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daemon.c
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daemon.c
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/*
* Copyright (c) 2024, Klara, Inc.
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include "config.h"
#include <sys/types.h>
#ifdef __APPLE__
#include <usbuf.h>
#else
#include <sys/sbuf.h>
#endif
#include <sys/time.h>
#include <assert.h>
#if HAVE_ERR
# include <err.h>
#endif
#include <ctype.h>
#include <errno.h>
#include <fcntl.h>
#include <getopt.h>
#include <glob.h>
#include <grp.h>
#include <limits.h>
#include <paths.h>
#if HAVE_B64_NTOP
#include <netinet/in.h>
#include <resolv.h>
#endif
#include <stdbool.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#if HAVE_SCAN_SCALED
# include <util.h>
#endif
#include <sys/param.h>
#include "extern.h"
#include "daemon.h"
#ifndef _PATH_ETC
#define _PATH_ETC "/etc"
#endif
#define _PATH_RSYNCD_CONF _PATH_ETC "/rsyncd.conf"
extern struct cleanup_ctx *cleanup_ctx;
static const char proto_prefix[] = "@RSYNCD: ";
enum {
OP_DAEMON = CHAR_MAX + 1,
OP_NO_DETACH,
OP_ADDRESS,
OP_BWLIMIT,
OP_CONFIG,
OP_PORT,
OP_LOG_FILE,
OP_LOG_FILE_FORMAT,
OP_SOCKOPTS,
};
static const struct option daemon_lopts[] = {
{ "address", required_argument, NULL, OP_ADDRESS },
{ "bwlimit", required_argument, NULL, OP_BWLIMIT },
{ "config", required_argument, NULL, OP_CONFIG },
{ "daemon", no_argument, NULL, OP_DAEMON },
{ "no-detach", no_argument, NULL, OP_NO_DETACH },
{ "ipv4", no_argument, NULL, '4' },
{ "ipv6", no_argument, NULL, '6' },
{ "help", no_argument, NULL, 'h' },
{ "log-file", required_argument, NULL, OP_LOG_FILE },
{ "log-file-format", required_argument, NULL, OP_LOG_FILE_FORMAT },
{ "port", required_argument, NULL, OP_PORT },
{ "sockopts", required_argument, NULL, OP_SOCKOPTS },
{ "verbose", no_argument, NULL, 'v' },
{ NULL, 0, NULL, 0 },
};
static void
daemon_usage(int exitcode)
{
fprintf(exitcode == 0 ? stdout : stderr, "usage: %s --daemon"
" [-46hv] [--address=bindaddr] [--bwlimit=limit] [--no-detach]\n"
"\t[--log-file=logfile] [--port=portnumber] [--sockopts=sockopts]\n",
getprogname());
exit(exitcode);
}
static int
daemon_list_module(struct daemon_cfg *dcfg, const char *module, void *cookie)
{
struct sess *sess;
struct daemon_role *role;
char *buf;
const char *comment;
int fd, list, rc;
sess = cookie;
role = (void *)sess->role;
fd = role->client;
if (cfg_param_bool(dcfg, module, "list", &list) != 0) {
ERRX("%s: 'list' is not valid", module);
return 0;
}
if (!list)
return 1;
if (!cfg_has_param(dcfg, module, "comment")) {
if (!io_write_line(sess, fd, module)) {
ERR("io_write_line");
return 0;
}
return 1;
}
rc = cfg_param_str(dcfg, module, "comment", &comment);
assert(rc == 0);
if (asprintf(&buf, "%-15s%s", module, comment) == -1) {
ERR("asprintf");
return 0;
}
if (!io_write_line(sess, fd, buf)) {
free(buf);
ERR("io_write_line");
return 0;
}
free(buf);
return 1;
}
static int
daemon_list(struct sess *sess)
{
struct daemon_role *role;
role = (void *)sess->role;
return cfg_foreach_module(role->dcfg, daemon_list_module, sess);
}
static int
daemon_read_hello(struct sess *sess, int fd, char **module)
{
char buf[BUFSIZ];
size_t linesz;
/*
* Client is waiting for us to respond, so just grab everything we can.
