mirror of
https://git.freebsd.org/ports.git
synced 2025-06-12 00:00:33 -04:00
89 lines
2.3 KiB
C
89 lines
2.3 KiB
C
--- dbus/dbus-sysdeps-unix.c.orig 2023-08-16 10:29:50 UTC
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+++ dbus/dbus-sysdeps-unix.c
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@@ -37,6 +37,7 @@
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#include "dbus-credentials.h"
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#include "dbus-nonce.h"
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+#include <limits.h>
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#include <sys/types.h>
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#include <stdlib.h>
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#include <string.h>
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@@ -62,6 +63,9 @@
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#ifdef HAVE_ERRNO_H
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#include <errno.h>
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#endif
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+#ifdef HAVE_LINUX_CLOSE_RANGE_H
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+#include <linux/close_range.h>
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+#endif
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#ifdef HAVE_SYSLOG_H
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#include <syslog.h>
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#endif
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@@ -80,6 +84,9 @@
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#ifdef HAVE_SYS_RANDOM_H
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#include <sys/random.h>
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#endif
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+#ifdef HAVE_SYS_SYSCALL_H
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+#include <sys/syscall.h>
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+#endif
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#ifdef HAVE_ADT
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#include <bsm/adt.h>
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@@ -137,6 +144,21 @@
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#endif /* Solaris */
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+#if defined(__linux__) && defined(__NR_close_range) && !defined(HAVE_CLOSE_RANGE)
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+/* The kernel headers are new enough to have the close_range syscall,
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+ * but glibc isn't new enough to have the syscall wrapper, so call the
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+ * syscall directly. */
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+static inline int
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+close_range (unsigned int first,
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+ unsigned int last,
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+ unsigned int flags)
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+{
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+ return syscall (__NR_close_range, first, last, flags);
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+}
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+/* Now we can call that inline wrapper as though it was provided by glibc. */
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+#define HAVE_CLOSE_RANGE
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+#endif
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+
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/**
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* Ensure that the standard file descriptors stdin, stdout and stderr
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* are open, by opening /dev/null if necessary.
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@@ -4791,7 +4813,24 @@ _dbus_close_all (void)
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void
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_dbus_close_all (void)
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{
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+#ifdef HAVE_CLOSE_RANGE
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+ if (close_range (3, INT_MAX, 0) == 0)
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+ return;
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+#endif
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+
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+ /* Some library implementations of closefrom() are not async-signal-safe,
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+ * and we call _dbus_close_all() after forking, so we only do this on
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+ * operating systems where we know that closefrom() is a system call */
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+#if defined(HAVE_CLOSEFROM) && ( \
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+ defined(__FreeBSD__) || \
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+ defined(__NetBSD__) || \
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+ defined(__OpenBSD__) || \
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+ defined(__sun__) && defined(F_CLOSEFROM) \
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+)
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+ closefrom (3);
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+#else
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act_on_fds_3_and_up (close_ignore_error);
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+#endif
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}
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/**
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@@ -4801,6 +4840,11 @@ _dbus_fd_set_all_close_on_exec (void)
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void
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_dbus_fd_set_all_close_on_exec (void)
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{
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+#if defined(HAVE_CLOSE_RANGE) && defined(CLOSE_RANGE_CLOEXEC)
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+ if (close_range (3, INT_MAX, CLOSE_RANGE_CLOEXEC) == 0)
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+ return;
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+#endif
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+
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act_on_fds_3_and_up (_dbus_fd_set_close_on_exec);
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}
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