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Patch #569139: Implementation of major, minor and makedev.

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Martin v. Löwis 2002-10-10 14:27:30 +00:00
parent 3e3e1296f0
commit dbe3f76270
5 changed files with 450 additions and 17 deletions
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31
Doc/lib/libos.tex
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@ -700,13 +700,32 @@ the client opens it for writing. Note that \function{mkfifo()}
doesn't open the FIFO --- it just creates the rendezvous point.
\end{funcdesc}
\begin{funcdesc}{mknod}{path\optional{, mode=0600, major, minor}}
\begin{funcdesc}{mknod}{path\optional{, mode=0600, device}}
Create a filesystem node (file, device special file or named pipe)
named filename. mode specifies both the permissions to use and the
type of node to be created, being combined (bitwise OR) with one of
S_IFREG, S_IFCHR, S_IFBLK, and S_IFIFO (those constants are available
in \module{stat}). For S_IFCHR and S_IFBLK, major and minor define the
newly created device special file, otherwise they are ignored.
named filename. \var{mode} specifies both the permissions to use and
the type of node to be created, being combined (bitwise OR) with one
of S_IFREG, S_IFCHR, S_IFBLK, and S_IFIFO (those constants are
available in \module{stat}). For S_IFCHR and S_IFBLK, \var{device}
defines the newly created device special file (probably using
\function{os.makedev()}), otherwise it is ignored.
\versionadded{2.3}
\end{funcdesc}
\begin{funcdesc}{major}{device}
Extracts a device major number from a raw device number.
\versionadded{2.3}
\end{funcdesc}
\begin{funcdesc}{minor}{device}
Extracts a device minor number from a raw device number.
\versionadded{2.3}
\end{funcdesc}
\begin{funcdesc}{makedev}{major, minor}
Composes a raw device number from the major and minor device numbers.
\versionadded{2.3}
\end{funcdesc}