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plan9fox/sys/src/cmd/cwfs/9p1lib.c
cinap_lenrek 8e11ff283f cwfs: make /srv/cwfs.cmd redable to receive command output 
before, cwfs would print everything to /dev/cons. this change
will redirect the output of commands to the /srv/cwfs.cmd pipe
so one can use:

con -C /srv/cwfs.cmd

and not have the fish for the output in /dev/kmesg.

use standard error (/dev/cons) for unsolicited messages as
there is not always a reader on the command file.
2012-07-13 15:09:39 +02:00

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#include "all.h"
/* BUG transition */
// int client9p = 2;
// int kernel9p = 2;
#include "9p1.h"
#define CHAR(x) *p++ = f->x
#define SHORT(x) { ulong vvv = f->x; *p++ = vvv; *p++ = vvv>>8; }
#define LONGINT(q) {*p++ = (q); *p++ = (q)>>8; *p++ = (q)>>16; *p++ = (q)>>24;}
#define LONG(x) { ulong vvv = f->x; LONGINT(vvv); }
#define VLONG(x) { \
uvlong q = f->x; \
*p++ = (q)>> 0; *p++ = (q)>> 8; *p++ = (q)>>16; *p++ = (q)>>24; \
*p++ = (q)>>32; *p++ = (q)>>40; *p++ = (q)>>48; *p++ = (q)>>56; \
}
#define BYTES(x,n) memmove(p, f->x, n); p += n
#define STRING(x,n) strncpy((char*)p, f->x, n); p += n
int
convS2M9p1(Fcall *f, uchar *ap)
{
uchar *p;
int t;
p = ap;
CHAR(type);
t = f->type;
SHORT(tag);
switch(t) {
default:
fprint(2, "convS2M9p1: bad type: %d\n", t);
return 0;
case Tnop:
case Tosession:
break;
case Tsession:
BYTES(chal, sizeof(f->chal));
break;
case Tflush:
SHORT(oldtag);
break;
case Tattach:
SHORT(fid);
STRING(uname, sizeof(f->uname));
STRING(aname, sizeof(f->aname));
BYTES(ticket, sizeof(f->ticket));
BYTES(auth, sizeof(f->auth));
break;
case Toattach:
SHORT(fid);
STRING(uname, sizeof(f->uname));
STRING(aname, sizeof(f->aname));
BYTES(ticket, NAMELEN);
break;
case Tclone:
SHORT(fid);
SHORT(newfid);
break;
case Twalk:
SHORT(fid);
STRING(name, sizeof(f->name));
break;
case Tclwalk:
SHORT(fid);
SHORT(newfid);
STRING(name, sizeof(f->name));
break;
case Topen:
SHORT(fid);
CHAR(mode);
break;
case Tcreate:
SHORT(fid);
STRING(name, sizeof(f->name));
LONG(perm);
CHAR(mode);
break;
case Tread:
SHORT(fid);
VLONG(offset);
SHORT(count);
break;
case Twrite:
SHORT(fid);
VLONG(offset);
SHORT(count);
p++;
if((uchar*)p == (uchar*)f->data) {
p += f->count;
break;
}
BYTES(data, f->count);
break;
case Tclunk:
case Tremove:
case Tstat:
SHORT(fid);
break;
case Twstat:
SHORT(fid);
BYTES(stat, sizeof(f->stat));
break;
/*
*/
case Rnop:
case Rosession:
case Rflush:
