tmore functions - plan9port - [fork] Plan 9 from user space
(HTM) git clone git://src.adamsgaard.dk/plan9port
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---
(DIR) commit 73a5509ae929e41ca0047254a880c8efd4aa72a1
(DIR) parent 9b3357a896417eb166cf94dd2a04aa391fef21c8
(HTM) Author: rsc <devnull@localhost>
Date: Sun, 23 Jul 2006 02:55:34 +0000
more functions
Diffstat:
M include/9pclient.h | 7 +++++++
M man/man3/9pclient.3 | 63 ++++++++++++++++++++++++++++++-
M src/lib9pclient/create.c | 33 +++++++++++++++++++------------
M src/lib9pclient/fs.c | 18 ++++++++++++++++--
M src/lib9pclient/open.c | 22 ++++++++++++++++------
M src/lib9pclient/openfd.c | 2 +-
M src/lib9pclient/remove.c | 2 +-
M src/lib9pclient/stat.c | 2 +-
M src/lib9pclient/walk.c | 2 +-
M src/lib9pclient/wstat.c | 2 +-
10 files changed, 125 insertions(+), 28 deletions(-)
---
(DIR) diff --git a/include/9pclient.h b/include/9pclient.h
t@@ -47,8 +47,15 @@ CFid *fscreate(CFsys*, char*, int, ulong);
int fsaccess(CFsys*, char*, int);
int fsvprint(CFid*, char*, va_list);
int fsprint(CFid*, char*, ...);
+Qid fsqid(CFid*);
+
+/* manipulate unopened fids */
+CFid *fswalk(CFid*, char*);
+int fsfopen(CFid*, int);
+int fsfcreate(CFid*, char*, int, ulong);
extern int chatty9pclient;
+extern int eofkill9pclient;
#ifdef __cplusplus
}
(DIR) diff --git a/man/man3/9pclient.3 b/man/man3/9pclient.3
t@@ -1,6 +1,6 @@
.TH 9PCLIENT 3
.SH NAME
-CFid, CFsys, fsinit, fsmount, fsroot, fssetroot, fsunmount, nsinit, nsmount, fsversion, fsauth, fsattach, fsclose, fscreate, fsremove, fsfremove, fsaccess, fsdirread, fsdirreadall, fsdirstat, fsdirfstat, fsdirwstat, fsdirfwstat, fsopen, nsopen, fsopenfd, fspread, fspwrite, fsread, fsreadn, fsseek, fswrite, fsprint, fsvprint \- 9P client library
+CFid, CFsys, fsinit, fsmount, fsroot, fssetroot, fsunmount, nsinit, nsmount, fsversion, fsauth, fsattach, fsclose, fscreate, fsfcreate, fsremove, fsfremove, fsaccess, fsdirread, fsdirreadall, fsdirstat, fsdirfstat, fsdirwstat, fsdirfwstat, fsopen, fsfopen, nsopen, fsopenfd, fspread, fspwrite, fsread, fsreadn, fsseek, fswrite, fsprint, fsvprint \- 9P client library
.SH SYNOPSIS
.B #include <u.h>
.PP
t@@ -50,6 +50,9 @@ void fsclose(CFid *fid)
CFid* fscreate(CFsys *fs, char *path, int mode, ulong perm)
.PP
.B
+int fsfcreate(CFid *fid, char *path, int mode, ulong perm)
+.PP
+.B
int fsremove(CFSys *fs, char *path)
.PP
.B
t@@ -62,6 +65,9 @@ int fsaccess(CFsys *fs, char *path, int amode)
CFid* fsopen(CFsys *fs, char *path, int mode)
.PP
.B
+int fsfopen(CFid *fid, char *path, int mode)
+.PP
+.B
long fspread(CFid *fid, void *buf, long n, vlong offset)
.PP
.B
t@@ -86,6 +92,9 @@ int fsvprint(CFid *fid, char *fmt, ...)
vlong fsseek(CFid *Fid, vlong n, int type)
.PP
.B
+Qid fsqid(CFid *fid)
+.PP
+.B
long fsdirread(CFid *fid, Dir **d)
.PP
.B
t@@ -108,6 +117,12 @@ int fsopenfd(CFsys *fs, char *path, int mode)
.PP
.B
CFsys* nsopen(char *name, char *aname, char *path, int mode)
+.PP
+.B
+extern int chatty9pclient;
+.PP
+.B
+extern int eofkill9pclient;
.SH DESCRIPTION
The
.I 9pclient
t@@ -218,6 +233,9 @@ Fids are not reference counted: when
.I fsclose
is called, the clunk transaction and freeing of storage
happen immediately.
