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- Path: sparky!uunet!mcsun!uknet!mucs!mccuts!zlsiial
- From: zlsiial@uts.mcc.ac.uk (A. V. Le Blanc)
- Newsgroups: comp.os.linux
- Subject: Re: mtools, compiling problems
- Message-ID: <5473@mccuts.uts.mcc.ac.uk>
- Date: 30 Jul 92 12:39:43 GMT
- References: <5561@umriscc.isc.umr.edu>
- Organization: Computing Centre, University of Manchester
- Lines: 31
-
- In article <5561@umriscc.isc.umr.edu> dminer@mcs213f.cs.umr.edu (Dan Miner) writes:
- > Well, I finally got around to updating my system. I got
- >bunches of stuff. I have gcc 2.2.2 installed. Now, I'm trying to
- >compile the mtools (the one that is one file for all) and I got
- >a problem. When linking, gcc complains that got_signal isn't there.
-
- The patches which I used to compile the single file mtools in the last
- MCC interim version of Linux can be found at ftp.mcc.ac.uk in mtool205.ud.Z
- in /pub/linux/mcc-interim/0.96c/patches. They do not have this problem.
-
- >Also, gcc complains about gets() in stdio.. saying that you shouldn't
- >use it? Why on earth is that in there? If you have functions that
- >are that unreliable, REMOVE IT! I do believe it is ansi, so why say
- >something like that? *fume*
-
- My patches referred to above in fact change all the gets() calls to
- fgets(). The gets function is inherently dangerous because it makes
- no safety check on the length of the string read; therefore any
- call to gets may cause the program to abort or, worse, overwrite
- other data if the input is longer than the buffer. I suspect the
- ANSI committee would have liked to drop gets, but couldn't give the
- possibilty of dropping it serious consideration because of its
- extensive use in existing programs. The use of gets was one of the
- weaknesses exploited by the renowned Morris Internet Worm. Anyway,
- the GNU C library (to which I think the warning belongs) clearly
- must contain gets to be ANSI, but wishes to discourage you from
- using it. Whether the chosen method is ideal is debatable, and I
- don't know whether you can suppress the warning messages.
-
- -- Owen
- LeBlanc@mcc.ac.uk
-