Annotation of src/usr.bin/from/from.c, Revision 1.18
1.18 ! millert 1: /* $OpenBSD: from.c,v 1.17 2015/01/16 06:40:07 deraadt Exp $ */
1.1 deraadt 2: /* $NetBSD: from.c,v 1.6 1995/09/01 01:39:10 jtc Exp $ */
3:
4: /*
5: * Copyright (c) 1980, 1988, 1993
6: * The Regents of the University of California. All rights reserved.
7: *
8: * Redistribution and use in source and binary forms, with or without
9: * modification, are permitted provided that the following conditions
10: * are met:
11: * 1. Redistributions of source code must retain the above copyright
12: * notice, this list of conditions and the following disclaimer.
13: * 2. Redistributions in binary form must reproduce the above copyright
14: * notice, this list of conditions and the following disclaimer in the
15: * documentation and/or other materials provided with the distribution.
1.9 millert 16: * 3. Neither the name of the University nor the names of its contributors
1.1 deraadt 17: * may be used to endorse or promote products derived from this software
18: * without specific prior written permission.
19: *
20: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
21: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
24: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30: * SUCH DAMAGE.
31: */
32:
33: #include <sys/types.h>
34: #include <ctype.h>
35: #include <pwd.h>
36: #include <stdio.h>
37: #include <stdlib.h>
38: #include <unistd.h>
39: #include <paths.h>
1.7 deraadt 40: #include <string.h>
1.4 mickey 41: #include <err.h>
1.1 deraadt 42:
1.7 deraadt 43: int match(char *, char *);
1.18 ! millert 44: FILE *open_mbox(const char *file, const char *user);
1.7 deraadt 45:
46: int
1.10 deraadt 47: main(int argc, char *argv[])
1.1 deraadt 48: {
49: int ch, newline;
1.18 ! millert 50: char *file, *line, *sender, *p;
! 51: size_t linesize = 0;
! 52: ssize_t linelen;
! 53: FILE *fp;
1.1 deraadt 54:
1.18 ! millert 55: file = line = sender = NULL;
! 56: while ((ch = getopt(argc, argv, "f:s:")) != -1) {
1.16 okan 57: switch(ch) {
1.1 deraadt 58: case 'f':
59: file = optarg;
60: break;
61: case 's':
62: sender = optarg;
63: for (p = sender; *p; ++p)
1.15 deraadt 64: if (isupper((unsigned char)*p))
65: *p = tolower((unsigned char)*p);
1.1 deraadt 66: break;
67: default:
1.13 jmc 68: fprintf(stderr,
69: "usage: from [-f file] [-s sender] [user]\n");
1.18 ! millert 70: exit(EXIT_FAILURE);
1.1 deraadt 71: }
1.18 ! millert 72: }
1.1 deraadt 73: argv += optind;
74:
1.18 ! millert 75: if ((fp = open_mbox(file, *argv)) == NULL)
! 76: err(1, "%s", file);
! 77: for (newline = 1; (linelen = getline(&line, &linesize, fp)) != -1;) {
! 78: if (*line == '\n') {
! 79: newline = 1;
! 80: continue;
! 81: }
! 82: if (newline && !strncmp(line, "From ", 5) &&
! 83: (!sender || match(line + 5, sender)))
! 84: printf("%s", line);
! 85: newline = 0;
! 86: }
! 87: free(line);
! 88: exit(EXIT_SUCCESS);
! 89: }
! 90:
! 91: FILE *
! 92: open_mbox(const char *file, const char *user)
! 93: {
! 94: struct passwd *pwd;
! 95: char *buf = NULL;
! 96: FILE *fp;
! 97:
1.1 deraadt 98: /*
99: * We find the mailbox by:
100: * 1 -f flag
1.18 ! millert 101: * 2 _PATH_MAILDIR/user (from argv)
1.1 deraadt 102: * 2 MAIL environment variable
1.18 ! millert 103: * 3 _PATH_MAILDIR/user (from environment or passwd db)
1.1 deraadt 104: */
1.18 ! millert 105: if (file == NULL) {
! 106: if (user == NULL) {
! 107: if ((file = getenv("MAIL")) == NULL) {
! 108: if ((user = getenv("LOGNAME")) == NULL &&
! 109: (user = getenv("USER")) == NULL) {
! 110: if (!(pwd = getpwuid(getuid())))
! 111: errx(1, "no password file "
! 112: "entry for you");
! 113: user = pwd->pw_name;
! 114: }
1.1 deraadt 115: }
1.18 ! millert 116: }
! 117: if (file == NULL) {
! 118: if (asprintf(&buf, "%s/%s", _PATH_MAILDIR, user) == -1)
! 119: err(1, NULL);
1.1 deraadt 120: file = buf;
121: }
122: }
1.18 ! millert 123: fp = fopen(file, "r");
! 124: free(buf);
! 125: return(fp);
1.1 deraadt 126: }
127:
1.7 deraadt 128: int
1.10 deraadt 129: match(char *line, char *sender)
1.1 deraadt 130: {
1.8 mpech 131: char ch, pch, first, *p, *t;
1.1 deraadt 132:
133: for (first = *sender++;;) {
1.15 deraadt 134: if (isspace((unsigned char)(ch = *line)))
1.1 deraadt 135: return(0);
136: ++line;
1.15 deraadt 137: if (isupper((unsigned char)ch))
138: ch = tolower((unsigned char)ch);
1.1 deraadt 139: if (ch != first)
140: continue;
141: for (p = sender, t = line;;) {
142: if (!(pch = *p++))
143: return(1);
1.15 deraadt 144: if (isupper((unsigned char)(ch = *t++)))
145: ch = tolower((unsigned char)ch);
1.1 deraadt 146: if (ch != pch)
147: break;
148: }
149: }
150: /* NOTREACHED */
151: }
![[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