1 /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
6 This file is part of systemd.
8 Copyright 2010 Lennart Poettering
10 systemd is free software; you can redistribute it and/or modify it
11 under the terms of the GNU Lesser General Public License as published by
12 the Free Software Foundation; either version 2.1 of the License, or
13 (at your option) any later version.
15 systemd is distributed in the hope that it will be useful, but
16 WITHOUT ANY WARRANTY; without even the implied warranty of
17 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
18 Lesser General Public License for more details.
20 You should have received a copy of the GNU Lesser General Public License
21 along with systemd; If not, see <http://www.gnu.org/licenses/>.
24 /* Missing glibc definitions to access certain kernel APIs */
26 #include <sys/resource.h>
27 #include <sys/syscall.h>
32 #include <linux/oom.h>
33 #include <linux/input.h>
34 #include <linux/if_link.h>
35 #include <linux/loop.h>
36 #include <linux/audit.h>
37 #include <linux/capability.h>
38 #include <linux/neighbour.h>
45 #include <asm/sgidefs.h>
48 #ifdef HAVE_LINUX_BTRFS_H
49 #include <linux/btrfs.h>
55 #define RLIMIT_RTTIME 15
58 /* If RLIMIT_RTTIME is not defined, then we cannot use RLIMIT_NLIMITS as is */
59 #define _RLIMIT_MAX (RLIMIT_RTTIME+1 > RLIMIT_NLIMITS ? RLIMIT_RTTIME+1 : RLIMIT_NLIMITS)
61 #ifndef F_LINUX_SPECIFIC_BASE
62 #define F_LINUX_SPECIFIC_BASE 1024
66 #define F_SETPIPE_SZ (F_LINUX_SPECIFIC_BASE + 7)
70 #define F_GETPIPE_SZ (F_LINUX_SPECIFIC_BASE + 8)
74 #define F_ADD_SEALS (F_LINUX_SPECIFIC_BASE + 9)
75 #define F_GET_SEALS (F_LINUX_SPECIFIC_BASE + 10)
77 #define F_SEAL_SEAL 0x0001 /* prevent further seals from being set */
78 #define F_SEAL_SHRINK 0x0002 /* prevent file from shrinking */
79 #define F_SEAL_GROW 0x0004 /* prevent file from growing */
80 #define F_SEAL_WRITE 0x0008 /* prevent writes */
84 #define F_OFD_GETLK 36
85 #define F_OFD_SETLK 37
86 #define F_OFD_SETLKW 38
89 #ifndef MFD_ALLOW_SEALING
90 #define MFD_ALLOW_SEALING 0x0002U
94 #define MFD_CLOEXEC 0x0001U
98 #define IP_FREEBIND 15
101 #ifndef OOM_SCORE_ADJ_MIN
102 #define OOM_SCORE_ADJ_MIN (-1000)
105 #ifndef OOM_SCORE_ADJ_MAX
106 #define OOM_SCORE_ADJ_MAX 1000
109 #ifndef AUDIT_SERVICE_START
110 #define AUDIT_SERVICE_START 1130 /* Service (daemon) start */
113 #ifndef AUDIT_SERVICE_STOP
114 #define AUDIT_SERVICE_STOP 1131 /* Service (daemon) stop */
118 #define TIOCVHANGUP 0x5437
121 #ifndef IP_TRANSPARENT
122 #define IP_TRANSPARENT 19
126 #define SOL_NETLINK 270
129 #if !HAVE_DECL_PIVOT_ROOT
130 static inline int pivot_root(const char *new_root, const char *put_old) {
131 return syscall(SYS_pivot_root, new_root, put_old);
135 #ifndef __NR_memfd_create
136 # if defined __x86_64__
137 # define __NR_memfd_create 319
138 # elif defined __arm__
139 # define __NR_memfd_create 385
