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Diffstat (limited to 'gnu/libexec/uucp/contrib/savelog.sh')
| -rwxr-xr-x | gnu/libexec/uucp/contrib/savelog.sh | 247 |
1 files changed, 247 insertions, 0 deletions
diff --git a/gnu/libexec/uucp/contrib/savelog.sh b/gnu/libexec/uucp/contrib/savelog.sh new file mode 100755 index 000000000000..64c989f292b2 --- /dev/null +++ b/gnu/libexec/uucp/contrib/savelog.sh @@ -0,0 +1,247 @@ +#! /bin/sh +# @(#)util/savelog.sh 1.4 26 Oct 1991 22:49:39 +# +# savelog - save a log file +# +# Copyright (C) 1987, 1988 Ronald S. Karr and Landon Curt Noll +# +# See the file COPYING, distributed with smail, for restriction +# and warranty information. +# +# usage: savelog [-m mode] [-u user] [-g group] [-t] [-c cycle] [-l] file... +# +# -m mode - chmod log files to mode +# -u user - chown log files to user +# -g group - chgrp log files to group +# -c cycle - save cycle versions of the logfile (default: 7) +# -t - touch file +# -l - don't compress any log files (default: compress) +# file - log file names +# +# The savelog command saves and optionally compresses old copies of files +# into an 'dir'/OLD sub-directory. The 'dir' directory is determined from +# the directory of each 'file'. +# +# Older version of 'file' are named: +# +# OLD/'file'.<number><compress_suffix> +# +# where <number> is the version number, 0 being the newest. By default, +# version numbers > 0 are compressed (unless -l prevents it). The +# version number 0 is never compressed on the off chance that a process +# still has 'file' opened for I/O. +# +# If the 'file' does not exist or if it is zero length, no further processing +# is performed. However if -t was also given, it will be created. +# +# For files that do exist and have lengths greater than zero, the following +# actions are performed. +# +# 1) Version numered files are cycled. That is version 6 is moved to +# version 7, version is moved to becomes version 6, ... and finally +# version 0 is moved to version 1. Both compressed names and +# uncompressed names are cycled, regardless of -t. Missing version +# files are ignored. +# +# 2) The new OLD/file.1 is compressed and is changed subject to +# the -m, -u and -g flags. This step is skipped if the -t flag +# was given. +# +# 3) The main file is moved to OLD/file.0. +# +# 4) If the -m, -u, -g or -t flags are given, then file is created +# (as an empty file) subject to the given flags. +# +# 5) The new OLD/file.0 is chanegd subject to the -m, -u and -g flags. +# +# Note: If the OLD sub-directory does not exist, it will be created +# with mode 0755. +# +# Note: If no -m, -u or -g flag is given, then the primary log file is +# not created. +# +# Note: Since the version numbers start with 0, version number <cycle> +# is never formed. The <cycle> count must be at least 2. +# +# Bugs: If a process is still writing to the file.0 and savelog +# moved it to file.1 and compresses it, data could be lost. +# Smail does not have this problem in general because it +# restats files often. + +# common location +PATH="X_UTIL_PATH_X:X_SECURE_PATH_X"; export PATH +COMPRESS="X_COMPRESS_X" +COMP_FLAG="X_COMP_FLAG_X" +DOT_Z="X_DOT_Z_X" +CHOWN="X_CHOWN_X" +GETOPT="X_UTIL_BIN_DIR_X/getopt" + +# parse args +exitcode=0 # no problems to far +prog=$0 +mode= +user= +group= +touch= +count=7 +set -- `$GETOPT m:u:g:c:lt $*` +if [ $# -eq 0 -o $? -ne 0 ]; then + echo "usage: $prog [-m mode][-u user][-g group][-t][-c cycle][-l] file ..." 