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 (in <stdlib.h>)
238  *
239 extern	void	srand(long);
240 extern	int	rand(void);
241  */
242 extern	int	nrand(int);
243 extern	long	lrand(void);
244 extern	long	lnrand(long);
245 extern	double	frand(void);
246 extern	ulong	truerand(void);			/* uses /dev/random */
247 extern	ulong	ntruerand(ulong);		/* uses /dev/random */
248 
249 /*
250  * math
251  */
252 extern	ulong	getfcr(void);
253 extern	void	setfsr(ulong);
254 extern	ulong	getfsr(void);
255 extern	void	setfcr(ulong);
256 extern	double	NaN(void);
257 extern	double	Inf(int);
258 extern	int	isNaN(double);
259 extern	int	isInf(double, int);
260 extern	ulong	umuldiv(ulong, ulong, ulong);
261 extern	long	muldiv(long, long, long);
262 
263 /*
264  * provided by math.h
265  *
266 extern	double	pow(double, double);
267 extern	double	atan2(double, double);
268 extern	double	fabs(double);
269 extern	double	atan(double);
270 extern	double	log(double);
271 extern	double	log10(double);
272 extern	double	exp(double);
273 extern	double	floor(double);
274 extern	double	ceil(double);
275 extern	double	hypot(double, double);
276 extern	double	sin(double);
277 extern	double	cos(double);
278 extern	double	tan(double);
279 extern	double	asin(double);
280 extern	double	acos(double);
281 extern	double	sinh(double);
282 extern	double	cosh(double);
283 extern	double	tanh(double);
284 extern	double	sqrt(double);
285 extern	double	fmod(double, double);
286 #define	HUGE	3.4028234e38
287 #define	PIO2	1.570796326794896619231e0
288 #define	PI	(PIO2+PIO2)
289  */
290 #define PI	M_PI
291 #define	PIO2	M_PI_2
292 
293 /*
294  * Time-of-day
295  */
296 
297 typedef
298 struct Tm
299 {
300 	int	sec;
301 	int	min;
302 	int	hour;
303 	int	mday;
304 	int	mon;
305 	int	year;
306 	int	wday;
307 	int	yday;
308 	char	zone[4];
309 	int	tzoff;
310 } Tm;
311 
312 extern	Tm*	p9gmtime(long);
313 extern	Tm*	p9localtime(long);
314 extern	char*	p9asctime(Tm*);
315 extern	char*	p9ctime(long);
316 extern	double	p9cputime(void);
317 extern	long	p9times(long*);
318 extern	long	p9tm2sec(Tm*);
319 extern	vlong	p9nsec(void);
320 
321 #ifndef NOPLAN9DEFINES
322 #define	gmtime		p9gmtime
323 #define	localtime	p9localtime
324 #define	asctime		p9asctime
325 #define	ctime		p9ctime
326 #define	cputime		p9cputime
327 #define	times		p9times
328 #define	tm2sec		p9tm2sec
329 #define	nsec		p9nsec
330 #endif
331 
332 /*
333  * one-of-a-kind
334  */
335 enum
336 {
337 	PNPROC		= 1,
338 	PNGROUP		= 2,
339 };
340 
341 /* extern	int	abs(int); <stdlib.h> */
342 extern	int	p9atexit(void(*)(void));
343 extern	void	p9atexitdont(void(*)(void));
344 extern	int	atnotify(int(*)(void*, char*), int);
345 /* 
346  * <stdlib.h>
347 extern	double	atof(char*); <stdlib.h>
348  */
349 extern	int	p9atoi(char*);
350 extern	long	p9atol(char*);
351 extern	vlong	p9atoll(char*);
352 extern	double	charstod(int(*)(void*), void*);
353 extern	char*	cleanname(char*);
354 extern	int	p9decrypt(void*, void*, int);
355 extern	int	p9encrypt(void*, void*, int);
356 extern	int	dec64(uchar*, int, char*, int);
357 extern	int	enc64(char*, int, uchar*, int);
358 extern	int	dec32(uchar*, int, char*, int);
359 extern	int	enc32(char*, int, uchar*, int);
360 extern	int	dec16(uchar*, int, char*, int);
361 extern	int	enc16(char*, int, uchar*, int);
362 extern	int	encodefmt(Fmt*);
363 extern	int	dirmodefmt(Fmt*);
364 extern	void	exits(char*);
