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From ae2352bca9b4e607538412da0cc2a9625cd8b692 Mon Sep 17 00:00:00 2001
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From: Sam James <sam@gentoo.org>
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Date: Sat, 24 Jul 2021 22:02:45 +0100
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Subject: [PATCH] util/ulockmgr_server.c: conditionally define closefrom (fix
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glibc-2.34+)
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closefrom(3) has joined us in glibc-land from *BSD and Solaris. Since
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it's available in glibc 2.34+, we want to detect it and only define our
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fallback if the libc doesn't provide it.
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Bug: https://bugs.gentoo.org/803923
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Signed-off-by: Sam James <sam@gentoo.org>
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---
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configure.ac | 1 +
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util/ulockmgr_server.c | 6 ++++++
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2 files changed, 7 insertions(+)
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diff --git a/configure.ac b/configure.ac
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index 9946a0efa..a2d481aa9 100644
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--- a/configure.ac
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+++ b/configure.ac
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@@ -55,6 +55,7 @@ fi
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AC_CHECK_FUNCS([fork setxattr fdatasync splice vmsplice utimensat])
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AC_CHECK_FUNCS([posix_fallocate])
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+AC_CHECK_FUNCS([closefrom])
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AC_CHECK_MEMBERS([struct stat.st_atim])
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AC_CHECK_MEMBERS([struct stat.st_atimespec])
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diff --git a/util/ulockmgr_server.c b/util/ulockmgr_server.c
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index 273c7d923..a04dac5c6 100644
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--- a/util/ulockmgr_server.c
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+++ b/util/ulockmgr_server.c
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@@ -22,6 +22,10 @@
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#include <sys/socket.h>
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#include <sys/wait.h>
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+#ifdef HAVE_CONFIG_H
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+ #include "config.h"
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+#endif
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+
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struct message {
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unsigned intr : 1;
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unsigned nofd : 1;
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@@ -124,6 +128,7 @@ static int receive_message(int sock, void *buf, size_t buflen, int *fdp,
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return res;
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}
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+#if !defined(HAVE_CLOSEFROM)
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static int closefrom(int minfd)
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{
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DIR *dir = opendir("/proc/self/fd");
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@@ -141,6 +146,7 @@ static int closefrom(int minfd)
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}
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return 0;
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}
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+#endif
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static void send_reply(int cfd, struct message *msg)
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{
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