1 /* 2 * <sys/capability.h> 3 * 4 * Copyright (C) 1997 Aleph One 5 * Copyright (C) 1997-8,2008 Andrew G. Morgan <morgan@kernel.org> 6 * 7 * defunct POSIX.1e Standard: 25.2 Capabilities <sys/capability.h> 8 */ 9 10 #ifndef _SYS_CAPABILITY_H 11 #define _SYS_CAPABILITY_H 12 13 #ifdef __cplusplus 14 extern "C" { 15 #endif 16 17 /* 18 * This file complements the kernel file by providing prototype 19 * information for the user library. 20 */ 21 22 #include <sys/types.h> 23 #include <stdint.h> 24 #include <linux/types.h> 25 26 #ifndef __user 27 #define __user 28 #endif 29 #include <linux/capability.h> 30 31 /* 32 * POSIX capability types 33 */ 34 35 /* 36 * Opaque capability handle (defined internally by libcap) 37 * internal capability representation 38 */ 39 typedef struct _cap_struct *cap_t; 40 41 /* "external" capability representation is a (void *) */ 42 43 /* 44 * This is the type used to identify capabilities 45 */ 46 47 typedef int cap_value_t; 48 49 /* 50 * Set identifiers 51 */ 52 typedef enum { 53 CAP_EFFECTIVE=0, /* Specifies the effective flag */ 54 CAP_PERMITTED=1, /* Specifies the permitted flag */ 55 CAP_INHERITABLE=2 /* Specifies the inheritable flag */ 56 } cap_flag_t; 57 58 /* 59 * These are the states available to each capability 60 */ 61 typedef enum { 62 CAP_CLEAR=0, /* The flag is cleared/disabled */ 63 CAP_SET=1 /* The flag is set/enabled */ 64 } cap_flag_value_t; 65 66 /* 67 * User-space capability manipulation routines 68 */ 69 70 /* libcap/cap_alloc.c */ 71 extern cap_t cap_dup(cap_t); 72 extern int cap_free(void *); 73 extern cap_t cap_init(void); 74 75 /* libcap/cap_flag.c */ 76 extern int cap_get_flag(cap_t, cap_value_t, cap_flag_t, cap_flag_value_t *); 77 extern int cap_set_flag(cap_t, cap_flag_t, int, const cap_value_t *, 78 cap_flag_value_t); 79 extern int cap_clear(cap_t); 80 extern int cap_clear_flag(cap_t, cap_flag_t); 81 82 /* libcap/cap_file.c */ 83 extern cap_t cap_get_fd(int); 84 extern cap_t cap_get_file(const char *); 85 extern int cap_set_fd(int, cap_t); 86 extern int cap_set_file(const char *, cap_t); 87 88 /* libcap/cap_proc.c */ 89 extern cap_t cap_get_proc(void); 90 extern cap_t cap_get_pid(pid_t); 91 extern int cap_set_proc(cap_t); 92 93 extern int cap_get_bound(cap_value_t); 94 extern int cap_drop_bound(cap_value_t); 95 96 #define CAP_IS_SUPPORTED(cap) (cap_get_bound(cap) >= 0) 97 98 /* libcap/cap_extint.c */ 99 extern ssize_t cap_size(cap_t); 100 extern ssize_t cap_copy_ext(void *, cap_t, ssize_t); 101 extern cap_t cap_copy_int(const void *); 102 103 /* libcap/cap_text.c */ 104 extern cap_t cap_from_text(const char *); 105 extern char * cap_to_text(cap_t, ssize_t *); 106 extern int cap_from_name(const char *, cap_value_t *); 107 extern char * cap_to_name(cap_value_t); 108 109 #define CAP_DIFFERS(result, flag) (((result) & (1 << (flag))) != 0) 110 extern int cap_compare(cap_t, cap_t); 111 112 /* system calls - look to libc for function to system call mapping */ 113 extern int capset(cap_user_header_t header, cap_user_data_t data); 114 extern int capget(cap_user_header_t header, const cap_user_data_t data); 115 116 /* deprecated - use cap_get_pid() */ 117 extern int capgetp(pid_t pid, cap_t cap_d); 118 119 /* not valid with filesystem capability support - use cap_set_proc() */ 120 extern int capsetp(pid_t pid, cap_t cap_d); 121 122 #ifdef __cplusplus 123 } 124 #endif 125 126 #endif /* _SYS_CAPABILITY_H */ 127