365 extern	double	frexp(double, int*);
366 extern	ulong	getcallerpc(void*);
367 extern	char*	p9getenv(char*);
368 extern	int	p9putenv(char*, char*);
369 extern	int	getfields(char*, char**, int, int, char*);
370 extern	int	gettokens(char *, char **, int, char *);
371 extern	char*	getuser(void);
372 extern	char*	p9getwd(char*, int);
373 extern	int	iounit(int);
374 /* extern	long	labs(long); <math.h> */
375 /* extern	double	ldexp(double, int); <math.h> */
376 extern	void	p9longjmp(p9jmp_buf, int);
377 extern	char*	mktemp(char*);
378 extern	int		opentemp(char*);
379 /* extern	double	modf(double, double*); <math.h> */
380 extern	int	netcrypt(void*, void*);
381 extern	void	p9notejmp(void*, p9jmp_buf, int);
382 extern	void	perror(const char*);
383 extern	int	postnote(int, int, char *);
384 extern	double	p9pow10(int);
385 /* extern	int	putenv(char*, char*); <stdlib.h. */
386 /* extern	void	qsort(void*, long, long, int (*)(void*, void*)); <stdlib.h> */
387 /* extern	int	p9setjmp(p9jmp_buf); */
388 #define p9setjmp(b)	sigsetjmp((void*)(b), 1)
389 /*
390  * <stdlib.h>
391 extern	double	strtod(char*, char**);
392 extern	long	strtol(char*, char**, int);
393 extern	ulong	strtoul(char*, char**, int);
394 extern	vlong	strtoll(char*, char**, int);
395 extern	uvlong	strtoull(char*, char**, int);
396  */
397 extern	void	sysfatal(char*, ...);
398 extern	void	p9syslog(int, char*, char*, ...);
399 extern	long	p9time(long*);
400 /* extern	int	tolower(int); <ctype.h> */
401 /* extern	int	toupper(int); <ctype.h> */
402 extern	void	needstack(int);
403 
404 #ifndef NOPLAN9DEFINES
405 #define atexit		p9atexit
406 #define atexitdont	p9atexitdont
407 #define atoi		p9atoi
408 #define atol		p9atol
409 #define atoll		p9atoll
410 #define encrypt		p9encrypt
411 #define decrypt		p9decrypt
412 #define getenv		p9getenv
413 #define	getwd		p9getwd
414 #define	longjmp		p9longjmp
415 #undef  setjmp
416 #define setjmp		p9setjmp
417 #define putenv		p9putenv
418 #define notejmp		p9notejmp
419 #define jmp_buf		p9jmp_buf
420 #define syslog		p9syslog
421 #define time		p9time
422 #define pow10		p9pow10
423 #endif
424 
425 /*
426  *  synchronization
427  */
428 typedef
429 struct Lock {
430 	int	val;
431 } Lock;
432 
433 extern int	_tas(int*);
434 
435 extern	void	lock(Lock*);
436 extern	void	unlock(Lock*);
437 extern	int	canlock(Lock*);
438 
439 typedef struct QLp QLp;
440 struct QLp
441 {
442 	int	inuse;
443 	QLp	*next;
444 	char	state;
445 };
446 
447 typedef
448 struct QLock
449 {
450 	Lock	lock;
451 	int	locked;
452 	QLp	*head;
453 	QLp 	*tail;
454 } QLock;
455 
456 extern	void	qlock(QLock*);
457 extern	void	qunlock(QLock*);
458 extern	int	canqlock(QLock*);
459 extern	void	_qlockinit(ulong (*)(ulong, ulong));	/* called only by the thread library */
460 
461 typedef
462 struct RWLock
463 {
464 	Lock	lock;
465 	int	readers;	/* number of readers */
466 	int	writer;		/* number of writers */
467 	QLp	*head;		/* list of waiting processes */
468 	QLp	*tail;
469 } RWLock;
470 
471 extern	void	rlock(RWLock*);
472 extern	void	runlock(RWLock*);
473 extern	int		canrlock(RWLock*);
474 extern	void	wlock(RWLock*);
475 extern	void	wunlock(RWLock*);
476 extern	int		canwlock(RWLock*);
477 
478 typedef
479 struct Rendez
480 {
481 	QLock *l;
482 	QLp	*head;
483 	QLp	*tail;
484 } Rendez;
485 
486 extern	void	rsleep(Rendez*);	/* unlocks r->l, sleeps, locks r->l again */
