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 _LIB9H_
7 #define _LIB9H_ 1
8 
9 #if defined(__cplusplus)
10 extern "C" {
11 #endif                                                                          
12 
13 #include <unistd.h>
14 #include <string.h>
15 #include <stdlib.h>
16 #include <stdarg.h>
17 #include <fcntl.h>
18 #include <assert.h>
19 #include <setjmp.h>
20 #include <stddef.h>
21 #include <utf.h>
22 #include <fmt.h>
23 #include <math.h>
24 
25 /*
26  * OS-specific crap
27  */
28 #define _NEEDUCHAR 1
29 #define _NEEDUSHORT 1
30 #define _NEEDUINT 1
31 #define _NEEDULONG 1
32 
33 typedef long p9jmp_buf[sizeof(sigjmp_buf)/sizeof(long)];
34 
35 #if defined(__linux__)
36 #	include <sys/types.h>
37 #	if defined(__USE_MISC)
38 #		undef _NEEDUSHORT
39 #		undef _NEEDUINT
40 #		undef _NEEDULONG
41 #	endif
42 #endif
43 #if defined(__sun__)
44 #	include <sys/types.h>
45 #	undef _NEEDUSHORT
46 #	undef _NEEDUINT
47 #	undef _NEEDULONG
48 #endif
49 #if defined(__FreeBSD__)
50 #	include <sys/types.h>
51 #	if !defined(_POSIX_SOURCE)
52 #		undef _NEEDUSHORT
53 #		undef _NEEDUINT
54 #	endif
55 #endif
56 #if defined(__APPLE__)
57 #	include <sys/types.h>
58 #	undef _NEEDUSHORT
59 #	undef _NEEDUINT
60 #endif
61 
62 typedef signed char schar;
63 typedef unsigned int u32int;
64 #ifdef _NEEDUCHAR
65 	typedef unsigned char uchar;
66 #endif
67 #ifdef _NEEDUSHORT
68 	typedef unsigned short ushort;
69 #endif
70 #ifdef _NEEDUINT
71 	typedef unsigned int uint;
72 #endif
73 #ifdef _NEEDULONG
74 	typedef unsigned long ulong;
75 #endif
76 typedef unsigned long long uvlong;
77 typedef long long vlong;
78 typedef uvlong u64int;
79 typedef uchar u8int;
80 typedef ushort u16int;
81 
82 /*
83  * Begin usual libc.h 
84  */
85 
86 #define	nil	((void*)0)
87 #define	nelem(x)	(sizeof(x)/sizeof((x)[0]))
88 
89 #ifndef offsetof
90 #define offsetof(s, m)	(ulong)(&(((s*)0)->m))
91 #endif
92 
93 /*
94  * mem routines (provided by system <string.h>)
95  *
96 extern	void*	memccpy(void*, void*, int, ulong);
97 extern	void*	memset(void*, int, ulong);
98 extern	int	memcmp(void*, void*, ulong);
99 extern	void*	memcpy(void*, void*, ulong);
100 extern	void*	memmove(void*, void*, ulong);
101 extern	void*	memchr(void*, int, ulong);
102  */
103 
104 /*
105  * string routines (provided by system <string.h>)
106  *
107 extern	char*	strcat(char*, char*);
108 extern	char*	strchr(char*, int);
109 extern	int	strcmp(char*, char*);
110 extern	char*	strcpy(char*, char*);
111  */
112 extern	char*	strecpy(char*, char*, char*);
113  /*
114 extern	char*	strdup(char*);
115 extern	char*	strncat(char*, char*, long);
116 extern	char*	strncpy(char*, char*, long);
117 extern	int	strncmp(char*, char*, long);
118 extern	char*	strpbrk(char*, char*);
119 extern	char*	strrchr(char*, int);
120 extern	char*	strtok(char*, char*);
121 extern	long	strlen(char*);
122 extern	long	strspn(char*, char*);
123 extern	long	strcspn(char*, char*);
124 extern	char*	strstr(char*, char*);
125  */
