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1 | #!/usr/bin/perl |
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2 | 'di'; |
3 | 'ig00'; |
4 | # |
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5 | # $RCSfile: relink,v $$Revision: 4.1 $$Date: 92/08/07 17:20:29 $ |
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6 | # |
7 | # $Log: relink,v $ |
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8 | # Revision 4.1 92/08/07 17:20:29 lwall |
9 | # Stage 6 Snapshot |
10 | # |
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11 | # Revision 4.0 91/03/20 01:11:40 lwall |
12 | # 4.0 baseline. |
13 | # |
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14 | # Revision 3.0.1.2 90/08/09 03:17:44 lwall |
15 | # patch19: added man page for relink and rename |
16 | # |
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17 | |
18 | ($op = shift) || die "Usage: relink perlexpr [filenames]\n"; |
19 | if (!@ARGV) { |
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20 | @ARGV = <STDIN>; |
21 | chop(@ARGV); |
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22 | } |
23 | for (@ARGV) { |
24 | next unless -l; # symbolic link? |
25 | $name = $_; |
26 | $_ = readlink($_); |
27 | $was = $_; |
28 | eval $op; |
29 | die $@ if $@; |
30 | if ($was ne $_) { |
31 | unlink($name); |
32 | symlink($_, $name); |
33 | } |
34 | } |
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35 | ############################################################################## |
36 | |
37 | # These next few lines are legal in both Perl and nroff. |
38 | |
39 | .00; # finish .ig |
40 | |
41 | 'di \" finish diversion--previous line must be blank |
42 | .nr nl 0-1 \" fake up transition to first page again |
43 | .nr % 0 \" start at page 1 |
44 | ';<<'.ex'; #__END__ ############# From here on it's a standard manual page ############ |
45 | .TH RELINK 1 "July 30, 1990" |
46 | .AT 3 |
47 | .SH LINK |
48 | relink \- relinks multiple symbolic links |
49 | .SH SYNOPSIS |
50 | .B relink perlexpr [symlinknames] |
51 | .SH DESCRIPTION |
52 | .I Relink |
53 | relinks the symbolic links given according to the rule specified as the |
54 | first argument. |
55 | The argument is a Perl expression which is expected to modify the $_ |
56 | string in Perl for at least some of the names specified. |
57 | For each symbolic link named on the command line, the Perl expression |
58 | will be executed on the contents of the symbolic link with that name. |
59 | If a given symbolic link's contents is not modified by the expression, |
60 | it will not be changed. |
61 | If a name given on the command line is not a symbolic link, it will be ignored. |
62 | If no names are given on the command line, names will be read |
63 | via standard input. |
64 | .PP |
65 | For example, to relink all symbolic links in the current directory |
66 | pointing to somewhere in X11R3 so that they point to X11R4, you might say |
67 | .nf |
68 | |
69 | relink 's/X11R3/X11R4/' * |
70 | |
71 | .fi |
72 | To change all occurences of links in the system from /usr/spool to /var/spool, |
73 | you'd say |
74 | .nf |
75 | |
76 | find / -type l -print | relink 's#/usr/spool#/var/spool#' |
77 | |
78 | .fi |
79 | .SH ENVIRONMENT |
80 | No environment variables are used. |
81 | .SH FILES |
82 | .SH AUTHOR |
83 | Larry Wall |
84 | .SH "SEE ALSO" |
85 | ln(1) |
86 | .br |
87 | perl(1) |
88 | .SH DIAGNOSTICS |
89 | If you give an invalid Perl expression you'll get a syntax error. |
90 | .SH BUGS |
91 | .ex |