[unix-history] / usr / src / share / doc / psd / 04.uprog / p1

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INTRODUCTION
.PP
This paper describes how to write
programs 
that interface with the
.UC UNIX
operating system in a non-trivial way.
This includes programs that use files by name,
that use pipes,
that invoke other commands as they run,
or that attempt to catch interrupts and other signals
during execution.
.PP
The document collects material which is scattered
throughout several sections of
.I
The
.UC UNIX
Programmer's Manual
.R
[1]
for Version 7
.UC UNIX .
There is no attempt to be complete;
only generally useful material is dealt with.
It is assumed that you will be programming in C,
so you must be able to read the language
roughly up to the level of
.I
The C Programming Language
.R
[2].
Some of the material in sections 2 through 4
is based on
topics covered more carefully there.
You should also be familiar with
.UC UNIX
itself
at least
to the level of
.I
.UC UNIX
for Beginners
.R
[3].
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	5	.if n .ls 2
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	7	.NH
	8	INTRODUCTION
	9	.PP
	10	This paper describes how to write
	11	programs
	12	that interface with the
	13	.UC UNIX
	14	operating system in a non-trivial way.
	15	This includes programs that use files by name,
	16	that use pipes,
	17	that invoke other commands as they run,
	18	or that attempt to catch interrupts and other signals
	19	during execution.
	20	.PP
	21	The document collects material which is scattered
	22	throughout several sections of
	23	.I
	24	The
	25	.UC UNIX
	26	Programmer's Manual
	27	.R
	28	[1]
	29	for Version 7
	30	.UC UNIX .
	31	There is no attempt to be complete;
	32	only generally useful material is dealt with.
	33	It is assumed that you will be programming in C,
	34	so you must be able to read the language
	35	roughly up to the level of
	36	.I
	37	The C Programming Language
	38	.R
	39	[2].
	40	Some of the material in sections 2 through 4
	41	is based on
	42	topics covered more carefully there.
	43	You should also be familiar with
	44	.UC UNIX
	45	itself
	46	at least
	47	to the level of
	48	.I
	49	.UC UNIX
	50	for Beginners
	51	.R
	52	[3].