| 1 | #! /usr/bin/perl |
| 2 | |
| 3 | # $RCSfile: gsh,v $$Revision: 4.1 $$Date: 92/08/07 17:20:20 $ |
| 4 | |
| 5 | # Do rsh globally--see man page |
| 6 | |
| 7 | $SIG{'QUIT'} = 'quit'; # install signal handler for SIGQUIT |
| 8 | |
| 9 | sub getswitches { |
| 10 | while ($ARGV[0] =~ /^-/) { # parse switches |
| 11 | $ARGV[0] =~ /^-h/ && ($showhost++,$silent++,shift(@ARGV),next); |
| 12 | $ARGV[0] =~ /^-s/ && ($silent++,shift(@ARGV),next); |
| 13 | $ARGV[0] =~ /^-d/ && ($dodist++,shift(@ARGV),next); |
| 14 | $ARGV[0] =~ /^-n/ && ($n=' -n',shift(@ARGV),next); |
| 15 | $ARGV[0] =~ /^-l/ && ($l=' -l ' . $ARGV[1],shift(@ARGV),shift(@ARGV), |
| 16 | next); |
| 17 | last; |
| 18 | } |
| 19 | } |
| 20 | |
| 21 | do getswitches(); # get any switches before class |
| 22 | $systype = shift; # get name representing set of hosts |
| 23 | do getswitches(); # same switches allowed after class |
| 24 | |
| 25 | if ($dodist) { # distribute input over all rshes? |
| 26 | `cat >/tmp/gsh$$`; # get input into a handy place |
| 27 | $dist = " </tmp/gsh$$"; # each rsh takes input from there |
| 28 | } |
| 29 | |
| 30 | $cmd = join(' ',@ARGV); # remaining args constitute the command |
| 31 | $cmd =~ s/'/'"'"'/g; # quote any embedded single quotes |
| 32 | |
| 33 | $one_of_these = ":$systype:"; # prepare to expand "macros" |
| 34 | $one_of_these =~ s/\+/:/g; # we hope to end up with list of |
| 35 | $one_of_these =~ s/-/:-/g; # colon separated attributes |
| 36 | |
| 37 | @ARGV = (); |
| 38 | push(@ARGV,'.grem') if -f '.grem'; |
| 39 | push(@ARGV,'.ghosts') if -f '.ghosts'; |
| 40 | push(@ARGV,'/etc/ghosts'); |
| 41 | |
| 42 | $remainder = ''; |
| 43 | |
| 44 | line: while (<>) { # for each line of ghosts |
| 45 | |
| 46 | s/[ \t]*\n//; # trim trailing whitespace |
| 47 | if (!$_ || /^#/) { # skip blank line or comment |
| 48 | next line; |
| 49 | } |
| 50 | |
| 51 | if (/^(\w+)=(.+)/) { # a macro line? |
| 52 | $name = $1; $repl = $2; |
| 53 | $repl =~ s/\+/:/g; |
| 54 | $repl =~ s/-/:-/g; |
| 55 | $one_of_these =~ s/:$name:/:$repl:/; # do expansion in "wanted" list |
| 56 | $repl =~ s/:/:-/g; |
| 57 | $one_of_these =~ s/:-$name:/:-$repl:/; |
| 58 | next line; |
| 59 | } |
| 60 | |
| 61 | # we have a normal line |
| 62 | |
| 63 | @attr = split(' '); # a list of attributes to match against |
| 64 | # which we put into an array |
| 65 | $host = $attr[0]; # the first attribute is the host name |
| 66 | if ($showhost) { |
| 67 | $showhost = "$host:\t"; |
| 68 | } |
| 69 | |
| 70 | $wanted = 0; |
| 71 | foreach $attr (@attr) { # iterate over attribute array |
| 72 | $wanted++ if index($one_of_these,":$attr:") >= 0; |
| 73 | $wanted = -9999 if index($one_of_these,":-$attr:") >= 0; |
| 74 | } |
| 75 | if ($wanted > 0) { |
| 76 | print "rsh $host$l$n '$cmd'\n" unless $silent; |
| 77 | $SIG{'INT'} = 'DEFAULT'; |
| 78 | if (open(PIPE,"rsh $host$l$n '$cmd'$dist 2>&1|")) { # start an rsh |
| 79 | $SIG{'INT'} = 'cont'; |
| 80 | for ($iter=0; <PIPE>; $iter++) { |
| 81 | unless ($iter) { |
| 82 | $remainder .= "$host+" |
| 83 | if /Connection timed out|Permission denied/; |
| 84 | } |
| 85 | print $showhost,$_; |
| 86 | } |
| 87 | close(PIPE); |
| 88 | } else { |
| 89 | print "(Can't execute rsh: $!)\n"; |
| 90 | $SIG{'INT'} = 'cont'; |
| 91 | } |
| 92 | } |
| 93 | } |
| 94 | |
| 95 | unlink "/tmp/gsh$$" if $dodist; |
| 96 | |
| 97 | if ($remainder) { |
| 98 | chop($remainder); |
| 99 | open(grem,">.grem") || (printf stderr "Can't make a .grem file: $!\n"); |
| 100 | print grem 'rem=', $remainder, "\n"; |
| 101 | close(grem); |
| 102 | print 'rem=', $remainder, "\n"; |
| 103 | } |
| 104 | |
| 105 | # here are a couple of subroutines that serve as signal handlers |
| 106 | |
| 107 | sub cont { |
| 108 | print "\rContinuing...\n"; |
| 109 | $remainder .= "$host+"; |
| 110 | } |
| 111 | |
| 112 | sub quit { |
| 113 | $| = 1; |
| 114 | print "\r"; |
| 115 | $SIG{'INT'} = ''; |
| 116 | kill 2, $$; |
| 117 | } |