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1 | # NOTE: this file tests how large files (>2GB) work with perlio (stdio/sfio). |
2 | # sysopen(), sysseek(), syswrite(), sysread() are tested in t/lib/syslfs.t. |
3 | # If you modify/add tests here, remember to update also t/lib/syslfs.t. |
4 | |
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5 | BEGIN { |
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6 | # Don't bother if there are no quads. |
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7 | eval { my $q = pack "q", 0 }; |
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8 | if ($@) { |
9 | print "1..0\n# no 64-bit types\n"; |
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10 | exit(0); |
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11 | } |
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12 | chdir 't' if -d 't'; |
13 | unshift @INC, '../lib'; |
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14 | # Don't bother if there are no quad offsets. |
15 | require Config; import Config; |
16 | if ($Config{lseeksize} < 8) { |
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17 | print "1..0\n# no 64-bit file offsets\n"; |
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18 | exit(0); |
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19 | } |
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20 | } |
21 | |
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22 | sub bye { |
23 | close(BIG); |
24 | unlink "big"; |
25 | exit(0); |
26 | } |
27 | |
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28 | sub explain { |
29 | print STDERR <<EOM; |
30 | # |
31 | # If the lfs (large file support: large meaning larger than two gigabytes) |
32 | # tests fail, it may mean either that your process is not allowed to write |
33 | # large files or that the file system you are running the tests on doesn't |
34 | # support large files, or both. |
35 | # |
36 | # Perl may still be able to support large files, once you have |
37 | # such a process and such a file system. |
38 | # |
39 | EOM |
40 | } |
41 | |
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42 | # Known have-nots. |
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43 | if ($^O eq 'win32' || $^O eq 'vms') { |
44 | print "1..0\n# no sparse files\n"; |
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45 | bye(); |
46 | } |
47 | |
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48 | # Then try to deduce whether we have sparse files. |
49 | |
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50 | # Let's not depend on Fcntl or any other extension. |
51 | |
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52 | my ($SEEK_SET, $SEEK_CUR, $SEEK_END) = (0, 1, 2); |
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53 | |
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54 | # We'll start off by creating a one megabyte file which has |
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55 | # only three "true" bytes. If we have sparseness, we should |
56 | # consume less blocks than one megabyte (assuming nobody has |
57 | # one megabyte blocks...) |
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58 | |
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59 | open(BIG, ">big") or do { warn "open failed: $!\n"; bye }; |
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60 | binmode BIG; |
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61 | seek(BIG, 1_000_000, $SEEK_SET); |
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62 | print BIG "big"; |
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63 | close(BIG); |
64 | |
65 | my @s; |
66 | |
67 | @s = stat("big"); |
68 | |
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69 | print "# @s\n"; |
70 | |
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71 | my $BLOCKSIZE = 512; # is this really correct everywhere? |
72 | |
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73 | unless (@s == 13 && |
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74 | $s[7] == 1_000_003 && |
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75 | defined $s[12] && |
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76 | $BLOCKSIZE * $s[12] < 1_000_003) { |
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77 | print "1..0\n# no sparse files?\n"; |
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78 | bye(); |
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79 | } |
80 | |
81 | # By now we better be sure that we do have sparse files: |
82 | # if we are not, the following will hog 5 gigabytes of disk. Ooops. |
83 | |
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84 | open(BIG, ">big") or do { warn "open failed: $!\n"; bye }; |
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85 | binmode BIG; |
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86 | seek(BIG, 5_000_000_000, $SEEK_SET); |
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87 | # Either the print or (more likely, thanks to buffering) the close will |
88 | # fail if there are are filesize limitations (process or fs). |
89 | my $print = print BIG "big"; |
90 | my $close = close BIG if $print; |
91 | unless ($print && $close) { |
92 | $ENV{LC_ALL} = "C"; |
93 | if ($! =~/File too large/) { |
94 | print "1..0\n# writing past 2GB failed\n"; |
95 | explain(); |
96 | } |
97 | bye(); |
98 | } |
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99 | |
100 | @s = stat("big"); |
101 | |
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102 | print "# @s\n"; |
103 | |
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104 | sub fail () { |
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105 | print "not "; |
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106 | $fail++; |
107 | } |
108 | |
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109 | print "1..8\n"; |
110 | |
111 | my $fail = 0; |
112 | |
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113 | fail unless $s[7] == 5_000_000_003; # exercizes pp_stat |
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114 | print "ok 1\n"; |
115 | |
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116 | fail unless -s "big" == 5_000_000_003; # exercizes pp_ftsize |
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117 | print "ok 2\n"; |
118 | |
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119 | open(BIG, "big") or do { warn "open failed: $!\n"; bye }; |
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120 | binmode BIG; |
121 | |
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122 | seek(BIG, 4_500_000_000, $SEEK_SET); |
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123 | |
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124 | fail unless tell(BIG) == 4_500_000_000; |
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125 | print "ok 3\n"; |
126 | |
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127 | seek(BIG, 1, $SEEK_CUR); |
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128 | |
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129 | fail unless tell(BIG) == 4_500_000_001; |
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130 | print "ok 4\n"; |
131 | |
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132 | seek(BIG, -1, $SEEK_CUR); |
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133 | |
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134 | fail unless tell(BIG) == 4_500_000_000; |
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135 | print "ok 5\n"; |
136 | |
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137 | seek(BIG, -3, $SEEK_END); |
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138 | |
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139 | fail unless tell(BIG) == 5_000_000_000; |
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140 | print "ok 6\n"; |
141 | |
142 | my $big; |
143 | |
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144 | fail unless read(BIG, $big, 3) == 3; |
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145 | print "ok 7\n"; |
146 | |
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147 | fail unless $big eq "big"; |
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148 | print "ok 8\n"; |
149 | |
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150 | explain if $fail; |
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151 | |
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152 | bye(); |
153 | |
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154 | # eof |