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RedHat 9 (Linux i386) - man page for syscalls (redhat section 2)

SYSCALLS(2)			    Linux Programmer's Manual			      SYSCALLS(2)

       none - list of all system calls

       Linux 2.4 system calls.

       The  system call is the fundamental interface between an application and the Linux kernel.
       As    of    Linux    2.4.17,    there	are    1100    system	  calls     listed     in
       /usr/src/linux/include/asm-*/unistd.h.	This man page lists those that are common to most
       platforms (providing hyperlinks if you read this with a browser).

       _llseek(2),  _newselect(2),  _sysctl(2),  accept(2),  access(2),   acct(2),   adjtimex(2),
       afs_syscall,  alarm(2),	bdflush(2),  bind(2),  break,  brk(2),	cacheflush(2), capget(2),
       capset(2), chdir(2), chmod(2), chown(2),  chown32,  chroot(2),  clone(2),  close(2),  con-
       nect(2),   creat(2),   create_module(2),  delete_module(2),  dup(2),  dup2(2),  execve(2),
       exit(2), fchdir(2),  fchmod(2),	fchown(2),  fchown32,  fcntl(2),  fcntl64,  fdatasync(2),
       flock(2),  fork(2),  fstat(2),  fstat64, fstatfs(2), fsync(2), ftime, ftruncate(2), ftrun-
       cate64, get_kernel_syms(2), getcwd(2),  getdents(2),  getdents64,  getegid(2),  getegid32,
       geteuid(2),  geteuid32, getgid(2), getgid32, getgroups(2), getgroups32, getitimer(2), get-
       pagesize(2), getpeername(2), getpmsg, getpgid(2), getpgrp(2), getpid(2), getppid(2),  get-
       priority(2),  getresgid(2),  getresgid32,  getresuid(2),  getresuid32,  getrlimit(2), get-
       rusage(2), getsid(2), getsockname(2), getsockopt(2), gettid,  gettimeofday(2),  getuid(2),
       getuid32,  gtty,  idle,	init_module(2),  ioctl(2),  ioperm(2),	iopl(2), ipc(2), kill(2),
       lchown(2), lchown32, link(2), listen(2), lock, lseek(2),  lstat(2),  lstat64,  madvise(2),
       mincore(2),  mkdir(2),  mknod(2), mlock(2), mlockall(2), mmap(2), modify_ldt(2), mount(2),
       mprotect(2), mpx, mremap(2), msync(2), munlock(2), munlockall(2), munmap(2), nanosleep(2),
       nfsservctl(2),  nice(2),  oldfstat,  oldlstat,  oldolduname, oldstat, oldumount, olduname,
       open(2),  pause(2),  personality(2),  phys,  pipe(2),  pivot_root(2),  poll(2),	prctl(2),
       pread(2),  prof,  profil,  ptrace(2),  putpmsg,	pwrite(2),  query_module(2), quotactl(2),
       read(2), readahead, readdir(2), readlink(2), readv(2),  reboot(2),  recv(2),  recvfrom(2),
       recvmsg(2), rename(2), rmdir(2), rt_sigaction, rt_sigpending, rt_sigprocmask, rt_sigqueue-
       info, rt_sigreturn, rt_sigsuspend, rt_sigtimedwait, sched_get_priority_max(2), sched_get_-
       priority_min(2),   sched_getparam(2),   sched_getscheduler(2),	sched_rr_get_interval(2),
       sched_setparam(2),  sched_setscheduler(2),  sched_yield(2),  security,  select(2),   send-
       file(2),  send(2),  sendmsg(2), sendto(2), setdomainname(2), setfsgid(2), setfsgid32, set-
       fsuid(2), setfsuid32, setgid(2), setgid32, setgroups(2), setgroups32, sethostname(2), set-
       itimer(2), setpgid(2), setpriority(2), setregid(2), setregid32, setresgid(2), setresgid32,
       setresuid(2),  setresuid32,  setreuid(2),  setreuid32,	setrlimit(2),	setsid(2),   set-
       sockopt(2),  settimeofday(2),  setuid(2),  setuid32,  setup(2),	sgetmask(2), shutdown(2),
       sigaction(2), sigaltstack(2), signal(2), sigpending(2), sigprocmask(2), sigreturn(2), sig-
       suspend(2),   socket(2),   socketcall(2),  socketpair(2),  ssetmask(2),	stat(2),  stat64,
       statfs(2), stime(2), stty, swapoff(2),  swapon(2),  symlink(2),	sync(2),  sysfs(2),  sys-
       info(2),   syslog(2),   time(2),  times(2),  truncate(2),  truncate64,  ulimit,	umask(2),
       umount(2), uname(2),  unlink(2),  uselib(2),  ustat(2),	utime(2),  vfork(2),  vhangup(2),
       vm86(2), vm86old, wait4(2), waitpid(2), write(2), writev(2).

