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Added sys_stat, sys_fstat and their libposix glue.

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This commit is contained in:
Bahadir Balban
2008-05-22 11:21:27 +00:00
parent bd8b182f1b
commit 00b47117b0
7 changed files with 248 additions and 4 deletions
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81
tasks/fs0/src/syscalls.c
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@@ -221,6 +221,85 @@ int sys_chdir(l4id_t sender, const char *pathname)
return 0;
}
void fill_kstat(struct vnode *v, struct kstat *ks)
{
ks->vnum = (u64)v->vnum;
ks->mode = v->mode;
ks->links = v->links;
ks->uid = v->owner & 0xFFFF;
ks->gid = (v->owner >> 16) & 0xFFFF;
ks->size = v->size;
ks->blksize = v->sb->blocksize;
ks->atime = v->atime;
ks->mtime = v->mtime;
ks->ctime = v->ctime;
}
int sys_fstat(l4id_t sender, int fd, void *statbuf)
{
struct vnode *v;
struct tcb *task;
unsigned long vnum;
int retval;
/* Get the task */
BUG_ON(!(task = find_task(sender)));
/* Get the vnum */
if (fd < 0 || fd > TASK_FILES_MAX) {
l4_ipc_return(-EINVAL);
return 0;
}
vnum = task->fd[fd];
/* Lookup vnode */
if (!(v = vfs_lookup_byvnum(vfs_root.pivot->sb, vnum))) {
retval = -EINVAL; /* No such vnode */
return 0;
}
/* Fill in the c0-style stat structure */
fill_kstat(v, statbuf);
l4_ipc_return(0);
return 0;
}
/*
* Returns codezero-style stat structure which in turn is
* converted to posix style stat structure via the libposix
* library in userspace.
*/
int sys_stat(l4id_t sender, const char *pathname, void *statbuf)
{
struct vnode *v;
struct tcb *task;
struct pathdata *pdata;
/* Get the task */
BUG_ON(!(task = find_task(sender)));
/* Parse path data */
if (IS_ERR(pdata = pathdata_parse(pathname,
alloca(strlen(pathname) + 1),
task))) {
l4_ipc_return((int)pdata);
return 0;
}
/* Get the vnode */
if (IS_ERR(v = vfs_lookup_bypath(pdata))) {
l4_ipc_return((int)v);
return 0;
}
/* Fill in the c0-style stat structure */
fill_kstat(v, statbuf);
l4_ipc_return(0);
return 0;
}
/*
* Note this can be solely called by the pager and is not the posix read call.
* That call is in the pager. This merely supplies the pages the pager needs
@@ -387,7 +466,7 @@ int sys_readdir(l4id_t sender, int fd, void *buf, int count)
return 0;
}
if (fd < 0 || fd > TASK_OFILES_MAX) {
if (fd < 0 || fd > TASK_FILES_MAX) {
l4_ipc_return(-EBADF);
return 0;
}