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a0d0e21e LW |
1 | # |
2 | # @(#)dotsh.pl 03/19/94 | |
3 | # | |
4 | # Author: Charles Collins | |
5 | # | |
6 | # Description: | |
7 | # This routine takes a shell script and 'dots' it into the current perl | |
8 | # environment. This makes it possible to use existing system scripts | |
9 | # to alter environment variables on the fly. | |
10 | # | |
11 | # Usage: | |
12 | # &dotsh ('ShellScript', 'DependentVariable(s)'); | |
13 | # | |
14 | # where | |
15 | # | |
16 | # 'ShellScript' is the full name of the shell script to be dotted | |
17 | # | |
18 | # 'DependentVariable(s)' is an optional list of shell variables in the | |
19 | # form VARIABLE=VALUE,VARIABLE=VALUE,... that 'ShellScript' is | |
20 | # dependent upon. These variables MUST be defined using shell syntax. | |
21 | # | |
22 | # Example: | |
23 | # &dotsh ('/tmp/foo', 'arg1'); | |
24 | # &dotsh ('/tmp/foo'); | |
25 | # &dotsh ('/tmp/foo arg1 ... argN'); | |
26 | # | |
27 | sub dotsh { | |
28 | local(@sh) = @_; | |
29 | local($tmp,$key,$shell,*dotsh,$command,$args,$vars) = ''; | |
30 | $dotsh = shift(@sh); | |
31 | @dotsh = split (/\s/, $dotsh); | |
32 | $command = shift (@dotsh); | |
33 | $args = join (" ", @dotsh); | |
34 | $vars = join ("\n", @sh); | |
35 | open (_SH_ENV, "$command") || die "Could not open $dotsh!\n"; | |
36 | chop($_ = <_SH_ENV>); | |
37 | $shell = "$1 -c" if ($_ =~ /^\#\!\s*(\S+(\/sh|\/ksh|\/zsh|\/csh))\s*$/); | |
38 | close (_SH_ENV); | |
39 | if (!$shell) { | |
40 | if ($ENV{'SHELL'} =~ /\/sh$|\/ksh$|\/zsh$|\/csh$/) { | |
41 | $shell = "$ENV{'SHELL'} -c"; | |
42 | } else { | |
43 | print "SHELL not recognized!\nUsing /bin/sh...\n"; | |
44 | $shell = "/bin/sh -c"; | |
45 | } | |
46 | } | |
47 | if (length($vars) > 0) { | |
48 | system "$shell \"$vars;. $command $args; set > /tmp/_sh_env$$\""; | |
49 | } else { | |
50 | system "$shell \". $command $args; set > /tmp/_sh_env$$\""; | |
51 | } | |
52 | ||
53 | open (_SH_ENV, "/tmp/_sh_env$$") || die "Could not open /tmp/_sh_env$$!\n"; | |
54 | while (<_SH_ENV>) { | |
55 | chop; | |
3730ca99 | 56 | m/^([^=]*)=(.*)/s; |
57 | $ENV{$1} = $2; | |
a0d0e21e LW |
58 | } |
59 | close (_SH_ENV); | |
60 | system "rm -f /tmp/_sh_env$$"; | |
61 | ||
4633a7c4 | 62 | foreach $key (keys(%ENV)) { |
a0d0e21e LW |
63 | $tmp .= "\$$key = \$ENV{'$key'};" if $key =~ /^[A-Za-z]\w*$/; |
64 | } | |
65 | eval $tmp; | |
66 | } | |
67 | 1; |