[secnet] / log.c

#include "secnet.h"
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <time.h>
#include <errno.h>
#include <syslog.h>
#include <assert.h>
#include <unistd.h>
#include "process.h"
#include "util.h"

bool_t secnet_is_daemon=False;
uint32_t message_level=M_WARNING|M_ERR|M_SECURITY|M_FATAL;
struct log_if *system_log=NULL;

static void vMessageFallback(uint32_t class, const char *message, va_list args)
{
    FILE *dest=stdout;
    /* Messages go to stdout/stderr */
    if (class & message_level) {
	if (class&M_FATAL || class&M_ERR || class&M_WARNING) {
	    dest=stderr;
	}
	vfprintf(dest,message,args);
    }
}

static void vMessage(uint32_t class, const char *message, va_list args)
{
#define MESSAGE_BUFLEN 1023
    static char buff[MESSAGE_BUFLEN+1]={0,};
    size_t bp;
    char *nlp;

    if (system_log) {
	/* Messages go to the system log interface */
	bp=strlen(buff);
	assert(bp < MESSAGE_BUFLEN);
	vsnprintf(buff+bp,MESSAGE_BUFLEN-bp,message,args);
	buff[sizeof(buff)-2] = '\n';
	buff[sizeof(buff)-1] = '\0';
	/* Each line is sent separately */
	while ((nlp=strchr(buff,'\n'))) {
	    *nlp=0;
	    slilog(system_log,class,"%s",buff);
	    memmove(buff,nlp+1,strlen(nlp+1)+1);
	}
    } else {
	vMessageFallback(class,message,args);
    }
}  

void Message(uint32_t class, const char *message, ...)
{
    va_list ap;

    va_start(ap,message);
    vMessage(class,message,ap);
    va_end(ap);
}

static void MessageFallback(uint32_t class, const char *message, ...)
{
    va_list ap;

    va_start(ap,message);
    vMessageFallback(class,message,ap);
    va_end(ap);
}

static NORETURN(vfatal(int status, bool_t perror, const char *message,
		       va_list args));

static void vfatal(int status, bool_t perror, const char *message,
		   va_list args)
{
    int err;

    err=errno;

    enter_phase(PHASE_SHUTDOWN);
    Message(M_FATAL, "secnet fatal error: ");
    vMessage(M_FATAL, message, args);
    if (perror)
	Message(M_FATAL, ": %s\n",strerror(err));
    else
	Message(M_FATAL, "\n");
    exit(status);
}

void fatal(const char *message, ...)
{
    va_list args;
    va_start(args,message);
    vfatal(current_phase,False,message,args);
    va_end(args);
}

void fatal_status(int status, const char *message, ...)
{
    va_list args;
    va_start(args,message);
    vfatal(status,False,message,args);
    va_end(args);
}

void fatal_perror(const char *message, ...)
{
    va_list args;
    va_start(args,message);
    vfatal(current_phase,True,message,args);
    va_end(args);
}

void fatal_perror_status(int status, const char *message, ...)
{
    va_list args;
    va_start(args,message);
    vfatal(status,True,message,args);
    va_end(args);
}

void vcfgfatal_maybefile(FILE *maybe_f /* or 0 */, struct cloc loc,
			 cstring_t facility, const char *message, va_list args)
{
    enter_phase(PHASE_SHUTDOWN);

    if (maybe_f && ferror(maybe_f)) {
	assert(loc.file);
	Message(M_FATAL, "error reading config file (%s, %s): %s",
		facility, loc.file, strerror(errno));
    } else if (maybe_f && feof(maybe_f)) {
	assert(loc.file);
	Message(M_FATAL, "unexpected end of config file (%s, %s)",
		facility, loc.file);
    } else if (loc.file && loc.line) {
	Message(M_FATAL, "config error (%s, %s:%d): ",facility,loc.file,
		loc.line);
    } else if (!loc.file && loc.line) {
	Message(M_FATAL, "config error (%s, line %d): ",facility,loc.line);
    } else {
	Message(M_FATAL, "config error (%s): ",facility);
    }
    
    vMessage(M_FATAL,message,args);
    exit(current_phase);
}

void cfgfatal_maybefile(FILE *maybe_f, struct cloc loc, cstring_t facility,
			const char *message, ...)
{
    va_list args;

    va_start(args,message);
    vcfgfatal_maybefile(maybe_f,loc,facility,message,args);
    va_end(args);
}    

void cfgfatal(struct cloc loc, cstring_t facility, const char *message, ...)
{
    va_list args;

    va_start(args,message);
    vcfgfatal_maybefile(0,loc,facility,message,args);
    va_end(args);
}

void cfgfile_postreadcheck(struct cloc loc, FILE *f)
{
    assert(loc.file);
    if (ferror(f)) {
	Message(M_FATAL, "error reading config file (%s): %s\n",
		loc.file, strerror(errno));
	exit(current_phase);
    } else if (feof(f)) {
	Message(M_FATAL, "unexpected end of config file (%s)\n", loc.file);
	exit(current_phase);
    }
}