break;
case Rsession:
BYTES(chal, sizeof(f->chal));
BYTES(authid, sizeof(f->authid));
BYTES(authdom, sizeof(f->authdom));
break;
case Rerror:
STRING(ename, sizeof(f->ename));
break;
case Rclone:
case Rclunk:
case Rremove:
case Rwstat:
SHORT(fid);
break;
case Rwalk:
case Ropen:
case Rcreate:
case Rclwalk:
SHORT(fid);
LONG(qid.path);
LONG(qid.version);
break;
case Rattach:
SHORT(fid);
LONG(qid.path);
LONG(qid.version);
BYTES(rauth, sizeof(f->rauth));
break;
case Roattach:
SHORT(fid);
LONG(qid.path);
LONG(qid.version);
break;
case Rread:
SHORT(fid);
SHORT(count);
p++;
if((uchar*)p == (uchar*)f->data) {
p += f->count;
break;
}
BYTES(data, f->count);
break;
case Rwrite:
SHORT(fid);
SHORT(count);
break;
case Rstat:
SHORT(fid);
BYTES(stat, sizeof(f->stat));
break;
}
return p - (uchar*)ap;
}
/*
* buggery to give false qid for
* the top 2 levels of the dump fs
*/
static ulong
fakeqid9p1(Dentry *f)
{
ulong q;
int c;
q = f->qid.path;
if(q == (QPROOT|QPDIR)) {
c = f->name[0];
if(isascii(c) && isdigit(c)) {
q = 3|QPDIR;
c = (c-'0')*10 + (f->name[1]-'0');
if(c >= 1 && c <= 12)
q = 4|QPDIR;
}
}
return q;
}
int
convD2M9p1(Dentry *f, char *ap)
{
uchar *p;
ulong q;
p = (uchar*)ap;
STRING(name, sizeof(f->name));
memset(p, 0, 2*NAMELEN);
uidtostr((char*)p, f->uid, 1);
p += NAMELEN;
uidtostr((char*)p, f->gid, 1);
p += NAMELEN;
q = fakeqid9p1(f);
LONGINT(q);
LONG(qid.version);
q = f->mode & 0x0fff;
if(f->mode & DDIR)
q |= PDIR;
if(f->mode & DAPND)
q |= PAPND;
if(f->mode & DLOCK)
q |= PLOCK;
LONGINT(q);
LONG(atime);
LONG(mtime);
VLONG(size);
LONGINT(0);
return p - (uchar*)ap;
}
int
convA2M9p1(Authenticator *f, char *ap, char *key)
{
int n;
uchar *p;
p = (uchar*)ap;
CHAR(num);
BYTES(chal, CHALLEN);
LONG(id);
n = p - (uchar*)ap;
if(key)
encrypt(key, ap, n);
return n;
}
#undef CHAR
#undef SHORT
#undef LONG
#undef LONGINT
#undef VLONG
#undef BYTES
#undef STRING
#define CHAR(x) f->x = *p++
#define SHORT(x) f->x = (p[0] | (p[1]<<8)); p += 2
#define LONG(x) f->x = p[0] | (p[1]<<8) | (p[2]<<16) | (p[3]<<24); p += 4
#define VLONG(x) { \
f->x = (p[0] | (p[1]<<8) | (p[2]<<16) | (p[3]<<24)) | \
(uvlong)(p[4] | (p[5]<<8) | (p[6]<<16) | (p[7]<<24)) << 32; \
p += 8; \
}
#define BYTES(x,n) memmove(f->x, p, n); p += n
#define STRING(x,n) memmove(f->x, p, n); p += n
int
convM2S9p1(uchar *ap, Fcall *f, int n)
{
uchar *p;
int t;
p = ap;
CHAR(type);
t = f->type;
SHORT(tag);
switch(t) {
default:
/*
* only whine if it couldn't be a 9P2000 Tversion.
