syscalls(2) System Calls Manual syscalls(2) syscalls - . . glibc ( ). intro(2). . glibc chdir() "chdir" . glibc errno . ( syscall(2) ). : / syscall(2) ( ) errno -1 . . ( ) truncate(2) truncate64(2) glibc truncate() . . 2.2 . : o 1.0 . o "1.2" 1.1.x 1.2. ( 1.2 1.0.6 1.1.x ). o "2.0" 1.3.x 2.0. ( 2.0 1.2.x 1.2.10 1.3.x ). o "2.2" 2.1.x 2.2.0. ( 2.2 2.0.21 2.1.x ). o "2.4" 2.3.x 2.4.0. ( 2.4 2.2.8 2.3.x ). o "2.6" 2.5.x 2.6.0. ( 2.6 2.4.15 2.5.x ). o 2.6.0 2.6.x. . 3.x 2.6.39 4.x 3.19 5.x 4.20 6.x 5.19. o (backported) . 2.6.x 2.4.x 2.4.15. . 5.14 ( ) : ----------------------------------------------------------------------- _llseek(2) 1.2 _newselect(2) 2.0 _sysctl(2) 2.0 5.5 accept(2) 2.0 socketcall(2) accept4(2) 2.6.28 access(2) 1.0 acct(2) 1.0 add_key(2) 2.6.10 adjtimex(2) 1.0 alarm(2) 1.0 alloc_hugepages(2) 2.5.36 2.5.44 arc_gettls(2) 3.9 ARC arc_settls(2) 3.9 ARC arc_usr_cmpxchg(2) 4.9 ARC arch_prctl(2) 2.6 x86_64 x86 4.12 atomic_barrier(2) 2.6.34 m68k atomic_cmpxchg_32(2) 2.6.34 m68k bdflush(2) 1.2 ( ) 2.6 5.15 bind(2) 2.0 socketcall(2) bpf(2) 3.18 brk(2) 1.0 breakpoint(2) 2.2 ARM OABI __ARM_NR cacheflush(2) 1.2 x86 capget(2) 2.2 capset(2) 2.2 chdir(2) 1.0 chmod(2) 1.0 chown(2) 2.2 chown(2) chown32(2) 2.4 chroot(2) 1.0 clock_adjtime(2) 2.6.39 clock_getres(2) 2.6 clock_gettime(2) 2.6 clock_nanosleep(2) 2.6 clock_settime(2) 2.6 clone2(2) 2.4 IA-64 clone(2) 1.0 clone3(2) 5.3 close(2) 1.0 close_range(2) 5.9 connect(2) 2.0 socketcall(2) copy_file_range(2) 4.5 creat(2) 1.0 create_module(2) 1.0 2.6 delete_module(2) 1.0 dup(2) 1.0 dup2(2) 1.0 dup3(2) 2.6.27 epoll_create(2) 2.6 epoll_create1(2) 2.6.27 epoll_ctl(2) 2.6 epoll_pwait(2) 2.6.19 epoll_pwait2(2) 5.11 epoll_wait(2) 2.6 eventfd(2) 2.6.22 eventfd2(2) 2.6.27 execv(2) 2.0 SPARC/SPARC64 SunOS execve(2) 1.0 execveat(2) 3.19 exit(2) 1.0 exit_group(2) 2.6 faccessat(2) 2.6.16 faccessat2(2) 5.8 fadvise64(2) 2.6 fadvise64_64(2) 2.6 fallocate(2) 2.6.23 fanotify_init(2) 2.6.37 fanotify_mark(2) 2.6.37 fchdir(2) 1.0 fchmod(2) 1.0 fchmodat(2) 2.6.16 fchown(2) 1.0 fchown32(2) 2.4 fchownat(2) 2.6.16 fcntl(2) 1.0 fcntl64(2) 2.4 fdatasync(2) 2.0 fgetxattr(2) 2.6; 2.4.18 finit_module(2) 3.8 flistxattr(2) 2.6; 2.4.18 flock(2) 2.0 fork(2) 1.0 free_hugepages(2) 2.5.36 2.5.44 fremovexattr(2) 2.6; 2.4.18 fsconfig(2) 5.2 fsetxattr(2) 2.6; 2.4.18 fsmount(2) 5.2 fsopen(2) 5.2 fspick(2) 5.2 fstat(2) 1.0 fstat64(2) 2.4 fstatat64(2) 2.6.16 fstatfs(2) 1.0 fstatfs64(2) 2.6 fsync(2) 1.0 ftruncate(2) 