140 # elif defined __aarch64__
141 # define __NR_memfd_create 279
142 # elif defined _MIPS_SIM
143 # if _MIPS_SIM == _MIPS_SIM_ABI32
144 # define __NR_memfd_create 4354
146 # if _MIPS_SIM == _MIPS_SIM_NABI32
147 # define __NR_memfd_create 6318
149 # if _MIPS_SIM == _MIPS_SIM_ABI64
150 # define __NR_memfd_create 5314
152 # elif defined __i386__
153 # define __NR_memfd_create 356
155 # warning "__NR_memfd_create unknown for your architecture"
156 # define __NR_memfd_create 0xffffffff
160 #ifndef HAVE_MEMFD_CREATE
161 static inline int memfd_create(const char *name, unsigned int flags) {
162 return syscall(__NR_memfd_create, name, flags);
166 #ifndef __NR_getrandom
167 # if defined __x86_64__
168 # define __NR_getrandom 318
169 # elif defined(__i386__)
170 # define __NR_getrandom 355
171 # elif defined(__arm__)
172 # define __NR_getrandom 384
173 # elif defined(__aarch64__)
174 # define __NR_getrandom 278
175 # elif defined(__ia64__)
176 # define __NR_getrandom 1339
177 # elif defined(__m68k__)
178 # define __NR_getrandom 352
179 # elif defined(__s390x__)
180 # define __NR_getrandom 349
181 # elif defined(__powerpc__)
182 # define __NR_getrandom 359
183 # elif defined _MIPS_SIM
184 # if _MIPS_SIM == _MIPS_SIM_ABI32
185 # define __NR_getrandom 4353
187 # if _MIPS_SIM == _MIPS_SIM_NABI32
188 # define __NR_getrandom 6317
190 # if _MIPS_SIM == _MIPS_SIM_ABI64
191 # define __NR_getrandom 5313
194 # warning "__NR_getrandom unknown for your architecture"
195 # define __NR_getrandom 0xffffffff
199 #if !HAVE_DECL_GETRANDOM
200 static inline int getrandom(void *buffer, size_t count, unsigned flags) {
201 return syscall(__NR_getrandom, buffer, count, flags);
205 #ifndef GRND_NONBLOCK
206 #define GRND_NONBLOCK 0x0001
210 #define GRND_RANDOM 0x0002
213 #ifndef BTRFS_IOCTL_MAGIC
214 #define BTRFS_IOCTL_MAGIC 0x94
217 #ifndef BTRFS_PATH_NAME_MAX
218 #define BTRFS_PATH_NAME_MAX 4087
221 #ifndef BTRFS_DEVICE_PATH_NAME_MAX
222 #define BTRFS_DEVICE_PATH_NAME_MAX 1024
225 #ifndef BTRFS_FSID_SIZE
226 #define BTRFS_FSID_SIZE 16
229 #ifndef BTRFS_UUID_SIZE
230 #define BTRFS_UUID_SIZE 16
233 #ifndef HAVE_LINUX_BTRFS_H
234 struct btrfs_ioctl_vol_args {
236 char name[BTRFS_PATH_NAME_MAX + 1];
239 struct btrfs_ioctl_dev_info_args {
240 uint64_t devid; /* in/out */
241 uint8_t uuid[BTRFS_UUID_SIZE]; /* in/out */
242 uint64_t bytes_used; /* out */
243 uint64_t total_bytes; /* out */
244 uint64_t unused[379]; /* pad to 4k */
245 char path[BTRFS_DEVICE_PATH_NAME_MAX]; /* out */
248 struct btrfs_ioctl_fs_info_args {
249 uint64_t max_id; /* out */
250 uint64_t num_devices; /* out */
251 uint8_t fsid[BTRFS_FSID_SIZE]; /* out */
252 uint64_t reserved[124]; /* pad to 1k */
256 #ifndef BTRFS_IOC_DEFRAG
257 #define BTRFS_IOC_DEFRAG _IOW(BTRFS_IOCTL_MAGIC, 2, \
258 struct btrfs_ioctl_vol_args)
261 #ifndef BTRFS_IOC_DEV_INFO
