exec/shbin/shbin.c

7c2fbfb345896881c631598ee3852ce9ce33fb07April Chin/*
7c2fbfb345896881c631598ee3852ce9ce33fb07April Chin * CDDL HEADER START
7c2fbfb345896881c631598ee3852ce9ce33fb07April Chin *
7c2fbfb345896881c631598ee3852ce9ce33fb07April Chin * The contents of this file are subject to the terms of the
7c2fbfb345896881c631598ee3852ce9ce33fb07April Chin * Common Development and Distribution License (the "License").
7c2fbfb345896881c631598ee3852ce9ce33fb07April Chin * You may not use this file except in compliance with the License.
7c2fbfb345896881c631598ee3852ce9ce33fb07April Chin *
7c2fbfb345896881c631598ee3852ce9ce33fb07April Chin * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
7c2fbfb345896881c631598ee3852ce9ce33fb07April Chin * or http://www.opensolaris.org/os/licensing.
7c2fbfb345896881c631598ee3852ce9ce33fb07April Chin * See the License for the specific language governing permissions
7c2fbfb345896881c631598ee3852ce9ce33fb07April Chin * and limitations under the License.
7c2fbfb345896881c631598ee3852ce9ce33fb07April Chin *
7c2fbfb345896881c631598ee3852ce9ce33fb07April Chin * When distributing Covered Code, include this CDDL HEADER in each
7c2fbfb345896881c631598ee3852ce9ce33fb07April Chin * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
7c2fbfb345896881c631598ee3852ce9ce33fb07April Chin * If applicable, add the following below this CDDL HEADER, with the
7c2fbfb345896881c631598ee3852ce9ce33fb07April Chin * fields enclosed by brackets "[]" replaced with your own identifying
7c2fbfb345896881c631598ee3852ce9ce33fb07April Chin * information: Portions Copyright [yyyy] [name of copyright owner]
7c2fbfb345896881c631598ee3852ce9ce33fb07April Chin *
7c2fbfb345896881c631598ee3852ce9ce33fb07April Chin * CDDL HEADER END
7c2fbfb345896881c631598ee3852ce9ce33fb07April Chin */
7c2fbfb345896881c631598ee3852ce9ce33fb07April Chin
7c2fbfb345896881c631598ee3852ce9ce33fb07April Chin/*
a4aeef46cda1835da2b19f8f62b4526de6521e6cDonghai Qiao * Copyright 2010 Sun Microsystems, Inc.  All rights reserved.
7c2fbfb345896881c631598ee3852ce9ce33fb07April Chin * Use is subject to license terms.
7c2fbfb345896881c631598ee3852ce9ce33fb07April Chin */
7c2fbfb345896881c631598ee3852ce9ce33fb07April Chin
7c2fbfb345896881c631598ee3852ce9ce33fb07April Chin#include <sys/types.h>
7c2fbfb345896881c631598ee3852ce9ce33fb07April Chin#include <sys/param.h>
7c2fbfb345896881c631598ee3852ce9ce33fb07April Chin#include <sys/sysmacros.h>
7c2fbfb345896881c631598ee3852ce9ce33fb07April Chin#include <sys/signal.h>
7c2fbfb345896881c631598ee3852ce9ce33fb07April Chin#include <sys/cred.h>
7c2fbfb345896881c631598ee3852ce9ce33fb07April Chin#include <sys/user.h>
7c2fbfb345896881c631598ee3852ce9ce33fb07April Chin#include <sys/errno.h>
7c2fbfb345896881c631598ee3852ce9ce33fb07April Chin#include <sys/vnode.h>
7c2fbfb345896881c631598ee3852ce9ce33fb07April Chin#include <sys/proc.h>
7c2fbfb345896881c631598ee3852ce9ce33fb07April Chin#include <sys/cmn_err.h>
7c2fbfb345896881c631598ee3852ce9ce33fb07April Chin#include <sys/debug.h>
7c2fbfb345896881c631598ee3852ce9ce33fb07April Chin#include <sys/pathname.h>
7c2fbfb345896881c631598ee3852ce9ce33fb07April Chin#include <sys/disp.h>
7c2fbfb345896881c631598ee3852ce9ce33fb07April Chin#include <sys/exec.h>
7c2fbfb345896881c631598ee3852ce9ce33fb07April Chin#include <sys/kmem.h>
7c2fbfb345896881c631598ee3852ce9ce33fb07April Chin#include <sys/note.h>
7c2fbfb345896881c631598ee3852ce9ce33fb07April Chin
7c2fbfb345896881c631598ee3852ce9ce33fb07April Chin/*
7c2fbfb345896881c631598ee3852ce9ce33fb07April Chin * This is the loadable module wrapper.
