diff options
Diffstat (limited to 'usr.sbin/amd/amd/sfs_ops.c')
| -rw-r--r-- | usr.sbin/amd/amd/sfs_ops.c | 208 |
1 files changed, 208 insertions, 0 deletions
diff --git a/usr.sbin/amd/amd/sfs_ops.c b/usr.sbin/amd/amd/sfs_ops.c new file mode 100644 index 0000000..c1b1eba --- /dev/null +++ b/usr.sbin/amd/amd/sfs_ops.c @@ -0,0 +1,208 @@ +/* + * Copyright (c) 1990 Jan-Simon Pendry + * Copyright (c) 1990 Imperial College of Science, Technology & Medicine + * Copyright (c) 1990, 1993 + * 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 acknowledgement: + * 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. + * + * @(#)sfs_ops.c 8.1 (Berkeley) 6/6/93 + * + * $Id: sfs_ops.c,v 5.2.2.1 1992/02/09 15:09:04 jsp beta $ + * + */ + +#include "am.h" + +#if defined(HAS_SFS) || defined(HAS_SFSX) +#define NEED_SFS_MATCH +#define NEED_SFS_UMOUNT +#endif + +/* + * Symbol-link file system + */ + +#ifdef HAS_SFSX +#include <sys/stat.h> +#endif + +#ifdef NEED_SFS_MATCH +/* + * SFS needs a link. + */ +static char *sfs_match(fo) +am_opts *fo; +{ + if (!fo->opt_fs) { + plog(XLOG_USER, "link: no fs specified"); + return 0; + } + + /* + * Bug report (14/12/89) from Jay Plett <jay@princeton.edu> + * If an automount point has the same name as an existing + * link type mount Amd hits a race condition and either hangs + * or causes a symlink loop. + * + * If fs begins with a '/' change the opt_fs & opt_sublink + * fields so that the fs option doesn't end up pointing at + * an existing symlink. + * + * If sublink is nil then set sublink to fs + * else set sublink to fs / sublink + * + * Finally set fs to ".". + */ + if (*fo->opt_fs == '/') { + char *fullpath; + char *link = fo->opt_sublink; + if (link) { + if (*link == '/') + fullpath = strdup(link); + else + fullpath = str3cat((char *)0, fo->opt_fs, "/", link); + } else { + fullpath = strdup(fo->opt_fs); + } + + if (fo->opt_sublink) + free(fo->opt_sublink); + fo->opt_sublink = fullpath; + fo->opt_fs = str3cat(fo->opt_fs, ".", fullpath, ""); + } + + return strdup(fo->opt_fs); +} +#endif + +#ifdef HAS_SFSX +/*ARGUSED*/ +static int sfsx_mount P((am_node *mp)); +static int sfsx_mount(mp) +am_node *mp; +{ + /* + * Check for existence of target. + */ + struct stat stb; + char *ln; + + if (mp->am_link) + ln = mp->am_link; + else /* should never occur */ + ln = mp->am_mnt->mf_mount; + + /* + * Use lstat, not stat, since we don't + * want to know if the ultimate target of + * a symlink chain exists, just the first. + */ + if (lstat(ln, &stb) < 0) + return errno; + + return 0; +} +#endif + +#ifdef HAS_SFS +/*ARGUSED*/ +static int sfs_fmount(mf) +mntfs *mf; +{ + /* + * Wow - this is hard to implement! + */ + + return 0; +} +#endif + +#ifdef NEED_SFS_UMOUNT +/*ARGUSED*/ +static int sfs_fumount(mf) +mntfs *mf; +{ + return 0; +} +#endif + +/* + * Ops structures + */ +#ifdef HAS_SFS +am_ops sfs_ops = { + "link", + sfs_match, + 0, /* sfs_init */ + auto_fmount, + sfs_fmount, + auto_fumount, + sfs_fumount, + efs_lookuppn, + efs_readdir, + 0, /* sfs_readlink */ + 0, /* sfs_mounted */ + 0, /* sfs_umounted */ + find_afs_srvr, +#ifdef FLUSH_KERNEL_NAME_CACHE + FS_UBACKGROUND +#else /* FLUSH_KERNEL_NAME_CACHE */ + 0 +#endif /* FLUSH_KERNEL_NAME_CACHE */ +}; + +#endif /* HAS_SFS */ + +#ifdef HAS_SFSX +struct am_ops sfsx_ops = { + "linkx", + sfs_match, + 0, /* sfsx_init */ + sfsx_mount, + 0, + auto_fumount, + sfs_fumount, + efs_lookuppn, + efs_readdir, + 0, /* sfsx_readlink */ + 0, /* sfsx_mounted */ + 0, /* sfsx_umounted */ + find_afs_srvr, +#ifdef FLUSH_KERNEL_NAME_CACHE + FS_BACKGROUND +#else /* FLUSH_KERNEL_NAME_CACHE */ + FS_MBACKGROUND +#endif /* FLUSH_KERNEL_NAME_CACHE */ +}; + +#endif /* HAS_SFSX */ |
