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    exec Functions
    spawn Functions

EACCES
    _dos_creat
    _dos_creatnew
    _dos_open
    _dos_read
    _dos_setfileattr
    _dos_write
    access, _access, _waccess
    chmod, _wchmod
    chsize
    creat, _wcreat
    exec Functions
    locking, _locking
    mkdir, _mkdir, _wmkdir
    open, _open, _wopen
    opendir, _wopendir
    sopen, _wsopen
    stat, _stat, _wstat
    utime, _utime, _wutime

EAGAIN

EBADF
    _dos_close
    _dos_commit
    _dos_getftime
    _dos_read
    _dos_setftime
    _dos_write
    _get_osfhandle
    chsize
    close, _close
    closedir, _wclosedir
    dup, _dup
    dup2
    eof
    File Position Errors
    fstat, _fstat
    fsync
    locking, _locking
    lseek, _lseek
    readdir, _wreaddir

ECHILD
    _pclose
    cwait
    wait

ecvt
    ecvt, _ecvt
    fcvt, _fcvt, _wfcvt

ecvt, _ecvt

EDEADLOCK

EDOM
    acos
    acosh
    asin
    atan2
    atanh
    bessel Functions
    log
    log10
    log2
    pow
    sqrt
    strtol, wcstol
    strtoul, wcstoul

EEXIST

EGA
    _getvideoconfig
    _setvideomode

EILSEQ
    fgetc, fgetwc
    fgetchar, _fgetchar, _fgetwchar
    fputc, fputwc
    getc, getwc
    getchar, getwchar
    mbrlen, _fmbrlen
    mbrtowc, _fmbrtowc
    mbsrtowcs, _fmbsrtowcs
    wcrtomb, _fwcrtomb
    wcsrtombs, _fwcsrtombs

EINTR
    _pclose
    cwait
    wait

EINVAL
    _beginthread
    _dos_getdiskfree
    _dos_open
    _dos_setdate
    _dos_settime
    _findfirst, _wfindfirst
    _getdcwd, _wgetdcwd
    _getdiskfree
    _popen, _wpopen
    _stricoll, _wcsicoll, _mbsicoll
    _strncoll, _wcsncoll, _mbsncoll
    _strnicoll, _wcsnicoll, _mbsnicoll
    cwait
    fsync
    getcwd, _wgetcwd
    locking, _locking
    lseek, _lseek
    signal
    spawn Functions
    utime, _utime, _wutime

EIO

ellipse

EMFILE
    _dos_creat
    _dos_creatnew
    _dos_open
    _pipe
    creat, _wcreat
    dup, _dup
    dup2
    exec Functions
    open, _open, _wopen
    sopen, _wsopen
    utime, _utime, _wutime

enable

endthread

ENFILE

ENHANCED

ENOENT
    _dos_creat
    _dos_creatnew
    _dos_find Functions
    _dos_getfileattr
    _dos_open
    _dos_setfileattr
    _findclose
    _findfirst, _wfindfirst
    _findnext, _wfindnext
    _fullpath, _wfullpath
    access, _access, _waccess
    chdir, _wchdir
    chmod, _wchmod
    creat, _wcreat
    exec Functions
    mkdir, _mkdir, _wmkdir
    open, _open, _wopen
    opendir, _wopendir
    sopen, _wsopen
    spawn Functions
    utime, _utime, _wutime

ENOMEM
    _beginthread
    _dos_allocmem
    _dos_freemem
    _dos_setblock
    _fullpath, _wfullpath
    _getdcwd, _wgetdcwd
    clearenv
    exec Functions
    getcwd, _wgetcwd
    putenv, _putenv, _wputenv
    setenv, _setenv, _wsetenv
    spawn Functions

ENOSPC
    _pipe
    chsize

ENOSYS

env.h

environ
    clearenv
    Global Data
    setenv, _setenv, _wsetenv

environment
    getenv, _wgetenv
    putenv, _putenv, _wputenv
    setenv, _setenv, _wsetenv

