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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'; |
7 | unshift @INC, '../lib'; |
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8 | # Don't bother if there are no quad offsets. |
9 | require Config; import Config; |
10 | if ($Config{lseeksize} < 8) { |
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11 | print "1..0\n# no 64-bit file offsets\n"; |
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12 | exit(0); |
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13 | } |
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14 | } |
15 | |
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16 | sub bye { |
17 | close(BIG); |
18 | unlink "big"; |
19 | exit(0); |
20 | } |
21 | |
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22 | sub explain { |
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23 | print <<EOM; |
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24 | # |
25 | # If the lfs (large file support: large meaning larger than two gigabytes) |
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26 | # tests are skipped or fail, it may mean either that your process |
27 | # (or process group) is not allowed to write large files (resource |
28 | # limits) or that the file system you are running the tests on doesn't |
29 | # let your user/group have large files (quota) or the filesystem simply |
30 | # doesn't support large files. You may even need to reconfigure your kernel. |
31 | # (This is all very operating system and site-dependent.) |
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32 | # |
33 | # Perl may still be able to support large files, once you have |
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34 | # such a process, enough quota, and such a (file) system. |
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35 | # |
36 | EOM |
37 | } |
38 | |
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39 | # Known have-nots. |
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40 | if ($^O eq 'win32' || $^O eq 'vms') { |
41 | print "1..0\n# no sparse files\n"; |
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42 | bye(); |
43 | } |
44 | |
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45 | # Known haves that have problems running this test |
46 | # (for example because they do not support sparse files, like UNICOS) |
47 | if ($^O eq 'unicos') { |
48 | print "1..0\n# large files known to work but unable to test them here\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 | # Let's not depend on Fcntl or any other extension. |
55 | |
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56 | my ($SEEK_SET, $SEEK_CUR, $SEEK_END) = (0, 1, 2); |
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57 | |
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58 | # We'll start off by creating a one megabyte file which has |
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59 | # only three "true" bytes. If we have sparseness, we should |
60 | # consume less blocks than one megabyte (assuming nobody has |
61 | # one megabyte blocks...) |
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62 | |
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63 | open(BIG, ">big") or do { warn "open failed: $!\n"; bye }; |
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64 | binmode BIG; |
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65 | seek(BIG, 1_000_000, $SEEK_SET); |
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66 | print BIG "big"; |
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67 | close(BIG); |
68 | |
69 | my @s; |
70 | |
71 | @s = stat("big"); |
72 | |
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73 | print "# @s\n"; |
74 | |
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75 | my $BLOCKSIZE = $s[11] || 512; |
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76 | |
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77 | unless (@s == 13 && |
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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"; |
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82 | bye(); |
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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 | open(BIG, ">big") or do { warn "open failed: $!\n"; bye }; |
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91 | binmode BIG; |
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92 | seek(BIG, 5_000_000_000, $SEEK_SET); |
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93 | |
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94 | # Either the print or (more likely, thanks to buffering) the close will |
95 | # fail if there are are filesize limitations (process or fs). |
96 | my $print = print BIG "big"; |
97 | my $close = close BIG if $print; |
98 | unless ($print && $close) { |
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99 | unless ($print) { |
100 | print "# print failed: $!\n" |
101 | } else { |
102 | print "# close failed: $!\n" |
103 | } |
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104 | if ($! =~/too large/i) { |
105 | print "1..0\n# writing past 2GB failed: process limits?\n"; |
106 | } elsif ($! =~ /quota/i) { |
107 | print "1..0\n# filesystem quota limits?\n"; |
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108 | } |
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109 | explain(); |
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110 | bye(); |
111 | } |
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112 | |
113 | @s = stat("big"); |
114 | |
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115 | print "# @s\n"; |
116 | |
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117 | unless ($s[7] == 5_000_000_003) { |
118 | print "1..0\n# not configured to use large files?\n"; |
119 | explain(); |
120 | bye(); |
121 | } |
122 | |
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123 | sub fail () { |
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124 | print "not "; |
05f8a9f5 |
125 | $fail++; |
126 | } |
127 | |
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128 | print "1..17\n"; |
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129 | |
130 | my $fail = 0; |
131 | |
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132 | fail unless $s[7] == 5_000_000_003; # exercizes pp_stat |
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133 | print "ok 1\n"; |
134 | |
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135 | fail unless -s "big" == 5_000_000_003; # exercizes pp_ftsize |
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136 | print "ok 2\n"; |
137 | |
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138 | fail unless -e "big"; |
139 | print "ok 3\n"; |
140 | |
141 | fail unless -f "big"; |
142 | print "ok 4\n"; |
143 | |
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144 | open(BIG, "big") or do { warn "open failed: $!\n"; bye }; |
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145 | binmode BIG; |
146 | |
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147 | fail unless seek(BIG, 4_500_000_000, $SEEK_SET); |
148 | print "ok 5\n"; |
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149 | |
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150 | fail unless tell(BIG) == 4_500_000_000; |
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151 | print "ok 6\n"; |
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152 | |
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153 | fail unless seek(BIG, 1, $SEEK_CUR); |
154 | print "ok 7\n"; |
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155 | |
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156 | fail unless tell(BIG) == 4_500_000_001; |
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157 | print "ok 8\n"; |
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158 | |
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159 | fail unless seek(BIG, -1, $SEEK_CUR); |
160 | print "ok 9\n"; |
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161 | |
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162 | fail unless tell(BIG) == 4_500_000_000; |
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163 | print "ok 10\n"; |
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164 | |
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165 | fail unless seek(BIG, -3, $SEEK_END); |
166 | print "ok 11\n"; |
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167 | |
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168 | fail unless tell(BIG) == 5_000_000_000; |
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169 | print "ok 12\n"; |
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170 | |
171 | my $big; |
172 | |
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173 | fail unless read(BIG, $big, 3) == 3; |
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174 | print "ok 13\n"; |
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175 | |
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176 | fail unless $big eq "big"; |
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177 | print "ok 14\n"; |
178 | |
179 | # 705_032_704 = (I32)5_000_000_000 |
180 | fail unless seek(BIG, 705_032_704, $SEEK_SET); |
181 | print "ok 15\n"; |
182 | |
183 | my $zero; |
184 | |
185 | fail unless read(BIG, $zero, 3) == 3; |
186 | print "ok 16\n"; |
187 | |
188 | fail unless $zero eq "\0\0\0"; |
189 | print "ok 17\n"; |
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190 | |
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191 | explain if $fail; |
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192 | |
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193 | bye(); # does the necessary cleanup |
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194 | |
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195 | END { |
196 | unlink "big"; # be paranoid about leaving 5 gig files lying around |
197 | } |
198 | |
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199 | # eof |