summaryrefslogtreecommitdiff
path: root/mysql-test/lib/mtr_io.pl
blob: 6a6b3a3d028ebbcb913952f1388253b479ea22dc (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
# -*- cperl -*-
# Copyright (C) 2004-2007 MySQL AB, 2008 Sun Microsystems, Inc.
# 
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; version 2 of the License.
# 
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
# 
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA

# This is a library file used by the Perl version of mysql-test-run,
# and is part of the translation of the Bourne shell script with the
# same name.

use strict;
use Carp;

sub mtr_fromfile ($);
sub mtr_tofile ($@);
sub mtr_tonewfile($@);
sub mtr_appendfile_to_file ($$);
sub mtr_grab_file($);
sub mtr_printfile($);
sub mtr_lastlinesfromfile ($$);

# Read a whole file, stripping leading and trailing whitespace.
sub mtr_fromfile ($) {
  my $file=  shift;

  open(FILE,"<",$file) or mtr_error("can't open file \"$file\": $!");
  my $text= join('', <FILE>);
  close FILE;
  $text =~ s/^\s+//;                    # Remove starting space, incl newlines
  $text =~ s/\s+$//;                    # Remove ending space, incl newlines
  return $text;
}


sub mtr_tofile ($@) {
  my $file=  shift;

  open(FILE,">>",$file) or mtr_error("can't open file \"$file\": $!");
  print FILE join("", @_);
  close FILE;
}


sub mtr_tonewfile ($@) {
  my $file=  shift;

  open(FILE,">",$file) or mtr_error("can't open file \"$file\": $!");
  print FILE join("", @_);
  close FILE;
}


sub mtr_appendfile_to_file ($$) {
  my $from_file=  shift;
  my $to_file=  shift;

  open(TOFILE,">>",$to_file) or mtr_error("can't open file \"$to_file\": $!");
  open(FROMFILE,"<",$from_file)
    or mtr_error("can't open file \"$from_file\": $!");
  print TOFILE while (<FROMFILE>);
  close FROMFILE;
  close TOFILE;
}


# Read a whole file verbatim.
sub mtr_grab_file($) {
  my $file= shift;
  open(FILE, '<', $file)
    or return undef;
  local $/= undef;
  my $data= scalar(<FILE>);
  close FILE;
  return $data;
}


# Print the file to STDOUT
sub mtr_printfile($) {
  my $file= shift;
  open(FILE, '<', $file)
    or warn $!;
  print while(<FILE>);
  close FILE;
  return;
}

sub mtr_lastlinesfromfile ($$) {
  croak "usage: mtr_lastlinesfromfile(file,numlines)" unless (@_ == 2);
  my ($file, $num_lines)= @_; 
  my $text;
  open(FILE,"<",$file) or mtr_error("can't open file \"$file\": $!");
  my @lines= reverse <FILE>;
  close FILE;
  my $size= scalar(@lines);
  $num_lines= $size unless ($size >= $num_lines);
  return join("", reverse(splice(@lines, 0, $num_lines)));
}

1;