Fix whitespace difference between blead and upstream in MM_Unix.pm

[perl5.git] / lib / dotsh.pl

diff --git a/lib/dotsh.pl b/lib/dotsh.pl
index 877467e..810ebc4 100644 (file)
--- a/lib/dotsh.pl
+++ b/lib/dotsh.pl
@@ -1,6 +1,13 @@
 #
 #   @(#)dotsh.pl                                               03/19/94
 #
+# This library is no longer being maintained, and is included for backward
+# compatibility with Perl 4 programs which may require it.
+#
+# In particular, this should not be used as an example of modern Perl
+# programming techniques.
+#
+#
 #   Author: Charles Collins
 #
 #   Description:
@@ -20,13 +27,15 @@
 #         dependent upon. These variables MUST be defined using shell syntax.
 #
 #   Example:
-#      &dotsh ('/tmp/foo', 'arg1');
-#      &dotsh ('/tmp/foo');
-#      &dotsh ('/tmp/foo arg1 ... argN');
+#      &dotsh ('/foo/bar', 'arg1');
+#      &dotsh ('/foo/bar');
+#      &dotsh ('/foo/bar arg1 ... argN');
 #
 sub dotsh {
    local(@sh) = @_;
-   local($tmp,$key,$shell,*dotsh,$command,$args,$vars) = '';
+   local($tmp,$key,$shell,$command,$args,$vars) = '';
+   local(*dotsh);
+   undef *dotsh;
    $dotsh = shift(@sh);
    @dotsh = split (/\s/, $dotsh);
    $command = shift (@dotsh);
@@ -37,7 +46,7 @@ sub dotsh {
    $shell = "$1 -c" if ($_ =~ /^\#\!\s*(\S+(\/sh|\/ksh|\/zsh|\/csh))\s*$/);
    close (_SH_ENV);
    if (!$shell) {
-      if ($ENV{'SHELL'} =~ /\/sh$|\/ksh$|\/zsh$|\/csh$/) {
+      if ($ENV{'SHELL'} =~ /\/sh$|\/ksh$|\/zsh$|\/bash$|\/csh$/) {
         $shell = "$ENV{'SHELL'} -c";
       } else {
         print "SHELL not recognized!\nUsing /bin/sh...\n";
@@ -45,19 +54,17 @@ sub dotsh {
       }
    }
    if (length($vars) > 0) {
-      system "$shell \"$vars;. $command $args; set > /tmp/_sh_env$$\"";
+      open (_SH_ENV, "$shell \"$vars && . $command $args && set \" |") || die;
    } else {
-      system "$shell \". $command $args; set > /tmp/_sh_env$$\"";
+      open (_SH_ENV, "$shell \". $command $args && set \" |") || die;
    }
 
-   open (_SH_ENV, "/tmp/_sh_env$$") || die "Could not open /tmp/_sh_env$$!\n";
    while (<_SH_ENV>) {
        chop;
        m/^([^=]*)=(.*)/s;
        $ENV{$1} = $2;
    }
    close (_SH_ENV);
-   system "rm -f /tmp/_sh_env$$";
 
    foreach $key (keys(%ENV)) {
        $tmp .= "\$$key = \$ENV{'$key'};" if $key =~ /^[A-Za-z]\w*$/;