2 * Copyright (c) 1991, 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
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9 * notice, this list of conditions and the following disclaimer.
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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.
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35 static char sccsid[] = "@(#)term.c 8.1 (Berkeley) 6/9/93";
38 #include <sys/types.h>
47 char tbuf[1024]; /* Termcap entry. */
49 char *askuser __P((char *));
50 char *ttys __P((char *));
53 * Figure out what kind of terminal we're dealing with, and then read in
57 get_termcap_entry(userarg, tcapbufp)
58 char *userarg, **tcapbufp;
62 char *p, *ttype, *ttypath;
69 /* Try the environment. */
70 if (ttype = getenv("TERM"))
73 /* Try ttyname(3); check for dialup or other mapping. */
74 if (ttypath = ttyname(STDERR_FILENO)) {
75 if (p = rindex(ttypath, '/'))
79 if ((t = getttynam(p))) {
85 /* If still undefined, use "unknown". */
88 map: ttype = mapped(ttype);
91 * If not a path, remove TERMCAP from the environment so we get a
92 * real entry from /etc/termcap. This prevents us from being fooled
93 * by out of date stuff in the environment.
95 found: if ((p = getenv("TERMCAP")) != NULL && *p != '/')
99 * ttype now contains a pointer to the type of the terminal.
100 * If the first character is '?', ask the user.
103 if (ttype[1] != '\0')
104 ttype = askuser(ttype + 1);
106 ttype = askuser(NULL);
108 /* Find the termcap entry. If it doesn't exist, ask the user. */
109 while ((rval = tgetent(tbuf, ttype)) == 0) {
110 (void)fprintf(stderr,
111 "tset: terminal type %s is unknown\n", ttype);
112 ttype = askuser(NULL);
115 err("termcap: %s", strerror(errno ? errno : ENOENT));
120 /* Prompt the user for a terminal type. */
125 static char answer[256];
128 /* We can get recalled; if so, don't continue uselessly. */
129 if (feof(stdin) || ferror(stdin)) {
130 (void)fprintf(stderr, "\n");
135 (void)fprintf(stderr, "Terminal type? [%s] ", dflt);
137 (void)fprintf(stderr, "Terminal type? ");
138 (void)fflush(stderr);
140 if (fgets(answer, sizeof(answer), stdin) == NULL) {
142 (void)fprintf(stderr, "\n");
148 if (p = index(answer, '\n'))