| 1 | #!./perl |
| 2 | |
| 3 | BEGIN { |
| 4 | chdir 't' if -d 't'; |
| 5 | @INC = '../lib'; |
| 6 | require './test.pl'; |
| 7 | } |
| 8 | |
| 9 | plan tests => 48; |
| 10 | |
| 11 | open(I, 'op/sysio.t') || die "sysio.t: cannot find myself: $!"; |
| 12 | |
| 13 | $reopen = ($^O eq 'VMS' || |
| 14 | $^O eq 'os2' || |
| 15 | $^O eq 'MSWin32' || |
| 16 | $^O eq 'NetWare' || |
| 17 | $^O eq 'dos' || |
| 18 | $^O eq 'mpeix'); |
| 19 | |
| 20 | $x = 'abc'; |
| 21 | |
| 22 | # should not be able to do negative lengths |
| 23 | eval { sysread(I, $x, -1) }; |
| 24 | like($@, qr/^Negative length /); |
| 25 | |
| 26 | # $x should be intact |
| 27 | is($x, 'abc'); |
| 28 | |
| 29 | # should not be able to read before the buffer |
| 30 | eval { sysread(I, $x, 1, -4) }; |
| 31 | like($@, qr/^Offset outside string /); |
| 32 | |
| 33 | # $x should be intact |
| 34 | is($x, 'abc'); |
| 35 | |
| 36 | $a ='0123456789'; |
| 37 | |
| 38 | # default offset 0 |
| 39 | is(sysread(I, $a, 3), 3); |
| 40 | |
| 41 | # $a should be as follows |
| 42 | is($a, '#!.'); |
| 43 | |
| 44 | # reading past the buffer should zero pad |
| 45 | is(sysread(I, $a, 2, 5), 2); |
| 46 | |
| 47 | # the zero pad should be seen now |
| 48 | is($a, "#!.\0\0/p"); |
| 49 | |
| 50 | # try changing the last two characters of $a |
| 51 | is(sysread(I, $a, 3, -2), 3); |
| 52 | |
| 53 | # the last two characters of $a should have changed (into three) |
| 54 | is($a, "#!.\0\0erl"); |
| 55 | |
| 56 | $outfile = tempfile(); |
| 57 | |
| 58 | open(O, ">$outfile") || die "sysio.t: cannot write $outfile: $!"; |
| 59 | |
| 60 | select(O); $|=1; select(STDOUT); |
| 61 | |
| 62 | # cannot write negative lengths |
| 63 | eval { syswrite(O, $x, -1) }; |
| 64 | like($@, qr/^Negative length /); |
| 65 | |
| 66 | # $x still intact |
| 67 | is($x, 'abc'); |
| 68 | |
| 69 | # $outfile still intact |
| 70 | ok(!-s $outfile); |
| 71 | |
| 72 | # should not be able to write from after the buffer |
| 73 | eval { syswrite(O, $x, 1, 4) }; |
| 74 | like($@, qr/^Offset outside string /); |
| 75 | |
| 76 | # $x still intact |
| 77 | is($x, 'abc'); |
| 78 | |
| 79 | # but it should be ok to write from the end of the buffer |
| 80 | syswrite(O, $x, 0, 3); |
| 81 | syswrite(O, $x, 1, 3); |
| 82 | |
| 83 | # $outfile still intact |
| 84 | if ($reopen) { # must close file to update EOF marker for stat |
| 85 | close O; open(O, ">>$outfile") || die "sysio.t: cannot write $outfile: $!"; |
| 86 | } |
| 87 | ok(!-s $outfile); |
| 88 | |
| 89 | # should not be able to write from before the buffer |
| 90 | |
| 91 | eval { syswrite(O, $x, 1, -4) }; |
| 92 | like($@, qr/^Offset outside string /); |
| 93 | |
| 94 | # $x still intact |
| 95 | is($x, 'abc'); |
| 96 | |
| 97 | # $outfile still intact |
| 98 | if ($reopen) { # must close file to update EOF marker for stat |
| 99 | close O; open(O, ">>$outfile") || die "sysio.t: cannot write $outfile: $!"; |
| 100 | } |
| 101 | ok(!-s $outfile); |
| 102 | |
| 103 | # [perl #67912] syswrite prints garbage if called with empty scalar and non-zero offset |
| 104 | eval { my $buf = ''; syswrite(O, $buf, 1, 1) }; |
| 105 | like($@, qr/^Offset outside string /); |
| 106 | |
| 107 | # $x still intact |
| 108 | is($x, 'abc'); |
| 109 | |
| 110 | # $outfile still intact |
| 111 | if ($reopen) { # must close file to update EOF marker for stat |
| 112 | close O; open(O, ">>$outfile") || die "sysio.t: cannot write $outfile: $!"; |
| 113 | } |
| 114 | ok(!-s $outfile); |
| 115 | |
| 116 | eval { my $buf = 'x'; syswrite(O, $buf, 1, 2) }; |
| 117 | like($@, qr/^Offset outside string /); |
| 118 | |
| 119 | # $x still intact |
