svc/lsvcrun/lsvcrun.c

	lsvcrun.c revision d28831b861181e5df28cac8efd6a92489e6feded
/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License (the "License").
 * You may not use this file except in compliance with the License.
 *
 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
 * or http://www.opensolaris.org/os/licensing.
 * See the License for the specific language governing permissions
 * and limitations under the License.
 *
 * When distributing Covered Code, include this CDDL HEADER in each
 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
 * If applicable, add the following below this CDDL HEADER, with the
 * fields enclosed by brackets "[]" replaced with your own identifying
 * information: Portions Copyright [yyyy] [name of copyright owner]
 *
 * CDDL HEADER END
 */
/*
 * Copyright (c) 2004, 2010, Oracle and/or its affiliates. All rights reserved.
 */

/*
 * lsvcrun - run an rc?.d script, modifying appropriate data in the
 * repository to reflect legacy behavior.
 *
 * We try to keep track of what we can for the legacy scripts via
 * property groups under the smf/legacy_run service.  Each property
 * group identifies a service, named in the form 'rc2_d_S10foo'.
 *
 * Each group has the following properties: name, the script name
 * displayed by svcs(1m); state_timestamp; contract, contract ID;
 * inode, the inode of the script; and suffix, the suffix of the
 * script name, e.g. 'foo'.
 *
 * In order to support rc scripts which delete themselves upon invocation we
 * collect inode before running the script.
 *
 * When we run a K script, we try to identify and remove the
 * property group by means of examining the inode and script
 * suffix.  The inode check means more than one script with the
 * same suffix will still work as intended in the common case.
 *
 * If we cannot find a property group, or one already exists
 * when we try to add one, then we print a suitable warning.  These
 * are warnings because there was no strict requirement that K
 * and S scripts be matched up.
 *
 * In the face of these assumptions being proved wrong, we always
 * make sure to execute the script anyway in an attempt to keep
 * things working as they used to.  If we can't execute the script,
 * we try to leave the repository in the state it was before.
 */

#include <sys/ctfs.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <sys/stat.h>
#include <assert.h>
#include <ctype.h>
#include <errno.h>
#include <fcntl.h>
#include <fnmatch.h>
#include <libcontract.h>
#include <libcontract_priv.h>
#include <libintl.h>
#include <libscf.h>
#include <libscf_priv.h>
#include <libuutil.h>
#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <strings.h>
#include <time.h>
#include <unistd.h>
#include <limits.h>


/* Environment variables to pass on.  See clean_environment(). */
static char *evars_to_pass[] = { "LANG", "LC_ALL", "LC_COLLATE", "LC_CTYPE",
    "LC_MESSAGES", "LC_MONETARY", "LC_NUMERIC", "LC_TIME", "PATH", "TZ"
};

#define EVARS_TO_PASS_NUM                       \
    (sizeof (evars_to_pass) / sizeof (*evars_to_pass))


static void
usage()
{
    (void) fprintf(stderr,
        gettext("Usage: %s [-s] script {start | stop}\n"), uu_getpname());
    exit(UU_EXIT_USAGE);
}

/*
 * Pick out the script name and convert it for use as an SMF property
 * group name.
 */
static char *
start_pg_name(const char *path)
{
    char *out, *cp;

    if (fnmatch("/etc/rc[0-6S].d/S*", path, FNM_PATHNAME) != 0) {
        uu_warn(gettext("couldn't parse name %s.\n"), path);
        return (NULL);
    }

    out = strdup(path + sizeof ("/etc/") - 1);

    if (out == NULL) {
        uu_warn(gettext("strdup() failed (%s).\n"), strerror(errno));
        return (NULL);
    }

    /* Convert illegal characters to _. */
    for (cp = out; *cp != '\0'; ++cp) {
        /* locale problem? */
        if (!isalnum(*cp) && *cp != '-')
            *cp = '_';
    }

    return (out);
}

static char *
script_suffix(const char *path)
{
    const char *cp;
    char *out;

    if (fnmatch("/etc/rc[0-6S].d/[SK]*", path, FNM_PATHNAME) != 0) {
        uu_warn(gettext("couldn't parse name %s.\n"), path);
        return (NULL);
    }

    cp = path + sizeof ("/etc/rc0.d/S") - 1;

    while (isdigit(*cp))
        cp++;

    if (*cp == '\0') {
        uu_warn(gettext("couldn't parse name %s.\n"), path);
        return (NULL);
    }

    out = strdup(cp);
    if (out == NULL)
        uu_warn(gettext("strdup() failed (%s).\n"), strerror(errno));

    return (out);
}

/*
 * Convert a path to an acceptable SMF (service) name.
 */
static char *
path_to_svc_name(const char *path)
{
    char *out, *cp;

    out = strdup(path);
    if (out == NULL) {
        uu_warn(gettext("strdup() failed (%s).\n"), strerror(errno));
        return (NULL);
    }

