OpenBSD-4.6/usr.sbin/amd/fsinfo/wr_atab.c
/*
* Copyright (c) 1989 Jan-Simon Pendry
* Copyright (c) 1989 Imperial College of Science, Technology & Medicine
* Copyright (c) 1989, 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. 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.
*
* from: @(#)wr_atab.c 8.1 (Berkeley) 6/6/93
* $Id: wr_atab.c,v 1.4 2003/06/02 23:36:52 millert Exp $
*/
#include "../fsinfo/fsinfo.h"
/*
* Write a sequence of automount mount map entries
*/
static int write_amount_info(af, ap, sk)
FILE *af;
automount *ap;
int sk;
{
int errors = 0;
if (ap->a_mount) {
/*
* A pseudo-directory.
* This can also be a top-level directory, in which
* case the type:=auto is not wanted...
*
* type:=auto;fs:=${map};pref:=whatever/
*/
automount *ap2;
if (strlen(ap->a_name) > sk) {
fprintf(af, "%s type:=auto;fs:=${map};pref:=%s/\n",
ap->a_name + sk, ap->a_name + sk);
}
ITER(ap2, automount, ap->a_mount)
errors += write_amount_info(af, ap2, sk);
} else if (ap->a_mounted) {
/*
* A mounted partition
* type:=link [ link entries ] type:=nfs [ nfs entries ]
*/
dict_data *dd;
dict_ent *de = ap->a_mounted;
int done_type_link = 0;
char *key = ap->a_name + sk;
/*
* Output the map key
*/
fputs(key, af);
/*
* First output any Link locations that would not
* otherwise be correctly mounted. These refer
* to filesystem which are not mounted in the same
* place which the automounter would use.
*/
ITER(dd, dict_data, &de->de_q) {
mount *mp = (mount *) dd->dd_data;
/*
* If the mount point and the exported volname are the
* same then this filesystem will be recognised by
* the restart code - so we don't need to put out a
* special rule for it.
*/
if (mp->m_dk->d_host->h_lochost) {
char amountpt[1024];
compute_automount_point(amountpt, sizeof(amountpt), mp->m_dk->d_host, mp->m_exported->m_volname);
if (strcmp(mp->m_dk->d_mountpt, amountpt) != 0) {
/*
* ap->a_volname is the name of the aliased volume
* mp->m_name is the mount point of the filesystem
* mp->m_volname is the volume name of the filesystems
*/
/*
* Find length of key and volume names
*/
int avlen = strlen(ap->a_volname);
int mnlen = strlen(mp->m_volname);
/*
* Make sure a -type:=link is output once
*/
if (!done_type_link) {
done_type_link = 1;
fputs(" -type:=link", af);
}
/*
* Output a selector for the hostname,
* the device from which to mount and
* where to mount. This will correspond
* to the values output for the fstab.
*/
if (mp->m_dk->d_host->h_lochost)
fprintf(af, " host==%s", mp->m_dk->d_host->h_lochost);
else
fprintf(af, " hostd==%s", mp->m_dk->d_host->h_hostname);
fprintf(af, ";fs:=%s", mp->m_name);
/*
* ... and a sublink if needed
*/
if (mnlen < avlen) {
char *sublink = ap->a_volname + mnlen + 1;
fprintf(af, "/%s", sublink);
}
fputs(" ||", af);
}
}
}
/*
* Next do the NFS locations
*/
if (done_type_link)
fputs(" -", af);
ITER(dd, dict_data, &de->de_q) {
mount *mp = (mount *) dd->dd_data;
int namelen = mp->m_name_len;
int exp_namelen = mp->m_exported->m_name_len;
int volnlen = strlen(ap->a_volname);
int mvolnlen = strlen(mp->m_volname);
fputc(' ', af);
#ifdef notdef
fprintf(af, "\\\n /* avolname = %s, mname = %s,\n * mvolname = %s, mexp_name = %s,\n * mexp_volname = %s\n */\\\n",
ap->a_volname, mp->m_name, mp->m_volname, mp->m_exported->m_name, mp->m_exported->m_volname);
#endif
/*
* Output any selectors
*/
if (mp->m_sel)
fprintf(af, "%s;", mp->m_sel);
/*
* Print host and volname of exported filesystem
*/
fprintf(af, "rhost:=%s",
mp->m_dk->d_host->h_lochost ?
mp->m_dk->d_host->h_lochost :
mp->m_dk->d_host->h_hostname);
fprintf(af, ";rfs:=%s", mp->m_exported->m_volname);
/*
* Now determine whether a sublink is required.
*/
if (exp_namelen < namelen || mvolnlen < volnlen) {
char sublink[1024];
sublink[0] = '\0';
if (exp_namelen < namelen) {
strlcat(sublink,
mp->m_name + exp_namelen + 1,
sizeof(sublink));
if (mvolnlen < volnlen)
strlcat(sublink, "/",
sizeof(sublink));
}
if (mvolnlen < volnlen)
strlcat(sublink,
ap->a_volname + mvolnlen + 1,
sizeof(sublink));
fprintf(af, ";sublink:=%s", sublink);
}
}
fputc('\n', af);
} else if (ap->a_symlink) {
/*
* A specific link.
*
* type:=link;fs:=whatever
*/
fprintf(af, "%s type:=link;fs:=%s\n", ap->a_name + sk, ap->a_symlink);
}
return errors;
}
/*
* Write a single automount configuration file
*/
static int write_amount(q, def)
qelem *q;
char *def;
{
automount *ap;
int errors = 0;
int direct = 0;
/*
* Output all indirect maps
*/
ITER(ap, automount, q) {
FILE *af;
char *p;
/*
* If there is no a_mount node then this is really
* a direct mount, so just keep a count and continue.
* Direct mounts are output into a special file during
* the second pass below.
*/
if (!ap->a_mount) {
direct++;
continue;
}
p = strrchr(ap->a_name, '/');
if (!p) p = ap->a_name;
else p++;
af = pref_open(mount_pref, p, gen_hdr, ap->a_name);
if (af) {
show_new(ap->a_name);
fputs("/defaults ", af);
if (*def)
fprintf(af, "%s;", def);
fputs("type:=nfs\n", af);
errors += write_amount_info(af, ap, strlen(ap->a_name) + 1);
errors += pref_close(af);
}
}
/*
* Output any direct map entries which were found during the
* previous pass over the data.
*/
if (direct) {
FILE *af = pref_open(mount_pref, "direct.map", info_hdr, "direct mount");
if (af) {
show_new("direct mounts");
fputs("/defaults ", af);
if (*def)
fprintf(af, "%s;", def);
fputs("type:=nfs\n", af);
ITER(ap, automount, q)
if (!ap->a_mount)
errors += write_amount_info(af, ap, 1);
errors += pref_close(af);
}
}
return errors;
}
/*
* Write all the needed automount configuration files
*/
write_atab(q)
qelem *q;
{
int errors = 0;
if (mount_pref) {
auto_tree *tp;
show_area_being_processed("write automount", "");
ITER(tp, auto_tree, q)
errors += write_amount(tp->t_mount, tp->t_defaults);
}
return errors;
}