126 extern	int	cistrncmp(char*, char*, int);
127 extern	int	cistrcmp(char*, char*);
128 extern	char*	cistrstr(char*, char*);
129 extern	int	tokenize(char*, char**, int);
130 
131 /*
132 enum
133 {
134 	UTFmax		= 3,
135 	Runesync	= 0x80,
136 	Runeself	= 0x80,
137 	Runeerror	= 0x80,
138 };
139 */
140 
141 /*
142  * rune routines (provided by <utf.h>
143  *
144 extern	int	runetochar(char*, Rune*);
145 extern	int	chartorune(Rune*, char*);
146 extern	int	runelen(long);
147 extern	int	runenlen(Rune*, int);
148 extern	int	fullrune(char*, int);
149 extern	int	utflen(char*);
150 extern	int	utfnlen(char*, long);
151 extern	char*	utfrune(char*, long);
152 extern	char*	utfrrune(char*, long);
153 extern	char*	utfutf(char*, char*);
154 extern	char*	utfecpy(char*, char*, char*);
155 
156 extern	Rune*	runestrcat(Rune*, Rune*);
157 extern	Rune*	runestrchr(Rune*, Rune);
158 extern	int	runestrcmp(Rune*, Rune*);
159 extern	Rune*	runestrcpy(Rune*, Rune*);
160 extern	Rune*	runestrncpy(Rune*, Rune*, long);
161 extern	Rune*	runestrecpy(Rune*, Rune*, Rune*);
162 extern	Rune*	runestrdup(Rune*);
163 extern	Rune*	runestrncat(Rune*, Rune*, long);
164 extern	int	runestrncmp(Rune*, Rune*, long);
165 extern	Rune*	runestrrchr(Rune*, Rune);
166 extern	long	runestrlen(Rune*);
167 extern	Rune*	runestrstr(Rune*, Rune*);
168 
169 extern	Rune	tolowerrune(Rune);
170 extern	Rune	totitlerune(Rune);
171 extern	Rune	toupperrune(Rune);
172 extern	int	isalpharune(Rune);
173 extern	int	islowerrune(Rune);
174 extern	int	isspacerune(Rune);
175 extern	int	istitlerune(Rune);
176 extern	int	isupperrune(Rune);
177  */
178 
179 /*
180  * malloc (provied by system <stdlib.h>)
181  *
182 extern	void*	malloc(ulong);
183  */
184 extern	void*	mallocz(ulong, int);
185 /*
186 extern	void	free(void*);
187 extern	ulong	msize(void*);
188 extern	void*	calloc(ulong, ulong);
189 extern	void*	realloc(void*, ulong);
190  */
191 extern	void		setmalloctag(void*, ulong);
192 extern	void		setrealloctag(void*, ulong);
193 extern	ulong	getmalloctag(void*);
194 extern	ulong	getrealloctag(void*);
195 /*
196 extern	void*	malloctopoolblock(void*);
197 */
198 
199 /*
200  * print routines (provided by <fmt.h>)
201  *
202 typedef struct Fmt	Fmt;
203 struct Fmt{
204 	uchar	runes;
205 	void	*start;
206 	void	*to;
207 	void	*stop;
208 	int	(*flush)(Fmt *);
209 	void	*farg;
210 	int	nfmt;
211 	va_list	args;
212 	int	r;
213 	int	width;
214 	int	prec;
215 	ulong	flags;
216 };
217 
218 enum{
219 	FmtWidth	= 1,
220 	FmtLeft		= FmtWidth << 1,
221 	FmtPrec		= FmtLeft << 1,
222 	FmtSharp	= FmtPrec << 1,
223 	FmtSpace	= FmtSharp << 1,
224 	FmtSign		= FmtSpace << 1,
225 	FmtZero		= FmtSign << 1,
226 	FmtUnsigned	= FmtZero << 1,
227 	FmtShort	= FmtUnsigned << 1,
228 	FmtLong		= FmtShort << 1,
229 	FmtVLong	= FmtLong << 1,
230 	FmtComma	= FmtVLong << 1,
231 	FmtByte	= FmtComma << 1,
232 
233 	FmtFlag		= FmtByte << 1
234 };
235 
236 extern	int	print(char*, ...);
237 extern	char*	seprint(char*, char*, char*, ...);
