.TH FILENO 3 2021-03-22 "" "Linux Programmer's Manual"
.SH NAME
fileno \- obtain file descriptor of a stdio stream
+.SH LIBRARY
+Standard C library
+.RI ( libc ", " \-lc )
.SH SYNOPSIS
.nf
.B #include <stdio.h>
.TH FLOCKFILE 3 2021-03-22 "" "Linux Programmer's Manual"
.SH NAME
flockfile, ftrylockfile, funlockfile \- lock FILE for stdio
+.SH LIBRARY
+Standard C library
+.RI ( libc ", " \-lc )
.SH SYNOPSIS
.nf
.B #include <stdio.h>
.TH FMEMOPEN 3 2021-03-22 "GNU" "Linux Programmer's Manual"
.SH NAME
fmemopen \- open memory as stream
+.SH LIBRARY
+Standard C library
+.RI ( libc ", " \-lc )
.SH SYNOPSIS
.nf
.B #include <stdio.h>
.TH FMTMSG 3 2021-03-22 "" "Linux Programmer's Manual"
.SH NAME
fmtmsg \- print formatted error messages
+.SH LIBRARY
+Standard C library
+.RI ( libc ", " \-lc )
.SH SYNOPSIS
.nf
.B #include <fmtmsg.h>
.TH FNMATCH 3 2021-03-22 "GNU" "Linux Programmer's Manual"
.SH NAME
fnmatch \- match filename or pathname
+.SH LIBRARY
+Standard C library
+.RI ( libc ", " \-lc )
.SH SYNOPSIS
.nf
.B #include <fnmatch.h>
.TH FOPEN 3 2021-03-22 "GNU" "Linux Programmer's Manual"
.SH NAME
fopen, fdopen, freopen \- stream open functions
+.SH LIBRARY
+Standard C library
+.RI ( libc ", " \-lc )
.SH SYNOPSIS
.nf
.B #include <stdio.h>
.TH FOPENCOOKIE 3 2021-03-22 "Linux" "Linux Programmer's Manual"
.SH NAME
fopencookie \- opening a custom stream
+.SH LIBRARY
+Standard C library
+.RI ( libc ", " \-lc )
.SH SYNOPSIS
.nf
.BR "#define _GNU_SOURCE" " /* See feature_test_macros(7) */"
.TH FPATHCONF 3 2021-03-22 "GNU" "Linux Programmer's Manual"
.SH NAME
fpathconf, pathconf \- get configuration values for files
+.SH LIBRARY
+Standard C library
+.RI ( libc ", " \-lc )
.SH SYNOPSIS
.nf
.B #include <unistd.h>
.TH FPURGE 3 2021-03-22 "" "Linux Programmer's Manual"
.SH NAME
fpurge, __fpurge \- purge a stream
+.SH LIBRARY
+Standard C library
+.RI ( libc ", " \-lc )
.SH SYNOPSIS
.nf
/* unsupported */
.TH FPUTWC 3 2021-03-22 "GNU" "Linux Programmer's Manual"
.SH NAME
fputwc, putwc \- write a wide character to a FILE stream
+.SH LIBRARY
+Standard C library
+.RI ( libc ", " \-lc )
.SH SYNOPSIS
.nf
.B #include <stdio.h>
.TH FPUTWS 3 2021-03-22 "GNU" "Linux Programmer's Manual"
.SH NAME
fputws \- write a wide-character string to a FILE stream
+.SH LIBRARY
+Standard C library
+.RI ( libc ", " \-lc )
.SH SYNOPSIS
.nf
.B #include <wchar.h>
.TH FREAD 3 2021-03-22 "GNU" "Linux Programmer's Manual"
.SH NAME
fread, fwrite \- binary stream input/output
+.SH LIBRARY
+Standard C library
+.RI ( libc ", " \-lc )
.SH SYNOPSIS
.nf
.B #include <stdio.h>
.TH FSEEK 3 2021-03-22 "GNU" "Linux Programmer's Manual"
.SH NAME
fgetpos, fseek, fsetpos, ftell, rewind \- reposition a stream
