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git.ipfire.org Git - thirdparty/systemd.git/blob - src/basic/missing_syscall.h
4 This file is part of systemd.
6 Copyright 2010 Lennart Poettering
7 Copyright 2016 Zbigniew Jędrzejewski-Szmek
9 systemd is free software; you can redistribute it and/or modify it
10 under the terms of the GNU Lesser General Public License as published by
11 the Free Software Foundation; either version 2.1 of the License, or
12 (at your option) any later version.
14 systemd is distributed in the hope that it will be useful, but
15 WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
17 Lesser General Public License for more details.
19 You should have received a copy of the GNU Lesser General Public License
20 along with systemd; If not, see <http://www.gnu.org/licenses/>.
23 /* Missing glibc definitions to access certain kernel APIs */
25 #if !HAVE_DECL_PIVOT_ROOT
26 static inline int pivot_root(const char *new_root
, const char *put_old
) {
27 return syscall(SYS_pivot_root
, new_root
, put_old
);
31 /* ======================================================================= */
33 #if !HAVE_DECL_MEMFD_CREATE
34 # ifndef __NR_memfd_create
35 # if defined __x86_64__
36 # define __NR_memfd_create 319
37 # elif defined __arm__
38 # define __NR_memfd_create 385
39 # elif defined __aarch64__
40 # define __NR_memfd_create 279
41 # elif defined __s390__
42 # define __NR_memfd_create 350
43 # elif defined _MIPS_SIM
44 # if _MIPS_SIM == _MIPS_SIM_ABI32
45 # define __NR_memfd_create 4354
47 # if _MIPS_SIM == _MIPS_SIM_NABI32
48 # define __NR_memfd_create 6318
50 # if _MIPS_SIM == _MIPS_SIM_ABI64
51 # define __NR_memfd_create 5314
53 # elif defined __i386__
54 # define __NR_memfd_create 356
55 # elif defined __arc__
56 # define __NR_memfd_create 279
58 # warning "__NR_memfd_create unknown for your architecture"
62 static inline int memfd_create(const char *name
, unsigned int flags
) {
63 # ifdef __NR_memfd_create
64 return syscall(__NR_memfd_create
, name
, flags
);
72 /* ======================================================================= */
74 #if !HAVE_DECL_GETRANDOM
75 # ifndef __NR_getrandom
76 # if defined __x86_64__
77 # define __NR_getrandom 318
78 # elif defined(__i386__)
79 # define __NR_getrandom 355
80 # elif defined(__arm__)
81 # define __NR_getrandom 384
82 # elif defined(__aarch64__)
83 # define __NR_getrandom 278
84 # elif defined(__ia64__)
85 # define __NR_getrandom 1339
86 # elif defined(__m68k__)
87 # define __NR_getrandom 352
88 # elif defined(__s390x__)
89 # define __NR_getrandom 349
90 # elif defined(__powerpc__)
91 # define __NR_getrandom 359
92 # elif defined _MIPS_SIM
93 # if _MIPS_SIM == _MIPS_SIM_ABI32
94 # define __NR_getrandom 4353
96 # if _MIPS_SIM == _MIPS_SIM_NABI32
97 # define __NR_getrandom 6317
99 # if _MIPS_SIM == _MIPS_SIM_ABI64
100 # define __NR_getrandom 5313
102 # elif defined(__arc__)
103 # define __NR_getrandom 278
105 # warning "__NR_getrandom unknown for your architecture"
109 static inline int getrandom(void *buffer
, size_t count
, unsigned flags
) {
110 # ifdef __NR_getrandom
111 return syscall(__NR_getrandom
, buffer
, count
, flags
);
119 /* ======================================================================= */
121 #if !HAVE_DECL_GETTID
122 static inline pid_t
gettid(void) {
123 return (pid_t
) syscall(SYS_gettid
);
127 /* ======================================================================= */
129 #if !HAVE_DECL_NAME_TO_HANDLE_AT
130 # ifndef __NR_name_to_handle_at
131 # if defined(__x86_64__)
132 # define __NR_name_to_handle_at 303
133 # elif defined(__i386__)
134 # define __NR_name_to_handle_at 341
135 # elif defined(__arm__)
136 # define __NR_name_to_handle_at 370
137 # elif defined(__powerpc__)
138 # define __NR_name_to_handle_at 345
139 # elif defined(__arc__)
140 # define __NR_name_to_handle_at 264
142 # error "__NR_name_to_handle_at is not defined"
