/*

* Copyright (c) 1983, 1993

* The Regents of the University of California. All rights reserved.

*

* Redistribution and use in source and binary forms, with or without

* modification, are permitted provided that the following conditions

* are met:

* 1. Redistributions of source code must retain the above copyright

* notice, this list of conditions and the following disclaimer.

* 2. Redistributions in binary form must reproduce the above copyright

* notice, this list of conditions and the following disclaimer in the

* documentation and/or other materials provided with the distribution.

* 3. All advertising materials mentioning features or use of this software

* must display the following acknowledgement:

* This product includes software developed by the University of

* California, Berkeley and its contributors.

* 4. Neither the name of the University nor the names of its contributors

* may be used to endorse or promote products derived from this software

* without specific prior written permission.

*

* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND

* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE

* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE

* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE

* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL

* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS

* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)

* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT

* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY

* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF

* SUCH DAMAGE.

*

* 1999-02-22 Arkadiusz Miśkiewicz <misiek@pld.ORG.PL>

* - added Native Language Support

* Sun Mar 21 1999 - Arnaldo Carvalho de Melo <acme@conectiva.com.br>

* - fixed strerr(errno) in gettext calls

*/

#include <errno.h>

#include <limits.h>

#include <unistd.h>

#include <stdlib.h>

#include <sys/time.h>

#include <stdio.h>

#include <ctype.h>

#include <string.h>

#include <sys/types.h>

#include <sys/socket.h>

#include <sys/un.h>

#include <arpa/inet.h>

#include <netdb.h>

#include <getopt.h>

#include <pwd.h>

#include <signal.h>

#include <sys/uio.h>

#include "all-io.h"

#include "c.h"

#include "closestream.h"

#include "nls.h"

#include "pathnames.h"

#include "strutils.h"

#include "xalloc.h"

#include "strv.h"

#include "list.h"

#include "pwdutils.h"

#define SYSLOG_NAMES

#include <syslog.h>

#ifdef HAVE_LIBSYSTEMD

# define SD_JOURNAL_SUPPRESS_LOCATION

# include <systemd/sd-daemon.h>

# include <systemd/sd-journal.h>

#endif

#ifdef HAVE_SYS_TIMEX_H

# include <sys/timex.h>

#endif

enum {

TYPE_UDP = (1 << 1),

TYPE_TCP = (1 << 2),

ALL_TYPES = TYPE_UDP | TYPE_TCP

};

enum {

AF_UNIX_ERRORS_OFF = 0,

AF_UNIX_ERRORS_ON,

AF_UNIX_ERRORS_AUTO

};

enum {

OPT_PRIO_PREFIX = CHAR_MAX + 1,

OPT_JOURNALD,

OPT_RFC3164,

OPT_RFC5424,

OPT_SOCKET_ERRORS,

OPT_MSGID,

OPT_NOACT,

OPT_ID,

OPT_STRUCTURED_DATA_ID,

OPT_STRUCTURED_DATA_PARAM,

OPT_OCTET_COUNT

};

/* rfc5424 structured data */

struct structured_data {

char *id; /* SD-ID */

char **params; /* array with SD-PARAMs */

struct list_head sds;

};

struct logger_ctl {

int fd;

int pri;

pid_t pid; /* zero when unwanted */

char *hdr; /* the syslog header (based on protocol) */

char const *tag;

char *login;

char *msgid;

char *unix_socket; /* -u <path> or default to _PATH_DEVLOG */

char *server;

char *port;

int socket_type;

size_t max_message_size;

struct list_head user_sds; /* user defined rfc5424 structured data */

struct list_head reserved_sds; /* standard rfc5424 structured data */

void (*syslogfp)(struct logger_ctl *ctl);

unsigned int

unix_socket_errors:1, /* whether to report or not errors */

noact:1, /* do not write to sockets */

prio_prefix:1, /* read priority from input */

stderr_printout:1, /* output message to stderr */

rfc5424_time:1, /* include time stamp */

rfc5424_tq:1, /* include time quality markup */

rfc5424_host:1, /* include hostname */

skip_empty_lines:1, /* do not send empty lines when processing files */

octet_count:1; /* use RFC6587 octet counting */

};

#define is_connected(_ctl) ((_ctl)->fd >= 0)

static void logger_reopen(struct logger_ctl *ctl);

