1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License (the "License"). 6 * You may not use this file except in compliance with the License. 7 * 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9 * or http://www.opensolaris.org/os/licensing. 10 * See the License for the specific language governing permissions 11 * and limitations under the License. 12 * 13 * When distributing Covered Code, include this CDDL HEADER in each 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15 * If applicable, add the following below this CDDL HEADER, with the 16 * fields enclosed by brackets "[]" replaced with your own identifying 17 * information: Portions Copyright [yyyy] [name of copyright owner] 18 * 19 * CDDL HEADER END 20 */ 21 22 /* 23 * Copyright 2008 Sun Microsystems, Inc. All rights reserved. 24 * Use is subject to license terms. 25 */ 26 27 /* Copyright (c) 1988 AT&T */ 28 /* All Rights Reserved */ 29 30 /* 31 * Return the number of the slot in the utmp file 32 * corresponding to the current user: try for file 0, 1, 2. 33 * Returns -1 if slot not found. 34 */ 35 36 #include "lint.h" 37 #include <string.h> 38 #include <stdio.h> 39 #include <sys/types.h> 40 #include <sys/stat.h> 41 #include <unistd.h> 42 #include <utmpx.h> 43 #include <stdlib.h> 44 #include <pthread.h> 45 46 #ifndef TRUE 47 #define TRUE 1 48 #define FALSE 0 49 #endif 50 51 int 52 ttyslot(void) 53 { 54 struct futmpx ubuf; 55 char *p; 56 int s; 57 int ret = -1; 58 int console = FALSE; 59 char ttynm[128]; 60 FILE *fp; 61 int cancel_state; 62 63 /* 64 * The UNIX98 Posix conformance test suite requires 65 * ttyslot() to not be a cancellation point. 66 */ 67 (void) pthread_setcancelstate(PTHREAD_CANCEL_DISABLE, &cancel_state); 68 69 if ((p = ttyname_r(0, ttynm, 128)) != NULL || 70 (p = ttyname_r(1, ttynm, 128)) != NULL || 71 (p = ttyname_r(2, ttynm, 128)) != NULL) { 72 if (strncmp(p, "/dev/", 5) == 0) 73 p += 5; 74 if (strcmp(p, "console") == 0) 75 console = TRUE; 76 s = 0; 77 if ((fp = fopen(UTMPX_FILE, "rF")) != NULL) { 78 while ((fread(&ubuf, sizeof (ubuf), 1, fp)) == 1) { 79 if ((ubuf.ut_type == INIT_PROCESS || 80 ubuf.ut_type == LOGIN_PROCESS || 81 ubuf.ut_type == USER_PROCESS) && 82 strncmp(p, ubuf.ut_line, 83 sizeof (ubuf.ut_line)) == 0) { 84 ret = s; 85 if (!console || 86 strncmp(ubuf.ut_host, ":0", 2) == 0) 87 break; 88 } 89 s++; 90 } 91 (void) fclose(fp); 92 } 93 } 94 95 (void) pthread_setcancelstate(cancel_state, NULL); 96 return (ret); 97 } 98