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| From | John Gordon <gordon@panix.com> |
|---|---|
| Newsgroups | comp.lang.c |
| Subject | Re: Fread problem |
| Date | 2011-07-15 21:43 +0000 |
| Organization | PANIX Public Access Internet and UNIX, NYC |
| Message-ID | <ivqcap$eqo$1@reader1.panix.com> (permalink) |
| References | <ivq9i7$841$1@speranza.aioe.org> |
In <ivq9i7$841$1@speranza.aioe.org> Jack <spamtrap@trashcan.invalid> writes:
> I got a strange problem with Fread:
> It crashes my program from time to time, in one of its internal memcpy
> calls.
When things like this happen it is nearly always because of a memory
corruption bug elsewhere in your program, not because of a bug in a
library function like fread().
C is, unfortunately, a fragile language. If you copy more to a buffer
than it can hold, or call free() on a bad value, or call free() twice on
the same value, you've just corrupted the memory space of your program and
anything can happen from that point onward, including crashes in library
functions such as fread().
If your program is a simple one, go over it again and try to identify any
areas where you might have committed the above errors. If it's a complex
program, you might use a memory analyzer such as efence or valgrind.
--
John Gordon A is for Amy, who fell down the stairs
gordon@panix.com B is for Basil, assaulted by bears
-- Edward Gorey, "The Gashlycrumb Tinies"
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Fread problem Jack <spamtrap@trashcan.invalid> - 2011-07-15 20:56 +0000
Re: Fread problem Ian Collins <ian-news@hotmail.com> - 2011-07-16 09:05 +1200
Re: Fread problem Noob <root@127.0.0.1> - 2011-07-19 13:41 +0200
Re: Fread problem John Gordon <gordon@panix.com> - 2011-07-15 21:43 +0000
Re: Fread problem Jack <spamtrap@trashcan.invalid> - 2011-07-16 09:22 +0000
Re: Fread problem Dr Nick <3-nospam@temporary-address.org.uk> - 2011-07-16 10:25 +0100
Re: Fread problem Jack <spamtrap@trashcan.invalid> - 2011-07-16 20:23 +0000
Re: Fread problem Ian Collins <ian-news@hotmail.com> - 2011-07-17 08:37 +1200
Re: Fread problem John Gordon <gordon@panix.com> - 2011-07-16 20:46 +0000
Re: Fread problem James Kuyper <jameskuyper@verizon.net> - 2011-07-16 18:29 -0400
Re: Fread problem John Gordon <gordon@panix.com> - 2011-07-16 23:14 +0000
Re: Fread problem Eric Sosman <esosman@ieee-dot-org.invalid> - 2011-07-16 16:55 -0400
Re: Fread problem blmblm@myrealbox.com <blmblm.myrealbox@gmail.com> - 2011-07-19 17:17 +0000
[OT] Re: Fread problem Eric Sosman <esosman@ieee-dot-org.invalid> - 2011-07-19 20:11 -0400
Re: [OT] Re: Fread problem Seebs <usenet-nospam@seebs.net> - 2011-07-20 02:27 +0000
Re: Fread problem Joe Pfeiffer <pfeiffer@cs.nmsu.edu> - 2011-07-16 14:57 -0600
Re: Fread problem Jack <spamtrap@trashcan.invalid> - 2011-07-17 20:45 +0000
Re: Fread problem Ian Collins <ian-news@hotmail.com> - 2011-07-18 08:50 +1200
Re: Fread problem James Kuyper <jameskuyper@verizon.net> - 2011-07-17 17:06 -0400
Re: Fread problem Ian Collins <ian-news@hotmail.com> - 2011-07-18 09:09 +1200
