This is a live mirror of the Perl 5 development currently hosted at https://github.com/perl/perl5
Get UTF16 BOMs working. Patch from
[perl5.git] / t / lib / syslfs.t
CommitLineData
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
JH
6 chdir 't' if -d 't';
7 unshift @INC, '../lib';
9f8fdb7d
JH
8 require Config; import Config;
9 # Don't bother if there are no quad offsets.
10 if ($Config{lseeksize} < 8) {
64215065 11 print "1..0\n# no 64-bit file offsets\n";
48ea9154 12 exit(0);
9f8fdb7d 13 }
ca6e1c26 14 require Fcntl; import Fcntl qw(/^O_/ /^SEEK_/);
ea2b5ef6
JH
15}
16
93c29725 17sub zap {
ea2b5ef6 18 close(BIG);
93c29725
JH
19 unlink("big");
20 unlink("big1");
21 unlink("big2");
22}
23
24sub bye {
25 zap();
ea2b5ef6
JH
26 exit(0);
27}
28
fcbfa962 29sub explain {
2d4389e4 30 print <<EOM;
fcbfa962
JH
31#
32# If the lfs (large file support: large meaning larger than two gigabytes)
eed7fde4
JH
33# tests are skipped or fail, it may mean either that your process
34# (or process group) is not allowed to write large files (resource
35# limits) or that the file system you are running the tests on doesn't
36# let your user/group have large files (quota) or the filesystem simply
37# doesn't support large files. You may even need to reconfigure your kernel.
38# (This is all very operating system and site-dependent.)
fcbfa962
JH
39#
40# Perl may still be able to support large files, once you have
eed7fde4 41# such a process, enough quota, and such a (file) system.
fcbfa962
JH
42#
43EOM
44}
45
e0a10278
JH
46print "# checking whether we have sparse files...\n";
47
05f8a9f5 48# Known have-nots.
ea2b5ef6 49if ($^O eq 'win32' || $^O eq 'vms') {
e0a10278 50 print "1..0\n# no sparse files (because this is $^O) \n";
ea2b5ef6
JH
51 bye();
52}
53
b18f8161
JH
54# Known haves that have problems running this test
55# (for example because they do not support sparse files, like UNICOS)
56if ($^O eq 'unicos') {
e0a10278 57 print "1..0\n# large files known to work but unable to test them here ($^O)\n";
b18f8161
JH
58 bye();
59}
60
e0a10278 61# Then try heuristically to deduce whether we have sparse files.
05f8a9f5 62
ea2b5ef6 63# We'll start off by creating a one megabyte file which has
05f8a9f5
JH
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...)
ea2b5ef6 67
93c29725
JH
68sysopen(BIG, "big1", O_WRONLY|O_CREAT|O_TRUNC) or
69 do { warn "sysopen big1 failed: $!\n"; bye };
70sysseek(BIG, 1_000_000, SEEK_SET) or
71 do { warn "sysseek big1 failed: $!\n"; bye };
72syswrite(BIG, "big") or
73 do { warn "syswrite big1 failed; $!\n"; bye };
74close(BIG) or
75 do { warn "close big1 failed: $!\n"; bye };
ea2b5ef6 76
93c29725 77my @s1 = stat("big1");
ea2b5ef6 78
93c29725 79print "# s1 = @s1\n";
ea2b5ef6 80
93c29725
JH
81sysopen(BIG, "big2", O_WRONLY|O_CREAT|O_TRUNC) or
82 do { warn "sysopen big2 failed: $!\n"; bye };
83sysseek(BIG, 2_000_000, SEEK_SET) or
84 do { warn "sysseek big2 failed: $!\n"; bye };
85syswrite(BIG, "big") or
86 do { warn "syswrite big2 failed; $!\n"; bye };
87close(BIG) or
88 do { warn "close big2 failed: $!\n"; bye };
ea2b5ef6 89
93c29725 90my @s2 = stat("big2");
5cec1e3b 91
93c29725
JH
92print "# s2 = @s2\n";
93
94zap();
95
96unless ($s1[7] == 1_000_003 && $s2[7] == 2_000_003 &&
97 $s1[11] == $s2[11] && $s1[12] == $s2[12]) {
98 print "1..0\n#no sparse files?\n";
99 bye;
ea2b5ef6
JH
100}
101
e0a10278
JH
102print "# we seem to have sparse files...\n";
103
ea2b5ef6
JH
104# By now we better be sure that we do have sparse files:
105# if we are not, the following will hog 5 gigabytes of disk. Ooops.