+.SH LIBRARY
+Standard C library
+.RI ( libc ", " \-lc )
.SH SYNOPSIS
.nf
.B #include <stdio.h>
.TH FSEEKO 3 2021-03-22 "" "Linux Programmer's Manual"
.SH NAME
fseeko, ftello \- seek to or report file position
+.SH LIBRARY
+Standard C library
+.RI ( libc ", " \-lc )
.SH SYNOPSIS
.nf
.B #include <stdio.h>
.TH FTIME 3 2021-03-22 "GNU" "Linux Programmer's Manual"
.SH NAME
ftime \- return date and time
+.SH LIBRARY
+Standard C library
+.RI ( libc ", " \-lc )
.SH SYNOPSIS
.nf
.B "#include <sys/timeb.h>"
.TH FTOK 3 2021-03-22 "GNU" "Linux Programmer's Manual"
.SH NAME
ftok \- convert a pathname and a project identifier to a System V IPC key
+.SH LIBRARY
+Standard C library
+.RI ( libc ", " \-lc )
.SH SYNOPSIS
.nf
.B #include <sys/ipc.h>
.SH NAME
fts, fts_open, fts_read, fts_children, fts_set, fts_close \- \
traverse a file hierarchy
+.SH LIBRARY
+Standard C library
+.RI ( libc ", " \-lc )
.SH SYNOPSIS
.nf
.B #include <sys/types.h>
.TH FTW 3 2021-03-22 "Linux" "Linux Programmer's Manual"
.SH NAME
ftw, nftw \- file tree walk
+.SH LIBRARY
+Standard C library
+.RI ( libc ", " \-lc )
.SH SYNOPSIS
.nf
.B #include <ftw.h>
.TH FUTIMES 3 2021-03-22 "Linux" "Linux Programmer's Manual"
.SH NAME
futimes, lutimes \- change file timestamps
+.SH LIBRARY
+Standard C library
+.RI ( libc ", " \-lc )
.SH SYNOPSIS
.nf
.B #include <sys/time.h>
.TH FWIDE 3 2021-03-22 "GNU" "Linux Programmer's Manual"
.SH NAME
fwide \- set and determine the orientation of a FILE stream
+.SH LIBRARY
+Standard C library
+.RI ( libc ", " \-lc )
.SH SYNOPSIS
.nf
.B #include <wchar.h>
.TH GCVT 3 2021-03-22 "" "Linux Programmer's Manual"
.SH NAME
gcvt \- convert a floating-point number to a string
+.SH LIBRARY
+Standard C library
+.RI ( libc ", " \-lc )
.SH SYNOPSIS
.nf
.B #include <stdlib.h>
.SH NAME
getaddrinfo, freeaddrinfo, gai_strerror \- network address and
service translation
+.SH LIBRARY
+Standard C library
+.RI ( libc ", " \-lc )
.SH SYNOPSIS
.nf
.B #include <sys/types.h>
.TH GETAUXVAL 3 2021-08-27 "GNU" "Linux Programmer's Manual"
.SH NAME
getauxval \- retrieve a value from the auxiliary vector
+.SH LIBRARY
+Standard C library
+.RI ( libc ", " \-lc )
.SH SYNOPSIS
.nf
.B #include <sys/auxv.h>
.TH GETCONTEXT 3 2021-03-22 "Linux" "Linux Programmer's Manual"
.SH NAME
getcontext, setcontext \- get or set the user context
+.SH LIBRARY
+Standard C library
+.RI ( libc ", " \-lc )
.SH SYNOPSIS
.nf
.B #include <ucontext.h>
.TH GETCWD 3 2021-03-22 "GNU" "Linux Programmer's Manual"
.SH NAME
getcwd, getwd, get_current_dir_name \- get current working directory
+.SH LIBRARY
+Standard C library
+.RI ( libc ", " \-lc )
.SH SYNOPSIS
.nf
.B #include <unistd.h>