Annotation of src/usr.bin/from/from.c, Revision 1.1
1.1 ! deraadt 1: /* $NetBSD: from.c,v 1.6 1995/09/01 01:39:10 jtc Exp $ */
! 2:
! 3: /*
! 4: * Copyright (c) 1980, 1988, 1993
! 5: * The Regents of the University of California. All rights reserved.
! 6: *
! 7: * Redistribution and use in source and binary forms, with or without
! 8: * modification, are permitted provided that the following conditions
! 9: * are met:
! 10: * 1. Redistributions of source code must retain the above copyright
! 11: * notice, this list of conditions and the following disclaimer.
! 12: * 2. Redistributions in binary form must reproduce the above copyright
! 13: * notice, this list of conditions and the following disclaimer in the
! 14: * documentation and/or other materials provided with the distribution.
! 15: * 3. All advertising materials mentioning features or use of this software
! 16: * must display the following acknowledgement:
! 17: * This product includes software developed by the University of
! 18: * California, Berkeley and its contributors.
! 19: * 4. Neither the name of the University nor the names of its contributors
! 20: * may be used to endorse or promote products derived from this software
! 21: * without specific prior written permission.
! 22: *
! 23: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
! 24: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
! 25: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
! 26: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
! 27: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
! 28: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
! 29: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
! 30: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
! 31: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
! 32: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
! 33: * SUCH DAMAGE.
! 34: */
! 35:
! 36: #ifndef lint
! 37: static char copyright[] =
! 38: "@(#) Copyright (c) 1980, 1988, 1993\n\
! 39: The Regents of the University of California. All rights reserved.\n";
! 40: #endif /* not lint */
! 41:
! 42: #ifndef lint
! 43: #if 0
! 44: static char sccsid[] = "@(#)from.c 8.1 (Berkeley) 6/6/93";
! 45: #endif
! 46: static char rcsid[] = "$NetBSD: from.c,v 1.6 1995/09/01 01:39:10 jtc Exp $";
! 47: #endif /* not lint */
! 48:
! 49: #include <sys/types.h>
! 50: #include <ctype.h>
! 51: #include <pwd.h>
! 52: #include <stdio.h>
! 53: #include <stdlib.h>
! 54: #include <unistd.h>
! 55: #include <paths.h>
! 56:
! 57: main(argc, argv)
! 58: int argc;
! 59: char **argv;
! 60: {
! 61: extern char *optarg;
! 62: extern int optind;
! 63: struct passwd *pwd;
! 64: int ch, newline;
! 65: char *file, *sender, *p;
! 66: #if MAXPATHLEN > BUFSIZ
! 67: char buf[MAXPATHLEN];
! 68: #else
! 69: char buf[BUFSIZ];
! 70: #endif
! 71:
! 72: file = sender = NULL;
! 73: while ((ch = getopt(argc, argv, "f:s:")) != EOF)
! 74: switch((char)ch) {
! 75: case 'f':
! 76: file = optarg;
! 77: break;
! 78: case 's':
! 79: sender = optarg;
! 80: for (p = sender; *p; ++p)
! 81: if (isupper(*p))
! 82: *p = tolower(*p);
! 83: break;
! 84: case '?':
! 85: default:
! 86: fprintf(stderr, "usage: from [-f file] [-s sender] [user]\n");
! 87: exit(1);
! 88: }
! 89: argv += optind;
! 90:
! 91: /*
! 92: * We find the mailbox by:
! 93: * 1 -f flag
! 94: * 2 user
! 95: * 2 MAIL environment variable
! 96: * 3 _PATH_MAILDIR/file
! 97: */
! 98: if (!file) {
! 99: if (!(file = *argv)) {
! 100: if (!(file = getenv("MAIL"))) {
! 101: if (!(pwd = getpwuid(getuid()))) {
! 102: (void)fprintf(stderr,
! 103: "from: no password file entry for you.\n");
! 104: exit(1);
! 105: }
! 106: if (file = getenv("USER")) {
! 107: (void)sprintf(buf, "%s/%s",
! 108: _PATH_MAILDIR, file);
! 109: file = buf;
! 110: } else
! 111: (void)sprintf(file = buf, "%s/%s",
! 112: _PATH_MAILDIR, pwd->pw_name);
! 113: }
! 114: } else {
! 115: (void)sprintf(buf, "%s/%s", _PATH_MAILDIR, file);
! 116: file = buf;
! 117: }
! 118: }
! 119: if (!freopen(file, "r", stdin)) {
! 120: (void)fprintf(stderr, "from: can't read %s.\n", file);
! 121: exit(1);
! 122: }
! 123: for (newline = 1; fgets(buf, sizeof(buf), stdin);) {
! 124: if (*buf == '\n') {
! 125: newline = 1;
! 126: continue;
! 127: }
! 128: if (newline && !strncmp(buf, "From ", 5) &&
! 129: (!sender || match(buf + 5, sender)))
! 130: printf("%s", buf);
! 131: newline = 0;
! 132: }
! 133: exit(0);
! 134: }
! 135:
! 136: match(line, sender)
! 137: register char *line, *sender;
! 138: {
! 139: register char ch, pch, first, *p, *t;
! 140:
! 141: for (first = *sender++;;) {
! 142: if (isspace(ch = *line))
! 143: return(0);
! 144: ++line;
! 145: if (isupper(ch))
! 146: ch = tolower(ch);
! 147: if (ch != first)
! 148: continue;
! 149: for (p = sender, t = line;;) {
! 150: if (!(pch = *p++))
! 151: return(1);
! 152: if (isupper(ch = *t++))
! 153: ch = tolower(ch);
! 154: if (ch != pch)
! 155: break;
! 156: }
! 157: }
! 158: /* NOTREACHED */
! 159: }
![[BACK]](/icons/back.gif){kind=icon}
Return to from.c CVS log ![[TXT]](/icons/text.gif){kind=icon}
![[DIR]](/icons/dir.gif){kind=icon}
Up to [local] / src / usr.bin / from