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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 | # Then try to deduce whether we have sparse files. |
53 | |
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54 | # We'll start off by creating a one megabyte file which has |
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55 | # only three "true" bytes. If we have sparseness, we should |
56 | # consume less blocks than one megabyte (assuming nobody has |
57 | # one megabyte blocks...) |
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58 | |
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59 | sysopen(BIG, "big", O_WRONLY|O_CREAT|O_TRUNC) or |
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60 | do { warn "sysopen failed: $!\n"; bye }; |
61 | sysseek(BIG, 1_000_000, SEEK_SET); |
62 | syswrite(BIG, "big"); |
63 | close(BIG); |
64 | |
65 | my @s; |
66 | |
67 | @s = stat("big"); |
68 | |
69 | print "# @s\n"; |
70 | |
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71 | # Is there a portable way to find out what's the unit of st_blocks? |
72 | |
73 | my $BLOCKSIZE = 512; |
74 | |
75 | $BLOCKSIZE = 4096 if $^O eq 'unicos'; |
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76 | |
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77 | unless (@s == 13 && |
78 | $s[7] == 1_000_003 && |
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79 | defined $s[12] && |
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80 | $BLOCKSIZE * $s[12] < 1_000_003) { |
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81 | print "1..0\n# no sparse files?\n"; |
82 | bye(); |
83 | } |
84 | |
85 | # By now we better be sure that we do have sparse files: |
86 | # if we are not, the following will hog 5 gigabytes of disk. Ooops. |
87 | |
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88 | $ENV{LC_ALL} = "C"; |
89 | |
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90 | sysopen(BIG, "big", O_WRONLY|O_CREAT|O_TRUNC) or |
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91 | do { warn "sysopen failed: $!\n"; bye }; |
92 | sysseek(BIG, 5_000_000_000, SEEK_SET); |
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93 | |
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94 | # The syswrite will fail if there are are filesize limitations (process or fs). |
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95 | my $syswrite = syswrite(BIG, "big") == 3; |
96 | my $close = close BIG if $syswrite; |
97 | unless($syswrite && $close) { |
98 | unless ($syswrite) { |
99 | print "# syswrite failed: $!\n" |
100 | } else { |
101 | print "# close failed: $!\n" |
102 | } |
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103 | if ($! =~/too large/i) { |
104 | print "1..0\n# writing past 2GB failed: process limits?\n"; |
105 | } elsif ($! =~ /quota/i) { |
106 | print "1..0\n# filesystem quota limits?\n"; |
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107 | } |
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108 | explain(); |
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109 | bye(); |
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110 | } |
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111 | |
112 | @s = stat("big"); |
113 | |
114 | print "# @s\n"; |
115 | |
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116 | sub fail () { |
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117 | print "not "; |
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118 | $fail++; |
119 | } |
120 | |
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121 | print "1..17\n"; |
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122 | |
123 | my $fail = 0; |
124 | |
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125 | fail unless $s[7] == 5_000_000_003; # exercizes pp_stat |
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126 | print "ok 1\n"; |
127 | |
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128 | fail unless -s "big" == 5_000_000_003; # exercizes pp_ftsize |
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129 | print "ok 2\n"; |
130 | |
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131 | fail unless -e "big"; |
132 | print "ok 3\n"; |
133 | |
134 | fail unless -f "big"; |
135 | print "ok 4\n"; |
136 | |
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137 | sysopen(BIG, "big", O_RDONLY) or do { warn "sysopen failed: $!\n"; bye }; |
138 | |
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139 | fail unless sysseek(BIG, 4_500_000_000, SEEK_SET) == 4_500_000_000; |
140 | print "ok 5\n"; |
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141 | |
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142 | fail unless sysseek(BIG, 0, SEEK_CUR) == 4_500_000_000; |
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143 | print "ok 6\n"; |
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144 | |
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145 | fail unless sysseek(BIG, 1, SEEK_CUR) == 4_500_000_001; |
146 | print "ok 7\n"; |
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147 | |
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148 | fail unless sysseek(BIG, 0, SEEK_CUR) == 4_500_000_001; |
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149 | print "ok 8\n"; |
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150 | |
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151 | fail unless sysseek(BIG, -1, SEEK_CUR) == 4_500_000_000; |
152 | print "ok 9\n"; |
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153 | |
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154 | fail unless sysseek(BIG, 0, SEEK_CUR) == 4_500_000_000; |
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155 | print "ok 10\n"; |
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156 | |
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157 | fail unless sysseek(BIG, -3, SEEK_END) == 5_000_000_000; |
158 | print "ok 11\n"; |
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159 | |
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160 | fail unless sysseek(BIG, 0, SEEK_CUR) == 5_000_000_000; |
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161 | print "ok 12\n"; |
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162 | |
163 | my $big; |
164 | |
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165 | fail unless sysread(BIG, $big, 3) == 3; |
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166 | print "ok 13\n"; |
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167 | |
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168 | fail unless $big eq "big"; |
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169 | print "ok 14\n"; |
170 | |
171 | # 705_032_704 = (I32)5_000_000_000 |
172 | fail unless seek(BIG, 705_032_704, $SEEK_SET); |
173 | print "ok 15\n"; |
174 | |
175 | my $zero; |
176 | |
177 | fail unless read(BIG, $zero, 3) == 3; |
178 | print "ok 16\n"; |
179 | |
180 | fail unless $zero eq "\0\0\0"; |
181 | print "ok 17\n"; |
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182 | |
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183 | explain if $fail; |
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184 | |
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185 | bye(); # does the necessary cleanup |
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186 | |
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187 | # eof |