/* Take a list of log closures and merge them */
struct loglist {
    struct log_if *l;
    struct loglist *next;
};

static void log_vmulti(void *sst, int class, const char *message, va_list args)
{
    struct loglist *st=sst, *i;

    if (secnet_is_daemon) {
	for (i=st; i; i=i->next) {
	    i->l->vlog(i->l->st,class,message,args);
	}
    } else {
	vMessage(class,message,args);
	Message(class,"\n");
    }
}

static void log_multi(void *st, int priority, const char *message, ...)
{
    va_list ap;

    va_start(ap,message);
    log_vmulti(st,priority,message,ap);
    va_end(ap);
}

struct log_if *init_log(list_t *ll)
{
    int i=0;
    item_t *item;
    closure_t *cl;
    struct loglist *l=NULL, *n;
    struct log_if *r;

    if (list_length(ll)==1) {
	item=list_elem(ll,0);
	cl=item->data.closure;
	if (cl->type!=CL_LOG) {
	    cfgfatal(item->loc,"init_log","closure is not a logger");
	}
	return cl->interface;
    }
    while ((item=list_elem(ll,i++))) {
	if (item->type!=t_closure) {
	    cfgfatal(item->loc,"init_log","item is not a closure");
	}
	cl=item->data.closure;
	if (cl->type!=CL_LOG) {
	    cfgfatal(item->loc,"init_log","closure is not a logger");
	}
	n=safe_malloc(sizeof(*n),"init_log");
	n->l=cl->interface;
	n->next=l;
	l=n;
    }
    if (!l) {
	fatal("init_log: no log");
    }
    r=safe_malloc(sizeof(*r), "init_log");
    r->st=l;
    r->log=log_multi;
    r->vlog=log_vmulti;
    return r;
}

struct logfile {
    closure_t cl;
    struct log_if ops;
    struct cloc loc;
    string_t logfile;
    uint32_t level;
    FILE *f;
};

static cstring_t months[]={
    "Jan","Feb","Mar","Apr","May","Jun","Jul","Aug","Sep","Oct","Nov","Dec"};

static void logfile_vlog(void *sst, int class, const char *message,
			 va_list args)
{
    struct logfile *st=sst;
    time_t t;
    struct tm *tm;

    if (secnet_is_daemon && st->f) {
	if (class&st->level) {
	    t=time(NULL);
	    tm=localtime(&t);
	    fprintf(st->f,"%s %2d %02d:%02d:%02d ",
		    months[tm->tm_mon],tm->tm_mday,tm->tm_hour,tm->tm_min,
		    tm->tm_sec);
	    vfprintf(st->f,message,args);
	    fprintf(st->f,"\n");
	    fflush(st->f);
	}
    } else {
	vMessageFallback(class,message,args);
	MessageFallback(class,"\n");
    }
}

static void logfile_log(void *state, int class, const char *message, ...)
{
    va_list ap;

    va_start(ap,message);
    logfile_vlog(state,class,message,ap);
    va_end(ap);
}

static void logfile_hup_notify(void *sst, int signum)
{
    struct logfile *st=sst;
    FILE *f;
    f=fopen(st->logfile,"a");
    if (!f) {
	logfile_log(st,M_FATAL,"received SIGHUP, but could not reopen "
		    "logfile: %s",strerror(errno));
    } else {
	fclose(st->f);
	st->f=f;
	logfile_log(st,M_INFO,"received SIGHUP");
    }
}

static void logfile_phase_hook(void *sst, uint32_t new_phase)
{
    struct logfile *st=sst;
    FILE *f;

    if (background) {
	f=fopen(st->logfile,"a");
	if (!f) fatal_perror("logfile (%s:%d): cannot open \"%s\"",
			     st->loc.file,st->loc.line,st->logfile);
	st->f=f;
	request_signal_notification(SIGHUP, logfile_hup_notify,st);
    }
}

static struct flagstr message_class_table[]={
    { "debug-config", M_DEBUG_CONFIG },
    { "debug-phase", M_DEBUG_PHASE },
    { "debug", M_DEBUG },
    { "all-debug", M_DEBUG|M_DEBUG_PHASE|M_DEBUG_CONFIG },
    { "info", M_INFO },
    { "notice", M_NOTICE },
    { "warning", M_WARNING },
    { "error", M_ERR },
    { "security", M_SECURITY },
    { "fatal", M_FATAL },
    { "default", M_WARNING|M_ERR|M_SECURITY|M_FATAL },
    { "verbose", M_INFO|M_NOTICE|M_WARNING|M_ERR|M_SECURITY|M_FATAL },
    { "quiet", M_FATAL },
    { NULL, 0 }
};

static list_t *logfile_apply(closure_t *self, struct cloc loc, dict_t *context,
			     list_t *args)
{
    struct logfile *st;
    item_t *item;
    dict_t *dict;

