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#!/usr/local/bin/perl
## Copyright (C) 1994 The New York Group Theory Cooperative
## See magnus/doc/COPYRIGHT for the full notice.
## Contents: backup, a wrapper for cpio, for making an archive of the text
## files in a single directory, skipping obvious junk, and
## compressing it.
##
## Principal Author: Roger Needham
##
## Status: Useable
##
## Revision History:
##
## Next implementation steps:
##
######################################################################
## Configuration parameters:
# File name patterns to reject.
$pattern = "(~|%|#.*#|\\.(BAK|log|ps|dvi|aux|toc|a|d|o))$";
# Default values for command-line arguments:
$only_rcs_p = 0;
$to_do = 0; # 0 -> create, 1 -> extract, 2 -> table of contents
######################################################################
while ( $#ARGV != -1 ) {
$_ = shift;
if ( !/^-/ ) {
$dir_to_bu = $_;
if ( !(-e $dir_to_bu) ) {
print "\n*** Can't find $dir_to_bu\n";
exit 1;
}
last;
}
elsif ( /^-m$/ ) {
$only_rcs_p = !$only_rcs_p;
}
elsif ( /^-x$/ ) {
$to_do = 1;
}
elsif ( /^-t$/ ) {
$to_do = 2;
}
elsif ( /^-h$/ || /^--help$/) {
&help;
exit;
}
elsif ( /^-v$/ || /^--version$/) {
print "\nbackup version 1.0\n";
exit;
}
else {
print "Unknown option: $_\n\n";
&help;
exit 1;
}
}
if ( $to_do == 1 ) {
if ( !($dir_to_bu =~ /\.gz$/) ) {
print "\n*** Argument is not gzip'd.\n";
} else {
system "gunzip -q -c $dir_to_bu | cpio -idm";
}
exit;
} elsif ( $to_do == 2 ) {
if ( !($dir_to_bu =~ /\.gz$/) ) {
print "\n*** Argument is not gzip'd.\n";
} else {
system "gunzip -q -c $dir_to_bu | cpio -it";
}
exit;
}
$home = $ENV{"HOME"};
@lt = gmtime(time);
$mm = substr("0".($lt[4]+1),-2);
$dd = substr("0".$lt[3],-2);
$yy = $lt[5];
split(m:/:,$dir_to_bu);
$dir_name = $_[$#_];
$archive_name = "$home/$dir_name"."_".$mm."_".$dd."_".$yy.".cpio";
if ( -e "$archive_name.gz" ) {
print "\n** $archive_name.gz already exists -- bailing.\n";
exit 1;
}
if ( -e $archive_name ) {
print "\n** $archive_name already exists -- bailing.\n";
exit 1;
}
chdir("$dir_to_bu/..");
if ( $only_rcs_p ) {
open(FIND, "/bin/find $dir_name -name \"*,v\" -type f -print |")
|| die "Unrecoverable error: couldn't run $find: $!\n";
} else {
open(FIND, "/bin/find $dir_name -type f -print |")
|| die "Unrecoverable error: couldn't run $find: $!\n";
}
if ( !open(CPIO, "| cpio -o > $archive_name") ) {
print "\n** problem with cpio -- bailing.\n";
close(FIND);
exit 1;
}
while ( $name = <FIND> ) {
chop($name);
if ( $name =~ /$pattern/o ) { next; }
if ( $name =~ m:$archive_name:o ) {
print "\n* Skipping $archive_name\n";
next;
}
if ( -T $name ) {
if ( length($name) > 126 ) {
print "** Warning: pathname too long:\n $name\n - skipped\n";
next;
} else {
print(CPIO "$name\n");
}
}
}
close(CPIO);
close(FIND);
system "gzip -q -9 $archive_name";
print "\nBackup written to $archive_name.gz\n\n";
## Subroutines:
sub help {
print "\nThis is a wrapper for cpio. It automates backing up the text\n";
print "files in a directory, skipping obvious junk.\n";
print "Usage: backup [ -m | -t | -x ] <directory>\n";
print "With no switches, this creates a cpio archive of the specified\n";
print "directory in your home directory, and gzips it.\n";
print "\nCommand line options:\n";
print "-m <directory> archive rcs files only\n";
print "-t <archive> print table of contents\n";
print "-x <archive> extract archive in same directory as archive.\n";
print "-h\n";
print "--help print this message and quit\n";
print "-v\n";
print "--version print the version number and quit\n";
print "\nUnlike with tar, you may safely use full and relative pathnames\n";
print "to specify the directory to be backed up. `backup -x` will always\n";
print "place the extracted directory in the same directory as the archive\n";
print "file; use `backup -t | more` first if you are not absolutely sure\n";
print "that that won't overwrite something you want.\n";
print "You can change the name of the archive file without adverse effect,\n";
print "provided you leave the '.gz'.\n\n"
}
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