262 #define BTRFS_IOC_DEV_INFO _IOWR(BTRFS_IOCTL_MAGIC, 30, \
263 struct btrfs_ioctl_dev_info_args)
266 #ifndef BTRFS_IOC_FS_INFO
267 #define BTRFS_IOC_FS_INFO _IOR(BTRFS_IOCTL_MAGIC, 31, \
268 struct btrfs_ioctl_fs_info_args)
271 #ifndef BTRFS_IOC_DEVICES_READY
272 #define BTRFS_IOC_DEVICES_READY _IOR(BTRFS_IOCTL_MAGIC, 39, \
273 struct btrfs_ioctl_vol_args)
276 #ifndef BTRFS_FIRST_FREE_OBJECTID
277 #define BTRFS_FIRST_FREE_OBJECTID 256
280 #ifndef BTRFS_ROOT_TREE_OBJECTID
281 #define BTRFS_ROOT_TREE_OBJECTID 1
284 #ifndef BTRFS_QUOTA_TREE_OBJECTID
285 #define BTRFS_QUOTA_TREE_OBJECTID 8ULL
288 #ifndef BTRFS_ROOT_ITEM_KEY
289 #define BTRFS_ROOT_ITEM_KEY 132
292 #ifndef BTRFS_QGROUP_STATUS_KEY
293 #define BTRFS_QGROUP_STATUS_KEY 240
296 #ifndef BTRFS_QGROUP_INFO_KEY
297 #define BTRFS_QGROUP_INFO_KEY 242
300 #ifndef BTRFS_QGROUP_LIMIT_KEY
301 #define BTRFS_QGROUP_LIMIT_KEY 244
304 #ifndef BTRFS_SUPER_MAGIC
305 #define BTRFS_SUPER_MAGIC 0x9123683E
313 #define MS_PRIVATE (1 << 18)
316 #if !HAVE_DECL_GETTID
317 static inline pid_t gettid(void) {
318 return (pid_t) syscall(SYS_gettid);
323 #define SCM_SECURITY 0x03
326 #ifndef MS_STRICTATIME
327 #define MS_STRICTATIME (1<<24)
335 #define MS_SHARED (1<<20)
338 #ifndef PR_SET_NO_NEW_PRIVS
339 #define PR_SET_NO_NEW_PRIVS 38
342 #ifndef PR_SET_CHILD_SUBREAPER
343 #define PR_SET_CHILD_SUBREAPER 36
346 #ifndef MAX_HANDLE_SZ
347 #define MAX_HANDLE_SZ 128
350 #ifndef __NR_name_to_handle_at
351 # if defined(__x86_64__)
352 # define __NR_name_to_handle_at 303
353 # elif defined(__i386__)
354 # define __NR_name_to_handle_at 341
355 # elif defined(__arm__)
356 # define __NR_name_to_handle_at 370
357 # elif defined(__powerpc__)
358 # define __NR_name_to_handle_at 345
360 # error "__NR_name_to_handle_at is not defined"
364 #if !HAVE_DECL_NAME_TO_HANDLE_AT
366 unsigned int handle_bytes;
368 unsigned char f_handle[0];
371 static inline int name_to_handle_at(int fd, const char *name, struct file_handle *handle, int *mnt_id, int flags) {
372 return syscall(__NR_name_to_handle_at, fd, name, handle, mnt_id, flags);
376 #ifndef HAVE_SECURE_GETENV
377 # ifdef HAVE___SECURE_GETENV
378 # define secure_getenv __secure_getenv
380 # error "neither secure_getenv nor __secure_getenv are available"
384 #ifndef CIFS_MAGIC_NUMBER
385 # define CIFS_MAGIC_NUMBER 0xFF534D42
388 #ifndef TFD_TIMER_CANCEL_ON_SET
389 # define TFD_TIMER_CANCEL_ON_SET (1 << 1)
393 # define SO_REUSEPORT 15
397 # define EVIOCREVOKE _IOW('E', 0x91, int)
400 #ifndef DRM_IOCTL_SET_MASTER
401 # define DRM_IOCTL_SET_MASTER _IO('d', 0x1e)
404 #ifndef DRM_IOCTL_DROP_MASTER
405 # define DRM_IOCTL_DROP_MASTER _IO('d', 0x1f)
408 #if defined(__i386__) || defined(__x86_64__)
410 /* The precise definition of __O_TMPFILE is arch specific, so let's
411 * just define this on x86 where we know the value. */
414 #define __O_TMPFILE 020000000