Environment Functions

Environment Names

EOF
    _getw
    _putw
    cscanf
    eof
    fcloseall
    fgetc, fgetwc
    fgetchar, _fgetchar, _fgetwchar
    fputc, fputwc
    fputchar, _fputchar, _fputwchar
    fscanf, fwscanf
    getc, getwc
    getchar, getwchar
    putc, putwc
    putchar, putwchar
    scanf, wscanf
    sscanf, swscanf
    ungetc, ungetwc
    ungetch
    vcscanf
    vfscanf, vfwscanf
    vscanf, vwscanf
    vsscanf, vswscanf

ERANGE
    _fullpath, _wfullpath
    _getdcwd, _wgetdcwd
    cosh
    exp
    getcwd, _wgetcwd
    sinh
    strtod, wcstod
    strtol, wcstol
    strtoul, wcstoul
    Underflow of Floating-Point Values

ERESCOLOR

ERESNOCOLOR

EROFS

errno
    _beginthread
    _bprintf, _bwprintf
    _dos_allocmem
    _dos_close
    _dos_commit
    _dos_creat
    _dos_creatnew
    _dos_find Functions
    _dos_freemem
    _dos_getdiskfree
    _dos_getfileattr
    _dos_getftime
    _dos_open
    _dos_read
    _dos_setblock
    _dos_setdate
    _dos_setfileattr
    _dos_setftime
    _dos_settime
    _dos_write
    _findclose
    _findfirst, _wfindfirst
    _findnext, _wfindnext
    _fsopen, _wfsopen
    _fullpath, _wfullpath
    _get_osfhandle
    _getdcwd, _wgetdcwd
    _getdiskfree
    _grow_handles
    _mktemp, _wmktemp
    _pclose
    _pipe
    _popen, _wpopen
    _set_matherr
    _snprintf, _snwprintf
    _stricoll, _wcsicoll, _mbsicoll
    _strncoll, _wcsncoll, _mbsncoll
    _strnicoll, _wcsnicoll, _mbsnicoll
    _vsnprintf, _vsnwprintf
    access, _access, _waccess
    acos
    acosh
    asin
    atan2
    atanh
    atof, _wtof
    bessel Functions
    chdir, _wchdir
    chmod, _wchmod
    chsize
    clearenv
    close, _close
    closedir, _wclosedir
    cosh
    cputs
    creat, _wcreat
    cscanf
    cwait
    dup, _dup
    dup2
    eof
    exec Functions
    exp
    fclose
    fdopen, _wfdopen
    fflush
    fgetc, fgetwc
    fgetchar, _fgetchar, _fgetwchar
    fgetpos
    fgets, fgetws
    File Position Errors
    filelength
    fileno
    flushall
    fopen, _wfopen
    fprintf, fwprintf
    fputc, fputwc
    fputchar, _fputchar, _fputwchar
    fputs, fputws
    fread
    freopen, _wfreopen
    fscanf, fwscanf
    fseek
    fsetpos
    fstat, _fstat
    fsync
    ftell
    fwrite
    getc, getwc
    getchar, getwchar
    getcwd, _wgetcwd
    gets, _getws
    Global Data
    Header Files in /watcom/h
    hypot
    intdos
    intdosx
    isatty
    Library Functions and Macros
    lock
    locking, _locking
    log
    log10
    log2
    lseek, _lseek
    matherr
    mbrlen, _fmbrlen
    mbrtowc, _fmbrtowc
    mbsrtowcs, _fmbsrtowcs
    mkdir, _mkdir, _wmkdir
    open, _open, _wopen
    opendir, _wopendir
    perror, _wperror
    pow
    printf, wprintf
    putc, putwc
    putchar, putwchar
    putenv, _putenv, _wputenv
    puts, _putws
    read
    readdir, _wreaddir
    remove, _wremove
    rename, _wrename
    rmdir, _wrmdir
    sbrk
    setenv, _setenv, _wsetenv
    setmode
    signal
    sinh
    sopen, _wsopen
    spawn Functions
    sprintf, swprintf
    sqrt
    stat, _stat, _wstat
    strftime, wcsftime, _wstrftime_ms
    strtod, wcstod
    strtol, wcstol
    strtoul, wcstoul
    system, _wsystem
    tan
    tanh
    tell
    tmpfile
    Underflow of Floating-Point Values
    unlock
    utime, _utime, _wutime
    vcprintf
    vcscanf
    vfprintf, vfwprintf
    vfscanf, vfwscanf
    vprintf, vwprintf
    wait
    wcrtomb, _fwcrtomb
    wcsrtombs, _fwcsrtombs
    write

