commit - 0fcd970331d664ae6ae2b7a414efb086361ceff7
commit + daefa1a92f688399290f231c4c738ef99e7b8ab4
blob - 8a0d342f7282f7c4b170b3d0958a1e0fa90fa62f
blob + e8beed4fad48344c795bd6ef35f461f69b626202
--- include/9pclient.h
+++ include/9pclient.h
int fsopenfd(CFsys*, char*, int);
long fsread(CFid*, void*, long);
long fsreadn(CFid*, void*, long);
+long fspread(CFid*, void*, long, vlong);
+long fspwrite(CFid*, void*, long, vlong);
+vlong fsseek(CFid*, vlong, int);
long fswrite(CFid*, void*, long);
void fsclose(CFid*);
void fsunmount(CFsys*);
blob - c6bbc7dc8cd96755159ac5f4c91686fa135ff2bb
blob + 097f20ad8268a5503f109e838f06a30456090dc2
--- src/lib9pclient/mkfile
+++ src/lib9pclient/mkfile
open.$O\
openfd.$O\
read.$O\
+ seek.$O\
stat.$O\
walk.$O\
write.$O\
blob - /dev/null
blob + 0785c4b489b91bbe1c9b3fd5f26428a63ca96fdd (mode 644)
--- /dev/null
+++ src/lib9pclient/seek.c
+#include <u.h>
+#include <libc.h>
+#include <fcall.h>
+#include <9pclient.h>
+#include "fsimpl.h"
+
+vlong
+fsseek(CFid *fid, vlong n, int whence)
+{
+ Dir *d;
+
+ switch(whence){
+ case 0:
+ qlock(&fid->lk);
+ fid->offset = n;
+ qunlock(&fid->lk);
+ break;
+ case 1:
+ qlock(&fid->lk);
+ n += fid->offset;
+ if(n < 0){
+ qunlock(&fid->lk);
+ werrstr("negative offset");
+ return -1;
+ }
+ fid->offset = n;
+ qunlock(&fid->lk);
+ break;
+ case 2:
+ if((d = fsdirfstat(fid)) == nil)
+ return -1;
+ n += d->length;
+ if(n < 0){
+ werrstr("negative offset");
+ return -1;
+ }
+ qlock(&fid->lk);
+ fid->offset = n;
+ qunlock(&fid->lk);
+ break;
+ default:
+ werrstr("bad whence in fsseek");
+ return -1;
+ }
+ return n;
+}