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Re: [ID 20001229.001] Not OK: perl v5.7.0 +DEVEL8221 on i686-linux 2.4.0-test13pre4...
[perl5.git] / t / lib / syslfs.t
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ea2b5ef6 1# NOTE: this file tests how large files (>2GB) work with raw system IO.
93c29725 2# stdio: open(), tell(), seek(), print(), read() is tested in t/op/lfs.t.
ea2b5ef6
JH
3# If you modify/add tests here, remember to update also t/op/lfs.t.
4
5BEGIN {
ea2b5ef6 6 chdir 't' if -d 't';
20822f61 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) {
6afb513c 11 print "1..0 # Skip: no 64-bit file offsets\n";
48ea9154 12 exit(0);
9f8fdb7d 13 }
ca6e1c26 14 require Fcntl; import Fcntl qw(/^O_/ /^SEEK_/);
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15}
16
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A
17use strict;
18our @s;
19our $fail;
20
93c29725 21sub zap {
ea2b5ef6 22 close(BIG);
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23 unlink("big");
24 unlink("big1");
25 unlink("big2");
26}
27
28sub bye {
29 zap();
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30 exit(0);
31}
32
d731b481
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33my $explained;
34
fcbfa962 35sub explain {
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36 unless ($explained++) {
37 print <<EOM;
fcbfa962 38#
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39# If the lfs (large file support: large meaning larger than two
40# gigabytes) tests are skipped or fail, it may mean either that your
41# process (or process group) is not allowed to write large files
42# (resource limits) or that the file system (the network filesystem?)
43# you are running the tests on doesn't let your user/group have large
44# files (quota) or the filesystem simply doesn't support large files.
45# You may even need to reconfigure your kernel. (This is all very
46# operating system and site-dependent.)
fcbfa962
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47#
48# Perl may still be able to support large files, once you have
eed7fde4 49# such a process, enough quota, and such a (file) system.
d731b481 50# It is just that the test failed now.
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51#
52EOM
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53 }
54 print "1..0 # Skip: @_\n" if @_;
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55}
56
e0a10278
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57print "# checking whether we have sparse files...\n";
58
05f8a9f5 59# Known have-nots.
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60if ($^O eq 'MSWin32' || $^O eq 'VMS') {
61 print "1..0 # Skip: no sparse files in $^O\n";
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62 bye();
63}
64
b18f8161
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65# Known haves that have problems running this test
66# (for example because they do not support sparse files, like UNICOS)
67if ($^O eq 'unicos') {
86e48eb5 68 print "1..0 # Skip: no sparse files in $^0, unable to test large files\n";
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69 bye();
70}
71
e0a10278 72# Then try heuristically to deduce whether we have sparse files.
05f8a9f5 73
ea2b5ef6 74# We'll start off by creating a one megabyte file which has
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75# only three "true" bytes. If we have sparseness, we should
76# consume less blocks than one megabyte (assuming nobody has
77# one megabyte blocks...)
ea2b5ef6 78
93c29725
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79sysopen(BIG, "big1", O_WRONLY|O_CREAT|O_TRUNC) or
80 do { warn "sysopen big1 failed: $!\n"; bye };
81sysseek(BIG, 1_000_000, SEEK_SET) or
82 do { warn "sysseek big1 failed: $!\n"; bye };
83syswrite(BIG, "big") or
84 do { warn "syswrite big1 failed; $!\n"; bye };
85close(BIG) or
86 do { warn "close big1 failed: $!\n"; bye };
ea2b5ef6 87
93c29725 88my @s1 = stat("big1");
ea2b5ef6 89
93c29725 90print "# s1 = @s1\n";
ea2b5ef6 91
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92sysopen(BIG, "big2", O_WRONLY|O_CREAT|O_TRUNC) or
93 do { warn "sysopen big2 failed: $!\n"; bye };
94sysseek(BIG, 2_000_000, SEEK_SET) or
95 do { warn "sysseek big2 failed: $!\n"; bye };
96syswrite(BIG, "big") or
97 do { warn "syswrite big2 failed; $!\n"; bye };
98close(BIG) or
99 do { warn "close big2 failed: $!\n"; bye };
ea2b5ef6 100
93c29725 101my @s2 = stat("big2");
5cec1e3b 102
93c29725
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103print "# s2 = @s2\n";
104
105zap();
106
107unless ($s1[7] == 1_000_003 && $s2[7] == 2_000_003 &&
108 $s1[11] == $s2[11] && $s1[12] == $s2[12]) {
6afb513c 109 print "1..0 # Skip: no sparse files?\n";
93c29725 110 bye;
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111}
112
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113print "# we seem to have sparse files...\n";
114
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115# By now we better be sure that we do have sparse files:
116# if we are not, the following will hog 5 gigabytes of disk. Ooops.
6afb513c 117# This may fail by producing some signal; run in a subprocess first for safety
ea2b5ef6 118
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119$ENV{LC_ALL} = "C";
120
6afb513c
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121my $r = system '../perl', '-I../lib', '-e', <<'EOF';
122use Fcntl qw(/^O_/ /^SEEK_/);
123sysopen(BIG, "big", O_WRONLY|O_CREAT|O_TRUNC) or die $!;
124my $sysseek = sysseek(BIG, 5_000_000_000, SEEK_SET);
125my $syswrite = syswrite(BIG, "big");
126exit 0;
127EOF
128
cc4466b7 129sysopen(BIG, "big", O_WRONLY|O_CREAT|O_TRUNC) or
e0a10278
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130 do { warn "sysopen 'big' failed: $!\n"; bye };
131my $sysseek = sysseek(BIG, 5_000_000_000, SEEK_SET);
6afb513c
G
132unless (! $r && defined $sysseek && $sysseek == 5_000_000_000) {
133 $sysseek = 'undef' unless defined $sysseek;
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134 explain("seeking past 2GB failed: ",
135 $r ? 'signal '.($r & 0x7f) : "$! (sysseek returned $sysseek)");
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136 bye();
137}
eed7fde4 138
fcbfa962 139# The syswrite will fail if there are are filesize limitations (process or fs).
