Csh

UNIX C Shell(csh)에 대한 일반적인 정보를 저장한다.

C Shell 기본

• Last update : 1998.03.05 - 1998.12.14

• 자료 입력

set VAR = $<

• cut -d[경계기호] -f1,3-4 file
• awk 'BEGIN {~} {~} END {~}' file

awk -F[분리기호] -f File file
NR : 레코드 번호

• 환경변수가 있는지 검사

if ($?GROUP == 0) then
    set     GROUP="init"
    setenv  GROUP "init"
endif

C Shell의 유용한 특징

 Filename Completion        : ESC, ^D, ~[user]
 Command Aliasing           : alias  lm 'ls  -l  \!*  |  more'
 History Substitution       :
    !!, !n, !-n, !?str? additional, !{command} additional,
    ^prev^replace^, !:s/prev/replace/, !6:s/prev/replace/
 Job Control                :
    CTRL-z, bg, fg, kill, stop,
    % = %+ = %%, %-, %j, %?string

 I/O Redirection            : <, <<word, >, >!, >&, >&!, >>, >>&, >>!, >>&!
 Variable Substitution      : $var = ${var}
    $var, $var[index-index], $#name, $0, $n = $argv[n], $* = $argv[*],
    $?var, $?0, $$, $<, $#argv, $status
 Filename Substitutions     : *, ?, [ ... ], { str, str, ...  }, ~[user]
 Expressions and Operators  :
    (...), ~, !, *, /, %, +, -, <<, >>, <, >, <=, >=, ==, !=, =~, !~,
    &, ^, |, &&, ||, -r filename, -w filename, -x filename, -e filename,
    -o filename, -z filename, -f filename, -d filename, {command}
 Predefined Shell Variables :
    argv, cdpath, cwd, echo, fignore, filec, hardpaths, histchars, history,
    home, ignoreeof, mail, nobeep, noclobber, noglob, nonomatch, notify,
    path, prompt, savehist, shell, status, time, verbose

 Built-in Commands          :
    :, alias [name [def]], unalias pattern, kill -l,
    limit [-h] [resource [max-use]], continue, break,
    cd [dir], chdir [dir], dirs [-l], echo [-n] list,
    eval argument..., exec command, exit [(expr)], glob wordlist,
    goto label, hashstat, history [-hr] [n],  login [username| -p], logout,
    bg [%job ...], fg [%job], jobs[-l], kill [-sig] [pid] [%job] ..., %[job] [&],
    stop %jobid ..., stop pid ..., suspend,
    nice [+n|-n] [command], nohup [command], notify [%job] ..., onintr [-| label],
    pushd [+n|dir], popd [+n], rehash, repeat count command,
    set [var[=value]], set var[n]=word, setenv [VAR [word]], shift [variable],
    source [-h] name, time [command], umask [value],
    unhash, unlimit [-h] [resource], unset pattern, unsetenv variable, wait,
    @[var=expr], @[var[n]=expr]

#!/usr/bin/csh
  foreach var (wordlist)               while (expr)
     ...                                  ...
     continue;                            break;
  end                                  end

  if (expr) then                       switch (string)
     ...                                  case label:
  else if (expr2) then                       ...
     ...                                     breaksw
  else                                    default:
     ...                                     ...
  endif                                      breaksw
                                       endsw

• 수치계산 : expr 계산식

C Shell의 실행시 처리 순서

1. Login shell : /etc/.login, ~/.cshrc, ~/.login, (.history,) ~/.logout
2. 일반적 shell : ~/.cshrc

C Shell의 Options

 -b :
 -c : Execute the first argument
 -s : Take commands from the standard input.
 -t : Read and execute a single command line.
 -e :
 -f : Fast start (.cshrc, .login을 수행하지 않는다.)
 -i :
 -n : Parse (interpret), but do not execute commands.
 -v :
 -V :
 -x :
 -X :

/etc/.login

#ident  "@(#)login.csh  1.6     93/09/15 SMI"
if (! -e .hushlogin ) then
        /usr/sbin/quota
        /bin/cat -s /etc/motd
        /bin/mail -E
        switch ( $status )
        case 0:
                echo "You have new mail."
                breaksw;
        case 2:
                echo "You have mail."
                breaksw;
        endsw
endif

.login

# @(#)local.login 1.3     93/09/15 SMI
setenv    TERM      vt100
setenv    EDITOR    vi
setenv    LANG      ko
loadkeys  korea_5
umask     000
stty      erase     ^?

.cshrc

# @(#)cshrc 1.11 89/11/29 SMI
set       path=(. /opt/cobol/bin /usr/bin /usr/openwin/lib /lib $HOME/bin)
set       path=($path $IEAPHOME/bin $IEAPHOME/startup)
set       cdpath=(/home3/skci)
set       prompt="[`hostname`:`pwd`]"
set       history=32

setenv    IEAPHOME            /homeb/ieap10
setenv    LD_LIBRARY_PATH     /opt/cobol/coblib:/usr/ccs/lib:/usr/lib

alias     cd        'cd \!*; set prompt="[`hostname`:`pwd`]"'
alias     cp        cp -i
alias     dir       '/bin/ls -alF \!* | more'
alias     dird      '/bin/ls -alF \!* | grep / | more'
alias     ff        'find . -name \!*\* -print'
alias     h         history
alias     ls        ls -F
alias     mv        mv -i
alias     rm        rm -i
alias     sql       'cd ~/sql;sqlplus apps/apps @sqlplus.sql'
alias     we        'vi -c "source ~/vt220.key" \!*'

.history

set cdpath=(~ /home3/skci ~/bin /app/applmgr/10.7/common /home5/SPIS);clear
cd sql;sqlplus apps/apps @init-pnus.sql
netstat -s | more

.logout

clear
echo ' '
echo ' '
echo '                           <<< Logout time >>>'
echo ' '
echo "               `date`"
echo ' '
echo ' '

참고 문헌

• bash