What Unix API calls are supported by Cygwin?
********************************************

This is the beginning of documentation listing the calls supported by the Cygwin library.

All POSIX.1/1996 and ANSI C calls are listed in this file.  Note that while almost all POSIX.1/1990 calls are included in Cygwin, most POSIX.1/1996 calls are not (yet at least!).  Additional Unix compatibility calls and extended libc/libm calls are provided by Cygwin but may or may not be listed yet.

To see if a function is implemented but not listed here, check for the presence of the call in the file winsup/cygwin.din in the sources.  In addition, you may want to read the source code corresponding to the call to verify that it is not a stub.  Finally, libc/libm functions (including extended calls not listed here) may be documented in the newlib texinfo documentation.

Calls are implemented on both Windows 95 and NT unless otherwise noted.  Included are references to relevant standards, if any. Calls starting with "cygwin_" are Cygwin-specific calls.

ANSI C Library Functions
========================

(Please note: This section has not yet been updated for the latest net release.)

  libc stdio (newlib/libc/stdio)

       clearerr: C 4.9.10.1

       fclose: C 4.9.5.1, P 8.2.3.2

       feof: C 4.9.10.2

       ferror: C 4.9.10.3

       fflush: C 4.9.5.2, P 8.2.3.4

       fgetc: C 4.9.7.1, P 8.2.3.5

       fgetpos: C 4.9.9.1

       fgets: C 4.9.7.2, P 8.2.3.5

       fopen: C 4.9.5.3, P 8.2.3.1

       fprintf: C 4.9.7.3, P 8.2.3.6

       fputc: C 4.9.7.3, P 8.2.3.6

       fputs: C 4.9.7.4, P 8.2.3.6

       fread: C 4.9.8.1, P 8.2.3.5

       freopen: C 4.9.5.4, P 8.2.3.3

       fscanf: C 4.9.6.2, P 8.2.3.7

       fseek: C 4.9.9.2, P 8.2.3.7

       fsetpos: C 4.9.9.3

       ftell: C 4.9.9.4, P 8.2.3.10

       fwrite: C 4.9.8.2, P 8.2.3.6

       getc: C 4.9.7.5, P 8.2.3.5

       getchar: C 4.9.7.6, P 8.2.3.5

       gets: C 4.9.7.7, P 8.2.3.5

       perror: C 4.9.10.4, P 8.2.3.8

       printf: C 4.9.6.3, P 8.2.3.6

       putc: C 4.9.7.8, P 8.2.3.6

       putchar: C 4.9.7.9, P 8.2.3.6

       puts: C 4.9.7.10, P 8.2.3.6

       remove: C 4.9.4.1, P 8.2.4

       rename: C 4.9.4.2, P 5.5.3.1

       rewind: C 4.9.9.5, P 8.2.3.7

       scanf: C 4.9.6.4, P 8.2.3.5

       setbuf: C 4.9.5.5

       setvbuf: C 4.9.5.6

       sprintf: C 4.9.6.5

       sscanf: C 4.9.6.6

       tmpfile: C 4.9.4.3, P 8.2.3.9

       tmpnam: C 4.9.4.4, P 8.2.5

       vfprintf: C 4.9.6.7

       ungetc: C 4.9.7.11

       vprintf: C 4.9.6.8

       vsprintf: C 4.9.6.9

  libc string (newlib/libc/string)

       memchr: C 4.11.5.1

       memcmp: C 4.11.4.1

       memcpy: C 4.11.2.1

       memmove: C 4.11.2.2

       memset: C 4.11.6.1

       strcat: C 4.11.3.1

       strchr: C 4.11.5.2

       strcmp: C 4.11.4.2

       strcoll: C 4.11.4.3

       strcpy: C 4.11.2.3

       strcspn: C 4.11.5.3

       strerror: C 4.11.6.2

       strlen: C 4.11.6.3

       strncat: C 4.11.3.2

       strncmp: C 4.11.3.2

       strncpy: C 4.11.2.4

       strpbrk: C 4.11.5.4

       strrchr: C 4.11.5.5

       strspn: C 4.11.5.6

       strstr: C 4.11.5.7

       strtok: C 4.11.5.8

       strxfrm: C 4.11.4.5

  libc stdlib (newlib/libc/stdlib, environ.cc, newlib/libc/include/machine/setjmp.h newlib/libc/include/assert.h)