417 /* a horrid kludge trying to make sure that this will fail on old kernels */
419 #define O_TMPFILE (__O_TMPFILE | O_DIRECTORY)
425 # if defined(__x86_64__)
426 # define __NR_setns 308
427 # elif defined(__i386__)
428 # define __NR_setns 346
430 # error "__NR_setns is not defined"
435 static inline int setns(int fd, int nstype) {
436 return syscall(__NR_setns, fd, nstype);
440 #if !HAVE_DECL_LO_FLAGS_PARTSCAN
441 #define LO_FLAGS_PARTSCAN 8
444 #ifndef LOOP_CTL_REMOVE
445 #define LOOP_CTL_REMOVE 0x4C81
448 #ifndef LOOP_CTL_GET_FREE
449 #define LOOP_CTL_GET_FREE 0x4C82
452 #if !HAVE_DECL_IFLA_INET6_ADDR_GEN_MODE
453 #define IFLA_INET6_UNSPEC 0
454 #define IFLA_INET6_FLAGS 1
455 #define IFLA_INET6_CONF 2
456 #define IFLA_INET6_STATS 3
457 #define IFLA_INET6_MCAST 4
458 #define IFLA_INET6_CACHEINFO 5
459 #define IFLA_INET6_ICMP6STATS 6
460 #define IFLA_INET6_TOKEN 7
461 #define IFLA_INET6_ADDR_GEN_MODE 8
462 #define __IFLA_INET6_MAX 9
464 #define IFLA_INET6_MAX (__IFLA_INET6_MAX - 1)
466 #define IN6_ADDR_GEN_MODE_EUI64 0
467 #define IN6_ADDR_GEN_MODE_NONE 1
470 #if !HAVE_DECL_IFLA_MACVLAN_FLAGS
471 #define IFLA_MACVLAN_UNSPEC 0
472 #define IFLA_MACVLAN_MODE 1
473 #define IFLA_MACVLAN_FLAGS 2
474 #define __IFLA_MACVLAN_MAX 3
476 #define IFLA_MACVLAN_MAX (__IFLA_MACVLAN_MAX - 1)
479 #if !HAVE_DECL_IFLA_IPVLAN_MODE
480 #define IFLA_IPVLAN_UNSPEC 0
481 #define IFLA_IPVLAN_MODE 1
482 #define __IFLA_IPVLAN_MAX 2
484 #define IFLA_IPVLAN_MAX (__IFLA_IPVLAN_MAX - 1)
486 #define IPVLAN_MODE_L2 0
487 #define IPVLAN_MODE_L3 1
491 #if !HAVE_DECL_IFLA_VTI_REMOTE
492 #define IFLA_VTI_UNSPEC 0
493 #define IFLA_VTI_LINK 1
494 #define IFLA_VTI_IKEY 2
495 #define IFLA_VTI_OKEY 3
496 #define IFLA_VTI_LOCAL 4
497 #define IFLA_VTI_REMOTE 5
498 #define __IFLA_VTI_MAX 6
500 #define IFLA_VTI_MAX (__IFLA_VTI_MAX - 1)
503 #if !HAVE_DECL_IFLA_PHYS_PORT_ID
504 #undef IFLA_PROMISCUITY
505 #define IFLA_PROMISCUITY 30
506 #define IFLA_NUM_TX_QUEUES 31
507 #define IFLA_NUM_RX_QUEUES 32
508 #define IFLA_CARRIER 33
509 #define IFLA_PHYS_PORT_ID 34
510 #define __IFLA_MAX 35
512 #define IFLA_MAX (__IFLA_MAX - 1)
515 #if !HAVE_DECL_IFLA_BOND_AD_INFO
516 #define IFLA_BOND_UNSPEC 0
517 #define IFLA_BOND_MODE 1
518 #define IFLA_BOND_ACTIVE_SLAVE 2
519 #define IFLA_BOND_MIIMON 3
520 #define IFLA_BOND_UPDELAY 4
521 #define IFLA_BOND_DOWNDELAY 5
522 #define IFLA_BOND_USE_CARRIER 6
523 #define IFLA_BOND_ARP_INTERVAL 7
524 #define IFLA_BOND_ARP_IP_TARGET 8
525 #define IFLA_BOND_ARP_VALIDATE 9
526 #define IFLA_BOND_ARP_ALL_TARGETS 10
527 #define IFLA_BOND_PRIMARY 11
528 #define IFLA_BOND_PRIMARY_RESELECT 12
529 #define IFLA_BOND_FAIL_OVER_MAC 13
530 #define IFLA_BOND_XMIT_HASH_POLICY 14
531 #define IFLA_BOND_RESEND_IGMP 15
532 #define IFLA_BOND_NUM_PEER_NOTIF 16
533 #define IFLA_BOND_ALL_SLAVES_ACTIVE 17
534 #define IFLA_BOND_MIN_LINKS 18
535 #define IFLA_BOND_LP_INTERVAL 19