238 extern	char*	vseprint(char*, char*, char*, va_list);
239 extern	int	snprint(char*, int, char*, ...);
240 extern	int	vsnprint(char*, int, char*, va_list);
241 extern	char*	smprint(char*, ...);
242 extern	char*	vsmprint(char*, va_list);
243 extern	int	sprint(char*, char*, ...);
244 extern	int	fprint(int, char*, ...);
245 extern	int	vfprint(int, char*, va_list);
246 
247 extern	int	runesprint(Rune*, char*, ...);
248 extern	int	runesnprint(Rune*, int, char*, ...);
249 extern	int	runevsnprint(Rune*, int, char*, va_list);
250 extern	Rune*	runeseprint(Rune*, Rune*, char*, ...);
251 extern	Rune*	runevseprint(Rune*, Rune*, char*, va_list);
252 extern	Rune*	runesmprint(char*, ...);
253 extern	Rune*	runevsmprint(char*, va_list);
254 
255 extern	int	fmtfdinit(Fmt*, int, char*, int);
256 extern	int	fmtfdflush(Fmt*);
257 extern	int	fmtstrinit(Fmt*);
258 extern	char*	fmtstrflush(Fmt*);
259 extern	int	runefmtstrinit(Fmt*);
260 extern	Rune*	runefmtstrflush(Fmt*);
261 
262 extern	int	fmtinstall(int, int (*)(Fmt*));
263 extern	int	dofmt(Fmt*, char*);
264 extern	int	dorfmt(Fmt*, Rune*);
265 extern	int	fmtprint(Fmt*, char*, ...);
266 extern	int	fmtvprint(Fmt*, char*, va_list);
267 extern	int	fmtrune(Fmt*, int);
268 extern	int	fmtstrcpy(Fmt*, char*);
269 extern	int	fmtrunestrcpy(Fmt*, Rune*);
270  */
271 
272 /*
273  * error string for %r
274  * supplied on per os basis, not part of fmt library
275  *
276  * (provided by lib9, but declared in fmt.h)
277  *
278 extern	int	errfmt(Fmt *f);
279  */
280 
281 /*
282  * quoted strings
283  */
284 extern	char	*unquotestrdup(char*);
285 extern	Rune	*unquoterunestrdup(Rune*);
286 extern	char	*quotestrdup(char*);
287 extern	Rune	*quoterunestrdup(Rune*);
288 /*
289  * in fmt.h
290  *
291 extern	void	quotefmtinstall(void);
292 extern	int	quotestrfmt(Fmt*);
293 extern	int	quoterunestrfmt(Fmt*);
294  */
295 #ifndef NOPLAN9DEFINES
296 #define doquote fmtdoquote
297 #endif
298 extern	int	needsrcquote(int);
299 
300 /*
301  * random number (in <stdlib.h>)
302  *
303 extern	void	srand(long);
304 extern	int	rand(void);
305  */
306 extern	int	nrand(int);
307 extern	long	lrand(void);
308 extern	long	lnrand(long);
309 extern	double	frand(void);
310 extern	ulong	truerand(void);			/* uses /dev/random */
311 extern	ulong	ntruerand(ulong);		/* uses /dev/random */
312 
313 /*
314  * math
315  */
316 extern	ulong	getfcr(void);
317 extern	void	setfsr(ulong);
318 extern	ulong	getfsr(void);
319 extern	void	setfcr(ulong);
320 extern	double	NaN(void);
321 extern	double	Inf(int);
322 extern	int	isNaN(double);
323 extern	int	isInf(double, int);
324 extern	ulong	umuldiv(ulong, ulong, ulong);
325 extern	long	muldiv(long, long, long);
326 
327 /*
328  * provided by math.h
329  *
330 extern	double	pow(double, double);
331 extern	double	atan2(double, double);
332 extern	double	fabs(double);
333 extern	double	atan(double);
334 extern	double	log(double);
335 extern	double	log10(double);
336 extern	double	exp(double);