* It should have sent us exactly two lines:
* @RSYNCD: <version>\n
* <module>\n
*/
sess->rver = -1;
*module = NULL;
for (size_t linecnt = 0; linecnt < 2; linecnt++) {
linesz = sizeof(buf);
if (!io_read_line(sess, fd, buf, &linesz) ||
(linesz == 0 && linecnt == 0)) {
/*
* An empty line is an error, unless we already have our
* version information. If we only receive version
* information, it's implied that the client just wants
* a listing.
*/
daemon_client_error(sess,
"protocol violation: expected version and module information");
return -1;
} else if (linesz == sizeof(buf)) {
daemon_client_error(sess, "line buffer overrun");
errno = EINVAL;
return -1;
}
if (linecnt == 0) {
const char *line;
int major, minor;
line = buf;
if (strncmp(line, proto_prefix,
sizeof(proto_prefix) - 1) != 0) {
daemon_client_error(sess,
"protocol violation: expected version line, got '%s'",
line);
errno = EINVAL;
return -1;
}
line += sizeof(proto_prefix) - 1;
/*
* XXX Modern rsync sends:
* @RSYNCD: <version>.<subprotocol> <digest1> <digestN>
* @RSYNCD: 31.0 sha512 sha256 sha1 md5 md4
*/
if (sscanf(line, "%d.%d", &major, &minor) == 2) {
sess->rver = major;
} else if (sscanf(line, "%d", &major) == 1) {
sess->rver = major;
} else {
daemon_client_error(sess,
"protocol violation: malformed version line, got '%s'",
line);
errno = EINVAL;
return -1;
}
/*
* Discard the rest of the line, respond with our
* protocol version.
*/
(void)snprintf(buf, sizeof(buf), "@RSYNCD: %d",
sess->lver);
if (!io_write_line(sess, fd, buf)) {
/* XXX OS ERR */
return -1;
}
} else {
if (linesz == 0) {
*module = strdup("#list");
} else {
*module = strdup(buf);
}
if (*module == NULL) {
ERR("strdup");
return -1;
}
}
}
return 0;
}
#define OPT_ALLOC_SLOTS 5
static bool
daemon_add_option(struct sess *sess, size_t *oargc, char ***oargv,
size_t *oargvsz, const char *buf)
{
char **argv, **pargv;
size_t argc, argvsz, nextsz;
argv = *oargv;
argc = *oargc;
argvsz = *oargvsz;
if (argc == INT_MAX) {
/* XXX Do we want to limit byte size as well? */
daemon_client_error(sess,
"protection error: too many arguments sent");
return false;
}
/*
* If argc == argvsz, we need more to be able to null terminate
* the array properly.
*/
if (argc == argvsz) {
pargv = argv;
nextsz = argvsz + OPT_ALLOC_SLOTS;
argv = recallocarray(pargv, argvsz, nextsz,
sizeof(*argv));
if (argv == NULL) {
daemon_client_error(sess, "daemon out of memory");
return false;
}
*oargvsz = nextsz;
*oargv = argv;
}
argv[argc] = strdup(buf);
if (argv[argc] == NULL) {
daemon_client_error(sess, "daemon out of memory");
return false;
}
(*oargc)++;
return true;
}
static bool
daemon_add_glob(struct sess *sess, const char *module, size_t *oargc,
char ***oargv, size_t *oargvsz, char *buf, struct sbuf *argsb)
{
glob_t glb = { 0 };
int error;
bool ret;
/* Strip any <module>/ off the beginning. */
daemon_normalize_path(module, 0, buf);
if ((error = glob(buf, 0, NULL, &glb)) != 0 &&
error != GLOB_NOMATCH) {
fprintf(stderr, "returned %d\n", error);
daemon_client_error(sess, "glob '%s' failed", buf);
return false;
}
if (glb.gl_pathc == 0) {
/*
* If we didn't match anything, then we assume it was supposed
* to be a literal name.
*/
if (argsb != NULL) {
sbuf_cat(argsb, buf);
sbuf_putc(argsb, '\0');
}
ret = daemon_add_option(sess, oargc, oargv, oargvsz, buf);
} else {
/*
* Otherwise, we expand it in-place instead.
