1990/1110/port/devsrv.c (diff list | history)

1990/1002/sys/src/9/port/devsrv.c:7,27 – 1990/1110/sys/src/9/port/devsrv.c:7,28 (short | long | prev | next)
1990/0227		#include "devtab.h"
1990/1002		#include "fcall.h"
1990/0227
1990/1002		void *calloc(unsigned int, unsigned int);
1990/1110		void *calloc(unsigned, unsigned);
1990/1002		void free(void *); /* This structure holds the contents of a directory entry. Entries are kept * in a linked list. */ struct entry {
1990/1110		typedef struct Entry Entry; struct Entry {
1990/0227		Lock;
1990/1002		struct entry *next; /* next entry */ struct entry **back; /* entry pointer */ struct entry *parent; /* parent directory */
1990/1110		Entry *next; /* next entry */ Entry **back; /* entry pointer */ Entry *parent; /* parent directory */
1990/1002		Dir dir; /* dir structure */ union { Chan *chan; /* if not a subdirectory */ struct entry *entries; /* directory entries */
1990/1110		union{ Chan *chan; /* if not a subdirectory */ Entry *entries; /* directory entries */
1990/1002		}; };
1990/0227
1990/1002/sys/src/9/port/devsrv.c:35,45 – 1990/1110/sys/src/9/port/devsrv.c:36,48
1990/0227		{ }
1990/1002		struct entry *srv_alloc(int mode){ struct entry *e = calloc(1, sizeof(*e));
1990/1110		Entry * srvalloc(int mode){ Entry *e;
1990/1002		static Lock qidlock; static nextqid;
1990/1110		e = calloc(1, sizeof(Entry));
1990/1002		e->dir.atime = e->dir.mtime = seconds(); lock(&qidlock); /* for qid allocation */ e->dir.qid = mode | nextqid++;
1990/1002/sys/src/9/port/devsrv.c:52,62 – 1990/1110/sys/src/9/port/devsrv.c:55,65
1990/0227		{
1990/1002		Chan *c; static Lock rootlock; static struct entry *root;
1990/1110		static Entry *root;
1990/1002		lock(&rootlock); if (root == 0) { root = srv_alloc(CHDIR);
1990/1110		if(root==0){ root = srvalloc(CHDIR);
1990/1002		root->dir.mode = CHDIR | 0777; } unlock(&rootlock);
1990/1002/sys/src/9/port/devsrv.c:77,99 – 1990/1110/sys/src/9/port/devsrv.c:80,102
1990/0227		int srvwalk(Chan *c, char *name) {
1990/1002		struct entry *dir, *e;
1990/1110		Entry *dir, *e;
1990/1002		isdir(c); if (strcmp(name, ".") == 0)
1990/1110		if(strcmp(name, ".") == 0)
1990/1002		return 1; if ((dir = c->aux) == 0)
1990/1110		if((dir=c->aux) == 0)
1990/1002		panic("bad aux pointer in srvwalk"); if (strcmp(name, "..") == 0)
1990/1110		if(strcmp(name, "..") == 0)
1990/1002		e = dir->parent; else {
1990/1110		else{
1990/1002		lock(dir); for (e = dir->entries; e != 0; e = e->next)
1990/1110		for(e=dir->entries; e; e=e->next)
1990/1002		if (strcmp(name, e->dir.name) == 0) break; unlock(dir); } if (e == 0) {
1990/1110		if(e==0){
1990/1002		u->error.code = Enonexist; u->error.type = 0; u->error.dev = 0;
1990/1002/sys/src/9/port/devsrv.c:107,114 – 1990/1110/sys/src/9/port/devsrv.c:110,118
1990/0227		void srvstat(Chan *c, char *db) {
1990/1002		struct entry *e = c->aux;
1990/1110		Entry *e;
1990/1002
1990/1110		e = c->aux;
1990/1002		convD2M(&e->dir, db);
1990/0227		}
1990/1002/sys/src/9/port/devsrv.c:115,125 – 1990/1110/sys/src/9/port/devsrv.c:119,129
1990/0227		Chan * srvopen(Chan *c, int omode) {
1990/1002		struct entry *e;
1990/1110		Entry *e;
1990/0227		Chan *f;
1990/1002		if (c->qid & CHDIR) { if (omode != OREAD)
1990/1110		if(c->qid & CHDIR){ if(omode != OREAD)
1990/0227		error(0, Eisdir); c->mode = omode; c->flag |= COPEN;
1990/1002/sys/src/9/port/devsrv.c:126,138 – 1990/1110/sys/src/9/port/devsrv.c:130,142
1990/0227		c->offset = 0; return c; }
1990/1002		if ((e = c->aux) == 0) panic("bad aux pointer in srvopen"); if ((f = e->chan) == 0)
1990/1110		if((e=c->aux) == 0) error(0, Egreg); if((f=e->chan) == 0)
1990/0227		error(0, Eshutdown);
1990/1002		if (omode & OTRUNC)
1990/1110		if(omode & OTRUNC)
1990/0227		error(0, Eperm);
1990/1002		if (omode != f->mode && f->mode != ORDWR)
1990/1110		if(omode!=f->mode && f->mode!=ORDWR)
1990/0227		error(0, Eperm); close(c); incref(f);
