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  /*
44 extern	char*	strdup(char*);
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 /*
117 extern	void	free(void*);
118 extern	ulong	msize(void*);
119 extern	void*	calloc(ulong, ulong);
120 extern	void*	realloc(void*, ulong);
121  */
122 extern	void		setmalloctag(void*, ulong);
123 extern	void		setrealloctag(void*, ulong);
124 extern	ulong	getmalloctag(void*);
125 extern	ulong	getrealloctag(void*);
126 /*
127 extern	void*	malloctopoolblock(void*);
128 */
129 #ifndef NOPLAN9DEFINES
130 #define	malloc	p9malloc
131 #endif
132 
133 /*
134  * print routines (provided by <fmt.h>)
135  *
136 typedef struct Fmt	Fmt;
137 struct Fmt{
138 	uchar	runes;
139 	void	*start;
140 	void	*to;
141 	void	*stop;
142 	int	(*flush)(Fmt *);
143 	void	*farg;
144 	int	nfmt;
145 	va_list	args;
146 	int	r;
147 	int	width;
148 	int	prec;
149 	ulong	flags;
150 };
151 
152 enum{
153 	FmtWidth	= 1,
154 	FmtLeft		= FmtWidth << 1,
155 	FmtPrec		= FmtLeft << 1,
156 	FmtSharp	= FmtPrec << 1,
157 	FmtSpace	= FmtSharp << 1,
158 	FmtSign		= FmtSpace << 1,
159 	FmtZero		= FmtSign << 1,
160 	FmtUnsigned	= FmtZero << 1,
161 	FmtShort	= FmtUnsigned << 1,
162 	FmtLong		= FmtShort << 1,
163 	FmtVLong	= FmtLong << 1,
164 	FmtComma	= FmtVLong << 1,
165 	FmtByte	= FmtComma << 1,
166 
167 	FmtFlag		= FmtByte << 1
168 };
169 
170 extern	int	print(char*, ...);
171 extern	char*	seprint(char*, char*, char*, ...);
172 extern	char*	vseprint(char*, char*, char*, va_list);
173 extern	int	snprint(char*, int, char*, ...);
174 extern	int	vsnprint(char*, int, char*, va_list);
175 extern	char*	smprint(char*, ...);
176 extern	char*	vsmprint(char*, va_list);
177 extern	int	sprint(char*, char*, ...);
178 extern	int	fprint(int, char*, ...);
179 extern	int	vfprint(int, char*, va_list);
180 
181 extern	int	runesprint(Rune*, char*, ...);
182 extern	int	runesnprint(Rune*, int, char*, ...);
183 extern	int	runevsnprint(Rune*, int, char*, va_list);
184 extern	Rune*	runeseprint(Rune*, Rune*, char*, ...);
185 extern	Rune*	runevseprint(Rune*, Rune*, char*, va_list);
186 extern	Rune*	runesmprint(char*, ...);
187 extern	Rune*	runevsmprint(char*, va_list);
188 
189 extern	int	fmtfdinit(Fmt*, int, char*, int);
190 extern	int	fmtfdflush(Fmt*);
191 extern	int	fmtstrinit(Fmt*);
192 extern	char*	fmtstrflush(Fmt*);
193 extern	int	runefmtstrinit(Fmt*);
194 extern	Rune*	runefmtstrflush(Fmt*);
195 
196 extern	int	fmtinstall(int, int (*)(Fmt*));
197 extern	int	dofmt(Fmt*, char*);
198 extern	int	dorfmt(Fmt*, Rune*);
199 extern	int	fmtprint(Fmt*, char*, ...);
200 extern	int	fmtvprint(Fmt*, char*, va_list);
201 extern	int	fmtrune(Fmt*, int);
202 extern	int	fmtstrcpy(Fmt*, char*);
203 extern	int	fmtrunestrcpy(Fmt*, Rune*);
204  */
205 
206 /*
207  * error string for %r
208  * supplied on per os basis, not part of fmt library
209  *
210  * (provided by lib9, but declared in fmt.h)
211  *
212 extern	int	errfmt(Fmt *f);
213  */
214 
215 /*
216  * quoted strings
217  */
218 extern	char	*unquotestrdup(char*);
219 extern	Rune	*unquoterunestrdup(Rune*);
220 extern	char	*quotestrdup(char*);
221 extern	Rune	*quoterunestrdup(Rune*);
222 /*
223  * in fmt.h
224  *
225 extern	void	quotefmtinstall(void);
226 extern	int	quotestrfmt(Fmt*);
227 extern	int	quoterunestrfmt(Fmt*);
228  */
229 #ifndef NOPLAN9DEFINES
230 #define doquote fmtdoquote