    /* We should defer opening the logfile until the getresources
       phase.  We should defer writing into the logfile until after we
       become a daemon. */
    
    st=safe_malloc(sizeof(*st),"logfile_apply");
    st->cl.description="logfile";
    st->cl.type=CL_LOG;
    st->cl.apply=NULL;
    st->cl.interface=&st->ops;
    st->ops.st=st;
    st->ops.log=logfile_log;
    st->ops.vlog=logfile_vlog;
    st->loc=loc;
    st->f=NULL;

    item=list_elem(args,0);
    if (!item || item->type!=t_dict) {
	cfgfatal(loc,"logfile","argument must be a dictionary\n");
    }
    dict=item->data.dict;

    st->logfile=dict_read_string(dict,"filename",True,"logfile",loc);
    st->level=string_list_to_word(dict_lookup(dict,"class"),
				       message_class_table,"logfile");

    add_hook(PHASE_GETRESOURCES,logfile_phase_hook,st);

    return new_closure(&st->cl);
}

struct syslog {
    closure_t cl;
    struct log_if ops;
    string_t ident;
    int facility;
    bool_t open;
};

static int msgclass_to_syslogpriority(uint32_t m)
{
    switch (m) {
    case M_DEBUG_CONFIG: return LOG_DEBUG;
    case M_DEBUG_PHASE: return LOG_DEBUG;
    case M_DEBUG: return LOG_DEBUG;
    case M_INFO: return LOG_INFO;
    case M_NOTICE: return LOG_NOTICE;
    case M_WARNING: return LOG_WARNING;
    case M_ERR: return LOG_ERR;
    case M_SECURITY: return LOG_CRIT;
    case M_FATAL: return LOG_EMERG;
    default: return LOG_NOTICE;
    }
}
    
static void syslog_vlog(void *sst, int class, const char *message,
			 va_list args)
{
    struct syslog *st=sst;

    if (st->open)
	vsyslog(msgclass_to_syslogpriority(class),message,args);
    else {
	vMessageFallback(class,message,args);
	MessageFallback(class,"\n");
    }
}

static void syslog_log(void *sst, int priority, const char *message, ...)
{
    va_list ap;

    va_start(ap,message);
    syslog_vlog(sst,priority,message,ap);
    va_end(ap);
}

static struct flagstr syslog_facility_table[]={
#ifdef LOG_AUTH
    { "auth", LOG_AUTH },
#endif
#ifdef LOG_AUTHPRIV
    { "authpriv", LOG_AUTHPRIV },
#endif
    { "cron", LOG_CRON },
    { "daemon", LOG_DAEMON },
    { "kern", LOG_KERN },
    { "local0", LOG_LOCAL0 },
    { "local1", LOG_LOCAL1 },
    { "local2", LOG_LOCAL2 },
    { "local3", LOG_LOCAL3 },
    { "local4", LOG_LOCAL4 },
    { "local5", LOG_LOCAL5 },
    { "local6", LOG_LOCAL6 },
    { "local7", LOG_LOCAL7 },
    { "lpr", LOG_LPR },
    { "mail", LOG_MAIL },
    { "news", LOG_NEWS },
    { "syslog", LOG_SYSLOG },
    { "user", LOG_USER },
    { "uucp", LOG_UUCP },
    { NULL, 0 }
};

static void syslog_phase_hook(void *sst, uint32_t newphase)
{
    struct syslog *st=sst;

    if (background) {
	openlog(st->ident,0,st->facility);
	st->open=True;
    }
}

static list_t *syslog_apply(closure_t *self, struct cloc loc, dict_t *context,
			    list_t *args)
{
    struct syslog *st;
    dict_t *d;
    item_t *item;
    string_t facstr;

    st=safe_malloc(sizeof(*st),"syslog_apply");
    st->cl.description="syslog";
    st->cl.type=CL_LOG;
    st->cl.apply=NULL;
    st->cl.interface=&st->ops;
    st->ops.st=st;
    st->ops.log=syslog_log;
    st->ops.vlog=syslog_vlog;

    item=list_elem(args,0);
    if (!item || item->type!=t_dict)
	cfgfatal(loc,"syslog","parameter must be a dictionary\n");
    d=item->data.dict;

    st->ident=dict_read_string(d, "ident", False, "syslog", loc);
    facstr=dict_read_string(d, "facility", True, "syslog", loc);
    st->facility=string_to_word(facstr,loc,
				syslog_facility_table,"syslog");
    st->open=False;
    add_hook(PHASE_GETRESOURCES,syslog_phase_hook,st);

    return new_closure(&st->cl);
}    

/* Read from a fd and output to a log.  This is a quick hack to
   support logging stderr, and needs code adding to tidy up before it
   can be used for anything else. */
#define FDLOG_BUFSIZE 1024
struct fdlog {
    struct log_if *log;
    int fd;
    cstring_t prefix;
    string_t buffer;
    int i;
    bool_t finished;
};

static int log_from_fd_beforepoll(void *sst, struct pollfd *fds, int *nfds_io,
				  int *timeout_io)
{
    struct fdlog *st=sst;
    if (!st->finished) {
	*nfds_io=1;
	fds[0].fd=st->fd;
	fds[0].events=POLLIN;
    }
    return 0;
}

