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 #include <sys/types.h> 28 #include <errno.h> 29 #include <fcntl.h> 30 #include <limits.h> 31 #include <signal.h> 32 #include <stdio.h> 33 #include <stdio_ext.h> 34 #include <stdlib.h> 35 #include <string.h> 36 #include <unistd.h> 37 38 #define _FILE_FD_MAX 255 39 40 /* 41 * This 32-bit only preloadable library enables extended fd FILE's. 42 */ 43 44 #pragma init(init_STDIO_bad_fd) 45 46 void 47 init_STDIO_bad_fd(void) 48 { 49 int action = -1; /* default signal */ 50 int closed_fd = -1; /* default fd */ 51 char *ptr; 52 int signal; 53 int retval; 54 55 /* 56 * user specified badfd 57 */ 58 if ((ptr = getenv("_STDIO_BADFD")) != NULL) { 59 closed_fd = atoi(ptr); 60 if (closed_fd < 3 || closed_fd > _FILE_FD_MAX) { 61 (void) fprintf(stderr, "File descriptor must be" 62 " in the range 3-%d inclusive.\n", _FILE_FD_MAX); 63 exit(1); 64 } 65 } 66 67 /* 68 * user specified action 69 */ 70 if ((ptr = getenv("_STDIO_BADFD_SIGNAL")) != NULL) { 71 /* accept numbers or symbolic names */ 72 if (strncmp(ptr, "SIG", 3) == 0) /* begins with "SIG"? */ 73 ptr = ptr + 3; 74 retval = str2sig(ptr, &signal); 75 if (retval == -1) { 76 (void) fprintf(stderr, 77 "Invalid signal name or number.\n"); 78 exit(1); 79 } 80 action = signal; 81 } 82 83 if ((closed_fd = enable_extended_FILE_stdio(closed_fd, action)) == -1) { 84 perror("enable_extended_FILE_stdio(3C)"); 85 exit(1); 86 } 87 } 88