Hi Carl,
The theoretical maximum length of long filenames (LFN) is 255. But the DOS
Program Segment Prefix (PSP) which stores the command line argument has a
maximum of 127 characters. This cannot be changed since it is defined this way.
However, 4DOS internal commands (DIR, COPY, ECHO, etc) are not affected by
this, so the 127-character limitation only applies to the arguments of external
commands.
Wengier
On Wednesday, June 15, 2016 7:57 PM, Carl Distefano <cld@xxxxxxxxxx> wrote:
Wengier or anyone familiar with 4DOS, do you know what the maximum
length of a long filename is?
I have been using Wengier's start.exe to open various PDFs with long
filenames. When I tried opening one whose name had 146 characters,
nothing happened. If I give the same command in a CMD.EXE window, the
file opens. I'm assuming that the difference is that the maximum
filename length is shorter in 4DOS than it is in Windows. I tried to
find the answer in the help facility and on various 4DOS sites, but
came up short.
The workaround in a 4DOS batch file, by the way, is to use the SFN
"variable function":
start.exe %@SFN["really long file name"]
--
Carl Distefano
cld@xxxxxxxxxx
