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      1 // Copyright 2015 The Chromium Authors. All rights reserved.
      2 // Use of this source code is governed by a BSD-style license that can be
      3 // found in the LICENSE file.
      4 
      5 #ifndef SANDBOX_LINUX_SYSTEM_HEADERS_LINUX_CAPABILITY_H_
      6 #define SANDBOX_LINUX_SYSTEM_HEADERS_LINUX_CAPABILITY_H_
      7 
      8 #include <stdint.h>
      9 
     10 // The following macros are taken from linux/capability.h.
     11 // We only support capability version 3, which was introduced in Linux 2.6.26.
     12 #ifndef _LINUX_CAPABILITY_VERSION_3
     13 #define _LINUX_CAPABILITY_VERSION_3 0x20080522
     14 #endif
     15 #ifndef _LINUX_CAPABILITY_U32S_3
     16 #define _LINUX_CAPABILITY_U32S_3 2
     17 #endif
     18 #ifndef CAP_TO_INDEX
     19 #define CAP_TO_INDEX(x) ((x) >> 5)  // 1 << 5 == bits in __u32
     20 #endif
     21 #ifndef CAP_TO_MASK
     22 #define CAP_TO_MASK(x) (1 << ((x) & 31))  // mask for indexed __u32
     23 #endif
     24 #ifndef CAP_SYS_CHROOT
     25 #define CAP_SYS_CHROOT 18
     26 #endif
     27 #ifndef CAP_SYS_ADMIN
     28 #define CAP_SYS_ADMIN 21
     29 #endif
     30 
     31 struct cap_hdr {
     32   uint32_t version;
     33   int pid;
     34 };
     35 
     36 struct cap_data {
     37   uint32_t effective;
     38   uint32_t permitted;
     39   uint32_t inheritable;
     40 };
     41 
     42 #endif  // SANDBOX_LINUX_SYSTEM_HEADERS_LINUX_CAPABILITY_H_
     43