errno.h

Error Handling
    Global Data
    Header Files in /watcom/h

Error Handling, _clear87

Error Handling, _control87

Error Handling, _controlfp

Error Handling, _fpreset

Error Handling, _set_matherr

Error Handling, _status87

Error Handling, _wperror

Error Handling, clearerr

Error Handling, dosexterr

Error Handling, feof

Error Handling, ferror

Error Handling, matherr

Error Handling, perror

Error Handling, raise

Error Handling, signal

Error Handling, stderr

Error Handling, strerror

Error Handling, wcserror

exception

exec
    DOS Processes
    exec Functions
    Header Files in /watcom/h
    Process Primitive Functions
    sbrk
    spawn Functions
    system, _wsystem

exec Functions

execl

execle

execlp

execlpe

execv

execve

execvp

execvpe

exit
    _beginthread
    _exit
    cwait
    exit
    main, wmain, WinMain, wWinMain
    signal
    The atexit Function
    wait

EXIT_FAILURE

EXIT_SUCCESS

exp

expand

extern

F_OK

fabs

fclose

fcloseall

fcntl

fcntl.h

fcvt
    ecvt, _ecvt
    fcvt, _fcvt, _wfcvt

fcvt, _fcvt, _wfcvt

fdopen
    fcloseall
    fdopen, _wfdopen

fdopen, _wfdopen

feof
    feof
    fread

ferror
    _getw
    _putw
    ferror
    fread

fflush
    _fsopen, _wfsopen
    fflush
    flushall
    fopen, _wfopen
    ungetc, ungetwc

fgetc
    fgetc, fgetwc
    fgetchar, _fgetchar, _fgetwchar
    getc, getwc

fgetc, fgetwc

fgetchar

fgetchar, _fgetchar, _fgetwchar

fgetpos
    fgetpos
    File Position Errors
    fsetpos

fgets
    fgets, fgetws
    gets, _getws

fgets, fgetws

fgetwc

fgetwchar

fgetws

FILE
    Header Files in /watcom/h
    Stream I/O Functions

File Access Limits

File Buffering

File Manipulation Functions

File Names

File Operations

File Operations, _access

File Operations, _mktemp

File Operations, _stat

File Operations, _tempnam

File Operations, _waccess

File Operations, _wchmod

File Operations, _wmktemp

File Operations, _wremove

File Operations, _wrename

File Operations, _wstat

File Operations, _wtempnam

File Operations, _wtmpnam

File Operations, _wunlink

File Operations, access

File Operations, chmod

File Operations, remove

File Operations, rename

File Operations, stat

File Operations, tmpnam

File Operations, unlink

File Position Errors

File Position in Append Mode

filelength

Filename Parsing Functions, _fullpath

Filename Parsing Functions, _makepath

Filename Parsing Functions, _splitpath

Filename Parsing Functions, _splitpath2

Filename Parsing Functions, _wfullpath

Filename Parsing Functions, _wmakepath

Filename Parsing Functions, _wsplitpath

Filename Parsing Functions, _wsplitpath2

fileno
    fileno
    Stream I/O Functions

find_t

findclose

findfirst

findnext

fixed-point
    printf, wprintf
    scanf, wscanf

float.h

floor

fltused_