fuzyll / libctf Goto Github PK
View Code? Open in Web Editor NEWLibrary for creating CTF services.
Library for creating CTF services.
You cannot call ctf_randfd
on stdin.
getrlimit(RLIMIT_NOFILE, {rlim_cur=1024, rlim_max=64*1024}) = 0
open("/dev/urandom", O_RDONLY) = 3
close(3) = 0
dup2(0, 0) = 0
close(0) = 0
I recommend the following fix:
diff --git a/ctf.c.1 b/ctf.c
index 2fabd62..4781277 100644
--- a/ctf.c.1
+++ b/ctf.c
@@ -250,11 +250,11 @@ int ctf_randfd(int old)
// randomize new file descriptor
if (fd < 0) {
- while (new < old) {
+ while (new <= old) {
new = rand() % max; // fall back to rand() if fd was invalid
}
} else {
- while (new < old) {
+ while (new <= old) {
read(fd, &new, 2);
new %= max;
}
libctf/ctf.c:258:13: warning: ignoring return value of βreadβ, declared with attribute warn_unused_result [-Wunused-result]
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