*/
ret = true;
for (size_t i = 0; i < glb.gl_pathc; i++) {
if (argsb != NULL) {
sbuf_cat(argsb, glb.gl_pathv[i]);
sbuf_putc(argsb, '\0');
}
if (!daemon_add_option(sess, oargc, oargv, oargvsz,
glb.gl_pathv[i])) {
ret = false;
break;
}
}
}
globfree(&glb);
return ret;
}
static int
daemon_read_options(struct sess *sess, const char *module, int fd,
int *oargc, char ***oargv)
{
char buf[BUFSIZ];
struct daemon_role *role;
struct sbuf *argsb, *reqsb;
char **argv;
size_t argc, argvsz, linesz;
bool fargs;
role = (void *)sess->role;
argv = NULL;
argc = 0;
fargs = false;
reqsb = NULL;
argsb = reqsb = NULL;
if (role->prexfer_pipe != -1) {
argsb = sbuf_new_auto();
if (argsb == NULL) {
daemon_client_error(sess, "daemon out of memory");
return -1;
}
reqsb = sbuf_new_auto();
if (reqsb == NULL) {
daemon_client_error(sess, "daemon out of memory");
return -1;
}
}
/*
* At a minimum we'll have these three lines:
*
* --server
* .
* <module>[/<path>]
*
* So we'll start with an array sized for 4 arguments to allow a little
* wiggle room, and we'll allocate in groups of 5 as we need more.
*/
argvsz = OPT_ALLOC_SLOTS;
argv = recallocarray(argv, 0, OPT_ALLOC_SLOTS, sizeof(*argv));
if (argv == NULL) {
daemon_client_error(sess, "daemon out of memory");
sbuf_delete(argsb);
sbuf_delete(reqsb);
if (argsb != NULL)
sbuf_delete(argsb);
if (reqsb != NULL)
sbuf_delete(reqsb);
return -1;
}
/* Fake first arg, because we can't actually reset to the 0'th argv */
argv[argc++] = NULL;
for (;;) {
linesz = sizeof(buf);
if (!io_read_line(sess, fd, buf, &linesz)) {
daemon_client_error(sess,
"protocol violation: expected option line");
errno = EINVAL;
if (argsb != NULL)
sbuf_delete(argsb);
if (reqsb != NULL)
sbuf_delete(reqsb);
return -1;
} else if (linesz == sizeof(buf)) {
daemon_client_error(sess, "line buffer overrun");
errno = EINVAL;
if (argsb != NULL)
sbuf_delete(argsb);
if (reqsb != NULL)
sbuf_delete(reqsb);
return -1;
} else if (linesz == 0) {
break;
}
/*
* XXX Glob.
*/
if (fargs) {
/*
* These get added to the request as-is, but they're
* added to RSYNC_ARG# with the module/ stripped in
* daemon_add_glob().
*/
if (reqsb != NULL) {
if (sbuf_len(reqsb) != 0)
sbuf_putc(reqsb, ' ');
sbuf_cat(reqsb, buf);
}
if (!daemon_add_glob(sess, module, &argc, &argv,
&argvsz, buf, argsb))
goto fail;
} else {
if (argsb != NULL) {
sbuf_cat(argsb, buf);
sbuf_putc(argsb, '\0');
}
if (!daemon_add_option(sess, &argc, &argv, &argvsz,
buf))
goto fail;
}
if (strcmp(buf, ".") == 0)
fargs = true;
}
if (role->prexfer_pipe != -1) {
const char *wargs, *wreq;
size_t wargsz;
wargs = wreq = NULL;
wargsz = 0;
if (sbuf_finish(argsb) == 0) {
wargs = sbuf_data(argsb);
wargsz = sbuf_len(argsb);
}
if (sbuf_finish(reqsb) == 0)
wreq = sbuf_data(reqsb);
daemon_finish_prexfer(sess, wreq, wargs, wargsz);
sbuf_delete(argsb);
sbuf_delete(reqsb);
}
*oargc = (int)argc;
*oargv = argv;
return 0;
fail:
if (argsb != NULL)
sbuf_delete(argsb);
if (reqsb != NULL)
sbuf_delete(reqsb);
if (role->prexfer_pipe != -1)
daemon_finish_prexfer(sess, NULL, NULL, 0);
for (size_t i = 0; i < argc; i++)
free(argv[i]);
free(argv);
return -1;
}
static int
daemon_reject(struct sess *sess, int shopt, const struct option *lopt)
{
struct daemon_role *role;
role = (void *)sess->role;
if (lopt != NULL && strcmp(lopt->name, "daemon") == 0) {
daemon_client_error(sess,
"protection error: --daemon sent as client option");
return 0;
}
/*
* Short options are quick, we just search the short opt string and
* refuse it if it's there. dameon_parse_refuse() adds the short option
* for each long option, so we don't need to fallback to searching the
* long options.