    /* Convert illegal characters to _. */
    for (cp = out; *cp != '\0'; ++cp) {
        /* locale problem? */
        if (!isalnum(*cp) && *cp != '-' && *cp != '/')
            *cp = '_';
    }

    /* If the first character is _, use a instead. */
    if (*out == '_')
        *out = 'a';

    return (out);
}

static void
scferr(const char *func)
{
    uu_warn(gettext("%s failed (%s).  Repository will not be modified.\n"),
        func, scf_strerror(scf_error()));
}

static scf_propertygroup_t *
get_start_pg(const char *script, scf_handle_t *h, scf_service_t *svc,
    boolean_t *ok)
{
    char *pg_name = NULL;
    scf_propertygroup_t *pg = NULL;
    scf_property_t *prop = NULL;

    if ((pg_name = start_pg_name(script)) == NULL)
        return (NULL);

    if ((pg = scf_pg_create(h)) == NULL) {
        scferr("scf_pg_create()");
        goto out;
    }

add:
    if (scf_service_add_pg(svc, pg_name, SCF_GROUP_FRAMEWORK,
        SCF_PG_FLAG_NONPERSISTENT, pg) == 0) {
        *ok = 1;
        free(pg_name);
        return (pg);
    }

    switch (scf_error()) {
    case SCF_ERROR_INVALID_ARGUMENT:
        assert(0);
        abort();
        /* NOTREACHED */

    case SCF_ERROR_EXISTS:
        break;

    case SCF_ERROR_PERMISSION_DENIED:
        uu_die(gettext(
            "Insufficient privilege to add repository properties; "
            "not launching \"%s\".\n"), script);
        /* NOTREACHED */

    default:
        scferr("scf_service_add_pg()");
        scf_pg_destroy(pg);
        pg = NULL;
        goto out;
    }

    if (scf_service_get_pg(svc, pg_name, pg) != 0) {
        switch (scf_error()) {
        case SCF_ERROR_INVALID_ARGUMENT:
            assert(0);
            abort();
            /* NOTREACHED */

        case SCF_ERROR_NOT_FOUND:
            goto add;

        default:
            scferr("scf_service_get_pg()");
            scf_pg_destroy(pg);
            pg = NULL;
            goto out;
        }
    }

    if ((prop = scf_property_create(h)) == NULL) {
        scferr("scf_property_create()");
        scf_pg_destroy(pg);
        pg = NULL;
        goto out;
    }

    /*
     * See if the pg has the name property.  If it has, that
     * implies we successfully ran the same script before.  We
     * should re-run it anyway, but not modify the existing pg;
     * this might lose contract-control but there's not much we
     * can do.
     *
     * If there's no name property, then we probably couldn't
     * remove the pg fully after a script failed to run.
     */

    if (scf_pg_get_property(pg, SCF_LEGACY_PROPERTY_NAME, prop) == 0) {
        uu_warn(gettext("Service matching \"%s\" "
            "seems to be running.\n"), script);
        scf_pg_destroy(pg);
        pg = NULL;
    } else if (scf_error() != SCF_ERROR_NOT_FOUND) {
        scferr("scf_pg_get_property()");
        scf_pg_destroy(pg);
        pg = NULL;
    } else {
        uu_warn(gettext("Service \"%s\" has an invalid property "
            "group.\n"), script);
    }

out:
    free(pg_name);
    scf_property_destroy(prop);
    return (pg);
}

static scf_propertygroup_t *
pg_match(scf_handle_t *h, scf_service_t *svc, ino_t ino, const char *suffix)
{
    char buf[PATH_MAX];
    scf_iter_t *iter = NULL;
    scf_propertygroup_t *pg = NULL;
    scf_property_t *prop = NULL;
    scf_value_t *val = NULL;

    if ((pg = scf_pg_create(h)) == NULL) {
        scferr("scf_pg_create()");
        goto err;
    }

    if ((iter = scf_iter_create(h)) == NULL) {
        scferr("scf_iter_create()");
        goto err;
    }