static void log_from_fd_afterpoll(void *sst, struct pollfd *fds, int nfds)
{
    struct fdlog *st=sst;
    int r,remain,i;

    if (nfds==0) return;
    if (fds[0].revents&POLLERR) {
	st->finished=True;
    }
    if (fds[0].revents&POLLIN) {
	remain=FDLOG_BUFSIZE-st->i-1;
	if (remain<=0) {
	    st->buffer[FDLOG_BUFSIZE-1]=0;
	    st->log->log(st->log,M_WARNING,"%s: overlong line: %s",
			 st->prefix,st->buffer);
	    st->i=0;
	    remain=FDLOG_BUFSIZE-1;
	}
	r=read(st->fd,st->buffer+st->i,remain);
	if (r>0) {
	    st->i+=r;
	    for (i=0; i<st->i; i++) {
		if (st->buffer[i]=='\n') {
		    st->buffer[i]=0;
		    st->log->log(st->log->st,M_INFO,"%s: %s",
				 st->prefix,st->buffer);
		    i++;
		    memmove(st->buffer,st->buffer+i,st->i-i);
		    st->i-=i;
		    i=-1;
		}
	    }
	} else {
	    Message(M_WARNING,"log_from_fd: %s\n",strerror(errno));
	    st->finished=True;
	}
    }
}
		
void log_from_fd(int fd, cstring_t prefix, struct log_if *log)
{
    struct fdlog *st;

    st=safe_malloc(sizeof(*st),"log_from_fd");
    st->log=log;
    st->fd=fd;
    st->prefix=prefix;
    st->buffer=safe_malloc(FDLOG_BUFSIZE,"log_from_fd");
    st->i=0;
    st->finished=False;

    register_for_poll(st,log_from_fd_beforepoll,log_from_fd_afterpoll,1,
		      prefix);
}

