[New-bugs-announce] [issue26835] Add file-sealing ops to fcntl

[Christian Heimes]

New submission from Christian Heimes:

The file-sealing ops are useful for memfd_create(). The new syscall and ops are only available on Linux with a recent kernel.

http://man7.org/linux/man-pages/man2/fcntl.2.html
http://man7.org/linux/man-pages/man2/memfd_create.2.html

Code:

#include <linux/fcntl.h>

#ifndef F_ADD_SEALS

/*
 * Set/Get seals
 */
#define F_ADD_SEALS     (F_LINUX_SPECIFIC_BASE + 9)
#define F_GET_SEALS     (F_LINUX_SPECIFIC_BASE + 10)

/*
 * Types of seals
 */
#define F_SEAL_SEAL     0x0001  /* prevent further seals from being set */
#define F_SEAL_SHRINK   0x0002  /* prevent file from shrinking */
#define F_SEAL_GROW     0x0004  /* prevent file from growing */
#define F_SEAL_WRITE    0x0008  /* prevent writes */
/* (1U << 31) is reserved for signed error codes */

#endif /* F_ADD_SEALS */

----------
assignee: christian.heimes
components: Extension Modules
messages: 264108
nosy: christian.heimes
priority: normal
severity: normal
stage: needs patch
status: open
title: Add file-sealing ops to fcntl
type: enhancement
versions: Python 3.6

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue26835>
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