231 #endif
232 extern	int	needsrcquote(int);
233 
234 /*
235  * random number (in <stdlib.h>)
236  *
237 extern	void	srand(long);
238 extern	int	rand(void);
239  */
240 extern	int	nrand(int);
241 extern	long	lrand(void);
242 extern	long	lnrand(long);
243 extern	double	frand(void);
244 extern	ulong	truerand(void);			/* uses /dev/random */
245 extern	ulong	ntruerand(ulong);		/* uses /dev/random */
246 
247 /*
248  * math
249  */
250 extern	ulong	getfcr(void);
251 extern	void	setfsr(ulong);
252 extern	ulong	getfsr(void);
253 extern	void	setfcr(ulong);
254 extern	double	NaN(void);
255 extern	double	Inf(int);
256 extern	int	isNaN(double);
257 extern	int	isInf(double, int);
258 extern	ulong	umuldiv(ulong, ulong, ulong);
259 extern	long	muldiv(long, long, long);
260 
261 /*
262  * provided by math.h
263  *
264 extern	double	pow(double, double);
265 extern	double	atan2(double, double);
266 extern	double	fabs(double);
267 extern	double	atan(double);
268 extern	double	log(double);
269 extern	double	log10(double);
270 extern	double	exp(double);
271 extern	double	floor(double);
272 extern	double	ceil(double);
273 extern	double	hypot(double, double);
274 extern	double	sin(double);
275 extern	double	cos(double);
276 extern	double	tan(double);
277 extern	double	asin(double);
278 extern	double	acos(double);
279 extern	double	sinh(double);
280 extern	double	cosh(double);
281 extern	double	tanh(double);
282 extern	double	sqrt(double);
283 extern	double	fmod(double, double);
284 #define	HUGE	3.4028234e38
285 #define	PIO2	1.570796326794896619231e0
286 #define	PI	(PIO2+PIO2)
287  */
288 #define PI	M_PI
289 #define	PIO2	M_PI_2
290 
291 /*
292  * Time-of-day
293  */
294 
295 typedef
296 struct Tm
297 {
298 	int	sec;
299 	int	min;
300 	int	hour;
301 	int	mday;
302 	int	mon;
303 	int	year;
304 	int	wday;
305 	int	yday;
306 	char	zone[4];
307 	int	tzoff;
308 } Tm;
309 
310 extern	Tm*	p9gmtime(long);
311 extern	Tm*	p9localtime(long);
312 extern	char*	p9asctime(Tm*);
313 extern	char*	p9ctime(long);
314 extern	double	p9cputime(void);
315 extern	long	p9times(long*);
316 extern	long	p9tm2sec(Tm*);
317 extern	vlong	p9nsec(void);
318 
319 #ifndef NOPLAN9DEFINES
320 #define	gmtime		p9gmtime
321 #define	localtime	p9localtime
322 #define	asctime		p9asctime
323 #define	ctime		p9ctime
324 #define	cputime		p9cputime
325 #define	times		p9times
326 #define	tm2sec		p9tm2sec
327 #define	nsec		p9nsec
328 #endif
329 
330 /*
331  * one-of-a-kind
332  */
333 enum
334 {
335 	PNPROC		= 1,
336 	PNGROUP		= 2,
337 };
338 
339 /* extern	int	abs(int); <stdlib.h> */
340 extern	int	p9atexit(void(*)(void));
341 extern	void	p9atexitdont(void(*)(void));
342 extern	int	atnotify(int(*)(void*, char*), int);
343 /* 
344  * <stdlib.h>
345 extern	double	atof(char*); <stdlib.h>
346 extern	int	atoi(char*);
347 extern	long	atol(char*);
348  */
349 extern	vlong	atoll(const char*);
350 extern	double	charstod(int(*)(void*), void*);
351 extern	char*	cleanname(char*);
352 extern	int	p9decrypt(void*, void*, int);
353 extern	int	p9encrypt(void*, void*, int);
354 extern	int	dec64(uchar*, int, char*, int);
355 extern	int	enc64(char*, int, uchar*, int);
356 extern	int	dec32(uchar*, int, char*, int);
357 extern	int	enc32(char*, int, uchar*, int);
358 extern	int	dec16(uchar*, int, char*, int);
359 extern	int	enc16(char*, int, uchar*, int);
360 extern	int	encodefmt(Fmt*);
