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File Formats fd(4)
NAME
fd - file descriptor files
DESCRIPTION
These files, conventionally called /dev/fd/0, /dev/fd/1,
/dev/fd/2, and so on, refer to files accessible through file
descriptors. If file descriptor n is open, these two system
calls have the same effect:
fd = open("/dev/fd/n",mode);
fd = dup(n);
On these files creat(2) is equivalent to open, and mode is
ignored. As with dup, subsequent reads or writes on fd
fail unless the original file descriptor allows the opera-
tions.
For convenience in referring to standard input, standard
output, and standard error, an additional set of names is
provided: /dev/stdin is a synonym for /dev/fd/0,
/dev/stdout for /dev/fd/1, and /dev/stderr for /dev/fd/2.
SEE ALSO
creat(2), dup(2), open(2)
DIAGNOSTICS
open(2) returns -1 and EBADF if the associated file
descriptor is not open.
SunOS 5.10 Last change: 3 Jul 1990 1
Man(1) output converted with
man2html and wrapped by fishsponge
This page was generated on Wed Sep 12 21:37:33 GMT 2007
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