1 /*
2  * Lib9 is miscellany from the Plan 9 C library that doesn't
3  * fit into libutf or into libfmt, but is still missing from traditional
4  * Unix C libraries.
5  */
6 #ifndef _LIBC_H_
7 #define _LIBC_H_ 1
8 #if defined(__cplusplus)
9 extern "C" {
10 #endif                                                                
11 
12 /*
13  * Begin usual libc.h 
14  */
15 
16 #define	nil	((void*)0)
17 #define	nelem(x)	(sizeof(x)/sizeof((x)[0]))
18 
19 #ifndef offsetof
20 #define offsetof(s, m)	(ulong)(&(((s*)0)->m))
21 #endif
22 
23 /*
24  * mem routines (provided by system <string.h>)
25  *
26 extern	void*	memccpy(void*, void*, int, ulong);
27 extern	void*	memset(void*, int, ulong);
28 extern	int	memcmp(void*, void*, ulong);
29 extern	void*	memcpy(void*, void*, ulong);
30 extern	void*	memmove(void*, void*, ulong);
31 extern	void*	memchr(void*, int, ulong);
32  */
33 
34 /*
35  * string routines (provided by system <string.h>)
36  *
37 extern	char*	strcat(char*, char*);
38 extern	char*	strchr(char*, int);
39 extern	int	strcmp(char*, char*);
40 extern	char*	strcpy(char*, char*);
41  */
42 extern	char*	strecpy(char*, char*, char*);
43 extern	char*	p9strdup(char*);
44 /*
45 extern	char*	strncat(char*, char*, long);
46 extern	char*	strncpy(char*, char*, long);
47 extern	int	strncmp(char*, char*, long);
48 extern	char*	strpbrk(char*, char*);
49 extern	char*	strrchr(char*, int);
50 extern	char*	strtok(char*, char*);
51 extern	long	strlen(char*);
52 extern	long	strspn(char*, char*);
53 extern	long	strcspn(char*, char*);
54 extern	char*	strstr(char*, char*);
55  */
56 extern	int	cistrncmp(char*, char*, int);
57 extern	int	cistrcmp(char*, char*);
58 extern	char*	cistrstr(char*, char*);
59 extern	int	tokenize(char*, char**, int);
60 
61 /*
62 enum
63 {
64 	UTFmax		= 3,
65 	Runesync	= 0x80,
66 	Runeself	= 0x80,
67 	Runeerror	= 0x80,
68 };
69 */
70 
71 /*
72  * rune routines (provided by <utf.h>
73  *
74 extern	int	runetochar(char*, Rune*);
75 extern	int	chartorune(Rune*, char*);
76 extern	int	runelen(long);
77 extern	int	runenlen(Rune*, int);
78 extern	int	fullrune(char*, int);
79 extern	int	utflen(char*);
80 extern	int	utfnlen(char*, long);
81 extern	char*	utfrune(char*, long);
82 extern	char*	utfrrune(char*, long);
83 extern	char*	utfutf(char*, char*);
84 extern	char*	utfecpy(char*, char*, char*);
85 
86 extern	Rune*	runestrcat(Rune*, Rune*);
87 extern	Rune*	runestrchr(Rune*, Rune);
88 extern	int	runestrcmp(Rune*, Rune*);
89 extern	Rune*	runestrcpy(Rune*, Rune*);
90 extern	Rune*	runestrncpy(Rune*, Rune*, long);
91 extern	Rune*	runestrecpy(Rune*, Rune*, Rune*);
92 extern	Rune*	runestrdup(Rune*);
93 extern	Rune*	runestrncat(Rune*, Rune*, long);
94 extern	int	runestrncmp(Rune*, Rune*, long);
95 extern	Rune*	runestrrchr(Rune*, Rune);
96 extern	long	runestrlen(Rune*);
97 extern	Rune*	runestrstr(Rune*, Rune*);
98 
99 extern	Rune	tolowerrune(Rune);
100 extern	Rune	totitlerune(Rune);
101 extern	Rune	toupperrune(Rune);
102 extern	int	isalpharune(Rune);
103 extern	int	islowerrune(Rune);
104 extern	int	isspacerune(Rune);
105 extern	int	istitlerune(Rune);
106 extern	int	isupperrune(Rune);
107  */
108 
109 /*
110  * malloc (provied by system <stdlib.h>)
111  *
