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1 | #!/usr/bin/perl |
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2 | 'di'; |
| 3 | 'ig00'; |
| 4 | # |
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5 | # $Header: relink,v 4.0 91/03/20 01:11:40 lwall Locked $ |
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6 | # |
| 7 | # $Log: relink,v $ |
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8 | # Revision 4.0 91/03/20 01:11:40 lwall |
| 9 | # 4.0 baseline. |
| 10 | # |
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11 | # Revision 3.0.1.2 90/08/09 03:17:44 lwall |
| 12 | # patch19: added man page for relink and rename |
| 13 | # |
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14 | |
| 15 | ($op = shift) || die "Usage: relink perlexpr [filenames]\n"; |
| 16 | if (!@ARGV) { |
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17 | @ARGV = <STDIN>; |
| 18 | chop(@ARGV); |
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19 | } |
| 20 | for (@ARGV) { |
| 21 | next unless -l; # symbolic link? |
| 22 | $name = $_; |
| 23 | $_ = readlink($_); |
| 24 | $was = $_; |
| 25 | eval $op; |
| 26 | die $@ if $@; |
| 27 | if ($was ne $_) { |
| 28 | unlink($name); |
| 29 | symlink($_, $name); |
| 30 | } |
| 31 | } |
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32 | ############################################################################## |
| 33 | |
| 34 | # These next few lines are legal in both Perl and nroff. |
| 35 | |
| 36 | .00; # finish .ig |
| 37 | |
| 38 | 'di \" finish diversion--previous line must be blank |
| 39 | .nr nl 0-1 \" fake up transition to first page again |
| 40 | .nr % 0 \" start at page 1 |
| 41 | ';<<'.ex'; #__END__ ############# From here on it's a standard manual page ############ |
| 42 | .TH RELINK 1 "July 30, 1990" |
| 43 | .AT 3 |
| 44 | .SH LINK |
| 45 | relink \- relinks multiple symbolic links |
| 46 | .SH SYNOPSIS |
| 47 | .B relink perlexpr [symlinknames] |
| 48 | .SH DESCRIPTION |
| 49 | .I Relink |
| 50 | relinks the symbolic links given according to the rule specified as the |
| 51 | first argument. |
| 52 | The argument is a Perl expression which is expected to modify the $_ |
| 53 | string in Perl for at least some of the names specified. |
| 54 | For each symbolic link named on the command line, the Perl expression |
| 55 | will be executed on the contents of the symbolic link with that name. |
| 56 | If a given symbolic link's contents is not modified by the expression, |
| 57 | it will not be changed. |
| 58 | If a name given on the command line is not a symbolic link, it will be ignored. |
| 59 | If no names are given on the command line, names will be read |
| 60 | via standard input. |
| 61 | .PP |
| 62 | For example, to relink all symbolic links in the current directory |
| 63 | pointing to somewhere in X11R3 so that they point to X11R4, you might say |
| 64 | .nf |
| 65 | |
| 66 | relink 's/X11R3/X11R4/' * |
| 67 | |
| 68 | .fi |
| 69 | To change all occurences of links in the system from /usr/spool to /var/spool, |
| 70 | you'd say |
| 71 | .nf |
| 72 | |
| 73 | find / -type l -print | relink 's#/usr/spool#/var/spool#' |
| 74 | |
| 75 | .fi |
| 76 | .SH ENVIRONMENT |
| 77 | No environment variables are used. |
| 78 | .SH FILES |
| 79 | .SH AUTHOR |
| 80 | Larry Wall |
| 81 | .SH "SEE ALSO" |
| 82 | ln(1) |
| 83 | .br |
| 84 | perl(1) |
| 85 | .SH DIAGNOSTICS |
| 86 | If you give an invalid Perl expression you'll get a syntax error. |
| 87 | .SH BUGS |
| 88 | .ex |
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