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/* -*-C++-*-
mntentemu.c++
Copyright (C) 2002 Alan Eldridge
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2, or (at your option)
any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software Foundation,
Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
$Id: mntent_compat.cc,v 1.3 2002/09/08 18:42:20 alane Exp $
2002/09/08 alane@geeksrus.net
*/
#ifndef HAVE_MNTENT_H
#include "config.h"
#include "mntent.h"
#include <string>
// globals (yuck, but easier for debugging)
mntent G_mntent;
int G_mntpos;
int G_mntsize;
bool G_mntfOpen = false;
struct statfs *G_pmntstat = 0;
// map option flags to names
struct optmap {
int fl;
std::string st;
};
static struct optmap omap[] = {
{ MNT_SYNCHRONOUS, "sync" },
{ MNT_NOEXEC, "noexec" },
{ MNT_NOSUID, "nosuid" },
{ MNT_NODEV, "nodev" },
{ MNT_UNION, "union" },
{ MNT_ASYNC, "async" },
{ MNT_NOATIME, "noatime" },
{ MNT_NOCLUSTERR, "noclusterr" },
{ MNT_NOCLUSTERW, "noclusterw" },
{ MNT_NOSYMFOLLOW, "nosymfollow" },
{ MNT_SUIDDIR, "suiddir" },
{ 0, "noop" }
};
// zap everything for clarity
void
mntent::clear()
{
memset(mnt_fsname, 0, sizeof(mnt_fsname));
memset(mnt_dir, 0, sizeof(mnt_dir));
memset(mnt_type, 0, sizeof(mnt_type));
memset(mnt_opts, 0, sizeof(mnt_opts));
mnt_freq = mnt_passno = 0;
}
// fake it from a statfs struct
mntent *
mntent::from_statfs(struct statfs *pst)
{
clear();
strcpy(mnt_fsname, pst->f_mntfromname);
strcpy(mnt_dir, pst->f_mntonname);
strcpy(mnt_type, pst->f_fstypename);
mnt_freq = mnt_passno = 0;
std::string opts;
int fl = pst->f_flags;
opts += (fl & MNT_RDONLY) ? "ro" : "rw";
for (optmap *pmp = omap; pmp->fl != 0; pmp++) {
if ((fl & pmp->fl) != 0) {
opts += (" " + pmp->st);
}
}
strcpy(mnt_opts, opts.c_str());
return this;
}
// "rewind" the mtab file
FILE *
setmntent(const char *, char *)
{
if (!G_mntfOpen) {
G_mntfOpen = true;
}
G_mntpos = 0;
G_mntsize = getmntinfo(&G_pmntstat, MNT_NOWAIT);
return reinterpret_cast<FILE *>(1);
}
// return ptr to opt string if present
char *
hasmntopt(const mntent *pmnt, const char *szopt)
{
std::string opt(szopt);
std::string mntopts(pmnt->mnt_opts);
std::string::size_type pos = mntopts.find(opt);
const char *szret = (pos == std::string::npos) ? "" : pmnt->mnt_opts + pos;
return const_cast<char *>(szret);
}
// get next mntent until all gone, then return 0
struct mntent *
getmntent(FILE *)
{
if (!G_mntfOpen) {
return 0;
} else if (G_mntpos < G_mntsize) {
return G_mntent.from_statfs(G_pmntstat + G_mntpos++);
} else {
G_mntfOpen = false;
return 0;
}
}
// "close" the mtab file
int
endmntent(FILE *)
{
G_mntfOpen = false;
return 0;
}
#endif /* ifndef HAVE_MNTENT_H */
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