Minimal Perl For UNIX and Linux People 5 pot

... Reading and Writing After the port is open and configured, a program can send and receive data through it. In both Windows and Linux the serial port is treated as a file, and the file read and write ... were read or written applies. 6 Serial Port Programming in Windows and Linux Maxwell Walter November 7, 2003 Abstract While devices that use RS−232 and the s...

Ngày tải lên: 05/11/2013, 20:15

... write one now rather than wait for a crisis to convince you of its value. 1 Unix and Linux Backups SANS GIAC LevelOne â 2000, 2001 1 Unix and Linux Backups for System Administrators By Robert Blader Hello, ... much less stressful later. 21 Unix and Linux Backups SANS GIAC LevelOne â 2000, 2001 21 dd Examples - Forensics ã Files AND filesystem metadata are...

Ngày tải lên: 17/01/2014, 08:20

... xxxv Part 1 Minimal Perl: for UNIX and Linux Users 1 1 Introducing Minimal Perl 3 1.1 A visit to Perlistan 3 Sometimes you need a professional guide 5 1.2 Perl can be simple 7 1.3 About Minimal Perl ... A Unix- like, OS-portable find command 198 Making the most of find 2perl 198 ✦ Helping non -Unix friends with find 2perl 199 6.8 Summary 200 Directions for furthe...

Ngày tải lên: 25/03/2014, 10:27

... stands for the union of sets A and B ∩ intersection (Boolean multiplication); A ∩B stands for the intersection (com- mon part) of sets A and B ⊂ inclusion; A ⊂ B means that the set A is part of ... of numbers a and b is denoted by a + b and has the property a + b = b + a – minus sign; the difference of numbers a and b is denoted by a – b ⋅ multiplication sign; the p...

Ngày tải lên: 02/07/2014, 13:20

... Minimal Perl 3 1. 1 A visit to Perlistan 3 Sometimes you need a professional guide 5 1. 2 Perl can be simple 7 1. 3 About Minimal Perl 7 What Minimal Perl isn’t 8 ✦ What Minimal Perl is 8 1. 4 Laziness ... Perlistan 3 1. 2 Perl can be simple 7 1. 3 About Minimal Perl 7 1. 4 Laziness is a virtue 9 1. 5 A minimal dose of syntax 10 1. 6 Writing one-line progra...

Ngày tải lên: 06/08/2014, 03:20

... routinely in Minimal Perl and removed only in the rare cases where it spoils the results. It’s shown here for both the sed and perl commands for uniformity. WRITING SIMPLE SCRIPTS 37 The second form ... "msg" format validate_file2: Sorry, no switches allowed at validate_file2 line 6 Table 2. 6 Shell and Perl techniques for writing messages to STDOUT and STD...

Ngày tải lên: 06/08/2014, 03:20

... characters) that stands for something other than itself. 3 The word characters are defined later, in table 3. 5. 68 CHAPTER 3 PERL AS A (BETTER) grep COMMAND The following command looks for matches ... delimiters Matches perl in $_. $data =~ /perl/ i Looks for a match with perl in $data, ignoring case differences Matches perl , PERL , Perl , and so on in $data. $data =~...

Ngày tải lên: 06/08/2014, 03:20

... was so easily incorporated into the Perl script. For reference purposes, table 4. 6 provides a handy summary of the corresponding sed and perl commands that perform basic editing tasks, along with ... more, Perl s Shell-inspired eval function can be used for much more than substitutions, as you’ll see in section 8.7. Ta b l e 4 . 6 sed and Perl commands for common editing...

Ngày tải lên: 06/08/2014, 03:20

... # Check for proper invocation 9 $amount and $rate or warn "$Usage\n" and exit 255 ; 10 11 $pct_rate=$rate/100; # 5 becomes . 05 12 $multiplier=1 + $pct_rate; # . 05 becomes 1. 05 13 # ... installing Perl (and therefore find 2perl) , such people can use find commands like those shown previously. The procedure is as follows. The find 2perl command is run with opti...

Ngày tải lên: 06/08/2014, 03:20

... similarities and differences in how data flows between com- mands and functions. 7.3.1 Comparing Unix pipelines and Perl functions Although there are distinct similarities between Unix command pipelines ... relatives in Unix Built-in Perl function Unix relative(s) Purpose Effects sort The Unix sort command List sorting Takes a list, and returns a sorted list. reverse...

Ngày tải lên: 06/08/2014, 03:20

... ã man perlop # operators, and command interpolation ã man perlsyn # basic syntax, including if/else ã man tput # command that retrieves terminal information ã man Term::ANSIColor # module for coloring ... treatment. For help in spotting these syntax errors and others, try running your code through a beautifier. You can learn about and download the standard Perl beautifier from ht...

Ngày tải lên: 06/08/2014, 03:20

... } NOTE The Shell’s for loop is similar to Perl s foreach loop, not Perl s for loop. 10.5 LOOPING WITH for Although the Shell’s for is like Perl s foreach, Perl does have a for loop of its own, derived ... FACILITIES IN THE SHELL AND PERL 331 But adventurous Shell programmers will eventually encounter standard Unix commands that don’t work this way. For example, both tr...

Ngày tải lên: 06/08/2014, 03:20

... missing from Perl . Table 10 .9 The Shell’s select loop select var ; do commands; done # Form 0 select var in LIST; do commands; done # Form 1 Ta b l e 10 . 1 0 T h e select loop for Perl use Shell::POSIX::Select; select ... conf commands specify your HOME directory’s myperl/lib (for library) subdirectory as the storage location for the modules you install, and HOME’s subdirec-...

Ngày tải lên: 06/08/2014, 03:20

... xxv for loop 345–349 good for index-oriented array processing 345 for loop (Perl) syntax of 345 for loop (Shell) 331 compared to Perl s foreach 340 foreach loop 340–344 compared to Shell’s for ... 189 See also command interpola- tion commands (AWK) for printing rock-star birthdays 130 Perl equivalents for simple tasks 141 simple ones compared to Perl equivalents 128 c...

Ngày tải lên: 06/08/2014, 03:20

... Minimal Perl Minimal Perl For UNIX and Linux People BY TIM MAHER MANNING Greenwich (74° w. long.) For online information and ordering of this and other Manning books, ... for all the good times we’ve had together. vii brief contents Part 1 Minimal Perl: for UNIX and Linux Users 1 1 Introducing Minimal Perl 3 2 Perl essentials 16 3 Perl as a (better...

Ngày tải lên: 26/10/2014, 20:49