17c478bd9Sstevel@tonic-gate /* 27c478bd9Sstevel@tonic-gate * CDDL HEADER START 37c478bd9Sstevel@tonic-gate * 47c478bd9Sstevel@tonic-gate * The contents of this file are subject to the terms of the 57c478bd9Sstevel@tonic-gate * Common Development and Distribution License, Version 1.0 only 67c478bd9Sstevel@tonic-gate * (the "License"). You may not use this file except in compliance 77c478bd9Sstevel@tonic-gate * with the License. 87c478bd9Sstevel@tonic-gate * 97c478bd9Sstevel@tonic-gate * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 107c478bd9Sstevel@tonic-gate * or http://www.opensolaris.org/os/licensing. 117c478bd9Sstevel@tonic-gate * See the License for the specific language governing permissions 127c478bd9Sstevel@tonic-gate * and limitations under the License. 137c478bd9Sstevel@tonic-gate * 147c478bd9Sstevel@tonic-gate * When distributing Covered Code, include this CDDL HEADER in each 157c478bd9Sstevel@tonic-gate * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 167c478bd9Sstevel@tonic-gate * If applicable, add the following below this CDDL HEADER, with the 177c478bd9Sstevel@tonic-gate * fields enclosed by brackets "[]" replaced with your own identifying 187c478bd9Sstevel@tonic-gate * information: Portions Copyright [yyyy] [name of copyright owner] 197c478bd9Sstevel@tonic-gate * 207c478bd9Sstevel@tonic-gate * CDDL HEADER END 217c478bd9Sstevel@tonic-gate */ 227c478bd9Sstevel@tonic-gate /* 23*5d54f3d8Smuffin * Copyright 2005 Sun Microsystems, Inc. All rights reserved. 247c478bd9Sstevel@tonic-gate * Use is subject to license terms. 257c478bd9Sstevel@tonic-gate */ 267c478bd9Sstevel@tonic-gate 277c478bd9Sstevel@tonic-gate /* Copyright (c) 1984 AT&T */ 287c478bd9Sstevel@tonic-gate /* All Rights Reserved */ 297c478bd9Sstevel@tonic-gate 30*5d54f3d8Smuffin #pragma ident "%Z%%M% %I% %E% SMI" 317c478bd9Sstevel@tonic-gate 327c478bd9Sstevel@tonic-gate /*LINTLIBRARY*/ 337c478bd9Sstevel@tonic-gate /* 347c478bd9Sstevel@tonic-gate * execlp(name, arg,...,0) (like execl, but does path search) 357c478bd9Sstevel@tonic-gate * execvp(name, argv) (like execv, but does path search) 367c478bd9Sstevel@tonic-gate */ 37*5d54f3d8Smuffin #include <errno.h> 387c478bd9Sstevel@tonic-gate #include <sys/param.h> 39*5d54f3d8Smuffin #include <stdarg.h> 40*5d54f3d8Smuffin #include <string.h> 41*5d54f3d8Smuffin #include <stdlib.h> 42*5d54f3d8Smuffin #include <unistd.h> 437c478bd9Sstevel@tonic-gate 44*5d54f3d8Smuffin static char *execat(char *, char *, char *); 457c478bd9Sstevel@tonic-gate static char *shell = "/bin/sh"; 467c478bd9Sstevel@tonic-gate 477c478bd9Sstevel@tonic-gate int 48*5d54f3d8Smuffin execlp(char *name, ...) 