Index for Section 3

Alphabetical listing for F

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fileno(3)
NAME
  fileno - Map a stream pointer to a file descriptor

SYNOPSIS
  #include <stdio.h>

  int fileno(
	   FILE *stream );

LIBRARY
  Standard C Library (libc)

STANDARDS
  Interfaces documented on this reference page conform to industry standards
  as follows:

  fileno(): XSH5.0

  Refer to the standards(5) reference page for more information about
  industry standards and associated tags.

PARAMETERS
  stream
      Specifies the input stream.

DESCRIPTION
  The fileno() function returns the integer file descriptor associated with
  the stream pointed to by stream.

NOTES
  [Tru64 UNIX]	The fileno() function may be a macro (depending on the
  compile-time definitions used in the source). Consequently, you cannot use
  this interface where a function is necessary; for example, a subroutine
  pointer cannot point to the interface.

RETURN VALUES
  Upon successful completion, the fileno() macro returns the integer value of
  the file descriptor associated with the stream parameter. Otherwise, the
  value -1 is returned.

SEE ALSO
  Functions: open(2), clearerr(3), fdopen(3), feof(3), ferror(3), fopen(3)

  Standards: standards(5)

Index for Section 3

Alphabetical listing for F

Top of page