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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 | chdir 't' if -d 't'; |
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7 | @INC = '../lib'; |
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8 | # Don't bother if there are no quad offsets. |
9 | require Config; import Config; |
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 | } |
15 | |
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16 | sub zap { |
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17 | close(BIG); |
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18 | unlink("big"); |
19 | unlink("big1"); |
20 | unlink("big2"); |
21 | } |
22 | |
23 | sub bye { |
24 | zap(); |
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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 |
33 | # (or process group) is not allowed to write large files (resource |
34 | # limits) or that the file system you are running the tests on doesn't |
35 | # let your user/group have large files (quota) or the filesystem simply |
36 | # doesn't support large files. You may even need to reconfigure your kernel. |
37 | # (This is all very operating system and site-dependent.) |
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38 | # |
39 | # Perl may still be able to support large files, once you have |
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40 | # such a process, enough quota, and such a (file) system. |
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41 | # |
42 | EOM |
43 | } |
44 | |
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45 | print "# checking whether we have sparse files...\n"; |
46 | |
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47 | # Known have-nots. |
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48 | if ($^O eq 'win32' || $^O eq 'vms') { |
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49 | print "1..0 # Skip: no sparse files (because this is $^O) \n"; |
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50 | bye(); |
51 | } |
52 | |
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53 | # Known haves that have problems running this test |
54 | # (for example because they do not support sparse files, like UNICOS) |
55 | if ($^O eq 'unicos') { |
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56 | print "1..0 # Skip: large files known to work but unable to test them here ($^O)\n"; |
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57 | bye(); |
58 | } |
59 | |
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60 | # Then try to heuristically deduce whether we have sparse files. |
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61 | |
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62 | # Let's not depend on Fcntl or any other extension. |
63 | |
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64 | my ($SEEK_SET, $SEEK_CUR, $SEEK_END) = (0, 1, 2); |
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65 | |
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66 | # We'll start off by creating a one megabyte file which has |
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67 | # only three "true" bytes. If we have sparseness, we should |
68 | # consume less blocks than one megabyte (assuming nobody has |
69 | # one megabyte blocks...) |
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70 | |
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71 | open(BIG, ">big1") or |
72 | do { warn "open big1 failed: $!\n"; bye }; |
73 | binmode(BIG) or |
74 | do { warn "binmode big1 failed: $!\n"; bye }; |
75 | seek(BIG, 1_000_000, $SEEK_SET) or |
76 | do { warn "seek big1 failed: $!\n"; bye }; |
77 | print BIG "big" or |
78 | do { warn "print big1 failed: $!\n"; bye }; |
79 | close(BIG) or |
80 | do { warn "close big1 failed: $!\n"; bye }; |
81 | |
82 | my @s1 = stat("big1"); |
83 | |
84 | print "# s1 = @s1\n"; |
85 | |
86 | open(BIG, ">big2") or |
87 | do { warn "open big2 failed: $!\n"; bye }; |
88 | binmode(BIG) or |
89 | do { warn "binmode big2 failed: $!\n"; bye }; |
90 | seek(BIG, 2_000_000, $SEEK_SET) or |
91 | do { warn "seek big2 failed; $!\n"; bye }; |
92 | print BIG "big" or |
93 | do { warn "print big2 failed; $!\n"; bye }; |
94 | close(BIG) or |
95 | do { warn "close big2 failed; $!\n"; bye }; |
96 | |
97 | my @s2 = stat("big2"); |
98 | |
99 | print "# s2 = @s2\n"; |
100 | |
101 | zap(); |
102 | |
103 | unless ($s1[7] == 1_000_003 && $s2[7] == 2_000_003 && |
104 | $s1[11] == $s2[11] && $s1[12] == $s2[12]) { |
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105 | print "1..0 # Skip: no sparse files?\n"; |
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106 | bye; |
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107 | } |
108 | |
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109 | print "# we seem to have sparse files...\n"; |
110 | |
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111 | # By now we better be sure that we do have sparse files: |
112 | # if we are not, the following will hog 5 gigabytes of disk. Ooops. |
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113 | # This may fail by producing some signal; run in a subprocess first for safety |
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114 | |
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115 | $ENV{LC_ALL} = "C"; |
116 | |
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117 | my $r = system '../perl', '-e', <<'EOF'; |
118 | open(BIG, ">big"); |
119 | seek(BIG, 5_000_000_000, 0); |
120 | print BIG "big"; |
121 | exit 0; |
122 | EOF |
123 | |
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124 | open(BIG, ">big") or do { warn "open failed: $!\n"; bye }; |
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125 | binmode BIG; |
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126 | if ($r or not seek(BIG, 5_000_000_000, $SEEK_SET)) { |
127 | my $err = $r ? 'signal '.($r & 0x7f) : $!; |