1.0 ftruncate64(2) 2.4 futex(2) 2.6 futimesat(2) 2.6.16 get_kernel_syms(2) 1.0 2.6 get_mempolicy(2) 2.6.6 get_robust_list(2) 2.6.17 get_thread_area(2) 2.6 get_tls(2) 4.15 ARM OABI __ARM_NR getcpu(2) 2.6.19 getcwd(2) 2.2 getdents(2) 2.0 getdents64(2) 2.4 getdomainname(2) 2.2 SPARC SPARC64 osf_getdomainname(2) Alpha 2.0 getdtablesize(2) 2.0 SPARC ( 2.6.26) Alpha osf_getdtablesize(2) getegid(2) 1.0 getegid32(2) 2.4 geteuid(2) 1.0 geteuid32(2) 2.4 getgid(2) 1.0 getgid32(2) 2.4 getgroups(2) 1.0 getgroups32(2) 2.4 gethostname(2) 2.0 Alpha SPARC 2.6.26 getitimer(2) 1.0 getpeername(2) 2.0 socketcall(2) getpagesize(2) 2.0 Alpha SPARC/SPARC64 getpgid(2) 1.0 getpgrp(2) 1.0 getpid(2) 1.0 getppid(2) 1.0 getpriority(2) 1.0 getrandom(2) 3.17 getresgid(2) 2.2 getresgid32(2) 2.4 getresuid(2) 2.2 getresuid32(2) 2.4 getrlimit(2) 1.0 getrusage(2) 1.0 getsid(2) 2.0 getsockname(2) 2.0 socketcall(2) getsockopt(2) 2.0 socketcall(2) gettid(2) 2.4.11 gettimeofday(2) 1.0 getuid(2) 1.0 getuid32(2) 2.4 getunwind(2) 2.4.8 IA-64 getxattr(2) 2.6; 2.4.18 getxgid(2) 2.0 Alpha (NOTES) getxpid(2) 2.0 Alpha (NOTES) getxuid(2) 2.0 Alpha (NOTES) init_module(2) 1.0 inotify_add_watch(2) 2.6.13 inotify_init(2) 2.6.13 inotify_init1(2) 2.6.27 inotify_rm_watch(2) 2.6.13 io_cancel(2) 2.6 io_destroy(2) 2.6 io_getevents(2) 2.6 io_pgetevents(2) 4.18 io_setup(2) 2.6 io_submit(2) 2.6 io_uring_enter(2) 5.1 io_uring_register(2) 5.1 io_uring_setup(2) 5.1 ioctl(2) 1.0 ioperm(2) 1.0 iopl(2) 1.0 ioprio_get(2) 2.6.13 ioprio_set(2) 2.6.13 ipc(2) 1.0 kcmp(2) 3.5 kern_features(2) 3.7 SPARC64 kexec_file_load(2) 3.17 kexec_load(2) 2.6.13 keyctl(2) 2.6.10 kill(2) 1.0 landlock_add_rule(2) 5.13 landlock_create_ruleset(2) 5.13 landlock_restrict_self(2) 5.13 lchown(2) 1.0 chown(2) lchown32(2) 2.4 lgetxattr(2) 2.6; 2.4.18 link(2) 1.0 linkat(2) 2.6.16 listen(2) 2.0 socketcall(2) listxattr(2) 2.6; 2.4.18 llistxattr(2) 2.6; 2.4.18 lookup_dcookie(2) 2.6 lremovexattr(2) 2.6; 2.4.18 lseek(2) 1.0 lsetxattr(2) 2.6; 2.4.18 lstat(2) 1.0 lstat64(2) 2.4 madvise(2) 2.4 mbind(2) 2.6.6 memory_ordering(2) 2.2 SPARC64 membarrier(2) 3.17 memfd_create(2) 3.17 memfd_secret(2) 5.14 migrate_pages(2) 2.6.16 mincore(2) 2.4 mkdir(2) 1.0 mkdirat(2) 2.6.16 mknod(2) 1.0 mknodat(2) 2.6.16 mlock(2) 2.0 mlock2(2) 4.4 mlockall(2) 2.0 mmap(2) 1.0 mmap2(2) 2.4 modify_ldt(2) 1.0 mount(2) 1.0 move_mount(2) 5.2 move_pages(2) 2.6.18 mprotect(2) 1.0 mq_getsetattr(2) 2.6.6 mq_notify(2) 2.6.6 mq_open(2) 2.6.6 mq_timedreceive(2) 