diff options
Diffstat (limited to 'Doc/lib')
| -rw-r--r-- | Doc/lib/libfcntl.tex | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/Doc/lib/libfcntl.tex b/Doc/lib/libfcntl.tex index 8539e2a..1aba520 100644 --- a/Doc/lib/libfcntl.tex +++ b/Doc/lib/libfcntl.tex @@ -36,6 +36,12 @@ The module defines the following functions: \code{IOCTL}. \end{funcdesc} +\begin{funcdesc}{flock}{fd\, op} +Perform the lock operation \var{op} on file descriptor \var{fd}. +See the Unix manual for details. (On some systems, this function is +emulated using \code{fcntl}.) +\end{funcdesc} + If the library modules \code{FCNTL} or \code{IOCTL} are missing, you can find the opcodes in the C include files \code{sys/fcntl} and \code{sys/ioctl}. You can create the modules yourself with the h2py @@ -57,4 +63,6 @@ rv = fcntl(file.fileno(), FCNTL.F_SETLKW, lockdata) Note that in the first example the return value variable \code{rv} will hold an integer value; in the second example it will hold a string -value. +value. The structure lay-out for the \var{lockadata} variable is +system dependent -- therefore using the \code{flock()} call may be +better. |