void log_module(dict_t *dict)
{
    add_closure(dict,"logfile",logfile_apply);
    add_closure(dict,"syslog",syslog_apply);
}
Commit	Line	Data
7138d0c5 SE	1	#include "secnet.h"
	2	#include <stdio.h>
	3	#include <string.h>
	4	#include <stdlib.h>
	5	#include <time.h>
	6	#include <errno.h>
	7	#include <syslog.h>
4f5e39ec	8	#include <assert.h>
fe5e9cc4	9	#include <unistd.h>
7138d0c5	10	#include "process.h"
08ee90a2	11	#include "util.h"
7138d0c5 SE	12
7138d0c5 SE	13	bool_t secnet_is_daemon=False;
469fd1d9	14	uint32_t message_level=M_WARNING\|M_ERR\|M_SECURITY\|M_FATAL;
7138d0c5 SE	15	struct log_if *system_log=NULL;
7138d0c5 SE	16
ba72e2bf	17	static void vMessageFallback(uint32_t class, const char *message, va_list args)
7138d0c5 SE	18	{
7138d0c5 SE	19	FILE *dest=stdout;
ba72e2bf IJ	20	/* Messages go to stdout/stderr */
	21	if (class & message_level) {
	22	if (class&M_FATAL \|\| class&M_ERR \|\| class&M_WARNING) {
	23	dest=stderr;
	24	}
	25	vfprintf(dest,message,args);
	26	}
	27	}
	28
	29	static void vMessage(uint32_t class, const char *message, va_list args)
	30	{
7138d0c5 SE	31	#define MESSAGE_BUFLEN 1023
7138d0c5 SE	32	static char buff[MESSAGE_BUFLEN+1]={0,};
1caa23ff	33	size_t bp;
7138d0c5 SE	34	char *nlp;
7138d0c5 SE	35
7b1a9fb7	36	if (system_log) {
7138d0c5 SE	37	/* Messages go to the system log interface */
7138d0c5 SE	38	bp=strlen(buff);
59230b9b	39	assert(bp < MESSAGE_BUFLEN);
7138d0c5	40	vsnprintf(buff+bp,MESSAGE_BUFLEN-bp,message,args);
b7164ab6 IJ	41	buff[sizeof(buff)-2] = '\n';
b7164ab6 IJ	42	buff[sizeof(buff)-1] = '\0';
7138d0c5 SE	43	/* Each line is sent separately */
	44	while ((nlp=strchr(buff,'\n'))) {
	45	*nlp=0;
7908f2c6	46	slilog(system_log,class,"%s",buff);
7138d0c5 SE	47	memmove(buff,nlp+1,strlen(nlp+1)+1);
	48	}
	49	} else {
ba72e2bf	50	vMessageFallback(class,message,args);
7138d0c5 SE	51	}
	52	}
	53
fe5e9cc4	54	void Message(uint32_t class, const char *message, ...)
7138d0c5 SE	55	{
	56	va_list ap;
	57
	58	va_start(ap,message);
	59	vMessage(class,message,ap);
	60	va_end(ap);
	61	}
	62
ba72e2bf IJ	63	static void MessageFallback(uint32_t class, const char *message, ...)
	64	{
	65	va_list ap;
	66
	67	va_start(ap,message);
	68	vMessageFallback(class,message,ap);
	69	va_end(ap);
	70	}
	71
fe5e9cc4	72	static NORETURN(vfatal(int status, bool_t perror, const char *message,
4f5e39ec SE	73	va_list args));
4f5e39ec SE	74
fe5e9cc4 SE	75	static void vfatal(int status, bool_t perror, const char *message,
fe5e9cc4 SE	76	va_list args)
7138d0c5 SE	77	{
	78	int err;
	79
	80	err=errno;
	81
	82	enter_phase(PHASE_SHUTDOWN);
4f5e39ec SE	83	Message(M_FATAL, "secnet fatal error: ");
	84	vMessage(M_FATAL, message, args);
	85	if (perror)
7138d0c5	86	Message(M_FATAL, ": %s\n",strerror(err));
4f5e39ec SE	87	else
4f5e39ec SE	88	Message(M_FATAL, "\n");
7138d0c5 SE	89	exit(status);
	90	}
	91
fe5e9cc4	92	void fatal(const char *message, ...)
7138d0c5 SE	93	{
	94	va_list args;
	95	va_start(args,message);
	96	vfatal(current_phase,False,message,args);
	97	va_end(args);
	98	}
	99
fe5e9cc4	100	void fatal_status(int status, const char *message, ...)
7138d0c5 SE	101	{
	102	va_list args;
	103	va_start(args,message);
	104	vfatal(status,False,message,args);
	105	va_end(args);
	106	}
	107
fe5e9cc4	108	void fatal_perror(const char *message, ...)
7138d0c5 SE	109	{
	110	va_list args;
	111	va_start(args,message);
	112	vfatal(current_phase,True,message,args);
	113	va_end(args);
	114	}
	115
fe5e9cc4	116	void fatal_perror_status(int status, const char *message, ...)
7138d0c5 SE	117	{
	118	va_list args;
	119	va_start(args,message);
	120	vfatal(status,True,message,args);
	121	va_end(args);
	122	}
	123
4f5e39ec	124	void vcfgfatal_maybefile(FILE maybe_f / or 0 */, struct cloc loc,
fe5e9cc4	125	cstring_t facility, const char *message, va_list args)
7138d0c5	126	{
7138d0c5 SE	127	enter_phase(PHASE_SHUTDOWN);
7138d0c5 SE	128
4f5e39ec SE	129	if (maybe_f && ferror(maybe_f)) {
	130	assert(loc.file);
	131	Message(M_FATAL, "error reading config file (%s, %s): %s",
	132	facility, loc.file, strerror(errno));
	133	} else if (maybe_f && feof(maybe_f)) {
