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 #pragma ident "%Z%%M% %I% %E% SMI" 31 32 /* 33 * Return the number of the slot in the utmp file 34 * corresponding to the current user: try for file 0, 1, 2. 35 * Returns -1 if slot not found. 36 */ 37 38 #include "lint.h" 39 #include <string.h> 40 #include <stdio.h> 41 #include <sys/types.h> 42 #include <sys/stat.h> 43 #include <unistd.h> 44 #include <utmpx.h> 45 #include <stdlib.h> 46 #include <pthread.h> 47 48 #ifndef TRUE 49 #define TRUE 1 50 #define FALSE 0 51 #endif 52 53 int 54 ttyslot(void) 55 { 56 struct futmpx ubuf; 57 char *p; 58 int s; 59 int ret = -1; 60 int console = FALSE; 61 char ttynm[128]; 62 FILE *fp; 63 int cancel_state; 64 65 /* 66 * The UNIX98 Posix conformance test suite requires 67 * ttyslot() to not be a cancellation point. 68 */ 69 (void) pthread_setcancelstate(PTHREAD_CANCEL_DISABLE, &cancel_state); 70 71 if ((p = ttyname_r(0, ttynm, 128)) != NULL || 72 (p = ttyname_r(1, ttynm, 128)) != NULL || 73 (p = ttyname_r(2, ttynm, 128)) != NULL) { 74 if (strncmp(p, "/dev/", 5) == 0) 75 p += 5; 76 if (strcmp(p, "console") == 0) 77 console = TRUE; 78 s = 0; 79 if ((fp = fopen(UTMPX_FILE, "rF")) != NULL) { 80 while ((fread(&ubuf, sizeof (ubuf), 1, fp)) == 1) { 81 if ((ubuf.ut_type == INIT_PROCESS || 82 ubuf.ut_type == LOGIN_PROCESS || 83 ubuf.ut_type == USER_PROCESS) && 84 strncmp(p, ubuf.ut_line, 85 sizeof (ubuf.ut_line)) == 0) { 86 ret = s; 87 if (!console || 88 strncmp(ubuf.ut_host, ":0", 2) == 0) 89 break; 90 } 91 s++; 92 } 93 (void) fclose(fp); 94 } 95 } 96 97 (void) pthread_setcancelstate(cancel_state, NULL); 98 return (ret); 99 } 100