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From 529c94b47f886f99796cff0f5827d6c2ebdcea19 Mon Sep 17 00:00:00 2001
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From: Lennart Poettering <lennart@poettering.net>
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Date: Mon, 2 Mar 2015 20:55:38 +0100
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Subject: [PATCH] sd-daemon: replace VLA with alloca(), to make llvm happy
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https://bugs.freedesktop.org/show_bug.cgi?id=89379
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(cherry picked from commit d4a144fadf89bca681724c6c9a65b4a165fa0f90)
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---
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src/libsystemd/sd-daemon/sd-daemon.c | 12 +++++-------
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1 file changed, 5 insertions(+), 7 deletions(-)
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diff --git a/src/libsystemd/sd-daemon/sd-daemon.c b/src/libsystemd/sd-daemon/sd-daemon.c
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index 028c2a7a5b..22a3a5347a 100644
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--- a/src/libsystemd/sd-daemon/sd-daemon.c
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+++ b/src/libsystemd/sd-daemon/sd-daemon.c
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@@ -352,11 +352,7 @@ _public_ int sd_pid_notify_with_fds(pid_t pid, int unset_environment, const char
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.msg_iovlen = 1,
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.msg_name = &sockaddr,
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};
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- union {
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- struct cmsghdr cmsghdr;
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- uint8_t buf[CMSG_SPACE(sizeof(struct ucred)) +
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- CMSG_SPACE(sizeof(int) * n_fds)];
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- } control;
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+ struct cmsghdr *control;
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_cleanup_close_ int fd = -1;
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struct cmsghdr *cmsg = NULL;
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const char *e;
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@@ -400,8 +396,10 @@ _public_ int sd_pid_notify_with_fds(pid_t pid, int unset_environment, const char
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if (msghdr.msg_namelen > sizeof(struct sockaddr_un))
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msghdr.msg_namelen = sizeof(struct sockaddr_un);
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+ control = alloca(CMSG_SPACE(sizeof(struct ucred)) + CMSG_SPACE(sizeof(int) * n_fds));
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+
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if (n_fds > 0) {
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- msghdr.msg_control = &control;
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+ msghdr.msg_control = control;
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msghdr.msg_controllen = CMSG_LEN(sizeof(int) * n_fds);
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cmsg = CMSG_FIRSTHDR(&msghdr);
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@@ -418,7 +416,7 @@ _public_ int sd_pid_notify_with_fds(pid_t pid, int unset_environment, const char
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try_without_ucred = true;
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controllen_without_ucred = msghdr.msg_controllen;
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- msghdr.msg_control = &control;
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+ msghdr.msg_control = control;
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msghdr.msg_controllen += CMSG_LEN(sizeof(struct ucred));
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if (cmsg)
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