Advanced Bash−Scripting Guide

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Advanced Bash−Scripting Guide } return; fi if [ $# = 2 ]; then sig=$1 ; fi for pid in $(my_ps| awk '!/awk/ && $0~pat { print $1 }' pat=${!#} ) ; do pname=$(my_ps | awk '$1~var { print $5 }' var=$pid ) if ask "Kill process $pid with signal $sig?" then kill $sig $pid fi done function my_ip() # get IP adresses { MY_IP=$(/sbin/ifconfig ppp0 | awk '/inet/ { print $2 } ' | sed −e s/addr://) MY_ISP=$(/sbin/ifconfig ppp0 | awk '/P−t−P/ { print $3 } ' | sed −e s/P−t−P://) } function ii() # get current host related info { echo −e "\nYou are logged on ${RED}$HOST" echo −e "\nAdditionnal information:$NC " ; uname −a echo −e "\n${RED}Users logged on:$NC " ; w −h echo −e "\n${RED}Current date :$NC " ; date echo −e "\n${RED}Machine stats :$NC " ; uptime echo −e "\n${RED}Memory stats :$NC " ; free my_ip 2>&− ; echo −e "\n${RED}Local IP Address :$NC" ; echo ${MY_IP:−"Not connected"} echo −e "\n${RED}ISP Address :$NC" ; echo ${MY_ISP:−"Not connected"} echo } # Misc utilities: function repeat() # repeat n times command { local i max max=$1; shift; for ((i=1; i C−like syntax eval "$@"; done } function ask() { echo −n "$@" '[y/n] ' ; read ans case "$ans" in y*|Y*) return 0 ;; *) return 1 ;; esac } #========================================================================= # # PROGRAMMABLE COMPLETION − ONLY SINCE BASH−2.04 # Most are taken from the bash 2.05 documentation and from Ian McDonalds # 'Bash completion' package (http://www.caliban.org/bash/index.shtml#completion) # You will in fact need bash−2.05a for some features # #========================================================================= if [ "${BASH_VERSION%.*}" \< "2.05" ]; then echo "You will need to upgrade to version 2.05 for programmable completion" Appendix G. A Sample .bashrc File 424
Advanced Bash−Scripting Guide fi return shopt −s extglob set +o nounset complete −A hostname complete −A export complete −A variable complete −A enabled complete −A alias complete −A function complete −A user # necessary # otherwise some completions will fail rsh rcp telnet rlogin r ftp ping disk printenv export local readonly unset builtin alias unalias function su mail finger complete −A helptopic help # currently same as builtins complete −A shopt shopt complete −A stopped −P '%' bg complete −A job −P '%' fg jobs disown complete −A directory mkdir rmdir complete −A directory −o default cd # Compression complete −f −o default −X '*.+(zip|ZIP)' zip complete −f −o default −X '!*.+(zip|ZIP)' unzip complete −f −o default −X '*.+(z|Z)' compress complete −f −o default −X '!*.+(z|Z)' uncompress complete −f −o default −X '*.+(gz|GZ)' gzip complete −f −o default −X '!*.+(gz|GZ)' gunzip complete −f −o default −X '*.+(bz2|BZ2)' bzip2 complete −f −o default −X '!*.+(bz2|BZ2)' bunzip2 # Postscript,pdf,dvi..... complete −f −o default −X '!*.ps' gs ghostview ps2pdf ps2ascii complete −f −o default −X '!*.dvi' dvips dvipdf xdvi dviselect dvitype complete −f −o default −X '!*.pdf' acroread pdf2ps complete −f −o default −X '!*.+(pdf|ps)' gv complete −f −o default −X '!*.texi*' makeinfo texi2dvi texi2html texi2pdf complete −f −o default −X '!*.tex' tex latex slitex complete −f −o default −X '!*.lyx' lyx complete −f −o default −X '!*.+(htm*|HTM*)' lynx html2ps # Multimedia complete −f −o default −X '!*.+(jp*g|gif|xpm|png|bmp)' xv gimp complete −f −o default −X '!*.+(mp3|MP3)' mpg123 mpg321 complete −f −o default −X '!*.+(ogg|OGG)' ogg123 complete −f −o default −X '!*.pl' perl perl5 # This is a 'universal' completion function − it works when commands have # a so−called 'long options' mode , ie: 'ls −−all' instead of 'ls −a' _get_longopts () { $1 −−help | sed −e '/−−/!d' −e 's/.*−−$[^[:space:].,]*$.*/−−\1/'| \ grep ^"$2" |sort −u ; } _longopts_func () { case "${2:−*}" in −*) ;; Appendix G. A Sample .bashrc File 425
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Advanced Bash−Scripting Guide An
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Advanced Bash−Scripting Guide Tab
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Chapter 1. Why Shell Programming? A
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Chapter 2. Starting Off With a Sha
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Advanced Bash−Scripting Guide Eac
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Chapter 3. Special Characters Speci
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Advanced Bash−Scripting Guide \ /
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Advanced Bash−Scripting Guide * ?