487 extern	int	rwakeup(Rendez*);
488 extern	int	rwakeupall(Rendez*);
489 extern	void**	privalloc(void);
490 extern	void	privfree(void**);
491 
492 /*
493  *  network dialing
494  */
495 #define NETPATHLEN 40
496 extern	int	p9accept(int, char*);
497 extern	int	p9announce(char*, char*);
498 extern	int	p9dial(char*, char*, char*, int*);
499 extern	void	p9setnetmtpt(char*, int, char*);
500 extern	int	p9hangup(int);
501 extern	int	p9listen(char*, char*);
502 extern	char*	p9netmkaddr(char*, char*, char*);
503 extern	int	p9reject(int, char*, char*);
504 
505 #ifndef NOPLAN9DEFINES
506 #define	accept		p9accept
507 #define	announce	p9announce
508 #define	dial		p9dial
509 #define	setnetmtpt	p9setnetmtpt
510 #define	hangup		p9hangup
511 #define	listen		p9listen
512 #define	netmkaddr	p9netmkaddr
513 #define	reject		p9reject
514 #endif
515 
516 /*
517  *  encryption
518  */
519 extern	int	pushssl(int, char*, char*, char*, int*);
520 extern	int	pushtls(int, char*, char*, int, char*, char*);
521 
522 /*
523  *  network services
524  */
525 typedef struct NetConnInfo NetConnInfo;
526 struct NetConnInfo
527 {
528 	char	*dir;		/* connection directory */
529 	char	*root;		/* network root */
530 	char	*spec;		/* binding spec */
531 	char	*lsys;		/* local system */
532 	char	*lserv;		/* local service */
533 	char	*rsys;		/* remote system */
534 	char	*rserv;		/* remote service */
535 };
536 extern	NetConnInfo*	getnetconninfo(char*, int);
537 extern	void		freenetconninfo(NetConnInfo*);
538 
539 /*
540  * system calls
541  *
542  */
543 #define	STATMAX	65535U	/* max length of machine-independent stat structure */
544 #define	DIRMAX	(sizeof(Dir)+STATMAX)	/* max length of Dir structure */
545 #define	ERRMAX	128	/* max length of error string */
546 
547 #define	MORDER	0x0003	/* mask for bits defining order of mounting */
548 #define	MREPL	0x0000	/* mount replaces object */
549 #define	MBEFORE	0x0001	/* mount goes before others in union directory */
550 #define	MAFTER	0x0002	/* mount goes after others in union directory */
551 #define	MCREATE	0x0004	/* permit creation in mounted directory */
552 #define	MCACHE	0x0010	/* cache some data */
553 #define	MMASK	0x0017	/* all bits on */
554 
555 #define	OREAD	0	/* open for read */
556 #define	OWRITE	1	/* write */
557 #define	ORDWR	2	/* read and write */
558 #define	OEXEC	3	/* execute, == read but check execute permission */
559 #define	OTRUNC	16	/* or'ed in (except for exec), truncate file first */
560 #define	OCEXEC	32	/* or'ed in, close on exec */
561 #define	ORCLOSE	64	/* or'ed in, remove on close */
562 #define	ODIRECT	128	/* or'ed in, bypass the cache */
563 #define	OEXCL	0x1000	/* or'ed in, exclusive use (create only) */
564 
565 #define	AEXIST	0	/* accessible: exists */
566 #define	AEXEC	1	/* execute access */
567 #define	AWRITE	2	/* write access */
568 #define	AREAD	4	/* read access */
569 
570 /* Segattch */
571 #define	SG_RONLY	0040	/* read only */
572 #define	SG_CEXEC	0100	/* detach on exec */
573 
574 #define	NCONT	0	/* continue after note */
575 #define	NDFLT	1	/* terminate after note */
576 #define	NSAVE	2	/* clear note but hold state */
577 #define	NRSTR	3	/* restore saved state */
578 
579 /* bits in Qid.type */
580 #define QTDIR		0x80		/* type bit for directories */
581 #define QTAPPEND	0x40		/* type bit for append only files */
582 #define QTEXCL		0x20		/* type bit for exclusive use files */
