Implement _PC_PIPE_BUF.

Now that the kernel has appropriate support we can implement this
fpathconf command correctly.

diff --git a/ChangeLog b/ChangeLog
index 2bfc912..946e945 100644 (file)
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+2010-07-06  Ulrich Drepper  <drepper@redhat.com>
+
+       * sysdeps/unix/sysv/linux/fpathconf.c (__fpathconf): Implement
+       _PC_PIPE_BUF using F_GETPIPE_SZ.
+
 2010-07-02  Ulrich Drepper  <drepper@redhat.com>
 
        * elf/Makefile: Fix linking for a few tests to make recent linker

diff --git a/sysdeps/unix/sysv/linux/fpathconf.c b/sysdeps/unix/sysv/linux/fpathconf.c
index 2701c9e..67dc384 100644 (file)
--- a/sysdeps/unix/sysv/linux/fpathconf.c
+++ b/sysdeps/unix/sysv/linux/fpathconf.c
@@ -1,5 +1,6 @@
 /* Get file-specific information about descriptor FD.  Linux version.
-   Copyright (C) 1991,1995,1996,1998-2003,2008 Free Software Foundation, Inc.
+   Copyright (C) 1991,1995,1996,1998-2003,2008,2010
+   Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
@@ -17,6 +18,7 @@
    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
    02111-1307 USA.  */
 
+#include <fcntl.h>
 #include "pathconf.h"
 
 static long int posix_fpathconf (int fd, int name);
@@ -33,6 +35,7 @@ __fpathconf (fd, name)
      int name;
 {
   struct statfs fsbuf;
+  int r;
 
   switch (name)
     {
@@ -48,6 +51,12 @@ __fpathconf (fd, name)
     case _PC_CHOWN_RESTRICTED:
       return __statfs_chown_restricted (__fstatfs (fd, &fsbuf), &fsbuf);
 
+    case _PC_PIPE_BUF:
+      r = fcntl (fd, F_GETPIPE_SZ);
+      if (r > 0)
+       return r;
+      /* FALLTHROUGH */
+
     default:
       return posix_fpathconf (fd, name);
     }