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1 | # NOTE: this file tests how large files (>2GB) work with raw system IO. |
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2 | # stdio: open(), tell(), seek(), print(), read() is tested in t/op/lfs.t. |
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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'; |
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7 | @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 # Skip: 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 qw(/^O_/ /^SEEK_/); |
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15 | } |
16 | |
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17 | sub zap { |
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18 | close(BIG); |
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19 | unlink("big"); |
20 | unlink("big1"); |
21 | unlink("big2"); |
22 | } |
23 | |
24 | sub bye { |
25 | zap(); |
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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 | print "# checking whether we have sparse files...\n"; |
47 | |
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48 | # Known have-nots. |
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49 | if ($^O eq 'MSWin32' || $^O eq 'VMS') { |
50 | print "1..0 # Skip: no sparse files in $^O\n"; |
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51 | bye(); |
52 | } |
53 | |
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54 | # Known haves that have problems running this test |
55 | # (for example because they do not support sparse files, like UNICOS) |
56 | if ($^O eq 'unicos') { |
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57 | print "1..0 # Skip: no sparse files in $^0, unable to test large files\n"; |
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58 | bye(); |
59 | } |
60 | |
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61 | # Then try heuristically to deduce whether we have sparse files. |
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62 | |
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63 | # We'll start off by creating a one megabyte file which has |
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64 | # only three "true" bytes. If we have sparseness, we should |
65 | # consume less blocks than one megabyte (assuming nobody has |
66 | # one megabyte blocks...) |
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67 | |
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68 | sysopen(BIG, "big1", O_WRONLY|O_CREAT|O_TRUNC) or |
69 | do { warn "sysopen big1 failed: $!\n"; bye }; |
70 | sysseek(BIG, 1_000_000, SEEK_SET) or |
71 | do { warn "sysseek big1 failed: $!\n"; bye }; |
72 | syswrite(BIG, "big") or |
73 | do { warn "syswrite big1 failed; $!\n"; bye }; |
74 | close(BIG) or |
75 | do { warn "close big1 failed: $!\n"; bye }; |
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76 | |
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77 | my @s1 = stat("big1"); |
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78 | |
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79 | print "# s1 = @s1\n"; |
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80 | |
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81 | sysopen(BIG, "big2", O_WRONLY|O_CREAT|O_TRUNC) or |
82 | do { warn "sysopen big2 failed: $!\n"; bye }; |
83 | sysseek(BIG, 2_000_000, SEEK_SET) or |
84 | do { warn "sysseek big2 failed: $!\n"; bye }; |
85 | syswrite(BIG, "big") or |
86 | do { warn "syswrite big2 failed; $!\n"; bye }; |
87 | close(BIG) or |
88 | do { warn "close big2 failed: $!\n"; bye }; |
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89 | |
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90 | my @s2 = stat("big2"); |
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91 | |
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92 | print "# s2 = @s2\n"; |
93 | |
94 | zap(); |
95 | |
96 | unless ($s1[7] == 1_000_003 && $s2[7] == 2_000_003 && |
97 | $s1[11] == $s2[11] && $s1[12] == $s2[12]) { |
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98 | print "1..0 # Skip: no sparse files?\n"; |
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99 | bye; |
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100 | } |
101 | |
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102 | print "# we seem to have sparse files...\n"; |
103 | |
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104 | # By now we better be sure that we do have sparse files: |
105 | # if we are not, the following will hog 5 gigabytes of disk. Ooops. |
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106 | # This may fail by producing some signal; run in a subprocess first for safety |
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107 | |
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108 | $ENV{LC_ALL} = "C"; |
109 | |
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110 | my $r = system '../perl', '-I../lib', '-e', <<'EOF'; |
111 | use Fcntl qw(/^O_/ /^SEEK_/); |
112 | sysopen(BIG, "big", O_WRONLY|O_CREAT|O_TRUNC) or die $!; |
113 | my $sysseek = sysseek(BIG, 5_000_000_000, SEEK_SET); |
114 | my $syswrite = syswrite(BIG, "big"); |
115 | exit 0; |
116 | EOF |
117 | |
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118 | sysopen(BIG, "big", O_WRONLY|O_CREAT|O_TRUNC) or |
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119 | do { warn "sysopen 'big' failed: $!\n"; bye }; |
120 | my $sysseek = sysseek(BIG, 5_000_000_000, SEEK_SET); |
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121 | unless (! $r && defined $sysseek && $sysseek == 5_000_000_000) { |
122 | $sysseek = 'undef' unless defined $sysseek; |
123 | print "1..0 # Skip: seeking past 2GB failed: ", |
124 | $r ? 'signal '.($r & 0x7f) : "$! (sysseek returned $sysseek)", "\n"; |
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125 | explain(); |
126 | bye(); |
127 | } |
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128 | |
