1 /*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License, Version 1.0 only
6 * (the "License"). You may not use this file except in compliance
7 * with the License.
8 *
9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10 * or http://www.opensolaris.org/os/licensing.
11 * See the License for the specific language governing permissions
12 * and limitations under the License.
13 *
14 * When distributing Covered Code, include this CDDL HEADER in each
15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16 * If applicable, add the following below this CDDL HEADER, with the
17 * fields enclosed by brackets "[]" replaced with your own identifying
18 * information: Portions Copyright [yyyy] [name of copyright owner]
19 *
20 * CDDL HEADER END
21 */
22 /* Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */
23 /* All Rights Reserved */
24
25
26 #include "mail.h"
27 /*
28 * isheader(lp, ctf) - check if lp is header line and return type
29 * lp -> pointer to line
30 * ctfp -> continuation flag (should be FALSE the first time
31 * isheader() is called on a message. isheader() sets
32 * it for the remaining calls to that message)
33 * returns
34 * FALSE -> not header line
35 * H_* -> type of header line found.
36 */
37 int
isheader(char * lp,int * ctfp)38 isheader(char *lp, int *ctfp)
39 {
40 char *p, *q;
41 int i;
42
43 p = lp;
44 while ((*p) && (*p != '\n') && (isspace(*p))) {
45 p++;
46 }
47 if ((*p == '\0') || (*p == '\n')) {
48 /* blank line */
49 return (FALSE);
50 }
51
52 if ((*ctfp) && ((*lp == ' ') || (*lp == '\t'))) {
53 return (H_CONT);
54 }
55
56 *ctfp = FALSE;
57 for (i = 1; i < H_CONT; i++) {
58 if (!isit(lp, i)) {
59 continue;
60 }
61 if ((i == H_FROM) || (i == H_FROM1)) {
62 /*
63 * Should NEVER get 'From ' or '>From ' line on stdin
64 * if invoked as mail (rather than rmail) since
65 * 'From ' and/or '>From ' lines are generated by
66 * program itself. Therefore, if it DOES match and
67 * ismail == TRUE, it must be part of the content.
68 */
69 if (sending && ismail && !deliverflag) {
70 return (FALSE);
71 }
72 }
73 *ctfp = TRUE;
74 return (i);
75 }
76 /*
77 * Check if name: value pair
78 */
79 if ((p = strpbrk(lp, ":")) != NULL) {
80 for (q = lp; q < p; q++) {
81 if ((*q == ' ') || (!isprint(*q))) {
82 return (FALSE);
83 }
84 }
85 *ctfp = TRUE;
86 return (H_NAMEVALUE);
87 }
88 return (FALSE);
89 }
90