1 /*
2 * Copyright (c) 1989 Jan-Simon Pendry
3 * Copyright (c) 1989 Imperial College of Science, Technology & Medicine
4 * Copyright (c) 1989, 1993
5 * The Regents of the University of California. All rights reserved.
6 *
7 * This code is derived from software contributed to Berkeley by
8 * Jan-Simon Pendry at Imperial College, London.
9 *
10 * %sccs.include.redist.c%
11 *
12 * @(#)wr_atab.c 8.1 (Berkeley) 06/06/93
13 *
14 * $Id: wr_atab.c,v 5.2.2.1 1992/02/09 15:09:44 jsp beta $
15 *
16 */
17
18 #include "../fsinfo/fsinfo.h"
19
20 /*
21 * Write a sequence of automount mount map entries
22 */
write_amount_info(af,ap,sk)23 static int write_amount_info(af, ap, sk)
24 FILE *af;
25 automount *ap;
26 int sk;
27 {
28 int errors = 0;
29 if (ap->a_mount) {
30 /*
31 * A pseudo-directory.
32 * This can also be a top-level directory, in which
33 * case the type:=auto is not wanted...
34 *
35 * type:=auto;fs:=${map};pref:=whatever/
36 */
37 automount *ap2;
38 if (strlen(ap->a_name) > sk) {
39 fprintf(af, "%s type:=auto;fs:=${map};pref:=%s/\n",
40 ap->a_name + sk, ap->a_name + sk);
41 }
42 ITER(ap2, automount, ap->a_mount)
43 errors += write_amount_info(af, ap2, sk);
44 } else if (ap->a_mounted) {
45 /*
46 * A mounted partition
47 * type:=link [ link entries ] type:=nfs [ nfs entries ]
48 */
49 dict_data *dd;
50 dict_ent *de = ap->a_mounted;
51 int done_type_link = 0;
52 char *key = ap->a_name + sk;
53
54 /*
55 * Output the map key
56 */
57 fputs(key, af);
58
59 /*
60 * First output any Link locations that would not
61 * otherwise be correctly mounted. These refer
62 * to filesystem which are not mounted in the same
63 * place which the automounter would use.
64 */
65 ITER(dd, dict_data, &de->de_q) {
66 mount *mp = (mount *) dd->dd_data;
67 /*
68 * If the mount point and the exported volname are the
69 * same then this filesystem will be recognised by
70 * the restart code - so we don't need to put out a
71 * special rule for it.
72 */
73 if (mp->m_dk->d_host->h_lochost) {
74 char amountpt[1024];
75 compute_automount_point(amountpt, mp->m_dk->d_host, mp->m_exported->m_volname);
76 if (strcmp(mp->m_dk->d_mountpt, amountpt) != 0) {
77 /*
78 * ap->a_volname is the name of the aliased volume
79 * mp->m_name is the mount point of the filesystem
80 * mp->m_volname is the volume name of the filesystems
81 */
82
83 /*
84 * Find length of key and volume names
85 */
86 int avlen = strlen(ap->a_volname);
87 int mnlen = strlen(mp->m_volname);
88 /*
89 * Make sure a -type:=link is output once
90 */
91 if (!done_type_link) {
92 done_type_link = 1;
93 fputs(" -type:=link", af);
94 }
95 /*
96 * Output a selector for the hostname,
97 * the device from which to mount and
98 * where to mount. This will correspond
99 * to the values output for the fstab.
