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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 ($Config{lseeksize} < 8) { |
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17 | print "1..0\n# no 64-bit file offsets\n"; |
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18 | exit(0); |
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19 | } |
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20 | require Fcntl; import Fcntl; |
21 | } |
22 | |
23 | sub bye { |
24 | close(BIG); |
25 | unlink "big"; |
26 | exit(0); |
27 | } |
28 | |
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29 | sub explain { |
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30 | print <<EOM; |
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31 | # |
32 | # If the lfs (large file support: large meaning larger than two gigabytes) |
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33 | # tests are skipped or fail, it may mean either that your process is not |
34 | # allowed to write large files or that the file system you are running |
35 | # the tests on doesn't support large files, or both. You may also need |
36 | # to reconfigure your kernel. (This is all very system-dependent.) |
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37 | # |
38 | # Perl may still be able to support large files, once you have |
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39 | # such a process and such a (file) system. |
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40 | # |
41 | EOM |
42 | } |
43 | |
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44 | # Known have-nots. |
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45 | if ($^O eq 'win32' || $^O eq 'vms') { |
46 | print "1..0\n# no sparse files\n"; |
47 | bye(); |
48 | } |
49 | |
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50 | # Then try to deduce whether we have sparse files. |
51 | |
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52 | # We'll start off by creating a one megabyte file which has |
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53 | # only three "true" bytes. If we have sparseness, we should |
54 | # consume less blocks than one megabyte (assuming nobody has |
55 | # one megabyte blocks...) |
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56 | |
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57 | sysopen(BIG, "big", O_WRONLY|O_CREAT|O_TRUNC) or |
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58 | do { warn "sysopen failed: $!\n"; bye }; |
59 | sysseek(BIG, 1_000_000, SEEK_SET); |
60 | syswrite(BIG, "big"); |
61 | close(BIG); |
62 | |
63 | my @s; |
64 | |
65 | @s = stat("big"); |
66 | |
67 | print "# @s\n"; |
68 | |
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69 | my $BLOCKSIZE = 512; # is this really correct everywhere? |
70 | |
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71 | unless (@s == 13 && |
72 | $s[7] == 1_000_003 && |
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73 | defined $s[12] && |
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74 | $BLOCKSIZE * $s[12] < 1_000_003) { |
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75 | print "1..0\n# no sparse files?\n"; |
76 | bye(); |
77 | } |
78 | |
79 | # By now we better be sure that we do have sparse files: |
80 | # if we are not, the following will hog 5 gigabytes of disk. Ooops. |
81 | |
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82 | sysopen(BIG, "big", O_WRONLY|O_CREAT|O_TRUNC) or |
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83 | do { warn "sysopen failed: $!\n"; bye }; |
84 | sysseek(BIG, 5_000_000_000, SEEK_SET); |
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85 | # The syswrite will fail if there are are filesize limitations (process or fs). |
86 | unless(syswrite(BIG, "big") == 3) { |
87 | $ENV{LC_ALL} = "C"; |
88 | if ($! =~/File too large/) { |
89 | print "1..0\n# writing past 2GB failed\n"; |
90 | explain(); |
91 | bye(); |
92 | } |
93 | } |
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94 | close BIG; |
95 | |
96 | @s = stat("big"); |
97 | |
98 | print "# @s\n"; |
99 | |
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100 | sub fail () { |
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101 | print "not "; |
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102 | $fail++; |
103 | } |
104 | |
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105 | print "1..17\n"; |
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106 | |
107 | my $fail = 0; |
108 | |
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109 | fail unless $s[7] == 5_000_000_003; # exercizes pp_stat |
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110 | print "ok 1\n"; |
111 | |
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112 | fail unless -s "big" == 5_000_000_003; # exercizes pp_ftsize |
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113 | print "ok 2\n"; |
114 | |
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115 | fail unless -e "big"; |
116 | print "ok 3\n"; |
117 | |
118 | fail unless -f "big"; |
119 | print "ok 4\n"; |
120 | |
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121 | sysopen(BIG, "big", O_RDONLY) or do { warn "sysopen failed: $!\n"; bye }; |
122 | |
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123 | fail unless sysseek(BIG, 4_500_000_000, SEEK_SET) == 4_500_000_000; |
124 | print "ok 5\n"; |
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125 | |
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126 | fail unless sysseek(BIG, 0, SEEK_CUR) == 4_500_000_000; |
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127 | print "ok 6\n"; |
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128 | |
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129 | fail unless sysseek(BIG, 1, SEEK_CUR) == 4_500_000_001; |
130 | print "ok 7\n"; |
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131 | |
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132 | fail unless sysseek(BIG, 0, SEEK_CUR) == 4_500_000_001; |
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133 | print "ok 8\n"; |
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134 | |
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135 | fail unless sysseek(BIG, -1, SEEK_CUR) == 4_500_000_000; |
136 | print "ok 9\n"; |
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137 | |
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138 | fail unless sysseek(BIG, 0, SEEK_CUR) == 4_500_000_000; |
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139 | print "ok 10\n"; |
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140 | |
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141 | fail unless sysseek(BIG, -3, SEEK_END) == 5_000_000_000; |
142 | print "ok 11\n"; |
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143 | |
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144 | fail unless sysseek(BIG, 0, SEEK_CUR) == 5_000_000_000; |
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145 | print "ok 12\n"; |
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146 | |
147 | my $big; |
148 | |
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149 | fail unless sysread(BIG, $big, 3) == 3; |
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150 | print "ok 13\n"; |
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151 | |
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152 | fail unless $big eq "big"; |
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153 | print "ok 14\n"; |
154 | |
155 | # 705_032_704 = (I32)5_000_000_000 |
156 | fail unless seek(BIG, 705_032_704, $SEEK_SET); |
157 | print "ok 15\n"; |
158 | |
159 | my $zero; |
160 | |
161 | fail unless read(BIG, $zero, 3) == 3; |
162 | print "ok 16\n"; |
163 | |
164 | fail unless $zero eq "\0\0\0"; |
165 | print "ok 17\n"; |
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166 | |
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167 | explain if $fail; |
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168 | |
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169 | bye(); # does the necessary cleanup |
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170 | |
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171 | # eof |