What it does

This code can be compiled and run on a system to determine variable sizes, the endian-ness of the processor, and effect of converting to network byte order.

Code of value

Endian test, bold printing sample.

Distribution

Code:

   porttool.c (HTML wrapped source)

Package

   porttool-1_0_1.tar.gz (Includes Makefile)

What it does

Sample code that calls gethostbyname() and processes the return hostent structure. This can be compiled and run to diagnose name resolution issues (as it will not go directly to name servers like dig/nslookup does).

Code of value

gethostbyname(), hostent structure, inet_ntop()

Distribution

Code:

   gethostbyname.c (HTML wrapped source)

Package

   gethostbyname-1_0_0.tar.gz (Includes Makefile)

What it does

It is a piece of "demo" code that shows the effects of file locking between two different applications (that in this case is two instances of the same flock program).

Code of value

The differences of the open() call and setting locks between BSD variants and Linux.

Distribution

Code:

   flock.c (HTML wrapped source)

README:

   README (HTML wrapped README)

Package

   flock-1_0_0.tar.gz (Includes Makefile)

What it does

This is a small snippet that creates a pipe, forks, and sends data from the parent to the child through the pipe.

Code of value

Usage of: pipe(), fork(), alarm(), read(), write(), fflush()

Distribution

Code:

   pf.c (HTML wrapped source)

Package

   pipefork-1_0_0.tar.gz (Includes Makefile)

What it does

This is a quick (Linux) utility to list the top applications on the system by open files as well as the total file statistics for the system.

Code of value

This is more valuable as an actual utility but includes code for reading a directory (specifically the /proc filesystem).

Distribution

Code:

   fusage.c (HTML wrapped source)

Package

   fusage-0_6_0.tar.gz (Includes Makefile)

What it does

I need a routine to find the sector sizes of disks in Linux for yapfr. This is a piece of sample (test) code to find that value for a given disk. It also returns the number of sectors on the disk and then calculates the disk size.

Code of value

Usage of: open() on a device and ioctl() on a disk device.

Distribution

Code:

   sectsz.c (HTML wrapped source)