351 lines
9.6 KiB
C
351 lines
9.6 KiB
C
#pragma once
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/***
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This file is part of systemd.
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Copyright 2010 Lennart Poettering
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Copyright 2016 Zbigniew Jędrzejewski-Szmek
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systemd is free software; you can redistribute it and/or modify it
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under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation; either version 2.1 of the License, or
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(at your option) any later version.
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systemd is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with systemd; If not, see <http://www.gnu.org/licenses/>.
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***/
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/* Missing glibc definitions to access certain kernel APIs */
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#include <sys/types.h>
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#if !HAVE_DECL_PIVOT_ROOT
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static inline int pivot_root(const char *new_root, const char *put_old) {
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return syscall(SYS_pivot_root, new_root, put_old);
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}
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#endif
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/* ======================================================================= */
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#if !HAVE_DECL_MEMFD_CREATE
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# ifndef __NR_memfd_create
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# if defined __x86_64__
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# define __NR_memfd_create 319
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# elif defined __arm__
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# define __NR_memfd_create 385
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# elif defined __aarch64__
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# define __NR_memfd_create 279
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# elif defined __s390__
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# define __NR_memfd_create 350
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# elif defined _MIPS_SIM
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# if _MIPS_SIM == _MIPS_SIM_ABI32
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# define __NR_memfd_create 4354
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# endif
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# if _MIPS_SIM == _MIPS_SIM_NABI32
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# define __NR_memfd_create 6318
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# endif
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# if _MIPS_SIM == _MIPS_SIM_ABI64
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# define __NR_memfd_create 5314
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# endif
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# elif defined __i386__
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# define __NR_memfd_create 356
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# elif defined __arc__
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# define __NR_memfd_create 279
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# else
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# warning "__NR_memfd_create unknown for your architecture"
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# endif
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# endif
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static inline int memfd_create(const char *name, unsigned int flags) {
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# ifdef __NR_memfd_create
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return syscall(__NR_memfd_create, name, flags);
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# else
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errno = ENOSYS;
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return -1;
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# endif
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}
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#endif
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/* ======================================================================= */
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#if !HAVE_DECL_GETRANDOM
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# ifndef __NR_getrandom
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# if defined __x86_64__
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# define __NR_getrandom 318
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# elif defined(__i386__)
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# define __NR_getrandom 355
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# elif defined(__arm__)
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# define __NR_getrandom 384
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# elif defined(__aarch64__)
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# define __NR_getrandom 278
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# elif defined(__ia64__)
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# define __NR_getrandom 1339
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# elif defined(__m68k__)
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# define __NR_getrandom 352
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# elif defined(__s390x__)
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# define __NR_getrandom 349
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# elif defined(__powerpc__)
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# define __NR_getrandom 359
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# elif defined _MIPS_SIM
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# if _MIPS_SIM == _MIPS_SIM_ABI32
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# define __NR_getrandom 4353
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# endif
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# if _MIPS_SIM == _MIPS_SIM_NABI32
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# define __NR_getrandom 6317
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# endif
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# if _MIPS_SIM == _MIPS_SIM_ABI64
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# define __NR_getrandom 5313
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# endif
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# elif defined(__arc__)
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# define __NR_getrandom 278
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# else
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# warning "__NR_getrandom unknown for your architecture"
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# endif
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# endif
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static inline int getrandom(void *buffer, size_t count, unsigned flags) {
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# ifdef __NR_getrandom
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return syscall(__NR_getrandom, buffer, count, flags);
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# else
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errno = ENOSYS;
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return -1;
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# endif
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}
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#endif
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/* ======================================================================= */
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#if !HAVE_DECL_GETTID
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static inline pid_t gettid(void) {
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return (pid_t) syscall(SYS_gettid);
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}
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#endif
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/* ======================================================================= */
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#if !HAVE_DECL_NAME_TO_HANDLE_AT
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# ifndef __NR_name_to_handle_at
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# if defined(__x86_64__)
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# define __NR_name_to_handle_at 303
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# elif defined(__i386__)
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# define __NR_name_to_handle_at 341
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# elif defined(__arm__)
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# define __NR_name_to_handle_at 370
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# elif defined(__powerpc__)
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# define __NR_name_to_handle_at 345
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# elif defined(__arc__)
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# define __NR_name_to_handle_at 264
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# else
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# error "__NR_name_to_handle_at is not defined"
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# endif
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# endif
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struct file_handle {
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unsigned int handle_bytes;
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int handle_type;
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unsigned char f_handle[0];
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};
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static inline int name_to_handle_at(int fd, const char *name, struct file_handle *handle, int *mnt_id, int flags) {
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# ifdef __NR_name_to_handle_at
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return syscall(__NR_name_to_handle_at, fd, name, handle, mnt_id, flags);
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# else
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errno = ENOSYS;
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return -1;
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# endif
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}
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#endif
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/* ======================================================================= */
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#if !HAVE_DECL_SETNS
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# ifndef __NR_setns
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# if defined(__x86_64__)
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# define __NR_setns 308
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# elif defined(__i386__)
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# define __NR_setns 346
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# elif defined(__arc__)
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# define __NR_setns 268
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# else
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# error "__NR_setns is not defined"
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# endif
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# endif
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static inline int setns(int fd, int nstype) {
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# ifdef __NR_setns
