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From:Derick H Siddoway Date:March 22 1999 7:36pm
Subject:Re: Why the error here?
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Ah, well.  I (perhaps foolishly) assumed that the problem
would be with the API, not basic C.

(Although I did wonder why anyone would use scanf()...)

When I type it in, I don't get a segfault at all -- wonder


From: on 03/22/99 10:21 AM
To:	Derick H Siddoway/TC/TRS/American Express@AMEX
Subject:	Re: Why the error here?

Derick H Siddoway wrote:
> You're calling mysql_free_result() on a pointer that has never
> been used or initialized.  That is, why call mysql_free_result()
> when you've never called mysql_store_result()?
> --
> derick

This segfaults though before the program gets to any of
the mysql calls. sscanf will fail with a segfault as it
is trying to store a string at the address of something
that was supposed to be a character, and will most
likely address something outside of the allowed limits

> From: on 03/21/99 08:21 PM
> To:
> cc:      (bcc: Derick H Siddoway/TC/TRS/American Express)
> Subject:        Why the error here?
> Hello,
> I am trying to use:
> mysql_create_db in a C program.  It compiles and links OK.  But when you
> execute the program, I get the following error.
> #include "mysql.h"
> #include "mysql.h"
> #include <stdio.h>
> #include <stdlib.h>
> MYSQL mysql;
> MYSQL_RES *res;
> MYSQL_ROW row;
> char *db = "db";
> void exiterr(int exitcode)
> {
> fprintf( stderr, "%s\n", mysql_error(&mysql) ); exit( exitcode );
> }
> main()
> {
> char db;
> printf("Enter a name for your new database\n\n"); scanf("%s", &db);
> if (!(mysql_connect(&mysql,"localhost","root",""))) exiterr(1);
> if (mysql_create_db(&mysql, &db))
> exiterr(2);
> mysql_free_result(res);
> mysql_close(&mysql);
> }
> When I run my code here is what I get:
> [root@oscar mysql_c]# ./connect
> Enter a name for your new database
> homes
> Segmentation fault
> BUT....  The database is added to mysql.  I can connect to it, and view the
> "empty set".  Why the segmentation fault???
> Thank you in andvance.
> Tom Bedell
> Tom@stripped

Sasha Pachev (home) (work)

Why the error here?Thomas R. Bedell22 Mar
  • Re: Why the error here?Thimble Smith22 Mar
RE: Why the error here?Thomas R. Bedell22 Mar
Re: Why the error here?Derick H Siddoway22 Mar
Re: Why the error here?Sasha Pachev22 Mar
Re: Why the error here?Derick H Siddoway22 Mar