X-Authentication-Warning: delorie.com: mail set sender to djgpp-bounces using -f From: Rugxulo Newsgroups: comp.os.msdos.djgpp Subject: Re: System() Date: Sat, 5 May 2012 20:10:52 -0700 (PDT) Organization: http://groups.google.com Lines: 36 Message-ID: <1c38ca22-52f5-470e-813f-1af6ed5f21d4@m16g2000yqc.googlegroups.com> References: <92c86f75-e970-4998-94c6-56d6fbf885fe AT e15g2000vba DOT googlegroups DOT com> NNTP-Posting-Host: 65.13.115.246 Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 X-Trace: posting.google.com 1336273852 10876 127.0.0.1 (6 May 2012 03:10:52 GMT) X-Complaints-To: groups-abuse AT google DOT com NNTP-Posting-Date: Sun, 6 May 2012 03:10:52 +0000 (UTC) Complaints-To: groups-abuse AT google DOT com Injection-Info: m16g2000yqc.googlegroups.com; posting-host=65.13.115.246; posting-account=p5rsXQoAAAB8KPnVlgg9E_vlm2dvVhfO User-Agent: G2/1.0 X-HTTP-UserAgent: Mozilla/5.0 (X11; U; Linux i686; en-US) AppleWebKit/534.16 (KHTML, like Gecko) Chrome/10.0.630.0 Safari/534.16,gzip(gfe) Bytes: 2730 To: djgpp AT delorie DOT com DJ-Gateway: from newsgroup comp.os.msdos.djgpp Content-Transfer-Encoding: 8bit X-MIME-Autoconverted: from quoted-printable to 8bit by delorie.com id q463U2cD002494 Reply-To: djgpp AT delorie DOT com Hi, On May 5, 9:52 am, Georg wrote: > > I wonder if it would be possible to write something like Norton/Volkov/ > Midnight commander in djgpp. There may have been a really old port of it, but I never found or used it. Though you can instead try Ytree (has DJGPP support), but IIRC even it doesn't fully work (reading archives fails due to fork() failure): http://www.han.de/~werner/ytree.html > When I select an executable file on the screen I would like to execute > that. However, e.g. system("command.com") will take quite a chunk of > the available memory in real mode. I believe you can just do system(""); and it will work. (Not sure if you're shelling out yet another shell unnecessarily or not.) Assuming you're using an XMS_Swap variant of FreeCOM and EMM386 and LH CWSDPMI, it shouldn't be too much used. But you could also try using "HDPMI32 - r" instead. I don't know which is leaner, and perhaps CWSDPMI uses more low RAM due to page tables. BTW, you could also used "stubedit" to shrink your transfer buffer to save a few kb. > What could be done to execute the selected program with as much memory > as possible? And return to the commander when this program terminates? Dunno. I think most shells and file managers have a very very tiny .ASM stub file that runs the main program, exits that when something external is run, and somehow jumps back to the tiny .ASM starter. See Doszip sources (not DJGPP-based, though) if you're curious: http://sourceforge.net/projects/doszip/