536 #define IFLA_BOND_PACKETS_PER_SLAVE 20
537 #define IFLA_BOND_AD_LACP_RATE 21
538 #define IFLA_BOND_AD_SELECT 22
539 #define IFLA_BOND_AD_INFO 23
540 #define __IFLA_BOND_MAX 24
542 #define IFLA_BOND_MAX (__IFLA_BOND_MAX - 1)
545 #if !HAVE_DECL_IFLA_VLAN_PROTOCOL
546 #define IFLA_VLAN_UNSPEC 0
547 #define IFLA_VLAN_ID 1
548 #define IFLA_VLAN_FLAGS 2
549 #define IFLA_VLAN_EGRESS_QOS 3
550 #define IFLA_VLAN_INGRESS_QOS 4
551 #define IFLA_VLAN_PROTOCOL 5
552 #define __IFLA_VLAN_MAX 6
554 #define IFLA_VLAN_MAX (__IFLA_VLAN_MAX - 1)
557 #if !HAVE_DECL_IFLA_VXLAN_LOCAL6
558 #define IFLA_VXLAN_UNSPEC 0
559 #define IFLA_VXLAN_ID 1
560 #define IFLA_VXLAN_GROUP 2
561 #define IFLA_VXLAN_LINK 3
562 #define IFLA_VXLAN_LOCAL 4
563 #define IFLA_VXLAN_TTL 5
564 #define IFLA_VXLAN_TOS 6
565 #define IFLA_VXLAN_LEARNING 7
566 #define IFLA_VXLAN_AGEING 8
567 #define IFLA_VXLAN_LIMIT 9
568 #define IFLA_VXLAN_PORT_RANGE 10
569 #define IFLA_VXLAN_PROXY 11
570 #define IFLA_VXLAN_RSC 12
571 #define IFLA_VXLAN_L2MISS 13
572 #define IFLA_VXLAN_L3MISS 14
573 #define IFLA_VXLAN_PORT 15
574 #define IFLA_VXLAN_GROUP6 16
575 #define IFLA_VXLAN_LOCAL6 17
576 #define __IFLA_VXLAN_MAX 18
578 #define IFLA_VXLAN_MAX (__IFLA_VXLAN_MAX - 1)
581 #if !HAVE_DECL_IFLA_IPTUN_6RD_RELAY_PREFIXLEN
582 #define IFLA_IPTUN_UNSPEC 0
583 #define IFLA_IPTUN_LINK 1
584 #define IFLA_IPTUN_LOCAL 2
585 #define IFLA_IPTUN_REMOTE 3
586 #define IFLA_IPTUN_TTL 4
587 #define IFLA_IPTUN_TOS 5
588 #define IFLA_IPTUN_ENCAP_LIMIT 6
589 #define IFLA_IPTUN_FLOWINFO 7
590 #define IFLA_IPTUN_FLAGS 8
591 #define IFLA_IPTUN_PROTO 9
592 #define IFLA_IPTUN_PMTUDISC 10
593 #define IFLA_IPTUN_6RD_PREFIX 11
594 #define IFLA_IPTUN_6RD_RELAY_PREFIX 12
595 #define IFLA_IPTUN_6RD_PREFIXLEN 13
596 #define IFLA_IPTUN_6RD_RELAY_PREFIXLEN 14
597 #define __IFLA_IPTUN_MAX 15
599 #define IFLA_IPTUN_MAX (__IFLA_IPTUN_MAX - 1)
602 #if !HAVE_DECL_IFLA_BRIDGE_VLAN_INFO
603 #define IFLA_BRIDGE_FLAGS 0
604 #define IFLA_BRIDGE_MODE 1
605 #define IFLA_BRIDGE_VLAN_INFO 2
606 #define __IFLA_BRIDGE_MAX 3
608 #define IFLA_BRIDGE_MAX (__IFLA_BRIDGE_MAX - 1)
611 #if !HAVE_DECL_IFLA_BRPORT_UNICAST_FLOOD
612 #define IFLA_BRPORT_UNSPEC 0
613 #define IFLA_BRPORT_STATE 1
614 #define IFLA_BRPORT_PRIORITY 2
615 #define IFLA_BRPORT_COST 3
616 #define IFLA_BRPORT_MODE 4
617 #define IFLA_BRPORT_GUARD 5
618 #define IFLA_BRPORT_PROTECT 6
619 #define IFLA_BRPORT_FAST_LEAVE 7
620 #define IFLA_BRPORT_LEARNING 8
621 #define IFLA_BRPORT_UNICAST_FLOOD 9
622 #define __IFLA_BRPORT_MAX 10
624 #define IFLA_BRPORT_MAX (__IFLA_BRPORT_MAX - 1)
627 #if !HAVE_DECL_NDA_IFINDEX
631 #define NDA_CACHEINFO 3
636 #define NDA_IFINDEX 8
639 #define NDA_MAX (__NDA_MAX - 1)
642 #ifndef IPV6_UNICAST_IF
643 #define IPV6_UNICAST_IF 76
646 #ifndef IFF_MULTI_QUEUE
647 #define IFF_MULTI_QUEUE 0x100
651 #define IFF_LOWER_UP 0x10000
