The Open Group Base Specifications Issue 7
IEEE Std 1003.1, 2013 Edition
Copyright © 2013 The IEEE and The Open Group, All Rights reserved.

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### F

- fabs(), fabsf, fabsl - absolute value function
- fabsf(), fabs, fabsl - absolute value function
- fabsl(), fabs, fabsf - absolute value function
- faccessat(), access - determine accessibility of a file relative to directory file descriptor
- false - return false value
- fattach() - attach a STREAMS-based file descriptor to a file in the file system name space (STREAMS)
- fc - process the command history list
- fchdir() - change working directory
- fchmod() - change mode of a file
- fchmodat(), chmod - change mode of a file relative to directory file descriptor
- fchown() - change owner and group of a file
- fchownat(), chown - change owner and group of a file relative to directory file descriptor
- fclose() - close a stream
- fcntl() - file control
- fcntl.h - file control options
- fdatasync() - synchronize the data of a file (REALTIME)
- fdetach() - detach a name from a STREAMS-based file descriptor (STREAMS)
- fdim(), fdimf, fdiml - compute positive difference between two floating-point numbers
- fdimf(), fdim, fdiml - compute positive difference between two floating-point numbers
- fdiml(), fdim, fdimf - compute positive difference between two floating-point numbers
- fdopen() - associate a stream with a file descriptor
- fdopendir(), opendir - open directory associated with file descriptor
- FD_CLR(), pselect, select - synchronous I/O multiplexing
- FD_ISSET(), pselect, select - synchronous I/O multiplexing
- FD_SET(), pselect, select - synchronous I/O multiplexing
- FD_ZERO(), pselect, select - synchronous I/O multiplexing
- feclearexcept() - clear floating-point exception
- fegetenv(), fesetenv - get and set current floating-point environment
- fegetexceptflag(), fesetexceptflag - get and set floating-point status flags
- fegetround(), fesetround - get and set current rounding direction
- feholdexcept() - save current floating-point environment
- fenv.h - floating-point environment
- feof() - test end-of-file indicator on a stream
- feraiseexcept() - raise floating-point exception
- ferror() - test error indicator on a stream
- fesetenv(), fegetenv - get and set current floating-point environment
- fesetexceptflag(), fegetexceptflag - get and set floating-point status flags
- fesetround(), fegetround - get and set current rounding direction
- fetestexcept() - test floating-point exception flags
- feupdateenv() - update floating-point environment
- fexecve(), environ, execl, execle, execlp, execv, execve, execvp - execute a file
- fflush() - flush a stream
- ffs() - find first set bit
- fg - run jobs in the foreground
- fgetc() - get a byte from a stream
- fgetpos() - get current file position information
- fgets() - get a string from a stream
- fgetwc() - get a wide-character code from a stream
- fgetws() - get a wide-character string from a stream
- file - determine file type
- fileno() - map a stream pointer to a file descriptor
- find - find files
- float.h - floating types
- flockfile(), ftrylockfile, funlockfile - stdio locking functions
- floor(), floorf, floorl - floor function
- floorf(), floor, floorl - floor function
- floorl(), floor, floorf - floor function
- fma(), fmaf, fmal - floating-point multiply-add
- fmaf(), fma, fmal - floating-point multiply-add
- fmal(), fma, fmaf - floating-point multiply-add
- fmax(), fmaxf, fmaxl - determine maximum numeric value of two floating-point numbers
- fmaxf(), fmax, fmaxl - determine maximum numeric value of two floating-point numbers
- fmaxl(), fmax, fmaxf - determine maximum numeric value of two floating-point numbers
- fmemopen() - open a memory buffer stream
- fmin(), fminf, fminl - determine minimum numeric value of two floating-point numbers
- fminf(), fmin, fminl - determine minimum numeric value of two floating-point numbers
- fminl(), fmin, fminf - determine minimum numeric value of two floating-point numbers
- fmod(), fmodf, fmodl - floating-point remainder value function
- fmodf(), fmod, fmodl - floating-point remainder value function
- fmodl(), fmod, fmodf - floating-point remainder value function
- fmtmsg() - display a message in the specified format on standard error and/or a system console
- fmtmsg.h - message display structures
- fnmatch() - match a filename string or a pathname
- fnmatch.h - filename-matching types
- fold - filter for folding lines
- fopen() - open a stream
- fork() - create a new process
- fort77 - FORTRAN compiler (FORTRAN)
- fpathconf(), pathconf - get configurable pathname variables
- fpclassify() - classify real floating type
- fprintf(), dprintf, printf, snprintf, sprintf - print formatted output
- fputc() - put a byte on a stream
- fputs() - put a string on a stream
- fputwc() - put a wide-character code on a stream
- fputws() - put a wide-character string on a stream
- fread() - binary input
- free() - free allocated memory
- freeaddrinfo(), getaddrinfo - get address information
- freelocale() - free resources allocated for a locale object
- freopen() - open a stream
- frexp(), frexpf, frexpl - extract mantissa and exponent from a double precision number
- frexpf(), frexp, frexpl - extract mantissa and exponent from a double precision number
- frexpl(), frexp, frexpf - extract mantissa and exponent from a double precision number
- fscanf(), scanf, sscanf - convert formatted input
- fseek(), fseeko - reposition a file-position indicator in a stream
- fseeko(), fseek - reposition a file-position indicator in a stream
- fsetpos() - set current file position
- fstat() - get file status
- fstatat(), lstat, stat - get file status
- fstatvfs(), statvfs - get file system information
- fsync() - synchronize changes to a file
- ftell(), ftello - return a file offset in a stream
- ftello(), ftell - return a file offset in a stream
- ftok() - generate an IPC key
- ftruncate() - truncate a file to a specified length
- ftrylockfile(), flockfile, funlockfile - stdio locking functions
- ftw() - traverse (walk) a file tree
- ftw.h - file tree traversal
- funlockfile(), flockfile, ftrylockfile - stdio locking functions
- fuser - list process IDs of all processes that have one or more files open
- futimens(), utimensat, utimes - set file access and modification times
- fwide() - set stream orientation
- fwprintf(), swprintf, wprintf - print formatted wide-character output
- fwrite() - binary output
- fwscanf(), swscanf, wscanf - convert formatted wide-character input

Topics

- Feature Test Macro
- Field
- FIFO Special File (or FIFO)
- File Access Permissions
- File Description
- File Descriptor
- File Format Notation
- File Group Class
- File Hierarchy
- File Mode Bits
- File Mode
- File Offset
- File Other Class
- File Owner Class
- File Permission Bits
- File Serial Number
- File System
- File Times Update
- File Type
- File
- Filename Portability
- Filename String
- Filename
- Filenames
- Filter
- First Open (of a File)
- Flow Control
- Foreground Job
- Foreground Process Group (or Foreground Job)
- Foreground Process Group ID
- Foreground Process
- Form-Feed Character (<form-feed>)