7c2fbfb345896881c631598ee3852ce9ce33fb07April Chin */
7c2fbfb345896881c631598ee3852ce9ce33fb07April Chin#include <sys/modctl.h>
7c2fbfb345896881c631598ee3852ce9ce33fb07April Chin
ce67301fa82625f5594913e8ab6abf9e0aa461d0Roland Mainz/* Local prototypes */
ce67301fa82625f5594913e8ab6abf9e0aa461d0Roland Mainzstatic int
7c2fbfb345896881c631598ee3852ce9ce33fb07April Chinshbinexec(
7c2fbfb345896881c631598ee3852ce9ce33fb07April Chin    struct vnode *vp,
7c2fbfb345896881c631598ee3852ce9ce33fb07April Chin    struct execa *uap,
7c2fbfb345896881c631598ee3852ce9ce33fb07April Chin    struct uarg *args,
7c2fbfb345896881c631598ee3852ce9ce33fb07April Chin    struct intpdata *idatap,
7c2fbfb345896881c631598ee3852ce9ce33fb07April Chin    int level,
7c2fbfb345896881c631598ee3852ce9ce33fb07April Chin    long *execsz,
7c2fbfb345896881c631598ee3852ce9ce33fb07April Chin    int setid,
7c2fbfb345896881c631598ee3852ce9ce33fb07April Chin    caddr_t exec_file,
7c2fbfb345896881c631598ee3852ce9ce33fb07April Chin    struct cred *cred,
7c2fbfb345896881c631598ee3852ce9ce33fb07April Chin    int brand_action);
7c2fbfb345896881c631598ee3852ce9ce33fb07April Chin
7c2fbfb345896881c631598ee3852ce9ce33fb07April Chin#define SHBIN_CNTL(x)   ((x)&037)
7c2fbfb345896881c631598ee3852ce9ce33fb07April Chin#define SHBINMAGIC_LEN  4
7c2fbfb345896881c631598ee3852ce9ce33fb07April Chinextern char shbinmagicstr[];
7c2fbfb345896881c631598ee3852ce9ce33fb07April Chin
7c2fbfb345896881c631598ee3852ce9ce33fb07April Chin/*
7c2fbfb345896881c631598ee3852ce9ce33fb07April Chin * Our list where we may find a copy of ksh93. The ordering is:
7c2fbfb345896881c631598ee3852ce9ce33fb07April Chin * 1. 64bit (may not be installed or not supported in hardware)
7c2fbfb345896881c631598ee3852ce9ce33fb07April Chin * 2. 32bit
7c2fbfb345896881c631598ee3852ce9ce33fb07April Chin * 3. Use /sbin/ksh93 when /usr is not available
7c2fbfb345896881c631598ee3852ce9ce33fb07April Chin *
7c2fbfb345896881c631598ee3852ce9ce33fb07April Chin * ([1] and [2] explicitly bypass /usr/bin/ksh93 to avoid the
7c2fbfb345896881c631598ee3852ce9ce33fb07April Chin * isaexec overhead).