| 120 | is($x, 'abc'); |
| 121 | |
| 122 | # $outfile still intact |
| 123 | if ($reopen) { # must close file to update EOF marker for stat |
| 124 | close O; open(O, ">>$outfile") || die "sysio.t: cannot write $outfile: $!"; |
| 125 | } |
| 126 | ok(!-s $outfile); |
| 127 | |
| 128 | # default offset 0 |
| 129 | if (syswrite(O, $a, 2) == 2){ |
| 130 | pass(); |
| 131 | } else { |
| 132 | diag($!); |
| 133 | fail(); |
| 134 | # most other tests make no sense after e.g. "No space left on device" |
| 135 | die $!; |
| 136 | } |
| 137 | |
| 138 | |
| 139 | # $a still intact |
| 140 | is($a, "#!.\0\0erl"); |
| 141 | |
| 142 | # $outfile should have grown now |
| 143 | if ($reopen) { # must close file to update EOF marker for stat |
| 144 | close O; open(O, ">>$outfile") || die "sysio.t: cannot write $outfile: $!"; |
| 145 | } |
| 146 | is(-s $outfile, 2); |
| 147 | |
| 148 | # with offset |
| 149 | is(syswrite(O, $a, 2, 5), 2); |
| 150 | |
| 151 | # $a still intact |
| 152 | is($a, "#!.\0\0erl"); |
| 153 | |
| 154 | # $outfile should have grown now |
| 155 | if ($reopen) { # must close file to update EOF marker for stat |
| 156 | close O; open(O, ">>$outfile") || die "sysio.t: cannot write $outfile: $!"; |
| 157 | } |
| 158 | is(-s $outfile, 4); |
| 159 | |
| 160 | # with negative offset and a bit too much length |
| 161 | is(syswrite(O, $a, 5, -3), 3); |
| 162 | |
| 163 | # $a still intact |
| 164 | is($a, "#!.\0\0erl"); |
| 165 | |
| 166 | # $outfile should have grown now |
| 167 | if ($reopen) { # must close file to update EOF marker for stat |
| 168 | close O; open(O, ">>$outfile") || die "sysio.t: cannot write $outfile: $!"; |
| 169 | } |
| 170 | is(-s $outfile, 7); |
| 171 | |
| 172 | # with implicit length argument |
| 173 | is(syswrite(O, $x), 3); |
| 174 | |
| 175 | # $a still intact |
| 176 | is($x, "abc"); |
| 177 | |
| 178 | # $outfile should have grown now |
| 179 | if ($reopen) { # must close file to update EOF marker for stat |
| 180 | close O; open(O, ">>$outfile") || die "sysio.t: cannot write $outfile: $!"; |
| 181 | } |
| 182 | is(-s $outfile, 10); |
| 183 | |
| 184 | close(O); |
| 185 | |
| 186 | open(I, $outfile) || die "sysio.t: cannot read $outfile: $!"; |
| 187 | |
| 188 | $b = 'xyz'; |
| 189 | |
| 190 | # reading too much only return as much as available |
| 191 | is(sysread(I, $b, 100), 10); |
| 192 | |
| 193 | # this we should have |
| 194 | is($b, '#!ererlabc'); |
| 195 | |
| 196 | # test sysseek |
| 197 | |
| 198 | is(sysseek(I, 2, 0), 2); |
| 199 | sysread(I, $b, 3); |
| 200 | is($b, 'ere'); |
| 201 | |
| 202 | is(sysseek(I, -2, 1), 3); |
| 203 | sysread(I, $b, 4); |
| 204 | is($b, 'rerl'); |
| 205 | |
| 206 | ok(sysseek(I, 0, 0) eq '0 but true'); |
| 207 | |
| 208 | ok(not defined sysseek(I, -1, 1)); |
| 209 | |
| 210 | close(I); |
| 211 | |
| 212 | unlink_all $outfile; |
| 213 | |
| 214 | # Check that utf8 IO doesn't upgrade the scalar |
| 215 | open(I, ">$outfile") || die "sysio.t: cannot write $outfile: $!"; |
| 216 | # Will skip harmlessly on stdioperl |
| 217 | eval {binmode STDOUT, ":utf8"}; |
| 218 | die $@ if $@ and $@ !~ /^IO layers \(like ':utf8'\) unavailable/; |
| 219 | |
| 220 | # y diaresis is \w when UTF8 |
| 221 | $a = chr 255; |
| 222 | |
| 223 | unlike($a, qr/\w/); |
| 224 | |
| 225 | syswrite I, $a; |
| 226 | |
| 227 | # Should not be upgraded as a side effect of syswrite. |
| 228 | unlike($a, qr/\w/); |
| 229 | |
| 230 | # This should work |
| 231 | eval {syswrite I, 2;}; |
| 232 | is($@, ''); |
| 233 | |
| 234 | close(I); |
| 235 | unlink_all $outfile; |
| 236 | |
| 237 | chdir('..'); |
| 238 | |
| 239 | 1; |
| 240 | |
| 241 | # eof |