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 a child grabs an exclusive lock and calls exit, we can grab it 18 * again. 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 <errno.h> 29 #include <sys/wait.h> 30 31 #include <sys/usb/clients/ccid/uccid.h> 32 33 int 34 main(int argc, char *argv[]) 35 { 36 int fd, estat; 37 pid_t pid; 38 uccid_cmd_txn_begin_t begin; 39 40 if (argc != 2) { 41 errx(EXIT_FAILURE, "missing required ccid path"); 42 } 43 44 bzero(&begin, sizeof (begin)); 45 begin.uct_version = UCCID_CURRENT_VERSION; 46 47 pid = fork(); 48 if (pid == 0) { 49 fd = open(argv[1], O_RDWR); 50 if (fd < 0) { 51 err(EXIT_FAILURE, "failed to open %s", argv[1]); 52 } 53 54 if (ioctl(fd, UCCID_CMD_TXN_BEGIN, &begin) != 0) { 55 err(EXIT_FAILURE, "failed to issue begin ioctl"); 56 } 57 58 _exit(0); 59 } 60 61 estat = -1; 62 if (waitpid(pid, &estat, 0) == -1) { 63 err(EXIT_FAILURE, "failed to wait for pid %d", pid); 64 } 65 66 if (estat != 0) { 67 errx(EXIT_FAILURE, "child exited with non-zero value (%d)", 68 estat); 69 } 70 71 fd = open(argv[1], O_RDWR); 72 if (fd < 0) { 73 err(EXIT_FAILURE, "failed to open %s", argv[1]); 74 } 75 76 if (ioctl(fd, UCCID_CMD_TXN_BEGIN, &begin) != 0) { 77 err(EXIT_FAILURE, "failed to issue begin ioctl"); 78 } 79 80 return (0); 81 } 82