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From 529c94b47f886f99796cff0f5827d6c2ebdcea19 Mon Sep 17 00:00:00 2001
From: Lennart Poettering <lennart@poettering.net>
Date: Mon, 2 Mar 2015 20:55:38 +0100
Subject: [PATCH] sd-daemon: replace VLA with alloca(), to make llvm happy
https://bugs.freedesktop.org/show_bug.cgi?id=89379
(cherry picked from commit d4a144fadf89bca681724c6c9a65b4a165fa0f90)
---
src/libsystemd/sd-daemon/sd-daemon.c | 12 +++++-------
1 file changed, 5 insertions(+), 7 deletions(-)
diff --git a/src/libsystemd/sd-daemon/sd-daemon.c b/src/libsystemd/sd-daemon/sd-daemon.c
index 028c2a7a5..22a3a5347 100644
--- a/src/libsystemd/sd-daemon/sd-daemon.c
+++ b/src/libsystemd/sd-daemon/sd-daemon.c
@@ -352,11 +352,7 @@ _public_ int sd_pid_notify_with_fds(pid_t pid, int unset_environment, const char
.msg_iovlen = 1,
.msg_name = &sockaddr,
};
- union {
- struct cmsghdr cmsghdr;
- uint8_t buf[CMSG_SPACE(sizeof(struct ucred)) +
- CMSG_SPACE(sizeof(int) * n_fds)];
- } control;
+ struct cmsghdr *control;
_cleanup_close_ int fd = -1;
struct cmsghdr *cmsg = NULL;
const char *e;
@@ -400,8 +396,10 @@ _public_ int sd_pid_notify_with_fds(pid_t pid, int unset_environment, const char
if (msghdr.msg_namelen > sizeof(struct sockaddr_un))
msghdr.msg_namelen = sizeof(struct sockaddr_un);
+ control = alloca(CMSG_SPACE(sizeof(struct ucred)) + CMSG_SPACE(sizeof(int) * n_fds));
+
if (n_fds > 0) {
- msghdr.msg_control = &control;
+ msghdr.msg_control = control;
msghdr.msg_controllen = CMSG_LEN(sizeof(int) * n_fds);
cmsg = CMSG_FIRSTHDR(&msghdr);
@@ -418,7 +416,7 @@ _public_ int sd_pid_notify_with_fds(pid_t pid, int unset_environment, const char
try_without_ucred = true;
controllen_without_ucred = msghdr.msg_controllen;
- msghdr.msg_control = &control;
+ msghdr.msg_control = control;
msghdr.msg_controllen += CMSG_LEN(sizeof(struct ucred));
if (cmsg)