155 lines
4.9 KiB
Perl
155 lines
4.9 KiB
Perl
#!/usr/bin/perl
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use strict;
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use lib '@TOP@/lib/perl';
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use Getopt::Std;
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use CA;
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our ($opt_0, $opt_a, $opt_C, $opt_d, $opt_e, $opt_f, $opt_g, $opt_h, $opt_n);
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our ($opt_s, $opt_t);
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our $opt_w = 1;
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$Getopt::Std::OUTPUT_HELP_VERSION = 1;
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HELP_MESSAGE() unless getopts('0:aC:d:e:f:g:hnstw:');
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HELP_MESSAGE() if $opt_h;
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$opt_d = "DBR_$opt_d" if $opt_d && $opt_d !~ m/^DBR_/;
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die "No pv name specified. ('caget -h' for help.)\n"
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unless @ARGV;
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my @chans = map { CA->new($_); } @ARGV;
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eval { CA->pend_io($opt_w); };
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if ($@) {
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if ($@ =~ m/^ECA_TIMEOUT/) {
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my $err = (@chans > 1) ? 'some PV(s)' : "'" . $chans[0]->name . "'";
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print "Channel connect timed out: $err not found.\n";
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@chans = grep { $_->is_connected } @chans;
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} else {
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die $@;
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}
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}
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my %rtype;
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map {
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my $type;
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if ($opt_d) {
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$type = $opt_d;
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} else {
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$type = $_->field_type;
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$type = 'DBR_STRING'
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if $opt_s && $type =~ m/ ^DBR_FLOAT$ | ^DBR_DOUBLE$ /x;
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$type = 'DBR_LONG'
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if $opt_n && $type eq 'DBR_ENUM';
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$type =~ s/^DBR_/DBR_TIME_/
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if $opt_a;
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}
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$rtype{$_} = $type;
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my $count = $_->element_count;
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$count = +$opt_C if $opt_C && $opt_C <= $count;
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$_->get_callback(\&get_callback, $type, $count);
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} @chans;
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my $incomplete = @chans;
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CA->pend_event(0.1) while $incomplete;
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sub get_callback {
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my ($chan, $status, $data) = @_;
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die $status if $status;
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display($chan, $rtype{$chan}, $data);
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$incomplete--;
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}
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sub format_number {
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my ($data, $type) = @_;
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if ($type =~ m/_DOUBLE$/) {
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return sprintf "%.${opt_e}e", $data if $opt_e;
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return sprintf "%.${opt_f}f", $data if $opt_f;
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return sprintf "%.${opt_g}g", $data if $opt_g;
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}
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if ($type =~ m/_LONG$/) {
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return sprintf "%lx", $data if $opt_0 eq 'x';
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return sprintf "%lo", $data if $opt_0 eq 'o';
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if ($opt_0 eq 'b') {
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my $bin = unpack "B*", pack "l", $data;
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$bin =~ s/^0*//;
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return $bin;
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}
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}
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return $data;
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}
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sub display {
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my ($chan, $type, $data) = @_;
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if (ref $data eq 'ARRAY') {
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display($chan, $type, join(' ', scalar @{$data}, @{$data}));
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} elsif (ref $data eq 'HASH') {
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$type = $data->{TYPE}; # Can differ from request
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my $value = $data->{value};
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if (ref $value eq 'ARRAY') {
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$value = join(' ', $data->{COUNT},
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map { format_number($_, $type); } @{$value});
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} else {
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$value = format_number($value, $type);
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}
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my $stamp;
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if (exists $data->{stamp}) {
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my @t = localtime $data->{stamp};
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splice @t, 6;
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$t[5] += 1900;
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$t[0] += $data->{stamp_fraction};
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$stamp = sprintf "%4d-%02d-%02d %02d:%02d:%09.6f", reverse @t;
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}
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printf "%-30s %s %s %s %s\n", $chan->name,
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$stamp, $value, $data->{status}, $data->{severity};
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} else {
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my $value = format_number($data, $type);
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if ($opt_t) {
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print "$value\n";
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} else {
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printf "%-30s %s\n", $chan->name, $value;
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}
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}
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}
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sub HELP_MESSAGE {
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print STDERR "\nUsage: caget [options] <PV name> ...\n",
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"\n",
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" -h: Help: Print this message\n",
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"Channel Access options:\n",
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" -w <sec>: Wait time, specifies longer CA timeout, default is $opt_w second\n",
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"Format options:\n",
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" -t: Terse mode - print only value, without name\n",
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" -a: Wide mode \"name timestamp value stat sevr\" (read PVs as DBR_TIME_xxx)\n",
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" -d <type>: Request specific dbr type from one of the following:\n",
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" DBR_STRING DBR_LONG DBR_DOUBLE\n",
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" DBR_STS_STRING DBR_STS_LONG DBR_STS_DOUBLE\n",
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" DBR_TIME_STRING DBR_TIME_LONG DBR_TIME_DOUBLE\n",
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" DBR_GR_STRING DBR_GR_LONG DBR_GR_DOUBLE DBR_GR_ENUM\n",
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" DBR_CTRL_STRING DBR_CTRL_LONG DBR_CTRL_DOUBLE DBR_CTRL_ENUM\n",
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" DBR_CLASS_NAME DBR_STSACK_STRING\n",
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"Arrays: Value format: print number of values, then list of values\n",
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" Default: Print all values\n",
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" -C <count>: Print first <count> elements of an array\n",
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"Enum format:\n",
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" -n: Print DBF_ENUM value as number (default is enum string)\n",
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"Floating point type format:\n",
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" Default: Use %g format\n",
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" -e <nr>: Use %e format, with a precision of <nr> digits\n",
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" -f <nr>: Use %f format, with a precision of <nr> digits\n",
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" -g <nr>: Use %g format, with a precision of <nr> digits\n",
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" -s: Get value as string (may honour server-side precision)\n",
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"Integer number format:\n",
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" Default: Print as decimal number\n",
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" -0x: Print as hex number\n",
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" -0o: Print as octal number\n",
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" -0b: Print as binary number\n",
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"\n";
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exit 1;
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}
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