Move the require './test.pl' to the end of t/comp/hints.t
[p5sagit/p5-mst-13.2.git] / t / op / lfs.t
CommitLineData
ea2b5ef6 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.
4d0ed6f7 3# If you modify/add tests here, remember to update also ext/Fcntl/t/syslfs.t.
ea2b5ef6 4
817e2dcb 5BEGIN {
ea2b5ef6 6 chdir 't' if -d 't';
20822f61 7 @INC = '../lib';
9f8fdb7d 8 # Don't bother if there are no quad offsets.
9 require Config; import Config;
10 if ($Config{lseeksize} < 8) {
6afb513c 11 print "1..0 # Skip: no 64-bit file offsets\n";
48ea9154 12 exit(0);
9f8fdb7d 13 }
1c25d394 14 require './test.pl';
817e2dcb 15}
16
326fd4b6 17use strict;
52ece81a 18
326fd4b6 19our @s;
20our $fail;
21
1c25d394 22my $big0 = tempfile();
23my $big1 = tempfile();
24my $big2 = tempfile();
25
93c29725 26sub zap {
6da84e39 27 close(BIG);
93c29725 28}
29
30sub bye {
31 zap();
6da84e39 32 exit(0);
33}
34
d731b481 35my $explained;
36
fcbfa962 37sub explain {
d731b481 38 unless ($explained++) {
39 print <<EOM;
fcbfa962 40#
d731b481 41# If the lfs (large file support: large meaning larger than two
42# gigabytes) tests are skipped or fail, it may mean either that your
43# process (or process group) is not allowed to write large files
44# (resource limits) or that the file system (the network filesystem?)
45# you are running the tests on doesn't let your user/group have large
46# files (quota) or the filesystem simply doesn't support large files.
47# You may even need to reconfigure your kernel. (This is all very
48# operating system and site-dependent.)
fcbfa962 49#
50# Perl may still be able to support large files, once you have
eed7fde4 51# such a process, enough quota, and such a (file) system.
d731b481 52# It is just that the test failed now.
fcbfa962 53#
54EOM
d731b481 55 }
56 print "1..0 # Skip: @_\n" if @_;
fcbfa962 57}
58
0ecd3ba2 59$| = 1;
60
e0a10278 61print "# checking whether we have sparse files...\n";
62
05f8a9f5 63# Known have-nots.
2986a63f 64if ($^O eq 'MSWin32' || $^O eq 'NetWare' || $^O eq 'VMS') {
86e48eb5 65 print "1..0 # Skip: no sparse files in $^O\n";
6da84e39 66 bye();
67}
68
b18f8161 69# Known haves that have problems running this test
70# (for example because they do not support sparse files, like UNICOS)
71if ($^O eq 'unicos') {
972720f9 72 print "1..0 # Skip: no sparse files in $^O, unable to test large files\n";
b18f8161 73 bye();
74}
75
e0a10278 76# Then try to heuristically deduce whether we have sparse files.
05f8a9f5 77
64215065 78# Let's not depend on Fcntl or any other extension.
79
ea2b5ef6 80my ($SEEK_SET, $SEEK_CUR, $SEEK_END) = (0, 1, 2);
6da84e39 81
ea2b5ef6 82# We'll start off by creating a one megabyte file which has
05f8a9f5 83# only three "true" bytes. If we have sparseness, we should
84# consume less blocks than one megabyte (assuming nobody has
85# one megabyte blocks...)