*/
if(t != 19 || ap[4] != 100)
fprint(2, "convM2S9p1: bad type: %d\n", f->type);
return 0;
case Tnop:
case Tosession:
break;
case Tsession:
BYTES(chal, sizeof(f->chal));
break;
case Tflush:
SHORT(oldtag);
break;
case Tattach:
SHORT(fid);
BYTES(uname, sizeof(f->uname));
BYTES(aname, sizeof(f->aname));
BYTES(ticket, sizeof(f->ticket));
BYTES(auth, sizeof(f->auth));
break;
case Toattach:
SHORT(fid);
BYTES(uname, sizeof(f->uname));
BYTES(aname, sizeof(f->aname));
BYTES(ticket, NAMELEN);
break;
case Tclone:
SHORT(fid);
SHORT(newfid);
break;
case Twalk:
SHORT(fid);
BYTES(name, sizeof(f->name));
break;
case Tclwalk:
SHORT(fid);
SHORT(newfid);
BYTES(name, sizeof(f->name));
break;
case Tremove:
SHORT(fid);
break;
case Topen:
SHORT(fid);
CHAR(mode);
break;
case Tcreate:
SHORT(fid);
BYTES(name, sizeof(f->name));
LONG(perm);
CHAR(mode);
break;
case Tread:
SHORT(fid);
VLONG(offset);
SHORT(count);
break;
case Twrite:
SHORT(fid);
VLONG(offset);
SHORT(count);
p++;
f->data = (char*)p; p += f->count;
break;
case Tclunk:
case Tstat:
SHORT(fid);
break;
case Twstat:
SHORT(fid);
BYTES(stat, sizeof(f->stat));
break;
/*
*/
case Rnop:
case Rosession:
break;
case Rsession:
BYTES(chal, sizeof(f->chal));
BYTES(authid, sizeof(f->authid));
BYTES(authdom, sizeof(f->authdom));
break;
case Rerror:
BYTES(ename, sizeof(f->ename));
break;
case Rflush:
break;
case Rclone:
case Rclunk:
case Rremove:
case Rwstat:
SHORT(fid);
break;
case Rwalk:
case Rclwalk:
case Ropen:
case Rcreate:
SHORT(fid);
LONG(qid.path);
LONG(qid.version);
break;
case Rattach:
SHORT(fid);
LONG(qid.path);
LONG(qid.version);
BYTES(rauth, sizeof(f->rauth));
break;
case Roattach:
SHORT(fid);
LONG(qid.path);
LONG(qid.version);
break;
case Rread:
SHORT(fid);
SHORT(count);
p++;
f->data = (char*)p; p += f->count;
break;
case Rwrite:
SHORT(fid);
SHORT(count);
break;
case Rstat:
SHORT(fid);
BYTES(stat, sizeof(f->stat));
break;
}
if((uchar*)ap+n == p)
return n;
return 0;
}
int
convM2D9p1(char *ap, Dentry *f)
{
uchar *p;
char str[NAMELEN];
p = (uchar*)ap;
BYTES(name, sizeof(f->name));
memmove(str, p, NAMELEN);
p += NAMELEN;
f->uid = strtouid(str);
memmove(str, p, NAMELEN);
p += NAMELEN;
f->gid = strtouid(str);
LONG(qid.path);
LONG(qid.version);
LONG(atime);
f->mode = (f->atime & 0x0fff) | DALLOC;
if(f->atime & PDIR)
f->mode |= DDIR;
if(f->atime & PAPND)
f->mode |= DAPND;
if(f->atime & PLOCK)
f->mode |= DLOCK;
LONG(atime);
LONG(mtime);
VLONG(size);
p += 4;
return p - (uchar*)ap;
}
void
convM2A9p1(char *ap, Authenticator *f, char *key)
{
uchar *p;
if(key)
decrypt(key, ap, AUTHENTLEN);
p = (uchar*)ap;
CHAR(num);
BYTES(chal, CHALLEN);
LONG(id);
USED(p);
}
void
convM2T9p1(char *ap, Ticket *f, char *key)
{
uchar *p;
if(key)
decrypt(key, ap, TICKETLEN);
p = (uchar*)ap;
CHAR(num);
BYTES(chal, CHALLEN);
STRING(cuid, NAMELEN);
f->cuid[NAMELEN-1] = 0;
STRING(suid, NAMELEN);
f->suid[NAMELEN-1] = 0;
BYTES(key, DESKEYLEN);
USED(p);
}
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