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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 ($Config{lseeksize} < 8) { |
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17 | print "1..0\n# no 64-bit file offsets\n"; |
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18 | exit(0); |
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19 | } |
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20 | } |
21 | |
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22 | sub bye { |
23 | close(BIG); |
24 | unlink "big"; |
25 | exit(0); |
26 | } |
27 | |
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28 | # Known have-nots. |
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29 | if ($^O eq 'win32' || $^O eq 'vms') { |
30 | print "1..0\n# no sparse files\n"; |
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31 | bye(); |
32 | } |
33 | |
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34 | # Then try to deduce whether we have sparse files. |
35 | |
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36 | # Let's not depend on Fcntl or any other extension. |
37 | |
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38 | my ($SEEK_SET, $SEEK_CUR, $SEEK_END) = (0, 1, 2); |
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39 | |
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40 | # We'll start off by creating a one megabyte file which has |
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41 | # only three "true" bytes. If we have sparseness, we should |
42 | # consume less blocks than one megabyte (assuming nobody has |
43 | # one megabyte blocks...) |
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44 | |
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45 | open(BIG, ">big") or do { warn "open failed: $!\n"; bye }; |
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46 | binmode BIG; |
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47 | seek(BIG, 1_000_000, $SEEK_SET); |
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48 | print BIG "big"; |
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49 | close(BIG); |
50 | |
51 | my @s; |
52 | |
53 | @s = stat("big"); |
54 | |
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55 | print "# @s\n"; |
56 | |
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57 | my $BLOCKSIZE = 512; # is this really correct everywhere? |
58 | |
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59 | unless (@s == 13 && |
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60 | $s[7] == 1_000_003 && |
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61 | defined $s[12] && |
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62 | $BLOCKSIZE * $s[12] < 1_000_003) { |
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63 | print "1..0\n# no sparse files?\n"; |
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64 | bye(); |
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65 | } |
66 | |
67 | # By now we better be sure that we do have sparse files: |
68 | # if we are not, the following will hog 5 gigabytes of disk. Ooops. |
69 | |
70 | print "1..8\n"; |
71 | |
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72 | my $fail = 0; |
73 | |
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74 | open(BIG, ">big") or do { warn "open failed: $!\n"; bye }; |
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75 | binmode BIG; |
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76 | seek(BIG, 5_000_000_000, $SEEK_SET); |
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77 | print BIG "big"; |
78 | close BIG; |
79 | |
80 | @s = stat("big"); |
81 | |
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82 | print "# @s\n"; |
83 | |
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84 | sub fail () { |
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85 | print "not "; |
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86 | $fail++; |
87 | } |
88 | |
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89 | fail unless $s[7] == 5_000_000_003; # exercizes pp_stat |
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90 | print "ok 1\n"; |
91 | |
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92 | fail unless -s "big" == 5_000_000_003; # exercizes pp_ftsize |
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93 | print "ok 2\n"; |
94 | |
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95 | open(BIG, "big") or do { warn "open failed: $!\n"; bye }; |
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96 | binmode BIG; |
97 | |
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98 | seek(BIG, 4_500_000_000, $SEEK_SET); |
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99 | |
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100 | fail unless tell(BIG) == 4_500_000_000; |
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101 | print "ok 3\n"; |
102 | |
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103 | seek(BIG, 1, $SEEK_CUR); |
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104 | |
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105 | fail unless tell(BIG) == 4_500_000_001; |
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106 | print "ok 4\n"; |
107 | |
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108 | seek(BIG, -1, $SEEK_CUR); |
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109 | |
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110 | fail unless tell(BIG) == 4_500_000_000; |
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111 | print "ok 5\n"; |
112 | |
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113 | seek(BIG, -3, $SEEK_END); |
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114 | |
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115 | fail unless tell(BIG) == 5_000_000_000; |
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116 | print "ok 6\n"; |
117 | |
118 | my $big; |
119 | |
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120 | fail unless read(BIG, $big, 3) == 3; |
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121 | print "ok 7\n"; |
122 | |
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123 | fail unless $big eq "big"; |
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124 | print "ok 8\n"; |
125 | |
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126 | bye(); |
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127 | |
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128 | if ($fail) { |
129 | print STDERR <<EOM; |
130 | # |
131 | # If the lfs (large file support) tests fail, it means that |
132 | # the *file system* you are running the tests on doesn't support |
133 | # large files (files larger than two gigabytes). Perl may still |
134 | # be able to support such files, once you have such a file system. |
135 | # |
136 | EOM |
137 | } |
138 | |
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139 | # eof |