817e2dcb 86
1c25d394 87open(BIG, ">$big1") or
88 do { warn "open $big1 failed: $!\n"; bye };
93c29725 89binmode(BIG) or
1c25d394 90 do { warn "binmode $big1 failed: $!\n"; bye };
93c29725 91seek(BIG, 1_000_000, $SEEK_SET) or
1c25d394 92 do { warn "seek $big1 failed: $!\n"; bye };
93c29725 93print BIG "big" or
1c25d394 94 do { warn "print $big1 failed: $!\n"; bye };
93c29725 95close(BIG) or
1c25d394 96 do { warn "close $big1 failed: $!\n"; bye };
93c29725 97
1c25d394 98my @s1 = stat($big1);
93c29725 99
100print "# s1 = @s1\n";
101
1c25d394 102open(BIG, ">$big2") or
103 do { warn "open $big2 failed: $!\n"; bye };
93c29725 104binmode(BIG) or
1c25d394 105 do { warn "binmode $big2 failed: $!\n"; bye };
93c29725 106seek(BIG, 2_000_000, $SEEK_SET) or
1c25d394 107 do { warn "seek $big2 failed; $!\n"; bye };
93c29725 108print BIG "big" or
1c25d394 109 do { warn "print $big2 failed; $!\n"; bye };
93c29725 110close(BIG) or
1c25d394 111 do { warn "close $big2 failed; $!\n"; bye };
93c29725 112
1c25d394 113my @s2 = stat($big2);
93c29725 114
115print "# s2 = @s2\n";
116
117zap();
118
119unless ($s1[7] == 1_000_003 && $s2[7] == 2_000_003 &&
411c7dd7 120 $s1[11] == $s2[11] && $s1[12] == $s2[12] &&
121 $s1[12] > 0) {
6afb513c 122 print "1..0 # Skip: no sparse files?\n";
93c29725 123 bye;
817e2dcb 124}
125
e0a10278 126print "# we seem to have sparse files...\n";
127
817e2dcb 128# By now we better be sure that we do have sparse files:
129# if we are not, the following will hog 5 gigabytes of disk. Ooops.
6afb513c 130# This may fail by producing some signal; run in a subprocess first for safety
817e2dcb 131
eed7fde4 132$ENV{LC_ALL} = "C";
133
6afb513c 134my $r = system '../perl', '-e', <<'EOF';
1c25d394 135open(BIG, ">$big0");
6afb513c 136seek(BIG, 5_000_000_000, 0);
1c25d394 137print BIG $big0;
6afb513c 138exit 0;
139EOF
140
1c25d394 141open(BIG, ">$big0") or do { warn "open failed: $!\n"; bye };
817e2dcb 142binmode BIG;
6afb513c 143if ($r or not seek(BIG, 5_000_000_000, $SEEK_SET)) {
144 my $err = $r ? 'signal '.($r & 0x7f) : $!;
d731b481 145 explain("seeking past 2GB failed: $err");
e0a10278 146 bye();
147}
eed7fde4 148
fcbfa962 149# Either the print or (more likely, thanks to buffering) the close will
150# fail if there are are filesize limitations (process or fs).
151my $print = print BIG "big";
e0a10278 152print "# print failed: $!\n" unless $print;
153my $close = close BIG;
154print "# close failed: $!\n" unless $close;
fcbfa962 155unless ($print && $close) {
b948423f 156 if ($! =~/too large/i) {
d731b481 157 explain("writing past 2GB failed: process limits?");
b948423f 158 } elsif ($! =~ /quota/i) {
d731b481 159 explain("filesystem quota limits?");
160 } else {
161 explain("error: $!");
fcbfa962 162 }
163 bye();
164}
817e2dcb 165
1c25d394 166@s = stat($big0);
817e2dcb 167
ea2b5ef6 168print "# @s\n";
169
ae178db1 170unless ($s[7] == 5_000_000_003) {
d731b481 171 explain("kernel/fs not configured to use large files?");
ae178db1 172 bye();
173}
174
1c25d394 175sub fail {
64215065 176 print "not ";
05f8a9f5 177 $fail++;
178}
179
326fd4b6 180sub offset ($$) {