106
eed7fde4
JH
107$ENV{LC_ALL} = "C";
108
cc4466b7 109sysopen(BIG, "big", O_WRONLY|O_CREAT|O_TRUNC) or
e0a10278
JH
110 do { warn "sysopen 'big' failed: $!\n"; bye };
111my $sysseek = sysseek(BIG, 5_000_000_000, SEEK_SET);
112unless (defined $sysseek && $sysseek == 5_000_000_000) {
113 print "1..0\n# seeking past 2GB failed: $! (sysseek returned ",
114 defined $sysseek ? $sysseek : 'undef', ")\n";
115 explain();
116 bye();
117}
eed7fde4 118
fcbfa962 119# The syswrite will fail if there are are filesize limitations (process or fs).
e0a10278
JH
120my $syswrite = syswrite(BIG, "big");
121print "# syswrite failed: $! (syswrite returned ",
122 defined $syswrite ? $syswrite : 'undef', ")\n"
123 unless defined $syswrite && $syswrite == 3;
124my $close = close BIG;
125print "# close failed: $!\n" unless $close;
eed7fde4 126unless($syswrite && $close) {
b948423f
JH
127 if ($! =~/too large/i) {
128 print "1..0\n# writing past 2GB failed: process limits?\n";
129 } elsif ($! =~ /quota/i) {
130 print "1..0\n# filesystem quota limits?\n";
fcbfa962 131 }
56d29690 132 explain();
eed7fde4 133 bye();
fcbfa962 134}
ea2b5ef6
JH
135
136@s = stat("big");
137
138print "# @s\n";
139
ae178db1
JH
140unless ($s[7] == 5_000_000_003) {
141 print "1..0\n# not configured to use large files?\n";
142 explain();
143 bye();
144}
145
05f8a9f5 146sub fail () {
64215065 147 print "not ";
05f8a9f5
JH
148 $fail++;
149}
150
77166d51 151print "1..17\n";
fcbfa962
JH
152
153my $fail = 0;
154
64215065 155fail unless $s[7] == 5_000_000_003; # exercizes pp_stat
ea2b5ef6
JH
156print "ok 1\n";
157
64215065 158fail unless -s "big" == 5_000_000_003; # exercizes pp_ftsize
ea2b5ef6
JH
159print "ok 2\n";
160
77166d51
JH
161fail unless -e "big";
162print "ok 3\n";
163
164fail unless -f "big";
165print "ok 4\n";
166
ea2b5ef6
JH
167sysopen(BIG, "big", O_RDONLY) or do { warn "sysopen failed: $!\n"; bye };
168
77166d51
JH
169fail unless sysseek(BIG, 4_500_000_000, SEEK_SET) == 4_500_000_000;
170print "ok 5\n";
ea2b5ef6 171
05f8a9f5 172fail unless sysseek(BIG, 0, SEEK_CUR) == 4_500_000_000;
77166d51 173print "ok 6\n";
ea2b5ef6 174
77166d51
JH
175fail unless sysseek(BIG, 1, SEEK_CUR) == 4_500_000_001;
176print "ok 7\n";
ea2b5ef6 177
05f8a9f5 178fail unless sysseek(BIG, 0, SEEK_CUR) == 4_500_000_001;
77166d51 179print "ok 8\n";
ea2b5ef6 180
77166d51
JH
181fail unless sysseek(BIG, -1, SEEK_CUR) == 4_500_000_000;
182print "ok 9\n";
ea2b5ef6 183
05f8a9f5 184fail unless sysseek(BIG, 0, SEEK_CUR) == 4_500_000_000;
77166d51 185print "ok 10\n";
ea2b5ef6 186
77166d51
JH
187fail unless sysseek(BIG, -3, SEEK_END) == 5_000_000_000;
188print "ok 11\n";
ea2b5ef6 189
05f8a9f5 190fail unless sysseek(BIG, 0, SEEK_CUR) == 5_000_000_000;
77166d51 191print "ok 12\n";
ea2b5ef6
JH
192
193my $big;
194
05f8a9f5 195fail unless sysread(BIG, $big, 3) == 3;
77166d51 196print "ok 13\n";
ea2b5ef6 197
05f8a9f5 198fail unless $big eq "big";
77166d51
JH
199print "ok 14\n";
200
201# 705_032_704 = (I32)5_000_000_000
93c29725 202fail unless seek(BIG, 705_032_704, SEEK_SET);
77166d51
JH
203print "ok 15\n";
204
205my $zero;
206
207fail unless read(BIG, $zero, 3) == 3;
208print "ok 16\n";
209
210fail unless $zero eq "\0\0\0";
211print "ok 17\n";
ea2b5ef6 212
fcbfa962 213explain if $fail;
05f8a9f5 214
77166d51 215bye(); # does the necessary cleanup
e9a694fc 216
290be4b1
JH
217END {
218 unlink "big"; # be paranoid about leaving 5 gig files lying around
219}
220
ea2b5ef6 221# eof