Add thread-safe wrapper for fpathconf(2) syscall.

Reviewed by:	jlemon

3 files changed, 48 insertions, 0 deletions

diff --git a/lib/libc_r/uthread/Makefile.inc b/lib/libc_r/uthread/Makefile.inc
index 36c0834..fe19b0e 100644
--- a/lib/libc_r/uthread/Makefile.inc
+++ b/lib/libc_r/uthread/Makefile.inc
@@ -49,6 +49,7 @@ SRCS+= \
 	uthread_find_thread.c \
 	uthread_flock.c \
 	uthread_fork.c \
+	uthread_fpathconf.c \
 	uthread_fstat.c \
 	uthread_fstatfs.c \
 	uthread_fsync.c \
diff --git a/lib/libc_r/uthread/pthread_private.h b/lib/libc_r/uthread/pthread_private.h
index 8058469..9d76747 100644
--- a/lib/libc_r/uthread/pthread_private.h
+++ b/lib/libc_r/uthread/pthread_private.h
@@ -1204,6 +1204,7 @@ int     _thread_sys_ftruncate(int, off_t);
 int     _thread_sys_pause(void);
 int     _thread_sys_pipe(int *);
 int     _thread_sys_select(int, fd_set *, fd_set *, fd_set *, struct timeval *);
+long    _thread_sys_fpathconf(int, int);
 off_t   _thread_sys_lseek(int, off_t, int);
 pid_t   _thread_sys_fork(void);
 pid_t   _thread_sys_tcgetpgrp(int);
diff --git a/lib/libc_r/uthread/uthread_fpathconf.c b/lib/libc_r/uthread/uthread_fpathconf.c
new file mode 100644
index 0000000..04fae27
--- /dev/null
+++ b/lib/libc_r/uthread/uthread_fpathconf.c
@@ -0,0 +1,46 @@
+/*
+ * Copyright (c) 2000 Maxim Sobolev <sobomax@FreeBSD.org>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ * $FreeBSD$
+ */
+#include <unistd.h>
+#ifdef _THREAD_SAFE
+#include <pthread.h>
+#include "pthread_private.h"
+
+long
+_fpathconf(int fd, int name)
+{
+	long            ret;
+
+	if ((ret = _FD_LOCK(fd, FD_READ, NULL)) == 0) {
+		ret = _thread_sys_fpathconf(fd, name);
+		_FD_UNLOCK(fd, FD_READ);
+	}
+	return ret;
+}
+
+__strong_reference(_fpathconf, fpathconf);
+#endif