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Advanced Bash−Scripting Guide ech
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Advanced Bash−Scripting Guide ASC
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# Sometimes, though, you get: # 11
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The "−" can be used to pipe stdou
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change the behavior of the terminal
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Chapter 4. Introduction to Variable
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Advanced Bash−Scripting Guide Exa
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Advanced Bash−Scripting Guide MIN
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The shift command reassigns the pos
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Example 5−1. Echoing Weird Variab
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(cd /source/directory && tar cf −
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true # the "true" builtin. echo "ex
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Advanced Bash−Scripting Guide Thi
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Advanced Bash−Scripting Guide if
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if [[ −e $file ]] then echo "Pass
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Advanced Bash−Scripting Guide −
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7.3. Comparison operators (binary)
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Example 7−5. arithmetic and strin
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Chapter 8. Operations and Related T
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Advanced Bash−Scripting Guide ! ^
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Advanced Bash−Scripting Guide let
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Part 3. Beyond the Basics Table of
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$EDITOR the default editor invoked
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Advanced Bash−Scripting Guide (Th
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Advanced Bash−Scripting Guide #!/
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Example 9−2. Timed Input Advanced
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Advanced Bash−Scripting Guide fi
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echo 'IFS=":", using "$@"' c=0 for
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Advanced Bash−Scripting Guide #+
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Advanced Bash−Scripting Guide use
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echo '${var1#$pattern1} =' "${var1#
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t=${path_name%/*.*} # Same effect a
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Chapter 10. Loops and Branches Oper
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Advanced Bash−Scripting Guide # T
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Advanced Bash−Scripting Guide OUT
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As is the case with for/in loops, p
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This construct tests for a conditio
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Advanced Bash−Scripting Guide ###
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# Accept upper or lowercase input.
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Advanced Bash−Scripting Guide a=`
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# May need to also press ENTER if a
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Advanced Bash−Scripting Guide ena
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cat, tac # Burn the CDR. cdrecord
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Advanced Bash−Scripting Guide 12.
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exit $E_CHANGED_MIND ;; *) echo "De
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The multiplication operator must be
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echo Number of digits at the beginn
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Outputs very verbose timing statist
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This line occurs three times. This
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# List all the users in /etc/passwd
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Advanced Bash−Scripting Guide # r
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Advanced Bash−Scripting Guide gre
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The −d option deletes a range of
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# Delete CR and write to new file.
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Advanced Bash−Scripting Guide gzi
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Advanced Bash−Scripting Guide # S
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Advanced Bash−Scripting Guide No
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mailto Similar to the mail command,
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Advanced Bash−Scripting Guide pst
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[ ${NETWORKING} = "no" ] && exit 0
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chroot Advanced Bash−Scripting Gu
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Advanced Bash−Scripting Guide bas
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Advanced Bash−Scripting Guide ' c
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Advanced Bash−Scripting Guide Not
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Chapter 15. Arithmetic Expansion Ar
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# Saves stdin. Advanced Bash−Scri
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Advanced Bash−Scripting Guide 16.
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Chapter 17. Here Documents A here d
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Advanced Bash−Scripting Guide Fil
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Example 17−11. A self−documenti
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Part 4. Advanced Topics At this poi
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Advanced Bash−Scripting Guide lit
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"Sed & Awk", by Dougherty and Robbi
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Chapter 20. Subshells Running a she
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Advanced Bash−Scripting Guide exe
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Advanced Bash−Scripting Guide f1
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# Range: 0 − 200 # It's crude, bu
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Advanced Bash−Scripting Guide alt
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# grep PATTERN /etc/passwd | awk
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Advanced Bash−Scripting Guide # Y
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Chapter 25. List Constructs The "an
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# AND LIST executes on true, OR LIS
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echo ${colors[$index]} let "index =
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# Replace all matching wildcarded s
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Advanced Bash−Scripting Guide Cop
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fi let "t += $i " Primes[t]=$NON_PR
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Advanced Bash−Scripting Guide # =
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# −−−−−−−−− # 1)
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Chapter 28. /dev and /proc A Linux
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Advanced Bash−Scripting Guide net
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Advanced Bash−Scripting Guide # A
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Chapter 30. Debugging The Bash shel
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4. Advanced Bash−Scripting Guide
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Advanced Bash−Scripting Guide whi
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Chapter 31. Options Options are set
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Chapter 32. Gotchas Turandot: Gli e
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command1 2> − | command2 # Trying
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echo "one two three" | read a b c #
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Chapter 33. Scripting With Style Ge
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Advanced Bash−Scripting Guide # i
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Advanced Bash−Scripting Guide tpu
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#!/bin/bash # color−echo.sh: Echo
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34.7. Assorted Tips Advanced Bash
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Advanced Bash−Scripting Guide the
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Advanced Bash−Scripting Guide •
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# agram.sh: Playing games with anag
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Chapter 35. Bash, version 2 The cur
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Advanced Bash−Scripting Guide # R
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1−56592−580−7). This is the s
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Bibliography Edited by Peter Dennin
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Advanced Bash−Scripting Guide * A
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Mark Komarinski's Printing−Usage
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Page 389 and 390: let "row = $r" # Count center row o
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Page 413 and 414: Appendix B. A Sed and Awk Micro−P
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Page 419 and 420: Appendix D. A Detailed Introduction
Page 421 and 422: Appendix E. Localization Localizati
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Page 435 and 436: Appendix H. Converting DOS Batch Fi
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Page 439 and 440: Appendix I. Exercises I.1. Analyzin
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