+Despite its name,
+.I fsclose
+can be used to clunk fids that are not open for I/O.
.PP
.I Fscreate
and
t@@ -249,7 +267,25 @@ dot
.RB ( . )
are ignored.
.PP
-Once opened, these fids can be read and written using
+Alternately,
+.I fswalk
+walks from a fid to a given name
+to create a new fid.
+The name may be nil, corresponding to a walk with no names.
+Otherwise the name is taken as a slash-separated sequence
+of path elements.
+.I Fsfcreate
+and
+.I fsfopen
+issue
+.I create
+and
+.I open
+transactions using the passed fid argument,
+which should have been obtained by calling
+.IR fswalk .
+.PP
+Once opened, fids can be read and written using
.I fspread
and
.IR fspwrite ,
t@@ -291,6 +327,17 @@ repeatedly to obtain exactly
.I n
bytes of data, unless it encounters end-of-file or an error.
.PP
+.IR Attach ,
+.IR walk ,
+.IR create ,
+and
+.I open
+transactions include in their replies an updated qid for the
+fid being manipulated.
+.I Fsqid
+returns the most recent qid returned by one of these transactions
+for the given fid.
+.PP
.I Fsaccess
behaves like Unix's
.IR access (2).
t@@ -386,6 +433,18 @@ opens a single file on a name space server: it runs
.IR fsopen ,
and then
.IR fsunmount .
+.PP
+If the
+.B chatty9pclient
+flag is set, the library prints all 9P messages
+to standard error.
+If the
+.B eofkill9pclient
+flag is set, the library calls
+.I threadexitsall
+(see
+.IR thread (3))
+when it detects EOF on a 9P connection.
.SH SOURCE
.B \*9/src/lib9pclient
.SH SEE ALSO
(DIR) diff --git a/src/lib9pclient/create.c b/src/lib9pclient/create.c
t@@ -4,11 +4,26 @@
#include <9pclient.h>
#include "fsimpl.h"
+int
+fsfcreate(CFid *fid, char *name, int mode, ulong perm)
+{
+ Fcall tx, rx;
+
+ tx.type = Tcreate;
+ tx.name = name;
+ tx.fid = fid->fid;
+ tx.mode = mode;
+ tx.perm = perm;
+ if(_fsrpc(fid->fs, &tx, &rx, 0) < 0)
+ return -1;
+ fid->mode = mode;
+ return 0;
+}
+
CFid*
fscreate(CFsys *fs, char *name, int mode, ulong perm)
{
CFid *fid;
- Fcall tx, rx;
char *p, *dir, *elem;
p = strrchr(name, '/');
t@@ -21,24 +36,16 @@ fscreate(CFsys *fs, char *name, int mode, ulong perm)
elem = p+1;
}
- if((fid = _fswalk(fs->root, dir)) == nil){
+ if((fid = fswalk(fs->root, dir)) == nil){
if(p)
*p = '/';
return nil;
}
- tx.type = Tcreate;
- tx.name = elem;
- tx.fid = fid->fid;
- tx.mode = mode;
- tx.perm = perm;
- if(_fsrpc(fs, &tx, &rx, 0) < 0){
- if(p)
- *p = '/';
+ if(p)
+ *p = '/';
+ if(fsfcreate(fid, elem, mode, perm) < 0){
fsclose(fid);
return nil;
}
- if(p)
- *p = '/';
- fid->mode = mode;
return fid;
}
(DIR) diff --git a/src/lib9pclient/fs.c b/src/lib9pclient/fs.c
t@@ -14,6 +14,7 @@ static int _fsgettag(Mux*, void*);
static int _fssettag(Mux*, void*, uint);