361 extern	int	dirmodefmt(Fmt*);
362 extern	void	exits(char*);
363 extern	double	frexp(double, int*);
364 extern	ulong	getcallerpc(void*);
365 extern	char*	p9getenv(char*);
366 extern	int	p9putenv(char*, char*);
367 extern	int	getfields(char*, char**, int, int, char*);
368 extern	int	gettokens(char *, char **, int, char *);
369 extern	char*	getuser(void);
370 extern	char*	p9getwd(char*, int);
371 extern	int	iounit(int);
372 /* extern	long	labs(long); <math.h> */
373 /* extern	double	ldexp(double, int); <math.h> */
374 extern	void	p9longjmp(p9jmp_buf, int);
375 extern	char*	mktemp(char*);
376 extern	int		opentemp(char*);
377 /* extern	double	modf(double, double*); <math.h> */
378 extern	int	netcrypt(void*, void*);
379 extern	void	p9notejmp(void*, p9jmp_buf, int);
380 extern	void	perror(const char*);
381 extern	int	postnote(int, int, char *);
382 extern	double	pow10(int);
383 /* extern	int	putenv(char*, char*); <stdlib.h. */
384 /* extern	void	qsort(void*, long, long, int (*)(void*, void*)); <stdlib.h> */
385 /* extern	int	p9setjmp(p9jmp_buf); */
386 #define p9setjmp(b)	sigsetjmp((void*)(b), 1)
387 /*
388  * <stdlib.h>
389 extern	double	strtod(char*, char**);
390 extern	long	strtol(char*, char**, int);
391 extern	ulong	strtoul(char*, char**, int);
392 extern	vlong	strtoll(char*, char**, int);
393 extern	uvlong	strtoull(char*, char**, int);
394  */
395 extern	void	sysfatal(char*, ...);
396 extern	void	p9syslog(int, char*, char*, ...);
397 extern	long	p9time(long*);
398 /* extern	int	tolower(int); <ctype.h> */
399 /* extern	int	toupper(int); <ctype.h> */
400 #ifndef NOPLAN9DEFINES
401 #define atexit		p9atexit
402 #define atexitdont	p9atexitdont
403 #define encrypt		p9encrypt
404 #define decrypt		p9decrypt
405 #define getenv		p9getenv
406 #define	getwd		p9getwd
407 #define	longjmp		p9longjmp
408 #undef  setjmp
409 #define setjmp		p9setjmp
410 #define putenv		p9putenv
411 #define notejmp		p9notejmp
412 #define jmp_buf		p9jmp_buf
413 #define syslog		p9syslog
414 #define time		p9time
415 #endif
416 
417 /*
418  *  synchronization
419  */
420 typedef
421 struct Lock {
422 	int	val;
423 } Lock;
424 
425 extern int	_tas(int*);
426 
427 extern	void	lock(Lock*);
428 extern	void	unlock(Lock*);
429 extern	int	canlock(Lock*);
430 
431 typedef struct QLp QLp;
432 struct QLp
433 {
434 	int	inuse;
435 	QLp	*next;
436 	char	state;
437 };
438 
439 typedef
440 struct QLock
441 {
442 	Lock	lock;
443 	int	locked;
444 	QLp	*head;
445 	QLp 	*tail;
446 } QLock;
447 
448 extern	void	qlock(QLock*);
449 extern	void	qunlock(QLock*);
450 extern	int	canqlock(QLock*);
451 extern	void	_qlockinit(ulong (*)(ulong, ulong));	/* called only by the thread library */
452 
453 typedef
454 struct RWLock
455 {
456 	Lock	lock;
457 	int	readers;	/* number of readers */
458 	int	writer;		/* number of writers */
459 	QLp	*head;		/* list of waiting processes */
460 	QLp	*tail;
461 } RWLock;
462 
463 extern	void	rlock(RWLock*);
464 extern	void	runlock(RWLock*);
465 extern	int		canrlock(RWLock*);
466 extern	void	wlock(RWLock*);
467 extern	void	wunlock(RWLock*);
468 extern	int		canwlock(RWLock*);
469 
470 typedef
471 struct Rendez
472 {
473 	QLock *l;
474 	QLp	*head;
475 	QLp	*tail;
476 } Rendez;
477 
478 extern	void	rsleep(Rendez*);	/* unlocks r->l, sleeps, locks r->l again */
479 extern	int	rwakeup(Rendez*);