1990/1002/sys/src/9/port/devsrv.c:142,166 – 1990/1110/sys/src/9/port/devsrv.c:146,172
1990/0227		void srvcreate(Chan *c, char *name, int omode, ulong perm) {
1990/1002		struct entry *parent = c->aux, *e;
1990/1110		Entry *parent, *e;
1990/0227
1990/1110		parent = c->aux;
1990/1002		isdir(c); lock(parent); if (waserror()) {
1990/1110		if (waserror()){
1990/1002		unlock(parent);
1990/0227		nexterror(); }
1990/1002		for (e = parent->entries; e != 0; e = e->next) if (strcmp(name, e->dir.name) == 0)
1990/1110		for(e=parent->entries; e; e=e->next) if(strcmp(name, e->dir.name) == 0)
1990/0227		error(0, Einuse);
1990/1002		e = srv_alloc(perm & CHDIR);
1990/1110		e = srvalloc(perm & CHDIR);
1990/1002		e->parent = parent; strcpy(e->dir.name, name); e->dir.mode = perm & parent->dir.mode; e->dir.gid = parent->dir.gid; if ((e->next = parent->entries) != 0)
1990/1110		if(e->next = parent->entries) /* assign = */
1990/1002		e->next->back = &e->next; *(e->back = &parent->entries) = e;
1990/1110		e->back = &parent->entries; *e->back = e;
1990/1002		parent->dir.mtime = e->dir.mtime; unlock(parent); poperror();
1990/1002/sys/src/9/port/devsrv.c:173,197 – 1990/1110/sys/src/9/port/devsrv.c:179,203
1990/0227		void srvremove(Chan *c) {
1990/1002		struct entry *e = c->aux;
1990/1110		Entry *e;
1990/0227
1990/1002		if (e->parent == 0)
1990/1110		e = c->aux; if(e->parent == 0)
1990/0227		error(0, Eperm);
1990/1002		lock(e->parent); if (waserror()) {
1990/1110		if(waserror()){
1990/1002		unlock(e->parent);
1990/0227		nexterror(); }
1990/1002		if (e->dir.mode & CHDIR) {
1990/1110		if(e->dir.mode & CHDIR){
1990/1002		if (e->entries != 0) error(0, Eperm); } else { if (e->chan == 0)
1990/1110		}else{ if(e->chan == 0)
1990/1002		error(0, Eshutdown); close(e->chan); } if ((*e->back = e->next) != 0)
1990/1110		if(*e->back = e->next) /* assign = */
1990/1002		e->next->back = e->back; unlock(e->parent);
1990/0227		poperror();
1990/1002/sys/src/9/port/devsrv.c:213,223 – 1990/1110/sys/src/9/port/devsrv.c:219,231
1990/1002		* to a list of entries in this directory. Count is the size to be * read. */ int srv_direntry(struct entry *e, char *a, long count){
1990/1110		int srvdirentry(Entry *e, char *a, long count){
1990/1002		Dir dir; int n = 0;
1990/1110		int n;
1990/1002		while (n != count && e != 0) {
1990/1110		n = 0; while(n!=count && e!=0){
1990/1002		n += convD2M(&e->dir, a + n); e = e->next; }
1990/1002/sys/src/9/port/devsrv.c:227,249 – 1990/1110/sys/src/9/port/devsrv.c:235,258
1990/0227		long srvread(Chan *c, void *va, long n) {
1990/1002		struct entry *dir = c->aux, *e; int offset = c->offset;
1990/1110		Entry *dir, *e; int offset;
1990/0227
1990/1110		dir = c->aux; offset = c->offset;
1990/1002		isdir(c); if (n <= 0)
1990/1110		if(n <= 0)
1990/1002		return 0; if ((offset % DIRLEN) != 0 || (n % DIRLEN) != 0) error(0, Egreg);
1990/1110		if(offset%DIRLEN || n%DIRLEN) error(0, Ebaddirread);
1990/1002		lock(dir); for (e = dir->entries; e != 0; e = e->next) if (offset <= 0) { n = srv_direntry(e, va, n);
1990/1110		for(e=dir->entries; e; e=e->next) if(offset <= 0){ n = srvdirentry(e, va, n);
1990/1002		unlock(dir); c->offset += n; return n; } else
1990/1110		}else
1990/1002		offset -= DIRLEN; unlock(dir); return 0;
1990/1002/sys/src/9/port/devsrv.c:252,271 – 1990/1110/sys/src/9/port/devsrv.c:261,281
1990/0227		long srvwrite(Chan *c, void *va, long n) {
1990/1002		struct entry *e = c->aux;
1990/1110		Entry *e;
1990/0227		int i, fd; char buf[32];
1990/1002		if (e->dir.mode & CHDIR)
1990/1110		e = c->aux; if(e->dir.mode & CHDIR)
1990/1002		panic("write to directory"); lock(e); if (waserror()) {
1990/1110		if(waserror()){
1990/1002		unlock(e); nexterror(); } if (e->chan != 0)
1990/1110		if(e->chan)
1990/0227		error(0, Egreg);
1990/1002		if (n >= sizeof buf)
1990/1110		if(n >= sizeof buf)
1990/0227		error(0, Egreg); memcpy(buf, va, n); /* so we can NUL-terminate */ buf[n] = 0;