int chatty9pclient;
+int eofkill9pclient;
enum
{
t@@ -318,9 +319,13 @@ static int
_fssend(Mux *mux, void *pkt)
{
CFsys *fs;
+ int n;
fs = mux->aux;
- return iowrite(fs->iosend, fs->fd, pkt, GBIT32((uchar*)pkt));
+ n = iowrite(fs->iosend, fs->fd, pkt, GBIT32((uchar*)pkt));
+ if(n < 0 && eofkill9pclient)
+ threadexitsall(nil);
+ return n;
}
static void*
t@@ -333,8 +338,11 @@ _fsrecv(Mux *mux)
fs = mux->aux;
n = ioreadn(fs->iorecv, fs->fd, buf, 4);
- if(n != 4)
+ if(n != 4){
+ if(eofkill9pclient)
+ threadexitsall(nil);
return nil;
+ }
n = GBIT32(buf);
pkt = malloc(n+4);
if(pkt == nil){
t@@ -356,3 +364,9 @@ _fsrecv(Mux *mux)
}
return pkt;
}
+
+Qid
+fsqid(CFid *fid)
+{
+ return fid->qid;
+}
(DIR) diff --git a/src/lib9pclient/open.c b/src/lib9pclient/open.c
t@@ -4,19 +4,29 @@
#include <9pclient.h>
#include "fsimpl.h"
+int
+fsfopen(CFid *fid, int mode)
+{
+ Fcall tx, rx;
+
+ tx.type = Topen;
+ tx.fid = fid->fid;
+ tx.mode = mode;
+ if(_fsrpc(fid->fs, &tx, &rx, 0) < 0)
+ return -1;
+ fid->mode = mode;
+ return 0;
+}
+
CFid*
fsopen(CFsys *fs, char *name, int mode)
{
char e[ERRMAX];
CFid *fid;
- Fcall tx, rx;
- if((fid = _fswalk(fs->root, name)) == nil)
+ if((fid = fswalk(fs->root, name)) == nil)
return nil;
- tx.type = Topen;
- tx.fid = fid->fid;
- tx.mode = mode;
- if(_fsrpc(fs, &tx, &rx, 0) < 0){
+ if(fsfopen(fid, mode) < 0){
rerrstr(e, sizeof e);
fsclose(fid);
errstr(e, sizeof e);
(DIR) diff --git a/src/lib9pclient/openfd.c b/src/lib9pclient/openfd.c
t@@ -10,7 +10,7 @@ fsopenfd(CFsys *fs, char *name, int mode)
CFid *fid;
Fcall tx, rx;
- if((fid = _fswalk(fs->root, name)) == nil)
+ if((fid = fswalk(fs->root, name)) == nil)
return -1;
tx.type = Topenfd;
tx.fid = fid->fid;
(DIR) diff --git a/src/lib9pclient/remove.c b/src/lib9pclient/remove.c
t@@ -12,7 +12,7 @@ fsremove(CFsys *fs, char *name)
{
CFid *fid;
- if((fid = _fswalk(fs->root, name)) == nil)
+ if((fid = fswalk(fs->root, name)) == nil)
return -1;
return fsfremove(fid);
}
(DIR) diff --git a/src/lib9pclient/stat.c b/src/lib9pclient/stat.c
t@@ -13,7 +13,7 @@ fsdirstat(CFsys *fs, char *name)
Dir *d;
CFid *fid;
- if((fid = _fswalk(fs->root, name)) == nil)
+ if((fid = fswalk(fs->root, name)) == nil)
return nil;
d = fsdirfstat(fid);
(DIR) diff --git a/src/lib9pclient/walk.c b/src/lib9pclient/walk.c
t@@ -8,7 +8,7 @@
#include "fsimpl.h"
CFid*
-_fswalk(CFid *fid, char *oname)
+fswalk(CFid *fid, char *oname)
{
char *freep, *name;
int i, nwalk;
(DIR) diff --git a/src/lib9pclient/wstat.c b/src/lib9pclient/wstat.c
t@@ -13,7 +13,7 @@ fsdirwstat(CFsys *fs, char *name, Dir *d)
int n;
CFid *fid;
- if((fid = _fswalk(fs->root, name)) == nil)
+ if((fid = fswalk(fs->root, name)) == nil)
return -1;
n = fsdirfwstat(fid, d);