337 extern	double	floor(double);
338 extern	double	ceil(double);
339 extern	double	hypot(double, double);
340 extern	double	sin(double);
341 extern	double	cos(double);
342 extern	double	tan(double);
343 extern	double	asin(double);
344 extern	double	acos(double);
345 extern	double	sinh(double);
346 extern	double	cosh(double);
347 extern	double	tanh(double);
348 extern	double	sqrt(double);
349 extern	double	fmod(double, double);
350 #define	HUGE	3.4028234e38
351 #define	PIO2	1.570796326794896619231e0
352 #define	PI	(PIO2+PIO2)
353  */
354 #define PI	M_PI
355 #define	PIO2	M_PI_2
356 
357 /*
358  * Time-of-day
359  */
360 
361 typedef
362 struct Tm
363 {
364 	int	sec;
365 	int	min;
366 	int	hour;
367 	int	mday;
368 	int	mon;
369 	int	year;
370 	int	wday;
371 	int	yday;
372 	char	zone[4];
373 	int	tzoff;
374 } Tm;
375 
376 extern	Tm*	p9gmtime(long);
377 extern	Tm*	p9localtime(long);
378 extern	char*	p9asctime(Tm*);
379 extern	char*	p9ctime(long);
380 extern	double	p9cputime(void);
381 extern	long	p9times(long*);
382 extern	long	p9tm2sec(Tm*);
383 extern	vlong	p9nsec(void);
384 
385 #ifndef NOPLAN9DEFINES
386 #define	gmtime		p9gmtime
387 #define	localtime	p9localtime
388 #define	asctime		p9asctime
389 #define	ctime		p9ctime
390 #define	cputime		p9cputime
391 #define	times		p9times
392 #define	tm2sec		p9tm2sec
393 #define	nsec		p9nsec
394 #endif
395 
396 /*
397  * one-of-a-kind
398  */
399 enum
400 {
401 	PNPROC		= 1,
402 	PNGROUP		= 2,
403 };
404 
405 /* extern	int	abs(int); <stdlib.h> */
406 extern	int	atexit(void(*)(void));
407 extern	void	atexitdont(void(*)(void));
408 extern	int	atnotify(int(*)(void*, char*), int);
409 /* 
410  * <stdlib.h>
411 extern	double	atof(char*); <stdlib.h>
412 extern	int	atoi(char*);
413 extern	long	atol(char*);
414  */
415 extern	vlong	atoll(char*);
416 extern	double	charstod(int(*)(void*), void*);
417 extern	char*	cleanname(char*);
418 extern	int	p9decrypt(void*, void*, int);
419 extern	int	p9encrypt(void*, void*, int);
420 extern	int	dec64(uchar*, int, char*, int);
421 extern	int	enc64(char*, int, uchar*, int);
422 extern	int	dec32(uchar*, int, char*, int);
423 extern	int	enc32(char*, int, uchar*, int);
424 extern	int	dec16(uchar*, int, char*, int);
425 extern	int	enc16(char*, int, uchar*, int);
426 extern	int	encodefmt(Fmt*);
427 extern	int	dirmodefmt(Fmt*);
428 extern	void	exits(char*);
429 extern	double	frexp(double, int*);
430 extern	ulong	getcallerpc(void*);
431 extern	char*	p9getenv(char*);
432 extern	int	getfields(char*, char**, int, int, char*);
433 extern	int	gettokens(char *, char **, int, char *);
434 extern	char*	getuser(void);
435 extern	char*	p9getwd(char*, int);
436 extern	int	iounit(int);
437 /* extern	long	labs(long); <math.h> */
438 /* extern	double	ldexp(double, int); <math.h> */
439 extern	void	p9longjmp(p9jmp_buf, int);
440 extern	char*	mktemp(char*);
441 /* extern	double	modf(double, double*); <math.h> */
442 extern	int	netcrypt(void*, void*);
443 extern	void	p9notejmp(void*, p9jmp_buf, int);