    if ((prop = scf_property_create(h)) == NULL) {
        scferr("scf_property_create()");
        goto err;
    }

    if ((val = scf_value_create(h)) == NULL) {
        scferr("scf_value_create()");
        goto err;
    }

    if (scf_iter_service_pgs_typed(iter, svc, SCF_GROUP_FRAMEWORK) !=
        0) {
        scferr("scf_iter_service_pgs_typed()");
        goto err;
    }

    while (scf_iter_next_pg(iter, pg) > 0) {
        int match = 1;

        if (suffix != NULL) {
            ssize_t len;

            if (scf_pg_get_property(pg, SCF_LEGACY_PROPERTY_SUFFIX,
                prop) != 0)
                continue;

            if (scf_property_get_value(prop, val) != 0)
                continue;

            len = scf_value_get_astring(val, buf, sizeof (buf));
            if (len < 0) {
                scferr("scf_value_get_astring()");
                goto err;
            }
            if (len >= sizeof (buf))
                continue;

            match = (strcmp(buf, suffix) == 0);
        }

        if (ino != 0) {
            uint64_t pval;

            if (scf_pg_get_property(pg, SCF_LEGACY_PROPERTY_INODE,
                prop) != 0)
                continue;

            if (scf_property_get_value(prop, val) != 0)
                continue;

            if (scf_value_get_count(val, &pval) != 0)
                continue;

            match = (ino == pval) && match;
        }

        if (match)
            goto out;
    }

err:
    scf_pg_destroy(pg);
    pg = NULL;

out:
    scf_value_destroy(val);
    scf_iter_destroy(iter);
    scf_property_destroy(prop);
    return (pg);
}

/*
 * Try and find the property group matching the service this script
 * stops.  First we look for a matching inode plus a matching suffix.
 * This commonly succeeds, but if not, we just search for inode.
 * Finally, we try for just the script suffix.
 */
static scf_propertygroup_t *
get_stop_pg(const char *script, scf_handle_t *h, scf_service_t *svc,
    boolean_t *ok)
{
    struct stat st;
    char *suffix;
    scf_propertygroup_t *pg;

    if (stat(script, &st) != 0) {
        uu_warn(gettext("Couldn't stat %s (%s).\n"), script,
            strerror(errno));
        return (NULL);
    }

    if ((suffix = script_suffix(script)) == NULL) {
        pg = pg_match(h, svc, st.st_ino, NULL);
        if (pg != NULL)
            goto out;
        return (NULL);
    }

    if ((pg = pg_match(h, svc, st.st_ino, suffix)) != NULL)
        goto out;

    if ((pg = pg_match(h, svc, st.st_ino, NULL)) != NULL)
        goto out;

    if ((pg = pg_match(h, svc, 0, suffix)) == NULL) {
        uu_warn(gettext("Service matching \"%s\" "
            "doesn't seem to be running.\n"), script);
        free(suffix);
        return (NULL);
    }

out:
    *ok = 1;
    free(suffix);
    return (pg);
}

static scf_propertygroup_t *
get_script_pg(const char *script, boolean_t start_flag, boolean_t *ok)
{
    scf_handle_t *h = NULL;
    scf_scope_t *scope = NULL;
    scf_service_t *svc = NULL;
    scf_propertygroup_t *pg = NULL;

    *ok = 0;

    h = scf_handle_create(SCF_VERSION);
    if (h == NULL) {
        scferr("scf_handle_create()");
        goto out;
    }

    if (scf_handle_bind(h) != 0) {
        if (scf_error() != SCF_ERROR_NO_SERVER) {
            scferr("scf_handle_bind()");
        } else {
            uu_warn(gettext(
                "Could not connect to svc.configd.\n"));
        }
        goto out;
    }

    if ((scope = scf_scope_create(h)) == NULL) {
        scferr("scf_scope_create()");
        goto out;
    }

    if ((svc = scf_service_create(h)) == NULL) {
        scferr("scf_service_create()");
        goto out;
    }

    if (scf_handle_get_scope(h, SCF_SCOPE_LOCAL, scope) != 0) {
        scferr("scf_handle_get_local_scope()");
        goto out;
    }

    if (scf_scope_get_service(scope, SCF_LEGACY_SERVICE, svc) != 0) {
        if (scf_error() != SCF_ERROR_NOT_FOUND) {
            scferr("scf_scope_get_service()");
            goto out;
        }

        if (scf_scope_add_service(scope, SCF_LEGACY_SERVICE, svc) !=
            0) {
            scferr("scf_scope_add_service()");
            goto out;
        }
    }

