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/***********************************************************************
* *
* This software is part of the ast package *
* Copyright (c) 1985-2009 AT&T Intellectual Property *
* and is licensed under the *
* Common Public License, Version 1.0 *
* by AT&T Intellectual Property *
* *
* A copy of the License is available at *
* http://www.opensource.org/licenses/cpl1.0.txt *
* (with md5 checksum 059e8cd6165cb4c31e351f2b69388fd9) *
* *
* Information and Software Systems Research *
* AT&T Research *
* Florham Park NJ *
* *
* Glenn Fowler <gsf@research.att.com> *
* David Korn <dgk@research.att.com> *
* Phong Vo <kpv@research.att.com> *
* *
***********************************************************************/
#pragma prototyped
/*
* Glenn Fowler
* AT&T Bell Laboratories
*
* return fs type string given stat
*/
#include <ast.h>
#include <ls.h>
#include <mnt.h>
#include "FEATURE/fs"
#if _str_st_fstype
char*
fmtfs(struct stat* st)
{
return st->st_fstype;
}
#else
#include <cdt.h>
typedef struct Id_s
{
Dtlink_t link;
dev_t id;
char name[1];
} Id_t;
char*
fmtfs(struct stat* st)
{
register Id_t* ip;
register void* mp;
register Mnt_t* mnt;
register char* s;
struct stat rt;
char* buf;
static Dt_t* dict;
static Dtdisc_t disc;
if (!dict)
{
disc.key = offsetof(Id_t, id);
disc.size = sizeof(dev_t);
dict = dtopen(&disc, Dthash);
}
else if (ip = (Id_t*)dtmatch(dict, &st->st_dev))
return ip->name;
s = FS_default;
if (mp = mntopen(NiL, "r"))
{
while ((mnt = mntread(mp)) && (stat(mnt->dir, &rt) || rt.st_dev != st->st_dev));
if (mnt && mnt->type)
s = mnt->type;
}
if (!dict || !(ip = newof(0, Id_t, 1, strlen(s))))
{
if (!mp)
return s;
buf = fmtbuf(strlen(s) + 1);
strcpy(buf, s);
mntclose(mp);
return buf;
}
strcpy(ip->name, s);
if (mp)
mntclose(mp);
dtinsert(dict, ip);
return ip->name;
}
#endif
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