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 2006 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 #include "c_synonyms.h" 30 #include <sys/types.h> 31 #include <errno.h> 32 #include <fcntl.h> 33 #include <limits.h> 34 #include <signal.h> 35 #include <stdio.h> 36 #include <stdio_ext.h> 37 #include <stdlib.h> 38 #include <string.h> 39 #include <unistd.h> 40 41 #define _FILE_FD_MAX 255 42 43 /* 44 * This 32-bit only preloadable library enables extended fd FILE's. 45 */ 46 47 #pragma init(init_STDIO_bad_fd) 48 49 void 50 init_STDIO_bad_fd(void) 51 { 52 int action = -1; /* default signal */ 53 int closed_fd = -1; /* default fd */ 54 char *ptr; 55 int signal; 56 int retval; 57 58 /* 59 * user specified badfd 60 */ 61 if ((ptr = getenv("_STDIO_BADFD")) != NULL) { 62 closed_fd = atoi(ptr); 63 if (closed_fd < 3 || closed_fd > _FILE_FD_MAX) { 64 (void) fprintf(stderr, "File descriptor must be" 65 " in the range 3-%d inclusive.\n", _FILE_FD_MAX); 66 exit(1); 67 } 68 } 69 70 /* 71 * user specified action 72 */ 73 if ((ptr = getenv("_STDIO_BADFD_SIGNAL")) != NULL) { 74 /* accept numbers or symbolic names */ 75 if (strncmp(ptr, "SIG", 3) == 0) /* begins with "SIG"? */ 76 ptr = ptr + 3; 77 retval = str2sig(ptr, &signal); 78 if (retval == -1) { 79 (void) fprintf(stderr, 80 "Invalid signal name or number.\n"); 81 exit(1); 82 } 83 action = signal; 84 } 85 86 if ((closed_fd = enable_extended_FILE_stdio(closed_fd, action)) == -1) { 87 perror("enable_extended_FILE_stdio(3C)"); 88 exit(1); 89 } 90 } 91