/*

* For tests we want to be able to control datetime outputs

*/

#ifdef TEST_LOGGER

static inline int logger_gettimeofday(struct timeval *tv, struct timezone *tz)

{

char *str = getenv("LOGGER_TEST_TIMEOFDAY");

uintmax_t sec, usec;

if (str && sscanf(str, "%ju.%ju", &sec, &usec) == 2) {

tv->tv_sec = sec;

tv->tv_usec = usec;

return tv->tv_sec >= 0 && tv->tv_usec >= 0 ? 0 : -EINVAL;

}

return gettimeofday(tv, tz);

}

static inline char *logger_xgethostname(void)

{

char *str = getenv("LOGGER_TEST_HOSTNAME");

return str ? xstrdup(str) : xgethostname();

}

static inline pid_t logger_getpid(void)

{

char *str = getenv("LOGGER_TEST_GETPID");

unsigned int pid;

if (str && sscanf(str, "%u", &pid) == 1)

return pid;

return getpid();

}

#undef HAVE_NTP_GETTIME /* force to default non-NTP */

#else /* !TEST_LOGGER */

# define logger_gettimeofday(x, y) gettimeofday(x, y)

# define logger_xgethostname xgethostname

# define logger_getpid getpid

#endif

static int decode(const char *name, const CODE *codetab)

{

register const CODE *c;

if (name == NULL || *name == '\0')

return -1;

if (isdigit(*name)) {

int num;

char *end = NULL;

errno = 0;

num = strtol(name, &end, 10);

if (errno || name == end || (end && *end))

return -1;

for (c = codetab; c->c_name; c++)

if (num == c->c_val)

return num;

return -1;

}

for (c = codetab; c->c_name; c++)

if (!strcasecmp(name, c->c_name))

return (c->c_val);

return -1;

}

static int pencode(char *s)

{

int facility, level;

char *separator;

assert(s);

separator = strchr(s, '.');

if (separator) {

*separator = '\0';

facility = decode(s, facilitynames);

if (facility < 0)

errx(EXIT_FAILURE, _("unknown facility name: %s"), s);

s = ++separator;

} else

facility = LOG_USER;

level = decode(s, prioritynames);

if (level < 0)

errx(EXIT_FAILURE, _("unknown priority name: %s"), s);

if (facility == LOG_KERN)

facility = LOG_USER; /* kern is forbidden */

return ((level & LOG_PRIMASK) | (facility & LOG_FACMASK));

}

static int unix_socket(struct logger_ctl *ctl, const char *path, int *socket_type)

{

int fd = -1, i, type = -1;

static struct sockaddr_un s_addr; /* AF_UNIX address of local logger */

if (strlen(path) >= sizeof(s_addr.sun_path))

errx(EXIT_FAILURE, _("openlog %s: pathname too long"), path);

s_addr.sun_family = AF_UNIX;

strcpy(s_addr.sun_path, path);

for (i = 2; i; i--) {

int st = -1;

if (i == 2 && *socket_type & TYPE_UDP) {

st = SOCK_DGRAM;

type = TYPE_UDP;

}

if (i == 1 && *socket_type & TYPE_TCP) {

st = SOCK_STREAM;

type = TYPE_TCP;

}

if (st == -1 || (fd = socket(AF_UNIX, st, 0)) == -1)

continue;

if (connect(fd, (struct sockaddr *)&s_addr, sizeof(s_addr)) == -1) {

close(fd);

continue;

}

break;

}

if (i == 0) {

if (ctl->unix_socket_errors)

err(EXIT_FAILURE, _("socket %s"), path);

/* write_output() will try to reconnect */

return -1;

}

/* replace ALL_TYPES with the real TYPE_* */

if (type > 0 && type != *socket_type)

*socket_type = type;

return fd;

}

static int inet_socket(const char *servername, const char *port, int *socket_type)

{

int fd, errcode, i, type = -1;

struct addrinfo hints, *res;

const char *p = port;

for (i = 2; i; i--) {

memset(&hints, 0, sizeof(hints));

if (i == 2 && *socket_type & TYPE_UDP) {

hints.ai_socktype = SOCK_DGRAM;

type = TYPE_UDP;

if (port == NULL)

p = "syslog";