480 extern	int	rwakeupall(Rendez*);
481 extern	void**	privalloc(void);
482 extern	void	privfree(void**);
483 
484 /*
485  *  network dialing
486  */
487 #define NETPATHLEN 40
488 extern	int	p9accept(int, char*);
489 extern	int	p9announce(char*, char*);
490 extern	int	p9dial(char*, char*, char*, int*);
491 extern	void	p9setnetmtpt(char*, int, char*);
492 extern	int	p9hangup(int);
493 extern	int	p9listen(char*, char*);
494 extern	char*	p9netmkaddr(char*, char*, char*);
495 extern	int	p9reject(int, char*, char*);
496 
497 #ifndef NOPLAN9DEFINES
498 #define	accept		p9accept
499 #define	announce	p9announce
500 #define	dial		p9dial
501 #define	setnetmtpt	p9setnetmtpt
502 #define	hangup		p9hangup
503 #define	listen		p9listen
504 #define	netmkaddr	p9netmkaddr
505 #define	reject		p9reject
506 #endif
507 
508 /*
509  *  encryption
510  */
511 extern	int	pushssl(int, char*, char*, char*, int*);
512 extern	int	pushtls(int, char*, char*, int, char*, char*);
513 
514 /*
515  *  network services
516  */
517 typedef struct NetConnInfo NetConnInfo;
518 struct NetConnInfo
519 {
520 	char	*dir;		/* connection directory */
521 	char	*root;		/* network root */
522 	char	*spec;		/* binding spec */
523 	char	*lsys;		/* local system */
524 	char	*lserv;		/* local service */
525 	char	*rsys;		/* remote system */
526 	char	*rserv;		/* remote service */
527 };
528 extern	NetConnInfo*	getnetconninfo(char*, int);
529 extern	void		freenetconninfo(NetConnInfo*);
530 
531 /*
532  * system calls
533  *
534  */
535 #define	STATMAX	65535U	/* max length of machine-independent stat structure */
536 #define	DIRMAX	(sizeof(Dir)+STATMAX)	/* max length of Dir structure */
537 #define	ERRMAX	128	/* max length of error string */
538 
539 #define	MORDER	0x0003	/* mask for bits defining order of mounting */
540 #define	MREPL	0x0000	/* mount replaces object */
541 #define	MBEFORE	0x0001	/* mount goes before others in union directory */
542 #define	MAFTER	0x0002	/* mount goes after others in union directory */
543 #define	MCREATE	0x0004	/* permit creation in mounted directory */
544 #define	MCACHE	0x0010	/* cache some data */
545 #define	MMASK	0x0017	/* all bits on */
546 
547 #define	OREAD	0	/* open for read */
548 #define	OWRITE	1	/* write */
549 #define	ORDWR	2	/* read and write */
550 #define	OEXEC	3	/* execute, == read but check execute permission */
551 #define	OTRUNC	16	/* or'ed in (except for exec), truncate file first */
552 #define	OCEXEC	32	/* or'ed in, close on exec */
553 #define	ORCLOSE	64	/* or'ed in, remove on close */
554 #define	OEXCL	0x1000	/* or'ed in, exclusive use (create only) */
555 
556 #define	AEXIST	0	/* accessible: exists */
557 #define	AEXEC	1	/* execute access */
558 #define	AWRITE	2	/* write access */
559 #define	AREAD	4	/* read access */
560 
561 /* Segattch */
562 #define	SG_RONLY	0040	/* read only */
563 #define	SG_CEXEC	0100	/* detach on exec */
564 
565 #define	NCONT	0	/* continue after note */
566 #define	NDFLT	1	/* terminate after note */
567 #define	NSAVE	2	/* clear note but hold state */
568 #define	NRSTR	3	/* restore saved state */
569 
570 /* bits in Qid.type */
571 #define QTDIR		0x80		/* type bit for directories */
572 #define QTAPPEND	0x40		/* type bit for append only files */
573 #define QTEXCL		0x20		/* type bit for exclusive use files */
574 #define QTMOUNT		0x10		/* type bit for mounted channel */
