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| author | Guido van Rossum <guido@python.org> | 1996-06-26 19:20:33 (GMT) |
|---|---|---|
| committer | Guido van Rossum <guido@python.org> | 1996-06-26 19:20:33 (GMT) |
| commit | 50ec5c074ab23fe0fc67915a7c3208faaf8d61d7 (patch) | |
| tree | a82e8affc5870f64d5a643e159f73affc3922108 /Doc/lib | |
| parent | 164c36b6c3f2eccd0f78cbf8755194c75693196f (diff) | |
| download | cpython-50ec5c074ab23fe0fc67915a7c3208faaf8d61d7.zip cpython-50ec5c074ab23fe0fc67915a7c3208faaf8d61d7.tar.gz cpython-50ec5c074ab23fe0fc67915a7c3208faaf8d61d7.tar.bz2 | |
Add flock; warn about lockdata system dependency when using fcntl.
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. |