       abort: C 4.10.4.1, P 8.2.3.12

       abs: C 4.10.6.1

       assert: C 4.2.1.1

       atexit: C 4.10.4.2

       atof: C 4.10.1.1

       atoi: C 4.10.1.2

       atol: C 4.10.1.3

       bsearch: C 4.10.5.1

       calloc: C 4.10.3.1

       div: C 4.10.6.2

       exit: C 4.10.4.3, P 8.2.3.12

       free: C 4.10.3.2

       getenv: C 4.10.4.4, P 4.6.1.1

       labs: C 4.10.6.3

       ldiv: C 4.10.6.2

       longjmp: C 4.6.2.1

       malloc: C 4.10.3.3

       mblen: C 4.10.7.1

       mbstowcs: C 4.10.8.1

       mbtowc: C 4.10.7.2

       qsort: 4.10.5.2

       rand: C 4.10.2.1

       realloc: C 4.10.3.4

       setjmp: C 4.6.1.1

       srand: C 4.10.2.2

       strtod: C 4.10.1.4

       strtol: C 4.10.1.5

       strtoul: C 4.10.1.6

       system: C 4.10.4.5

       wcstombs: C 4.10.8.2

       wctomb: C 4.10.7.3

  libc time (times.cc, newlib/libc/time)

       asctime: C 4.12.3.1

       gmtime: C 4.12.3.3

       localtime: C 4.12.3.4, P 8.1.1

       time: C 4.12.2.4, P 4.5.1.1

       clock: C 4.12.2.1

       ctime: C 4.12.3.2

       difftime: C 4.12.2.2

       mktime: C 4.12.2.3, P 8.1.1

       strftime: C 4.11.6.2

  libc signals (signal.cc, newlib/libc/signal)

       raise: C 4.7.2.1

       signal: C 4.7.1.1

  libc ctype (newlib/libc/ctype)

       isalnum: C 4.3.1.1

       isalpha: C 4.3.1.2

       iscntrl: C 4.3.1.3

       isdigit: C 4.3.1.4

       isgraph: C 4.3.1.5

       islower: C 4.3.1.6

       isprint: C 4.3.1.7

       ispunct: C 4.3.1.8

       isspace: C 4.3.1.9

       isupper: C 4.3.1.10

       isxdigit: C 4.3.1.11

       tolower: C 4.3.2.1

       toupper: C 4.3.2.2

  libm math (newlib/libm/math)

       acos: C 4.5.2.1

       asin: C 4.5.2.2

       atan: C 4.5.2.3

       atan2: C 4.5.2.4

       ceil: C 4.5.6.1

       cos: C 4.5.2.5

       cosh: C 4.5.3.2

       exp: C 4.5.4.1

       fabs: C 4.5.6.2

       floor: C 4.5.6.3

       fmod: C 4.5.6.4

       frexp: C 4.5.4.2

       ldexp: C 4.5.4.3

       log: C 4.5.4.4

       log10: C 4.5.4.5

       modf: C 4.5.4.6

       pow: C 4.5.5.1

       sin: C 4.5.2.6

       sinh: C 4.5.3.2

       sqrt: C 4.5.5.2

       tan: C 4.5.2.7

       tanh: C 4.5.3.3

  libc misc (newlib/libc/locale, gcc/ginclude/stdarg.h)

       localeconv: C 4.4.2.1

       setlocale: C 4.4.1.1, P 8.1.2.1

       va_arg: C 4.8.1.2

       va_end: C 4.8.1.3

       va_start: C 4.8.1.1

POSIX.1/96 Functions
====================

(Please note: This section has not yet been updated for the latest net release.)