       Of  the above, 9 are obsolete, namely getrlimit, oldfstat, oldlstat, oldolduname, oldstat,
       olduname, readdir, select and vm86old (see also obsolete(2)), and 15 are unimplemented  in
       the  standard  kernel,  namely  afs_syscall, break, ftime, getpmsg, gtty, idle, lock, mpx,
       phys, prof, profil, putpmsg, security, stty and ulimit (see also unimplemented(2)).   How-
       ever,  ftime(3),  profil(3) and ulimit(3) exist as library routines.  The slot for phys is
       in use since 2.1.116 for umount; phys will never be implemented. The getpmsg  and  putpmsg
       calls are for kernels patched to support streams, and may never be in the standard kernel.
       The security call is for future use.

       Roughly speaking, the code belonging to the system call with number  __NR_xxx  defined  in
       /usr/include/asm/unistd.h  can  be  found  in  the kernel source in the routine sys_xxx().
       (The dispatch table for i386 can  be  found  in	/usr/src/linux/arch/i386/kernel/entry.S.)
       There  are  many exceptions, however, mostly because older system calls were superseded by
       newer ones, and this has been treated somewhat unsystematically. On platforms with propri-
       etary  OS  emulation,  such as parisc, sparc, sparc64 and alpha, there are many additional
       system calls; mips64 also contains a full set of 32-bit system calls.  Below  the  details
       for Linux 2.4.17.

       The defines __NR_oldstat and __NR_stat refer to the routines sys_stat() and sys_newstat(),
       and similarly for fstat and lstat.  Similarly, the defines __NR_oldolduname, __NR_olduname
       and  __NR_uname	refer  to  the	routines  sys_olduname(), sys_uname() and sys_newuname().
       Thus, __NR_stat and __NR_uname have always referred to the latest version  of  the  system
       call, and the older ones are for backward compatibility.

       It is different with select and mmap.  These use five or more parameters, and caused prob-
       lems the way parameter passing on the i386 used to be set up. Thus, while other	architec-
       tures have sys_select() and sys_mmap() corresponding to __NR_select and __NR_mmap, on i386
       one finds old_select() and old_mmap() (routines that use a pointer to a	parameter  block)
       instead.  These	days  passing  five  parameters is not a problem any more, and there is a
       __NR__newselect (used by libc 6) that corresponds directly to sys_select()  and	similarly

       Two other system call numbers, __NR__llseek and __NR__sysctl have an additional underscore
       absent in sys_llseek() and sys_sysctl().

       Then there is __NR_readdir corresponding to old_readdir(), which will  read  at	most  one
       directory entry at a time, and is superseded by sys_getdents().

       On  many  platforms, including i386, socket calls are all multiplexed through socketcall()
       and System V IPC calls through ipc().

       On newer platforms that only have 64-bit file access and 32-bit uids  (e.g.  alpha,  ia64,
       s390x)  there  are  no *64 or *32 calls. Where the *64 and *32 calls exist, the other ver-
       sions are obsolete.

       The chown and lchown system calls were swapped in 2.1.81. The *64 and *32 calls were added
       for  kernel  2.4,  as  were  the  new  versions	of  getrlimit and mmap, and the new calls
       pivot_root, mincore, madvise, security, gettid and readahead.

Linux 2.4				    2002-01-07				      SYSCALLS(2)

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