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