Process Primitives (Section 3)

  fork: P 3.1.1.1

  execl: P 3.1.2.1

  execle: P 3.1.2.1

  execlp: P 3.1.2.1

  execv: P 3.1.2.1

  execve: P 3.1.2.1

  execvp: P 3.1.2.1

  pthread_atfork: P96 3.1.3.1 -- unimplemented

  wait: P 3.2.1.1

  waitpid: P 3.2.1.1

  _exit: P 3.2.2.1

  kill: P 3.3.2.1

  sigemptyset: P 3.3.3.1

  sigfillset: P 3.3.3.1

  sigaddset: P 3.3.3.1

  sigdelset: P 3.3.3.1

  sigismember: P 3.3.3.1

  sigaction: P 3.3.4.1

  pthread_sigmask: P96 3.3.5.1

  sigprocmask: P 3.3.5.1

  sigpending: P 3.3.6.1

  sigsuspend: P 3.3.7.1

  sigwait: P96 3.3.8.1 -- unimplemented

  sigwaitinfo: P96 3.3.8.1 -- unimplemented

  sigtimedwait: P96 3.3.8.1 -- unimplemented

  sigqueue: P96 3.3.9.1 -- unimplemented

  pthread_kill: P96 3.3.10.1

  alarm: P 3.4.1.1

  pause: P 3.4.2.1

  sleep: P 3.4.3.1

Process Environment (Section 4)

  getpid: P 4.1.1.1

  getppid: P 4.1.1.1

  getuid: P 4.2.1.1

  geteuid: P 4.2.1.1

  getgid: P 4.2.1.1

  getegid: P 4.2.1.1

  setuid: P 4.2.2.1 (stub on 9X, sets ENOSYS, returns zero)

  setgid: P 4.2.2.1 (stub on 9X, sets ENOSYS, returns zero)

  getgroups: P 4.2.3.1

  getlogin: P 4.2.4.1

  getlogin_r: P 4.2.4.1 -- unimplemented

  getpgrp: P 4.3.1.1

  setsid: P 4.3.2.1

  setpgid: P 4.3.3.1

  uname: P 4.4.1.1

  time: C 4.12.2.4, P 4.5.1.1

  times: P 4.5.2.1

  getenv: C 4.10.4.4, P 4.6.1.1

  ctermid: P 4.7.1.1

  ttyname: P 4.7.2.1

  ttyname_r: P 4.7.2.1 -- unimplemented

  isatty: P 4.7.2.1

  sysconf: P 4.8.1.1

Files and Directories (Section 5)

  opendir: P 5.1.2.1

  readdir: P 5.1.2.1

  readdir_r: P96 5.1.2.1 -- unimplemented

  rewinddir: P 5.1.2.1

  closedir: P 5.1.2.1

  chdir: P 5.2.1.1

  getcwd: P 5.2.2.1

  open: P 5.3.1.1

  creat: P 5.3.2.1

  umask: P 5.3.3.1

  link: P 5.3.4.1 (copy file in Win 95, and when link fails in NT)

  mkdir: P 5.4.1.1

  mkfifo: P 5.4.2.1 -- unimplemented!!!

  unlink: P 5.5.1.1

  rmdir: P 5.5.2.1

  rename: C 4.9.4.2, P 5.5.3.1

  stat: P 5.6.2.1

  fstat: P 5.6.2.1

  access: P 5.6.3.1

  chmod: P 5.6.4.1

  fchmod: P96 5.6.4.1

  chown: P 5.6.5.1 (stub in Win 95; always returns zero)

  utime: P 5.6.6.1

  ftruncate: P96 5.6.7.1

  pathconf: P 5.7.1.1

  fpathconf: P 5.7.1.1

Input and Output Primitives (Section 6)

  pipe: P 6.1.1.1

  dup: P 6.2.1.1

  dup2: P 6.2.1.1

  close: P 6.3.1.1

  read: P 6.4.1.1

  write: P 6.4.2.1

  fcntl: P 6.5.2.1 (note: fcntl(fd, F_GETLK,...) is not implemented (returns -1 with errno set to ENOSYS)).

