From 067a4cccc2ce6ff0fccd1351a1fef749b66342e1 Mon Sep 17 00:00:00 2001 From: Roland McGrath Date: Thu, 20 Aug 1998 05:56:35 +0000 Subject: 1998-08-20 Roland McGrath * return-buffer.c (iohelp_return_malloced_buffer): Moved here from ../libfshelp/return-buffer.c and renamed from fshelp to iohelp. * iohelp.h (iohelp_return_malloced_buffer): Declare it. --- libiohelp/return-buffer.c | 50 +++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 50 insertions(+) create mode 100644 libiohelp/return-buffer.c (limited to 'libiohelp/return-buffer.c') diff --git a/libiohelp/return-buffer.c b/libiohelp/return-buffer.c new file mode 100644 index 00000000..22f46e54 --- /dev/null +++ b/libiohelp/return-buffer.c @@ -0,0 +1,50 @@ +/* Make a malloced buffer suitable for returning from a mach rpc + + Copyright (C) 1996, 1998 Free Software Foundation, Inc. + + Written by Miles Bader + + This file is part of the GNU Hurd. + + The GNU Hurd is free software; you can redistribute it and/or + modify it under the terms of the GNU General Public License as + published by the Free Software Foundation; either version 2, or (at + your option) any later version. + + The GNU Hurd is distributed in the hope that it will be useful, but + WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + General Public License for more details. + + You should have received a copy of the GNU General Public License along + with this program; if not, write to the Free Software Foundation, Inc., + 675 Mass Ave, Cambridge, MA 02139, USA. */ + +#include +#include + +#include "iohelp.h" + +/* Puts data from the malloced buffer BUF, LEN bytes long, into RBUF & RLEN, + suitable for returning from a mach rpc. If LEN > 0, BUF is freed, + regardless of whether an error is returned or not. */ +error_t +iohelp_return_malloced_buffer (char *buf, size_t len, + char **rbuf, mach_msg_type_number_t *rlen) +{ + error_t err = 0; + + if (*rlen < len) + err = vm_allocate (mach_task_self (), (vm_address_t *)rbuf, len, 1); + if (! err) + { + if (len) + bcopy (buf, *rbuf, len); + *rlen = len; + } + + if (len > 0) + free (buf); + + return err; +} -- cgit v1.2.3