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#define ROUND(s, sz) (((s)+((sz)-1))&~((sz)-1))
Block* adjustblock(Block*, int);
Block* allocb(int);
int blocklen(Block*);
char* chanpath(Chan*);
int cangetc(void*);
int canlock(Lock*);
int canputc(void*);
int canqlock(QLock*);
int canrlock(RWlock*);
void chandevinit(void);
void chandevreset(void);
void chandevshutdown(void);
void chanfree(Chan*);
void chanrec(Mnt*);
void checkb(Block*, char*);
Chan* cclone(Chan*);
void cclose(Chan*);
char* clipread(void);
int clipwrite(char*);
void closeegrp(Egrp*);
void closefgrp(Fgrp*);
void closemount(Mount*);
void closepgrp(Pgrp*);
void closergrp(Rgrp*);
void cmderror(Cmdbuf*, char*);
int cmount(Chan*, Chan*, int, char*);
Block* concatblock(Block*);
Block* copyblock(Block*, int);
void cunmount(Chan*, Chan*);
int decref(Ref*);
Chan* devattach(int, char*);
Block* devbread(Chan*, long, ulong);
long devbwrite(Chan*, Block*, ulong);
Chan* devclone(Chan*);
int devconfig(int, char *, DevConf *);
Chan* devcreate(Chan*, char*, int, ulong);
void devdir(Chan*, Qid, char*, vlong, char*, long, Dir*);
long devdirread(Chan*, char*, long, Dirtab*, int, Devgen*);
Devgen devgen;
void devinit(void);
int devno(int, int);
Chan* devopen(Chan*, int, Dirtab*, int, Devgen*);
void devpermcheck(char*, ulong, int);
void devpower(int);
void devremove(Chan*);
void devreset(void);
void devshutdown(void);
int devstat(Chan*, uchar*, int, Dirtab*, int, Devgen*);
Walkqid* devwalk(Chan*, Chan*, char**, int, Dirtab*, int, Devgen*);
int devwstat(Chan*, uchar*, int);
Dir* dirchanstat(Chan*);
void drawcmap(void);
Fgrp* dupfgrp(Fgrp*);
int emptystr(char*);
void envcpy(Egrp*, Egrp*);
int eqchan(Chan*, Chan*, int);
int eqqid(Qid, Qid);
void error(char*);
void exhausted(char*);
void exit(int);
Chan* fdtochan(int, int, int, int);
void free(void*);
void freeb(Block*);
void freeblist(Block*);
uintptr getmalloctag(void*);
uintptr getrealloctag(void*);
void gotolabel(Label*);
char* getconfenv(void);
long hostdomainwrite(char*, int);
long hostownerwrite(char*, int);
Block* iallocb(int);
void ilock(Lock*);
void iunlock(Lock*);
int incref(Ref*);
int iprint(char*, ...);
void isdir(Chan*);
int iseve(void);
#define islo() (0)
int kbdputc(Queue*, int);
void kbdkey(Rune, int);
int kproc(char*, void(*)(void*), void*);
void ksetenv(char*, char*, int);
void kstrcpy(char*, char*, int);
void kstrdup(char**, char*);
long latin1(Rune*, int);
Chan* lfdchan(void *);
void lock(Lock*);
void lockinit(void);
void logopen(Log*);
void logclose(Log*);
char* logctl(Log*, int, char**, Logflag*);
void logn(Log*, int, void*, int);
long logread(Log*, void*, ulong, long);
void log(Log*, int, char*, ...);
Cmdtab* lookupcmd(Cmdbuf*, Cmdtab*, int);
void* mallocz(ulong, int);
#define malloc kmalloc
void* malloc(ulong);
void mkqid(Qid*, vlong, ulong, int);
Chan* mntauth(Chan*, char*);
void mntdump(void);
long mntversion(Chan*, char*, int, int);
Chan* mntattach(Chan*, Chan*, char*, int);
void mountfree(Mount*);
void muxclose(Mnt*);
Chan* namec(char*, int, int, ulong);
Chan* newchan(void);
int newfd(Chan*);
Mhead* newmhead(Chan*);
Mount* newmount(Chan*, int, char*);
Path* newpath(char*);
Pgrp* newpgrp(void);
