very rusty non-C programmer needs help compiling

[Steven C. Liu]

Hi,

I am trying to compile a C program that I found on the Internet; I want
to use it to spoof my hostid on a Linux box. The code is here:

http://cs1ajb.staff.shef.ac.uk/blog/...cdec4799a85512

When I try to compile, it gives me a syntax error and barfs.

The version of gcc I am using is 3.4.3 on a RHEL AS4-64bit system.

Please email me directly as I do not read Usenet often. I will post a
summary later.

TIA,

Steve

[Ian Collins]

Steven C. Liu wrote:

Hi,

I am trying to compile a C program that I found on the Internet; I want
to use it to spoof my hostid on a Linux box. The code is here:

Linux code questions are better directed to a Linux forum.

>
Please email me directly as I do not read Usenet often. I will post a
summary later.

That's not how Usenet works, you post here, you read here.

--
Ian Collins.

[Keith Thompson]

"Steven C. Liu" <sl**@steven-c-liu.comwrites:

I am trying to compile a C program that I found on the Internet; I
want to use it to spoof my hostid on a Linux box. The code is here:

http://cs1ajb.staff.shef.ac.uk/blog/...cdec4799a85512

When I try to compile, it gives me a syntax error and barfs.

That's because the code has a syntax error.
The declaration in question is:

static inline _syscall3
(int,real_ioctl,int,fd,unsigned int,cmd,unsigned long,arg);

I don't know what "_syscall3" is; it might be some compiler-specific
extension that's not supported by the compiler you're using.

The web page says to use gcc, and you're using a version of gcc.
Perhaps it's no longer supported. You might try asking in
gnu.gcc.help.

--
Keith Thompson (The_Other_Keith) ks***@mib.org <http://www.ghoti.net/~kst>
San Diego Supercomputer Center <* <http://users.sdsc.edu/~kst>
We must do something. This is something. Therefore, we must do this.

[Doug Spencer]

You should probably post the error you're getting. It compiles fine on
GCC 4.04 on Debian 32 bit. I expect it is a 64 bit library issue.

Doug

On Sun, 19 Nov 2006 01:43:46 -0500
"Steven C. Liu" <sl**@steven-c-liu.comwrote:

Hi,

I am trying to compile a C program that I found on the Internet; I want
to use it to spoof my hostid on a Linux box. The code is here:

http://cs1ajb.staff.shef.ac.uk/blog/...cdec4799a85512

When I try to compile, it gives me a syntax error and barfs.

The version of gcc I am using is 3.4.3 on a RHEL AS4-64bit system.

Please email me directly as I do not read Usenet often. I will post a
summary later.

TIA,

Steve

---
For UNIX, Linux and security articles
visit http://SecurityBulletins.com/

[Keith Thompson]

Keith Thompson <ks***@mib.orgwrites:
[...]

I don't know what "_syscall3" is; it might be some compiler-specific
extension that's not supported by the compiler you're using.

The web page says to use gcc, and you're using a version of gcc.
Perhaps it's no longer supported. You might try asking in
gnu.gcc.help.

Or doing a Google search for _syscall3.

--
Keith Thompson (The_Other_Keith) ks***@mib.org <http://www.ghoti.net/~kst>
San Diego Supercomputer Center <* <http://users.sdsc.edu/~kst>
We must do something. This is something. Therefore, we must do this.

[CBFalconer]

"Steven C. Liu" wrote:

>
I am trying to compile a C program that I found on the Internet; I
want to use it to spoof my hostid on a Linux box. The code is here:

http://cs1ajb.staff.shef.ac.uk/blog/...cdec4799a85512

When I try to compile, it gives me a syntax error and barfs.

The version of gcc I am using is 3.4.3 on a RHEL AS4-64bit system.

Please email me directly as I do not read Usenet often. I will post
a summary later.

Of course. We are all anxious to go out and search for some
mysterious code, compile and debug it, with no clue as to what the
problem is. After that we can't wait to send email to some
unknown, who will use it for possibly nefarious purposes, such as
flogging our email addresses to spammers, and who is obviously too
lazy to read usenet. Our ambition is to serve and obey. [1]

On the other hand, you can always hire me at my standard rates to
do that. I suspect others are equally willing. Just be prepared
to pay for at least one days work in advance at approximately $100
per hour. Use certified checks, and wait for them to clear before
expecting any results.

[1] The Humanoids, by Jack Williamson, recently deceased.

--
Chuck F (cbfalconer at maineline dot net)
Available for consulting/temporary embedded and systems.
<http://cbfalconer.home.att.net>

[Random832]

2006-11-19 <ln************@nuthaus.mib.org>,
Keith Thompson wrote:

That's because the code has a syntax error.
The declaration in question is:

static inline _syscall3
(int,real_ioctl,int,fd,unsigned int,cmd,unsigned long,arg);

I don't know what "_syscall3" is; it might be some compiler-specific
extension that's not supported by the compiler you're using.

If I remember linux/glibc correctly, it is a macro. And it is probably
not the source of his problem.

[Steven C. Liu]

Thanks to those who responded constructively. I didn't see a syntax
mistake in the code, and I guess no one else here did either.

The error message is:

"fakeif.c:29: error: syntax error before 'real_ioctl'"

I'll check with a Linux or GCC newsgroup.

Steve

Doug Spencer wrote:

You should probably post the error you're getting. It compiles fine on
GCC 4.04 on Debian 32 bit. I expect it is a 64 bit library issue.

Doug

On Sun, 19 Nov 2006 01:43:46 -0500
"Steven C. Liu" <sl**@steven-c-liu.comwrote:

>Hi,

I am trying to compile a C program that I found on the Internet; I want
to use it to spoof my hostid on a Linux box. The code is here:

http://cs1ajb.staff.shef.ac.uk/blog/...cdec4799a85512

When I try to compile, it gives me a syntax error and barfs.

The version of gcc I am using is 3.4.3 on a RHEL AS4-64bit system.

Please email me directly as I do not read Usenet often. I will post a
summary later.

TIA,

Steve

---
For UNIX, Linux and security articles
visit http://SecurityBulletins.com/

[Keith Thompson]

Random832 <ra****@random.yi.orgwrites:

2006-11-19 <ln************@nuthaus.mib.org>,
Keith Thompson wrote:

>That's because the code has a syntax error.
The declaration in question is:

static inline _syscall3
(int,real_ioctl,int,fd,unsigned int,cmd,unsigned long,arg);

I don't know what "_syscall3" is; it might be some compiler-specific
extension that's not supported by the compiler you're using.

If I remember linux/glibc correctly, it is a macro. And it is probably
not the source of his problem.

Yes, it almost certainly is the source of the problem. When I
compiled the code myself, gcc reported a syntax error on that line.
The first hit on a Google search for "_syscall3" indicates that it
hasn't been supported since 2.6.17 (I think that's the version number
of the Linux kernel).

To the original poster: I suggest asking in a Linux programming
newsgroup. I don't hang out in the comp.os.linux.* and linux.*
hierarchies, so I don't know which would be best.

--
Keith Thompson (The_Other_Keith) ks***@mib.org <http://www.ghoti.net/~kst>
San Diego Supercomputer Center <* <http://users.sdsc.edu/~kst>
We must do something. This is something. Therefore, we must do this.