);