	134	assert(loc.file);
	135	Message(M_FATAL, "unexpected end of config file (%s, %s)",
	136	facility, loc.file);
	137	} else if (loc.file && loc.line) {
7138d0c5 SE	138	Message(M_FATAL, "config error (%s, %s:%d): ",facility,loc.file,
	139	loc.line);
	140	} else if (!loc.file && loc.line) {
	141	Message(M_FATAL, "config error (%s, line %d): ",facility,loc.line);
	142	} else {
	143	Message(M_FATAL, "config error (%s): ",facility);
	144	}
	145
	146	vMessage(M_FATAL,message,args);
7138d0c5 SE	147	exit(current_phase);
	148	}
	149
fe5e9cc4 SE	150	void cfgfatal_maybefile(FILE *maybe_f, struct cloc loc, cstring_t facility,
fe5e9cc4 SE	151	const char *message, ...)
4f5e39ec SE	152	{
	153	va_list args;
	154
	155	va_start(args,message);
	156	vcfgfatal_maybefile(maybe_f,loc,facility,message,args);
	157	va_end(args);
	158	}
	159
fe5e9cc4	160	void cfgfatal(struct cloc loc, cstring_t facility, const char *message, ...)
4f5e39ec SE	161	{
	162	va_list args;
	163
	164	va_start(args,message);
	165	vcfgfatal_maybefile(0,loc,facility,message,args);
	166	va_end(args);
	167	}
	168
	169	void cfgfile_postreadcheck(struct cloc loc, FILE *f)
	170	{
	171	assert(loc.file);
	172	if (ferror(f)) {
39a6b1e2	173	Message(M_FATAL, "error reading config file (%s): %s\n",
4f5e39ec SE	174	loc.file, strerror(errno));
	175	exit(current_phase);
	176	} else if (feof(f)) {
39a6b1e2	177	Message(M_FATAL, "unexpected end of config file (%s)\n", loc.file);
4f5e39ec SE	178	exit(current_phase);
	179	}
	180	}
	181
7138d0c5 SE	182	/* Take a list of log closures and merge them */
	183	struct loglist {
	184	struct log_if *l;
	185	struct loglist *next;
	186	};
	187
fe5e9cc4	188	static void log_vmulti(void sst, int class, const char message, va_list args)
7138d0c5 SE	189	{
	190	struct loglist st=sst, i;
	191
	192	if (secnet_is_daemon) {
	193	for (i=st; i; i=i->next) {
	194	i->l->vlog(i->l->st,class,message,args);
	195	}
	196	} else {
	197	vMessage(class,message,args);
	198	Message(class,"\n");
	199	}
	200	}
	201
fe5e9cc4	202	static void log_multi(void st, int priority, const char message, ...)
7138d0c5 SE	203	{
	204	va_list ap;
	205
	206	va_start(ap,message);
	207	log_vmulti(st,priority,message,ap);
	208	va_end(ap);
	209	}
	210
	211	struct log_if init_log(list_t ll)
	212	{
	213	int i=0;
	214	item_t *item;
	215	closure_t *cl;
	216	struct loglist l=NULL, n;
	217	struct log_if *r;
	218
	219	if (list_length(ll)==1) {
	220	item=list_elem(ll,0);
	221	cl=item->data.closure;
	222	if (cl->type!=CL_LOG) {
	223	cfgfatal(item->loc,"init_log","closure is not a logger");
	224	}
	225	return cl->interface;
	226	}
	227	while ((item=list_elem(ll,i++))) {
	228	if (item->type!=t_closure) {
	229	cfgfatal(item->loc,"init_log","item is not a closure");
	230	}
	231	cl=item->data.closure;
	232	if (cl->type!=CL_LOG) {
	233	cfgfatal(item->loc,"init_log","closure is not a logger");
	234	}
	235	n=safe_malloc(sizeof(*n),"init_log");
	236	n->l=cl->interface;
	237	n->next=l;
	238	l=n;
	239	}
	240	if (!l) {
	241	fatal("init_log: no log");
	242	}
	243	r=safe_malloc(sizeof(*r), "init_log");
	244	r->st=l;
	245	r->log=log_multi;
	246	r->vlog=log_vmulti;
	247	return r;
	248	}
	249
	250	struct logfile {
	251	closure_t cl;
	252	struct log_if ops;
	253	struct cloc loc;
	254	string_t logfile;
	255	uint32_t level;
	256	FILE *f;
	257	};
	258
fe5e9cc4	259	static cstring_t months[]={
7138d0c5 SE	260	"Jan","Feb","Mar","Apr","May","Jun","Jul","Aug","Sep","Oct","Nov","Dec"};
7138d0c5 SE	261
fe5e9cc4 SE	262	static void logfile_vlog(void sst, int class, const char message,
fe5e9cc4 SE	263	va_list args)
7138d0c5 SE	264	{
	265	struct logfile *st=sst;
	266	time_t t;
	267	struct tm *tm;
	268
fe5e9cc4	269	if (secnet_is_daemon && st->f) {
7138d0c5 SE	270	if (class&st->level) {
	271	t=time(NULL);
	272	tm=localtime(&t);
	273	fprintf(st->f,"%s %2d %02d:%02d:%02d ",
	274	months[tm->tm_mon],tm->tm_mday,tm->tm_hour,tm->tm_min,
	275	tm->tm_sec);
	276	vfprintf(st->f,message,args);
	277	fprintf(st->f,"\n");
	278	fflush(st->f);
	279	}
	280	} else {
ba72e2bf IJ	281	vMessageFallback(class,message,args);