    if (start_flag)
        pg = get_start_pg(script, h, svc, ok);
    else
        pg = get_stop_pg(script, h, svc, ok);

out:
    scf_service_destroy(svc);
    scf_scope_destroy(scope);
    return (pg);
}

static int
prepare_contract(const char *script, const char *action)
{
    int fd;
    char *svc_name;
    char *svc_strbuf;
    int err = 0;

    do {
        fd = open64(CTFS_ROOT "/process/template", O_RDWR);
    } while (fd < 0 && errno == EINTR);
    if (fd < 0) {
        uu_warn(gettext("Can not create contract"));
        return (-1);
    }

    svc_strbuf = malloc(CT_PARAM_MAX_SIZE);
    if (svc_strbuf == NULL) {
        uu_warn(gettext("Can not allocate memory"));
        err = -1;
        goto cleanup;
    }

    (void) strlcpy(svc_strbuf, SCF_FMRI_LEGACY_PREFIX, CT_PARAM_MAX_SIZE);
    svc_name = path_to_svc_name(script);
    (void) strlcat(svc_strbuf, svc_name ? svc_name : script,
        CT_PARAM_MAX_SIZE);
    if (svc_name != NULL) {
        free(svc_name);
    }

    if ((errno = ct_pr_tmpl_set_svc_fmri(fd, svc_strbuf)) != 0) {
        uu_warn(gettext("Can not set svc_fmri"));
        err = -1;
        goto cleanup;
    }

    (void) strlcpy(svc_strbuf, action, CT_PARAM_MAX_SIZE);
    if ((errno = ct_pr_tmpl_set_svc_aux(fd, svc_strbuf)) != 0) {
        uu_warn(gettext("Can not set svc_aux"));
        err = -1;
        goto cleanup;
    }

    /* Leave HWERR in fatal set. */

    errno = ct_tmpl_activate(fd);
    if (errno != 0) {
        assert(errno == EPERM);
        uu_warn(gettext("Can not activate contract template"));
        err = -1;
        goto cleanup;
    }

cleanup:
    if (svc_strbuf != NULL)
        free(svc_strbuf);
    (void) close(fd);

    return (err);
}

static void
cleanup_pg(scf_propertygroup_t *pg)
{
    scf_error_t err;
    char buf[80];

    if (scf_pg_delete(pg) == 0)
        return;

    err = scf_error();

    if (scf_pg_to_fmri(pg, buf, sizeof (buf)) != 0)
        (void) strcpy(buf, "?");

    uu_warn(gettext("Could not remove property group %s: %s.\n"), buf,
        scf_strerror(err));
}

/*
 * Create a duplicate environment which only contains approved
 * variables---those in evars_to_pass and those beginning with "_INIT_".
 */
static char **
approved_env(char **env)
{
    char **newenv;
    int i, i_new, j;

    for (i = 0; env[i] != NULL; ++i)
        ;

    newenv = malloc(sizeof (*newenv) * (i + 1));
    if (newenv == NULL)
        return (NULL);

    i_new = 0;

    for (i = 0; env[i] != NULL; ++i) {
        if (strncmp(env[i], "_INIT_", sizeof ("_INIT_") - 1) == 0) {
            newenv[i_new++] = env[i];
            continue;
        }

        for (j = 0; j < EVARS_TO_PASS_NUM; ++j) {
            size_t l = strlen(evars_to_pass[j]);

            if (env[i][l] == '=' &&
                strncmp(env[i], evars_to_pass[j], l) == 0)
                newenv[i_new++] = env[i];
        }
    }

    newenv[i_new] = NULL;

    return (newenv);
}

/*
 * Create a duplicate environment which does not contain any SMF_ variables.
 */
static char **
env_without_smf(char **env)
{
    char **newenv;
    int i, i_new;

    for (i = 0; env[i] != NULL; ++i)
        ;

    newenv = malloc(sizeof (*newenv) * (i + 1));
    if (newenv == NULL)
        return (NULL);

    i_new = 0;

    for (i = 0; env[i] != NULL; ++i) {
        if (strncmp(env[i], "SMF_", sizeof ("SMF_") - 1) == 0)
            continue;

        newenv[i_new++] = env[i];
    }

    newenv[i_new] = NULL;

    return (newenv);
}

static int
add_new_property(scf_handle_t *h, scf_transaction_t *tx, const char *name,
    scf_type_t ty, const void *val)
{
    scf_transaction_entry_t *e;
    scf_value_t *v;
    const char *func;
    const struct timeval *t;
    int r;