Re: Fread problem Hans Vlems <hvlems@freenet.de> - 2011-07-18 13:01 -0700
Re: Fread problem Joe Pfeiffer <pfeiffer@cs.nmsu.edu> - 2011-07-17 16:06 -0600
Re: Fread problem Geoff <geoff@invalid.invalid> - 2011-07-17 17:56 -0700
Re: Fread problem Seebs <usenet-nospam@seebs.net> - 2011-07-18 04:08 +0000
Re: Fread problem Geoff <geoff@invalid.invalid> - 2011-07-17 22:08 -0700
Re: Fread problem Jack <spamtrap@trashcan.invalid> - 2011-07-18 20:20 +0000
Re: Fread problem Ian Collins <ian-news@hotmail.com> - 2011-07-19 08:50 +1200
Re: Fread problem Cat 22 <cat22@invalid.org> - 2011-07-18 18:34 -0700
Re: Fread problem James Kuyper <jameskuyper@verizon.net> - 2011-07-19 07:19 -0400
Re: Fread problem Stephen Sprunk <stephen@sprunk.org> - 2011-07-19 09:31 -0500
Re: Fread problem Todd Carnes <toddcarnes@gmail.com> - 2011-07-18 04:23 +0000
Re: Fread problem Nick Keighley <nick_keighley_nospam@hotmail.com> - 2011-07-18 01:15 -0700
Re: Fread problem Eric Sosman <esosman@ieee-dot-org.invalid> - 2011-07-18 07:22 -0400
Re: Fread problem Kenneth Brody <kenbrody@spamcop.net> - 2011-07-18 13:56 -0400
Re: Fread problem Kenneth Brody <kenbrody@spamcop.net> - 2011-07-18 13:49 -0400
Re: Fread problem Eric Sosman <esosman@ieee-dot-org.invalid> - 2011-07-18 20:31 -0400
Re: Fread problem Squeamizh <squeamz@hotmail.com> - 2011-07-18 21:11 -0700
Re: Fread problem blmblm@myrealbox.com <blmblm.myrealbox@gmail.com> - 2011-07-19 17:19 +0000
Re: Fread problem Kenneth Brody <kenbrody@spamcop.net> - 2011-07-19 14:18 -0400
Re: Fread problem pete <pfiland@mindspring.com> - 2011-07-19 15:19 -0400
Re: Fread problem blmblm@myrealbox.com <blmblm.myrealbox@gmail.com> - 2011-07-19 21:33 +0000
Re: Fread problem Geoff <geoff@invalid.invalid> - 2011-07-16 14:27 -0700
Re: Fread problem John Gordon <gordon@panix.com> - 2011-07-16 22:22 +0000
Re: Fread problem "Kleuskes & Moos" <kleuske@xs4all.nl> - 2011-07-16 23:28 -0700
Re: Fread problem "J. J. Farrell" <jjf@bcs.org.uk> - 2011-07-18 04:58 +0100
Re: Fread problem Keith Thompson <kst-u@mib.org> - 2011-07-18 08:53 -0700
Re: Fread problem Ben Bacarisse <ben.usenet@bsb.me.uk> - 2011-07-18 18:07 +0100
Re: Fread problem Keith Thompson <kst-u@mib.org> - 2011-07-18 12:50 -0700
Re: Fread problem Joe Pfeiffer <pfeiffer@cs.nmsu.edu> - 2011-07-18 12:18 -0600
Re: Fread problem John Gordon <gordon@panix.com> - 2011-07-18 20:18 +0000
Re: Fread problem Keith Thompson <kst-u@mib.org> - 2011-07-18 13:28 -0700
Re: Fread problem Lew Pitcher <lpitcher@teksavvy.com> - 2011-07-18 16:55 -0400
Re: Fread problem Anders Wegge Keller <wegge@wegge.dk> - 2011-07-18 22:51 +0200
Re: Fread problem blmblm@myrealbox.com <blmblm.myrealbox@gmail.com> - 2011-07-19 17:21 +0000
Re: Fread problem Kenneth Brody <kenbrody@spamcop.net> - 2011-07-18 13:44 -0400
Re: Fread problem Ian Collins <ian-news@hotmail.com> - 2011-07-16 21:39 +1200
Re: Fread problem Joe Pfeiffer <pfeiffer@cs.nmsu.edu> - 2011-07-16 12:18 -0600
Re: Fread problem John Gordon <gordon@panix.com> - 2011-07-16 19:36 +0000
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