152 lines
4.4 KiB
C
152 lines
4.4 KiB
C
/* $NetBSD: info_union.c,v 1.1.1.4 2001/05/13 17:50:14 veego Exp $ */
|
|
|
|
/*
|
|
* Copyright (c) 1997-2001 Erez Zadok
|
|
* Copyright (c) 1990 Jan-Simon Pendry
|
|
* Copyright (c) 1990 Imperial College of Science, Technology & Medicine
|
|
* Copyright (c) 1990 The Regents of the University of California.
|
|
* All rights reserved.
|
|
*
|
|
* This code is derived from software contributed to Berkeley by
|
|
* Jan-Simon Pendry at Imperial College, London.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
* 3. All advertising materials mentioning features or use of this software
|
|
* must display the following acknowledgment:
|
|
* This product includes software developed by the University of
|
|
* California, Berkeley and its contributors.
|
|
* 4. Neither the name of the University nor the names of its contributors
|
|
* may be used to endorse or promote products derived from this software
|
|
* without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
* SUCH DAMAGE.
|
|
*
|
|
* %W% (Berkeley) %G%
|
|
*
|
|
* Id: info_union.c,v 1.3.2.1 2001/01/10 03:23:07 ezk Exp
|
|
*
|
|
*/
|
|
|
|
/*
|
|
* Get info from the system namespace
|
|
*
|
|
* NOTE: Cannot handle reads back through the automounter.
|
|
* THIS WILL CAUSE A DEADLOCK!
|
|
*/
|
|
|
|
#ifdef HAVE_CONFIG_H
|
|
# include <config.h>
|
|
#endif /* HAVE_CONFIG_H */
|
|
#include <am_defs.h>
|
|
#include <amd.h>
|
|
|
|
#define UNION_PREFIX "union:"
|
|
#define UNION_PREFLEN 6
|
|
|
|
/* forward declarations */
|
|
int union_init(mnt_map *m, char *map, time_t *tp);
|
|
int union_search(mnt_map *m, char *map, char *key, char **pval, time_t *tp);
|
|
int union_reload(mnt_map *m, char *map, void (*fn) (mnt_map *, char *, char *));
|
|
|
|
|
|
/*
|
|
* No way to probe - check the map name begins with "union:"
|
|
*/
|
|
int
|
|
union_init(mnt_map *m, char *map, time_t *tp)
|
|
{
|
|
*tp = 0;
|
|
return NSTREQ(map, UNION_PREFIX, UNION_PREFLEN) ? 0 : ENOENT;
|
|
}
|
|
|
|
|
|
int
|
|
union_search(mnt_map *m, char *map, char *key, char **pval, time_t *tp)
|
|
{
|
|
char *mapd = strdup(map + UNION_PREFLEN);
|
|
char **v = strsplit(mapd, ':', '\"');
|
|
char **p;
|
|
|
|
for (p = v; p[1]; p++) ;
|
|
*pval = xmalloc(strlen(*p) + 5);
|
|
sprintf(*pval, "fs:=%s", *p);
|
|
XFREE(mapd);
|
|
XFREE(v);
|
|
return 0;
|
|
}
|
|
|
|
|
|
int
|
|
union_reload(mnt_map *m, char *map, void (*fn) (mnt_map *, char *, char *))
|
|
{
|
|
char *mapd = strdup(map + UNION_PREFLEN);
|
|
char **v = strsplit(mapd, ':', '\"');
|
|
char **dir;
|
|
|
|
/*
|
|
* Add fake /defaults entry
|
|
*/
|
|
(*fn) (m, strdup("/defaults"), strdup("type:=link;opts:=nounmount;sublink:=${key}"));
|
|
|
|
for (dir = v; *dir; dir++) {
|
|
int dlen;
|
|
struct dirent *dp;
|
|
|
|
DIR *dirp = opendir(*dir);
|
|
if (!dirp) {
|
|
plog(XLOG_USER, "Cannot read directory %s: %m", *dir);
|
|
continue;
|
|
}
|
|
dlen = strlen(*dir);
|
|
|
|
#ifdef DEBUG
|
|
dlog("Reading directory %s...", *dir);
|
|
#endif /* DEBUG */
|
|
while ((dp = readdir(dirp))) {
|
|
char *val, *dpname = &dp->d_name[0];
|
|
if (dpname[0] == '.' &&
|
|
(dpname[1] == '\0' ||
|
|
(dpname[1] == '.' && dpname[2] == '\0')))
|
|
continue;
|
|
|
|
#ifdef DEBUG
|
|
dlog("... gives %s", dp->d_name);
|
|
#endif /* DEBUG */
|
|
val = xmalloc(dlen + 5);
|
|
sprintf(val, "fs:=%s", *dir);
|
|
(*fn) (m, strdup(dp->d_name), val);
|
|
}
|
|
closedir(dirp);
|
|
}
|
|
|
|
/*
|
|
* Add wildcard entry
|
|
*/
|
|
{
|
|
char *val = xmalloc(strlen(dir[-1]) + 5);
|
|
|
|
sprintf(val, "fs:=%s", dir[-1]);
|
|
(*fn) (m, strdup("*"), val);
|
|
}
|
|
XFREE(mapd);
|
|
XFREE(v);
|
|
return 0;
|
|
}
|