1>&2 + exit 1 +fi +for i in $*; do + case $i in + -m) mode=$2; shift 2;; + -u) user=$2; shift 2;; + -g) group=$2; shift 2;; + -c) count=$2; shift 2;; + -t) touch=1; shift;; + -l) COMPRESS=""; shift;; + --) shift; break;; + esac +done +if [ "$count" -lt 2 ]; then + echo "$prog: count must be at least 2" 1>&2 + exit 2 +fi + +# cycle thru filenames +while [ $# -gt 0 ]; do + + # get the filename + filename=$1 + shift + + # catch bogus files + if [ -b "$filename" -o -c "$filename" -o -d "$filename" ]; then + echo "$prog: $filename is not a regular file" 1>&2 + exitcode=3 + continue + fi + + # if not a file or empty, do nothing major + if [ ! -s $filename ]; then + # if -t was given and it does not exist, create it + if [ ! -z "$touch" -a ! -f $filename ]; then + touch $filename + if [ "$?" -ne 0 ]; then + echo "$prog: could not touch $filename" 1>&2 + exitcode=4 + continue + fi + if [ ! -z "$user" ]; then + $CHOWN $user $filename + fi + if [ ! -z "$group" ]; then + chgrp $group $filename + fi + if [ ! -z "$mode" ]; then + chmod $mode $filename + fi + fi + continue + fi + + # be sure that the savedir exists and is writable + savedir=`expr "$filename" : '\(.*\)/'` + if [ -z "$savedir" ]; then + savedir=./OLD + else + savedir=$savedir/OLD + fi + if [ ! -s $savedir ]; then + mkdir $savedir + if [ "$?" -ne 0 ]; then + echo "$prog: could not mkdir $savedir" 1>&2 + exitcode=5 + continue + fi + chmod 0755 $savedir + fi + if [ ! -d $savedir ]; then + echo "$prog: $savedir is not a directory" 1>&2 + exitcode=6 + continue + fi + if [ ! -w $savedir ]; then + echo "$prog: directory $savedir is not writable" 1>&2 + exitcode=7 + continue + fi + + # deterine our uncompressed file names + newname=`expr "$filename" : '.*/\(.*\)'` + if [ -z "$newname" ]; then + newname=$savedir/$filename + else + newname=$savedir/$newname + fi + + # cycle the old compressed log files + cycle=`expr $count - 1` + rm -f $newname.$cycle $newname.$cycle$DOT_Z + while [ "$cycle" -gt 1 ]; do + # --cycle + oldcycle=$cycle + cycle=`expr $cycle - 1` + # cycle log + if [ -f $newname.$cycle$DOT_Z ]; then + mv -f $newname.$cycle$DOT_Z $newname.$oldcycle$DOT_Z + fi + if [ -f $newname.$cycle ]; then + # file was not compressed for some reason move it anyway + mv -f $newname.$cycle $newname.$oldcycle + fi + done + + # compress the old uncompressed log if needed + if [ -f $newname.0 ]; then + if [ -z "$COMPRESS" ]; then + newfile=$newname.1 + mv $newname.0 $newfile + else + newfile=$newname.1$DOT_Z + $COMPRESS $COMP_FLAG < $newname.0 > $newfile + rm -f $newname.0 + fi + if [ ! -z "$user" ]; then + $CHOWN $user $newfile + fi + if [ ! -z "$group" ]; then + chgrp $group $newfile + fi + if [ ! -z "$mode" ]; then + chmod $mode $newfile + fi + fi + + # move the file into the file.0 holding place + mv -f $filename $newname.0 + + # replace file if needed + if [ ! -z "$touch" -o ! -z "$user" -o \ + ! -z "$group" -o ! -z "$mode" ]; then + touch $filename + fi + if [ ! -z "$user" ]; then + $CHOWN $user $filename + fi + if [ ! -z "$group" ]; then + chgrp $group $filename + fi + if [ ! -z "$mode" ]; then + chmod $mode $filename + fi + + # fix the permissions on the holding place file.0 file + if [ ! -z "$user" ]; then + $CHOWN $user $newname.0 + fi + if [ ! -z "$group" ]; then + chgrp $group $newname.0 + fi + if [ ! -z "$mode" ]; then + chmod $mode $newname.0 + fi +done +exit $exitcode |