583 #define QTMOUNT		0x10		/* type bit for mounted channel */
584 #define QTAUTH		0x08		/* type bit for authentication file */
585 #define QTFILE		0x00		/* plain file */
586 
587 /* bits in Dir.mode */
588 #define DMDIR		0x80000000	/* mode bit for directories */
589 #define DMAPPEND	0x40000000	/* mode bit for append only files */
590 #define DMEXCL		0x20000000	/* mode bit for exclusive use files */
591 #define DMMOUNT		0x10000000	/* mode bit for mounted channel */
592 #define DMAUTH		0x08000000	/* mode bit for authentication file */
593 #define DMREAD		0x4		/* mode bit for read permission */
594 #define DMWRITE		0x2		/* mode bit for write permission */
595 #define DMEXEC		0x1		/* mode bit for execute permission */
596 
597 #if defined(__FreeBSD__)
598 #undef RFFDG
599 #undef RFNOTEG
600 #undef RFPROC
601 #undef RFMEM
602 #undef RFNOWAIT
603 #undef RFCFDG
604 #undef RFNAMEG
605 #undef RFENVG
606 #undef RFCENVG
607 #undef RFCFDG
608 #undef RFCNAMEG
609 #endif
610 
611 enum
612 {
613 	RFNAMEG		= (1<<0), 
614 	RFENVG		= (1<<1), 
615 	RFFDG		= (1<<2),
616 	RFNOTEG		= (1<<3),
617 	RFPROC		= (1<<4),
618 	RFMEM		= (1<<5),
619 	RFNOWAIT	= (1<<6),
620 	RFCNAMEG	= (1<<10), 
621 	RFCENVG		= (1<<11), 
622 	RFCFDG		= (1<<12),
623 /*	RFREND		= (1<<13), */
624 /*	RFNOMNT		= (1<<14) */
625 };
626 
627 extern int		ffork(int, void(*)(void*), void*);
628 
629 typedef
630 struct Qid
631 {
632 	uvlong	path;
633 	ulong	vers;
634 	uchar	type;
635 } Qid;
636 
637 typedef
638 struct Dir {
639 	/* system-modified data */
640 	ushort	type;	/* server type */
641 	uint	dev;	/* server subtype */
642 	/* file data */
643 	Qid	qid;	/* unique id from server */
644 	ulong	mode;	/* permissions */
645 	ulong	atime;	/* last read time */
646 	ulong	mtime;	/* last write time */
647 	vlong	length;	/* file length */
648 	char	*name;	/* last element of path */
649 	char	*uid;	/* owner name */
650 	char	*gid;	/* group name */
651 	char	*muid;	/* last modifier name */
652 } Dir;
653 
654 /* keep /sys/src/ape/lib/ap/plan9/sys9.h in sync with this -rsc */
655 typedef
656 struct Waitmsg
657 {
658 	int pid;	/* of loved one */
659 	ulong time[3];	/* of loved one & descendants */
660 	char	*msg;
661 } Waitmsg;
662 
663 typedef
664 struct IOchunk
665 {
666 	void	*addr;
667 	ulong	len;
668 } IOchunk;
669 
670 extern	void	_exits(char*);
671 
672 extern	void	abort(void);
673 /* extern	int	access(char*, int); */
674 extern	long	p9alarm(ulong);
675 extern	int	await(char*, int);
676 extern	int	awaitnohang(char*, int);
677 /* extern	int	bind(char*, char*, int); give up */
678 /* extern	int	brk(void*); <unistd.h> */
679 extern	int	p9chdir(char*);
680 extern	int	close(int);
681 extern	int	p9create(char*, int, ulong);
682 extern	int	p9dup(int, int);
683 extern	int	errstr(char*, uint);
684 extern	int	p9exec(char*, char*[]);
685 /* extern	int	execl(char*, ...); <unistd.h> */
686 extern	int	p9fork(void);
687 extern	int	p9rfork(int);
688 /* not implemented 
689 extern	int	fauth(int, char*);
690 extern	int	fstat(int, uchar*, int);
691 extern	int	fwstat(int, uchar*, int);
692 extern	int	fversion(int, int, char*, int);
693 extern	int	mount(int, int, char*, int, char*);
694 extern	int	unmount(char*, char*);
695 */
696 extern	int	noted(int);
697 extern	int	notify(void(*)(void*, char*));
698 extern	int	p9open(char*, int);
699 extern	int	fd2path(int, char*, int);
700 extern	int	p9pipe(int*);
