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