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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 ($Config{lseeksize} < 8) { |
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17 | print "1..0\n# no 64-bit file offsets\n"; |
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18 | exit(0); |
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19 | } |
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20 | } |
21 | |
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22 | sub bye { |
23 | close(BIG); |
24 | unlink "big"; |
25 | exit(0); |
26 | } |
27 | |
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28 | sub explain { |
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29 | print <<EOM; |
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30 | # |
31 | # If the lfs (large file support: large meaning larger than two gigabytes) |
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32 | # tests are skipped or fail, it may mean either that your process is not |
33 | # allowed to write large files or that the file system you are running |
34 | # the tests on doesn't support large files, or both. You may also need |
35 | # to reconfigure your kernel. (This is all very system-dependent.) |
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36 | # |
37 | # Perl may still be able to support large files, once you have |
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38 | # such a process and such a (file) system. |
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39 | # |
40 | EOM |
41 | } |
42 | |
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43 | # Known have-nots. |
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44 | if ($^O eq 'win32' || $^O eq 'vms') { |
45 | print "1..0\n# no sparse files\n"; |
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46 | bye(); |
47 | } |
48 | |
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49 | # Then try to deduce whether we have sparse files. |
50 | |
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51 | # Let's not depend on Fcntl or any other extension. |
52 | |
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53 | my ($SEEK_SET, $SEEK_CUR, $SEEK_END) = (0, 1, 2); |
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54 | |
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55 | # We'll start off by creating a one megabyte file which has |
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56 | # only three "true" bytes. If we have sparseness, we should |
57 | # consume less blocks than one megabyte (assuming nobody has |
58 | # one megabyte blocks...) |
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59 | |
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60 | open(BIG, ">big") or do { warn "open failed: $!\n"; bye }; |
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61 | binmode BIG; |
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62 | seek(BIG, 1_000_000, $SEEK_SET); |
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63 | print BIG "big"; |
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64 | close(BIG); |
65 | |
66 | my @s; |
67 | |
68 | @s = stat("big"); |
69 | |
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70 | print "# @s\n"; |
71 | |
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72 | my $BLOCKSIZE = 512; # is this really correct everywhere? |
73 | |
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74 | unless (@s == 13 && |
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75 | $s[7] == 1_000_003 && |
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76 | defined $s[12] && |
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77 | $BLOCKSIZE * $s[12] < 1_000_003) { |
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78 | print "1..0\n# no sparse files?\n"; |
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79 | bye(); |
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80 | } |
81 | |
82 | # By now we better be sure that we do have sparse files: |
83 | # if we are not, the following will hog 5 gigabytes of disk. Ooops. |
84 | |
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85 | open(BIG, ">big") or do { warn "open failed: $!\n"; bye }; |
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86 | binmode BIG; |
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87 | seek(BIG, 5_000_000_000, $SEEK_SET); |
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88 | # Either the print or (more likely, thanks to buffering) the close will |
89 | # fail if there are are filesize limitations (process or fs). |
90 | my $print = print BIG "big"; |
91 | my $close = close BIG if $print; |
92 | unless ($print && $close) { |
93 | $ENV{LC_ALL} = "C"; |
94 | if ($! =~/File too large/) { |
95 | print "1..0\n# writing past 2GB failed\n"; |
96 | explain(); |
97 | } |
98 | bye(); |
99 | } |
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100 | |
101 | @s = stat("big"); |
102 | |
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103 | print "# @s\n"; |
104 | |
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105 | sub fail () { |
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106 | print "not "; |
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107 | $fail++; |
108 | } |
109 | |
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110 | print "1..17\n"; |
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111 | |
112 | my $fail = 0; |
113 | |
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114 | fail unless $s[7] == 5_000_000_003; # exercizes pp_stat |
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115 | print "ok 1\n"; |
116 | |
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117 | fail unless -s "big" == 5_000_000_003; # exercizes pp_ftsize |
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118 | print "ok 2\n"; |
119 | |
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120 | fail unless -e "big"; |
121 | print "ok 3\n"; |
122 | |
123 | fail unless -f "big"; |
124 | print "ok 4\n"; |
125 | |
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126 | open(BIG, "big") or do { warn "open failed: $!\n"; bye }; |
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127 | binmode BIG; |
128 | |
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129 | fail unless seek(BIG, 4_500_000_000, $SEEK_SET); |
130 | print "ok 5\n"; |
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131 | |
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132 | fail unless tell(BIG) == 4_500_000_000; |
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133 | print "ok 6\n"; |
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134 | |
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135 | fail unless seek(BIG, 1, $SEEK_CUR); |
136 | print "ok 7\n"; |
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137 | |
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138 | fail unless tell(BIG) == 4_500_000_001; |
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139 | print "ok 8\n"; |
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140 | |
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141 | fail unless seek(BIG, -1, $SEEK_CUR); |
142 | print "ok 9\n"; |
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143 | |
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144 | fail unless tell(BIG) == 4_500_000_000; |
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145 | print "ok 10\n"; |
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146 | |
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147 | fail unless seek(BIG, -3, $SEEK_END); |
148 | print "ok 11\n"; |
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149 | |
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150 | fail unless tell(BIG) == 5_000_000_000; |
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151 | print "ok 12\n"; |
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152 | |
153 | my $big; |
154 | |
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155 | fail unless read(BIG, $big, 3) == 3; |
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156 | print "ok 13\n"; |
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157 | |
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158 | fail unless $big eq "big"; |
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159 | print "ok 14\n"; |
160 | |
161 | # 705_032_704 = (I32)5_000_000_000 |
162 | fail unless seek(BIG, 705_032_704, $SEEK_SET); |
163 | print "ok 15\n"; |
164 | |
165 | my $zero; |
166 | |
167 | fail unless read(BIG, $zero, 3) == 3; |
168 | print "ok 16\n"; |
169 | |
170 | fail unless $zero eq "\0\0\0"; |
171 | print "ok 17\n"; |
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172 | |
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173 | explain if $fail; |
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174 | |
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175 | bye(); # does the necessary cleanup |
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176 | |
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177 | # eof |