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  */
347 extern	int	p9atoi(char*);
348 extern	long	p9atol(char*);
349 extern	vlong	p9atoll(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 atoi		p9atoi
404 #define atol		p9atol
405 #define atoll		p9atoll
406 #define encrypt		p9encrypt
407 #define decrypt		p9decrypt
408 #define getenv		p9getenv
409 #define	getwd		p9getwd
410 #define	longjmp		p9longjmp
411 #undef  setjmp
412 #define setjmp		p9setjmp
413 #define putenv		p9putenv
414 #define notejmp		p9notejmp
415 #define jmp_buf		p9jmp_buf
416 #define syslog		p9syslog
417 #define time		p9time
418 #endif
419 
420 /*
421  *  synchronization
422  */
423 typedef
424 struct Lock {
425 	int	val;
426 } Lock;
427 
428 extern int	_tas(int*);
429 
430 extern	void	lock(Lock*);
431 extern	void	unlock(Lock*);
432 extern	int	canlock(Lock*);
433 
434 typedef struct QLp QLp;
435 struct QLp
436 {
437 	int	inuse;
438 	QLp	*next;
439 	char	state;
440 };
441 
442 typedef
443 struct QLock
444 {
445 	Lock	lock;
446 	int	locked;
447 	QLp	*head;
448 	QLp 	*tail;
449 } QLock;
450 
451 extern	void	qlock(QLock*);
452 extern	void	qunlock(QLock*);
453 extern	int	canqlock(QLock*);
454 extern	void	_qlockinit(ulong (*)(ulong, ulong));	/* called only by the thread library */
455 
456 typedef
457 struct RWLock
458 {
459 	Lock	lock;
460 	int	readers;	/* number of readers */
461 	int	writer;		/* number of writers */
462 	QLp	*head;		/* list of waiting processes */
463 	QLp	*tail;
464 } RWLock;
465 
466 extern	void	rlock(RWLock*);
467 extern	void	runlock(RWLock*);
468 extern	int		canrlock(RWLock*);
469 extern	void	wlock(RWLock*);
470 extern	void	wunlock(RWLock*);
471 extern	int		canwlock(RWLock*);
472 
473 typedef
474 struct Rendez
475 {
476 	QLock *l;
477 	QLp	*head;
478 	QLp	*tail;
479 } Rendez;
480 
481 extern	void	rsleep(Rendez*);	/* unlocks r->l, sleeps, locks r->l again */
482 extern	int	rwakeup(Rendez*);
483 extern	int	rwakeupall(Rendez*);
484 extern	void**	privalloc(void);
485 extern	void	privfree(void**);
486 
487 /*
488  *  network dialing
489  */
490 #define NETPATHLEN 40
491 extern	int	p9accept(int, char*);
492 extern	int	p9announce(char*, char*);
493 extern	int	p9dial(char*, char*, char*, int*);
494 extern	void	p9setnetmtpt(char*, int, char*);
495 extern	int	p9hangup(int);
496 extern	int	p9listen(char*, char*);
497 extern	char*	p9netmkaddr(char*, char*, char*);
498 extern	int	p9reject(int, char*, char*);
499 
500 #ifndef NOPLAN9DEFINES
501 #define	accept		p9accept
502 #define	announce	p9announce
503 #define	dial		p9dial
504 #define	setnetmtpt	p9setnetmtpt
505 #define	hangup		p9hangup
506 #define	listen		p9listen
507 #define	netmkaddr	p9netmkaddr
508 #define	reject		p9reject
509 #endif
510 
511 /*
512  *  encryption
513  */
514 extern	int	pushssl(int, char*, char*, char*, int*);
515 extern	int	pushtls(int, char*, char*, int, char*, char*);
516 
517 /*
518  *  network services
519  */
520 typedef struct NetConnInfo NetConnInfo;
521 struct NetConnInfo
522 {
523 	char	*dir;		/* connection directory */
524 	char	*root;		/* network root */
525 	char	*spec;		/* binding spec */
526 	char	*lsys;		/* local system */
527 	char	*lserv;		/* local service */
528 	char	*rsys;		/* remote system */
529 	char	*rserv;		/* remote service */
530 };
531 extern	NetConnInfo*	getnetconninfo(char*, int);
532 extern	void		freenetconninfo(NetConnInfo*);
533 
534 /*
535  * system calls
536  *
537  */
538 #define	STATMAX	65535U	/* max length of machine-independent stat structure */
539 #define	DIRMAX	(sizeof(Dir)+STATMAX)	/* max length of Dir structure */
540 #define	ERRMAX	128	/* max length of error string */
541 
542 #define	MORDER	0x0003	/* mask for bits defining order of mounting */
543 #define	MREPL	0x0000	/* mount replaces object */
544 #define	MBEFORE	0x0001	/* mount goes before others in union directory */
545 #define	MAFTER	0x0002	/* mount goes after others in union directory */
546 #define	MCREATE	0x0004	/* permit creation in mounted directory */
