HP 3000 Manuals HP 3000 Manuals
fileno
Maps a stream pointer to a file descriptor.
Syntax
#include <stdio.h>
int fileno (FILE *stream);
Parameters
stream A pointer to an open stream.
Return Values
>=0 An open file descriptor associated with stream.
Description
The fileno function returns the file descriptor associated with stream.
The following symbolic values, located in <unistd.h>, define the file
descriptors associated with stdin, stdout, and stderr streams when the
application is started:
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| File Descriptor | Stream Description | Value |
| Symbolic Value | | |
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- STDIN_FILENO - Standard input stream stdin - 0 -
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- STDOUT_FILENO - Standard output stream stdout - 1 -
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- STDERR_FILENO - Standard error stream stderr - 2 -
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This routine is implemented as a macro in <stdio.h> and as a function.
See Also
fdopen(), open(), POSIX.1 8.2.1