  lseek: P 6.5.3.1 (note: only works correctly on binary files)

  fsync: P96 6.6.1.1

  fdatasync: P96 6.6.2.1 -- unimplemented

  aio_read: P96 6.7.2.1 -- unimplemented

  aio_write: P96 6.7.3.1 -- unimplemented

  lio_listio: P96 6.7.4.1 -- unimplemented

  aio_error: P96 6.7.5.1 -- unimplemented

  aio_return: P96 6.7.6.1 -- unimplemented

  aio_cancel: P96 6.7.7.1 -- unimplemented

  aio_suspend: P96 6.7.8.1 -- unimplemented

  aio_fsync: P96 6.7.9.1 -- unimplemented

Device- and Class-Specific Functions (Section 7)

  cfgetispeed: P96 7.1.3.1

  cfgetospeed: P96 7.1.3.1

  cfsetispeed: P96 7.1.3.1

  cfsetospeed: P96 7.1.3.1

  tcdrain: P 7.2.2.1

  tcflow: P 7.2.2.1

  tcflush: P 7.2.2.1

  tcgetattr: P96 7.2.1.1

  tcgetpgrp: P 7.2.3.1

  tcsendbreak: P 7.2.2.1

  tcsetattr: P96 7.2.1.1

  tcsetpgrp: P 7.2.4.1

Language-Specific Services for the C Programming Language
(Section 8)

