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/*
* jaZip for Linux (c) 1996 Jarrod A. Smith
*
* Permission to use, copy, modify, and distribute this software and its
* documentation for any purpose is hereby granted without fee, provided that
* the above copyright notice appear in all copies and that both that
* copyright notice and this permission notice appear in supporting
* documentation. No representations are made about the suitability of this
* software for any purpose. It is provided "as is" without express or
* implied warranty.
*/
#include <stdio.h>
#include <mntent.h>
#include <forms.h>
#include <errno.h>
#include <sys/mount.h>
#include <fcntl.h>
#include "jazip.h"
int z_umount (char *dev)
{
FILE *mtab, *newmtab;
struct mntent *mp;
if (!is_mounted(dev)){
sprintf (mesg, "No disks are mounted!");
return (0);
}
seteuid(0);
if (!(newmtab = fdopen (open (LOCK_FILE, O_WRONLY|O_CREAT|O_EXCL, 0666), "w"))) {
sprintf (mesg, "A lock-file exists. umount denied.");
seteuid(getuid());
return (0);
}
if (!(mtab = setmntent (MOUNTED, "r"))) {
sprintf (mesg, "%s : %s", MOUNTED, strerror (errno));
endmntent (newmtab);
unlink (LOCK_FILE);
seteuid(getuid());
return (0);
}
while ((mp = getmntent (mtab))) {
if (!mp->mnt_opts || !mp->mnt_opts[0]) mp->mnt_opts = "defaults";
if (!strcmp (mnt_fsname, mp->mnt_fsname) ||
!strcmp (mnt_dir, mp->mnt_dir)) {
if (umount (mnt_dir) < 0) {
sprintf (mesg, "umount %s : %s", mnt_dir, strerror (errno));
endmntent (mtab);
endmntent (newmtab);
unlink (LOCK_FILE);
seteuid(getuid());
return (0);
} else {
sprintf (mesg, "Unmounted %s", mp->mnt_dir);
}
} else {
addmntent (newmtab, mp);
}
}
endmntent (newmtab);
endmntent (mtab);
unlink (MOUNTED);
link (LOCK_FILE, MOUNTED);
unlink (LOCK_FILE);
seteuid(getuid());
return (1);
}
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