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129 | # The syswrite will fail if there are are filesize limitations (process or fs). |
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130 | my $syswrite = syswrite(BIG, "big"); |
131 | print "# syswrite failed: $! (syswrite returned ", |
132 | defined $syswrite ? $syswrite : 'undef', ")\n" |
133 | unless defined $syswrite && $syswrite == 3; |
134 | my $close = close BIG; |
135 | print "# close failed: $!\n" unless $close; |
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136 | unless($syswrite && $close) { |
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137 | if ($! =~/too large/i) { |
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138 | print "1..0 # Skip: writing past 2GB failed: process limits?\n"; |
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139 | } elsif ($! =~ /quota/i) { |
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140 | print "1..0 # Skip: filesystem quota limits?\n"; |
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141 | } |
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142 | explain(); |
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143 | bye(); |
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144 | } |
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145 | |
146 | @s = stat("big"); |
147 | |
148 | print "# @s\n"; |
149 | |
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150 | unless ($s[7] == 5_000_000_003) { |
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151 | print "1..0 # Skip: not configured to use large files?\n"; |
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152 | explain(); |
153 | bye(); |
154 | } |
155 | |
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156 | sub fail () { |
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157 | print "not "; |
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158 | $fail++; |
159 | } |
160 | |
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161 | print "1..17\n"; |
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162 | |
163 | my $fail = 0; |
164 | |
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165 | fail unless $s[7] == 5_000_000_003; # exercizes pp_stat |
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166 | print "ok 1\n"; |
167 | |
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168 | fail unless -s "big" == 5_000_000_003; # exercizes pp_ftsize |
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169 | print "ok 2\n"; |
170 | |
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171 | fail unless -e "big"; |
172 | print "ok 3\n"; |
173 | |
174 | fail unless -f "big"; |
175 | print "ok 4\n"; |
176 | |
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177 | sysopen(BIG, "big", O_RDONLY) or do { warn "sysopen failed: $!\n"; bye }; |
178 | |
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179 | fail unless sysseek(BIG, 4_500_000_000, SEEK_SET) == 4_500_000_000; |
180 | print "ok 5\n"; |
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181 | |
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182 | fail unless sysseek(BIG, 0, SEEK_CUR) == 4_500_000_000; |
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183 | print "ok 6\n"; |
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184 | |
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185 | fail unless sysseek(BIG, 1, SEEK_CUR) == 4_500_000_001; |
186 | print "ok 7\n"; |
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187 | |
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188 | fail unless sysseek(BIG, 0, SEEK_CUR) == 4_500_000_001; |
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189 | print "ok 8\n"; |
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190 | |
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191 | fail unless sysseek(BIG, -1, SEEK_CUR) == 4_500_000_000; |
192 | print "ok 9\n"; |
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193 | |
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194 | fail unless sysseek(BIG, 0, SEEK_CUR) == 4_500_000_000; |
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195 | print "ok 10\n"; |
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196 | |
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197 | fail unless sysseek(BIG, -3, SEEK_END) == 5_000_000_000; |
198 | print "ok 11\n"; |
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199 | |
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200 | fail unless sysseek(BIG, 0, SEEK_CUR) == 5_000_000_000; |
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201 | print "ok 12\n"; |
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202 | |
203 | my $big; |
204 | |
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205 | fail unless sysread(BIG, $big, 3) == 3; |
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206 | print "ok 13\n"; |
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207 | |
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208 | fail unless $big eq "big"; |
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209 | print "ok 14\n"; |
210 | |
211 | # 705_032_704 = (I32)5_000_000_000 |
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212 | fail unless sysseek(BIG, 705_032_704, SEEK_SET); |
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213 | print "ok 15\n"; |
214 | |
215 | my $zero; |
216 | |
217 | fail unless read(BIG, $zero, 3) == 3; |
218 | print "ok 16\n"; |
219 | |
220 | fail unless $zero eq "\0\0\0"; |
221 | print "ok 17\n"; |
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222 | |
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223 | explain if $fail; |
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224 | |
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225 | bye(); # does the necessary cleanup |
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226 | |
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227 | END { |
228 | unlink "big"; # be paranoid about leaving 5 gig files lying around |
229 | } |
230 | |
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231 | # eof |