    if ((e = scf_entry_create(h)) == NULL) {
        func = "scf_entry_create()";
        goto err;
    }

    if ((v = scf_value_create(h)) == NULL) {
        func = "scf_value_create()";
        goto err;
    }

    r = scf_transaction_property_new(tx, e, name, ty);
    if (r != 0) {
        func = "scf_transaction_property_new()";
        goto err;
    }

    switch (ty) {
    case SCF_TYPE_COUNT:
        scf_value_set_count(v, (uint64_t)(uintptr_t)val);
        break;

    case SCF_TYPE_TIME:
        t = val;
        r = scf_value_set_time(v, t->tv_sec, 1000 * t->tv_usec);
        assert(r == 0);
        break;

    case SCF_TYPE_ASTRING:
        r = scf_value_set_astring(v, val);
        assert(r == 0);
        break;

    default:
        assert(0);
        abort();
    }

    if (scf_entry_add_value(e, v) == 0)
        return (0);

    func = "scf_entry_add_value()";

err:
    uu_warn(gettext("%s failed (%s).\n"), func, scf_strerror(scf_error()));
    return (-1);
}

static void
set_legacy_service(scf_propertygroup_t *pg, const char *script, ino_t inode)
{
    scf_handle_t *h;
    const char *func;
    char *suffix;
    scf_transaction_t *tx;
    struct timeval tstamp;
    ctid_t ctid;
    char *svc_name = NULL;
    int ret;

    h = scf_pg_handle(pg);
    if (h == NULL) {
        func = "scf_pg_handle()";
        goto scferr;
    }

    ret = gettimeofday(&tstamp, NULL);
    assert(ret == 0);

    if (errno = contract_latest(&ctid)) {
        uu_warn(gettext("Could not get contract"));
        goto err;
    }

    tx = scf_transaction_create(h);
    if (tx == NULL) {
        func = "scf_transaction_create()";
        goto scferr;
    }

    if (scf_transaction_start(tx, pg) != 0) {
        func = "scf_transaction_start()";
        goto scferr;
    }

    /*
     * We'd like to use the prettier svc_name, but if path_to_svc_name()
     * fails, we can use the script name anyway.
     */
    svc_name = path_to_svc_name(script);

    if (add_new_property(h, tx, SCF_LEGACY_PROPERTY_NAME, SCF_TYPE_ASTRING,
        (void *)(svc_name ? svc_name : script)) != 0)
        goto err;

    if (add_new_property(h, tx, SCF_PROPERTY_STATE_TIMESTAMP,
        SCF_TYPE_TIME, &tstamp) != 0)
        goto err;

    if (add_new_property(h, tx, SCF_LEGACY_PROPERTY_INODE,
        SCF_TYPE_COUNT, (void *)inode) != 0)
        goto err;

    if ((suffix = script_suffix(script)) != NULL) {
        if (add_new_property(h, tx, SCF_LEGACY_PROPERTY_SUFFIX,
            SCF_TYPE_ASTRING, (void *)suffix) != 0)
            goto err;

        free(suffix);
    }

    if (add_new_property(h, tx, SCF_PROPERTY_CONTRACT, SCF_TYPE_COUNT,
        (void *)ctid) != 0)
        goto err;

    for (;;) {
        switch (scf_transaction_commit(tx)) {
        case 1:
            free(svc_name);
            return;

        case 0:
            if (scf_pg_update(pg) == -1) {
                func = "scf_pg_update()";
                goto scferr;
            }
            continue;

        case -1:
            func = "scf_transaction_commit()";
            goto scferr;

        default:
            assert(0);
            abort();
        }
    }

scferr:
    uu_warn(gettext("%s failed (%s).\n"), func, scf_strerror(scf_error()));
err:
    uu_die(gettext("Could not commit property values to repository.\n"));
}

int
main(int argc, char *argv[], char *envp[])
{
    const char *restarter, *script, *action;
    boolean_t source = 0;
    int o;
    boolean_t start_flag;
    char **newenv;
    pid_t pid;
    int pipefds[2];
    char c;
    int exitstatus;
    struct stat st;

    scf_propertygroup_t *pg;
    boolean_t pg_ok;

    (void) uu_setpname(argv[0]);
    uu_alt_exit(UU_PROFILE_LAUNCHER);