147 unsigned int handle_bytes
;
149 unsigned char f_handle
[0];
152 static inline int name_to_handle_at(int fd
, const char *name
, struct file_handle
*handle
, int *mnt_id
, int flags
) {
153 # ifdef __NR_name_to_handle_at
154 return syscall(__NR_name_to_handle_at
, fd
, name
, handle
, mnt_id
, flags
);
162 /* ======================================================================= */
166 # if defined(__x86_64__)
167 # define __NR_setns 308
168 # elif defined(__i386__)
169 # define __NR_setns 346
170 # elif defined(__arc__)
171 # define __NR_setns 268
173 # error "__NR_setns is not defined"
177 static inline int setns(int fd
, int nstype
) {
179 return syscall(__NR_setns
, fd
, nstype
);
187 /* ======================================================================= */
189 static inline pid_t
raw_getpid(void) {
190 #if defined(__alpha__)
191 return (pid_t
) syscall(__NR_getxpid
);
193 return (pid_t
) syscall(__NR_getpid
);
197 /* ======================================================================= */
199 #if !HAVE_DECL_RENAMEAT2
200 # ifndef __NR_renameat2
201 # if defined __x86_64__
202 # define __NR_renameat2 316
203 # elif defined __arm__
204 # define __NR_renameat2 382
205 # elif defined __aarch64__
206 # define __NR_renameat2 276
207 # elif defined _MIPS_SIM
208 # if _MIPS_SIM == _MIPS_SIM_ABI32
209 # define __NR_renameat2 4351
211 # if _MIPS_SIM == _MIPS_SIM_NABI32
212 # define __NR_renameat2 6315
214 # if _MIPS_SIM == _MIPS_SIM_ABI64
215 # define __NR_renameat2 5311
217 # elif defined __i386__
218 # define __NR_renameat2 353
219 # elif defined __arc__
220 # define __NR_renameat2 276
222 # warning "__NR_renameat2 unknown for your architecture"
226 static inline int renameat2(int oldfd
, const char *oldname
, int newfd
, const char *newname
, unsigned flags
) {
227 # ifdef __NR_renameat2
228 return syscall(__NR_renameat2
, oldfd
, oldname
, newfd
, newname
, flags
);
236 /* ======================================================================= */
239 static inline int kcmp(pid_t pid1
, pid_t pid2
, int type
, unsigned long idx1
, unsigned long idx2
) {
241 return syscall(__NR_kcmp
, pid1
, pid2
, type
, idx1
, idx2
);
249 /* ======================================================================= */
251 #if !HAVE_DECL_KEYCTL
252 static inline long keyctl(int cmd
, unsigned long arg2
, unsigned long arg3
, unsigned long arg4
,unsigned long arg5
) {
254 return syscall(__NR_keyctl
, cmd
, arg2
, arg3
, arg4
, arg5
);
261 static inline key_serial_t
add_key(const char *type
, const char *description
, const void *payload
, size_t plen
, key_serial_t ringid
) {
263 return syscall(__NR_add_key
, type
, description
, payload
, plen
, ringid
);
270 static inline key_serial_t
request_key(const char *type
, const char *description
, const char * callout_info
, key_serial_t destringid
) {
271 # ifdef __NR_request_key
272 return syscall(__NR_request_key
, type
, description
, callout_info
, destringid
);
280 /* ======================================================================= */
282 #if !HAVE_DECL_COPY_FILE_RANGE
283 # ifndef __NR_copy_file_range
284 # if defined(__x86_64__)
285 # define __NR_copy_file_range 326
286 # elif defined(__i386__)
287 # define __NR_copy_file_range 377
288 # elif defined __s390__
289 # define __NR_copy_file_range 375
290 # elif defined __arm__
291 # define __NR_copy_file_range 391
292 # elif defined __aarch64__
293 # define __NR_copy_file_range 285
294 # elif defined __powerpc__
295 # define __NR_copy_file_range 379
296 # elif defined __arc__
297 # define __NR_copy_file_range 285
299 # warning "__NR_copy_file_range not defined for your architecture"
303 static inline ssize_t
copy_file_range(int fd_in
, loff_t
*off_in
,
304 int fd_out
, loff_t
*off_out
,
306 unsigned int flags
) {
307 # ifdef __NR_copy_file_range
308 return syscall(__NR_copy_file_range
, fd_in
, off_in
, fd_out
, off_out
, len
, flags
);