2 * Copyright (c) 1980, 1993
3 * The Regents of the University of California. All rights reserved.
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15 * This product includes software developed by the University of
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23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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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
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 1.3 2003/10/04 20:36:48 hmp Exp $
39 * Mail -- a mail program
41 * Generally useful tty stuff.
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 */
52 static int ttyset; /* We must now do erase/kill */
56 * Read all relevant header fields.
60 grabh(struct header *hp, int gflags)
62 struct termios ttybuf;
76 savetstp = signal(SIGTSTP, SIG_DFL);
77 savettou = signal(SIGTTOU, SIG_DFL);
78 savettin = signal(SIGTTIN, SIG_DFL);
83 if (tcgetattr(fileno(stdin), &ttybuf) < 0) {
84 warn("tcgetattr(stdin)");
87 c_erase = ttybuf.c_cc[VERASE];
88 c_kill = ttybuf.c_cc[VKILL];
90 ttybuf.c_cc[VERASE] = _POSIX_VDISABLE;
91 ttybuf.c_cc[VKILL] = _POSIX_VDISABLE;
92 if ((saveint = signal(SIGINT, SIG_IGN)) == SIG_DFL)
93 (void)signal(SIGINT, SIG_DFL);
94 if ((savequit = signal(SIGQUIT, SIG_IGN)) == SIG_DFL)
95 (void)signal(SIGQUIT, SIG_DFL);
98 extproc = ((ttybuf.c_lflag & EXTPROC) ? 1 : 0);
101 if (ioctl(fileno(stdin), TIOCEXT, &flag) < 0)
102 warn("TIOCEXT: off");
104 # endif /* TIOCEXT */
107 saveint = signal(SIGINT, ttyint);
111 if (!ttyset && hp->h_to != NULL)
112 ttyset++, tcsetattr(fileno(stdin), TCSADRAIN, &ttybuf);
115 extract(readtty("To: ", detract(hp->h_to, 0)), GTO);
117 if (gflags & GSUBJECT) {
119 if (!ttyset && hp->h_subject != NULL)
120 ttyset++, tcsetattr(fileno(stdin), TCSADRAIN, &ttybuf);
122 hp->h_subject = readtty("Subject: ", hp->h_subject);
126 if (!ttyset && hp->h_cc != NULL)
127 ttyset++, tcsetattr(fileno(stdin), TCSADRAIN, &ttybuf);
130 extract(readtty("Cc: ", detract(hp->h_cc, 0)), GCC);
134 if (!ttyset && hp->h_bcc != NULL)
135 ttyset++, tcsetattr(fileno(stdin), TCSADRAIN, &ttybuf);
138 extract(readtty("Bcc: ", detract(hp->h_bcc, 0)), GBCC);
141 (void)signal(SIGTSTP, savetstp);
142 (void)signal(SIGTTOU, savettou);
143 (void)signal(SIGTTIN, savettin);
145 ttybuf.c_cc[VERASE] = c_erase;
146 ttybuf.c_cc[VKILL] = c_kill;
148 tcsetattr(fileno(stdin), TCSADRAIN, &ttybuf);
149 (void)signal(SIGQUIT, savequit);
154 if (ioctl(fileno(stdin), TIOCEXT, &flag) < 0)
157 # endif /* TIOCEXT */
159 (void)signal(SIGINT, saveint);
164 * Read up a header from standard input.
165 * The source string has the preliminary contents to
171 readtty(const char *pr, char *src)
173 char ch, canonb[BUFSIZ];
178 (void)fflush(stdout);
179 if (src != NULL && strlen(src) > BUFSIZ - 2) {
180 printf("too long to edit\n");
185 strlcpy(canonb, src, sizeof(canonb));
188 fputs(canonb, stdout);
189 (void)fflush(stdout);
191 cp = src == NULL ? "" : src;
192 while ((c = *cp++) != '\0') {
193 if ((c_erase != _POSIX_VDISABLE && c == c_erase) ||
194 (c_kill != _POSIX_VDISABLE && c == c_kill)) {
196 ioctl(0, TIOCSTI, &ch);
199 ioctl(0, TIOCSTI, &ch);
205 while (cp2 < canonb + BUFSIZ)
210 (void)signal(SIGTSTP, ttystop);
211 (void)signal(SIGTTOU, ttystop);
212 (void)signal(SIGTTIN, ttystop);
214 while (cp2 < canonb + BUFSIZ) {
216 if (c == EOF || c == '\n')
221 (void)signal(SIGTSTP, SIG_DFL);
222 (void)signal(SIGTTOU, SIG_DFL);
223 (void)signal(SIGTTIN, SIG_DFL);
224 if (c == EOF && ferror(stdin)) {
226 cp = strlen(canonb) > 0 ? canonb : NULL;
228 return (readtty(pr, cp));
231 if (cp == NULL || *cp == '\0')
235 return (strlen(canonb) > 0 ? savestr(canonb) : NULL);
236 while (*cp != '\0') {
238 if (c_erase != _POSIX_VDISABLE && c == c_erase) {
241 if (cp2[-1] == '\\') {
248 if (c_kill != _POSIX_VDISABLE && c == c_kill) {
251 if (cp2[-1] == '\\') {
262 if (equal("", canonb))
264 return (savestr(canonb));
268 * Receipt continuation.
273 sig_t old_action = signal(s, SIG_DFL);
276 (void)sigemptyset(&nset);
277 (void)sigaddset(&nset, s);
278 (void)sigprocmask(SIG_BLOCK, &nset, NULL);
280 (void)sigprocmask(SIG_UNBLOCK, &nset, NULL);
281 (void)signal(s, old_action);