Solved

Command Line Overflow

Posted on 1998-04-24
3
177 Views
Last Modified: 2013-11-19
All,

The project I'm working on (Win NT 4.0 SP3, VC++ 5.0) has for various reasons, a need to spawn a separate program from within our own.
When we spawn the program we get a command line overflow at about the 150th character. 150 characters sounds like a lot until you start referring to multiple files with their full path.

Unfortunately, we can't just wrap the spawned program's inputs into a file, because it's 3rd party.
We thought about kludging a hack were we put everything in the same directory temporarily, but aren't really satisfied with that.

So,
a) Can we increase the command line length? (and How?)
b) Can we avoid the command line length issue altogether (without using argument files)?
c) What is the actual command line length (154 seems like a very strange number for it to be...)?

Thanks in advance for any help you can give...

meehanj
0
Comment
Question by:meehanj
3 Comments
 
LVL 6

Expert Comment

by:jpk041897
ID: 1302109
Actualy the max command line length for DOS IS 154 characters and it affect Win95 and NT also.

You cannot easily increase the 154 character limit, I.e: without overriding command.com entierly. There are a few shareware programs like 4DOS (which you can download at http://www.shareware,com) that increase this size to 255 characters.

But even with this increase, if at all possible, your best workarrounds are usualy to dinamically change directoris to the intended PATH and then open the file.

0
 

Author Comment

by:meehanj
ID: 1302110
Continuing :
Would ShellExecute() instead of spawn*() gain us anything?
0
 

Accepted Solution

by:
footloose earned 70 total points
ID: 1302111
Do you need to give absolute paths in the commandline ? If the third party application searches the current directory first (by default), then you should try putting all (or atleast some of) the necessary files in one directory, switch to that directory and then spawn the application.

Another kludge is to reduce the length of the directory names in the paths. See if you can specify file paths relative to a single parent directory, and not necessarily from the drive letter.
0

Featured Post

Free Tool: Path Explorer

An intuitive utility to help find the CSS path to UI elements on a webpage. These paths are used frequently in a variety of front-end development and QA automation tasks.

One of a set of tools we're offering as a way of saying thank you for being a part of the community.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

Title # Comments Views Activity
function returning CString in a regular win32 DLL 8 200
Process filename extension 3 208
sameEnds challenge 3 187
How to convert MFC::CString to UTF8 wchar_t* 10 371
Introduction: Displaying information on the statusbar.   Continuing from the third article about sudoku.   Open the project in visual studio. Status bar – let’s display the timestamp there.  We need to get the timestamp from the document s…
Introduction: Finishing the grid – keyboard support for arrow keys to manoeuvre, entering the numbers.  The PreTranslateMessage function is to be used to intercept and respond to keyboard events. Continuing from the fourth article about sudoku. …
This video will show you how to get GIT to work in Eclipse.   It will walk you through how to install the EGit plugin in eclipse and how to checkout an existing repository.
Finds all prime numbers in a range requested and places them in a public primes() array. I've demostrated a template size of 30 (2 * 3 * 5) but larger templates can be built such 210  (2 * 3 * 5 * 7) or 2310  (2 * 3 * 5 * 7 * 11). The larger templa…

740 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question