Some macros missing

dlinux · 04-28-2009, 11:13 AM

Hello, when trying to use the major(3) and minor(3) macros, gcc does not find them, i have to use the gnu_dev_* aliases.
I just wanted to know if this is some problem on my system or if it's a slack issue.

rg3 · 04-28-2009, 03:08 PM

Works for me.

Code:

#define _BSD_SOURCE
#include <stdio.h>
#include <sys/types.h>

int main()
{
	dev_t foo = makedev(10, 10);
	printf("Major: %d\nMinor: %d\n", major(foo), minor(foo));
	return 0;
}

By the way, there's a typo in the manpage for makedev, major and minor. The words "#include" and "#define" are swapped. Maybe the man-pages package maintainer could report it upstream if it's not fixed yet.

Edit: It's present in upstream, verified at: http://www.kernel.org/doc/man-pages/...makedev.3.html

I'll email Michael Kerrisk myself.

dlinux · 04-29-2009, 08:49 AM

Quote:

Originally Posted by rg3

Works for me.

Code:

#define _BSD_SOURCE
#include <stdio.h>
#include <sys/types.h>

int main()
{
	dev_t foo = makedev(10, 10);
	printf("Major: %d\nMinor: %d\n", major(foo), minor(foo));
	return 0;
}

By the way, there's a typo in the manpage for makedev, major and minor. The words "#include" and "#define" are swapped. Maybe the man-pages package maintainer could report it upstream if it's not fixed yet.

Edit: It's present in upstream, verified at: http://www.kernel.org/doc/man-pages/...makedev.3.html

I'll email Michael Kerrisk myself.

Thanks for the reply.
The problem was one of my include files.
I saw that typo and reported it before creating this thread, but i guess two e-mails won't hurt.