444 extern	void	perror(const char*);
445 extern	int	postnote(int, int, char *);
446 extern	double	pow10(int);
447 /* extern	int	putenv(char*, char*); <stdlib.h. */
448 /* extern	void	qsort(void*, long, long, int (*)(void*, void*)); <stdlib.h> */
449 extern	int	p9setjmp(p9jmp_buf);
450 /*
451  * <stdlib.h>
452 extern	double	strtod(char*, char**);
453 extern	long	strtol(char*, char**, int);
454 extern	ulong	strtoul(char*, char**, int);
455 extern	vlong	strtoll(char*, char**, int);
456 extern	uvlong	strtoull(char*, char**, int);
457  */
458 extern	void	sysfatal(char*, ...);
459 extern	void	syslog(int, char*, char*, ...);
460 extern	long	time(long*);
461 /* extern	int	tolower(int); <ctype.h> */
462 /* extern	int	toupper(int); <ctype.h> */
463 #ifndef NOPLAN9DEFINES
464 #define getenv		p9getenv
465 #define	getwd		p9getwd
466 #define	longjmp		p9longjmp
467 #define setjmp		p9setjmp
468 #define notejmp		p9notejmp
469 #define jmp_buf		p9jmp_buf
470 #endif
471 
472 /*
473  *  synchronization
474  */
475 typedef
476 struct Lock {
477 	int	val;
478 } Lock;
479 
480 extern int	_tas(int*);
481 
482 extern	void	lock(Lock*);
483 extern	void	unlock(Lock*);
484 extern	int	canlock(Lock*);
485 
486 typedef struct QLp QLp;
487 struct QLp
488 {
489 	int	inuse;
490 	QLp	*next;
491 	char	state;
492 };
493 
494 typedef
495 struct QLock
496 {
497 	Lock	lock;
498 	int	locked;
499 	QLp	*head;
500 	QLp 	*tail;
501 } QLock;
502 
503 extern	void	qlock(QLock*);
504 extern	void	qunlock(QLock*);
505 extern	int	canqlock(QLock*);
506 extern	void	_qlockinit(ulong (*)(ulong, ulong));	/* called only by the thread library */
507 
508 typedef
509 struct RWLock
510 {
511 	Lock	lock;
512 	int	readers;	/* number of readers */
513 	int	writer;		/* number of writers */
514 	QLp	*head;		/* list of waiting processes */
515 	QLp	*tail;
516 } RWLock;
517 
518 extern	void	rlock(RWLock*);
519 extern	void	runlock(RWLock*);
520 extern	int		canrlock(RWLock*);
521 extern	void	wlock(RWLock*);
522 extern	void	wunlock(RWLock*);
523 extern	int		canwlock(RWLock*);
524 
525 typedef
526 struct Rendez
527 {
528 	QLock *l;
529 	QLp	*head;
530 	QLp	*tail;
531 } Rendez;
532 
533 extern	void	rsleep(Rendez*);	/* unlocks r->l, sleeps, locks r->l again */
534 extern	int	rwakeup(Rendez*);
535 extern	int	rwakeupall(Rendez*);
536 extern	void**	privalloc(void);
537 extern	void	privfree(void**);
538 
539 /*
540  *  network dialing
541  */
542 #define NETPATHLEN 40
543 extern	int	p9accept(int, char*);
544 extern	int	p9announce(char*, char*);
545 extern	int	p9dial(char*, char*, char*, int*);
546 extern	void	p9setnetmtpt(char*, int, char*);
547 extern	int	p9hangup(int);
548 extern	int	p9listen(char*, char*);
549 extern	char*	p9netmkaddr(char*, char*, char*);
550 extern	int	p9reject(int, char*, char*);
551 
552 #ifndef NOPLAN9DEFINES
553 #define	accept		p9accept
554 #define	announce	p9announce
555 #define	dial		p9dial
556 #define	setnetmtpt	p9setnetmtpt
557 #define	hangup		p9hangup