547 #define	MCACHE	0x0010	/* cache some data */
548 #define	MMASK	0x0017	/* all bits on */
549 
550 #define	OREAD	0	/* open for read */
551 #define	OWRITE	1	/* write */
552 #define	ORDWR	2	/* read and write */
553 #define	OEXEC	3	/* execute, == read but check execute permission */
554 #define	OTRUNC	16	/* or'ed in (except for exec), truncate file first */
555 #define	OCEXEC	32	/* or'ed in, close on exec */
556 #define	ORCLOSE	64	/* or'ed in, remove on close */
557 #define	OEXCL	0x1000	/* or'ed in, exclusive use (create only) */
558 
559 #define	AEXIST	0	/* accessible: exists */
560 #define	AEXEC	1	/* execute access */
561 #define	AWRITE	2	/* write access */
562 #define	AREAD	4	/* read access */
563 
564 /* Segattch */
565 #define	SG_RONLY	0040	/* read only */
566 #define	SG_CEXEC	0100	/* detach on exec */
567 
568 #define	NCONT	0	/* continue after note */
569 #define	NDFLT	1	/* terminate after note */
570 #define	NSAVE	2	/* clear note but hold state */
571 #define	NRSTR	3	/* restore saved state */
572 
573 /* bits in Qid.type */
574 #define QTDIR		0x80		/* type bit for directories */
575 #define QTAPPEND	0x40		/* type bit for append only files */
576 #define QTEXCL		0x20		/* type bit for exclusive use files */
577 #define QTMOUNT		0x10		/* type bit for mounted channel */
578 #define QTAUTH		0x08		/* type bit for authentication file */
579 #define QTFILE		0x00		/* plain file */
580 
581 /* bits in Dir.mode */
582 #define DMDIR		0x80000000	/* mode bit for directories */
583 #define DMAPPEND	0x40000000	/* mode bit for append only files */
584 #define DMEXCL		0x20000000	/* mode bit for exclusive use files */
585 #define DMMOUNT		0x10000000	/* mode bit for mounted channel */
586 #define DMAUTH		0x08000000	/* mode bit for authentication file */
587 #define DMREAD		0x4		/* mode bit for read permission */
588 #define DMWRITE		0x2		/* mode bit for write permission */
589 #define DMEXEC		0x1		/* mode bit for execute permission */
590 
591 #if defined(__FreeBSD__)
592 #undef RFFDG
593 #undef RFNOTEG
594 #undef RFPROC
595 #undef RFMEM
596 #undef RFNOWAIT
597 #undef RFCFDG
598 #undef RFNAMEG
599 #undef RFENVG
600 #undef RFCENVG
601 #undef RFCFDG
602 #undef RFCNAMEG
603 #endif
604 
605 enum
606 {
607 	RFNAMEG		= (1<<0), 
608 	RFENVG		= (1<<1), 
609 	RFFDG		= (1<<2),
610 	RFNOTEG		= (1<<3),
611 	RFPROC		= (1<<4),
612 	RFMEM		= (1<<5),
613 	RFNOWAIT	= (1<<6),
614 	RFCNAMEG	= (1<<10), 
615 	RFCENVG		= (1<<11), 
616 	RFCFDG		= (1<<12),
617 /*	RFREND		= (1<<13), */
618 /*	RFNOMNT		= (1<<14) */
619 };
620 
621 extern int		ffork(int, void(*)(void*), void*);
622 
623 typedef
624 struct Qid
625 {
626 	uvlong	path;
627 	ulong	vers;
628 	uchar	type;
629 } Qid;
630 
631 typedef
632 struct Dir {
633 	/* system-modified data */
634 	ushort	type;	/* server type */
635 	uint	dev;	/* server subtype */
636 	/* file data */
637 	Qid	qid;	/* unique id from server */
638 	ulong	mode;	/* permissions */
639 	ulong	atime;	/* last read time */
640 	ulong	mtime;	/* last write time */
641 	vlong	length;	/* file length */
642 	char	*name;	/* last element of path */
643 	char	*uid;	/* owner name */
644 	char	*gid;	/* group name */
645 	char	*muid;	/* last modifier name */
646 } Dir;
647 
648 /* keep /sys/src/ape/lib/ap/plan9/sys9.h in sync with this -rsc */
649 typedef
650 struct Waitmsg
651 {
652 	int pid;	/* of loved one */
653 	ulong time[3];	/* of loved one & descendants */
654 	char	*msg;
655 } Waitmsg;
656 
657 typedef
658 struct IOchunk
659 {
660 	void	*addr;
661 	ulong	len;
662 } IOchunk;
663 
664 extern	void	_exits(char*);
665 
666 extern	void	abort(void);
667 /* extern	int	access(char*, int); */
668 extern	long	p9alarm(ulong);
669 extern	int	await(char*, int);
670 extern	int	awaitnohang(char*, int);
671 /* extern	int	bind(char*, char*, int); give up */
672 /* extern	int	brk(void*); <unistd.h> */
673 extern	int	p9chdir(char*);
674 extern	int	close(int);
675 extern	int	p9create(char*, int, ulong);
676 extern	int	p9dup(int, int);
677 extern	int	errstr(char*, uint);