    /* Make sure we were run by svc.startd. */
    if ((restarter = getenv("SMF_RESTARTER")) == NULL ||
        strcmp(restarter, SCF_SERVICE_STARTD) != 0)
        uu_die(gettext("invocation outside smf(5) inappropriate\n"));

    while ((o = getopt(argc, argv, "s")) != -1) {
        switch (o) {
        case 's':
            source = 1;
            break;

        default:
            usage();
        }
    }

    if (argc - optind != 2)
        usage();

    script = argv[optind];
    action = argv[optind + 1];

    if (strcmp(action, "start") == 0)
        start_flag = 1;
    else if (strcmp(action, "stop") == 0)
        start_flag = 0;
    else
        usage();

    /*
     * Look for the pg & exit if appropriate.  Also, if we're starting,
     * add the pg now so we can exit before launching the script if we
     * have insufficient repository privilege.
     *
     * If any other problem occurs, we carry on anyway.
     */
    pg = get_script_pg(script, start_flag, &pg_ok);

    /* Clean the environment.  Now so we can fail early. */
    if (!source)
        newenv = approved_env(envp);
    else
        newenv = env_without_smf(envp);
    if (newenv == NULL)
        uu_die(gettext(
            "Could not create new environment: out of memory.\n"));

    if (prepare_contract(script, action) == -1) {
        if (start_flag && pg != NULL)
            cleanup_pg(pg);

        exit(UU_EXIT_FATAL);
    }

    /* pipe to communicate exec success or failure */
    if (pipe(pipefds) != 0) {
        uu_warn(gettext("Could not create pipe"));

        if (start_flag && pg != NULL)
            cleanup_pg(pg);

        exit(UU_EXIT_FATAL);
    }

    if (!pg_ok)
        (void) printf(gettext("Executing legacy init script \"%s\" "
            "despite previous errors.\n"), script);
    else
        (void) printf(gettext("Executing legacy init script \"%s\".\n"),
            script);
    (void) fflush(stdout);

    if (stat(script, &st) != 0) {
        uu_warn(gettext("Couldn't stat %s (%s).\n"), script,
            strerror(errno));
        st.st_ino = (ino_t)0;
    }

    pid = fork();
    if (pid < 0) {
        uu_warn(gettext("Could not fork"));

        if (start_flag && pg != NULL)
            cleanup_pg(pg);

        exit(UU_EXIT_FATAL);
    }

    if (pid == 0) {
        /* child */

        const char *arg1, *arg2, *arg3;

        (void) close(pipefds[0]);
        (void) fcntl(pipefds[1], F_SETFD, FD_CLOEXEC);

        if (!source) {
            arg1 = "/bin/sh";
            arg2 = script;
            arg3 = action;
        } else {
            arg1 = "/bin/sh";
            arg2 = "-c";
            arg3 = script;
        }

        (void) execle(arg1, arg1, arg2, arg3, NULL, newenv);

        uu_warn(gettext("Could not exec \"%s %s %s\""), arg1,
            arg2, arg3);


        /* Notify parent of the failure. */
        while (write(pipefds[1], &c, 1) != 1) {
            switch (errno) {
            case EAGAIN:
                (void) sleep(1);

                /* FALLTHROUGH */

            case EINTR:
                continue;
            }

            uu_warn(gettext("Could not inform parent of error"));
            break;
        }

        exit(UU_EXIT_FATAL);
    }

    (void) close(pipefds[1]);

    if (read(pipefds[0], &c, sizeof (c)) > 0) {
        if (!start_flag)
            uu_die(gettext("exec() failed; leaving properties.\n"));
        else {
            uu_warn(gettext("exec() failed.\n"));
            if (pg != NULL)
                cleanup_pg(pg);
            exit(UU_EXIT_FATAL);
        }
    }

    while (waitpid(pid, &exitstatus, 0) == -1) {
        assert(errno == EINTR);
    }

    if (WIFSIGNALED(exitstatus)) {
        char buf[SIG2STR_MAX];
        (void) sig2str(WTERMSIG(exitstatus), buf);
        (void) printf(gettext("Legacy init script \"%s\" failed due "
            "to signal %s.\n"), script, buf);
    } else {
        (void) printf(gettext("Legacy init script \"%s\" exited with "
            "return code %d.\n"), script, WEXITSTATUS(exitstatus));
    }

    if (pg != NULL) {
        if (start_flag)
            set_legacy_service(pg, script, st.st_ino);
        else
            cleanup_pg(pg);
        scf_pg_destroy(pg);
    }

    return (UU_EXIT_OK);
}