}

if (i == 1 && *socket_type & TYPE_TCP) {

hints.ai_socktype = SOCK_STREAM;

type = TYPE_TCP;

if (port == NULL)

p = "syslog-conn";

}

if (hints.ai_socktype == 0)

continue;

hints.ai_family = AF_UNSPEC;

errcode = getaddrinfo(servername, p, &hints, &res);

if (errcode != 0)

errx(EXIT_FAILURE, _("failed to resolve name %s port %s: %s"),

servername, p, gai_strerror(errcode));

if ((fd = socket(res->ai_family, res->ai_socktype, res->ai_protocol)) == -1) {

freeaddrinfo(res);

continue;

}

if (connect(fd, res->ai_addr, res->ai_addrlen) == -1) {

freeaddrinfo(res);

close(fd);

continue;

}

freeaddrinfo(res);

break;

}

if (i == 0)

errx(EXIT_FAILURE, _("failed to connect to %s port %s"), servername, p);

/* replace ALL_TYPES with the real TYPE_* */

if (type > 0 && type != *socket_type)

*socket_type = type;

return fd;

}

#ifdef HAVE_LIBSYSTEMD

static int journald_entry(struct logger_ctl *ctl, FILE *fp)

{

struct iovec *iovec;

char *buf = NULL;

ssize_t sz;

int n, lines = 0, vectors = 8, ret = 0, msgline = -1;

size_t dummy = 0;

iovec = xmalloc(vectors * sizeof(struct iovec));

while (1) {

buf = NULL;

sz = getline(&buf, &dummy, fp);

if (sz == -1 ||

(sz = rtrim_whitespace((unsigned char *) buf)) == 0) {

free(buf);

break;

}

if (strncmp(buf, "MESSAGE=", 8) == 0) {

if (msgline == -1)

msgline = lines; /* remember the first message */

else {

char *p = xrealloc(iovec[msgline].iov_base,

iovec[msgline].iov_len + sz - 8 + 2);

iovec[msgline].iov_base = p;

p += iovec[msgline].iov_len;

*p++ = '\n';

memcpy(p, buf + 8, sz - 8);

free(buf);

iovec[msgline].iov_len += sz - 8 + 1;

continue;

}

}

if (lines == vectors) {

vectors *= 2;

if (IOV_MAX < vectors)

errx(EXIT_FAILURE, _("maximum input lines (%d) exceeded"), IOV_MAX);

iovec = xrealloc(iovec, vectors * sizeof(struct iovec));

}

iovec[lines].iov_base = buf;

iovec[lines].iov_len = sz;

++lines;

}

if (!ctl->noact)

ret = sd_journal_sendv(iovec, lines);

if (ctl->stderr_printout) {

for (n = 0; n < lines; n++)

fprintf(stderr, "%s\n", (char *) iovec[n].iov_base);

}

for (n = 0; n < lines; n++)

free(iovec[n].iov_base);

free(iovec);

return ret;

}

#endif

/* this creates a timestamp based on current time according to the

* fine rules of RFC3164, most importantly it ensures in a portable

* way that the month day is correctly written (with a SP instead

* of a leading 0). The function uses a static buffer which is

* overwritten on the next call (just like ctime() does).

*/

static char const *rfc3164_current_time(void)

{

static char time[32];

struct timeval tv;

struct tm tm;

static char const * const monthnames[] = {

"Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug",

"Sep", "Oct", "Nov", "Dec"

};

logger_gettimeofday(&tv, NULL);

localtime_r(&tv.tv_sec, &tm);

snprintf(time, sizeof(time),"%s %2d %2.2d:%2.2d:%2.2d",

monthnames[tm.tm_mon], tm.tm_mday,

tm.tm_hour, tm.tm_min, tm.tm_sec);

return time;

}

#define next_iovec(ary, idx) __extension__ ({ \

assert(ARRAY_SIZE(ary) > (size_t)idx); \

assert(idx >= 0); \

&ary[idx++]; \

})

#define iovec_add_string(ary, idx, str, len) \

do { \

struct iovec *v = next_iovec(ary, idx); \

v->iov_base = (void *) str; \

v->iov_len = len ? len : strlen(str); \

} while (0)

#define iovec_memcmp(ary, idx, str, len) \

memcmp((ary)[(idx) - 1].iov_base, str, len)

/* writes generated buffer to desired destination. For TCP syslog,

* we use RFC6587 octet-stuffing (unless octet-counting is selected).

