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util/ulockmgr_server.c: conditionally define closefrom (fix glibc-2.34+)

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closefrom(3) has joined us in glibc-land from *BSD and Solaris. Since
it's available in glibc 2.34+, we want to detect it and only define our
fallback if the libc doesn't provide it.

Bug: https://bugs.gentoo.org/803923
Signed-off-by: Sam James <sam@gentoo.org>
This commit is contained in:
Sam James 2021-07-24 22:02:45 +01:00 committed by Nikolaus Rath
parent 5d38afc8a5
commit 5a43d0f724
2 changed files with 7 additions and 0 deletions
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1
configure.ac
View File

@ -55,6 +55,7 @@ fi
AC_CHECK_FUNCS([fork setxattr fdatasync splice vmsplice utimensat])
AC_CHECK_FUNCS([posix_fallocate])
AC_CHECK_FUNCS([closefrom])
AC_CHECK_MEMBERS([struct stat.st_atim])
AC_CHECK_MEMBERS([struct stat.st_atimespec])

6
util/ulockmgr_server.c
View File

@ -22,6 +22,10 @@
#include <sys/socket.h>
#include <sys/wait.h>
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
struct message {
unsigned intr : 1;
unsigned nofd : 1;
@ -124,6 +128,7 @@ static int receive_message(int sock, void *buf, size_t buflen, int *fdp,
return res;
}
#if !defined(HAVE_CLOSEFROM)
static int closefrom(int minfd)
{
DIR *dir = opendir("/proc/self/fd");
@ -141,6 +146,7 @@ static int closefrom(int minfd)
}
return 0;
}
#endif
static void send_reply(int cfd, struct message *msg)
{