575 #define QTAUTH		0x08		/* type bit for authentication file */
576 #define QTFILE		0x00		/* plain file */
577 
578 /* bits in Dir.mode */
579 #define DMDIR		0x80000000	/* mode bit for directories */
580 #define DMAPPEND	0x40000000	/* mode bit for append only files */
581 #define DMEXCL		0x20000000	/* mode bit for exclusive use files */
582 #define DMMOUNT		0x10000000	/* mode bit for mounted channel */
583 #define DMAUTH		0x08000000	/* mode bit for authentication file */
584 #define DMREAD		0x4		/* mode bit for read permission */
585 #define DMWRITE		0x2		/* mode bit for write permission */
586 #define DMEXEC		0x1		/* mode bit for execute permission */
587 
588 #if defined(__FreeBSD__)
589 #undef RFFDG
590 #undef RFNOTEG
591 #undef RFPROC
592 #undef RFMEM
593 #undef RFNOWAIT
594 #undef RFCFDG
595 #undef RFNAMEG
596 #undef RFENVG
597 #undef RFCENVG
598 #undef RFCFDG
599 #undef RFCNAMEG
600 #endif
601 
602 enum
603 {
604 	RFNAMEG		= (1<<0), 
605 	RFENVG		= (1<<1), 
606 	RFFDG		= (1<<2),
607 	RFNOTEG		= (1<<3),
608 	RFPROC		= (1<<4),
609 	RFMEM		= (1<<5),
610 	RFNOWAIT	= (1<<6),
611 	RFCNAMEG	= (1<<10), 
612 	RFCENVG		= (1<<11), 
613 	RFCFDG		= (1<<12),
614 /*	RFREND		= (1<<13), */
615 /*	RFNOMNT		= (1<<14) */
616 };
617 
618 extern int		ffork(int, void(*)(void*), void*);
619 
620 typedef
621 struct Qid
622 {
623 	uvlong	path;
624 	ulong	vers;
625 	uchar	type;
626 } Qid;
627 
628 typedef
629 struct Dir {
630 	/* system-modified data */
631 	ushort	type;	/* server type */
632 	uint	dev;	/* server subtype */
633 	/* file data */
634 	Qid	qid;	/* unique id from server */
635 	ulong	mode;	/* permissions */
636 	ulong	atime;	/* last read time */
637 	ulong	mtime;	/* last write time */
638 	vlong	length;	/* file length */
639 	char	*name;	/* last element of path */
640 	char	*uid;	/* owner name */
641 	char	*gid;	/* group name */
642 	char	*muid;	/* last modifier name */
643 } Dir;
644 
645 /* keep /sys/src/ape/lib/ap/plan9/sys9.h in sync with this -rsc */
646 typedef
647 struct Waitmsg
648 {
649 	int pid;	/* of loved one */
650 	ulong time[3];	/* of loved one & descendants */
651 	char	*msg;
652 } Waitmsg;
653 
654 typedef
655 struct IOchunk
656 {
657 	void	*addr;
658 	ulong	len;
659 } IOchunk;
660 
661 extern	void	_exits(char*);
662 
663 extern	void	abort(void);
664 /* extern	int	access(char*, int); */
665 extern	long	p9alarm(ulong);
666 extern	int	await(char*, int);
667 extern	int	awaitnohang(char*, int);
668 /* extern	int	bind(char*, char*, int); give up */
669 /* extern	int	brk(void*); <unistd.h> */
670 extern	int	p9chdir(char*);
671 extern	int	close(int);
672 extern	int	p9create(char*, int, ulong);
673 extern	int	p9dup(int, int);
674 extern	int	errstr(char*, uint);
675 extern	int	p9exec(char*, char*[]);
676 /* extern	int	execl(char*, ...); <unistd.h> */
677 /* extern	int	fork(void); <unistd.h> */
678 extern	int	p9rfork(int);
679 /* not implemented 
680 extern	int	fauth(int, char*);
681 extern	int	fstat(int, uchar*, int);
682 extern	int	fwstat(int, uchar*, int);
683 extern	int	fversion(int, int, char*, int);
684 extern	int	mount(int, int, char*, int, char*);
685 extern	int	unmount(char*, char*);
686 */
687 extern	int	noted(int);
688 extern	int	notify(void(*)(void*, char*));
689 extern	int	p9open(char*, int);
690 extern	int	fd2path(int, char*, int);
691 extern	int	p9pipe(int*);
692 /* 
