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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 | my $O_LARGEFILE; |
43 | eval { $O_LARGEFILE = O_LARGEFILE }; |
44 | $O_LARGEFILE = 0 unless defined $O_LARGEFILE; |
45 | |
46 | sysopen(BIG, "big", O_WRONLY|O_CREAT|O_TRUNC|$O_LARGEFILE) or |
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47 | do { warn "sysopen failed: $!\n"; bye }; |
48 | sysseek(BIG, 1_000_000, SEEK_SET); |
49 | syswrite(BIG, "big"); |
50 | close(BIG); |
51 | |
52 | my @s; |
53 | |
54 | @s = stat("big"); |
55 | |
56 | print "# @s\n"; |
57 | |
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58 | my $BLOCKSIZE = 512; # is this really correct everywhere? |
59 | |
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60 | unless (@s == 13 && |
61 | $s[7] == 1_000_003 && |
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62 | defined $s[12] && |
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63 | $BLOCKSIZE * $s[12] < 1_000_003) { |
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64 | print "1..0\n# no sparse files?\n"; |
65 | bye(); |
66 | } |
67 | |
68 | # By now we better be sure that we do have sparse files: |
69 | # if we are not, the following will hog 5 gigabytes of disk. Ooops. |
70 | |
71 | print "1..8\n"; |
72 | |
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73 | my $fail = 0; |
74 | |
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75 | sysopen(BIG, "big", O_WRONLY|O_CREAT|O_TRUNC|$O_LARGEFILE) or |
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76 | do { warn "sysopen failed: $!\n"; bye }; |
77 | sysseek(BIG, 5_000_000_000, SEEK_SET); |
78 | syswrite(BIG, "big"); |
79 | close BIG; |
80 | |
81 | @s = stat("big"); |
82 | |
83 | print "# @s\n"; |
84 | |
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85 | sub fail () { |
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86 | print "not "; |
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87 | $fail++; |
88 | } |
89 | |
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90 | fail unless $s[7] == 5_000_000_003; # exercizes pp_stat |
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91 | print "ok 1\n"; |
92 | |
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93 | fail unless -s "big" == 5_000_000_003; # exercizes pp_ftsize |
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94 | print "ok 2\n"; |
95 | |
96 | sysopen(BIG, "big", O_RDONLY) or do { warn "sysopen failed: $!\n"; bye }; |
97 | |
98 | sysseek(BIG, 4_500_000_000, SEEK_SET); |
99 | |
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100 | fail unless sysseek(BIG, 0, SEEK_CUR) == 4_500_000_000; |
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101 | print "ok 3\n"; |
102 | |
103 | sysseek(BIG, 1, SEEK_CUR); |
104 | |
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105 | fail unless sysseek(BIG, 0, SEEK_CUR) == 4_500_000_001; |
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106 | print "ok 4\n"; |
107 | |
108 | sysseek(BIG, -1, SEEK_CUR); |
109 | |
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110 | fail unless sysseek(BIG, 0, SEEK_CUR) == 4_500_000_000; |
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111 | print "ok 5\n"; |
112 | |
113 | sysseek(BIG, -3, SEEK_END); |
114 | |
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115 | fail unless sysseek(BIG, 0, SEEK_CUR) == 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 sysread(BIG, $big, 3) == 3; |
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121 | print "ok 7\n"; |
122 | |
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123 | fail unless $big eq "big"; |
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124 | print "ok 8\n"; |
125 | |
126 | bye(); |
127 | |
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128 | if ($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 |