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1 | #!/usr/bin/perl | |
2 | ||
3 | use lib '../src'; | |
4 | use strict; | |
5 | use warnings; | |
6 | ||
7 | use Socket; | |
8 | use POSIX (); # don't import assert() | |
9 | ||
10 | use PVE::Tools 'lock_file_full'; | |
11 | ||
12 | my $name = "test.lockfile.$$-"; | |
13 | ||
14 | END { | |
15 | system("rm $name*"); | |
16 | }; | |
17 | ||
18 | # Utilities: | |
19 | ||
20 | sub forked($$) { | |
21 | my ($code1, $code2) = @_; | |
22 | ||
23 | pipe(my $except_r, my $except_w) or die "pipe: $!\n"; | |
24 | ||
25 | my $pid = fork(); | |
26 | die "fork failed: $!\n" if !defined($pid); | |
27 | ||
28 | if ($pid == 0) { | |
29 | close($except_r); | |
30 | eval { $code1->() }; | |
31 | if ($@) { | |
32 | print {$except_w} $@; | |
33 | $except_w->flush(); | |
34 | POSIX::_exit(1); | |
35 | } | |
36 | POSIX::_exit(0); | |
37 | } | |
38 | close($except_w); | |
39 | ||
40 | eval { $code2->() }; | |
41 | my $err = $@; | |
42 | if ($err) { | |
43 | kill(15, $pid); | |
44 | } else { | |
45 | my $err = do { local $/ = undef; <$except_r> }; | |
46 | } | |
47 | die "interrupted\n" if waitpid($pid, 0) != $pid; | |
48 | die $err if $err; | |
49 | ||
50 | # Check exit code: | |
51 | my $status = POSIX::WEXITSTATUS($?); | |
52 | if ($? == -1) { | |
53 | die "failed to execute\n"; | |
54 | } elsif (POSIX::WIFSIGNALED($?)) { | |
55 | my $sig = POSIX::WTERMSIG($?); | |
56 | die "got signal $sig\n"; | |
57 | } elsif ($status != 0) { | |
58 | die "exit code $status\n"; | |
59 | } | |
60 | } | |
61 | ||
62 | # Book-keeping: | |
63 | ||
64 | my %_ran; | |
65 | sub new { | |
66 | %_ran = (); | |
67 | } | |
68 | sub ran { | |
69 | my ($what) = @_; | |
70 | $_ran{$what} = 1; | |
71 | } | |
72 | sub assert { | |
73 | my ($what) = @_; | |
74 | die "code didn't run: $what\n" if !$_ran{$what}; | |
75 | } | |
76 | sub assert_not { | |
77 | my ($what) = @_; | |
78 | die "code shouldn't have run: $what\n" if $_ran{$what}; | |
79 | } | |
80 | ||
81 | # Regular lock: | |
82 | new(); | |
83 | lock_file_full($name, 10, 0, sub { ran('single lock') }); | |
84 | assert('single lock'); | |
85 | ||
86 | # Lock multiple times in a row: | |
87 | new(); | |
88 | lock_file_full($name, 10, 0, sub { ran('lock A') }); | |
89 | assert('lock A'); | |
90 | lock_file_full($name, 10, 0, sub { ran('lock B') }); | |
91 | assert('lock B'); | |
92 | ||
93 | # Nested lock: | |
94 | new(); | |
95 | lock_file_full($name, 10, 0, sub { | |
96 | ran('lock A'); | |
97 | lock_file_full($name, 10, 0, sub { ran('lock B') }); | |
98 | assert('lock B'); | |
99 | ran('lock C'); | |
100 | }); | |
101 | assert('lock A'); | |
102 | assert('lock B'); | |
103 | assert('lock C'); | |
104 | ||
105 | # Independent locks: | |
106 | new(); | |
107 | lock_file_full($name, 10, 0, sub { | |
108 | ran('lock A'); | |
109 | # locks file "${name}2" | |
110 | lock_file_full($name.2, 10, 0, sub { ran('lock B') }); | |
111 | assert('lock B'); | |
112 | ran('lock C'); | |
113 | }); | |
114 | assert('lock A'); | |
115 | assert('lock B'); | |
116 | assert('lock C'); | |
117 | ||
118 | # Does it actually lock? (shared=0) | |
119 | # Can we get two simultaneous shared locks? (shared=1) | |
120 | sub forktest1($) { | |
121 | my ($shared) = @_; | |
122 | new(); | |
123 | # socket pair for synchronization | |
124 | socketpair(my $fmain, my $fother, AF_UNIX, SOCK_STREAM, PF_UNSPEC) | |
125 | or die "socketpair(): $!\n"; | |
126 | forked sub { | |
127 | # other side | |
128 | close($fmain); | |
129 | my $line; | |
130 | lock_file_full($name, 60, $shared, sub { | |
131 | ran('other side'); | |
132 | # tell parent we've acquired the lock | |
133 | print {$fother} "1\n"; | |
134 | $fother->flush(); | |
135 | # wait for parent to be done trying to lock | |
136 | $line = <$fother>; | |
137 | }); | |
138 | die $@ if $@; | |
139 | die "parent failed\n" if !$line || $line ne "2\n"; | |
140 | assert('other side'); | |
141 | }, sub { | |
142 | # main process | |
143 | # Wait for our child to lock: | |
144 | close($fother); | |
145 | my $line = <$fmain>; | |
146 | die "child failed to acquire a lock\n" if !$line || $line ne "1\n"; | |
147 | lock_file_full($name, 1, $shared, sub { | |
148 | ran('local side'); | |
149 | }); | |
150 | if ($shared) { | |
151 | assert('local side'); | |
152 | } else { | |
153 | assert_not('local side'); | |
154 | } | |
155 | print {$fmain} "2\n"; | |
156 | $fmain->flush(); | |
157 | }; | |
158 | close($fmain); | |
159 | } | |
160 | forktest1(0); | |
161 | forktest1(1); | |
162 | print "Ok\n"; # Line-terminate the 'trying to acquire lock' message(s) |