sunos man page for fd

Query: fd

OS: sunos

Section: 4

Format: Original Unix Latex Style Formatted with HTML and a Horizontal Scroll Bar

fd(4)								   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 origi- nal file descriptor allows the operations. 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 3 Jul 1990 fd(4)
Related Man Pages
fdescfs(5) - freebsd
dup(2) - opensolaris
dup(2) - hpux
stderr(4) - debian
mount_fdesc(8) - opendarwin
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