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/*
* lockfile.c:
*
* Copyright (c) 2008 James McKenzie <james@fishsoup.dhs.org>,
* All rights reserved.
*
*/
static char rcsid[] = "$Id$";
/*
* $Log$
* Revision 1.2 2008/02/15 16:48:56 james
* *** empty log message ***
*
* Revision 1.1 2008/02/15 15:09:17 james
* *** empty log message ***
*
*/
#define LOCK_ASCII
#undef LOCK_BINARY
Filelist *filelist_new(void)
{
}
static int
chown_uucp (fd)
int fd;
{
static int uuid = -1, ugid;
struct passwd *pw;
if (uuid < 0)
{
if (pw = getpwnam ("uucp"))
{
uuid = pw->pw_uid;
ugid = pw->pw_gid;
}
else
{
return -1;
}
}
return fchown (fd, uuid, ugid);
}
int
lockfile_make
{
char buf[1024], tmpfn[1024];
char *ptr;
int fd;
int i;
strcpy (tmpfn, name);
ptr = rindex (tmpfn, '/');
if (!ptr)
return -1;
ptr++;
ptr += sprintf (ptr, "LTMP.%d", getpid ());
*ptr = 0;
i = sprintf (buf, "%10d\n", getpid ());
fd = open (tmpfn, O_WRONLY | O_CREAT | O_TRUNC, 0444);
if (fd < 0)
{
unlink (tmpfn);
return -1;
}
write (fd, buf, i);
fchmod (fd, 044);
if (chown_uucp (fd))
{
close (fd);
unlink (tmpfn);
return -1;
}
close (fd);
if (link (tmpfn, name) < 0)
{
unlink (tmpfn);
return -1;
}
unlink (tmpfn);
return 0;
}
void
lockfile_add_name_from_path (File_list *fl,char *ptr)
{
printf ("lock by file %s\n", ptr);
}
void
lockfile_add_name_from_dev (File_list *fl,dev_t dev)
{
printf ("lock by dev %x\n", dev);
}
void lockfile_check_dir_for_dev(File_list *fl,char *dir,dev_t dev)
{
char buf[1024];
struct stat ent_stat;
struct dirent *de;
DIR *d;
for (d = opendir (DEV); (de = readdir (d));)
{
strcpy (buf, DEV);
strcat (buf, de->d_name);
if (stat (buf, &ent_stat))
continue;
if (!S_ISCHR (ent_stat.st_mode))
continue;
if (ent_stat.st_rdev != dev)
continue;
lockfile_add_name_from_path (fl,buf);
}
closedir (d);
}
File_list *
construct_possible_lock_files (char *device)
{
struct stat dev_stat;
File_list *ret=NULL;
if (stat (device, &dev_stat))
return ret;
if (!S_ISCHR (dev_stat.st_mode))
return ret;
ret=filelist_new();
lockfile_add_name_from_dev (ret,dev_stat.st_rdev);
lockfile_add_name_from_path (ret,device);
lockfile_check_dir_for_dev(ret,"/dev/",dev_stat.st_rdev);
lockfile_check_dir_for_dev(ret,"/dev/usb/",dev_stat.st_rdev);
lockfile_check_dir_for_dev(ret,"/dev/tts/",dev_stat.st_rdev);
return ret;
}
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