* This is not great, but doing full blown RFC5425 (TLS) looks like

* it is too much for the logger utility. If octet-counting is

* selected, we use that.

*/

static void write_output(struct logger_ctl *ctl, const char *const msg)

{

struct iovec iov[4];

int iovlen = 0;

char *octet = NULL;

/* initial connect failed? */

if (!ctl->noact && !is_connected(ctl))

logger_reopen(ctl);

/* 1) octen count */

if (ctl->octet_count) {

size_t len = xasprintf(&octet, "%zu ", strlen(ctl->hdr) + strlen(msg));

iovec_add_string(iov, iovlen, octet, len);

}

/* 2) header */

iovec_add_string(iov, iovlen, ctl->hdr, 0);

/* 3) message */

iovec_add_string(iov, iovlen, msg, 0);

if (!ctl->noact && is_connected(ctl)) {

struct msghdr message = { 0 };

#ifdef SCM_CREDENTIALS

struct cmsghdr *cmhp;

struct ucred *cred;

union {

struct cmsghdr cmh;

char control[CMSG_SPACE(sizeof(struct ucred))];

} cbuf = { .control = { 0 } };

#endif

/* 4) add extra \n to make sure message is terminated */

if ((ctl->socket_type == TYPE_TCP) && !ctl->octet_count)

iovec_add_string(iov, iovlen, "\n", 1);

message.msg_iov = iov;

message.msg_iovlen = iovlen;

#ifdef SCM_CREDENTIALS

/* syslog/journald may follow local socket credentials rather

* than in the message PID. If we use --id as root than we can

* force kernel to accept another valid PID than the real logger(1)

* PID.

*/

if (ctl->pid && !ctl->server && ctl->pid != getpid()

&& geteuid() == 0 && kill(ctl->pid, 0) == 0) {

message.msg_control = cbuf.control;

message.msg_controllen = CMSG_SPACE(sizeof(struct ucred));

cmhp = CMSG_FIRSTHDR(&message);

cmhp->cmsg_len = CMSG_LEN(sizeof(struct ucred));

cmhp->cmsg_level = SOL_SOCKET;

cmhp->cmsg_type = SCM_CREDENTIALS;

cred = (struct ucred *) CMSG_DATA(cmhp);

cred->pid = ctl->pid;

}

#endif

/* Note that logger(1) maybe executed for long time (as pipe

* reader) and connection endpoint (syslogd) may be restarted.

*

* The libc syslog() function reconnects on failed send().

* Let's do the same to be robust. [kzak -- Oct 2017]

*

* MSG_NOSIGNAL is POSIX.1-2008 compatible, but it for example

* not supported by apple-darwin15.6.0.

*/

#ifndef MSG_NOSIGNAL

# define MSG_NOSIGNAL 0

#endif

if (sendmsg(ctl->fd, &message, MSG_NOSIGNAL) < 0) {

logger_reopen(ctl);

if (sendmsg(ctl->fd, &message, MSG_NOSIGNAL) < 0)

warn(_("send message failed"));

}

}

if (ctl->stderr_printout) {

/* make sure it's terminated for stderr */

if (iovec_memcmp(iov, iovlen, "\n", 1) != 0)

iovec_add_string(iov, iovlen, "\n", 1);

ignore_result( writev(STDERR_FILENO, iov, iovlen) );

}

free(octet);

}

#define NILVALUE "-"

static void syslog_rfc3164_header(struct logger_ctl *const ctl)

{

char pid[30], *hostname;

*pid = '\0';

if (ctl->pid)

snprintf(pid, sizeof(pid), "[%d]", ctl->pid);

if ((hostname = logger_xgethostname())) {

char *dot = strchr(hostname, '.');

if (dot)

*dot = '\0';

} else

hostname = xstrdup(NILVALUE);

xasprintf(&ctl->hdr, "<%d>%.15s %s %.200s%s: ",

ctl->pri, rfc3164_current_time(), hostname, ctl->tag, pid);

free(hostname);

}

static inline struct list_head *get_user_structured_data(struct logger_ctl *ctl)