  abort: C 4.10.4.1, P 8.2.3.12

  asctime_r: P96 8.3.4.1 -- unimplemented

  ctime_r: P96 8.3.5.1 -- unimplemented

  exit: C 4.10.4.3, P 8.2.3.12

  fclose: C 4.9.5.1, P 8.2.3.2

  fdopen: P 8.2.2.1

  fflush: C 4.9.5.2, P 8.2.3.4

  fgetc: C 4.9.7.1, P 8.2.3.5

  fgets: C 4.9.7.2, P 8.2.3.5

  fileno: P 8.2.1.1

  flockfile: P96 8.2.6.1 -- unimplemented

  fopen: C 4.9.5.3, P 8.2.3.1

  fprintf: C 4.9.7.3, P 8.2.3.6

  fputc: C 4.9.7.3, P 8.2.3.6

  fputs: C 4.9.7.4, P 8.2.3.6

  fread: C 4.9.8.1, P 8.2.3.5

  freopen: C 4.9.5.4, P 8.2.3.3

  fscanf: C 4.9.6.2, P 8.2.3.7

  fseek: C 4.9.9.2, P 8.2.3.7

  ftell: C 4.9.9.4, P 8.2.3.10

  ftrylockfile: P96 8.2.6.1 -- unimplemented

  funlockfile: P96 8.2.6.1 -- unimplemented

  fwrite: C 4.9.8.2, P 8.2.3.6

  getc: C 4.9.7.5, P 8.2.3.5

  getc_unlocked: P96 8.2.7.1 -- unimplemented

  getchar: C 4.9.7.6, P 8.2.3.5

  getchar_unlocked: P96 8.2.7.1 -- unimplemented

  gets: C 4.9.7.7, P 8.2.3.5

  gmtime_r: P96 8.3.6.1 -- unimplemented

  localtime_r: P96 8.3.7.1 -- unimplemented

  perror: C 4.9.10.4, P 8.2.3.8

  printf: C 4.9.6.3, P 8.2.3.6

  putc: C 4.9.7.8, P 8.2.3.6

  putc_unlocked: P96 8.2.7.1 -- unimplemented

  putchar: C 4.9.7.9, P 8.2.3.6

  putchar_unlocked: P96 8.2.7.1 -- unimplemented

  puts: C 4.9.7.10, P 8.2.3.6

  rand_r: P96 8.3.8.1 -- unimplemented

  remove: C 4.9.4.1, P 8.2.4

  rewind: C 4.9.9.5, P 8.2.3.7

  scanf: C 4.9.6.4, P 8.2.3.5

  setlocale: C 4.4.1.1, P 8.1.2.1

  siglongjmp: P 8.3.1.1

  sigsetjmp: P 8.3.1.1

  strtok_r: P96 8.3.3.1 -- unimplemented

  tmpfile: C 4.9.4.3, P 8.2.3.9

  tmpnam: C 4.9.4.4, P 8.2.5

  tzset: P 8.3.2.1

System Databases (Section 9)

  getgrgid: P 9.2.1.1

  getgrgid_r: P96 9.2.1.1 -- unimplemented

  getgrnam: P 9.2.1.1

  getgrnam_r: P96 9.2.1.1 -- unimplemented

  getpwnam: P 9.2.2.1

  getpwnam_r: P96 9.2.2.1 -- unimplemented

  getpwuid: P 9.2.2.1

  getpwuid_r: P96 9.2.2.1 -- unimplemented

Synchronization (Section 11)

  pthread_cond_broadcast: P96 11.4.3.1 -- unimplemented

  pthread_cond_destroy: P96 11.4.2.1 -- unimplemented

  pthread_cond_init: P96 11.4.2.1 -- unimplemented

  pthread_cond_signal: P96 11.4.3.1 -- unimplemented

  pthread_cond_timedwait: P96 11.4.4.1 -- unimplemented

  pthread_cond_wait: P96 11.4.4.1 -- unimplemented

  pthread_condattr_destroy: P96 11.4.1.1 -- unimplemented

  pthread_condattr_getpshared: P96 11.4.1.1 -- unimplemented

  pthread_condattr_init: P96 11.4.1.1 -- unimplemented

  pthread_condattr_setpshared: P96 11.4.1.1 -- unimplemented

  pthread_mutex_destroy: P96 11.3.2.1

  pthread_mutex_init: P96 11.3.2.1

  pthread_mutex_lock: P96 11.3.3.1

  pthread_mutex_trylock: P96 11.3.3.1

  pthread_mutex_unlock: P96 11.3.3.1

  sem_close: P96 11.2.4.1 -- unimplemented

  sem_destroy: P96 11.2.2.1

  sem_getvalue: P96 11.2.8.1 -- unimplemented

  sem_init: P96 11.2.1.1

  sem_open: P96 11.2.3.1 -- unimplemented

  sem_post: P96 11.2.7.1

  sem_trywait: P96 11.2.6.1

  sem_unlink: P96 11.2.5.1 -- unimplemented

  sem_wait: P96 11.2.6.1

Memory Management (Section 12)

  mlock: P96 12.1.2.1 -- unimplemented

  mlockall: P96 12.1.1.1 -- unimplemented

  mmap: P96 12.2.1.1

  mprotect: P96 12.2.3.1

  msync: P96 12.2.4.1

  munlock: P96 12.1.2.1 -- unimplemented

  munlockall: P96 12.1.1.1 -- unimplemented

  munmap: P96 12.2.2.1

  shm_open: P96 12.3.1.1 -- unimplemented

  shm_unlink: P96 12.3.2.1 -- unimplemented

Execution Scheduling (Section 13)