558 #define	listen		p9listen
559 #define	netmkaddr	p9netmkaddr
560 #define	reject		p9reject
561 #endif
562 
563 /*
564  *  encryption
565  */
566 extern	int	pushssl(int, char*, char*, char*, int*);
567 extern	int	pushtls(int, char*, char*, int, char*, char*);
568 
569 /*
570  *  network services
571  */
572 typedef struct NetConnInfo NetConnInfo;
573 struct NetConnInfo
574 {
575 	char	*dir;		/* connection directory */
576 	char	*root;		/* network root */
577 	char	*spec;		/* binding spec */
578 	char	*lsys;		/* local system */
579 	char	*lserv;		/* local service */
580 	char	*rsys;		/* remote system */
581 	char	*rserv;		/* remote service */
582 };
583 extern	NetConnInfo*	getnetconninfo(char*, int);
584 extern	void		freenetconninfo(NetConnInfo*);
585 
586 /*
587  * system calls
588  *
589  */
590 #define	STATMAX	65535U	/* max length of machine-independent stat structure */
591 #define	DIRMAX	(sizeof(Dir)+STATMAX)	/* max length of Dir structure */
592 #define	ERRMAX	128	/* max length of error string */
593 
594 #define	MORDER	0x0003	/* mask for bits defining order of mounting */
595 #define	MREPL	0x0000	/* mount replaces object */
596 #define	MBEFORE	0x0001	/* mount goes before others in union directory */
597 #define	MAFTER	0x0002	/* mount goes after others in union directory */
598 #define	MCREATE	0x0004	/* permit creation in mounted directory */
599 #define	MCACHE	0x0010	/* cache some data */
600 #define	MMASK	0x0017	/* all bits on */
601 
602 #define	OREAD	0	/* open for read */
603 #define	OWRITE	1	/* write */
604 #define	ORDWR	2	/* read and write */
605 #define	OEXEC	3	/* execute, == read but check execute permission */
606 #define	OTRUNC	16	/* or'ed in (except for exec), truncate file first */
607 #define	OCEXEC	32	/* or'ed in, close on exec */
608 #define	ORCLOSE	64	/* or'ed in, remove on close */
609 #define	OEXCL	0x1000	/* or'ed in, exclusive use (create only) */
610 
611 #define	AEXIST	0	/* accessible: exists */
612 #define	AEXEC	1	/* execute access */
613 #define	AWRITE	2	/* write access */
614 #define	AREAD	4	/* read access */
615 
616 /* Segattch */
617 #define	SG_RONLY	0040	/* read only */
618 #define	SG_CEXEC	0100	/* detach on exec */
619 
620 #define	NCONT	0	/* continue after note */
621 #define	NDFLT	1	/* terminate after note */
622 #define	NSAVE	2	/* clear note but hold state */
623 #define	NRSTR	3	/* restore saved state */
624 
625 /* bits in Qid.type */
626 #define QTDIR		0x80		/* type bit for directories */
627 #define QTAPPEND	0x40		/* type bit for append only files */
628 #define QTEXCL		0x20		/* type bit for exclusive use files */
629 #define QTMOUNT		0x10		/* type bit for mounted channel */
630 #define QTAUTH		0x08		/* type bit for authentication file */
631 #define QTFILE		0x00		/* plain file */
632 
633 /* bits in Dir.mode */
634 #define DMDIR		0x80000000	/* mode bit for directories */
635 #define DMAPPEND	0x40000000	/* mode bit for append only files */