{

return &ctl->user_sds;

}

static inline struct list_head *get_reserved_structured_data(struct logger_ctl *ctl)

{

return &ctl->reserved_sds;

}

static int has_structured_data_id(struct list_head *ls, const char *id)

{

struct list_head *p;

if (!ls || list_empty(ls))

return 0;

list_for_each(p, ls) {

struct structured_data *sd = list_entry(p, struct structured_data, sds);

if (sd->id && strcmp(sd->id, id) == 0)

return 1;

}

return 0;

}

static void add_structured_data_id(struct list_head *ls, const char *id)

{

struct structured_data *sd;

assert(id);

if (has_structured_data_id(ls, id))

errx(EXIT_FAILURE, _("structured data ID '%s' is not unique"), id);

sd = xcalloc(1, sizeof(*sd));

INIT_LIST_HEAD(&sd->sds);

sd->id = xstrdup(id);

list_add_tail(&sd->sds, ls);

}

static void add_structured_data_param(struct list_head *ls, const char *param)

{

struct structured_data *sd;

if (list_empty(ls))

errx(EXIT_FAILURE, _("--sd-id was not specified for --sd-param %s"), param);

assert(param);

sd = list_last_entry(ls, struct structured_data, sds);

if (strv_extend(&sd->params, param))

err_oom();

}

static void __attribute__ ((__format__ (__printf__, 2, 3)))

add_structured_data_paramf(struct list_head *ls, const char *fmt, ...)

{

struct structured_data *sd;

va_list ap;

int x;

assert(!list_empty(ls));

assert(fmt);

sd = list_last_entry(ls, struct structured_data, sds);

va_start(ap, fmt);

x = strv_extendv(&sd->params, fmt, ap);

va_end(ap);

if (x)

err_oom();

}

static char *strdup_structured_data(struct structured_data *sd)

{

char *res, *tmp;

if (strv_isempty(sd->params))

return NULL;

xasprintf(&res, "[%s %s]", sd->id,

(tmp = strv_join(sd->params, " ")));

free(tmp);

return res;

}

static char *strdup_structured_data_list(struct list_head *ls)

{

struct list_head *p;

char *res = NULL;

list_for_each(p, ls) {

struct structured_data *sd = list_entry(p, struct structured_data, sds);

char *one = strdup_structured_data(sd);

char *tmp = res;

if (!one)

continue;

res = strconcat(tmp, one);

free(tmp);

free(one);

}

return res;

}

static char *get_structured_data_string(struct logger_ctl *ctl)

{

char *sys = NULL, *usr = NULL, *res;

if (!list_empty(&ctl->reserved_sds))

sys = strdup_structured_data_list(&ctl->reserved_sds);

if (!list_empty(&ctl->user_sds))

usr = strdup_structured_data_list(&ctl->user_sds);

if (sys && usr) {

res = strconcat(sys, usr);

free(sys);

free(usr);

} else

res = sys ? sys : usr;

return res;

}

static int valid_structured_data_param(const char *str)

{

char *s;

char *eq = strchr(str, '='),

*qm1 = strchr(str, '"'),

*qm2 = qm1 ? ul_strchr_escaped(qm1 + 1, '"') : NULL;

/* something is missing */

if (!eq || !qm1 || !qm2)

return 0;

/* ']' need to be escaped */

for (s = qm1 + 1; s && *s; ) {

char *p = strchr(s, ']');

if (!p)

break;

if (p > qm2 || p == ul_strchr_escaped(s, ']'))

return 0;

s = p + 1;

}

/* '\' is allowed only before '[]"\' chars */

for (s = qm1 + 1; s && *s; ) {

char *p = strchr(s, '\\');

if (!p)

break;

if (!strchr("[]\"\\", *(p + 1)))

return 0;

s = p + 1;

if (*s == '\\')

s++;

}

/* foo="bar" */

return eq > str && eq < qm1 && eq + 1 == qm1 && qm1 < qm2 && *(qm2 + 1) == '\0';

}

/* SD-ID format:

* name@<private enterprise number>, e.g., "ourSDID@32473"

*/

static int valid_structured_data_id(const char *str)

{

char *at = strchr(str, '@');

const char *p;

