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83 lines
2.1 KiB
Perl
83 lines
2.1 KiB
Perl
#!/usr/bin/perl
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'di';
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'ig00';
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#
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# $RCSfile: relink,v $$Revision: 4.1 $$Date: 92/08/07 17:20:29 $
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#
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# $Log: relink,v $
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($op = shift) || die "Usage: relink perlexpr [filenames]\n";
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if (!@ARGV) {
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@ARGV = <STDIN>;
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chop(@ARGV);
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}
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for (@ARGV) {
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next unless -l; # symbolic link?
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$name = $_;
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$_ = readlink($_);
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$was = $_;
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eval $op;
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die $@ if $@;
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if ($was ne $_) {
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unlink($name);
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symlink($_, $name);
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}
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}
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##############################################################################
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# These next few lines are legal in both Perl and nroff.
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.00; # finish .ig
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'di \" finish diversion--previous line must be blank
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.nr nl 0-1 \" fake up transition to first page again
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.nr % 0 \" start at page 1
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';<<'.ex'; #__END__ ############# From here on it's a standard manual page ############
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.TH RELINK 1 "July 30, 1990"
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.AT 3
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.SH LINK
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relink \- relinks multiple symbolic links
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.SH SYNOPSIS
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.B relink perlexpr [symlinknames]
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.SH DESCRIPTION
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.I Relink
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relinks the symbolic links given according to the rule specified as the
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first argument.
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The argument is a Perl expression which is expected to modify the $_
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string in Perl for at least some of the names specified.
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For each symbolic link named on the command line, the Perl expression
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will be executed on the contents of the symbolic link with that name.
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If a given symbolic link's contents is not modified by the expression,
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it will not be changed.
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If a name given on the command line is not a symbolic link, it will be ignored.
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If no names are given on the command line, names will be read
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via standard input.
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.PP
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For example, to relink all symbolic links in the current directory
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pointing to somewhere in X11R3 so that they point to X11R4, you might say
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.nf
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relink 's/X11R3/X11R4/' *
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.fi
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To change all occurences of links in the system from /usr/spool to /var/spool,
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you'd say
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.nf
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find / -type l -print | relink 's#/usr/spool#/var/spool#'
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.fi
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.SH ENVIRONMENT
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No environment variables are used.
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.SH FILES
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.SH AUTHOR
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Larry Wall
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.SH "SEE ALSO"
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ln(1)
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.br
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perl(1)
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.SH DIAGNOSTICS
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If you give an invalid Perl expression you'll get a syntax error.
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.SH BUGS
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.ex
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