drakx - Mageia Installer and base platform for many utilities

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Mageia Installer and base platform for many utilities

Thierry Vignaud [tv]

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path: root/perl-install/lang.pm

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perl-install/lang.pm

1 files changed, 2 insertions, 2 deletions

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package commands; # $Id$

#-########################################################################
#- This file implement many common shell commands:
#- true, false, cat, which, dirname, basename, rmdir, lsmod, grep, tr,
#- mount, umount, mkdir, mknod, ln, rm, chmod, chown, swapon,
#- swapoff, ls, cp, ps, dd, head, tail, strings, hexdump, more, insmod,
#- modprobe, route, df, kill, lspci, lssbus, dmesg, sort, du, 
#-########################################################################

use diagnostics;
use strict;
use vars qw($printable_chars *ROUTE *DF *PS);

#-######################################################################################
#- misc imports
#-######################################################################################
use MDK::Common::System;
use common;

#-######################################################################################
#- Functions
#-######################################################################################
sub getopts {
    my $o = shift;
    my @r = map { '' } (@_ = split //, $_[0]);
    while (1) {
	local $_ = $o->[0];
	$_ && /^-/ or return @r;
	for (my $i = 0; $i < @_; $i++) { /$_[$i]/ and $r[$i] = $_[$i] }
	shift @$o;
    }
    @r;
}

sub true() { exit 0 }
sub false() { exit 1 }
sub cat { @ARGV = @_; print while <> }
sub dirname_ { print dirname(@_), "\n" }
sub basename_ { print basename(@_), "\n" }
sub rmdir_ { foreach (@_) { rmdir $_ or die "rmdir: can't remove $_\n" } }
sub lsmod() { print "Module                  Size  Used by\n"; cat("/proc/modules") }
sub which { 
  ARG: foreach (@_) { foreach my $c (split /:/, $ENV{PATH}) { -x "$c/$_" and print("$c/$_\n"), next ARG } }
}

sub grep_ {
    my ($h, $v, $i) = getopts(\@_, qw(hvi));
    @_ == 0 || $h and die "usage: grep <regexp> [files...]\n";
    my $r = shift;
    $r = qr/$r/i if $i;
    @ARGV = @_; (/$r/ xor $v) and print while <>;
}

sub tr_ {
    my ($s, $c, $d) = getopts(\@_, qw(s c d));
    @_ >= 1 + (!$d || $s) or die "usage: tr [-c] [-s [-d]] <set1> <set2> [files...]\n    or tr [-c] -d <set1> [files...]\n";
    my $set1 = shift;
    my $set2; !$d || $s and $set2 = shift;
    @ARGV = @_;
    eval "(tr/$set1/$set2/$s$d$c, print) while <>";
}

sub mount {
    @_ or return cat("/proc/mounts");
    my ($t, $r) = getopts(\@_, qw(tr));
    my $fs = $t && shift;

    @_ == 2 or die "usage: mount [-r] [-t <fs>] <device> <dir>\n",
    "       (use -r for readonly)\n",
    "       (if /dev/ is left off the device name, a temporary node will be created)\n";

    my ($dev, $where) = @_;
    $fs ||= $where =~ /:/ ? "nfs" :
            $dev =~ /fd/ ? "vfat" : "ext2";

    require fs;
    require modules;
    modules::load_dependencies("/modules/modules.dep");
    fs::mount($dev, $where, $fs, $r);
}

sub umount {
    @_ == 1 or die "umount expects a single argument\n";

    require fs;
    fs::umount($_[0]);
}

sub mkdir_ {
    my ($_rec) = getopts(\@_, qw(p));
    mkdir_p($_) foreach @_;
}


sub mknod {
    if (@_ == 1) {
	require devices;
	eval { devices::make($_[0]) }; $@ and die "mknod: failed to create $_[0]\n";
    } elsif (@_ == 4) {
	require c;
	my $mode = ${{ "b" => c::S_IFBLK(), "c" => c::S_IFCHR() }}{$_[1]} or die "unknown node type $_[1]\n";
	syscall_('mknod', my $_a = $_[0], $mode | 0600, makedev($_[2], $_[3])) or die "mknod failed: $!\n";
    } else { die "usage: mknod <path> [b|c] <major> <minor> or mknod <path>\n" }
}

sub ln {
    my ($force, $soft) = getopts(\@_, qw(fs));
    @_ >= 1 or die "usage: ln [-s] [-f] <source> [<dest>]\n";

    my ($source, $dest) = @_;
    $dest ||= basename($source);

    $force and unlink $dest;