112 extern	void*	malloc(ulong);
113  */
114 extern	void*	p9malloc(ulong);
115 extern	void*	mallocz(ulong, int);
116 extern	void	p9free(void*);
117 extern	void*	p9calloc(ulong, ulong);
118 extern	void*	p9realloc(void*, ulong);
119 extern	void		setmalloctag(void*, ulong);
120 extern	void		setrealloctag(void*, ulong);
121 extern	ulong	getmalloctag(void*);
122 extern	ulong	getrealloctag(void*);
123 /*
124 extern	void*	malloctopoolblock(void*);
125 */
126 #ifndef NOPLAN9DEFINES
127 #define	malloc	p9malloc
128 #define	realloc	p9realloc
129 #define	calloc	p9calloc
130 #define	free	p9free
131 #undef strdup
132 #define	strdup	p9strdup
133 #endif
134 
135 /*
136  * print routines (provided by <fmt.h>)
137  *
138 typedef struct Fmt	Fmt;
139 struct Fmt{
140 	uchar	runes;
141 	void	*start;
142 	void	*to;
143 	void	*stop;
144 	int	(*flush)(Fmt *);
145 	void	*farg;
146 	int	nfmt;
147 	va_list	args;
148 	int	r;
149 	int	width;
150 	int	prec;
151 	ulong	flags;
152 };
153 
154 enum{
155 	FmtWidth	= 1,
156 	FmtLeft		= FmtWidth << 1,
157 	FmtPrec		= FmtLeft << 1,
158 	FmtSharp	= FmtPrec << 1,
159 	FmtSpace	= FmtSharp << 1,
160 	FmtSign		= FmtSpace << 1,
161 	FmtZero		= FmtSign << 1,
162 	FmtUnsigned	= FmtZero << 1,
163 	FmtShort	= FmtUnsigned << 1,
164 	FmtLong		= FmtShort << 1,
165 	FmtVLong	= FmtLong << 1,
166 	FmtComma	= FmtVLong << 1,
167 	FmtByte	= FmtComma << 1,
168 
169 	FmtFlag		= FmtByte << 1
170 };
171 
172 extern	int	print(char*, ...);
173 extern	char*	seprint(char*, char*, char*, ...);
174 extern	char*	vseprint(char*, char*, char*, va_list);
175 extern	int	snprint(char*, int, char*, ...);
176 extern	int	vsnprint(char*, int, char*, va_list);
177 extern	char*	smprint(char*, ...);
178 extern	char*	vsmprint(char*, va_list);
179 extern	int	sprint(char*, char*, ...);
180 extern	int	fprint(int, char*, ...);
181 extern	int	vfprint(int, char*, va_list);
182 
183 extern	int	runesprint(Rune*, char*, ...);
184 extern	int	runesnprint(Rune*, int, char*, ...);
185 extern	int	runevsnprint(Rune*, int, char*, va_list);
186 extern	Rune*	runeseprint(Rune*, Rune*, char*, ...);
187 extern	Rune*	runevseprint(Rune*, Rune*, char*, va_list);
188 extern	Rune*	runesmprint(char*, ...);
189 extern	Rune*	runevsmprint(char*, va_list);
190 
191 extern	int	fmtfdinit(Fmt*, int, char*, int);
192 extern	int	fmtfdflush(Fmt*);
193 extern	int	fmtstrinit(Fmt*);
194 extern	char*	fmtstrflush(Fmt*);
195 extern	int	runefmtstrinit(Fmt*);
196 extern	Rune*	runefmtstrflush(Fmt*);
197 
198 extern	int	fmtinstall(int, int (*)(Fmt*));
199 extern	int	dofmt(Fmt*, char*);
200 extern	int	dorfmt(Fmt*, Rune*);
201 extern	int	fmtprint(Fmt*, char*, ...);
202 extern	int	fmtvprint(Fmt*, char*, va_list);
203 extern	int	fmtrune(Fmt*, int);
204 extern	int	fmtstrcpy(Fmt*, char*);
205 extern	int	fmtrunestrcpy(Fmt*, Rune*);
206  */
207 
208 /*
209  * error string for %r
210  * supplied on per os basis, not part of fmt library
211  *
212  * (provided by lib9, but declared in fmt.h)
213  *
214 extern	int	errfmt(Fmt *f);
215  */
216 
217 /*
218  * quoted strings
219  */
220 extern	char	*unquotestrdup(char*);
221 extern	Rune	*unquoterunestrdup(Rune*);
222 extern	char	*quotestrdup(char*);
223 extern	Rune	*quoterunestrdup(Rune*);
