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Problem: tweetnacl leaks file descriptor on fork+exec

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Solution: open with O_CLOEXEC if available or set FD_CLOEXEC if not
This commit is contained in:
Luca Boccassi
2017-07-27 23:29:33 +01:00
parent e015a0f8b9
commit 2626fdfa23
5 changed files with 58 additions and 1 deletions
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10
src/tweetnacl.c
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@@ -951,11 +951,19 @@ int sodium_init (void)
{
if (fd == -1) {
for (;;) {
fd = open("/dev/urandom",O_RDONLY);
int flags = O_RDONLY;
#ifdef ZMQ_HAVE_O_CLOEXEC
flags |= O_CLOEXEC;
#endif
fd = open ("/dev/urandom", flags);
if (fd != -1)
break;
sleep (1);
}
#if !defined ZMQ_HAVE_O_CLOEXEC && defined FD_CLOEXEC
int rc = fcntl (fd, F_SETFD, FD_CLOEXEC);
assert (rc != -1);
#endif
}
return 0;
}