slacky.eu

Codice: Seleziona tutto

#!/bin/bash
#  Cleanup, versione 3


DIR_LOG=/var/log
ROOT_UID=0     # Solo gli utenti con $UID 0 hanno i privilegi di root.
LINEE=50       # Numero prestabilito di righe salvate.
E_XCD=66       # Riesco a cambiare directory?
E_NONROOT=67   # Codice di exit non-root.


# Da eseguire come root, naturalmente.
if [ "$UID" -ne "$ROOT_UID" ]
then
  echo "Devi essere root per eseguire questo script."
  exit $E_NONROOT
fi

if [ -n "$1" ]
# Verifica se è presente un'opzione da riga di comando (non-vuota).
then
  linee=$1
else
  linee=$LINEE # Valore preimpostato, se non specificato da riga di comando.
fi


#  Stephane Chazelas suggerisce il codice seguente,
#+ come metodo migliore per la verifica degli argomenti da riga di comando,
#+ ma è ancora un po' prematuro a questo punto del manuale.
#
#    E_ERR_ARG=65   # Argomento non numerico (formato dell'argomento non valido)
#
#    case "$1" in
#    ""      ) linee=50;;
#    *[!0-9]*) echo "Utilizzo: `basename $0` file-da-cancellare"; exit\
# $E_ERR_ARG;;
#    *       ) linee=$1;;
#    esac
#
#* Vedere più avanti al capitolo "Cicli" per la comprensione delle righe
#+ precedenti.


cd $DIR_LOG

if [ `pwd` != "$DIR_LOG" ]  # o   if [ "$PWD" != "$DIR_LOG" ]
                            # Non siamo in /var/log?
then
  echo "Non riesco a cambiare in $DIR_LOG."
  exit $E_XCD
fi  #  Doppia verifica per vedere se ci troviamo nella directory corretta,
    #+ prima di cancellare il file di log.

# ancora più efficiente:
#
# cd /var/log || {
#   echo "Non riesco a spostarmi nella directory stabilita." >&2
#   exit $E_XCD;
# }




tail -n $linee messages > mesg.temp # Salva l'ultima sezione del file di
                                    # log messages.
mv mesg.temp messages               # Diventa la nuova directory di log.


# cat /dev/null > messages
#* Non più necessario, perché il metodo precedente è più sicuro.

cat /dev/null > wtmp  #  ': > wtmp' e '> wtmp'  hanno lo stesso effetto.
echo "Log cancellati."

exit 0
#  Il valore di ritorno zero da uno script

Codice: Seleziona tutto

cat .screenrc

#
# Example of a user's .screenrc file
#

# This is how one can set a reattach password:
# password ODSJQf.4IJN7E    # "1234"

# no annoying audible bell, please
vbell on

# detach on hangup

autodetach on

# don't display the copyright page
startup_message off

# emulate .logout message
pow_detach_messaggio "Screen session of \$LOGNAME \$:cr:\$:nl:ended."

# advertise hardstatus support to $TERMCAP
# termcapinfo  * '' 'hs:ts=\E_:fs=\E\\:ds=\E_\E\\'

# make the shell in every window a login shell
#shell -$SHELL

# autoaka testing
# shellaka '> |tcsh'
# shellaka '$ |sh'

# set every new windows hardstatus line to somenthing descriptive
# defhstatus "screen: ^En (^Et)"

defscrollback 1000

# don't kill window after the process died
# zombie "^["

# enable support for the "alternate screen" capability in all windows
# altscreen on

################
#
# xterm tweaks
#

#xterm understands both im/ic and doesn't have a status line.
#Note: Do not specify im and ic in the real termcap/info file as
#some programs (e.g. vi) will not work anymore.
termcap  xterm hs@:cs=\E[%i%d;%dr:im=\E[4h:ei=\E[4l
terminfo xterm hs@:cs=\E[%i%p1%d;%p2%dr:im=\E[4h:ei=\E[4l

#80/132 column switching must be enabled for ^AW to work
#change init sequence to not switch width
termcapinfo  xterm Z0=\E[?3h:Z1=\E[?3l:is=\E[r\E[m\E[2J\E[H\E[?7h\E[?1;4;6l

# Make the output buffer large for (fast) xterms.
#termcapinfo xterm* OL=10000
termcapinfo xterm* OL=100

# tell screen that xterm can switch to dark background and has function
# keys.
termcapinfo xterm 'VR=\E[?5h:VN=\E[?5l'
termcapinfo xterm 'k1=\E[11~:k2=\E[12~:k3=\E[13~:k4=\E[14~'
termcapinfo xterm 'kh=\EOH:kI=\E[2~:kD=\E[3~:kH=\EOF:kP=\E[5~:kN=\E[6~'

# special xterm hardstatus: use the window title.
termcapinfo xterm 'hs:ts=\E]2;:fs=\007:ds=\E]2;screen\007'

#terminfo xterm 'vb=\E[?5h$<200/>\E[?5l'
termcapinfo xterm 'vi=\E[?25l:ve=\E[34h\E[?25h:vs=\E[34l'

# emulate part of the 'K' charset
termcapinfo   xterm 'XC=K%,%\E(B,[\304,\\\\\326,]\334,{\344,|\366,}\374,~\337'

# xterm-52 tweaks:
# - uses background color for delete operations
termcapinfo xterm* be

################
#
# wyse terminals
#

#wyse-75-42 must have flow control (xo = "terminal uses xon/xoff")
#essential to have it here, as this is a slow terminal.
termcapinfo wy75-42 xo:hs@

# New termcap sequences for cursor application mode.
termcapinfo wy* CS=\E[?1h:CE=\E[?1l:vi=\E[?25l:ve=\E[?25h:VR=\E[?5h:VN=\E[?5l:cb=\E[1K:CD=\E[1J

################
#
# other terminals
#

# make hp700 termcap/info better
termcapinfo  hp700 'Z0=\E[?3h:Z1=\E[?3l:hs:ts=\E[62"p\E[0$~\E[2$~\E[1$}:fs=\E[0}\E[61"p:ds=\E[62"p\E[1$~\E[61"p:ic@'

# Extend the vt100 desciption by some sequences.
termcap  vt100* ms:AL=\E[%dL:DL=\E[%dM:UP=\E[%dA:DO=\E[%dB:LE=\E[%dD:RI=\E[%dC
terminfo vt100* ms:AL=\E[%p1%dL:DL=\E[%p1%dM:UP=\E[%p1%dA:DO=\E[%p1%dB:LE=\E[%p1%dD:RI=\E[%p1%dC
termcapinfo linux C8
# old rxvt versions also need this
# termcapinfo rxvt C8


################
#
# keybindings
#

#remove some stupid / dangerous key bindings
bind k
bind ^k
bind .
bind ^\
bind \\
bind ^h
bind h
#make them better
bind 'K' kill
bind 'I' login on
bind 'O' login off
bind '}' history

# Yet another hack:
# Prepend/append register [/] to the paste if ^a^] is pressed.
# This lets me have autoindent mode in vi.
register [ "\033:se noai\015a"
register ] "\033:se ai\015a"
bind ^] paste [.]

################
#
# default windows
#

# screen -t local 0
# screen -t mail 1 mutt
# screen -t 40 2 rlogin server

# caption always "%3n %t%? @%u%?%? [%h]%?%=%c"
# hardstatus alwaysignore
# hardstatus alwayslastline "%Lw"

# bind = resize =
# bind + resize +1
# bind - resize -1
# bind _ resize max
#
# defnonblock 1
# blankerprg rain -d 100
# idle 30 blanker