  pthread_attr_getinheritsched: P96 13.5.1.1 -- unimplemented

  pthread_attr_getschedparam: P96 13.5.1.1 -- unimplemented

  pthread_attr_getschedpolicy: P96 13.5.1.1 -- unimplemented

  pthread_attr_getscope: P96 13.5.1.1 -- unimplemented

  pthread_attr_setinheritsched: P96 13.5.1.1 -- unimplemented

  pthread_attr_setschedparam: P96 13.5.1.1 -- unimplemented

  pthread_attr_setschedpolicy: P96 13.5.1.1 -- unimplemented

  pthread_attr_setscope: P96 13.5.1.1 -- unimplemented

  pthread_getschedparam: P96 13.5.2.1 -- unimplemented

  pthread_mutex_getprioceiling: P96 13.6.2.1 -- unimplemented

  pthread_mutex_setprioceiling: P96 13.6.2.1 -- unimplemented

  pthread_mutexattr_getprioceiling: P96 13.6.1.1 -- unimplemented

  pthread_mutexattr_getprotocol: P96 13.6.1.1 -- unimplemented

  pthread_mutexattr_setprioceiling: P96 13.6.1.1 -- unimplemented

  pthread_mutexattr_setprotocol: P96 13.6.1.1 -- unimplemented

  pthread_setschedparam: P96 13.5.2.1 -- unimplemented

  sched_get_priority_max: P96 13.3.6.1 -- unimplemented

  sched_get_priority_min: P96 13.3.6.1 -- unimplemented

  sched_getparam: P96 13.3.2.1 -- unimplemented

  sched_getscheduler: P96 13.3.4.1 -- unimplemented

  sched_rr_get_interval: P96 13.3.6.1 -- unimplemented

  sched_setparam: P96 13.3.1.1 -- unimplemented

  sched_setscheduler: P96 13.3.3.1 -- unimplemented

  sched_yield: P96 13.3.5.1 -- unimplemented

Clocks and Timers (Section 14)

  clock_getres: P96 14.2.1.1 -- unimplemented

  clock_gettime: P96 14.2.1.1 -- unimplemented

  clock_settime: P96 14.2.1.1 -- unimplemented

  nanosleep: P96 14.2.5.1 -- unimplemented

  timer_create: P96 14.2.2.1 -- unimplemented

  timer_delete: P96 14.2.3.1 -- unimplemented

  timer_getoverrun: P96 14.2.4.1 -- unimplemented

  timer_gettime: P96 14.2.4.1 -- unimplemented

  timer_settime: P96 14.2.4.1 -- unimplemented

Message Passing (Section 15)

  mq_close: P96 15.2.2.1 -- unimplemented

  mq_getattr: P96 15.2.8.1 -- unimplemented

  mq_notify: P96 15.2.6.1 -- unimplemented

  mq_open: P96 15.2.1.1 -- unimplemented

  mq_receive: P96 15.2.5.1 -- unimplemented

  mq_send: P96 15.2.4.1 -- unimplemented

  mq_setattr: P96 15.2.7.1 -- unimplemented

  mq_unlink: P96 15.2.3.1 -- unimplemented

Thread Management (Section 16)

  pthread_attr_destroy: P96 16.2.1.1

  pthread_attr_getdetachstate: P96 16.2.1.1 -- unimplemented

  pthread_attr_getstackaddr: P96 16.2.1.1 -- unimplemented

  pthread_attr_getstacksize: P96 16.2.1.1

  pthread_attr_init: P96 16.2.1.1

  pthread_attr_setdetachstate: P96 16.2.1.1 -- unimplemented

  pthread_attr_setstackaddr: P96 16.2.1.1 -- unimplemented

  pthread_attr_setstacksize: P96 16.2.1.1

  pthread_create: P96 16.2.2.1

  pthread_detach: P96 16.2.4.1 -- unimplemented

  pthread_equal: P96 16.2.7.1

  pthread_exit: P96 16.2.5.1

  pthread_join: P96 16.2.3.1 -- unimplemented

  pthread_once: P96 16.2.8.1 -- unimplemented

  pthread_self: P96 16.2.6.1

Thread-Specific Data (Section 17)

  pthread_getspecific: P96 17.1.2.1

  pthread_key_create: P96 17.1.1.1

  pthread_key_delete: P96 17.1.3.1

  pthread_setspecific: P96 17.1.2.1

Thread Cancellation (Section 18)