181 my ($offset_will_be, $offset_want) = @_;
182 my $offset_is = eval $offset_will_be;
183 unless ($offset_is == $offset_want) {
184 print "# bad offset $offset_is, want $offset_want\n";
52ece81a 185 my ($offset_func) = ($offset_will_be =~ /^(\w+)/);
326fd4b6 186 if (unpack("L", pack("L", $offset_want)) == $offset_is) {
326fd4b6 187 print "# 32-bit wraparound suspected in $offset_func() since\n";
52ece81a 188 print "# $offset_want cast into 32 bits equals $offset_is.\n";
f06a04a3 189 } elsif ($offset_want - unpack("L", pack("L", $offset_want)) - 1
52ece81a 190 == $offset_is) {
f06a04a3 191 print "# 32-bit wraparound suspected in $offset_func() since\n";
192 printf "# %s - unpack('L', pack('L', %s)) - 1 equals %s.\n",
193 $offset_want,
194 $offset_want,
195 $offset_is;
196 }
326fd4b6 197 fail;
198 }
199}
200
77166d51 201print "1..17\n";
fcbfa962 202
52ece81a 203$fail = 0;
fcbfa962 204
64215065 205fail unless $s[7] == 5_000_000_003; # exercizes pp_stat
817e2dcb 206print "ok 1\n";
207
1c25d394 208fail unless -s $big0 == 5_000_000_003; # exercizes pp_ftsize
817e2dcb 209print "ok 2\n";
210
1c25d394 211fail unless -e $big0;
77166d51 212print "ok 3\n";
213
1c25d394 214fail unless -f $big0;
77166d51 215print "ok 4\n";
216
1c25d394 217open(BIG, $big0) or do { warn "open failed: $!\n"; bye };
817e2dcb 218binmode BIG;
219
77166d51 220fail unless seek(BIG, 4_500_000_000, $SEEK_SET);
221print "ok 5\n";
817e2dcb 222
326fd4b6 223offset('tell(BIG)', 4_500_000_000);
77166d51 224print "ok 6\n";
817e2dcb 225
77166d51 226fail unless seek(BIG, 1, $SEEK_CUR);
227print "ok 7\n";
817e2dcb 228
326fd4b6 229# If you get 205_032_705 from here it means that
230# your tell() is returning 32-bit values since (I32)4_500_000_001
231# is exactly 205_032_705.
232offset('tell(BIG)', 4_500_000_001);
77166d51 233print "ok 8\n";
817e2dcb 234
77166d51 235fail unless seek(BIG, -1, $SEEK_CUR);
236print "ok 9\n";
817e2dcb 237
326fd4b6 238offset('tell(BIG)', 4_500_000_000);
77166d51 239print "ok 10\n";
817e2dcb 240
77166d51 241fail unless seek(BIG, -3, $SEEK_END);
242print "ok 11\n";
817e2dcb 243
326fd4b6 244offset('tell(BIG)', 5_000_000_000);
77166d51 245print "ok 12\n";
817e2dcb 246
247my $big;
248
05f8a9f5 249fail unless read(BIG, $big, 3) == 3;
77166d51 250print "ok 13\n";
817e2dcb 251
05f8a9f5 252fail unless $big eq "big";
77166d51 253print "ok 14\n";
254
255# 705_032_704 = (I32)5_000_000_000
326fd4b6 256# See that we don't have "big" in the 705_... spot:
257# that would mean that we have a wraparound.
77166d51 258fail unless seek(BIG, 705_032_704, $SEEK_SET);
259print "ok 15\n";
260
261my $zero;
262
263fail unless read(BIG, $zero, 3) == 3;
264print "ok 16\n";
265
266fail unless $zero eq "\0\0\0";
267print "ok 17\n";
817e2dcb 268
d731b481 269explain() if $fail;
05f8a9f5 270
77166d51 271bye(); # does the necessary cleanup
e9a694fc 272
290be4b1 273END {
b0d0c539 274 # unlink may fail if applied directly to a large file
6c8d78fb 275 # be paranoid about leaving 5 gig files lying around
1c25d394 276 open(BIG, ">$big0"); # truncate
b0d0c539 277 close(BIG);
290be4b1 278}
279
6da84e39 280# eof