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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 | chdir 't' if -d 't'; |
7 | unshift @INC, '../lib'; |
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8 | require Config; import Config; |
9 | # Don't bother if there are no quad offsets. |
10 | if ($Config{lseeksize} < 8) { |
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11 | print "1..0\n# no 64-bit file offsets\n"; |
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12 | exit(0); |
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13 | } |
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14 | require Fcntl; import Fcntl; |
15 | } |
16 | |
17 | sub bye { |
18 | close(BIG); |
19 | unlink "big"; |
20 | exit(0); |
21 | } |
22 | |
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23 | sub explain { |
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24 | print <<EOM; |
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25 | # |
26 | # If the lfs (large file support: large meaning larger than two gigabytes) |
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27 | # tests are skipped or fail, it may mean either that your process |
28 | # (or process group) is not allowed to write large files (resource |
29 | # limits) or that the file system you are running the tests on doesn't |
30 | # let your user/group have large files (quota) or the filesystem simply |
31 | # doesn't support large files. You may even need to reconfigure your kernel. |
32 | # (This is all very operating system and site-dependent.) |
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33 | # |
34 | # Perl may still be able to support large files, once you have |
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35 | # such a process, enough quota, and such a (file) system. |
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36 | # |
37 | EOM |
38 | } |
39 | |
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40 | # Known have-nots. |
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41 | if ($^O eq 'win32' || $^O eq 'vms') { |
42 | print "1..0\n# no sparse files\n"; |
43 | bye(); |
44 | } |
45 | |
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46 | # Known haves that have problems running this test |
47 | # (for example because they do not support sparse files, like UNICOS) |
48 | if ($^O eq 'unicos') { |
49 | print "1..0\n# large files known to work but unable to test them here\n"; |
50 | bye(); |
51 | } |
52 | |
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53 | # Then try to deduce whether we have sparse files. |
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 | sysopen(BIG, "big", O_WRONLY|O_CREAT|O_TRUNC) or |
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61 | do { warn "sysopen failed: $!\n"; bye }; |
62 | sysseek(BIG, 1_000_000, SEEK_SET); |
63 | syswrite(BIG, "big"); |
64 | close(BIG); |
65 | |
66 | my @s; |
67 | |
68 | @s = stat("big"); |
69 | |
70 | print "# @s\n"; |
71 | |
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72 | my $BLOCKSIZE = $s[11] || 512; |
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73 | |
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74 | unless (@s == 13 && |
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"; |
79 | bye(); |
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 | $ENV{LC_ALL} = "C"; |
86 | |
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87 | sysopen(BIG, "big", O_WRONLY|O_CREAT|O_TRUNC) or |
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88 | do { warn "sysopen failed: $!\n"; bye }; |
89 | sysseek(BIG, 5_000_000_000, SEEK_SET); |
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90 | |
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91 | # The syswrite will fail if there are are filesize limitations (process or fs). |
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92 | my $syswrite = syswrite(BIG, "big") == 3; |
93 | my $close = close BIG if $syswrite; |
94 | unless($syswrite && $close) { |
95 | unless ($syswrite) { |
96 | print "# syswrite failed: $!\n" |
97 | } else { |
98 | print "# close failed: $!\n" |
99 | } |
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100 | if ($! =~/too large/i) { |
101 | print "1..0\n# writing past 2GB failed: process limits?\n"; |
102 | } elsif ($! =~ /quota/i) { |
103 | print "1..0\n# filesystem quota limits?\n"; |
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104 | } |
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105 | explain(); |
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106 | bye(); |
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107 | } |
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108 | |
109 | @s = stat("big"); |
110 | |
111 | print "# @s\n"; |
112 | |
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113 | unless ($s[7] == 5_000_000_003) { |
114 | print "1..0\n# not configured to use large files?\n"; |
115 | explain(); |
116 | bye(); |
117 | } |
118 | |
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119 | sub fail () { |
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120 | print "not "; |
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121 | $fail++; |
122 | } |
123 | |
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124 | print "1..17\n"; |
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125 | |
126 | my $fail = 0; |
127 | |
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128 | fail unless $s[7] == 5_000_000_003; # exercizes pp_stat |
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129 | print "ok 1\n"; |
130 | |
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131 | fail unless -s "big" == 5_000_000_003; # exercizes pp_ftsize |
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132 | print "ok 2\n"; |
133 | |
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134 | fail unless -e "big"; |
135 | print "ok 3\n"; |
136 | |
137 | fail unless -f "big"; |
138 | print "ok 4\n"; |
139 | |
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140 | sysopen(BIG, "big", O_RDONLY) or do { warn "sysopen failed: $!\n"; bye }; |
141 | |
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142 | fail unless sysseek(BIG, 4_500_000_000, SEEK_SET) == 4_500_000_000; |
143 | print "ok 5\n"; |
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144 | |
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145 | fail unless sysseek(BIG, 0, SEEK_CUR) == 4_500_000_000; |
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146 | print "ok 6\n"; |
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147 | |
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148 | fail unless sysseek(BIG, 1, SEEK_CUR) == 4_500_000_001; |
149 | print "ok 7\n"; |
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150 | |
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151 | fail unless sysseek(BIG, 0, SEEK_CUR) == 4_500_000_001; |
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152 | print "ok 8\n"; |
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153 | |
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154 | fail unless sysseek(BIG, -1, SEEK_CUR) == 4_500_000_000; |
155 | print "ok 9\n"; |
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156 | |
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157 | fail unless sysseek(BIG, 0, SEEK_CUR) == 4_500_000_000; |
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158 | print "ok 10\n"; |
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159 | |
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160 | fail unless sysseek(BIG, -3, SEEK_END) == 5_000_000_000; |
161 | print "ok 11\n"; |
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162 | |
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163 | fail unless sysseek(BIG, 0, SEEK_CUR) == 5_000_000_000; |
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164 | print "ok 12\n"; |
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165 | |
166 | my $big; |
167 | |
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168 | fail unless sysread(BIG, $big, 3) == 3; |
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169 | print "ok 13\n"; |
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170 | |
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171 | fail unless $big eq "big"; |
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172 | print "ok 14\n"; |
173 | |
174 | # 705_032_704 = (I32)5_000_000_000 |
175 | fail unless seek(BIG, 705_032_704, $SEEK_SET); |
176 | print "ok 15\n"; |
177 | |
178 | my $zero; |
179 | |
180 | fail unless read(BIG, $zero, 3) == 3; |
181 | print "ok 16\n"; |
182 | |
183 | fail unless $zero eq "\0\0\0"; |
184 | print "ok 17\n"; |
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185 | |
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186 | explain if $fail; |
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187 | |
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188 | bye(); # does the necessary cleanup |
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189 | |
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190 | END { |
191 | unlink "big"; # be paranoid about leaving 5 gig files lying around |
192 | } |
193 | |
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194 | # eof |