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 #pragma ident "%Z%%M% %I% %E% SMI" 28 29 /* Copyright (c) 1988 AT&T */ 30 /* All Rights Reserved */ 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 #pragma weak ttyslot = _ttyslot 39 40 #include "synonyms.h" 41 #include <string.h> 42 #include <stdio.h> 43 #include <sys/types.h> 44 #include <sys/stat.h> 45 #include <unistd.h> 46 #include <utmpx.h> 47 #include <stdlib.h> 48 #include <pthread.h> 49 50 #ifndef TRUE 51 #define TRUE 1 52 #define FALSE 0 53 #endif 54 55 int 56 ttyslot(void) 57 { 58 struct futmpx ubuf; 59 char *p; 60 int s; 61 int ret = -1; 62 int console = FALSE; 63 char ttynm[128]; 64 FILE *fp; 65 int cancel_state; 66 67 /* 68 * The UNIX98 Posix conformance test suite requires 69 * ttyslot() to not be a cancellation point. 70 */ 71 (void) pthread_setcancelstate(PTHREAD_CANCEL_DISABLE, &cancel_state); 72 73 if ((p = ttyname_r(0, ttynm, 128)) != NULL || 74 (p = ttyname_r(1, ttynm, 128)) != NULL || 75 (p = ttyname_r(2, ttynm, 128)) != NULL) { 76 if (strncmp(p, "/dev/", 5) == 0) 77 p += 5; 78 if (strcmp(p, "console") == 0) 79 console = TRUE; 80 s = 0; 81 if ((fp = fopen(UTMPX_FILE, "rF")) != NULL) { 82 while ((fread(&ubuf, sizeof (ubuf), 1, fp)) == 1) { 83 if ((ubuf.ut_type == INIT_PROCESS || 84 ubuf.ut_type == LOGIN_PROCESS || 85 ubuf.ut_type == USER_PROCESS) && 86 strncmp(p, ubuf.ut_line, 87 sizeof (ubuf.ut_line)) == 0) { 88 ret = s; 89 if (!console || 90 strncmp(ubuf.ut_host, ":0", 2) == 0) 91 break; 92 } 93 s++; 94 } 95 (void) fclose(fp); 96 } 97 } 98 99 (void) pthread_setcancelstate(cancel_state, NULL); 100 return (ret); 101 } 102