*/
if (role->refused.refused_shopts != NULL && shopt != 0) {
if (strchr(role->refused.refused_shopts, shopt) != NULL) {
daemon_client_error(sess, "option refused: -%c",
shopt);
return 0;
}
return 1;
}
if (role->refused.refused_lopts != NULL && lopt != NULL) {
const struct option * const *chkopt = role->refused.refused_lopts;
for (size_t i = 0; i < role->refused.refused_loptsz; i++) {
if (chkopt[i] == lopt) {
daemon_client_error(sess,
"option refused: --%s", lopt->name);
return 0;
}
}
}
return 1;
}
static int
daemon_write_motd(struct sess *sess, const char *motd_file, int outfd)
{
FILE *fp;
char *line;
size_t linesz;
ssize_t linelen;
int retval;
/* Errors largely ignored, maybe logged. */
if (motd_file[0] == '\0')
return 1;
line = NULL;
linesz = 0;
fp = fopen(motd_file, "r");
if (fp == NULL) {
/* XXX Log */
return 1;
}
retval = 1;
while ((linelen = getline(&line, &linesz, fp)) > 0) {
if (!io_write_buf(sess, outfd, line, linelen)) {
/* XXX Log */
retval = 0;
break;
}
}
fclose(fp);
free(line);
return retval;
}
#define AUTH_CHALLENGE_LENGTH 64 /* Arbitrary */
#if !HAVE_ARC4RANDOM
static void
daemon_auth_challenge_random(struct sess *sess, uint8_t *buf, size_t bufsz)
{
struct timeval tv;
struct daemon_role *role;
uint8_t *addrbuf, *pidbuf, *timebuf;
pid_t p;
role = (void *)sess->role;
p = getpid();
gettimeofday(&tv, NULL);
addrbuf = (uint8_t *)role->client_sa;
pidbuf = (uint8_t *)&p;
timebuf = (uint8_t *)&tv;
for (size_t i = 0; i < bufsz; i++) {
uint8_t curbyte = buf[i];
/*
* A combination of: stack garbage, some more numbers, a bit of
* address bits mixed in as well as the pid and time. This does
* not need to be perfectly random, it mostly needs to avoid
* replay attacks.
*/
curbyte ^= random();
curbyte ^= addrbuf[i % sizeof(role->client_sa)];
curbyte ^= pidbuf[i % sizeof(p)];
curbyte ^= timebuf[i % sizeof(tv)];
buf[i] = curbyte;
}
}
#endif
static void
daemon_auth_generate_challenge(struct sess *sess, char *challenge,
size_t challengesz)
{
char hashed_buf[AUTH_CHALLENGE_LENGTH + 4];
uint8_t buf[128];
#if HAVE_ARC4RANDOM
arc4random_buf(buf, sizeof(buf));
#else
daemon_auth_challenge_random(sess, buf, sizeof(buf));
#endif
/*
* hashed_buf is sized such that we should get AUTH_CHALLENGE_LENGTH
* worth of base64 characters, so it can (and probably will be)
* truncated but we can ignore that.