100 */
101 if (mp->m_dk->d_host->h_lochost)
102 fprintf(af, " host==%s", mp->m_dk->d_host->h_lochost);
103 else
104 fprintf(af, " hostd==%s", mp->m_dk->d_host->h_hostname);
105 fprintf(af, ";fs:=%s", mp->m_name);
106 /*
107 * ... and a sublink if needed
108 */
109 if (mnlen < avlen) {
110 char *sublink = ap->a_volname + mnlen + 1;
111 fprintf(af, "/%s", sublink);
112 }
113 fputs(" ||", af);
114 }
115 }
116 }
117
118 /*
119 * Next do the NFS locations
120 */
121
122 if (done_type_link)
123 fputs(" -", af);
124
125 ITER(dd, dict_data, &de->de_q) {
126 mount *mp = (mount *) dd->dd_data;
127 int namelen = mp->m_name_len;
128 int exp_namelen = mp->m_exported->m_name_len;
129 int volnlen = strlen(ap->a_volname);
130 int mvolnlen = strlen(mp->m_volname);
131 fputc(' ', af);
132 #ifdef notdef
133 fprintf(af, "\\\n /* avolname = %s, mname = %s,\n * mvolname = %s, mexp_name = %s,\n * mexp_volname = %s\n */\\\n",
134 ap->a_volname, mp->m_name, mp->m_volname, mp->m_exported->m_name, mp->m_exported->m_volname);
135 #endif
136 /*
137 * Output any selectors
138 */
139 if (mp->m_sel)
140 fprintf(af, "%s;", mp->m_sel);
141 /*
142 * Print host and volname of exported filesystem
143 */
144 fprintf(af, "rhost:=%s",
145 mp->m_dk->d_host->h_lochost ?
146 mp->m_dk->d_host->h_lochost :
147 mp->m_dk->d_host->h_hostname);
148 fprintf(af, ";rfs:=%s", mp->m_exported->m_volname);
149 /*
150 * Now determine whether a sublink is required.
151 */
152 if (exp_namelen < namelen || mvolnlen < volnlen) {
153 char sublink[1024];
154 sublink[0] = '\0';
155 if (exp_namelen < namelen) {
156 strcat(sublink, mp->m_name + exp_namelen + 1);
157 if (mvolnlen < volnlen)
158 strcat(sublink, "/");
159 }
160 if (mvolnlen < volnlen)
161 strcat(sublink, ap->a_volname + mvolnlen + 1);
162
163 fprintf(af, ";sublink:=%s", sublink);
164 }
165 }
166 fputc('\n', af);
167 } else if (ap->a_symlink) {
168 /*
169 * A specific link.
170 *
171 * type:=link;fs:=whatever
172 */
173 fprintf(af, "%s type:=link;fs:=%s\n", ap->a_name + sk, ap->a_symlink);
174 }
175 return errors;
176 }
177
178 /*
179 * Write a single automount configuration file
180 */
write_amount(q,def)181 static int write_amount(q, def)
182 qelem *q;
183 char *def;
184 {
185 automount *ap;
186 int errors = 0;
187 int direct = 0;
188
189 /*
190 * Output all indirect maps
191 */
192 ITER(ap, automount, q) {
193 FILE *af;
194 char *p;
195 /*
196 * If there is no a_mount node then this is really
197 * a direct mount, so just keep a count and continue.
198 * Direct mounts are output into a special file during
199 * the second pass below.
200 */
201 if (!ap->a_mount) {
202 direct++;
203 continue;
204 }
205 p = strrchr(ap->a_name, '/');
206 if (!p) p = ap->a_name;
207 else p++;
208 af = pref_open(mount_pref, p, gen_hdr, ap->a_name);
209 if (af) {
210 show_new(ap->a_name);
211 fputs("/defaults ", af);
212 if (*def)
213 fprintf(af, "%s;", def);
214 fputs("type:=nfs\n", af);
215 errors += write_amount_info(af, ap, strlen(ap->a_name) + 1);
216 errors += pref_close(af);
217 }
218 }
219
220 /*
221 * Output any direct map entries which were found during the
222 * previous pass over the data.
223 */
224 if (direct) {
225 FILE *af = pref_open(mount_pref, "direct.map", info_hdr, "direct mount");
226 if (af) {
227 show_new("direct mounts");
228 fputs("/defaults ", af);
229 if (*def)
230 fprintf(af, "%s;", def);
231 fputs("type:=nfs\n", af);
232 ITER(ap, automount, q)
233 if (!ap->a_mount)
234 errors += write_amount_info(af, ap, 1);
235 errors += pref_close(af);
236 }
237 }
238
239 return errors;
240 }
241
242 /*
243 * Write all the needed automount configuration files
244 */
write_atab(q)245 write_atab(q)
246 qelem *q;
247 {
248 int errors = 0;
249
250 if (mount_pref) {
251 auto_tree *tp;
252 show_area_being_processed("write automount", "");
253 ITER(tp, auto_tree, q)
254 errors += write_amount(tp->t_mount, tp->t_defaults);
255 }
256
257 return errors;
258 }
259