Unix Shell Programming Tools

by Medinets, Dave

• ISBN13: 9780079137906
• ISBN10: 0079137903
• Format: Paperback
• Copyright: 1999-02-01
• Publisher: McGraw-Hill Osborne Media

Summary

Provides a one-step all inclusive resource that demonstrates how to utilize shell programming to maximize the effectiveness of the UNIX server/ environment. Covers all the tools you need, and provides clear advice on how to create programs that perform the tasks you need them to. Softcover. CD-ROM included.

Author Biography

David Medinets, the author or co-author of twelve books, including Perl 5 By Example (published by Que), has been working on UNIX systems since 1980. He is the founder and president of Eclectic Consulting.

Table of Contents

Code Listings	xi	(6)
Introduction	xvii
01 Playing with Shells	1	(16)
Exploring Access Permissions	3	(1)
Running a Shell Script	4	(2)
Exploring Shell Programming	6	(1)
Counting Shells	7	(1)
Exploring Shell Features	8	(6)
The Shell/Perl/Tcl Bridge	14	(1)
Summary	15	(2)
02 Variables and Operators	17	(34)
Variable Substitution	23	(4)
Position Variables	27	(2)
Process Variables	29	(2)
Bash Quoting Rules	31	(1)
Operators	32	(5)
Expression Substitution	37	(1)
Standard Shell Variables	38	(6)
Variable Affecting Commands	44	(5)
Summary	49	(2)
03 Procedures	51	(12)
Using Variables Inside Procedures	55	(2)
The shift Command	57	(1)
Creating Local Procedure Variables	58	(2)
Returning Values From Procedures	60	(1)
Summary	60	(3)
04 Script Execution Commands	63	(28)
The exit Command	65	(1)
The trap Command	66	(8)
The if Command	74	(2)
The case Command	76	(1)
The for Statement	77	(5)
The while Command	82	(3)
The until Command	85	(1)
The break Command	86	(2)
The continue Command	88	(1)
Summary	89	(2)
05 Controlling the Shell	91	(36)
Creating Command Lists	92	(1)
Creating Compound Commands	93	(4)
Redirecting Input/Output	97	(12)
Reading Input	109	(4)
Using the "-" File	113	(1)
Using Device Files	114	(2)
Using Exec	116	(2)
Using Eval	118	(2)
Using Background Processes	120	(3)
Summary	123	(4)
06 Using Perl	127	(66)
The Features of Perl	129	(1)
Introduction to Perl	130	(2)
Variables in Perl	132	(4)
Using Static Information	136	(3)
Using Backticked Strings	139	(1)
Using Statements	139	(25)
Using Files	164	(4)
Special Variables	168	(10)
Objects	178	(5)
Using Modules	183	(6)
Summary	189	(4)
07 Using Tcl/Tk	193	(40)
The Features of Tcl	194	(2)
Introduction to Tcl	196	(3)
Understanding Substitution Concepts	199	(3)
Understanding Grouping Concepts	202	(3)
Data Structures	205	(3)
Using Statements	208	(19)
Using Files	227	(2)
Beyond the Shell	229	(2)
Summary	231	(2)
08 Pattern Matching	233	(60)
Bash	235	(6)
Perl	241	(8)
The Binding Operators (=~ and !~)	249	(33)
Tcl	282	(7)
Summary	289	(4)
09 Examining the Tools	293	(122)
The basename Command	297	(1)
The cat Command	298	(2)
The cksum Command	300	(2)
The clear Command	302	(1)
The col Command	302	(1)
The cp Command	303	(3)
The csplit Command	306	(4)
The cut Command	310	(3)
The date Command	313	(3)
The diff Command	316	(3)
The echo Command	319	(2)
The env Command	321	(1)
The expr Command	322	(3)
The eval Command	325	(1)
The false Command	326	(1)
The fgrep Command	326	(1)
The find Command	326	(14)
The grep Command	340	(6)
The groff Command	346	(10)
The head Command	356	(1)
The info Command	357	(1)
The join Command	358	(4)
The kill Command	362	(1)
The less Command	363	(1)
The man Command	364	(1)
The mv Command	365	(2)
The nl Command	367	(1)
The ps Command	368	(4)
The pstree Command	372	(3)
The read Command	375	(1)
The rm Command	376	(1)
The sort Command	377	(6)
The split Command	383	(1)
The strings Command	384	(2)
The tail Command	386	(2)
The tee Command	388	(2)
The test Command	390	(6)
The tr Command	396	(5)
The true Command	401	(1)
The tty Command	401	(1)
The type Command	402	(1)
The uname Command	403	(1)
The uniq Command	404	(2)
The wc Command	406	(1)
The who Command	407	(2)
The write Command	409	(1)
The xargs Command	410	(3)
Summary	413	(2)
10 Portability Issues	415	(28)
Command Equivalents Between Scripting Languages	423	(7)
Portability Across Platforms	430	(11)
Summary	441	(2)
11 Debugging Concepts	443	(30)
Syntax Errors	444	(5)
Runtime Errors	449	(2)
Meltdowns	451	(1)
Debugging Techniques	451	(9)
Debugging Tools	460	(11)
Summary	471	(2)
12 Customizing the Tools	473	(58)
A Better find Command	474	(5)
A Better write Command	479	(13)
A "Safe" delete Command	492	(3)
A Limited-Use Login Shell	495	(5)
What is the User's First Name?	500	(4)
Creating Proper Capitalization	504	(4)
Useful Information, Tips, and Warnings	508	(1)
Counting Files	509	(1)
The replace Command	510	(19)
Summary	529	(2)
Appendix A Internet Resources	531	(6)
Usenet Newsgroups	532	(1)
Web Sites	533	(3)
Internet Relay Chat (IRC)	536	(1)
Appendix B The ASCII Table	537	(12)
Index	549