497c478bd9Sstevel@tonic-gate { 507c478bd9Sstevel@tonic-gate va_list args; 51*5d54f3d8Smuffin int r; 527c478bd9Sstevel@tonic-gate 53*5d54f3d8Smuffin va_start(args, name); 54*5d54f3d8Smuffin r = execvp(name, (char **)args); 55*5d54f3d8Smuffin va_end(args); 56*5d54f3d8Smuffin 57*5d54f3d8Smuffin return (r); 587c478bd9Sstevel@tonic-gate } 597c478bd9Sstevel@tonic-gate 607c478bd9Sstevel@tonic-gate int 61*5d54f3d8Smuffin execvp(char *name, char **argv) 627c478bd9Sstevel@tonic-gate { 637c478bd9Sstevel@tonic-gate char *pathstr; 647c478bd9Sstevel@tonic-gate char fname[MAXPATHLEN]; 657c478bd9Sstevel@tonic-gate char *newargs[256]; 667c478bd9Sstevel@tonic-gate int i; 67*5d54f3d8Smuffin char *cp; 68*5d54f3d8Smuffin unsigned etxtbsy = 1; 69*5d54f3d8Smuffin int eacces = 0; 707c478bd9Sstevel@tonic-gate 717c478bd9Sstevel@tonic-gate if ((pathstr = getenv("PATH")) == NULL) 727c478bd9Sstevel@tonic-gate pathstr = ":/usr/ucb:/bin:/usr/bin"; 737c478bd9Sstevel@tonic-gate cp = strchr(name, '/') ? "": pathstr; 747c478bd9Sstevel@tonic-gate 757c478bd9Sstevel@tonic-gate do { 767c478bd9Sstevel@tonic-gate cp = execat(cp, name, fname); 777c478bd9Sstevel@tonic-gate retry: 787c478bd9Sstevel@tonic-gate (void) execv(fname, argv); 797c478bd9Sstevel@tonic-gate switch (errno) { 807c478bd9Sstevel@tonic-gate case ENOEXEC: 817c478bd9Sstevel@tonic-gate newargs[0] = "sh"; 827c478bd9Sstevel@tonic-gate newargs[1] = fname; 83*5d54f3d8Smuffin for (i = 1; (newargs[i+1] = argv[i]) != NULL; ++i) { 847c478bd9Sstevel@tonic-gate if (i >= 254) { 857c478bd9Sstevel@tonic-gate errno = E2BIG; 867c478bd9Sstevel@tonic-gate return(-1); 877c478bd9Sstevel@tonic-gate } 887c478bd9Sstevel@tonic-gate } 897c478bd9Sstevel@tonic-gate (void) execv(shell, newargs); 907c478bd9Sstevel@tonic-gate return (-1); 917c478bd9Sstevel@tonic-gate case ETXTBSY: 927c478bd9Sstevel@tonic-gate if (++etxtbsy > 5) 937c478bd9Sstevel@tonic-gate return (-1); 947c478bd9Sstevel@tonic-gate (void) sleep(etxtbsy); 957c478bd9Sstevel@tonic-gate goto retry; 967c478bd9Sstevel@tonic-gate case EACCES: 977c478bd9Sstevel@tonic-gate ++eacces; 987c478bd9Sstevel@tonic-gate break; 997c478bd9Sstevel@tonic-gate case ENOMEM: 1007c478bd9Sstevel@tonic-gate case E2BIG: 1017c478bd9Sstevel@tonic-gate case EFAULT: 1027c478bd9Sstevel@tonic-gate return (-1); 1037c478bd9Sstevel@tonic-gate } 1047c478bd9Sstevel@tonic-gate } while (cp); 1057c478bd9Sstevel@tonic-gate if (eacces) 1067c478bd9Sstevel@tonic-gate errno = EACCES; 1077c478bd9Sstevel@tonic-gate return (-1); 1087c478bd9Sstevel@tonic-gate } 1097c478bd9Sstevel@tonic-gate 1107c478bd9Sstevel@tonic-gate static char * 111*5d54f3d8Smuffin execat(char *s1, char *s2, char *si) 1127c478bd9Sstevel@tonic-gate { 113*5d54f3d8Smuffin char *s; 1147c478bd9Sstevel@tonic-gate char *end; 1157c478bd9Sstevel@tonic-gate 1167c478bd9Sstevel@tonic-gate s = si; 1177c478bd9Sstevel@tonic-gate end = s + MAXPATHLEN; 1187c478bd9Sstevel@tonic-gate while (*s1 && *s1 != ':' && s < end) 1197c478bd9Sstevel@tonic-gate *s++ = *s1++; 1207c478bd9Sstevel@tonic-gate if (si != s && s < end) 1217c478bd9Sstevel@tonic-gate *s++ = '/'; 1227c478bd9Sstevel@tonic-gate while (*s2 && s < end) 1237c478bd9Sstevel@tonic-gate *s++ = *s2++; 1247c478bd9Sstevel@tonic-gate *s = '\0'; 1257c478bd9Sstevel@tonic-gate return (*s1 ? ++s1: 0); 1267c478bd9Sstevel@tonic-gate } 127