636 #define DMEXCL		0x20000000	/* mode bit for exclusive use files */
637 #define DMMOUNT		0x10000000	/* mode bit for mounted channel */
638 #define DMAUTH		0x08000000	/* mode bit for authentication file */
639 #define DMREAD		0x4		/* mode bit for read permission */
640 #define DMWRITE		0x2		/* mode bit for write permission */
641 #define DMEXEC		0x1		/* mode bit for execute permission */
642 
643 #if defined(__FreeBSD__)
644 #undef RFFDG
645 #undef RFNOTEG
646 #undef RFPROC
647 #undef RFMEM
648 #undef RFNOWAIT
649 #undef RFCFDG
650 #endif
651 
652 enum
653 {
654 /*	RFNAMEG		= (1<<0), */
655 /*	RFENVG		= (1<<1), */
656 	RFFDG		= (1<<2),
657 	RFNOTEG		= (1<<3),
658 	RFPROC		= (1<<4),
659 	RFMEM		= (1<<5),
660 	RFNOWAIT	= (1<<6),
661 /*	RFCNAMEG	= (1<<10), */
662 /*	RFCENVG		= (1<<11), */
663 	RFCFDG		= (1<<12),
664 /*	RFREND		= (1<<13), */
665 /*	RFNOMNT		= (1<<14) */
666 };
667 
668 extern int		ffork(int, void(*)(void*), void*);
669 
670 typedef
671 struct Qid
672 {
673 	uvlong	path;
674 	ulong	vers;
675 	uchar	type;
676 } Qid;
677 
678 typedef
679 struct Dir {
680 	/* system-modified data */
681 	ushort	type;	/* server type */
682 	uint	dev;	/* server subtype */
683 	/* file data */
684 	Qid	qid;	/* unique id from server */
685 	ulong	mode;	/* permissions */
686 	ulong	atime;	/* last read time */
687 	ulong	mtime;	/* last write time */
688 	vlong	length;	/* file length */
689 	char	*name;	/* last element of path */
690 	char	*uid;	/* owner name */
691 	char	*gid;	/* group name */
692 	char	*muid;	/* last modifier name */
693 } Dir;
694 
695 /* keep /sys/src/ape/lib/ap/plan9/sys9.h in sync with this -rsc */
696 typedef
697 struct Waitmsg
698 {
699 	int pid;	/* of loved one */
700 	ulong time[3];	/* of loved one & descendants */
701 	char	*msg;
702 } Waitmsg;
703 
704 typedef
705 struct IOchunk
706 {
707 	void	*addr;
708 	ulong	len;
709 } IOchunk;
710 
711 extern	void	_exits(char*);
712 
713 extern	void	abort(void);
714 /* extern	int	access(char*, int); <unistd.h> */
715 extern	long	p9alarm(ulong);
716 extern	int	await(char*, int);
717 /* extern	int	bind(char*, char*, int); give up */
718 /* extern	int	brk(void*); <unistd.h> */
719 /* extern	int	chdir(char*); <unistd.h> */
720 extern	int	close(int);
721 extern	int	create(char*, int, ulong);
722 extern	int	p9dup(int, int);
723 extern	int	errstr(char*, uint);
724 extern	int	p9exec(char*, char*[]);
725 /* extern	int	execl(char*, ...); <unistd.h> */
726 extern	int	fork(void);
727 extern	int	p9rfork(int);
728 /* not implemented 
729 extern	int	fauth(int, char*);
730 extern	int	fstat(int, uchar*, int);
731 extern	int	fwstat(int, uchar*, int);
732 extern	int	fversion(int, int, char*, int);
733 extern	int	mount(int, int, char*, int, char*);
734 extern	int	unmount(char*, char*);
735 */
736 extern	int	noted(int);
737 extern	int	notify(void(*)(void*, char*));
738 /* extern	int	open(char*, int); <unistd.h> */
739 extern	int	fd2path(int, char*, int);
740 extern	int	pipe(int*);
741 /* 
