1*8a16b7a1SPedro F. Giffuni /*- 2*8a16b7a1SPedro F. Giffuni * SPDX-License-Identifier: BSD-3-Clause 3*8a16b7a1SPedro F. Giffuni * 49b50d902SRodney W. Grimes * Copyright (c) 1980, 1988, 1993 59b50d902SRodney W. Grimes * The Regents of the University of California. All rights reserved. 69b50d902SRodney W. Grimes * 79b50d902SRodney W. Grimes * Redistribution and use in source and binary forms, with or without 89b50d902SRodney W. Grimes * modification, are permitted provided that the following conditions 99b50d902SRodney W. Grimes * are met: 109b50d902SRodney W. Grimes * 1. Redistributions of source code must retain the above copyright 119b50d902SRodney W. Grimes * notice, this list of conditions and the following disclaimer. 129b50d902SRodney W. Grimes * 2. Redistributions in binary form must reproduce the above copyright 139b50d902SRodney W. Grimes * notice, this list of conditions and the following disclaimer in the 149b50d902SRodney W. Grimes * documentation and/or other materials provided with the distribution. 15fbbd9655SWarner Losh * 3. Neither the name of the University nor the names of its contributors 169b50d902SRodney W. Grimes * may be used to endorse or promote products derived from this software 179b50d902SRodney W. Grimes * without specific prior written permission. 189b50d902SRodney W. Grimes * 199b50d902SRodney W. Grimes * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 209b50d902SRodney W. Grimes * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 219b50d902SRodney W. Grimes * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 229b50d902SRodney W. Grimes * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 239b50d902SRodney W. Grimes * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 249b50d902SRodney W. Grimes * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 259b50d902SRodney W. Grimes * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 269b50d902SRodney W. Grimes * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 279b50d902SRodney W. Grimes * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 289b50d902SRodney W. Grimes * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 299b50d902SRodney W. Grimes * SUCH DAMAGE. 309b50d902SRodney W. Grimes */ 319b50d902SRodney W. Grimes 329b50d902SRodney W. Grimes #ifndef lint 33f589c9aaSPhilippe Charnier static const char copyright[] = 349b50d902SRodney W. Grimes "@(#) Copyright (c) 1980, 1988, 1993\n\ 359b50d902SRodney W. Grimes The Regents of the University of California. All rights reserved.\n"; 369b50d902SRodney W. Grimes #endif /* not lint */ 379b50d902SRodney W. Grimes 389b50d902SRodney W. Grimes #ifndef lint 39f589c9aaSPhilippe Charnier #if 0 409b50d902SRodney W. Grimes static char sccsid[] = "@(#)from.c 8.1 (Berkeley) 6/6/93"; 41f589c9aaSPhilippe Charnier #endif 429b50d902SRodney W. Grimes #endif /* not lint */ 43e026a48cSDavid E. O'Brien #include <sys/cdefs.h> 44e026a48cSDavid E. O'Brien __FBSDID("$FreeBSD$"); 459b50d902SRodney W. Grimes 469b50d902SRodney W. Grimes #include <sys/types.h> 479b50d902SRodney W. Grimes #include <ctype.h> 48f589c9aaSPhilippe Charnier #include <err.h> 499b50d902SRodney W. Grimes #include <pwd.h> 509b50d902SRodney W. Grimes #include <stdio.h> 51338fc8ebSJordan K. Hubbard #include <stdlib.h> 529b50d902SRodney W. Grimes #include <paths.h> 53f589c9aaSPhilippe Charnier #include <string.h> 54f589c9aaSPhilippe Charnier #include <unistd.h> 559b50d902SRodney W. Grimes 561e7652ccSEitan Adler static int match(const char *, const char *); 57f1bb2cd2SWarner Losh static void usage(void); 58f589c9aaSPhilippe Charnier 59f589c9aaSPhilippe Charnier int 60c948c058SJuli Mallett main(int argc, char **argv) 619b50d902SRodney W. Grimes { 62c948c058SJuli Mallett FILE *mbox; 639b50d902SRodney W. Grimes struct passwd *pwd; 6482753326SBrian Feldman int ch, count, newline; 65f4ac32deSDavid Malone const char *file; 66f4ac32deSDavid Malone char *sender, *p; 679b50d902SRodney W. Grimes #if MAXPATHLEN > BUFSIZ 689b50d902SRodney W. Grimes char buf[MAXPATHLEN]; 699b50d902SRodney W. Grimes #else 709b50d902SRodney W. Grimes char buf[BUFSIZ]; 719b50d902SRodney W. Grimes #endif 729b50d902SRodney W. Grimes 739b50d902SRodney W. Grimes file = sender = NULL; 7482753326SBrian Feldman count = -1; 7582753326SBrian Feldman while ((ch = getopt(argc, argv, "cf:s:")) != -1) 7682753326SBrian Feldman switch (ch) { 7782753326SBrian Feldman case 'c': 7882753326SBrian Feldman count = 0; 7982753326SBrian Feldman break; 809b50d902SRodney W. Grimes case 'f': 819b50d902SRodney W. Grimes file = optarg; 829b50d902SRodney W. Grimes break; 839b50d902SRodney W. Grimes case 's': 849b50d902SRodney W. Grimes sender = optarg; 859b50d902SRodney W. Grimes for (p = sender; *p; ++p) 869b50d902SRodney W. Grimes *p = tolower(*p); 879b50d902SRodney W. Grimes break; 889b50d902SRodney W. Grimes case '?': 899b50d902SRodney W. Grimes default: 90f589c9aaSPhilippe Charnier usage(); 919b50d902SRodney W. Grimes } 92c948c058SJuli Mallett argc -= optind; 939b50d902SRodney W. Grimes argv += optind; 949b50d902SRodney W. Grimes 95c948c058SJuli Mallett if (file == NULL) { 96c948c058SJuli Mallett if (argc) { 97d2ba10a9SRuslan Ermilov (void)snprintf(buf, sizeof(buf), "%s/%s", _PATH_MAILDIR, *argv); 98338fc8ebSJordan K. Hubbard file = buf; 99338fc8ebSJordan K. Hubbard } else { 100338fc8ebSJordan K. Hubbard if (!(file = getenv("MAIL"))) { 101f589c9aaSPhilippe Charnier if (!(pwd = getpwuid(getuid()))) 102f589c9aaSPhilippe Charnier errx(1, "no password file entry for you"); 1039b50d902SRodney W. Grimes file = pwd->pw_name; 104d2ba10a9SRuslan Ermilov (void)snprintf(buf, sizeof(buf), 105338fc8ebSJordan K. Hubbard "%s/%s", _PATH_MAILDIR, file); 1069b50d902SRodney W. Grimes file = buf; 1079b50d902SRodney W. Grimes } 108338fc8ebSJordan K. Hubbard } 109338fc8ebSJordan K. Hubbard } 11098d04b7cSWolfram Schneider 11198d04b7cSWolfram Schneider /* read from stdin */ 11298d04b7cSWolfram Schneider if (strcmp(file, "-") == 0) { 113c948c058SJuli Mallett mbox = stdin; 11498d04b7cSWolfram Schneider } 115c948c058SJuli Mallett else if ((mbox = fopen(file, "r")) == NULL) { 116f589c9aaSPhilippe Charnier errx(1, "can't read %s", file); 1179b50d902SRodney W. Grimes } 118c948c058SJuli Mallett for (newline = 1; fgets(buf, sizeof(buf), mbox);) { 1199b50d902SRodney W. Grimes if (*buf == '\n') { 1209b50d902SRodney W. Grimes newline = 1; 1219b50d902SRodney W. Grimes continue; 1229b50d902SRodney W. Grimes } 1239b50d902SRodney W. Grimes if (newline && !strncmp(buf, "From ", 5) && 12482753326SBrian Feldman (!sender || match(buf + 5, sender))) { 12582753326SBrian Feldman if (count != -1) 12682753326SBrian Feldman count++; 12782753326SBrian Feldman else 1289b50d902SRodney W. Grimes printf("%s", buf); 12982753326SBrian Feldman } 1309b50d902SRodney W. Grimes newline = 0; 1319b50d902SRodney W. Grimes } 13282753326SBrian Feldman if (count != -1) 13382753326SBrian Feldman printf("There %s %d message%s in your incoming mailbox.\n", 13482753326SBrian Feldman count == 1 ? "is" : "are", count, count == 1 ? "" : "s"); 135c948c058SJuli Mallett fclose(mbox); 1369b50d902SRodney W. Grimes exit(0); 1379b50d902SRodney W. Grimes } 1389b50d902SRodney W. Grimes 139f589c9aaSPhilippe Charnier static void 140c948c058SJuli Mallett usage(void) 141f589c9aaSPhilippe Charnier { 14282753326SBrian Feldman fprintf(stderr, "usage: from [-c] [-f file] [-s sender] [user]\n"); 143f589c9aaSPhilippe Charnier exit(1); 144f589c9aaSPhilippe Charnier } 145f589c9aaSPhilippe Charnier 1461e7652ccSEitan Adler static int 147f4ac32deSDavid Malone match(const char *line, const char *sender) 1489b50d902SRodney W. Grimes { 149f4ac32deSDavid Malone char ch, pch, first; 150f4ac32deSDavid Malone const char *p, *t; 1519b50d902SRodney W. Grimes 1529b50d902SRodney W. Grimes for (first = *sender++;;) { 1539b50d902SRodney W. Grimes if (isspace(ch = *line)) 1549b50d902SRodney W. Grimes return(0); 1559b50d902SRodney W. Grimes ++line; 1569b50d902SRodney W. Grimes ch = tolower(ch); 1579b50d902SRodney W. Grimes if (ch != first) 1589b50d902SRodney W. Grimes continue; 1599b50d902SRodney W. Grimes for (p = sender, t = line;;) { 1609b50d902SRodney W. Grimes if (!(pch = *p++)) 1619b50d902SRodney W. Grimes return(1); 1621e7652ccSEitan Adler ch = tolower(*t); 1631e7652ccSEitan Adler t++; 1649b50d902SRodney W. Grimes if (ch != pch) 1659b50d902SRodney W. Grimes break; 1669b50d902SRodney W. Grimes } 1679b50d902SRodney W. Grimes } 1689b50d902SRodney W. Grimes /* NOTREACHED */ 1699b50d902SRodney W. Grimes } 170