1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
|
/* Copyright (C) 2002-2021 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Jakub Jelinek <jakub@redhat.com>, 2002.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<https://www.gnu.org/licenses/>. */
#include <errno.h>
#include <fcntl.h>
#include <pthread.h>
#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <getopt.h>
#include <support/xthread.h>
const char *command;
const char *pidfile;
char pidfilename[] = "/tmp/tst-cancel7-XXXXXX";
static void *
tf (void *arg)
{
const char *args = " --direct --pidfile ";
char *cmd = alloca (strlen (command) + strlen (args)
+ strlen (pidfilename) + 1);
strcpy (stpcpy (stpcpy (cmd, command), args), pidfilename);
system (cmd);
/* This call should never return. */
return NULL;
}
static void
sl (void)
{
FILE *f = fopen (pidfile, "w");
if (f == NULL)
exit (1);
fprintf (f, "%lld\n", (long long) getpid ());
fflush (f);
struct flock fl =
{
.l_type = F_WRLCK,
.l_start = 0,
.l_whence = SEEK_SET,
.l_len = 1
};
if (fcntl (fileno (f), F_SETLK, &fl) != 0)
exit (1);
sigset_t ss;
sigfillset (&ss);
sigsuspend (&ss);
exit (0);
}
static void
do_prepare (int argc, char *argv[])
{
if (command == NULL)
command = argv[0];
if (pidfile)
sl ();
int fd = mkstemp (pidfilename);
if (fd == -1)
{
puts ("mkstemp failed");
exit (1);
}
write (fd, " ", 1);
close (fd);
}
static int
do_test (void)
{
pthread_t th;
if (pthread_create (&th, NULL, tf, NULL) != 0)
{
puts ("pthread_create failed");
return 1;
}
do
sleep (1);
while (access (pidfilename, R_OK) != 0);
xpthread_cancel (th);
void *r = xpthread_join (th);
sleep (1);
FILE *f = fopen (pidfilename, "r+");
if (f == NULL)
{
puts ("no pidfile");
return 1;
}
long long ll;
if (fscanf (f, "%lld\n", &ll) != 1)
{
puts ("could not read pid");
unlink (pidfilename);
return 1;
}
struct flock fl =
{
.l_type = F_WRLCK,
.l_start = 0,
.l_whence = SEEK_SET,
.l_len = 1
};
if (fcntl (fileno (f), F_GETLK, &fl) != 0)
{
puts ("F_GETLK failed");
unlink (pidfilename);
return 1;
}
if (fl.l_type != F_UNLCK)
{
printf ("child %lld still running\n", (long long) fl.l_pid);
if (fl.l_pid == ll)
kill (fl.l_pid, SIGKILL);
unlink (pidfilename);
return 1;
}
fclose (f);
unlink (pidfilename);
return r != PTHREAD_CANCELED;
}
static void
do_cleanup (void)
{
FILE *f = fopen (pidfilename, "r+");
long long ll;
if (f != NULL && fscanf (f, "%lld\n", &ll) == 1)
{
struct flock fl =
{
.l_type = F_WRLCK,
.l_start = 0,
.l_whence = SEEK_SET,
.l_len = 1
};
if (fcntl (fileno (f), F_GETLK, &fl) == 0 && fl.l_type != F_UNLCK
&& fl.l_pid == ll)
kill (fl.l_pid, SIGKILL);
fclose (f);
}
unlink (pidfilename);
}
#define OPT_COMMAND 10000
#define OPT_PIDFILE 10001
#define CMDLINE_OPTIONS \
{ "command", required_argument, NULL, OPT_COMMAND }, \
{ "pidfile", required_argument, NULL, OPT_PIDFILE },
static void
cmdline_process (int c)
{
switch (c)
{
case OPT_COMMAND:
command = optarg;
break;
case OPT_PIDFILE:
pidfile = optarg;
break;
}
}
#define CMDLINE_PROCESS cmdline_process
#define CLEANUP_HANDLER do_cleanup
#define PREPARE do_prepare
#include <support/test-driver.c>
|
