netsmb: Fix a warning and put smb_usr.c under -Werror, too.
[dragonfly.git] / usr.bin / mail / tty.c
blobbf0ef92d4b9ce293a03af27954f5532078c58ae6
1 /*
2 * Copyright (c) 1980, 1993
3 * The Regents of the University of California. All rights reserved.
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. All advertising materials mentioning features or use of this software
14 * must display the following acknowledgement:
15 * This product includes software developed by the University of
16 * California, Berkeley and its contributors.
17 * 4. Neither the name of the University nor the names of its contributors
18 * may be used to endorse or promote products derived from this software
19 * without specific prior written permission.
21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
33 * @(#)tty.c 8.2 (Berkeley) 6/6/93
34 * $FreeBSD: src/usr.bin/mail/tty.c,v 1.2.8.3 2003/01/06 05:46:04 mikeh Exp $
35 * $DragonFly: src/usr.bin/mail/tty.c,v 1.5 2004/09/08 03:01:11 joerg Exp $
39 * Mail -- a mail program
41 * Generally useful tty stuff.
44 #include "rcv.h"
45 #include "extern.h"
47 static cc_t c_erase; /* Current erase char */
48 static cc_t c_kill; /* Current kill char */
49 static jmp_buf rewrite; /* Place to go when continued */
50 static jmp_buf intjmp; /* Place to go when interrupted */
53 * Read all relevant header fields.
56 int
57 grabh(struct header *hp, int gflags)
59 struct termios ttybuf;
60 sig_t saveint;
61 sig_t savetstp;
62 sig_t savettou;
63 sig_t savettin;
64 int errs;
65 int extproc, flag;
67 savetstp = signal(SIGTSTP, SIG_DFL);
68 savettou = signal(SIGTTOU, SIG_DFL);
69 savettin = signal(SIGTTIN, SIG_DFL);
70 errs = 0;
71 if (tcgetattr(fileno(stdin), &ttybuf) < 0) {
72 warn("tcgetattr(stdin)");
73 return (-1);
75 c_erase = ttybuf.c_cc[VERASE];
76 c_kill = ttybuf.c_cc[VKILL];
77 extproc = ((ttybuf.c_lflag & EXTPROC) ? 1 : 0);
78 if (extproc) {
79 flag = 0;
80 if (ioctl(fileno(stdin), TIOCEXT, &flag) < 0)
81 warn("TIOCEXT: off");
83 if (setjmp(intjmp))
84 goto out;
85 saveint = signal(SIGINT, ttyint);
86 if (gflags & GTO) {
87 hp->h_to =
88 extract(readtty("To: ", detract(hp->h_to, 0)), GTO);
90 if (gflags & GSUBJECT) {
91 hp->h_subject = readtty("Subject: ", hp->h_subject);
93 if (gflags & GCC) {
94 hp->h_cc =
95 extract(readtty("Cc: ", detract(hp->h_cc, 0)), GCC);
97 if (gflags & GBCC) {
98 hp->h_bcc =
99 extract(readtty("Bcc: ", detract(hp->h_bcc, 0)), GBCC);
101 out:
102 signal(SIGTSTP, savetstp);
103 signal(SIGTTOU, savettou);
104 signal(SIGTTIN, savettin);
105 if (extproc) {
106 flag = 1;
107 if (ioctl(fileno(stdin), TIOCEXT, &flag) < 0)
108 warn("TIOCEXT: on");
110 signal(SIGINT, saveint);
111 return (errs);
115 * Read up a header from standard input.
116 * The source string has the preliminary contents to
117 * be read.
121 char *
122 readtty(const char *pr, char *src)
124 char ch, canonb[BUFSIZ];
125 int c;
126 char *cp, *cp2;
128 fputs(pr, stdout);
129 fflush(stdout);
130 if (src != NULL && strlen(src) > BUFSIZ - 2) {
131 printf("too long to edit\n");
132 return (src);
134 cp = src == NULL ? "" : src;
135 while ((c = *cp++) != '\0') {
136 if ((c_erase != _POSIX_VDISABLE && c == c_erase) ||
137 (c_kill != _POSIX_VDISABLE && c == c_kill)) {
138 ch = '\\';
139 ioctl(0, TIOCSTI, &ch);
141 ch = c;
142 ioctl(0, TIOCSTI, &ch);
144 cp = canonb;
145 *cp = '\0';
146 cp2 = cp;
147 while (cp2 < canonb + BUFSIZ)
148 *cp2++ = '\0';
149 cp2 = cp;
150 if (setjmp(rewrite))
151 goto redo;
152 signal(SIGTSTP, ttystop);
153 signal(SIGTTOU, ttystop);
154 signal(SIGTTIN, ttystop);
155 clearerr(stdin);
156 while (cp2 < canonb + BUFSIZ) {
157 c = getc(stdin);
158 if (c == EOF || c == '\n')
159 break;
160 *cp2++ = c;
162 *cp2 = '\0';
163 signal(SIGTSTP, SIG_DFL);
164 signal(SIGTTOU, SIG_DFL);
165 signal(SIGTTIN, SIG_DFL);
166 if (c == EOF && ferror(stdin)) {
167 redo:
168 cp = strlen(canonb) > 0 ? canonb : NULL;
169 clearerr(stdin);
170 return (readtty(pr, cp));
172 if (equal("", canonb))
173 return (NULL);
174 return (savestr(canonb));
178 * Receipt continuation.
180 void
181 ttystop(int s)
183 sig_t old_action = signal(s, SIG_DFL);
184 sigset_t nset;
186 sigemptyset(&nset);
187 sigaddset(&nset, s);
188 sigprocmask(SIG_BLOCK, &nset, NULL);
189 kill(0, s);
190 sigprocmask(SIG_UNBLOCK, &nset, NULL);
191 signal(s, old_action);
192 longjmp(rewrite, 1);
195 /*ARGSUSED*/
196 void
197 ttyint(int s)
199 longjmp(intjmp, 1);