1 /* $OpenBSD: mda_mbox.c,v 1.2 2020/02/03 15:41:22 gilles Exp $ */ 2 3 /* 4 * Copyright (c) 2018 Gilles Chehade <gilles@poolp.org> 5 * 6 * Permission to use, copy, modify, and distribute this software for any 7 * purpose with or without fee is hereby granted, provided that the above 8 * copyright notice and this permission notice appear in all copies. 9 * 10 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 11 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 12 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 13 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 14 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 15 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 16 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 17 */ 18 19 #include <sys/types.h> 20 #include <sys/stat.h> 21 #include <sys/queue.h> 22 #include <sys/tree.h> 23 #include <sys/socket.h> 24 25 #include <err.h> 26 #include <errno.h> 27 #include <event.h> 28 #include <fcntl.h> 29 #include <imsg.h> 30 #include <paths.h> 31 #include <stdio.h> 32 #include <stdlib.h> 33 #include <string.h> 34 #include <sysexits.h> 35 #include <unistd.h> 36 #include <limits.h> 37 38 #include "smtpd.h" 39 40 41 void 42 mda_mbox(struct deliver *deliver) 43 { 44 int ret; 45 char sender[LINE_MAX]; 46 char *envp[] = { 47 "HOME=/", 48 "PATH=" _PATH_DEFPATH, 49 "LOGNAME=root", 50 "USER=root", 51 NULL, 52 }; 53 54 if (deliver->sender.user[0] == '\0' && 55 deliver->sender.domain[0] == '\0') 56 ret = snprintf(sender, sizeof sender, "MAILER-DAEMON"); 57 else 58 ret = snprintf(sender, sizeof sender, "%s@%s", 59 deliver->sender.user, deliver->sender.domain); 60 if (ret < 0 || (size_t)ret >= sizeof sender) 61 errx(EX_TEMPFAIL, "sender address too long"); 62 63 execle(PATH_MAILLOCAL, PATH_MAILLOCAL, "-f", 64 sender, deliver->userinfo.username, (char *)NULL, envp); 65 perror("execl"); 66 _exit(EX_TEMPFAIL); 67 } 68 69 void 70 mda_mbox_init(struct deliver *deliver) 71 { 72 int fd; 73 int ret; 74 char buffer[LINE_MAX]; 75 76 ret = snprintf(buffer, sizeof buffer, "%s/%s", 77 _PATH_MAILDIR, deliver->userinfo.username); 78 if (ret < 0 || (size_t)ret >= sizeof buffer) 79 errx(EX_TEMPFAIL, "mailbox pathname too long"); 80 81 if ((fd = open(buffer, O_CREAT|O_EXCL, 0)) == -1) { 82 if (errno == EEXIST) 83 return; 84 err(EX_TEMPFAIL, "open"); 85 } 86 87 if (fchown(fd, deliver->userinfo.uid, deliver->userinfo.gid) == -1) 88 err(EX_TEMPFAIL, "fchown"); 89 90 if (fchmod(fd, S_IRUSR|S_IWUSR) == -1) 91 err(EX_TEMPFAIL, "fchown"); 92 } 93