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Programming > C > Re: Issue with ...
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Re: Issue with memory allocation and file reading

by paragon.john@[EMAIL PROTECTED] May 6, 2008 at 01:35 PM

On May 6, 3:09 pm, paragon.j...@[EMAIL PROTECTED]
 wrote:
> Hello all,
>
> I am trying to read a file into some allocated memory as part of a
> program and I am running into a problem.  The program gets a
> segmentation fault during fread.  I have previously used this code on
> 64-bit RHEL4 without any problems but I am not having this issue on 32-
> bit RHEL5.  I have simplified the code to it's most basic form and I
> am still seeing the issue.  Below is a full program that causes the
> error.  If anybody knows what may be causing the problem, help would
> be greatly appreciated....
>
> #include <stdio.h>
> #include <fcntl.h>
>
> int main()
> {
>      int data_size = 1024*1024;
>      u_char *data_buf;
>      FILE *data_file;
>      int data_num;
>
>      data_buf = (unsigned char *) valloc(data_size);
>      printf("Memory allocated.\n");
>      data_file = fopen("data_file","rb");
>      printf("File opened.");
>      data_num = fread(data_buf, sizeof(u_char), data_size, data_file);
>      printf("File read.");
>      return 0;
>
> }
>
> Thanks for your help!

Thank you for the help guys.  I've figured it out.  I feel dumb for
not checking the return values on the functions.
 




 6 Posts in Topic:
Issue with memory allocation and file reading
paragon.john@[EMAIL PROTE  2008-05-06 12:09:56 
Re: Issue with memory allocation and file reading
jt@[EMAIL PROTECTED] (Je  2008-05-06 19:33:46 
Re: Issue with memory allocation and file reading
viza <tom.viza@[EMAIL   2008-05-06 13:24:35 
Re: Issue with memory allocation and file reading
paragon.john@[EMAIL PROTE  2008-05-06 13:35:15 
Re: Issue with memory allocation and file reading
CBFalconer <cbfalconer  2008-05-06 20:17:41 
Re: Issue with memory allocation and file reading
Peter Nilsson <airia@[  2008-05-06 20:02:06 

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tan12V112 Wed Jul 9 0:57:31 CDT 2008.