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- /*
- * Copyright (c) 1980 Regents of the University of California.
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms are permitted
- * provided that this notice is preserved and that due credit is given
- * to the University of California at Berkeley. The name of the University
- * may not be used to endorse or promote products derived from this
- * software without specific prior written permission. This software
- * is provided ``as is'' without express or implied warranty.
- */
-
- #ifdef notdef
- static char sccsid[] = "@(#)tty.c 5.5 (Berkeley) 2/18/88";
- #endif /* notdef */
-
- /*
- * Mail -- a mail program
- *
- * Generally useful tty stuff.
- */
-
- #include "rcv.h"
-
- static int c_erase; /* Current erase char */
- static int c_kill; /* Current kill char */
- static int hadcont; /* Saw continue signal */
- static jmp_buf rewrite; /* Place to go when continued */
- #ifndef TIOCSTI
- static int ttyset; /* We must now do erase/kill */
- #endif
-
- /*
- * Read all relevant header fields.
- */
-
- grabh(hp, gflags)
- struct header *hp;
- {
- struct sgttyb ttybuf;
- #ifndef TIOCSTI
- int (*saveint)(), (*savequit)();
- #endif
- int (*savecont)();
- int errs;
-
- savecont = signal(SIGCONT, SIG_DFL);
- errs = 0;
- #ifndef TIOCSTI
- ttyset = 0;
- #endif
- if (gtty(fileno(stdin), &ttybuf) < 0) {
- perror("gtty");
- return(-1);
- }
- c_erase = ttybuf.sg_erase;
- c_kill = ttybuf.sg_kill;
- #ifndef TIOCSTI
- ttybuf.sg_erase = 0;
- ttybuf.sg_kill = 0;
- if ((saveint = signal(SIGINT, SIG_IGN)) == SIG_DFL)
- signal(SIGINT, SIG_DFL);
- if ((savequit = signal(SIGQUIT, SIG_IGN)) == SIG_DFL)
- signal(SIGQUIT, SIG_DFL);
- #endif
- if (gflags & GTO) {
- #ifndef TIOCSTI
- if (!ttyset && hp->h_to != NOSTR)
- ttyset++, stty(fileno(stdin), &ttybuf);
- #endif
- hp->h_to = readtty("To: ", hp->h_to);
- if (hp->h_to != NOSTR)
- hp->h_seq++;
- }
- if (gflags & GSUBJECT) {
- #ifndef TIOCSTI
- if (!ttyset && hp->h_subject != NOSTR)
- ttyset++, stty(fileno(stdin), &ttybuf);
- #endif
- hp->h_subject = readtty("Subject: ", hp->h_subject);
- if (hp->h_subject != NOSTR)
- hp->h_seq++;
- }
- if (gflags & GCC) {
- #ifndef TIOCSTI
- if (!ttyset && hp->h_cc != NOSTR)
- ttyset++, stty(fileno(stdin), &ttybuf);
- #endif
- hp->h_cc = readtty("Cc: ", hp->h_cc);
- if (hp->h_cc != NOSTR)
- hp->h_seq++;
- }
- if (gflags & GBCC) {
- #ifndef TIOCSTI
- if (!ttyset && hp->h_bcc != NOSTR)
- ttyset++, stty(fileno(stdin), &ttybuf);
- #endif
- hp->h_bcc = readtty("Bcc: ", hp->h_bcc);
- if (hp->h_bcc != NOSTR)
- hp->h_seq++;
- }
- signal(SIGCONT, savecont);
- #ifndef TIOCSTI
- ttybuf.sg_erase = c_erase;
- ttybuf.sg_kill = c_kill;
- if (ttyset)
- stty(fileno(stdin), &ttybuf);
- signal(SIGINT, saveint);
- signal(SIGQUIT, savequit);
- #endif
- return(errs);
- }
-
- /*
- * Read up a header from standard input.
- * The source string has the preliminary contents to
- * be read.
- *
- */
-
- char *
- readtty(pr, src)
- char pr[], src[];
- {
- char ch, canonb[BUFSIZ];
- int c;
- register char *cp, *cp2;
- int ttycont();
-
- fputs(pr, stdout);
- fflush(stdout);
- if (src != NOSTR && strlen(src) > BUFSIZ - 2) {
- printf("too long to edit\n");
- return(src);
- }
- #ifndef TIOCSTI
- if (src != NOSTR)
- cp = copy(src, canonb);
- else
- cp = copy("", canonb);
- fputs(canonb, stdout);
- fflush(stdout);
- #else
- cp = src == NOSTR ? "" : src;
- while (c = *cp++) {
- if (c == c_erase || c == c_kill) {
- ch = '\\';
- ioctl(0, TIOCSTI, &ch);
- }
- ch = c;
- ioctl(0, TIOCSTI, &ch);
- }
- cp = canonb;
- *cp = 0;
- #endif
- cp2 = cp;
- while (cp2 < canonb + BUFSIZ)
- *cp2++ = 0;
- cp2 = cp;
- if (setjmp(rewrite))
- goto redo;
- signal(SIGCONT, ttycont);
- clearerr(stdin);
- while (cp2 < canonb + BUFSIZ) {
- c = getc(stdin);
- if (c == EOF || c == '\n')
- break;
- *cp2++ = c;
- }
- *cp2 = 0;
- signal(SIGCONT, SIG_DFL);
- if (c == EOF && ferror(stdin) && hadcont) {
- redo:
- hadcont = 0;
- cp = strlen(canonb) > 0 ? canonb : NOSTR;
- clearerr(stdin);
- return(readtty(pr, cp));
- }
- #ifndef TIOCSTI
- if (cp == NOSTR || *cp == '\0')
- return(src);
- cp2 = cp;
- if (!ttyset)
- return(strlen(canonb) > 0 ? savestr(canonb) : NOSTR);
- while (*cp != '\0') {
- c = *cp++;
- if (c == c_erase) {
- if (cp2 == canonb)
- continue;
- if (cp2[-1] == '\\') {
- cp2[-1] = c;
- continue;
- }
- cp2--;
- continue;
- }
- if (c == c_kill) {
- if (cp2 == canonb)
- continue;
- if (cp2[-1] == '\\') {
- cp2[-1] = c;
- continue;
- }
- cp2 = canonb;
- continue;
- }
- *cp2++ = c;
- }
- *cp2 = '\0';
- #endif
- if (equal("", canonb))
- return(NOSTR);
- return(savestr(canonb));
- }
-
- /*
- * Receipt continuation.
- */
- /*ARGSUSED*/
- ttycont(s)
- {
- hadcont++;
- longjmp(rewrite, 1);
- }
-