224 /*
225  * in fmt.h
226  *
227 extern	void	quotefmtinstall(void);
228 extern	int	quotestrfmt(Fmt*);
229 extern	int	quoterunestrfmt(Fmt*);
230  */
231 #ifndef NOPLAN9DEFINES
232 #define doquote fmtdoquote
233 #endif
234 extern	int	needsrcquote(int);
235 
236 /*
237  * random number
238  */
239 extern	void	p9srand(long);
240 extern	int	p9rand(void);
241 
242 extern	int	p9nrand(int);
243 extern	long	p9lrand(void);
244 extern	long	p9lnrand(long);
245 extern	double	p9frand(void);
246 extern	ulong	truerand(void);			/* uses /dev/random */
247 extern	ulong	ntruerand(ulong);		/* uses /dev/random */
248 
249 #ifndef NOPLAN9DEFINES
250 #define	srand	p9srand
251 #define	rand	p9rand
252 #define	nrand	p9nrand
253 #define	lrand	p9lrand
254 #define	lnrand	p9lnrand
255 #define	frand	p9frand
256 #endif
257 
258 /*
259  * math
260  */
261 extern	ulong	getfcr(void);
262 extern	void	setfsr(ulong);
263 extern	ulong	getfsr(void);
264 extern	void	setfcr(ulong);
265 extern	double	NaN(void);
266 extern	double	Inf(int);
267 extern	int	isNaN(double);
268 extern	int	isInf(double, int);
269 extern	ulong	umuldiv(ulong, ulong, ulong);
270 extern	long	muldiv(long, long, long);
271 
272 /*
273  * provided by math.h
274  *
275 extern	double	pow(double, double);
276 extern	double	atan2(double, double);
277 extern	double	fabs(double);
278 extern	double	atan(double);
279 extern	double	log(double);
280 extern	double	log10(double);
281 extern	double	exp(double);
282 extern	double	floor(double);
283 extern	double	ceil(double);
284 extern	double	hypot(double, double);
285 extern	double	sin(double);
286 extern	double	cos(double);
287 extern	double	tan(double);
288 extern	double	asin(double);
289 extern	double	acos(double);
290 extern	double	sinh(double);
291 extern	double	cosh(double);
292 extern	double	tanh(double);
293 extern	double	sqrt(double);
294 extern	double	fmod(double, double);
295 #define	HUGE	3.4028234e38
296 #define	PIO2	1.570796326794896619231e0
297 #define	PI	(PIO2+PIO2)
298  */
299 #define PI	M_PI
300 #define	PIO2	M_PI_2
301 
302 /*
303  * Time-of-day
304  */
305 
306 typedef
307 struct Tm
308 {
309 	int	sec;
310 	int	min;
311 	int	hour;
312 	int	mday;
313 	int	mon;
314 	int	year;
315 	int	wday;
316 	int	yday;
317 	char	zone[4];
318 	int	tzoff;
319 } Tm;
320 
321 extern	Tm*	p9gmtime(long);
322 extern	Tm*	p9localtime(long);
323 extern	char*	p9asctime(Tm*);
324 extern	char*	p9ctime(long);
325 extern	double	p9cputime(void);
326 extern	long	p9times(long*);
327 extern	long	p9tm2sec(Tm*);
328 extern	vlong	p9nsec(void);
329 
330 #ifndef NOPLAN9DEFINES
331 #define	gmtime		p9gmtime
332 #define	localtime	p9localtime
333 #define	asctime		p9asctime
334 #define	ctime		p9ctime
335 #define	cputime		p9cputime
336 #define	times		p9times
337 #define	tm2sec		p9tm2sec
338 #define	nsec		p9nsec
339 #endif
340 
341 /*
342  * one-of-a-kind
343  */
344 enum
345 {
346 	PNPROC		= 1,
347 	PNGROUP		= 2,
348 };
349 
350 /* extern	int	abs(int); <stdlib.h> */
351 extern	int	p9atexit(void(*)(void));
352 extern	void	p9atexitdont(void(*)(void));
353 extern	int	atnotify(int(*)(void*, char*), int);
354 /* 
355  * <stdlib.h>
356 extern	double	atof(char*); <stdlib.h>
357  */
