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Date: | Mon, 12 Dec 94 13:10:42 -0500 |
From: | dj AT stealth DOT ctron DOT com (DJ Delorie) |
To: | IBBT0 AT cc DOT uab DOT es |
Cc: | djgpp AT sun DOT soe DOT clarkson DOT edu |
Subject: | Re: Help about truncating files |
DOS says that if you write zero bytes, the file is truncated where the pointer is. With FILE* streams, this is tricky (because of the caching), but what you can do is this: fflush(f); lseek(fileno(f), POS, 0); write(fileno(f), 0, 0); You should close the file ASAP after this - I've seen DOS get confused when you use this feature.
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