  pthread_cancel: P96 18.2.1.1 -- unimplemented

  pthread_cleanup_pop: P96 18.2.3.1 -- unimplemented

  pthread_cleanup_push: P96 18.2.3.1 -- unimplemented

  pthread_setcancelstate: P96 18.2.2.1 -- unimplemented

  pthread_setcanceltype: P96 18.2.2.1 -- unimplemented

  pthread_testcancel: P96 18.2.2.1 -- unimplemented

Misc Functions
==============

(Please note: This section has not yet been updated for the latest net release.)

Networking (net.cc) (Standardized by POSIX 1.g, which is probably still in draft?)

  accept

  bind

  connect

  getdomainname

  gethostbyaddr

  gethostbyname

  getpeername

  getprotobyname

  getprotobynumber

  getservbyname

  getservbyport

  getsockname

  getsockopt

  herror

  htonl

  htons

  inet_addr

  inet_makeaddr

  inet_netof

  inet_ntoa

  listen

  ntohl

  ntohs

  rcmd

  recv

  recvfrom

  rexec

  rresvport

  send

  sendto

  setsockopt

  shutdown

  socket

  socketpair

Of these networking calls, rexec, rcmd and rresvport are implemented in MS IP stack but may not be implemented in other vendors' stacks.

Other

  acl

  aclcheck

  aclfrommode

  aclfrompbits

  aclfromtext

  aclsort

  acltomode

  acltopbits

  acltotext

  chroot (with restrictions)

  closelog

  cwait

  cygwin_conv_to_full_posix_path

  cygwin_conv_to_full_win32_path

  cygwin_conv_to_posix_path

  cygwin_conv_to_win32_path

  cygwin_logon_user

  cygwin_posix_path_list_p

  cygwin_posix_to_win32_path_list

  cygwin_posix_to_win32_path_list_buf_size

  cygwin_set_impersonation_token

  cygwin_split_path

  cygwin_win32_to_posix_path_list

  cygwin_win32_to_posix_path_list_buf_size

  cygwin_winpid_to_pid

  dlclose

  dlerror

  dlfork

  dlopen

  dlsym

  endgrent

  endhostent

  facl

  ffs

  fstatfs

  ftime

  get_osfhandle

  getdtablesize

  getgrent

  gethostname

  getitimer

  getmntent

  getpagesize

  getpgid

  getpwent

  gettimeofday: BSD

  grantpt

  initgroups (stub)

  ioctl

  killpg

  login

  logout

  lstat

  mknod (stub, sets ENOSYS, returns -1)

  memccpy

  nice

  openlog

  pclose

  popen

  ptsname

  putenv

  random

  readv

  realpath

  regfree

  rexec

  select

  setegid: SVR4 (stub on 9X, sets ENOSYS, returns zero)endpwent

  setenv

  seterrno

  seteuid (stub on 9X, sets ENOSYS, returns zero)

  sethostent

  setitimer

  setmntent

  setmode

  setpassent

  setpgrp

  setpwent

  settimeofday: BSD (stub, set ENOSYS, return -1)

  sexecl

  sexecle

  sexeclp

  sexeclpe

  sexeclpe

  sexecp

  sexecv

  sexecve

  sexecvpe

  sigpause

  spawnl (spawn calls are from Windows C library)

  spawnle

  spawnlp

  spawnlpe

  spawnv

  spawnve

  spawnvp

  spawnvpe

  srandom

  statfs

  strsignal

  strtosigno

  swab

  syslog

  timezone

  truncate (SVR4/4.3+BSD)

  ttyslot

  unlockpt

  unsetenv

  usleep

  utimes

  vfork: stub that calls fork

  vhangup (stub, sets ENOSYS, returns -1)

  wait3

  wait4

  wcscmp

  wcslen

  wprintf

  writev