Commit | Line | Data |
9f68db38 |
1 | #!/usr/bin/perl |
00bf170e |
2 | 'di'; |
3 | 'ig00'; |
4 | # |
79072805 |
5 | # $RCSfile: relink,v $$Revision: 4.1 $$Date: 92/08/07 17:20:29 $ |
00bf170e |
6 | # |
7 | # $Log: relink,v $ |
9f68db38 |
8 | |
9 | ($op = shift) || die "Usage: relink perlexpr [filenames]\n"; |
10 | if (!@ARGV) { |
00bf170e |
11 | @ARGV = <STDIN>; |
12 | chop(@ARGV); |
9f68db38 |
13 | } |
14 | for (@ARGV) { |
15 | next unless -l; # symbolic link? |
16 | $name = $_; |
17 | $_ = readlink($_); |
18 | $was = $_; |
19 | eval $op; |
20 | die $@ if $@; |
21 | if ($was ne $_) { |
22 | unlink($name); |
23 | symlink($_, $name); |
24 | } |
25 | } |
00bf170e |
26 | ############################################################################## |
27 | |
28 | # These next few lines are legal in both Perl and nroff. |
29 | |
30 | .00; # finish .ig |
31 | |
32 | 'di \" finish diversion--previous line must be blank |
33 | .nr nl 0-1 \" fake up transition to first page again |
34 | .nr % 0 \" start at page 1 |
35 | ';<<'.ex'; #__END__ ############# From here on it's a standard manual page ############ |
36 | .TH RELINK 1 "July 30, 1990" |
37 | .AT 3 |
38 | .SH LINK |
39 | relink \- relinks multiple symbolic links |
40 | .SH SYNOPSIS |
41 | .B relink perlexpr [symlinknames] |
42 | .SH DESCRIPTION |
43 | .I Relink |
44 | relinks the symbolic links given according to the rule specified as the |
45 | first argument. |
46 | The argument is a Perl expression which is expected to modify the $_ |
47 | string in Perl for at least some of the names specified. |
48 | For each symbolic link named on the command line, the Perl expression |
49 | will be executed on the contents of the symbolic link with that name. |
50 | If a given symbolic link's contents is not modified by the expression, |
51 | it will not be changed. |
52 | If a name given on the command line is not a symbolic link, it will be ignored. |
53 | If no names are given on the command line, names will be read |
54 | via standard input. |
55 | .PP |
56 | For example, to relink all symbolic links in the current directory |
57 | pointing to somewhere in X11R3 so that they point to X11R4, you might say |
58 | .nf |
59 | |
60 | relink 's/X11R3/X11R4/' * |
61 | |
62 | .fi |
63 | To change all occurences of links in the system from /usr/spool to /var/spool, |
64 | you'd say |
65 | .nf |
66 | |
67 | find / -type l -print | relink 's#/usr/spool#/var/spool#' |
68 | |
69 | .fi |
70 | .SH ENVIRONMENT |
71 | No environment variables are used. |
72 | .SH FILES |
73 | .SH AUTHOR |
74 | Larry Wall |
75 | .SH "SEE ALSO" |
76 | ln(1) |
77 | .br |
78 | perl(1) |
79 | .SH DIAGNOSTICS |
80 | If you give an invalid Perl expression you'll get a syntax error. |
81 | .SH BUGS |
82 | .ex |