7c2fbfb345896881c631598ee3852ce9ce33fb07April Chin */
7c2fbfb345896881c631598ee3852ce9ce33fb07April Chinstatic char *shell_list[] =
7c2fbfb345896881c631598ee3852ce9ce33fb07April Chin{
7c2fbfb345896881c631598ee3852ce9ce33fb07April Chin/* Bypass /usr/bin/ksh93 (which is "isaexec") for performance */
7c2fbfb345896881c631598ee3852ce9ce33fb07April Chin#if defined(__sparc)
7c2fbfb345896881c631598ee3852ce9ce33fb07April Chin    "/usr/bin/sparcv9/ksh93",
7c2fbfb345896881c631598ee3852ce9ce33fb07April Chin    "/usr/bin/sparcv7/ksh93",
7c2fbfb345896881c631598ee3852ce9ce33fb07April Chin#elif defined(__amd64)
7c2fbfb345896881c631598ee3852ce9ce33fb07April Chin    "/usr/bin/amd64/ksh93",
7c2fbfb345896881c631598ee3852ce9ce33fb07April Chin    "/usr/bin/i86/ksh93",
7c2fbfb345896881c631598ee3852ce9ce33fb07April Chin#elif defined(__i386)
7c2fbfb345896881c631598ee3852ce9ce33fb07April Chin    "/usr/bin/i86/ksh93",
7c2fbfb345896881c631598ee3852ce9ce33fb07April Chin#else
7c2fbfb345896881c631598ee3852ce9ce33fb07April Chin#error "Unrecognized platform/CPU (use /usr/bin/ksh93 when in doubt)."
7c2fbfb345896881c631598ee3852ce9ce33fb07April Chin#endif
7c2fbfb345896881c631598ee3852ce9ce33fb07April Chin    "/sbin/ksh93",
7c2fbfb345896881c631598ee3852ce9ce33fb07April Chin    NULL
7c2fbfb345896881c631598ee3852ce9ce33fb07April Chin};
7c2fbfb345896881c631598ee3852ce9ce33fb07April Chin
7c2fbfb345896881c631598ee3852ce9ce33fb07April Chinstatic struct execsw esw = {
7c2fbfb345896881c631598ee3852ce9ce33fb07April Chin    shbinmagicstr,
7c2fbfb345896881c631598ee3852ce9ce33fb07April Chin    0,
7c2fbfb345896881c631598ee3852ce9ce33fb07April Chin    SHBINMAGIC_LEN,
7c2fbfb345896881c631598ee3852ce9ce33fb07April Chin    shbinexec,
7c2fbfb345896881c631598ee3852ce9ce33fb07April Chin    NULL
7c2fbfb345896881c631598ee3852ce9ce33fb07April Chin};
7c2fbfb345896881c631598ee3852ce9ce33fb07April Chin
7c2fbfb345896881c631598ee3852ce9ce33fb07April Chin/*
7c2fbfb345896881c631598ee3852ce9ce33fb07April Chin * Module linkage information for the kernel.
