sandbox: add flags for open() call

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>

sandbox: add flags for open() call
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>
Simon Glass · Mike Frysinger
1 parent 7b06b66cd7
Showing 2 changed files with 33 additions and 8 deletions Side-by-side Diff
arch/sandbox/cpu/os.c
include/os.h
@@ -58,9 +58,29 @@
 	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)
 /*
+ * 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.
  * See file CREDITS for list of people who contributed to this
  * project.
@@ -19,12 +24,6 @@
  * MA 02111-1307 USA
  */
  
-/*
- * Operating System Interface
- *
- * This provides access to useful OS routines from the sandbox architecture
- */
-
 #ifndef __OS_H__
 #define __OS_H__
  
@@ -71,6 +70,12 @@
  * \return file descriptor, or -1 on error
  */
 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
...	...	@@ -58,9 +58,29 @@
58	58	return lseek(fd, offset, whence);
59	59	}
60	60
61		-int os_open(const char *pathname, int flags)
	61	+int os_open(const char *pathname, int os_flags)
62	62	{
63		- return open(pathname, flags);
	63	+ int flags;
	64	+
	65	+ switch (os_flags & OS_O_MASK) {
	66	+ case OS_O_RDONLY:
	67	+ default:
	68	+ flags = O_RDONLY;
	69	+ break;
	70	+
	71	+ case OS_O_WRONLY:
	72	+ flags = O_WRONLY;
	73	+ break;
	74	+
	75	+ case OS_O_RDWR:
	76	+ flags = O_RDWR;
	77	+ break;
	78	+ }
	79	+
	80	+ if (os_flags & OS_O_CREAT)
	81	+ flags \|= O_CREAT;
	82	+
	83	+ return open(pathname, flags, 0777);
64	84	}
65	85
66	86	int os_close(int fd)
1	1	/*
	2	+ * Operating System Interface
	3	+ *
	4	+ * This provides access to useful OS routines for the sandbox architecture.
	5	+ * They are kept in a separate file so we can include system headers.
	6	+ *
2	7	* Copyright (c) 2011 The Chromium OS Authors.
3	8	* See file CREDITS for list of people who contributed to this
4	9	* project.
...	...	@@ -19,12 +24,6 @@
19	24	* MA 02111-1307 USA
20	25	*/
21	26
22		-/*
23		- * Operating System Interface
24		- *
25		- * This provides access to useful OS routines from the sandbox architecture
26		- */
27		-
28	27	#ifndef __OS_H__
29	28	#define __OS_H__
30	29
...	...	@@ -71,6 +70,12 @@
71	70	* \return file descriptor, or -1 on error
72	71	*/
73	72	int os_open(const char *pathname, int flags);
	73	+
	74	+#define OS_O_RDONLY 0
	75	+#define OS_O_WRONLY 1
	76	+#define OS_O_RDWR 2
	77	+#define OS_O_MASK 3 /* Mask for read/write flags */
	78	+#define OS_O_CREAT 0100
74	79
75	80	/**
76	81	* Access to the OS close() system call