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Index
Symbols, numbers
A
B
C
D
E
F
G
H
I
K
L
N
O
P
R
S
T
V
W
X
script
boolean operators
bottom-up
callback functions
case statement,
``Making multiway choices: the case statement''
,
``Making multiway choices: the case statement''
,
``Making choices and testing input''
conditional commands
conditional variable assignment
context
creating
data access overheads
debugging
directory search overheads
elapsed time
else statement
examples,
``Other useful examples''
,
``Putting everything together''
exit values
file handling
file locking
file size overheads
for loop
getopts(C)
handling arguments
here document
if ... and exit values
if statement,
``The && and || operators''
,
``Choosing one of two options: the if statement''
logical-if statement
loop construct
comparison
optimization
loop performance
menu-driven interfaces
necessary permissions
optimization,
``Number of processes generated''
,
``Number of processes generated''
performance,
``How programs perform''
,
``How to control program performance''
prevent from overwriting files
problems with environment
read(C)
reading a character
running under a foreign shell
select statement
short example
structure
subroutines
supporting commands
terminal control
test statement
toggle variables
tracing execution
until loop
while loop
writing,
``Tuning script performance''
,
``Solving problems with your script''
searching, for inodes
sed
addressing
context
introduced
line number
rules
a function
B! function
b label function
c function
command grouping
command structure
comments
d function
D function
-e
-f
flow-of-control
flow-of-control functions
{ function
= function
functions,
``Writing sed commands''
,
``Functions''
g function,
``Substitute functions''
,
``Hold and get functions''
G function
h function
H function
hold and get functions
i function
input/output functions
: label function
l function
miscellaneous functions
multiline searching
multiple input-line functions
-n
n function,
``Whole-line oriented functions''
,
``Substitute functions''
N function
pattern space,
``How sed commands are carried out''
,
``How sed commands are carried out''
holding more than one line
p function,
``Substitute functions''
,
``Input-output functions''
P function
q function
regular expressions and
related to grep
r function
running
s function
substitution functions
t label function
w function,
``Substitute functions''
,
``Input-output functions''
x function
sed(C)
select statement
shells
arithmetic
boolean operators
case statement,
``Making multiway choices: the case statement''
,
``Making multiway choices: the case statement''
,
``Making choices and testing input''
conditional commands,
``Repeating commands zero or more times: the while loop''
,
``Repeating commands one or more times: the until loop''
else statement
file descriptors
for loop
getopts,
``Making choices and testing input''
,
``Getting options from the command line: getopts''
handling arguments
if statement
input
logical-and (&&) statement
logical-or (||) statement
looping constructs compared
noclobber
opening files for reading
output
programming examples
read(C)
reading a character
reading standard input
regular expressions
script, using awk
script structure
select statement
tracing execution
until loop
while loop
standard
error
redirecting to /dev/null
input
output
string manipulation, in awk
stty, terminal mode
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