*/
(void)b64_ntop(buf, sizeof(buf), hashed_buf, sizeof(hashed_buf));
memcpy(challenge, hashed_buf, MIN(AUTH_CHALLENGE_LENGTH, challengesz));
}
static int
user_matches(const char *cfguser, const char *clientuser)
{
if (cfguser[0] == '@') {
struct group *grp;
/* System group */
cfguser++;
grp = getgrnam(cfguser);
if (grp == NULL)
return 0;
for (char **mem = grp->gr_mem; *mem != NULL; mem++) {
if (strcmp(*mem, clientuser) == 0)
return 1;
}
return 0;
}
return strcmp(cfguser, clientuser) == 0;
}
static int
secret_matches(FILE *secfp, const char *username, const char *group,
const char *challenge, const char *response)
{
char checkbuf[RSYNCD_CHALLENGE_RESPONSESZ];
char *line;
size_t linesz;
ssize_t linelen;
char *password;
int matched;
line = NULL;
linesz = 0;
matched = 0;
while ((linelen = getline(&line, &linesz, secfp)) > 0) {
while (isspace(line[linelen - 1]))
line[--linelen] = '\0';
if (linelen == 0 || line[0] == '#')
continue;
password = strchr(line, ':');
if (password == NULL)
continue;
*password = '\0';
password++;
if (strcmp(line, username) != 0 &&
(group == NULL || strcmp(line, group) != 0))
continue;
/* Try to match it; if hashing fails, we'll reject anyways. */
if (!rsync_password_hash(password, challenge, checkbuf,
sizeof(checkbuf))) {
ERRX1("rsync_password_hash");
continue;
}
if (strcmp(checkbuf, response) == 0) {
matched = 1;
break;
}
}
if (line != NULL)
explicit_bzero(line, linesz);
free(line);
return matched;
}
static int
daemon_auth_user(struct sess *sess, const char *module, const char *cfgusers,
FILE *secfp, const char *username, const char *challenge,
const char *response, int *read_only)
{
const char *delims;
char *users, *user, *setting, *strip;
int matched;
bool is_grp;
if (username[0] == '#') {
daemon_client_error(sess, "%s: bad username", module);
return 0;
}
users = strdup(cfgusers);
if (users == NULL) {
daemon_client_error(sess, "%s: out of memory", module);
return 0; /* Deny */
}
/*
* A comma first character forces us to split on commas so that an entry
* may contain spaces.
*/
if (users[0] == ',')
delims = ",";
else
delims = ", \t";
matched = 0;
setting = NULL;
while ((user = strsep(&users, delims)) != NULL) {
/* Trim any leading whitespace. */
while (isspace(*user))
user++;
if (*user == '\0')
continue;
/* Trim any trailing whitespace. */
strip = &user[strlen(user) - 1];
while (isspace(*strip)) {
*strip = '\0';
strip--;
assert(strip > user);
}
setting = strchr(user, ':');
if (setting != NULL) {
*setting = '\0';
setting++;
}
if (!user_matches(user, username))
continue;
/*
* We always stop at first match, but we can match either the
* user or group entry secret if that's the one we hit.
*/
is_grp = user[0] == '@';
if (!secret_matches(secfp, username, is_grp ? user : NULL,
challenge, response))
break;
if (setting != NULL && strcmp(setting, "deny") == 0)
break;
*read_only = -1;
matched = 1;
if (setting == NULL)
break;
if (strcmp(setting, "ro") == 0)
*read_only = 1;
else if (strcmp(setting, "rw") == 0)
*read_only = 0;
break;
}
free(users);
return matched;
}
static int
daemon_auth(struct sess *sess, const char *module, int *read_only)
{
char response[RSYNCD_MAXAUTHSZ];
char challenge[AUTH_CHALLENGE_LENGTH + 1];
struct daemon_role *role;
const char *secretsf, *users;
char *hash, *username;
FILE *secfp;
size_t linesz;
int rc, strict;
role = (void *)sess->role;
if (!cfg_has_param(role->dcfg, module, "auth users"))
return 1;
if (!cfg_has_param(role->dcfg, module, "secrets file")) {
daemon_client_error(sess, "%s: missing secrets file", module);
return 0;
}
rc = cfg_param_str(role->dcfg, module, "secrets file", &secretsf);
assert(rc == 0);
if (*secretsf == '\0') {