7c2fbfb345896881c631598ee3852ce9ce33fb07April Chin */
7c2fbfb345896881c631598ee3852ce9ce33fb07April Chinextern struct mod_ops mod_execops;
7c2fbfb345896881c631598ee3852ce9ce33fb07April Chin
7c2fbfb345896881c631598ee3852ce9ce33fb07April Chinstatic struct modlexec modlexec = {
7c2fbfb345896881c631598ee3852ce9ce33fb07April Chin    &mod_execops, "exec mod for shell binaries (ksh93)", &esw
7c2fbfb345896881c631598ee3852ce9ce33fb07April Chin};
7c2fbfb345896881c631598ee3852ce9ce33fb07April Chin
7c2fbfb345896881c631598ee3852ce9ce33fb07April Chinstatic struct modlinkage modlinkage = {
7c2fbfb345896881c631598ee3852ce9ce33fb07April Chin    MODREV_1, (void *)&modlexec, NULL
7c2fbfb345896881c631598ee3852ce9ce33fb07April Chin};
7c2fbfb345896881c631598ee3852ce9ce33fb07April Chin
7c2fbfb345896881c631598ee3852ce9ce33fb07April Chinint
7c2fbfb345896881c631598ee3852ce9ce33fb07April Chin_init(void)
7c2fbfb345896881c631598ee3852ce9ce33fb07April Chin{
7c2fbfb345896881c631598ee3852ce9ce33fb07April Chin    return (mod_install(&modlinkage));
7c2fbfb345896881c631598ee3852ce9ce33fb07April Chin}
7c2fbfb345896881c631598ee3852ce9ce33fb07April Chin
7c2fbfb345896881c631598ee3852ce9ce33fb07April Chinint
7c2fbfb345896881c631598ee3852ce9ce33fb07April Chin_fini(void)
7c2fbfb345896881c631598ee3852ce9ce33fb07April Chin{
7c2fbfb345896881c631598ee3852ce9ce33fb07April Chin    return (mod_remove(&modlinkage));
7c2fbfb345896881c631598ee3852ce9ce33fb07April Chin}
7c2fbfb345896881c631598ee3852ce9ce33fb07April Chin
7c2fbfb345896881c631598ee3852ce9ce33fb07April Chinint
7c2fbfb345896881c631598ee3852ce9ce33fb07April Chin_info(struct modinfo *modinfop)
7c2fbfb345896881c631598ee3852ce9ce33fb07April Chin{
7c2fbfb345896881c631598ee3852ce9ce33fb07April Chin    return (mod_info(&modlinkage, modinfop));
7c2fbfb345896881c631598ee3852ce9ce33fb07April Chin}
7c2fbfb345896881c631598ee3852ce9ce33fb07April Chin
7c2fbfb345896881c631598ee3852ce9ce33fb07April Chinstatic int
7c2fbfb345896881c631598ee3852ce9ce33fb07April Chincheckshbinmagic(struct vnode *vp)
7c2fbfb345896881c631598ee3852ce9ce33fb07April Chin{
7c2fbfb345896881c631598ee3852ce9ce33fb07April Chin    int error;
7c2fbfb345896881c631598ee3852ce9ce33fb07April Chin    char linep[SHBINMAGIC_LEN];
7c2fbfb345896881c631598ee3852ce9ce33fb07April Chin    ssize_t resid;
7c2fbfb345896881c631598ee3852ce9ce33fb07April Chin
7c2fbfb345896881c631598ee3852ce9ce33fb07April Chin    /*
7c2fbfb345896881c631598ee3852ce9ce33fb07April Chin     * Read the entire line and confirm that it starts with the magic
7c2fbfb345896881c631598ee3852ce9ce33fb07April Chin     * sequence for compiled ksh93 shell scripts.
7c2fbfb345896881c631598ee3852ce9ce33fb07April Chin     */
7c2fbfb345896881c631598ee3852ce9ce33fb07April Chin    if (error = vn_rdwr(UIO_READ, vp, linep, sizeof (linep), (offset_t)0,
7c2fbfb345896881c631598ee3852ce9ce33fb07April Chin        UIO_SYSSPACE, 0, (rlim64_t)0, CRED(), &resid))
7c2fbfb345896881c631598ee3852ce9ce33fb07April Chin        return (error);
7c2fbfb345896881c631598ee3852ce9ce33fb07April Chin
7c2fbfb345896881c631598ee3852ce9ce33fb07April Chin    if (memcmp(linep, shbinmagicstr, SHBINMAGIC_LEN) != 0)
7c2fbfb345896881c631598ee3852ce9ce33fb07April Chin        return (ENOEXEC);
