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, Version 1.0 only 6 * (the "License"). You may not use this file except in compliance 7 * with the License. 8 * 9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10 * or http://www.opensolaris.org/os/licensing. 11 * See the License for the specific language governing permissions 12 * and limitations under the License. 13 * 14 * When distributing Covered Code, include this CDDL HEADER in each 15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16 * If applicable, add the following below this CDDL HEADER, with the 17 * fields enclosed by brackets "[]" replaced with your own identifying 18 * information: Portions Copyright [yyyy] [name of copyright owner] 19 * 20 * CDDL HEADER END 21 */ 22 /* 23 * Copyright 1990 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 <string.h> 30 #include <sys/file.h> 31 #include <sys/syscall.h> 32 33 int 34 execve(char *file, char **argv, char **arge) 35 { 36 char *c; 37 char path[256]; 38 39 if (strncmp(file, "/usr/bin", strlen("/usr/bin")) == 0 || 40 strncmp(file, "/bin", strlen("/bin")) == 0) { 41 if (_syscall(SYS_access, file, F_OK) == -1) { 42 strcpy(path, "/usr/ucb"); 43 strcat(path, strrchr(file, '/')); 44 file = path; 45 } 46 } 47 else if (strncmp(file, "/usr/ucb", strlen("/usr/ucb")) == 0) { 48 strcpy(path, "/usr/bin"); 49 strcat(path, strrchr(file, '/')); 50 if (_syscall(SYS_access, path, F_OK) == 0) 51 file = path; 52 } 53 else if (strncmp(file, "/usr/5bin", strlen("/usr/5bin")) == 0) { 54 strcpy(path, "/usr/bin"); 55 strcat(path, strrchr(file, '/')); 56 if (_syscall(SYS_access, path, F_OK) == 0) 57 file = path; 58 else { 59 strcpy(path, "/usr/ucb"); 60 strcat(path, strrchr(file, '/')); 61 if (_syscall(SYS_access, path, F_OK) == 0) 62 file = path; 63 } 64 } 65 66 return (_syscall(SYS_execve, file, argv, arge)); 67 } 68