    ($soft ? symlink($source, $dest) : link($source, $dest)) or die "ln failed: $!\n";
}

sub rm {
    my ($rec, undef) = getopts(\@_, qw(rf));

    my $rm; $rm = sub {
	foreach (@_) {
	    if (!-l $_ && -d $_) {
		$rec or die "$_ is a directory\n";
		&$rm(glob_($_));
		rmdir $_ or die "can't remove directory $_: $!\n";
	    } else { unlink $_ or die "rm of $_ failed: $!\n" }
	}
    };
    &$rm(@_);
}

sub chmod_ {
    @_ >= 2 or die "usage: chmod <mode> <files>\n";

    my $mode = shift;
    $mode =~ /^[0-7]+$/ or die "illegal mode $mode\n";

    foreach (@_) { chmod oct($mode), $_ or die "chmod failed $_: $!\n" }
}

sub chown_ {
    my ($rec, undef) = getopts(\@_, qw(r));
    local $_ = shift or die "usage: chown [-r] name[.group] <files>\n";

    my ($name, $group) = (split('\.'), $_);

    my ($uid, $gid) = (getpwnam($name) || $name, getgrnam($group) || $group);

    my $chown; $chown = sub {
	foreach (@_) {
	    chown $uid, $gid, $_ or die "chown of file $_ failed: $!\n";
	    -d $_ && $rec and &$chown(glob_($_));
	}
    };
    &$chown(@_);
}

sub swapon {
    @_ == 1 or die "swapon <file>\n";
    require swap;
    swap::swapon($_[0]);
}
sub swapoff {
    @_ == 1 or die "swapoff <file>\n";
    require swap;
    swap::swapoff($_[0]);
}

sub uncpio {
    @_ and die "uncpio reads from stdin\n";

#    cpioInstallArchive(gzdopen(0, "r"), NULL, 0, NULL, NULL, &fail);
}


sub rights {
    my $r = '-' x 9;
    my @rights = (qw(x w r x w r x w r), ['t', 0], ['s', 3], ['s', 6]);
    for (my $i = 0; $i < @rights; $i++) {
	if (vec(pack("S", $_[0]), $i, 1)) {
	    my ($val, $place) = $i >= 9 ? @{$rights[$i]} : ($rights[$i], $i);
	    my $old = \substr($r, 8 - $place, 1);
	    $$old = $$old eq '-' && $i >= 9 ? uc $val : $val;
	}
    }
    my @types = split //, "_pc_d_b_-_l_s";
    $types[($_[0] >> 12) & 0xf] . $r;
}

sub displaySize {
    my $m = $_[0] >> 12;
    $m == 4 || $m == 8 || $m == 10;
}

sub ls {
    my ($l, $h) = getopts(\@_, qw(lh));
    $h and die "usage: ls [-l] <files...>\n";

    @_ or @_ = '.';
    @_ == 1 && -d $_[0] and @_ = glob_($_[0]);
    foreach (sort @_) {
	if ($l) {
	    my @s = lstat or warn("can't stat file $_\n"), next;
	    formline(
"@<<<<<<<<< @<<<<<<< @<<<<<<< @>>>>>>>> @>>>>>>>>>>>>>>> @*\n",
		     rights($s[2]), getpwuid $s[4] || $s[4], getgrgid $s[5] || $s[5],
		     displaySize($s[2]) ? $s[7] : join(", ", unmakedev($s[6])),
		     scalar localtime $s[9], -l $_ ? "$_ -> " . readlink $_ : $_);
	    print $^A; $^A = '';
	} else { print "$_\n" }
    }
}
sub cp {
    @_ >= 2 or die "usage: cp <sources> <dest>\n(this cp does -Rfl by default)\n";
    cp_af(@_);
}

sub ps {
    @_ and die "usage: ps\n";
    my ($pid, $rss, $cpu, $cmd);
    my ($uptime) = split ' ', first(cat_("/proc/uptime"));
    my $hertz = 100;

    require c;
    my $page = c::getpagesize() / 1024;

    open PS, ">&STDOUT"; #- PS must be not be localised otherwise the "format PS" fails
    format PS_TOP =
  PID   RSS %CPU CMD
.
    format PS =
@>>>> @>>>> @>>> @<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
$pid, $rss, $cpu, $cmd
.
    foreach (sort { $a <=> $b } grep { /\d+/ } all('/proc')) {
	$pid = $_;
	my @l = split(' ', cat_("/proc/$pid/stat"));
	$cpu = sprintf "%2.1f", max(0, min(99, ($l[13] + $l[14]) * 100 / $hertz / ($uptime - $l[21] / $hertz)));
	$rss = (split ' ', cat_("/proc/$pid/stat"))[23] * $page;
	($cmd = cat_("/proc/$pid/cmdline")) =~ s/\0/ /g;
	$cmd ||= (split ' ', (cat_("/proc/$pid/stat"))[0])[1];
	write PS;
    }
}


sub dd {
    my $u = "usage: dd [-h] [-p] [if=<file>] [of=<file>] [bs=<number>] [count=<number>]\n";
    my ($help, $percent) = getopts(\@_, qw(hp));
    die $u if $help;
    my %h = (if => *STDIN, of => *STDOUT, bs => 512, count => undef);
    foreach (@_) {
	/(.*?)=(.*)/ && exists $h{$1} or die $u;
	$h{$1} = $2;
    }
    local (*IF, *OF); my ($tmp, $nb, $read);


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