/* standardized IDs without @<digits> */

if (!at && (strcmp(str, "timeQuality") == 0 ||

strcmp(str, "origin") == 0 ||

strcmp(str, "meta") == 0))

return 1;

if (!at || at == str || !*(at + 1))

return 0;

/* <digits> or <digits>.<digits>[...] */

for (p = at + 1; p && *p; p++) {

const char *end;

if (isdigit_strend(p, &end))

break; /* only digits in the string */

if (end == NULL || end == p ||

*end != '.' || *(end + 1) == '\0')

return 0;

p = end;

}

/* check for forbidden chars in the <name> */

for (p = str; p < at; p++) {

if (*p == '[' || *p == '=' || *p == '"' || *p == '@')

return 0;

if (isblank((unsigned char) *p) || iscntrl((unsigned char) *p))

return 0;

}

return 1;

}

/* Some field mappings may be controversial, thus I give the reason

* why this specific mapping was used:

* APP-NAME <-- tag

* Some may argue that "logger" is a better fit, but we think

* this is better inline of what other implementations do. In

* rsyslog, for example, the TAG value is populated from APP-NAME.

* PROCID <-- pid

* This is a relatively straightforward interpretation from

* RFC5424, sect. 6.2.6.

* MSGID <-- msgid (from --msgid)

* One may argue that the string "logger" would be better suited

* here so that a receiver can identify the sender process.

* However, this does not sound like a good match to RFC5424,

* sect. 6.2.7.

* Note that appendix A.1 of RFC5424 does not provide clear guidance

* of how these fields should be used. This is the case because the

* IETF working group couldn't arrive at a clear agreement when we

* specified RFC5424. The rest of the field mappings should be

* pretty clear from RFC5424. -- Rainer Gerhards, 2015-03-10

*/

static void syslog_rfc5424_header(struct logger_ctl *const ctl)

{

char *time;

char *hostname;

char const *app_name = ctl->tag;

char *procid;

char *const msgid = xstrdup(ctl->msgid ? ctl->msgid : NILVALUE);

char *structured = NULL;

struct list_head *sd;

if (ctl->rfc5424_time) {

struct timeval tv;

struct tm tm;

logger_gettimeofday(&tv, NULL);

if (localtime_r(&tv.tv_sec, &tm) != NULL) {

char fmt[64];

const size_t i = strftime(fmt, sizeof(fmt),

"%Y-%m-%dT%H:%M:%S.%%06u%z ", &tm);

/* patch TZ info to comply with RFC3339 (we left SP at end) */

fmt[i - 1] = fmt[i - 2];

fmt[i - 2] = fmt[i - 3];

fmt[i - 3] = ':';

xasprintf(&time, fmt, tv.tv_usec);

} else

err(EXIT_FAILURE, _("localtime() failed"));

} else

time = xstrdup(NILVALUE);

if (ctl->rfc5424_host) {

if (!(hostname = logger_xgethostname()))

hostname = xstrdup(NILVALUE);

/* Arbitrary looking 'if (var < strlen()) checks originate from

* RFC 5424 - 6 Syslog Message Format definition. */

if (255 < strlen(hostname))

errx(EXIT_FAILURE, _("hostname '%s' is too long"),

hostname);

} else

hostname = xstrdup(NILVALUE);

if (48 < strlen(ctl->tag))

errx(EXIT_FAILURE, _("tag '%s' is too long"), ctl->tag);

if (ctl->pid)

xasprintf(&procid, "%d", ctl->pid);

else

procid = xstrdup(NILVALUE);

sd = get_reserved_structured_data(ctl);

/* time quality structured data (maybe overwritten by --sd-id timeQuality) */

if (ctl->rfc5424_tq && !has_structured_data_id(sd, "timeQuality")) {

add_structured_data_id(sd, "timeQuality");

add_structured_data_param(sd, "tzKnown=\"1\"");

#ifdef HAVE_NTP_GETTIME

struct ntptimeval ntptv;

if (ntp_gettime(&ntptv) == TIME_OK) {

add_structured_data_param(sd, "isSynced=\"1\"");

add_structured_data_paramf(sd, "syncAccuracy=\"%ld\"", ntptv.maxerror);

} else

#endif

add_structured_data_paramf(sd, "isSynced=\"0\"");