Rgrp* newrgrp(void);
Proc* newproc(void);
char* nextelem(char*, char*);
void nexterror(void);
int openmode(ulong);
void* oscmd(char**, int, char*, Chan**);
int oscmdwait(void*, char*, int);
int oscmdkill(void*);
void oscmdfree(void*);
void oserrstr(void);
void oserror(void);
void osexit(void);
Block* packblock(Block*);
Block* padblock(Block*, int);
void panic(char*, ...);
Cmdbuf* parsecmd(char *a, int n);
void pathclose(Path*);
void pexit(char*, int);
void printinit(void);
int procindex(ulong);
void pgrpcpy(Pgrp*, Pgrp*);
void pgrpnote(ulong, char*, long, int);
Pgrp* pgrptab(int);
#define poperror() up->nerrlab--
int postnote(Proc*, int, char*, int);
int pprint(char*, ...);
int procfdprint(Chan*, int, int, char*, int);
void procinit0(void);
Proc* proctab(int);
void procwired(Proc*, int);
int pullblock(Block**, int);
Block* pullupblock(Block*, int);
Block* pullupqueue(Queue*, int);
void putmhead(Mhead*);
void putstr(char*);
void putstrn(char*, int);
Label* pwaserror(void);
long readblist(Block*, uchar*, long, ulong);
int qaddlist(Queue*, Block*);
Block* qbread(Queue*, int);
long qbwrite(Queue*, Block*);
Queue* qbypass(void (*)(void*, Block*), void*);
int qcanread(Queue*);
void qclose(Queue*);
int qconsume(Queue*, void*, int);
Block* qcopy(Queue*, int, ulong);
int qdiscard(Queue*, int);
void qflush(Queue*);
void qfree(Queue*);
int qfull(Queue*);
Block* qget(Queue*);
void qhangup(Queue*, char*);
int qisclosed(Queue*);
void qinit(void);
int qiwrite(Queue*, void*, int);
int qlen(Queue*);
void qlock(QLock*);
Queue* qopen(int, int, void (*)(void*), void*);
int qpass(Queue*, Block*);
int qpassnolim(Queue*, Block*);
int qproduce(Queue*, void*, int);
void qputback(Queue*, Block*);
long qread(Queue*, void*, int);
Block* qremove(Queue*);
void qreopen(Queue*);
void qsetlimit(Queue*, int);
void qunlock(QLock*);
int qwindow(Queue*);
int qwrite(Queue*, void*, int);
void qnoblock(Queue*, int);
void randominit(void);
ulong randomread(void*, ulong);
int readnum(ulong, char*, ulong, ulong, int);
int readstr(ulong, char*, ulong, char*);
int return0(void*);
void rlock(RWlock*);
void runlock(RWlock*);
extern void (*screenputs)(char*, int);
void* secalloc(ulong);
void secfree(void*);
long seconds(void);
int setlabel(Label*);
void setmalloctag(void*, uintptr);
void setrealloctag(void*, uintptr);
long showfilewrite(char*, int);
char* skipslash(char*);
void sleep(Rendez*, int(*)(void*), void*);
void* smalloc(ulong);
int splhi(void);
int spllo(void);
void splx(int);
Block* trimblock(Block*, int, int);
long unionread(Chan*, void*, long);
void unlock(Lock*);
#define validaddr(a, b, c)
void validname(char*, int);
char* validnamedup(char*, int);
void validstat(uchar*, int);
void* vmemchr(void*, int, int);
Proc* wakeup(Rendez*);
int walk(Chan**, char**, int, int, int*);
#define waserror() (setjmp(pwaserror()->buf))
void wlock(RWlock*);
void wunlock(RWlock*);
void osyield(void);
void osmsleep(int);
ulong ticks(void);
void osproc(Proc*);
void osnewproc(Proc*);
void procsleep(void);
void procwakeup(Proc*);
void osinit(void);
void screeninit(void);
extern void terminit(void);
extern void setterm(int);
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