1 /*
2 * This file and its contents are supplied under the terms of the
3 * Common Development and Distribution License ("CDDL"), version 1.0.
4 * You may only use this file in accordance with the terms of version
5 * 1.0 of the CDDL.
6 *
7 * A full copy of the text of the CDDL should have accompanied this
8 * source. A copy of the CDDL is also available via the Internet at
9 * http://www.illumos.org/license/CDDL.
10 */
11
12 /*
13 * Copyright 2019, Joyent, Inc.
14 */
15
16 /*
17 * Verify that if we've grabbed an exclusive lock, another thread fails to grab
18 * it as a non-blocking lock.
19 */
20
21 #include <err.h>
22 #include <stdlib.h>
23 #include <sys/types.h>
24 #include <sys/stat.h>
25 #include <fcntl.h>
26 #include <strings.h>
27 #include <unistd.h>
28 #include <sys/debug.h>
29 #include <thread.h>
30 #include <errno.h>
31
32 #include <sys/usb/clients/ccid/uccid.h>
33
34 void *
nonblock_thread(void * arg)35 nonblock_thread(void *arg)
36 {
37 uccid_cmd_txn_begin_t begin;
38 int ret;
39 int fd = (uintptr_t)arg;
40
41
42 bzero(&begin, sizeof (begin));
43
44 begin.uct_version = UCCID_CURRENT_VERSION;
45 begin.uct_flags = UCCID_TXN_DONT_BLOCK;
46
47 ret = ioctl(fd, UCCID_CMD_TXN_BEGIN, &begin);
48 VERIFY3S(ret, ==, -1);
49 VERIFY3S(errno, ==, EBUSY);
50
51 return (NULL);
52 }
53
54 int
main(int argc,char * argv[])55 main(int argc, char *argv[])
56 {
57 int fda, fdb;
58 uccid_cmd_txn_begin_t begin;
59 uccid_cmd_txn_end_t end;
60 thread_t thr;
61
62 if (argc != 2) {
63 errx(EXIT_FAILURE, "missing required ccid path");
64 }
65
66 if ((fda = open(argv[1], O_RDWR)) < 0) {
67 err(EXIT_FAILURE, "failed to open %s", argv[1]);
68 }
69
70 if ((fdb = open(argv[1], O_RDWR)) < 0) {
71 err(EXIT_FAILURE, "failed to open %s", argv[1]);
72 }
73
74 bzero(&begin, sizeof (begin));
75 bzero(&end, sizeof (end));
76
77 begin.uct_version = UCCID_CURRENT_VERSION;
78 end.uct_version = UCCID_CURRENT_VERSION;
79 end.uct_flags = UCCID_TXN_END_RELEASE;
80
81 if (ioctl(fda, UCCID_CMD_TXN_BEGIN, &begin) != 0) {
82 err(EXIT_FAILURE, "failed to issue begin ioctl");
83 }
84
85 if (thr_create(NULL, 0, nonblock_thread, (void *)(uintptr_t)fdb, 0,
86 &thr) != 0) {
87 err(EXIT_FAILURE, "failed to create thread");
88 }
89
90 if (thr_join(thr, NULL, NULL) != 0) {
91 err(EXIT_FAILURE, "failed to join therad");
92 }
93
94 if (ioctl(fda, UCCID_CMD_TXN_END, &end) != 0) {
95 err(EXIT_FAILURE, "failed to issue end ioctl");
96 }
97
98 return (0);
99 }
100