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140my $syswrite = syswrite(BIG, "big");
141print "# syswrite failed: $! (syswrite returned ",
142 defined $syswrite ? $syswrite : 'undef', ")\n"
143 unless defined $syswrite && $syswrite == 3;
144my $close = close BIG;
145print "# close failed: $!\n" unless $close;
eed7fde4 146unless($syswrite && $close) {
b948423f 147 if ($! =~/too large/i) {
d731b481 148 explain("writing past 2GB failed: process limits?");
b948423f 149 } elsif ($! =~ /quota/i) {
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150 explain("filesystem quota limits?");
151 } else {
152 explain("error: $!");
fcbfa962 153 }
eed7fde4 154 bye();
fcbfa962 155}
ea2b5ef6
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156
157@s = stat("big");
158
159print "# @s\n";
160
ae178db1 161unless ($s[7] == 5_000_000_003) {
d731b481 162 explain("kernel/fs not configured to use large files?");
ae178db1
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163 bye();
164}
165
05f8a9f5 166sub fail () {
64215065 167 print "not ";
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168 $fail++;
169}
170
326fd4b6
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171sub offset ($$) {
172 my ($offset_will_be, $offset_want) = @_;
173 my $offset_is = eval $offset_will_be;
174 unless ($offset_is == $offset_want) {
175 print "# bad offset $offset_is, want $offset_want\n";
176 if (unpack("L", pack("L", $offset_want)) == $offset_is) {
f06a04a3 177 my($offset_func) = ($offset_will_be =~ /^(\w+)/);
326fd4b6
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178 print "# 32-bit wraparound suspected in $offset_func() since\n";
179 print "# $offset_want cast into 32 bits is $offset_is.\n";
f06a04a3
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180 } elsif ($offset_want - unpack("L", pack("L", $offset_want)) - 1
181 == $offset_is){
182 my($offset_func) = ($offset_will_be =~ /^(\w+)/);
183 print "# 32-bit wraparound suspected in $offset_func() since\n";
184 printf "# %s - unpack('L', pack('L', %s)) - 1 equals %s.\n",
185 $offset_want,
186 $offset_want,
187 $offset_is;
188 }
326fd4b6
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189 fail;
190 }
191}
192
77166d51 193print "1..17\n";
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194
195my $fail = 0;
196
64215065 197fail unless $s[7] == 5_000_000_003; # exercizes pp_stat
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198print "ok 1\n";
199
64215065 200fail unless -s "big" == 5_000_000_003; # exercizes pp_ftsize
ea2b5ef6
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201print "ok 2\n";
202
77166d51
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203fail unless -e "big";
204print "ok 3\n";
205
206fail unless -f "big";
207print "ok 4\n";
208
ea2b5ef6
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209sysopen(BIG, "big", O_RDONLY) or do { warn "sysopen failed: $!\n"; bye };
210
326fd4b6 211offset('sysseek(BIG, 4_500_000_000, SEEK_SET)', 4_500_000_000);
77166d51 212print "ok 5\n";
ea2b5ef6 213
326fd4b6 214offset('sysseek(BIG, 0, SEEK_CUR)', 4_500_000_000);
77166d51 215print "ok 6\n";
ea2b5ef6 216
326fd4b6 217offset('sysseek(BIG, 1, SEEK_CUR)', 4_500_000_001);
77166d51 218print "ok 7\n";
ea2b5ef6 219
326fd4b6 220offset('sysseek(BIG, 0, SEEK_CUR)', 4_500_000_001);
77166d51 221print "ok 8\n";
ea2b5ef6 222
326fd4b6 223offset('sysseek(BIG, -1, SEEK_CUR)', 4_500_000_000);
77166d51 224print "ok 9\n";
ea2b5ef6 225
326fd4b6 226offset('sysseek(BIG, 0, SEEK_CUR)', 4_500_000_000);
77166d51 227print "ok 10\n";
ea2b5ef6 228
326fd4b6 229offset('sysseek(BIG, -3, SEEK_END)', 5_000_000_000);
77166d51 230print "ok 11\n";
ea2b5ef6 231
326fd4b6 232offset('sysseek(BIG, 0, SEEK_CUR)', 5_000_000_000);
77166d51 233print "ok 12\n";
ea2b5ef6
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234
235my $big;
236
05f8a9f5 237fail unless sysread(BIG, $big, 3) == 3;
77166d51 238print "ok 13\n";
ea2b5ef6 239
05f8a9f5 240fail unless $big eq "big";
77166d51
JH
241print "ok 14\n";
242
243# 705_032_704 = (I32)5_000_000_000
326fd4b6
A
244# See that we don't have "big" in the 705_... spot:
245# that would mean that we have a wraparound.
a5853b9e 246fail unless sysseek(BIG, 705_032_704, SEEK_SET);
77166d51
JH
247print "ok 15\n";
248
249my $zero;
250
251fail unless read(BIG, $zero, 3) == 3;
252print "ok 16\n";
253
254fail unless $zero eq "\0\0\0";
255print "ok 17\n";
ea2b5ef6 256
d731b481 257explain() if $fail;
05f8a9f5 258
77166d51 259bye(); # does the necessary cleanup
e9a694fc 260
290be4b1
JH
261END {
262 unlink "big"; # be paranoid about leaving 5 gig files lying around
263}
264
ea2b5ef6 265# eof