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sandbox: add flags for open() call

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This provides a way for callers to create files for writing. The flags
are translated at runtime, for the ones we support.

Signed-off-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
This commit is contained in:
Simon Glass 2012-02-20 23:56:58 -05:00 • committed by Mike Frysinger
parent 7b06b66cd7
commit d9165153ca
2 changed files with 33 additions and 8 deletions
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24
arch/sandbox/cpu/os.c
View file

@ -58,9 +58,29 @@ off_t os_lseek(int fd, off_t offset, int whence)
return lseek(fd, offset, whence); return lseek(fd, offset, whence);
} }
int os_open(const char *pathname, int flags) int os_open(const char *pathname, int os_flags)
{ {
return open(pathname, flags); int flags;
switch (os_flags & OS_O_MASK) {
case OS_O_RDONLY:
default:
flags = O_RDONLY;
break;
case OS_O_WRONLY:
flags = O_WRONLY;
break;
case OS_O_RDWR:
flags = O_RDWR;
break;
}
if (os_flags & OS_O_CREAT)
flags |= O_CREAT;
return open(pathname, flags, 0777);
} }
int os_close(int fd) int os_close(int fd)

17
include/os.h
View file

@ -1,4 +1,9 @@
/* /*
* Operating System Interface
*
* This provides access to useful OS routines for the sandbox architecture.
* They are kept in a separate file so we can include system headers.
*
* Copyright (c) 2011 The Chromium OS Authors. * Copyright (c) 2011 The Chromium OS Authors.
* See file CREDITS for list of people who contributed to this * See file CREDITS for list of people who contributed to this
* project. * project.
@ -19,12 +24,6 @@
* MA 02111-1307 USA * MA 02111-1307 USA
*/ */
/*
* Operating System Interface
*
* This provides access to useful OS routines from the sandbox architecture
*/
#ifndef __OS_H__ #ifndef __OS_H__
#define __OS_H__ #define __OS_H__
@ -72,6 +71,12 @@ off_t os_lseek(int fd, off_t offset, int whence);
*/ */
int os_open(const char *pathname, int flags); int os_open(const char *pathname, int flags);
#define OS_O_RDONLY 0
#define OS_O_WRONLY 1
#define OS_O_RDWR 2
#define OS_O_MASK 3 /* Mask for read/write flags */
#define OS_O_CREAT 0100
/** /**
* Access to the OS close() system call * Access to the OS close() system call
* *