2.6.6 mq_timedsend(2) 2.6.6 mq_unlink(2) 2.6.6 mremap(2) 2.0 msgctl(2) 2.0 ipc(2) msgget(2) 2.0 ipc(2) msgrcv(2) 2.0 ipc(2) msgsnd(2) 2.0 ipc(2) msync(2) 2.0 munlock(2) 2.0 munlockall(2) 2.0 munmap(2) 1.0 name_to_handle_at(2) 2.6.39 nanosleep(2) 2.0 newfstatat(2) 2.6.16 stat(2) nfsservctl(2) 2.2 3.1 nice(2) 1.0 old_adjtimex(2) 2.0 Alpha (NOTES) old_getrlimit(2) 2.4 getrlimit(2) RLIM_INFINITY oldfstat(2) 1.0 oldlstat(2) 1.0 oldolduname(2) 1.0 oldstat(2) 1.0 oldumount(2) 2.4.116 umount(2) Alpha olduname(2) 1.0 open(2) 1.0 open_by_handle_at(2) 2.6.39 open_tree(2) 5.2 openat(2) 2.6.16 openat2(2) 5.6 or1k_atomic(2) 3.1 OpenRISC 1000 pause(2) 1.0 pciconfig_iobase(2) 2.2.15; 2.4 x86 pciconfig_read(2) 2.0.26; 2.2 x86 pciconfig_write(2) 2.0.26; 2.2 x86 perf_event_open(2) 2.6.31 perf_counter_open() 2.6.31 2.6.32 personality(2) 1.2 perfctr(2) 2.2 SPARC 2.6.34 perfmonctl(2) 2.4 IA-64 5.10 pidfd_getfd(2) 5.6 pidfd_send_signal(2) 5.1 pidfd_open(2) 5.3 pipe(2) 1.0 pipe2(2) 2.6.27 pivot_root(2) 2.4 pkey_alloc(2) 4.8 pkey_free(2) 4.8 pkey_mprotect(2) 4.8 poll(2) 2.0.36; 2.2 ppoll(2) 2.6.16 prctl(2) 2.2 pread64(2) "pread" 2.2 "pread64" 2.6 preadv(2) 2.6.30 preadv2(2) 4.6 prlimit64(2) 2.6.36 process_madvise(2) 5.10 process_vm_readv(2) 3.2 process_vm_writev(2) 3.2 pselect6(2) 2.6.16 ptrace(2) 1.0 pwrite64(2) "pwrite" 2.2 "pwrite64" 2.6 pwritev(2) 2.6.30 pwritev2(2) 4.6 query_module(2) 2.2 2.6 quotactl(2) 1.0 quotactl_fd(2) 5.14 read(2) 1.0 readahead(2) 2.4.13 readdir(2) 1.0 readlink(2) 1.0 readlinkat(2) 2.6.16 readv(2) 2.0 reboot(2) 1.0 recv(2) 2.0 socketcall(2) recvfrom(2) 2.0 socketcall(2) recvmsg(2) 2.0 socketcall(2) recvmmsg(2) 2.6.33 remap_file_pages(2) 2.6 3.16 removexattr(2) 2.6; 2.4.18 rename(2) 1.0 renameat(2) 2.6.16 renameat2(2) 3.15 request_key(2) 2.6.10 restart_syscall(2) 2.6 riscv_flush_icache(2) 4.15 RISC-V rmdir(2) 1.0 rseq(2) 4.18 rt_sigaction(2) 2.2 rt_sigpending(2) 2.2 rt_sigprocmask(2) 2.2 rt_sigqueueinfo(2) 2.2 rt_sigreturn(2) 2.2 rt_sigsuspend(2) 2.2 rt_sigtimedwait(2) 2.2 rt_tgsigqueueinfo(2) 2.6.31 rtas(2) 2.6.2 PowerPC/PowerPC64 s390_runtime_instr(2) 3.7 s390 s390_pci_mmio_read(2) 3.19 s390 s390_pci_mmio_write(2) 3.19 s390 s390_sthyi(2) 4.15 s390 s390_guarded_storage(2) 4.12 s390 sched_get_affinity(2) 2.6 sched_getaffinity(2) SPARC SPARC64 sched_get_priority_max(2) 2.0 sched_get_priority_min(2) 2.0 sched_getaffinity(2) 2.6 sched_getattr(2) 3.14 sched_getparam(2) 2.0 sched_getscheduler(2) 2.0 sched_rr_get_interval(2) 