7c2fbfb345896881c631598ee3852ce9ce33fb07April Chin
7c2fbfb345896881c631598ee3852ce9ce33fb07April Chin    return (0);
7c2fbfb345896881c631598ee3852ce9ce33fb07April Chin}
7c2fbfb345896881c631598ee3852ce9ce33fb07April Chin
ce67301fa82625f5594913e8ab6abf9e0aa461d0Roland Mainzstatic int
7c2fbfb345896881c631598ee3852ce9ce33fb07April Chinshbinexec(
7c2fbfb345896881c631598ee3852ce9ce33fb07April Chin    struct vnode *vp,
7c2fbfb345896881c631598ee3852ce9ce33fb07April Chin    struct execa *uap,
7c2fbfb345896881c631598ee3852ce9ce33fb07April Chin    struct uarg *args,
7c2fbfb345896881c631598ee3852ce9ce33fb07April Chin    struct intpdata *idatap,
7c2fbfb345896881c631598ee3852ce9ce33fb07April Chin    int level,
7c2fbfb345896881c631598ee3852ce9ce33fb07April Chin    long *execsz,
7c2fbfb345896881c631598ee3852ce9ce33fb07April Chin    int setid,
7c2fbfb345896881c631598ee3852ce9ce33fb07April Chin    caddr_t exec_file,
7c2fbfb345896881c631598ee3852ce9ce33fb07April Chin    struct cred *cred,
7c2fbfb345896881c631598ee3852ce9ce33fb07April Chin    int brand_action)
7c2fbfb345896881c631598ee3852ce9ce33fb07April Chin{
7c2fbfb345896881c631598ee3852ce9ce33fb07April Chin    _NOTE(ARGUNUSED(brand_action))
7c2fbfb345896881c631598ee3852ce9ce33fb07April Chin    vnode_t *nvp;
7c2fbfb345896881c631598ee3852ce9ce33fb07April Chin    int error = 0;
7c2fbfb345896881c631598ee3852ce9ce33fb07April Chin    struct intpdata idata;
7c2fbfb345896881c631598ee3852ce9ce33fb07April Chin    struct pathname intppn;
7c2fbfb345896881c631598ee3852ce9ce33fb07April Chin    struct pathname resolvepn;
7c2fbfb345896881c631598ee3852ce9ce33fb07April Chin    char *opath;
7c2fbfb345896881c631598ee3852ce9ce33fb07April Chin    char devfd[19]; /* 32-bit int fits in 10 digits + 8 for "/dev/fd/" */
7c2fbfb345896881c631598ee3852ce9ce33fb07April Chin    int fd = -1;
7c2fbfb345896881c631598ee3852ce9ce33fb07April Chin    int i;
7c2fbfb345896881c631598ee3852ce9ce33fb07April Chin
7c2fbfb345896881c631598ee3852ce9ce33fb07April Chin    if (level) {        /* Can't recurse */
7c2fbfb345896881c631598ee3852ce9ce33fb07April Chin        error = ENOEXEC;
7c2fbfb345896881c631598ee3852ce9ce33fb07April Chin        goto bad;
7c2fbfb345896881c631598ee3852ce9ce33fb07April Chin    }
7c2fbfb345896881c631598ee3852ce9ce33fb07April Chin
7c2fbfb345896881c631598ee3852ce9ce33fb07April Chin    ASSERT(idatap == (struct intpdata *)NULL);
7c2fbfb345896881c631598ee3852ce9ce33fb07April Chin
7c2fbfb345896881c631598ee3852ce9ce33fb07April Chin    /*
7c2fbfb345896881c631598ee3852ce9ce33fb07April Chin     * Check whether the executable has the correct magic value.
7c2fbfb345896881c631598ee3852ce9ce33fb07April Chin     */
7c2fbfb345896881c631598ee3852ce9ce33fb07April Chin    if (error = checkshbinmagic(vp))
7c2fbfb345896881c631598ee3852ce9ce33fb07April Chin        goto fail;
7c2fbfb345896881c631598ee3852ce9ce33fb07April Chin
7c2fbfb345896881c631598ee3852ce9ce33fb07April Chin    pn_alloc(&resolvepn);
7c2fbfb345896881c631598ee3852ce9ce33fb07April Chin
7c2fbfb345896881c631598ee3852ce9ce33fb07April Chin    /*
7c2fbfb345896881c631598ee3852ce9ce33fb07April Chin     * Travel the list of shells and look for one which is available...