358 extern	int	p9atoi(char*);
359 extern	long	p9atol(char*);
360 extern	vlong	p9atoll(char*);
361 extern	double	fmtcharstod(int(*)(void*), void*);
362 extern	char*	cleanname(char*);
363 extern	int	p9decrypt(void*, void*, int);
364 extern	int	p9encrypt(void*, void*, int);
365 extern	int	netcrypt(void*, void*);
366 extern	int	dec64(uchar*, int, char*, int);
367 extern	int	enc64(char*, int, uchar*, int);
368 extern	int	dec32(uchar*, int, char*, int);
369 extern	int	enc32(char*, int, uchar*, int);
370 extern	int	dec16(uchar*, int, char*, int);
371 extern	int	enc16(char*, int, uchar*, int);
372 extern	int	encodefmt(Fmt*);
373 extern	int	dirmodefmt(Fmt*);
374 extern	void	exits(char*);
375 extern	double	frexp(double, int*);
376 extern	ulong	getcallerpc(void*);
377 extern	char*	p9getenv(char*);
378 extern	int	p9putenv(char*, char*);
379 extern	int	getfields(char*, char**, int, int, char*);
380 extern	int	gettokens(char *, char **, int, char *);
381 extern	char*	getuser(void);
382 extern	char*	p9getwd(char*, int);
383 extern	int	iounit(int);
384 /* extern	long	labs(long); <math.h> */
385 /* extern	double	ldexp(double, int); <math.h> */
386 extern	void	p9longjmp(p9jmp_buf, int);
387 extern	char*	mktemp(char*);
388 extern	int		opentemp(char*);
389 /* extern	double	modf(double, double*); <math.h> */
390 extern	void	p9notejmp(void*, p9jmp_buf, int);
391 extern	void	perror(const char*);
392 extern	int	postnote(int, int, char *);
393 extern	double	p9pow10(int);
394 /* extern	int	putenv(char*, char*); <stdlib.h. */
395 /* extern	void	qsort(void*, long, long, int (*)(void*, void*)); <stdlib.h> */
396 extern	char*	searchpath(char*);
397 /* extern	int	p9setjmp(p9jmp_buf); */
398 #define p9setjmp(b)	sigsetjmp((void*)(b), 1)
399 /*
400  * <stdlib.h>
401 extern	long	strtol(char*, char**, int);
402 extern	ulong	strtoul(char*, char**, int);
403 extern	vlong	strtoll(char*, char**, int);
404 extern	uvlong	strtoull(char*, char**, int);
405  */
406 extern	void	sysfatal(char*, ...);
407 extern	void	p9syslog(int, char*, char*, ...);
408 extern	long	p9time(long*);
409 /* extern	int	tolower(int); <ctype.h> */
410 /* extern	int	toupper(int); <ctype.h> */
411 extern	void	needstack(int);
412 extern	char*	readcons(char*, char*, int);
413 
414 #ifndef NOPLAN9DEFINES
415 #define atexit		p9atexit
416 #define atexitdont	p9atexitdont
417 #define atoi		p9atoi
418 #define atol		p9atol
419 #define atoll		p9atoll
420 #define encrypt		p9encrypt
421 #define decrypt		p9decrypt
422 #define getenv		p9getenv
423 #define	getwd		p9getwd
424 #define	longjmp		p9longjmp
425 #undef  setjmp
426 #define setjmp		p9setjmp
427 #define putenv		p9putenv
428 #define notejmp		p9notejmp
429 #define jmp_buf		p9jmp_buf
430 #define time		p9time
431 #define pow10		p9pow10
432 #define strtod		fmtstrtod
433 #define charstod	fmtcharstod
434 #define syslog		p9syslog
435 #endif
436 
437 /*
438  *  just enough information so that libc can be
439  *  properly locked without dragging in all of libthread
440  */
441 typedef struct _Thread _Thread;
442 typedef struct _Threadlist _Threadlist;
443 struct _Threadlist
444 {
445 	_Thread	*head;
446 	_Thread	*tail;
447 };
448 
449 extern	_Thread	*(*threadnow)(void);
450 
451 /*
