12-08-2003
Empty files are sometimes used as flag files for other processes - though IPC could always be employed.
Other programs use them to mark certain conditions - a good example would be Big Brother's acknowledgment files. It has also been employed in the past for high availability packages to mark conditions know to the SA that shouldn't force a switch.
What prompts the question?
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MWRITE(1) General Commands Manual MWRITE(1)
NAME
mwrite - low level write (copy) a Unix file to MSDOS
SYNOPSIS
mwrite [ -tnvm ] unixfile msdosfile
mwrite [ -tnvm ] unixfile [ unixfiles... ] msdosdirectory
DESCRIPTION
In the first form, mwrite copies the specified Unix file to the named MSDOS file. The second form of the command copies multiple Unix
files to the named MSDOS directory.
Mwrite will allow the following command line options:
t Text file transfer. Mwrite will translate incoming line feeds to carriage return/line feeds.
n No warning. Mwrite will not warn the user when overwriting an existing file.
v Verbose mode. Display the new filename if the Unix filename requires conversion.
m Preserve the file modification times.
If the target file already exists, and the -n option is not in effect, mwrite asks whether or not to overwrite the file.
Reasonable care is taken to create a valid MSDOS filename. If an invalid name is specified, mwrite will change the name (and display the
new name if the verbose mode is set).
MSDOS subdirectory names are are supported with either the '/' or '' separator. The use of the '' separator or wildcards will require
the names to be enclosed in quotes to protect them from the shell.
The mcd command may be used to establish the device and the current working directory (relative to MSDOS), otherwise the default is A:/.
SEE ALSO
mcd(1), mcopy(1), mread(1)
BUGS
Unlike MSDOS, the destination directory may not be omitted.
local MWRITE(1)