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 (c) 1994, by Sun Microsytems, Inc. 24 */ 25 26 #pragma ident "%Z%%M% %I% %E% SMI" 27 28 /* 29 * interfaces to find an executable (from libc code) 30 */ 31 32 /* Copyright (c) 1988 AT&T */ 33 /* All Rights Reserved */ 34 35 36 #include <unistd.h> 37 #include <stdlib.h> 38 #include <string.h> 39 #include <errno.h> 40 #include <limits.h> 41 #include <sys/types.h> 42 #include <sys/stat.h> 43 44 #include "prb_proc_int.h" 45 46 static const char *exec_cat(const char *s1, const char *s2, char *si); 47 48 prb_status_t 49 find_executable(const char *name, char *ret_path) 50 { 51 const char *pathstr; 52 char fname[PATH_MAX + 2]; 53 const char *cp; 54 struct stat stat_buf; 55 56 if (*name == '\0') { 57 return (prb_status_map(ENOENT)); 58 } 59 if ((pathstr = getenv("PATH")) == NULL) { 60 if (geteuid() == 0 || getuid() == 0) 61 pathstr = "/usr/sbin:/usr/bin"; 62 else 63 pathstr = "/usr/bin:"; 64 } 65 cp = strchr(name, '/') ? (const char *) "" : pathstr; 66 67 do { 68 cp = exec_cat(cp, name, fname); 69 if (stat(fname, &stat_buf) != -1) { 70 /* successful find of the file */ 71 (void) strncpy(ret_path, fname, PATH_MAX + 2); 72 return (PRB_STATUS_OK); 73 } 74 } while (cp); 75 76 return (prb_status_map(ENOENT)); 77 } 78 79 80 81 static const char * 82 exec_cat(const char *s1, const char *s2, char *si) 83 { 84 char *s; 85 /* number of characters in s2 */ 86 int cnt = PATH_MAX + 1; 87 88 s = si; 89 while (*s1 && *s1 != ':') { 90 if (cnt > 0) { 91 *s++ = *s1++; 92 cnt--; 93 } else 94 s1++; 95 } 96 if (si != s && cnt > 0) { 97 *s++ = '/'; 98 cnt--; 99 } 100 while (*s2 && cnt > 0) { 101 *s++ = *s2++; 102 cnt--; 103 } 104 *s = '\0'; 105 return (*s1 ? ++s1 : 0); 106 } 107