452  *  synchronization
453  */
454 typedef struct Lock Lock;
455 struct Lock
456 {
457 #ifdef PLAN9PORT_USING_PTHREADS
458 	int init;
459 	pthread_mutex_t mutex;
460 #endif
461 	int held;
462 };
463 
464 extern	void	lock(Lock*);
465 extern	void	unlock(Lock*);
466 extern	int	canlock(Lock*);
467 extern	int	(*_lock)(Lock*, int, ulong);
468 extern	void	(*_unlock)(Lock*, ulong);	
469 
470 typedef struct QLock QLock;
471 struct QLock
472 {
473 	Lock		l;
474 	_Thread	*owner;
475 	_Threadlist	waiting;
476 };
477 
478 extern	void	qlock(QLock*);
479 extern	void	qunlock(QLock*);
480 extern	int	canqlock(QLock*);
481 extern	int	(*_qlock)(QLock*, int, ulong);	/* do not use */
482 extern	void	(*_qunlock)(QLock*, ulong);
483 
484 typedef struct Rendez Rendez;
485 struct Rendez
486 {
487 	QLock	*l;
488 	_Threadlist	waiting;
489 };
490 
491 extern	void	rsleep(Rendez*);	/* unlocks r->l, sleeps, locks r->l again */
492 extern	int	rwakeup(Rendez*);
493 extern	int	rwakeupall(Rendez*);
494 extern	void	(*_rsleep)(Rendez*, ulong);	/* do not use */
495 extern	int	(*_rwakeup)(Rendez*, int, ulong);
496 
497 typedef struct RWLock RWLock;
498 struct RWLock
499 {
500 	Lock		l;
501 	int	readers;
502 	_Thread	*writer;
503 	_Threadlist	rwaiting;
504 	_Threadlist	wwaiting;
505 };
506 
507 extern	void	rlock(RWLock*);
508 extern	void	runlock(RWLock*);
509 extern	int		canrlock(RWLock*);
510 extern	void	wlock(RWLock*);
511 extern	void	wunlock(RWLock*);
512 extern	int		canwlock(RWLock*);
513 extern	int	(*_rlock)(RWLock*, int, ulong);	/* do not use */
514 extern	int	(*_wlock)(RWLock*, int, ulong);
515 extern	void	(*_runlock)(RWLock*, ulong);
516 extern	void	(*_wunlock)(RWLock*, ulong);
517 
518 /*
519  * per-process private data
520  */
521 extern	void**	privalloc(void);
522 extern	void	privfree(void**);
523 
524 /*
525  *  network dialing
526  */
527 #define NETPATHLEN 40
528 extern	int	p9accept(int, char*);
529 extern	int	p9announce(char*, char*);
530 extern	int	p9dial(char*, char*, char*, int*);
531 extern	int	p9dialparse(char *ds, char **net, char **unixa, u32int *ip, int *port);
532 extern	void	p9setnetmtpt(char*, int, char*);
533 extern	int	p9listen(char*, char*);
534 extern	char*	p9netmkaddr(char*, char*, char*);
535 extern	int	p9reject(int, char*, char*);
536 
537 #ifndef NOPLAN9DEFINES
538 #define	accept		p9accept
539 #define	announce	p9announce
540 #define	dial		p9dial
541 #define	setnetmtpt	p9setnetmtpt
542 #define	listen		p9listen
543 #define	netmkaddr	p9netmkaddr
544 #define	reject		p9reject
545 #endif
546 
547 /*
548  *  encryption
549  */
550 extern	int	pushssl(int, char*, char*, char*, int*);
551 extern	int	pushtls(int, char*, char*, int, char*, char*);
552 
553 /*
554  *  network services
555  */
556 typedef struct NetConnInfo NetConnInfo;
557 struct NetConnInfo
558 {
559 	char	*dir;		/* connection directory */
560 	char	*root;		/* network root */
561 	char	*spec;		/* binding spec */
562 	char	*lsys;		/* local system */
563 	char	*lserv;		/* local service */
564 	char	*rsys;		/* remote system */
565 	char	*rserv;		/* remote service */
566 	char *laddr;
567 	char *raddr;
568 };
569 extern	NetConnInfo*	getnetconninfo(char*, int);
570 extern	void		freenetconninfo(NetConnInfo*);
