From c67cd904d454ef10ff53871a4aa14e10c24fa598 Mon Sep 17 00:00:00 2001 From: Miles Bader Date: Fri, 21 Jun 1996 04:06:09 +0000 Subject: Initial revision --- libfshelp/return-buffer.c | 50 +++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 50 insertions(+) create mode 100644 libfshelp/return-buffer.c diff --git a/libfshelp/return-buffer.c b/libfshelp/return-buffer.c new file mode 100644 index 00000000..58c704f3 --- /dev/null +++ b/libfshelp/return-buffer.c @@ -0,0 +1,50 @@ +/* Make a malloced buffer suitable for returning from a mach rpc + + Copyright (C) 1996 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 "fshelp.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 +fshelp_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