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 * 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 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