}

/* convert all structured data to string */

structured = get_structured_data_string(ctl);

if (!structured)

structured = xstrdup(NILVALUE);

xasprintf(&ctl->hdr, "<%d>1 %s %s %s %s %s %s ",

ctl->pri,

time,

hostname,

app_name,

procid,

msgid,

structured);

free(time);

free(hostname);

/* app_name points to ctl->tag, do NOT free! */

free(procid);

free(msgid);

free(structured);

}

static void parse_rfc5424_flags(struct logger_ctl *ctl, char *s)

{

char *in, *tok;

in = s;

while ((tok = strtok(in, ","))) {

in = NULL;

if (!strcmp(tok, "notime")) {

ctl->rfc5424_time = 0;

ctl->rfc5424_tq = 0;

} else if (!strcmp(tok, "notq"))

ctl->rfc5424_tq = 0;

else if (!strcmp(tok, "nohost"))

ctl->rfc5424_host = 0;

else

warnx(_("ignoring unknown option argument: %s"), tok);

}

}

static int parse_unix_socket_errors_flags(char *s)

{

if (!strcmp(s, "off"))

return AF_UNIX_ERRORS_OFF;

if (!strcmp(s, "on"))

return AF_UNIX_ERRORS_ON;

if (!strcmp(s, "auto"))

return AF_UNIX_ERRORS_AUTO;

warnx(_("invalid argument: %s: using automatic errors"), s);

return AF_UNIX_ERRORS_AUTO;

}

static void syslog_local_header(struct logger_ctl *const ctl)

{

char pid[32];

if (ctl->pid)

snprintf(pid, sizeof(pid), "[%d]", ctl->pid);

else

pid[0] = '\0';

xasprintf(&ctl->hdr, "<%d>%s %s%s: ", ctl->pri, rfc3164_current_time(),

ctl->tag, pid);

}

static void generate_syslog_header(struct logger_ctl *const ctl)

{

free(ctl->hdr);

ctl->hdr = NULL;

ctl->syslogfp(ctl);

}

/* just open, nothing else */

static void __logger_open(struct logger_ctl *ctl)

{

if (ctl->server) {

ctl->fd = inet_socket(ctl->server, ctl->port, &ctl->socket_type);

} else {

if (!ctl->unix_socket)

ctl->unix_socket = _PATH_DEVLOG;

ctl->fd = unix_socket(ctl, ctl->unix_socket, &ctl->socket_type);

}

}

/* open and initialize relevant @ctl tuff */

static void logger_open(struct logger_ctl *ctl)

{

__logger_open(ctl);

if (!ctl->syslogfp)

ctl->syslogfp = ctl->server ? syslog_rfc5424_header :

syslog_local_header;

if (!ctl->tag)

ctl->tag = ctl->login = xgetlogin();

if (!ctl->tag)

ctl->tag = "<someone>";

}

/* re-open; usually after failed connection */

static void logger_reopen(struct logger_ctl *ctl)

{

if (ctl->fd != -1)

close(ctl->fd);

ctl->fd = -1;

__logger_open(ctl);

}

static void logger_command_line(struct logger_ctl *ctl, char **argv)

{

/* note: we never re-generate the syslog header here, even if we

* generate multiple messages. If so, we think it is the right thing

* to do to report them with the same timestamp, as the user actually

* intended to send a single message.

*/

char *const buf = xmalloc(ctl->max_message_size + 1);

char *p = buf;

const char *endp = buf + ctl->max_message_size - 1;

size_t len;

while (*argv) {

len = strlen(*argv);

if (endp < p + len && p != buf) {

write_output(ctl, buf);

p = buf;

}

if (ctl->max_message_size < len) {

(*argv)[ctl->max_message_size] = '\0'; /* truncate */

write_output(ctl, *argv++);

continue;

}

if (p != buf)

*p++ = ' ';

memmove(p, *argv++, len);

*(p += len) = '\0';

}

if (p != buf)

write_output(ctl, buf);

free(buf);

}

static void logger_stdin(struct logger_ctl *ctl)

{

/* note: we re-generate the syslog header for each log message to

* update header timestamps and to reflect possible priority changes.

*/

int default_priority = ctl->pri;

char *buf = xmalloc(ctl->max_message_size + 2 + 2);

int pri;