1 /*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License, Version 1.0 only
6 * (the "License"). You may not use this file except in compliance
7 * with the License.
8 *
9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10 * or http://www.opensolaris.org/os/licensing.
11 * See the License for the specific language governing permissions
12 * and limitations under the License.
13 *
14 * When distributing Covered Code, include this CDDL HEADER in each
15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16 * If applicable, add the following below this CDDL HEADER, with the
17 * fields enclosed by brackets "[]" replaced with your own identifying
18 * information: Portions Copyright [yyyy] [name of copyright owner]
19 *
20 * CDDL HEADER END
21 */
22 /*
23 * Copyright 2005 Sun Microsystems, Inc. All rights reserved.
24 * Use is subject to license terms.
25 */
26
27 /* Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */
28
29 #include "mail.h"
30 /*
31 * NAME
32 * sendlist - send copy to specified users
33 *
34 * SYNOPSIS
35 * int sendlist(reciplist *list, int letnum, int level)
36 *
37 * DESCRIPTION
38 * sendlist() will traverse the current recipient list and
39 * send a copy of the given letter to each user specified,
40 * invoking send() to do the sending. It returns
41 * 1 if the sending fails, 0 otherwise.
42 */
43
44
45 /*
46 * mailx and mailtool read the SENDMAIL from an environment, since few
47 * people use /bin/mail as their user agent and since /bin/mail is often
48 * called as root or made setuid it's safer to leave this hardwired.
49 */
50
51 static char *sendmail_prog = SENDMAIL;
52
53 static void notifybiff(char *);
54
55 int
sendlist(reciplist * list,int letnum,int level)56 sendlist(reciplist *list, int letnum, int level)
57 {
58 recip *to;
59 int rc = 0;
60 FILE *fp;
61 int nargs = 4; /* "sendmail", "-oi", "--", .. NULL */
62 char **argv;
63 char **p;
64
65 /* Deliver mail directly to a mailbox */
66 if (deliverflag) {
67 /*
68 * Note failure to deliver to any one of the recipients
69 * should be considered a failure, so that the user
70 * get's an indication of that failure.
71 */
72 for (to = &(list->recip_list); to; to = to->next) {
73 if (to->name)
74 if (!send_mbox(to->name, letnum))
75 rc = 1;
76 }
77 return (rc);
78 }
79
80 /*
81 * build argv list, allowing for arbitrarily long deliver lists
82 * and then hand the message off to sendmail
83 */
84
85 if (!ismail)
86 nargs += 2; /* for "-f", "Rpath" */
87
88 for (to = &(list->recip_list); to; to = to->next)
89 if (to->name)
90 nargs++;
91
92 argv = malloc(nargs * sizeof (char *));
93
94 if (argv == NULL)
95 return (1);
96
97 p = argv;
98
99 *p++ = sendmail_prog;
100
101 /* If we're rmail add "-f", "Rpath" to the the command line */
102 if (!ismail) {
103 *p++ = "-f";
104 *p++ = Rpath;
105 }
106
107 *p++ = "-oi";
108 *p++ = "--"; /* extra protection: end of argument list */
109
110 for (to = &(list->recip_list); to; to = to->next)
111 if (to->name)
112 *p++ = to->name;
113
114 *p = NULL;
115
116 fp = popenvp(sendmail_prog, argv, "w", 0);
117
118 free(argv);
119
120 if (fp == NULL)
121 return (1);
122
123 copylet(letnum, fp, ORDINARY);
124 rc = pclosevp(fp);
125 if (!rc)
126 return (0);
127 else
128 return (1);
129 }
130
131 /*
132 * send_mbox(user, letnum) Sends the letter specified by letnum to the
133 * "user"'s mailbox. It returns 1 if the sending fails;
134 * 0 on success.
135 */
136
137
138
139 int
send_mbox(char * mbox,int letnum)140 send_mbox(char *mbox, int letnum)
141 {
142 char file[PATH_MAX];
143 char biffmsg[PATH_MAX];
144 int mbfd;
145 FILE *malf;
146 int rc;
147 uid_t useruid, saved_uid;
148 void (*istat)(), (*qstat)(), (*hstat)();
149
150 if (!islocal(mbox, &useruid))
151 return (1);
152 (void) strlcpy(file, maildir, sizeof (file));
153 if (strlcat(file, mbox, sizeof (file)) >= sizeof (file)) {
154 rc = FALSE;
155 goto done;
156 }
157
158 /*
159 * We need to setgid and seteuid here since the users's mail box
160 * might be NFS mounted and since root can't write across NFS.
161 * Note this won't work with Secure NFS/RPC's. Since delivering to
162 * NFS mounted directories isn't really supported that's OK for now.
163 */
164 setgid(mailgrp);
165 saved_uid = geteuid();
166 seteuid(useruid);
167 lock(mbox);
168
169 /* ignore signals */
170 istat = signal(SIGINT, SIG_IGN);
171 qstat = signal(SIGQUIT, SIG_IGN);
172 hstat = signal(SIGHUP, SIG_IGN);
173 /* now access mail box */
174 mbfd = accessmf(file);
175 if (mbfd == -1) { /* mail box access failed, bail out */
176 unlock();
177 rc = FALSE;
178 sav_errno = EACCES;
179 goto done;
180 } else {
181 /* mail box is ok, now do append */
182 if ((malf = fdopen(mbfd, "a")) != NULL) {
183 (void) snprintf(biffmsg, sizeof (biffmsg),
184 "%s@%d\n", mbox, ftell(malf));
185 rc = copylet(letnum, malf, ORDINARY);
186 fclose(malf);
187 }
188 }
189
190 if (rc == FALSE)
191 fprintf(stderr, "%s: Cannot append to %s\n", program, file);
192 else
193 notifybiff(biffmsg);
194
195 done:
196 /* restore signal */
197 (void) signal(SIGINT, istat);
198 (void) signal(SIGQUIT, qstat);
199 (void) signal(SIGHUP, hstat);
200 unlock();
201 seteuid(saved_uid);
202 return (rc);
203 }
204
205 #include <sys/socket.h>
206 #include <netinet/in.h>
207
208 static void
notifybiff(char * msg)209 notifybiff(char *msg)
210 {
211 static struct sockaddr_in addr;
212 static int f = -1;
213
214 if (addr.sin_family == 0) {
215 addr.sin_family = AF_INET;
216 addr.sin_addr.s_addr = INADDR_LOOPBACK;
217 addr.sin_port = htons(IPPORT_BIFFUDP);
218 }
219 if (f < 0)
220 f = socket(AF_INET, SOCK_DGRAM, 0);
221 sendto(f, msg, strlen(msg)+1, 0, (struct sockaddr *)&addr,
222 sizeof (addr));
223 }
224