693  * use defs from <unistd.h>
694 extern	long	pread(int, void*, long, vlong);
695 extern	long	preadv(int, IOchunk*, int, vlong);
696 extern	long	pwrite(int, void*, long, vlong);
697 extern	long	pwritev(int, IOchunk*, int, vlong);
698 extern	long	read(int, void*, long);
699  */
700 extern	long	readn(int, void*, long);
701 /* extern	long	readv(int, IOchunk*, int); <unistd.h> */
702 extern	int	remove(const char*);
703 /* extern	void*	sbrk(ulong); <unistd.h> */
704 /* extern	long	oseek(int, long, int); */
705 extern	vlong	p9seek(int, vlong, int);
706 /* give up
707 extern	long	segattach(int, char*, void*, ulong);
708 extern	int	segbrk(void*, void*);
709 extern	int	segdetach(void*);
710 extern	int	segflush(void*, ulong);
711 extern	int	segfree(void*, ulong);
712 */
713 extern	int	p9sleep(long);
714 /* extern	int	stat(char*, uchar*, int); give up */
715 extern	Waitmsg*	p9wait(void);
716 extern	Waitmsg*	waitnohang(void);
717 extern	int	p9waitpid(void);
718 /* <unistd.h>
719 extern	long	write(int, void*, long);
720 extern	long	writev(int, IOchunk*, int);
721 */
722 /* extern	int	wstat(char*, uchar*, int); give up */
723 extern	ulong	rendezvous(ulong, ulong);
724 
725 #ifndef NOPLAN9DEFINES
726 #define alarm		p9alarm
727 #define	dup		p9dup
728 #define	exec		p9exec
729 #define	seek		p9seek
730 #define sleep		p9sleep
731 #define wait		p9wait
732 #define waitpid		p9waitpid
733 #define rfork		p9rfork
734 /* #define access		p9access */
735 #define create		p9create
736 #define open		p9open
737 #define pipe		p9pipe
738 #endif
739 
740 extern	Dir*	dirstat(char*);
741 extern	Dir*	dirfstat(int);
742 extern	int	dirwstat(char*, Dir*);
743 extern	int	dirfwstat(int, Dir*);
744 extern	long	dirread(int, Dir**);
745 extern	void	nulldir(Dir*);
746 extern	long	dirreadall(int, Dir**);
747 /* extern	int	getpid(void); <unistd.h> */
748 /* extern	int	getppid(void); */
749 extern	void	rerrstr(char*, uint);
750 extern	char*	sysname(void);
751 extern	void	werrstr(char*, ...);
752 extern	char*	getns(void);
753 extern	char*	get9root(void);
754 extern	char*	unsharp(char*);
755 extern	int	sendfd(int, int);
756 extern	int	recvfd(int);
757 extern	int	post9pservice(int, char*);
758 
759 /* external names that we don't want to step on */
760 #ifndef NOPLAN9DEFINES
761 #define main	p9main
762 #endif
763 
764 /* compiler directives on plan 9 */
765 #define	USED(x)	if(x){}else{}
766 #define	SET(x)	((x)=0)
767 
768 /* command line */
769 extern char	*argv0;
770 extern void __fixargv0(void);
771 #define	ARGBEGIN	for((argv0?0:(argv0=(__fixargv0(),*argv))),argv++,argc--;\
772 			    argv[0] && argv[0][0]=='-' && argv[0][1];\
773 			    argc--, argv++) {\
774 				char *_args, *_argt;\
775 				Rune _argc;\
776 				_args = &argv[0][1];\
777 				if(_args[0]=='-' && _args[1]==0){\
778 					argc--; argv++; break;\
779 				}\
780 				_argc = 0;\
781 				while(*_args && (_args += chartorune(&_argc, _args)))\
782 				switch(_argc)
783 #define	ARGEND		SET(_argt);USED(_argt);USED(_argc);USED(_args);}USED(argv);USED(argc);
784 #define	ARGF()		(_argt=_args, _args="",\
785 				(*_argt? _argt: argv[1]? (argc--, *++argv): 0))
786 #define	EARGF(x)	(_argt=_args, _args="",\
787 				(*_argt? _argt: argv[1]? (argc--, *++argv): ((x), abort(), (char*)0)))
788 
789 #define	ARGC()		_argc
790 
791 #if defined(__cplusplus)
792 }
793 #endif
794 #endif	/* _LIB9_H_ */