2.0 sched_set_affinity(2) 2.6 sched_setaffinity(2) SPARC SPARC64 sched_setaffinity(2) 2.6 sched_setattr(2) 3.14 sched_setparam(2) 2.0 sched_setscheduler(2) 2.0 sched_yield(2) 2.0 seccomp(2) 3.17 select(2) 1.0 semctl(2) 2.0 ipc(2) semget(2) 2.0 ipc(2) semop(2) 2.0 ipc(2) semtimedop(2) 2.6; 2.4.22 send(2) 2.0 socketcall(2) sendfile(2) 2.2 sendfile64(2) 2.6; 2.4.19 sendmmsg(2) 3.0 sendmsg(2) 2.0 socketcall(2) sendto(2) 2.0 socketcall(2) set_mempolicy(2) 2.6.6 set_robust_list(2) 2.6.17 set_thread_area(2) 2.6 set_tid_address(2) 2.6 set_tls(2) 2.6.11 ARM OABI/EABI ( __ARM_NR) setdomainname(2) 1.0 setfsgid(2) 1.2 setfsgid32(2) 2.4 setfsuid(2) 1.2 setfsuid32(2) 2.4 setgid(2) 1.0 setgid32(2) 2.4 setgroups(2) 1.0 setgroups32(2) 2.4 sethae(2) 2.0 Alpha (NOTES) sethostname(2) 1.0 setitimer(2) 1.0 setns(2) 3.0 setpgid(2) 1.0 setpgrp(2) 2.0 setpgid(2) Alpha setpriority(2) 1.0 setregid(2) 1.0 setregid32(2) 2.4 setresgid(2) 2.2 setresgid32(2) 2.4 setresuid(2) 2.2 setresuid32(2) 2.4 setreuid(2) 1.0 setreuid32(2) 2.4 setrlimit(2) 1.0 setsid(2) 1.0 setsockopt(2) 2.0 socketcall(2) settimeofday(2) 1.0 setuid(2) 1.0 setuid32(2) 2.4 setup(2) 1.0 2.2 setxattr(2) 2.6; 2.4.18 sgetmask(2) 1.0 shmat(2) 2.0 ipc(2) shmctl(2) 2.0 ipc(2) shmdt(2) 2.0 ipc(2) shmget(2) 2.0 ipc(2) shutdown(2) 2.0 socketcall(2) sigaction(2) 1.0 sigaltstack(2) 2.2 signal(2) 1.0 signalfd(2) 2.6.22 signalfd4(2) 2.6.27 sigpending(2) 1.0 sigprocmask(2) 1.0 sigreturn(2) 1.0 sigsuspend(2) 1.0 socket(2) 2.0 socketcall(2) socketcall(2) 1.0 socketpair(2) 2.0 socketcall(2) spill(2) 2.6.13 Xtensa splice(2) 2.6.17 spu_create(2) 2.6.16 PowerPC/PowerPC64 spu_run(2) 2.6.16 PowerPC/PowerPC64 ssetmask(2) 1.0 stat(2) 1.0 stat64(2) 2.4 statfs(2) 1.0 statfs64(2) 2.6 statx(2) 4.11 stime(2) 1.0 subpage_prot(2) 2.6.25 PowerPC/PowerPC64 swapcontext(2) 2.6.3 PowerPC/PowerPC64 switch_endian(2) 4.1 PowerPC64 swapoff(2) 1.0 swapon(2) 1.0 symlink(2) 1.0 symlinkat(2) 2.6.16 sync(2) 1.0 sync_file_range(2) 2.6.17 sync_file_range2(2) 2.6.22 syncfs(2) 2.6.39 sys_debug_setcontext(2) 2.6.11 PowerPC syscall(2) 1.0 ARM OABI MIPS O32 ABI sysfs(2) 1.2 sysinfo(2) 1.0 syslog(2) 1.0 sysmips(2) 2.6.0 MIPS tee(2) 2.6.17 tgkill(2) 2.6 time(2) 1.0 timer_create(2) 2.6 timer_delete(2) 2.6 timer_getoverrun(2) 2.6 timer_gettime(2) 2.6 timer_settime(2) 2.6 timerfd_create(2) 2.6.25 timerfd_gettime(2) 2.6.25 timerfd_settime(2) 2.6.25 times(2) 1.0 tkill(2) 2.6; 2.4.22 truncate(2) 1.0 truncate64(2) 2.4 ugetrlimit(2) 