571 
572 /*
573  * system calls
574  *
575  */
576 #define	STATMAX	65535U	/* max length of machine-independent stat structure */
577 #define	DIRMAX	(sizeof(Dir)+STATMAX)	/* max length of Dir structure */
578 #define	ERRMAX	128	/* max length of error string */
579 
580 #define	MORDER	0x0003	/* mask for bits defining order of mounting */
581 #define	MREPL	0x0000	/* mount replaces object */
582 #define	MBEFORE	0x0001	/* mount goes before others in union directory */
583 #define	MAFTER	0x0002	/* mount goes after others in union directory */
584 #define	MCREATE	0x0004	/* permit creation in mounted directory */
585 #define	MCACHE	0x0010	/* cache some data */
586 #define	MMASK	0x0017	/* all bits on */
587 
588 #define	OREAD	0	/* open for read */
589 #define	OWRITE	1	/* write */
590 #define	ORDWR	2	/* read and write */
591 #define	OEXEC	3	/* execute, == read but check execute permission */
592 #define	OTRUNC	16	/* or'ed in (except for exec), truncate file first */
593 #define	OCEXEC	32	/* or'ed in, close on exec */
594 #define	ORCLOSE	64	/* or'ed in, remove on close */
595 #define	ODIRECT	128	/* or'ed in, direct access */
596 #define ONONBLOCK 256	/* or'ed in, non-blocking call */
597 #define	OEXCL	0x1000	/* or'ed in, exclusive use (create only) */
598 #define	OLOCK	0x2000	/* or'ed in, lock after opening */
599 #define	OAPPEND	0x4000	/* or'ed in, append only */
600 
601 #define	AEXIST	0	/* accessible: exists */
602 #define	AEXEC	1	/* execute access */
603 #define	AWRITE	2	/* write access */
604 #define	AREAD	4	/* read access */
605 
606 /* Segattch */
607 #define	SG_RONLY	0040	/* read only */
608 #define	SG_CEXEC	0100	/* detach on exec */
609 
610 #define	NCONT	0	/* continue after note */
611 #define	NDFLT	1	/* terminate after note */
612 #define	NSAVE	2	/* clear note but hold state */
613 #define	NRSTR	3	/* restore saved state */
614 
615 /* bits in Qid.type */
616 #define QTDIR		0x80		/* type bit for directories */
617 #define QTAPPEND	0x40		/* type bit for append only files */
618 #define QTEXCL		0x20		/* type bit for exclusive use files */
619 #define QTMOUNT		0x10		/* type bit for mounted channel */
620 #define QTAUTH		0x08		/* type bit for authentication file */
621 #define QTLINK		0x04		/* symbolic link */
622 #define QTFILE		0x00		/* plain file */
623 
624 /* bits in Dir.mode */
625 #define DMDIR		0x80000000	/* mode bit for directories */
626 #define DMAPPEND	0x40000000	/* mode bit for append only files */
627 #define DMEXCL		0x20000000	/* mode bit for exclusive use files */
628 #define DMMOUNT		0x10000000	/* mode bit for mounted channel */
629 #define DMAUTH		0x08000000	/* mode bit for authentication file */
630 #define DMDEVICE		0x00800000	/* mode bit for device files (Unix) */
631 #define DMSYMLINK	0x00400000	/* mode bit for symbolic links (Unix) */
632 #define DMNAMEDPIPE	0x00200000	/* mode bit for named pipes (Unix) */
633 #define DMSOCKET		0x00100000	/* mode bit for sockets (Unix) */
634 
635 #define DMREAD		0x4		/* mode bit for read permission */
636 #define DMWRITE		0x2		/* mode bit for write permission */
637 #define DMEXEC		0x1		/* mode bit for execute permission */
638 
639 #if defined(__FreeBSD__)
640 #undef RFFDG