742  * use defs from <unistd.h>
743 extern	long	pread(int, void*, long, vlong);
744 extern	long	preadv(int, IOchunk*, int, vlong);
745 extern	long	pwrite(int, void*, long, vlong);
746 extern	long	pwritev(int, IOchunk*, int, vlong);
747 extern	long	read(int, void*, long);
748  */
749 extern	long	readn(int, void*, long);
750 /* extern	long	readv(int, IOchunk*, int); <unistd.h> */
751 extern	int	remove(const char*);
752 /* extern	void*	sbrk(ulong); <unistd.h> */
753 /* extern	long	oseek(int, long, int); */
754 extern	vlong	p9seek(int, vlong, int);
755 /* give up
756 extern	long	segattach(int, char*, void*, ulong);
757 extern	int	segbrk(void*, void*);
758 extern	int	segdetach(void*);
759 extern	int	segflush(void*, ulong);
760 extern	int	segfree(void*, ulong);
761 */
762 extern	int	p9sleep(long);
763 /* extern	int	stat(char*, uchar*, int); give up */
764 extern	Waitmsg*	p9wait(void);
765 extern	int	p9waitpid(void);
766 /* <unistd.h>
767 extern	long	write(int, void*, long);
768 extern	long	writev(int, IOchunk*, int);
769 */
770 /* extern	int	wstat(char*, uchar*, int); give up */
771 extern	ulong	rendezvous(ulong, ulong);
772 
773 #ifndef NOPLAN9DEFINES
774 #define alarm		p9alarm
775 #define	dup		p9dup
776 #define	exec		p9exec
777 #define	seek		p9seek
778 #define sleep		p9sleep
779 #define wait		p9wait
780 #define waitpid		p9waitpid
781 #define rfork		p9rfork
782 #endif
783 
784 extern	Dir*	dirstat(char*);
785 extern	Dir*	dirfstat(int);
786 extern	int	dirwstat(char*, Dir*);
787 extern	int	dirfwstat(int, Dir*);
788 extern	long	dirread(int, Dir**);
789 extern	void	nulldir(Dir*);
790 extern	long	dirreadall(int, Dir**);
791 extern	int	getpid(void);
792 extern	int	getppid(void);
793 extern	void	rerrstr(char*, uint);
794 extern	char*	sysname(void);
795 extern	void	werrstr(char*, ...);
796 
797 /* external names that we don't want to step on */
798 #ifndef NOPLAN9DEFINES
799 #define main	p9main
800 #endif
801 
802 /* compiler directives on plan 9 */
803 #define	USED(x)	if(x){}else{}
804 #define	SET(x)	((x)=0)
805 
806 /* command line */
807 extern char	*argv0;
808 extern void __fixargv0(void);
809 #define	ARGBEGIN	for((argv0?0:(argv0=(__fixargv0(),*argv))),argv++,argc--;\
810 			    argv[0] && argv[0][0]=='-' && argv[0][1];\
811 			    argc--, argv++) {\
812 				char *_args, *_argt;\
813 				Rune _argc;\
814 				_args = &argv[0][1];\
815 				if(_args[0]=='-' && _args[1]==0){\
816 					argc--; argv++; break;\
817 				}\
818 				_argc = 0;\
819 				while(*_args && (_args += chartorune(&_argc, _args)))\
820 				switch(_argc)
821 #define	ARGEND		SET(_argt);USED(_argt);USED(_argc);USED(_args);}USED(argv);USED(argc);
822 #define	ARGF()		(_argt=_args, _args="",\
823 				(*_argt? _argt: argv[1]? (argc--, *++argv): 0))
824 #define	EARGF(x)	(_argt=_args, _args="",\
825 				(*_argt? _argt: argv[1]? (argc--, *++argv): ((x), abort(), (char*)0)))
826 
827 #define	ARGC()		_argc
828 
829 #if defined(__cplusplus)
830 }
831 #endif
832 
833 #endif	/* _LIB9H_ */