ba72e2bf IJ	282	MessageFallback(class,"\n");
7138d0c5 SE	283	}
	284	}
	285
fe5e9cc4	286	static void logfile_log(void state, int class, const char message, ...)
7138d0c5 SE	287	{
	288	va_list ap;
	289
	290	va_start(ap,message);
fe5e9cc4	291	logfile_vlog(state,class,message,ap);
7138d0c5 SE	292	va_end(ap);
	293	}
	294
	295	static void logfile_hup_notify(void *sst, int signum)
	296	{
	297	struct logfile *st=sst;
	298	FILE *f;
	299	f=fopen(st->logfile,"a");
	300	if (!f) {
	301	logfile_log(st,M_FATAL,"received SIGHUP, but could not reopen "
	302	"logfile: %s",strerror(errno));
	303	} else {
	304	fclose(st->f);
	305	st->f=f;
	306	logfile_log(st,M_INFO,"received SIGHUP");
	307	}
	308	}
	309
	310	static void logfile_phase_hook(void *sst, uint32_t new_phase)
	311	{
	312	struct logfile *st=sst;
	313	FILE *f;
	314
	315	if (background) {
	316	f=fopen(st->logfile,"a");
	317	if (!f) fatal_perror("logfile (%s:%d): cannot open \"%s\"",
	318	st->loc.file,st->loc.line,st->logfile);
	319	st->f=f;
	320	request_signal_notification(SIGHUP, logfile_hup_notify,st);
	321	}
	322	}
	323
	324	static struct flagstr message_class_table[]={
	325	{ "debug-config", M_DEBUG_CONFIG },
	326	{ "debug-phase", M_DEBUG_PHASE },
	327	{ "debug", M_DEBUG },
	328	{ "all-debug", M_DEBUG\|M_DEBUG_PHASE\|M_DEBUG_CONFIG },
	329	{ "info", M_INFO },
	330	{ "notice", M_NOTICE },
	331	{ "warning", M_WARNING },
469fd1d9	332	{ "error", M_ERR },
7138d0c5 SE	333	{ "security", M_SECURITY },
7138d0c5 SE	334	{ "fatal", M_FATAL },
469fd1d9 SE	335	{ "default", M_WARNING\|M_ERR\|M_SECURITY\|M_FATAL },
469fd1d9 SE	336	{ "verbose", M_INFO\|M_NOTICE\|M_WARNING\|M_ERR\|M_SECURITY\|M_FATAL },
7138d0c5 SE	337	{ "quiet", M_FATAL },
	338	{ NULL, 0 }
	339	};
	340
	341	static list_t logfile_apply(closure_t self, struct cloc loc, dict_t *context,
	342	list_t *args)
	343	{
	344	struct logfile *st;
	345	item_t *item;
	346	dict_t *dict;
	347
	348	/* We should defer opening the logfile until the getresources
	349	phase. We should defer writing into the logfile until after we
	350	become a daemon. */
	351
	352	st=safe_malloc(sizeof(*st),"logfile_apply");
	353	st->cl.description="logfile";
	354	st->cl.type=CL_LOG;
	355	st->cl.apply=NULL;
	356	st->cl.interface=&st->ops;
	357	st->ops.st=st;
	358	st->ops.log=logfile_log;
	359	st->ops.vlog=logfile_vlog;
	360	st->loc=loc;
fe5e9cc4	361	st->f=NULL;
7138d0c5 SE	362
	363	item=list_elem(args,0);
	364	if (!item \|\| item->type!=t_dict) {
	365	cfgfatal(loc,"logfile","argument must be a dictionary\n");
	366	}
	367	dict=item->data.dict;
	368
	369	st->logfile=dict_read_string(dict,"filename",True,"logfile",loc);
	370	st->level=string_list_to_word(dict_lookup(dict,"class"),
	371	message_class_table,"logfile");
	372
	373	add_hook(PHASE_GETRESOURCES,logfile_phase_hook,st);
	374
	375	return new_closure(&st->cl);
	376	}
	377
	378	struct syslog {
	379	closure_t cl;
	380	struct log_if ops;
	381	string_t ident;
	382	int facility;
	383	bool_t open;
	384	};
	385
	386	static int msgclass_to_syslogpriority(uint32_t m)
	387	{
	388	switch (m) {
	389	case M_DEBUG_CONFIG: return LOG_DEBUG;
	390	case M_DEBUG_PHASE: return LOG_DEBUG;
	391	case M_DEBUG: return LOG_DEBUG;
	392	case M_INFO: return LOG_INFO;
	393	case M_NOTICE: return LOG_NOTICE;
	394	case M_WARNING: return LOG_WARNING;
469fd1d9	395	case M_ERR: return LOG_ERR;
7138d0c5 SE	396	case M_SECURITY: return LOG_CRIT;
	397	case M_FATAL: return LOG_EMERG;
	398	default: return LOG_NOTICE;
	399	}
	400	}
	401
fe5e9cc4	402	static void syslog_vlog(void sst, int class, const char message,
7138d0c5 SE	403	va_list args)
	404	{
	405	struct syslog *st=sst;
	406
	407	if (st->open)
	408	vsyslog(msgclass_to_syslogpriority(class),message,args);
	409	else {
ba72e2bf IJ	410	vMessageFallback(class,message,args);
ba72e2bf IJ	411	MessageFallback(class,"\n");
7138d0c5 SE	412	}
	413	}
	414
fe5e9cc4	415	static void syslog_log(void sst, int priority, const char message, ...)
7138d0c5 SE	416	{
	417	va_list ap;
	418
	419	va_start(ap,message);
	420	syslog_vlog(sst,priority,message,ap);
	421	va_end(ap);
	422	}
	423
	424	static struct flagstr syslog_facility_table[]={