7c2fbfb345896881c631598ee3852ce9ce33fb07April Chin     */
7c2fbfb345896881c631598ee3852ce9ce33fb07April Chin    for (i = 0; shell_list[i] != NULL; i++) {
7c2fbfb345896881c631598ee3852ce9ce33fb07April Chin        error = pn_get(shell_list[i], UIO_SYSSPACE, &intppn);
7c2fbfb345896881c631598ee3852ce9ce33fb07April Chin        if (error != 0) {
7c2fbfb345896881c631598ee3852ce9ce33fb07April Chin            break;
7c2fbfb345896881c631598ee3852ce9ce33fb07April Chin        }
7c2fbfb345896881c631598ee3852ce9ce33fb07April Chin
7c2fbfb345896881c631598ee3852ce9ce33fb07April Chin        error = lookuppn(&intppn, &resolvepn, FOLLOW, NULLVPP, &nvp);
7c2fbfb345896881c631598ee3852ce9ce33fb07April Chin        if (!error) {
7c2fbfb345896881c631598ee3852ce9ce33fb07April Chin            /* Found match */
7c2fbfb345896881c631598ee3852ce9ce33fb07April Chin            break;
7c2fbfb345896881c631598ee3852ce9ce33fb07April Chin        }
7c2fbfb345896881c631598ee3852ce9ce33fb07April Chin
7c2fbfb345896881c631598ee3852ce9ce33fb07April Chin        /* No match found ? Then continue with the next item... */
7c2fbfb345896881c631598ee3852ce9ce33fb07April Chin        pn_free(&intppn);
7c2fbfb345896881c631598ee3852ce9ce33fb07April Chin    }
7c2fbfb345896881c631598ee3852ce9ce33fb07April Chin
7c2fbfb345896881c631598ee3852ce9ce33fb07April Chin    if (error) {
7c2fbfb345896881c631598ee3852ce9ce33fb07April Chin        pn_free(&resolvepn);
7c2fbfb345896881c631598ee3852ce9ce33fb07April Chin        goto fail;
7c2fbfb345896881c631598ee3852ce9ce33fb07April Chin    }
7c2fbfb345896881c631598ee3852ce9ce33fb07April Chin
ce67301fa82625f5594913e8ab6abf9e0aa461d0Roland Mainz    /*
ce67301fa82625f5594913e8ab6abf9e0aa461d0Roland Mainz     * Setup interpreter data
ce67301fa82625f5594913e8ab6abf9e0aa461d0Roland Mainz     * "--" is passed to mark the end-of-arguments before adding
ce67301fa82625f5594913e8ab6abf9e0aa461d0Roland Mainz     * the scripts file name, preventing problems when a
ce67301fa82625f5594913e8ab6abf9e0aa461d0Roland Mainz     * a script's name starts with a '-' character.
ce67301fa82625f5594913e8ab6abf9e0aa461d0Roland Mainz     */
ce67301fa82625f5594913e8ab6abf9e0aa461d0Roland Mainz    idata.intp = NULL;
93cf283ac1d0119d2ee3842f515f8d0e1bc7cbdbJerry Jelinek    idata.intp_name[0] = shell_list[i];
93cf283ac1d0119d2ee3842f515f8d0e1bc7cbdbJerry Jelinek    idata.intp_arg[0] = "--";
ce67301fa82625f5594913e8ab6abf9e0aa461d0Roland Mainz
7c2fbfb345896881c631598ee3852ce9ce33fb07April Chin    opath = args->pathname;
7c2fbfb345896881c631598ee3852ce9ce33fb07April Chin    args->pathname = resolvepn.pn_path;
7c2fbfb345896881c631598ee3852ce9ce33fb07April Chin    /* don't free resolvepn until we are done with args */
7c2fbfb345896881c631598ee3852ce9ce33fb07April Chin    pn_free(&intppn);
7c2fbfb345896881c631598ee3852ce9ce33fb07April Chin
7c2fbfb345896881c631598ee3852ce9ce33fb07April Chin    /*
7c2fbfb345896881c631598ee3852ce9ce33fb07April Chin     * When we're executing a set-uid script resulting in uids
7c2fbfb345896881c631598ee3852ce9ce33fb07April Chin     * mismatching or when we execute with additional privileges,
7c2fbfb345896881c631598ee3852ce9ce33fb07April Chin     * we close the "replace script between exec and open by shell"
7c2fbfb345896881c631598ee3852ce9ce33fb07April Chin     * hole by passing the script as /dev/fd parameter.
