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