655 #define IFF_DORMANT 0x20000
658 #ifndef BOND_XMIT_POLICY_ENCAP23
659 #define BOND_XMIT_POLICY_ENCAP23 3
662 #ifndef BOND_XMIT_POLICY_ENCAP34
663 #define BOND_XMIT_POLICY_ENCAP34 4
666 #ifndef NET_ADDR_RANDOM
667 # define NET_ADDR_RANDOM 1
670 #ifndef NET_NAME_UNKNOWN
671 # define NET_NAME_UNKNOWN 0
674 #ifndef NET_NAME_ENUM
675 # define NET_NAME_ENUM 1
678 #ifndef NET_NAME_PREDICTABLE
679 # define NET_NAME_PREDICTABLE 2
682 #ifndef NET_NAME_USER
683 # define NET_NAME_USER 3
686 #ifndef NET_NAME_RENAMED
687 # define NET_NAME_RENAMED 4
691 # define BPF_XOR 0xa0
694 /* Note that LOOPBACK_IFINDEX is currently not exported by the
695 * kernel/glibc, but hardcoded internally by the kernel. However, as
696 * it is exported to userspace indirectly via rtnetlink and the
697 * ioctls, and made use of widely we define it here too, in a way that
698 * is compatible with the kernel's internal definition. */
699 #ifndef LOOPBACK_IFINDEX
700 #define LOOPBACK_IFINDEX 1
703 #ifndef MAX_AUDIT_MESSAGE_LENGTH
704 #define MAX_AUDIT_MESSAGE_LENGTH 8970
707 #ifndef AUDIT_NLGRP_MAX
708 #define AUDIT_NLGRP_READLOG 1
711 #ifndef CAP_MAC_OVERRIDE
712 #define CAP_MAC_OVERRIDE 32
715 #ifndef CAP_MAC_ADMIN
716 #define CAP_MAC_ADMIN 33
720 #define CAP_SYSLOG 34
723 #ifndef CAP_WAKE_ALARM
724 #define CAP_WAKE_ALARM 35
727 #ifndef CAP_BLOCK_SUSPEND
728 #define CAP_BLOCK_SUSPEND 36
731 #ifndef CAP_AUDIT_READ
732 #define CAP_AUDIT_READ 37
735 static inline int raw_clone(unsigned long flags, void *child_stack) {
736 #if defined(__s390__) || defined(__CRIS__)
737 /* On s390 and cris the order of the first and second arguments
738 * of the raw clone() system call is reversed. */
739 return (int) syscall(__NR_clone, child_stack, flags);
741 return (int) syscall(__NR_clone, flags, child_stack);
745 static inline pid_t raw_getpid(void) {
746 return (pid_t) syscall(__NR_getpid);
749 #if !HAVE_DECL_RENAMEAT2
751 #ifndef __NR_renameat2
752 # if defined __x86_64__
753 # define __NR_renameat2 316
754 # elif defined __arm__
755 # define __NR_renameat2 382
756 # elif defined _MIPS_SIM
757 # if _MIPS_SIM == _MIPS_SIM_ABI32
758 # define __NR_renameat2 4351
760 # if _MIPS_SIM == _MIPS_SIM_NABI32
761 # define __NR_renameat2 6315
763 # if _MIPS_SIM == _MIPS_SIM_ABI64
764 # define __NR_renameat2 5311
766 # elif defined __i386__
767 # define __NR_renameat2 353
769 # warning "__NR_renameat2 unknown for your architecture"
770 # define __NR_renameat2 0xffffffff
774 static inline int renameat2(int oldfd, const char *oldname, int newfd, const char *newname, unsigned flags) {
775 return syscall(__NR_renameat2, oldfd, oldname, newfd, newname, flags);
779 #ifndef RENAME_NOREPLACE
780 #define RENAME_NOREPLACE (1 << 0)
784 static inline int kcmp(pid_t pid1, pid_t pid2, int type, unsigned long idx1, unsigned long idx2) {
785 return syscall(__NR_kcmp, pid1, pid2, type, idx1, idx2);