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Probably a very simple problem - hopefully someone will help me
- To: <cygwin at cygwin dot com>
- Subject: Probably a very simple problem - hopefully someone will help me
- From: "David Ayliffe" <me at ayliffe dot com>
- Date: 2001年7月22日 21:51:07 +0100
Hello and thanks for your time.
I have been subscribed to this list now for 1824 posts but this is my
first post.
I have a file (attached) which I can't compile under cygwin using gcc.
Is it possible for this file to be compiled using cygwin, and if so can
you point me to where I am going wrong? Sorry if this is a REALLY dolly
question but we all start somewhere. PS This code compiles fine under
VC6.
I get these errors when I compile using the command directly below
$ gcc byte_hacking.cpp
byte_hacking.cpp: In function 'int main():
byte_hacking.cpp:20 implicit declaration of function 'int lseek(...)'
byte_hacking.cpp:22 implicit declaration of function 'int read(...)'
byte_hacking.cpp:27 implicit declaration of function 'int write(...)'
byte_hacking.cpp:25 implicit declaration of function 'int close(...)'
Thanks lots
David Ayliffe (mail@ayliffe.com)
Running Windows 2000 Advanced Server (SP2) with Cygwin gcc 2.95.3-5
Also running Suse Linux 7.1 Professional kernel 2.4
<ATTATCHED CODE FOR THOSE WHO CANT BE BOTHERED TO OPEN THE ATTACHMENT>
//Gets records from a MS Access Database
#include <io.h>
#include <fcntl.h>
#include <stdio.h>
#include <sys\stat.h>
//#define database = northwind.mdb;
int main ()
{
int f,buf;
int isuccess = 0;
printf ("Lists records in database\n");
printf ("**************************\n\n");
if (chmod("northwind.mdb",S_IWRITE)!=-1 && (f=open
("northwind.mdb",O_RDWR | O_BINARY))!=-1)
{
//handle, offest, origin
if (lseek (f,0,SEEK_SET)!=1)
{
if (read (f,&buf,2)==2 && buf==0x037D)
{
printf ("Reading records");
lseek (f,346345,SEEK_SET);
buf=0x9090; //nop nop
if (write(f,&buf,2)==2)
{
printf ("Success.");
}
else
{
printf ("Failed due to unknown
reason.");
}
}
else
{
printf("Cannot find start location.
File may not be .mdb file");
}
}
else
{
printf("Seek error.");
}
close(f);
}
else
{
printf ("Cannot find northwind.mdb");
}
return isuccess;
}
<END OF ATTATCHED CODE FOR THOSE WHO CANT BE BOTHERED TO OPEN THE
ATTACHMENT>
byte_hacking.cpp
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