2.4 umask(2) 1.0 umount(2) 1.0 umount2(2) 2.2 uname(2) 1.0 unlink(2) 1.0 unlinkat(2) 2.6.16 unshare(2) 2.6.16 uselib(2) 1.0 ustat(2) 1.0 userfaultfd(2) 4.3 usr26(2) 2.4.8.1 ARM OABI usr32(2) 2.4.8.1 ARM OABI utime(2) 1.0 utimensat(2) 2.6.22 utimes(2) 2.2 utrap_install(2) 2.2 SPARC64 vfork(2) 2.2 vhangup(2) 1.0 vm86old(2) 1.0 "vm86" 2.0.28/2.2 vm86(2) 2.0.28 2.2 vmsplice(2) 2.6.17 wait4(2) 1.0 waitid(2) 2.6.10 waitpid(2) 1.0 write(2) 1.0 writev(2) 2.0 xtensa(2) 2.6.13 Xtensa (socket calls) x86-32 ( glibc) socketcall(2) System V IPC ipc(2). : afs_syscall(2) break(2) ftime(2) getpmsg(2) gtty(2) idle(2) lock(2) madvise1(2) mpx(2) phys(2) prof(2) profil(2) putpmsg(2) security(2) stty(2) tuxcall(2) ulimit(2) vserver(2) ( unimplemented(2)). ftime(3) profil(3) ulimit(3) . phys(2) 2.1.116 umount(2) phys(2) . getpmsg(2) putpmsg(2) STREAMS . set_zone_reclaim(2) 2.6.13 2.6.16 . : Blackfin ( 4.17) o bfin_spinlock(2) ( 2.6.22) o dma_memcpy(2) ( 2.6.22) o sram_alloc(2) ( 2.6.22) o sram_free(2) ( 2.6.22) Metag ( 4.17) o metag_get_tls(2) ( 3.9) o metag_set_fpu_flags(2) ( 3.9) o metag_set_tls(2) ( 3.9) o metag_setglobalbit(2) ( 3.9) Tile ( 4.17) o cmpxchg_badaddr(2) ( 2.6.36) __NR_xxx /usr/include/asm/unistd.h sys_xxx(). . sparc sparc64 alpha mips64 32 . . . ( 32 i386) ( truncate(2) truncate64(2)) . ( : glibc ABI ). : o stat(2): sys_stat() ( __NR_oldstat) sys_newstat() ( __NR_stat) sys_stat64() ( __NR_stat64) . lstat(2) fstat(2). o __NR_oldolduname __NR_olduname __NR_uname sys_olduname() sys_uname() sys_newuname(). o 2.0 vm86(2) sys_vm86old() sys_vm86(). o 2.4 getrlimit(2) sys_old_getrlimit() ( __NR_getrlimit) sys_getrlimit() ( __NR_ugetrlimit). o 2.4 16 32 . ( chown32(2) getuid32(2) getgroups32(2) setresuid32(2)) "32". o 2.4 32 ( 32 ). . : fcntl64(2) getdents64(2) stat64(2) statfs64(2) truncate64(2) . "64" "stat". 64 UID/GID 32 ( alpha ia64 s390x x86-64) UID/GID . ( 32 ) *64 *32 . o rt_sig* 2.2 ( signal(7)). "rt_". o select(2) mmap(2) i386. sys_select() sys_mmap() __NR_select __NR_mmap i386 old_select() old_mmap() ( ). __NR__newselect sys_select() __NR_mmap2. s390x 64 old_mmap(). : Alpha getxgid(2) GID GID r0 r20 getgid(2) getegid(2). getxpid(2) PID PID r0 r20 getpid(2) getppid(2). old_adjtimex(2) adjtimex(2) struct timeval32 OSF/1. getxuid(2) UID UID r0 r20 getuid(2) geteuid(2). sethae(2) (Host Address Extension) Alpha 27 . intro(2) syscall(2) unimplemented(2) errno(3) libc(7) vdso(7) ausyscall(8) 3 . . : . 6.18 8 2026 syscalls(2)