128 | print "1..0 # Skip: seeking past 2GB failed: $err\n"; |
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129 | explain(); |
130 | bye(); |
131 | } |
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132 | |
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133 | # Either the print or (more likely, thanks to buffering) the close will |
134 | # fail if there are are filesize limitations (process or fs). |
135 | my $print = print BIG "big"; |
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136 | print "# print failed: $!\n" unless $print; |
137 | my $close = close BIG; |
138 | print "# close failed: $!\n" unless $close; |
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139 | unless ($print && $close) { |
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140 | if ($! =~/too large/i) { |
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141 | print "1..0 # Skip: writing past 2GB failed: process limits?\n"; |
b948423f |
142 | } elsif ($! =~ /quota/i) { |
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143 | print "1..0 # Skip: filesystem quota limits?\n"; |
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144 | } |
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145 | explain(); |
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146 | bye(); |
147 | } |
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148 | |
149 | @s = stat("big"); |
150 | |
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151 | print "# @s\n"; |
152 | |
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153 | unless ($s[7] == 5_000_000_003) { |
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154 | print "1..0 # Skip: not configured to use large files?\n"; |
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155 | explain(); |
156 | bye(); |
157 | } |
158 | |
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159 | sub fail () { |
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160 | print "not "; |
05f8a9f5 |
161 | $fail++; |
162 | } |
163 | |
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164 | print "1..17\n"; |
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165 | |
166 | my $fail = 0; |
167 | |
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168 | fail unless $s[7] == 5_000_000_003; # exercizes pp_stat |
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169 | print "ok 1\n"; |
170 | |
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171 | fail unless -s "big" == 5_000_000_003; # exercizes pp_ftsize |
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172 | print "ok 2\n"; |
173 | |
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174 | fail unless -e "big"; |
175 | print "ok 3\n"; |
176 | |
177 | fail unless -f "big"; |
178 | print "ok 4\n"; |
179 | |
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180 | open(BIG, "big") or do { warn "open failed: $!\n"; bye }; |
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181 | binmode BIG; |
182 | |
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183 | fail unless seek(BIG, 4_500_000_000, $SEEK_SET); |
184 | print "ok 5\n"; |
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185 | |
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186 | fail unless tell(BIG) == 4_500_000_000; |
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187 | print "ok 6\n"; |
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188 | |
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189 | fail unless seek(BIG, 1, $SEEK_CUR); |
190 | print "ok 7\n"; |
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191 | |
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192 | fail unless tell(BIG) == 4_500_000_001; |
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193 | print "ok 8\n"; |
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194 | |
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195 | fail unless seek(BIG, -1, $SEEK_CUR); |
196 | print "ok 9\n"; |
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197 | |
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198 | fail unless tell(BIG) == 4_500_000_000; |
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199 | print "ok 10\n"; |
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200 | |
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201 | fail unless seek(BIG, -3, $SEEK_END); |
202 | print "ok 11\n"; |
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203 | |
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204 | fail unless tell(BIG) == 5_000_000_000; |
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205 | print "ok 12\n"; |
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206 | |
207 | my $big; |
208 | |
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209 | fail unless read(BIG, $big, 3) == 3; |
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210 | print "ok 13\n"; |
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211 | |
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212 | fail unless $big eq "big"; |
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213 | print "ok 14\n"; |
214 | |
215 | # 705_032_704 = (I32)5_000_000_000 |
216 | fail unless seek(BIG, 705_032_704, $SEEK_SET); |
217 | print "ok 15\n"; |
218 | |
219 | my $zero; |
220 | |
221 | fail unless read(BIG, $zero, 3) == 3; |
222 | print "ok 16\n"; |
223 | |
224 | fail unless $zero eq "\0\0\0"; |
225 | print "ok 17\n"; |
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226 | |
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227 | explain if $fail; |
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228 | |
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229 | bye(); # does the necessary cleanup |
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230 | |
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231 | END { |
232 | unlink "big"; # be paranoid about leaving 5 gig files lying around |
233 | } |
234 | |
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235 | # eof |