daemon_client_error(sess, "%s: missing secrets file", module);
return 0;
}
rc = cfg_param_str(role->dcfg, module, "auth users", &users);
assert(rc == 0);
if (cfg_param_bool(role->dcfg, module, "strict modes", &strict) != 0) {
daemon_client_error(sess, "%s: 'strict modes' invalid", module);
return 0;
}
secfp = fopen(secretsf, "r");
if (secfp == NULL) {
daemon_client_error(sess, "%s: could not open secrets file",
module);
return 0;
} else if (strict && !check_file_mode(secretsf, fileno(secfp))) {
fclose(secfp);
daemon_client_error(sess, "%s: bad permissions on secrets file",
module);
return 0;
}
memset(challenge, 0, sizeof(challenge));
daemon_auth_generate_challenge(sess, challenge, sizeof(challenge));
challenge[AUTH_CHALLENGE_LENGTH] = '\n';
if (!io_write_buf(sess, role->client, "@RSYNCD: AUTHREQD ",
sizeof("@RSYNCD: AUTHREQD ") - 1)) {
fclose(secfp);
ERR("io_write_buf");
return 0;
}
if (!io_write_buf(sess, role->client, challenge, sizeof(challenge))) {
fclose(secfp);
ERR("io_write_line");
return 0;
}
challenge[AUTH_CHALLENGE_LENGTH] = '\0';
linesz = sizeof(response);
if (!io_read_line(sess, role->client, response, &linesz)) {
fclose(secfp);
daemon_client_error(sess, "%s: expected auth response",
module);
return 0;
} else if (linesz == sizeof(response)) {
fclose(secfp);
daemon_client_error(sess, "%s: line buffer overflow on auth",
module);
return 0;
}
username = response;
hash = strchr(response, ' ');
if (hash == NULL) {
fclose(secfp);
daemon_client_error(sess, "%s: malformed auth response",
module);
return 0;
}
*hash = '\0';
hash++;
rc = daemon_auth_user(sess, module, users, secfp, username, challenge,
hash, read_only);
fclose(secfp);
if (rc) {
role->auth_user = strdup(username);
if (role->auth_user == NULL) {
daemon_client_error(sess, "%s: out of memory", module);
return 0;
}
}
return rc;
}
static int
daemon_extract_addr(struct sess *sess, struct sockaddr_storage *saddr,
size_t slen)
{
sa_family_t family = saddr->ss_family;
struct daemon_role *role;
void *addr;
role = (void *)sess->role;
assert(family == AF_INET || family == AF_INET6);
role->client_sa = (struct sockaddr *)saddr;
if (family == AF_INET) {
struct sockaddr_in *sin = (void *)saddr;
addr = &sin->sin_addr;
} else {
struct sockaddr_in6 *sin6 = (void *)saddr;
addr = &sin6->sin6_addr;
}
if (inet_ntop(family, addr, &role->client_addr[0],
sizeof(role->client_addr)) == NULL) {
ERR("inet_ntop");
return 0;
}
return 1;
}
static int
rsync_daemon_handler(struct sess *sess, int fd, struct sockaddr_storage *saddr,
socklen_t slen)
{
struct daemon_role *role;
struct opts *client_opts;
char **argv, *module, *motd_file;
int argc, flags, rc, use_chroot, user_read_only;
module = NULL;
argc = 0;
argv = NULL;
user_read_only = -1;
role = (void *)sess->role;
role->prexfer_pid = 0;
role->prexfer_pipe = -1;
role->client = fd;
assert(role->lockfd == -1);
motd_file = role->motd_file;
role->motd_file = NULL;
if (role->pidfp != NULL)
fclose(role->pidfp);
cfg_free(role->dcfg);
role->dcfg = NULL;
/* XXX These should perhaps log an error, but they are not fatal. */
(void)rsync_setsockopts(fd, "SO_KEEPALIVE");
(void)rsync_setsockopts(fd, sess->opts->sockopts);
if (!daemon_extract_addr(sess, saddr, slen))
return ERR_IPC;
sess->lver = sess->protocol = RSYNC_PROTOCOL;
cleanup_init(cleanup_ctx);
if ((flags = fcntl(fd, F_GETFL, 0)) == -1 ||
fcntl(fd, F_SETFL, flags | O_NONBLOCK) == -1) {
daemon_client_error(sess, "failed to set non-blocking");
return ERR_IPC;
}
role->dcfg = cfg_parse(sess, role->cfg_file, 1);
if (role->dcfg == NULL)
return ERR_IPC;
/* saddr == NULL only for inetd driven invocations. */
if (daemon_read_hello(sess, fd, &module) < 0)