From 3f0c8096f3d5e3b37d6e0e26f0562c1a8669f0d8 Mon Sep 17 00:00:00 2001 From: Lennart Poettering 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 028c2a7a5b..22a3a5347a 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)