641 #undef RFNOTEG
642 #undef RFPROC
643 #undef RFMEM
644 #undef RFNOWAIT
645 #undef RFCFDG
646 #undef RFNAMEG
647 #undef RFENVG
648 #undef RFCENVG
649 #undef RFCFDG
650 #undef RFCNAMEG
651 #endif
652 
653 enum
654 {
655 	RFNAMEG		= (1<<0), 
656 	RFENVG		= (1<<1), 
657 	RFFDG		= (1<<2),
658 	RFNOTEG		= (1<<3),
659 	RFPROC		= (1<<4),
660 	RFMEM		= (1<<5),
661 	RFNOWAIT	= (1<<6),
662 	RFCNAMEG	= (1<<10), 
663 	RFCENVG		= (1<<11), 
664 	RFCFDG		= (1<<12),
665 /*	RFREND		= (1<<13), */
666 /*	RFNOMNT		= (1<<14) */
667 };
668 
669 typedef
670 struct Qid
671 {
672 	uvlong	path;
673 	ulong	vers;
674 	uchar	type;
675 } Qid;
676 
677 typedef
678 struct Dir {
679 	/* system-modified data */
680 	ushort	type;	/* server type */
681 	uint	dev;	/* server subtype */
682 	/* file data */
683 	Qid	qid;	/* unique id from server */
684 	ulong	mode;	/* permissions */
685 	ulong	atime;	/* last read time */
686 	ulong	mtime;	/* last write time */
687 	vlong	length;	/* file length */
688 	char	*name;	/* last element of path */
689 	char	*uid;	/* owner name */
690 	char	*gid;	/* group name */
691 	char	*muid;	/* last modifier name */
692 } Dir;
693 
694 /* keep /sys/src/ape/lib/ap/plan9/sys9.h in sync with this -rsc */
695 typedef
696 struct Waitmsg
697 {
698 	int pid;	/* of loved one */
699 	ulong time[3];	/* of loved one & descendants */
700 	char	*msg;
701 } Waitmsg;
702 
703 typedef
704 struct IOchunk
705 {
706 	void	*addr;
707 	ulong	len;
708 } IOchunk;
709 
710 extern	void	_exits(char*);
711 
712 extern	void	abort(void);
713 /* extern	int	access(char*, int); */
714 extern	long	p9alarm(ulong);
715 extern	int	await(char*, int);
716 extern	int	awaitfor(int, char*, int);
717 extern	int	awaitnohang(char*, int);
718 /* extern	int	bind(char*, char*, int); give up */
719 /* extern	int	brk(void*); <unistd.h> */
720 extern	int	p9chdir(char*);
721 extern	int	close(int);
722 extern	int	p9create(char*, int, ulong);
723 extern	int	p9dup(int, int);
724 extern	int	errstr(char*, uint);
725 extern	int	p9exec(char*, char*[]);
726 extern	int	p9execl(char*, ...);
727 /* extern	int	p9fork(void); */
728 extern	int	p9rfork(int);
729 /* not implemented 
730 extern	int	fauth(int, char*);
731 extern	int	fstat(int, uchar*, int);
732 extern	int	fwstat(int, uchar*, int);
733 extern	int	fversion(int, int, char*, int);
734 extern	int	mount(int, int, char*, int, char*);
735 extern	int	unmount(char*, char*);
736 */
737 extern	int	noted(int);
738 extern	int	notify(void(*)(void*, char*));
739 extern	int	noteenable(char*);
740 extern	int	notedisable(char*);
741 extern	int	notifyon(char*);
742 extern	int	notifyoff(char*);
743 extern	int	p9open(char*, int);
744 extern	int	fd2path(int, char*, int);
745 extern	int	p9pipe(int*);
746 /* 
747  * use defs from <unistd.h>
748 extern	long	pread(int, void*, long, vlong);
749 extern	long	preadv(int, IOchunk*, int, vlong);
750 extern	long	pwrite(int, void*, long, vlong);
751 extern	long	pwritev(int, IOchunk*, int, vlong);
752 extern	long	read(int, void*, long);
753  */
754 extern	long	readn(int, void*, long);
755 /* extern	long	readv(int, IOchunk*, int); <unistd.h> */
756 extern	int	remove(const char*);
757 /* extern	void*	sbrk(ulong); <unistd.h> */