678 extern	int	p9exec(char*, char*[]);
679 /* extern	int	execl(char*, ...); <unistd.h> */
680 /* extern	int	fork(void); <unistd.h> */
681 extern	int	p9rfork(int);
682 /* not implemented 
683 extern	int	fauth(int, char*);
684 extern	int	fstat(int, uchar*, int);
685 extern	int	fwstat(int, uchar*, int);
686 extern	int	fversion(int, int, char*, int);
687 extern	int	mount(int, int, char*, int, char*);
688 extern	int	unmount(char*, char*);
689 */
690 extern	int	noted(int);
691 extern	int	notify(void(*)(void*, char*));
692 extern	int	p9open(char*, int);
693 extern	int	fd2path(int, char*, int);
694 extern	int	p9pipe(int*);
695 /* 
696  * use defs from <unistd.h>
697 extern	long	pread(int, void*, long, vlong);
698 extern	long	preadv(int, IOchunk*, int, vlong);
699 extern	long	pwrite(int, void*, long, vlong);
700 extern	long	pwritev(int, IOchunk*, int, vlong);
701 extern	long	read(int, void*, long);
702  */
703 extern	long	readn(int, void*, long);
704 /* extern	long	readv(int, IOchunk*, int); <unistd.h> */
705 extern	int	remove(const char*);
706 /* extern	void*	sbrk(ulong); <unistd.h> */
707 /* extern	long	oseek(int, long, int); */
708 extern	vlong	p9seek(int, vlong, int);
709 /* give up
710 extern	long	segattach(int, char*, void*, ulong);
711 extern	int	segbrk(void*, void*);
712 extern	int	segdetach(void*);
713 extern	int	segflush(void*, ulong);
714 extern	int	segfree(void*, ulong);
715 */
716 extern	int	p9sleep(long);
717 /* extern	int	stat(char*, uchar*, int); give up */
718 extern	Waitmsg*	p9wait(void);
719 extern	Waitmsg*	waitnohang(void);
720 extern	int	p9waitpid(void);
721 /* <unistd.h>
722 extern	long	write(int, void*, long);
723 extern	long	writev(int, IOchunk*, int);
724 */
725 /* extern	int	wstat(char*, uchar*, int); give up */
726 extern	ulong	rendezvous(ulong, ulong);
727 
728 #ifndef NOPLAN9DEFINES
729 #define alarm		p9alarm
730 #define	dup		p9dup
731 #define	exec		p9exec
732 #define	seek		p9seek
733 #define sleep		p9sleep
734 #define wait		p9wait
735 #define waitpid		p9waitpid
736 #define rfork		p9rfork
737 /* #define access		p9access */
738 #define create		p9create
739 #define open		p9open
740 #define pipe		p9pipe
741 #endif
742 
743 extern	Dir*	dirstat(char*);
744 extern	Dir*	dirfstat(int);
745 extern	int	dirwstat(char*, Dir*);
746 extern	int	dirfwstat(int, Dir*);
747 extern	long	dirread(int, Dir**);
748 extern	void	nulldir(Dir*);
749 extern	long	dirreadall(int, Dir**);
750 /* extern	int	getpid(void); <unistd.h> */
751 /* extern	int	getppid(void); */
752 extern	void	rerrstr(char*, uint);
753 extern	char*	sysname(void);
754 extern	void	werrstr(char*, ...);
755 extern	char*	getns(void);
756 extern	char*	get9root(void);
757 extern	char*	unsharp(char*);
758 extern	int	sendfd(int, int);
759 extern	int	recvfd(int);
760 extern	int	post9pservice(int, char*);
761 
762 /* external names that we don't want to step on */
763 #ifndef NOPLAN9DEFINES
764 #define main	p9main
765 #endif
766 
767 /* compiler directives on plan 9 */
768 #define	USED(x)	if(x){}else{}
769 #define	SET(x)	((x)=0)
770 
771 /* command line */
772 extern char	*argv0;
773 extern void __fixargv0(void);
774 #define	ARGBEGIN	for((argv0?0:(argv0=(__fixargv0(),*argv))),argv++,argc--;\
775 			    argv[0] && argv[0][0]=='-' && argv[0][1];\
776 			    argc--, argv++) {\
777 				char *_args, *_argt;\
778 				Rune _argc;\
779 				_args = &argv[0][1];\
780 				if(_args[0]=='-' && _args[1]==0){\
781 					argc--; argv++; break;\
782 				}\
783 				_argc = 0;\
784 				while(*_args && (_args += chartorune(&_argc, _args)))\
785 				switch(_argc)
786 #define	ARGEND		SET(_argt);USED(_argt);USED(_argc);USED(_args);}USED(argv);USED(argc);
787 #define	ARGF()		(_argt=_args, _args="",\
788 				(*_argt? _argt: argv[1]? (argc--, *++argv): 0))
789 #define	EARGF(x)	(_argt=_args, _args="",\
790 				(*_argt? _argt: argv[1]? (argc--, *++argv): ((x), abort(), (char*)0)))
791 
792 #define	ARGC()		_argc
793 
794 #if defined(__cplusplus)
795 }
796 #endif
797 #endif	/* _LIB9_H_ */