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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 ($Config{lseeksize} < 8) { |
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17 | print "1..0\n# no 64-bit file offsets\n"; |
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18 | exit(0); |
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19 | } |
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20 | require Fcntl; import Fcntl; |
21 | } |
22 | |
23 | sub bye { |
24 | close(BIG); |
25 | unlink "big"; |
26 | exit(0); |
27 | } |
28 | |
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29 | sub explain { |
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30 | print <<EOM; |
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31 | # |
32 | # If the lfs (large file support: large meaning larger than two gigabytes) |
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33 | # tests are skipped or fail, it may mean either that your process |
34 | # (or process group) is not allowed to write large files (resource |
35 | # limits) or that the file system you are running the tests on doesn't |
36 | # let your user/group have large files (quota) or the filesystem simply |
37 | # doesn't support large files. You may even need to reconfigure your kernel. |
38 | # (This is all very operating system and site-dependent.) |
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39 | # |
40 | # Perl may still be able to support large files, once you have |
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41 | # such a process, enough quota, and such a (file) system. |
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42 | # |
43 | EOM |
44 | } |
45 | |
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46 | # Known have-nots. |
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47 | if ($^O eq 'win32' || $^O eq 'vms') { |
48 | print "1..0\n# no sparse files\n"; |
49 | bye(); |
50 | } |
51 | |
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52 | # Known haves that have problems running this test |
53 | # (for example because they do not support sparse files, like UNICOS) |
54 | if ($^O eq 'unicos') { |
55 | print "1..0\n# large files known to work but unable to test them here\n"; |
56 | bye(); |
57 | } |
58 | |
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59 | # Then try to deduce whether we have sparse files. |
60 | |
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61 | # We'll start off by creating a one megabyte file which has |
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62 | # only three "true" bytes. If we have sparseness, we should |
63 | # consume less blocks than one megabyte (assuming nobody has |
64 | # one megabyte blocks...) |
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65 | |
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66 | sysopen(BIG, "big", O_WRONLY|O_CREAT|O_TRUNC) or |
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67 | do { warn "sysopen failed: $!\n"; bye }; |
68 | sysseek(BIG, 1_000_000, SEEK_SET); |
69 | syswrite(BIG, "big"); |
70 | close(BIG); |
71 | |
72 | my @s; |
73 | |
74 | @s = stat("big"); |
75 | |
76 | print "# @s\n"; |
77 | |
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78 | my $BLOCKSIZE = $s[11] || 512; |
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79 | |
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80 | unless (@s == 13 && |
81 | $s[7] == 1_000_003 && |
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82 | defined $s[12] && |
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83 | $BLOCKSIZE * $s[12] < 1_000_003) { |
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84 | print "1..0\n# no sparse files?\n"; |
85 | bye(); |
86 | } |
87 | |
88 | # By now we better be sure that we do have sparse files: |
89 | # if we are not, the following will hog 5 gigabytes of disk. Ooops. |
90 | |
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91 | $ENV{LC_ALL} = "C"; |
92 | |
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93 | sysopen(BIG, "big", O_WRONLY|O_CREAT|O_TRUNC) or |
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94 | do { warn "sysopen failed: $!\n"; bye }; |
95 | sysseek(BIG, 5_000_000_000, SEEK_SET); |
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96 | |
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97 | # The syswrite will fail if there are are filesize limitations (process or fs). |
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98 | my $syswrite = syswrite(BIG, "big") == 3; |
99 | my $close = close BIG if $syswrite; |
100 | unless($syswrite && $close) { |
101 | unless ($syswrite) { |
102 | print "# syswrite failed: $!\n" |
103 | } else { |
104 | print "# close failed: $!\n" |
105 | } |
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106 | if ($! =~/too large/i) { |
107 | print "1..0\n# writing past 2GB failed: process limits?\n"; |
108 | } elsif ($! =~ /quota/i) { |
109 | print "1..0\n# filesystem quota limits?\n"; |
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110 | } |
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111 | explain(); |
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112 | bye(); |
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113 | } |
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114 | |
115 | @s = stat("big"); |
116 | |
117 | print "# @s\n"; |
118 | |
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119 | unless ($s[7] == 5_000_000_003) { |
120 | print "1..0\n# not configured to use large files?\n"; |
121 | explain(); |
122 | bye(); |
123 | } |
124 | |
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125 | sub fail () { |
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126 | print "not "; |
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127 | $fail++; |
128 | } |
129 | |
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130 | print "1..17\n"; |
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131 | |
132 | my $fail = 0; |
133 | |
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134 | fail unless $s[7] == 5_000_000_003; # exercizes pp_stat |
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135 | print "ok 1\n"; |
136 | |
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137 | fail unless -s "big" == 5_000_000_003; # exercizes pp_ftsize |
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138 | print "ok 2\n"; |
139 | |
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140 | fail unless -e "big"; |
141 | print "ok 3\n"; |
142 | |
143 | fail unless -f "big"; |
144 | print "ok 4\n"; |
145 | |
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146 | sysopen(BIG, "big", O_RDONLY) or do { warn "sysopen failed: $!\n"; bye }; |
147 | |
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148 | fail unless sysseek(BIG, 4_500_000_000, SEEK_SET) == 4_500_000_000; |
149 | print "ok 5\n"; |
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150 | |
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151 | fail unless sysseek(BIG, 0, SEEK_CUR) == 4_500_000_000; |
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152 | print "ok 6\n"; |
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153 | |
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154 | fail unless sysseek(BIG, 1, SEEK_CUR) == 4_500_000_001; |
155 | print "ok 7\n"; |
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156 | |
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157 | fail unless sysseek(BIG, 0, SEEK_CUR) == 4_500_000_001; |
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158 | print "ok 8\n"; |
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159 | |
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160 | fail unless sysseek(BIG, -1, SEEK_CUR) == 4_500_000_000; |
161 | print "ok 9\n"; |
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162 | |
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163 | fail unless sysseek(BIG, 0, SEEK_CUR) == 4_500_000_000; |
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164 | print "ok 10\n"; |
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165 | |
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166 | fail unless sysseek(BIG, -3, SEEK_END) == 5_000_000_000; |
167 | print "ok 11\n"; |
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168 | |
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169 | fail unless sysseek(BIG, 0, SEEK_CUR) == 5_000_000_000; |
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170 | print "ok 12\n"; |
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171 | |
172 | my $big; |
173 | |
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174 | fail unless sysread(BIG, $big, 3) == 3; |
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175 | print "ok 13\n"; |
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176 | |
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177 | fail unless $big eq "big"; |
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178 | print "ok 14\n"; |
179 | |
180 | # 705_032_704 = (I32)5_000_000_000 |
181 | fail unless seek(BIG, 705_032_704, $SEEK_SET); |
182 | print "ok 15\n"; |
183 | |
184 | my $zero; |
185 | |
186 | fail unless read(BIG, $zero, 3) == 3; |
187 | print "ok 16\n"; |
188 | |
189 | fail unless $zero eq "\0\0\0"; |
190 | print "ok 17\n"; |
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191 | |
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192 | explain if $fail; |
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193 | |
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194 | bye(); # does the necessary cleanup |
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195 | |
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196 | END { |
197 | unlink "big"; # be paranoid about leaving 5 gig files lying around |
198 | } |
199 | |
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200 | # eof |