code reading

install.6 [ reading code ]

static int selinux_enabled = 0;

The value of variable “selinux_enabled” is
constant 0 of integer type which is not allowed to change.
value of selinux_enabled is constant 0 is Proposition p.
variable selinux_enabled is of type integer is Proposition q .
value of selinux_enabled is not allowed to change is Proposition r.
<br /> \texttt {So. p is true if } q \; \wedge \; r \\<br /> \texttt{So P is a compound proposition or conjuction.}<br />
http://selinuxproject.org/page/Main_Page
http://en.wikipedia.org/wiki/Security-Enhanced_Linux

install.5 [ reading code ]

For the spirit of the LORD fills the world,
all-embracing, and knows what man says.
Wisdom 1:7

#if HAVE_SYS_WAIT_H
# include <sys/wait.h>
#endif

Implication. If p then q.
[math] { p \; \Rightarrow \; q } [/math]

If  HAVE_SYS_WAIT_H is true (nonzero value)
then compile the following line(compilation of #include <sys/wait.h>)
will be done.


http://www.cprogramming.com/tutorial/cpreprocessor.html

http://en.wikipedia.org/wiki/Implication