8dea8d37 SE	425	#ifdef LOG_AUTH
	426	{ "auth", LOG_AUTH },
	427	#endif
	428	#ifdef LOG_AUTHPRIV
7138d0c5	429	{ "authpriv", LOG_AUTHPRIV },
8dea8d37	430	#endif
7138d0c5 SE	431	{ "cron", LOG_CRON },
	432	{ "daemon", LOG_DAEMON },
	433	{ "kern", LOG_KERN },
	434	{ "local0", LOG_LOCAL0 },
	435	{ "local1", LOG_LOCAL1 },
	436	{ "local2", LOG_LOCAL2 },
	437	{ "local3", LOG_LOCAL3 },
	438	{ "local4", LOG_LOCAL4 },
	439	{ "local5", LOG_LOCAL5 },
	440	{ "local6", LOG_LOCAL6 },
	441	{ "local7", LOG_LOCAL7 },
	442	{ "lpr", LOG_LPR },
	443	{ "mail", LOG_MAIL },
	444	{ "news", LOG_NEWS },
	445	{ "syslog", LOG_SYSLOG },
	446	{ "user", LOG_USER },
	447	{ "uucp", LOG_UUCP },
	448	{ NULL, 0 }
	449	};
	450
	451	static void syslog_phase_hook(void *sst, uint32_t newphase)
	452	{
	453	struct syslog *st=sst;
	454
	455	if (background) {
	456	openlog(st->ident,0,st->facility);
	457	st->open=True;
	458	}
	459	}
	460
	461	static list_t syslog_apply(closure_t self, struct cloc loc, dict_t *context,
	462	list_t *args)
	463	{
	464	struct syslog *st;
	465	dict_t *d;
	466	item_t *item;
	467	string_t facstr;
	468
	469	st=safe_malloc(sizeof(*st),"syslog_apply");
	470	st->cl.description="syslog";
	471	st->cl.type=CL_LOG;
	472	st->cl.apply=NULL;
	473	st->cl.interface=&st->ops;
	474	st->ops.st=st;
	475	st->ops.log=syslog_log;
	476	st->ops.vlog=syslog_vlog;
	477
	478	item=list_elem(args,0);
	479	if (!item \|\| item->type!=t_dict)
	480	cfgfatal(loc,"syslog","parameter must be a dictionary\n");
	481	d=item->data.dict;
	482
	483	st->ident=dict_read_string(d, "ident", False, "syslog", loc);
	484	facstr=dict_read_string(d, "facility", True, "syslog", loc);
	485	st->facility=string_to_word(facstr,loc,
	486	syslog_facility_table,"syslog");
	487	st->open=False;
	488	add_hook(PHASE_GETRESOURCES,syslog_phase_hook,st);
	489
	490	return new_closure(&st->cl);
	491	}
	492
fe5e9cc4 SE	493	/* Read from a fd and output to a log. This is a quick hack to
	494	support logging stderr, and needs code adding to tidy up before it
	495	can be used for anything else. */
	496	#define FDLOG_BUFSIZE 1024
	497	struct fdlog {
	498	struct log_if *log;
	499	int fd;
	500	cstring_t prefix;
	501	string_t buffer;
	502	int i;
	503	bool_t finished;
	504	};
	505
	506	static int log_from_fd_beforepoll(void sst, struct pollfd fds, int *nfds_io,
90a39563	507	int *timeout_io)
fe5e9cc4 SE	508	{
	509	struct fdlog *st=sst;
	510	if (!st->finished) {
	511	*nfds_io=1;
	512	fds[0].fd=st->fd;
	513	fds[0].events=POLLIN;
	514	}
	515	return 0;
	516	}
	517
90a39563	518	static void log_from_fd_afterpoll(void sst, struct pollfd fds, int nfds)
fe5e9cc4 SE	519	{
	520	struct fdlog *st=sst;
	521	int r,remain,i;
	522
	523	if (nfds==0) return;
	524	if (fds[0].revents&POLLERR) {
	525	st->finished=True;
	526	}
	527	if (fds[0].revents&POLLIN) {
	528	remain=FDLOG_BUFSIZE-st->i-1;
	529	if (remain<=0) {
	530	st->buffer[FDLOG_BUFSIZE-1]=0;
	531	st->log->log(st->log,M_WARNING,"%s: overlong line: %s",
	532	st->prefix,st->buffer);
	533	st->i=0;
	534	remain=FDLOG_BUFSIZE-1;
	535	}
	536	r=read(st->fd,st->buffer+st->i,remain);
	537	if (r>0) {
	538	st->i+=r;
	539	for (i=0; i<st->i; i++) {
	540	if (st->buffer[i]=='\n') {
	541	st->buffer[i]=0;
	542	st->log->log(st->log->st,M_INFO,"%s: %s",
	543	st->prefix,st->buffer);
	544	i++;
	545	memmove(st->buffer,st->buffer+i,st->i-i);
	546	st->i-=i;
	547	i=-1;
	548	}
	549	}
	550	} else {
	551	Message(M_WARNING,"log_from_fd: %s\n",strerror(errno));
	552	st->finished=True;
	553	}
	554	}
	555	}
	556
	557	void log_from_fd(int fd, cstring_t prefix, struct log_if *log)
	558	{
	559	struct fdlog *st;
	560
	561	st=safe_malloc(sizeof(*st),"log_from_fd");
	562	st->log=log;
	563	st->fd=fd;
	564	st->prefix=prefix;
	565	st->buffer=safe_malloc(FDLOG_BUFSIZE,"log_from_fd");
	566	st->i=0;
	567	st->finished=False;
	568
	569	register_for_poll(st,log_from_fd_beforepoll,log_from_fd_afterpoll,1,
	570	prefix);
	571	}
	572
7138d0c5 SE	573	void log_module(dict_t *dict)
	574	{
	575	add_closure(dict,"logfile",logfile_apply);
	576	add_closure(dict,"syslog",syslog_apply);
	577	}