758 /* extern	long	oseek(int, long, int); */
759 extern	vlong	p9seek(int, vlong, int);
760 /* give up
761 extern	long	segattach(int, char*, void*, ulong);
762 extern	int	segbrk(void*, void*);
763 extern	int	segdetach(void*);
764 extern	int	segflush(void*, ulong);
765 extern	int	segfree(void*, ulong);
766 */
767 extern	int	p9sleep(long);
768 /* extern	int	stat(char*, uchar*, int); give up */
769 extern	Waitmsg*	p9wait(void);
770 extern	Waitmsg*	p9waitfor(int);
771 extern	Waitmsg*	waitnohang(void);
772 extern	int	p9waitpid(void);
773 /* <unistd.h>
774 extern	long	write(int, void*, long);
775 extern	long	writev(int, IOchunk*, int);
776 */
777 /* extern	int	wstat(char*, uchar*, int); give up */
778 extern	ulong	rendezvous(ulong, ulong);
779 
780 #ifndef NOPLAN9DEFINES
781 #define alarm		p9alarm
782 #define	dup		p9dup
783 #define	exec		p9exec
784 #define	execl	p9execl
785 #define	seek		p9seek
786 #define sleep		p9sleep
787 #define wait		p9wait
788 #define waitpid		p9waitpid
789 /* #define fork		p9fork */
790 #define rfork		p9rfork
791 /* #define access		p9access */
792 #define create		p9create
793 #undef open
794 #define open		p9open
795 #define pipe		p9pipe
796 #define	waitfor		p9waitfor
797 #endif
798 
799 extern	Dir*	dirstat(char*);
800 extern	Dir*	dirfstat(int);
801 extern	int	dirwstat(char*, Dir*);
802 extern	int	dirfwstat(int, Dir*);
803 extern	long	dirread(int, Dir**);
804 extern	void	nulldir(Dir*);
805 extern	long	dirreadall(int, Dir**);
806 /* extern	int	getpid(void); <unistd.h> */
807 /* extern	int	getppid(void); */
808 extern	void	rerrstr(char*, uint);
809 extern	char*	sysname(void);
810 extern	void	werrstr(char*, ...);
811 extern	char*	getns(void);
812 extern	char*	get9root(void);
813 extern	char*	unsharp(char*);
814 extern	int	sendfd(int, int);
815 extern	int	recvfd(int);
816 extern	int	post9pservice(int, char*);
817 
818 /* external names that we don't want to step on */
819 #ifndef NOPLAN9DEFINES
820 #define main	p9main
821 #endif
822 
823 /* compiler directives on plan 9 */
824 #define	SET(x)	((x)=0)
825 #define	USED(x)	if(x){}else{}
826 #ifdef __GNUC__
827 #	if __GNUC__ >= 3
828 #		undef USED
829 #		define USED(x) { ulong __y __attribute__ ((unused)); __y = (ulong)(x); }
830 #	endif
831 #endif
832 
833 /* command line */
834 extern char	*argv0;
835 extern void __fixargv0(void);
836 #define	ARGBEGIN	for((argv0?0:(argv0=(__fixargv0(),*argv))),argv++,argc--;\
837 			    argv[0] && argv[0][0]=='-' && argv[0][1];\
838 			    argc--, argv++) {\
839 				char *_args, *_argt;\
840 				Rune _argc;\
841 				_args = &argv[0][1];\
842 				if(_args[0]=='-' && _args[1]==0){\
843 					argc--; argv++; break;\
844 				}\
845 				_argc = 0;\
846 				while(*_args && (_args += chartorune(&_argc, _args)))\
847 				switch(_argc)
848 #define	ARGEND		SET(_argt);USED(_argt);USED(_argc);USED(_args);}USED(argv);USED(argc);
849 #define	ARGF()		(_argt=_args, _args="",\
850 				(*_argt? _argt: argv[1]? (argc--, *++argv): 0))
851 #define	EARGF(x)	(_argt=_args, _args="",\
852 				(*_argt? _argt: argv[1]? (argc--, *++argv): ((x), abort(), (char*)0)))
853 
854 #define	ARGC()		_argc
855 
856 #if defined(__cplusplus)
857 }
858 #endif
859 #endif	/* _LIB9_H_ */