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hjfs: fix wstat

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- rename to same name is ok
- only truncate when file size is different
- check for uid/gid *change*, not if it is specified or not
This commit is contained in:
cinap_lenrek 2015-06-15 01:57:54 +02:00
parent 5adf0606f1
commit 13ec55922f
1 changed files with 17 additions and 13 deletions
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30
sys/src/cmd/hjfs/fs2.c
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@ -688,6 +688,8 @@ chanwstat(Chan *ch, Dir *di)
if(willmodify(ch->fs, ch->loc, ch->flags & CHFNOLOCK) < 0)
goto error;
if(*di->name){
FLoc f;
if(!namevalid(di->name) || ch->loc->next == nil)
goto inval;
pb = getbuf(ch->fs->d, ch->loc->next->blk, TDENTRY, 0);
@ -699,9 +701,13 @@ chanwstat(Chan *ch, Dir *di)
if((ch->flags & CHFNOPERM) == 0)
if(!permcheck(ch->fs, d, ch->uid, OWRITE))
goto perm;
rc = findentry(ch->fs, ch->loc->next, pb, di->name, nil, ch->flags & CHFDUMP);
if(rc > 0)
werrstr(Eexists);
rc = findentry(ch->fs, ch->loc->next, pb, di->name, &f, ch->flags & CHFDUMP);
if(rc > 0){
if(f.blk == ch->loc->blk && f.deind == ch->loc->deind)
rc = 0;
else
werrstr(Eexists);
}
if(rc != 0)
goto error;
}
@ -727,17 +733,19 @@ chanwstat(Chan *ch, Dir *di)
goto perm;
if(di->mode != ~0 && !owner)
goto perm;
nuid = NOUID;
ngid = NOUID;
nuid = d->uid;
ngid = d->gid;
if(*di->uid != 0 && name2uid(ch->fs, di->uid, &nuid) < 0)
goto inval;
if(*di->gid != 0 && name2uid(ch->fs, di->gid, &ngid) < 0)
goto inval;
if(nuid != NOUID && (ch->fs->flags & FSCHOWN) == 0)
goto inval;
if((nuid != NOUID || ngid != NOUID) && !owner)
if(nuid != d->uid && (ch->fs->flags & FSCHOWN) == 0)
goto perm;
if(di->length != ~0 && !isdir){
if((nuid != d->uid || ngid != d->gid) && !owner)
goto perm;
d->uid = nuid;
d->gid = ngid;
if(di->length != ~0 && di->length != d->size && !isdir){
trunc(ch->fs, ch->loc, b, di->length);
modified(ch, d);
}
@ -751,10 +759,6 @@ chanwstat(Chan *ch, Dir *di)
memset(d->name, 0, NAMELEN);
strcpy(d->name, di->name);
}
if(nuid != NOUID)
d->uid = nuid;
if(ngid != NOUID)
d->gid = ngid;
b->op |= BDELWRI;
if(pb != nil)
putbuf(pb);