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return syscall(__NR_setns, fd, nstype);
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# else
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errno = ENOSYS;
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return -1;
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# endif
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}
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#endif
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/* ======================================================================= */
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static inline pid_t raw_getpid(void) {
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#if defined(__alpha__)
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return (pid_t) syscall(__NR_getxpid);
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#else
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return (pid_t) syscall(__NR_getpid);
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#endif
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}
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/* ======================================================================= */
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#if !HAVE_DECL_RENAMEAT2
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# ifndef __NR_renameat2
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# if defined __x86_64__
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# define __NR_renameat2 316
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# elif defined __arm__
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# define __NR_renameat2 382
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# elif defined __aarch64__
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# define __NR_renameat2 276
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# elif defined _MIPS_SIM
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# if _MIPS_SIM == _MIPS_SIM_ABI32
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# define __NR_renameat2 4351
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# endif
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# if _MIPS_SIM == _MIPS_SIM_NABI32
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# define __NR_renameat2 6315
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# endif
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# if _MIPS_SIM == _MIPS_SIM_ABI64
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# define __NR_renameat2 5311
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# endif
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# elif defined __i386__
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# define __NR_renameat2 353
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# elif defined __powerpc64__
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# define __NR_renameat2 357
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# elif defined __s390__ || defined __s390x__
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# define __NR_renameat2 347
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# elif defined __arc__
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# define __NR_renameat2 276
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# else
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# warning "__NR_renameat2 unknown for your architecture"
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# endif
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# endif
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static inline int renameat2(int oldfd, const char *oldname, int newfd, const char *newname, unsigned flags) {
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# ifdef __NR_renameat2
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return syscall(__NR_renameat2, oldfd, oldname, newfd, newname, flags);
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# else
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errno = ENOSYS;
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return -1;
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# endif
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}
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#endif
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/* ======================================================================= */
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#if !HAVE_DECL_KCMP
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static inline int kcmp(pid_t pid1, pid_t pid2, int type, unsigned long idx1, unsigned long idx2) {
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# ifdef __NR_kcmp
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return syscall(__NR_kcmp, pid1, pid2, type, idx1, idx2);
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# else
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errno = ENOSYS;
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return -1;
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# endif
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}
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#endif
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/* ======================================================================= */
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#if !HAVE_DECL_KEYCTL
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static inline long keyctl(int cmd, unsigned long arg2, unsigned long arg3, unsigned long arg4,unsigned long arg5) {
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# ifdef __NR_keyctl
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return syscall(__NR_keyctl, cmd, arg2, arg3, arg4, arg5);
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# else
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errno = ENOSYS;
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return -1;
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# endif
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}
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static inline key_serial_t add_key(const char *type, const char *description, const void *payload, size_t plen, key_serial_t ringid) {
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# ifdef __NR_add_key
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return syscall(__NR_add_key, type, description, payload, plen, ringid);
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# else
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errno = ENOSYS;
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return -1;
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# endif
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}
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static inline key_serial_t request_key(const char *type, const char *description, const char * callout_info, key_serial_t destringid) {
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# ifdef __NR_request_key
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return syscall(__NR_request_key, type, description, callout_info, destringid);
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# else
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errno = ENOSYS;
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return -1;
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# endif
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}
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#endif
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/* ======================================================================= */
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#if !HAVE_DECL_COPY_FILE_RANGE
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# ifndef __NR_copy_file_range
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# if defined(__x86_64__)
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# define __NR_copy_file_range 326
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# elif defined(__i386__)
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# define __NR_copy_file_range 377
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# elif defined __s390__
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# define __NR_copy_file_range 375
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# elif defined __arm__
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# define __NR_copy_file_range 391
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# elif defined __aarch64__
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# define __NR_copy_file_range 285
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# elif defined __powerpc__
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# define __NR_copy_file_range 379
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# elif defined __arc__
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# define __NR_copy_file_range 285
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# else
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# warning "__NR_copy_file_range not defined for your architecture"
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# endif
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# endif
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static inline ssize_t copy_file_range(int fd_in, loff_t *off_in,
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int fd_out, loff_t *off_out,
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size_t len,
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unsigned int flags) {
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# ifdef __NR_copy_file_range
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return syscall(__NR_copy_file_range, fd_in, off_in, fd_out, off_out, len, flags);
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# else
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errno = ENOSYS;
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return -1;
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# endif
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}
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#endif
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#if !HAVE_DECL_BPF
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# ifndef __NR_bpf
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# if defined __i386__
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# define __NR_bpf 357
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# elif defined __x86_64__
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# define __NR_bpf 321
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# elif defined __aarch64__
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# define __NR_bpf 280
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# elif defined __sparc__
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# define __NR_bpf 349
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# elif defined __s390__
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# define __NR_bpf 351
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# else
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# warning "__NR_bpf not defined for your architecture"
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# endif
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# endif
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union bpf_attr;
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static inline int bpf(int cmd, union bpf_attr *attr, size_t size) {
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#ifdef __NR_bpf
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return (int) syscall(__NR_bpf, cmd, attr, size);
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#else
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errno = ENOSYS;
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return -1;
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#endif
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}
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#endif
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