701 /* 
702  * use defs from <unistd.h>
703 extern	long	pread(int, void*, long, vlong);
704 extern	long	preadv(int, IOchunk*, int, vlong);
705 extern	long	pwrite(int, void*, long, vlong);
706 extern	long	pwritev(int, IOchunk*, int, vlong);
707 extern	long	read(int, void*, long);
708  */
709 extern	long	readn(int, void*, long);
710 /* extern	long	readv(int, IOchunk*, int); <unistd.h> */
711 extern	int	remove(const char*);
712 /* extern	void*	sbrk(ulong); <unistd.h> */
713 /* extern	long	oseek(int, long, int); */
714 extern	vlong	p9seek(int, vlong, int);
715 /* give up
716 extern	long	segattach(int, char*, void*, ulong);
717 extern	int	segbrk(void*, void*);
718 extern	int	segdetach(void*);
719 extern	int	segflush(void*, ulong);
720 extern	int	segfree(void*, ulong);
721 */
722 extern	int	p9sleep(long);
723 /* extern	int	stat(char*, uchar*, int); give up */
724 extern	Waitmsg*	p9wait(void);
725 extern	Waitmsg*	waitnohang(void);
726 extern	int	p9waitpid(void);
727 /* <unistd.h>
728 extern	long	write(int, void*, long);
729 extern	long	writev(int, IOchunk*, int);
730 */
731 /* extern	int	wstat(char*, uchar*, int); give up */
732 extern	ulong	rendezvous(ulong, ulong);
733 
734 #ifndef NOPLAN9DEFINES
735 #define alarm		p9alarm
736 #define	dup		p9dup
737 #define	exec		p9exec
738 #define	seek		p9seek
739 #define sleep		p9sleep
740 #define wait		p9wait
741 #define waitpid		p9waitpid
742 #define fork		p9fork
743 #define rfork		p9rfork
744 /* #define access		p9access */
745 #define create		p9create
746 #define open		p9open
747 #define pipe		p9pipe
748 #endif
749 
750 extern	Dir*	dirstat(char*);
751 extern	Dir*	dirfstat(int);
752 extern	int	dirwstat(char*, Dir*);
753 extern	int	dirfwstat(int, Dir*);
754 extern	long	dirread(int, Dir**);
755 extern	void	nulldir(Dir*);
756 extern	long	dirreadall(int, Dir**);
757 /* extern	int	getpid(void); <unistd.h> */
758 /* extern	int	getppid(void); */
759 extern	void	rerrstr(char*, uint);
760 extern	char*	sysname(void);
761 extern	void	werrstr(char*, ...);
762 extern	char*	getns(void);
763 extern	char*	get9root(void);
764 extern	char*	unsharp(char*);
765 extern	int	sendfd(int, int);
766 extern	int	recvfd(int);
767 extern	int	post9pservice(int, char*);
768 
769 /* external names that we don't want to step on */
770 #ifndef NOPLAN9DEFINES
771 #define main	p9main
772 #endif
773 
774 /* compiler directives on plan 9 */
775 #define	USED(x)	if(x){}else{}
776 #define	SET(x)	((x)=0)
777 
778 /* command line */
779 extern char	*argv0;
780 extern void __fixargv0(void);
781 #define	ARGBEGIN	for((argv0?0:(argv0=(__fixargv0(),*argv))),argv++,argc--;\
782 			    argv[0] && argv[0][0]=='-' && argv[0][1];\
783 			    argc--, argv++) {\
784 				char *_args, *_argt;\
785 				Rune _argc;\
786 				_args = &argv[0][1];\
787 				if(_args[0]=='-' && _args[1]==0){\
788 					argc--; argv++; break;\
789 				}\
790 				_argc = 0;\
791 				while(*_args && (_args += chartorune(&_argc, _args)))\
792 				switch(_argc)
793 #define	ARGEND		SET(_argt);USED(_argt);USED(_argc);USED(_args);}USED(argv);USED(argc);
794 #define	ARGF()		(_argt=_args, _args="",\
795 				(*_argt? _argt: argv[1]? (argc--, *++argv): 0))
796 #define	EARGF(x)	(_argt=_args, _args="",\
797 				(*_argt? _argt: argv[1]? (argc--, *++argv): ((x), abort(), (char*)0)))
798 
799 #define	ARGC()		_argc
800 
801 #if defined(__cplusplus)
802 }
803 #endif
804 #endif	/* _LIB9_H_ */