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