1 /* $OpenBSD: mda_mbox.c,v 1.3 2021/06/14 17:58:15 eric 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/stat.h> 20 21 #include <err.h> 22 #include <errno.h> 23 #include <fcntl.h> 24 #include <paths.h> 25 #include <unistd.h> 26 27 #include "smtpd.h" 28 29 void 30 mda_mbox(struct deliver *deliver) 31 { 32 int ret; 33 char sender[LINE_MAX]; 34 char *envp[] = { 35 "HOME=/", 36 "PATH=" _PATH_DEFPATH, 37 "LOGNAME=root", 38 "USER=root", 39 NULL, 40 }; 41 42 if (deliver->sender.user[0] == '\0' && 43 deliver->sender.domain[0] == '\0') 44 ret = snprintf(sender, sizeof sender, "MAILER-DAEMON"); 45 else 46 ret = snprintf(sender, sizeof sender, "%s@%s", 47 deliver->sender.user, deliver->sender.domain); 48 if (ret < 0 || (size_t)ret >= sizeof sender) 49 errx(EX_TEMPFAIL, "sender address too long"); 50 51 execle(PATH_MAILLOCAL, PATH_MAILLOCAL, "-f", 52 sender, deliver->userinfo.username, (char *)NULL, envp); 53 perror("execl"); 54 _exit(EX_TEMPFAIL); 55 } 56 57 void 58 mda_mbox_init(struct deliver *deliver) 59 { 60 int fd; 61 int ret; 62 char buffer[LINE_MAX]; 63 64 ret = snprintf(buffer, sizeof buffer, "%s/%s", 65 _PATH_MAILDIR, deliver->userinfo.username); 66 if (ret < 0 || (size_t)ret >= sizeof buffer) 67 errx(EX_TEMPFAIL, "mailbox pathname too long"); 68 69 if ((fd = open(buffer, O_CREAT|O_EXCL, 0)) == -1) { 70 if (errno == EEXIST) 71 return; 72 err(EX_TEMPFAIL, "open"); 73 } 74 75 if (fchown(fd, deliver->userinfo.uid, deliver->userinfo.gid) == -1) 76 err(EX_TEMPFAIL, "fchown"); 77 78 if (fchmod(fd, S_IRUSR|S_IWUSR) == -1) 79 err(EX_TEMPFAIL, "fchown"); 80 } 81