7c2fbfb345896881c631598ee3852ce9ce33fb07April Chin     */
7c2fbfb345896881c631598ee3852ce9ce33fb07April Chin    if ((setid & EXECSETID_PRIVS) != 0 ||
7c2fbfb345896881c631598ee3852ce9ce33fb07April Chin        (setid & (EXECSETID_UGIDS|EXECSETID_SETID)) ==
7c2fbfb345896881c631598ee3852ce9ce33fb07April Chin        (EXECSETID_UGIDS|EXECSETID_SETID)) {
7c2fbfb345896881c631598ee3852ce9ce33fb07April Chin        (void) strcpy(devfd, "/dev/fd/");
7c2fbfb345896881c631598ee3852ce9ce33fb07April Chin        if (error = execopen(&vp, &fd))
7c2fbfb345896881c631598ee3852ce9ce33fb07April Chin            goto done;
7c2fbfb345896881c631598ee3852ce9ce33fb07April Chin        numtos(fd, &devfd[8]);
7c2fbfb345896881c631598ee3852ce9ce33fb07April Chin        args->fname = devfd;
7c2fbfb345896881c631598ee3852ce9ce33fb07April Chin    }
7c2fbfb345896881c631598ee3852ce9ce33fb07April Chin
7c2fbfb345896881c631598ee3852ce9ce33fb07April Chin    error = gexec(&nvp, uap, args, &idata, ++level, execsz, exec_file, cred,
7c2fbfb345896881c631598ee3852ce9ce33fb07April Chin        EBA_NONE);
a4aeef46cda1835da2b19f8f62b4526de6521e6cDonghai Qiao
a4aeef46cda1835da2b19f8f62b4526de6521e6cDonghai Qiao    if (!error) {
a4aeef46cda1835da2b19f8f62b4526de6521e6cDonghai Qiao        /*
a4aeef46cda1835da2b19f8f62b4526de6521e6cDonghai Qiao         * Close this script as the sh interpreter
a4aeef46cda1835da2b19f8f62b4526de6521e6cDonghai Qiao         * will open and close it later on.
a4aeef46cda1835da2b19f8f62b4526de6521e6cDonghai Qiao         */
a4aeef46cda1835da2b19f8f62b4526de6521e6cDonghai Qiao        (void) VOP_CLOSE(vp, FREAD, 1, (offset_t)0, cred, NULL);
a4aeef46cda1835da2b19f8f62b4526de6521e6cDonghai Qiao    }
7c2fbfb345896881c631598ee3852ce9ce33fb07April Chindone:
7c2fbfb345896881c631598ee3852ce9ce33fb07April Chin    VN_RELE(nvp);
7c2fbfb345896881c631598ee3852ce9ce33fb07April Chin    args->pathname = opath;
7c2fbfb345896881c631598ee3852ce9ce33fb07April Chin    pn_free(&resolvepn);
7c2fbfb345896881c631598ee3852ce9ce33fb07April Chinfail:
7c2fbfb345896881c631598ee3852ce9ce33fb07April Chin    if (error && fd != -1)
7c2fbfb345896881c631598ee3852ce9ce33fb07April Chin        (void) execclose(fd);
7c2fbfb345896881c631598ee3852ce9ce33fb07April Chinbad:
7c2fbfb345896881c631598ee3852ce9ce33fb07April Chin    return (error);
7c2fbfb345896881c631598ee3852ce9ce33fb07April Chin}