diff options
Diffstat (limited to 'usr.bin/tset/term.c')
| -rw-r--r-- | usr.bin/tset/term.c | 155 |
1 files changed, 155 insertions, 0 deletions
diff --git a/usr.bin/tset/term.c b/usr.bin/tset/term.c new file mode 100644 index 0000000..dc652e3 --- /dev/null +++ b/usr.bin/tset/term.c @@ -0,0 +1,155 @@ +/*- + * Copyright (c) 1991, 1993 + * The Regents of the University of California. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. All advertising materials mentioning features or use of this software + * must display the following acknowledgement: + * This product includes software developed by the University of + * California, Berkeley and its contributors. + * 4. Neither the name of the University nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + +#ifndef lint +static char sccsid[] = "@(#)term.c 8.1 (Berkeley) 6/9/93"; +#endif /* not lint */ + +#include <sys/types.h> +#include <errno.h> +#include <ttyent.h> +#include <unistd.h> +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include "extern.h" + +char tbuf[1024]; /* Termcap entry. */ + +char *askuser __P((char *)); +char *ttys __P((char *)); + +/* + * Figure out what kind of terminal we're dealing with, and then read in + * its termcap entry. + */ +char * +get_termcap_entry(userarg, tcapbufp) + char *userarg, **tcapbufp; +{ + struct ttyent *t; + int rval; + char *p, *ttype, *ttypath; + + if (userarg) { + ttype = userarg; + goto found; + } + + /* Try the environment. */ + if (ttype = getenv("TERM")) + goto map; + + /* Try ttyname(3); check for dialup or other mapping. */ + if (ttypath = ttyname(STDERR_FILENO)) { + if (p = rindex(ttypath, '/')) + ++p; + else + p = ttypath; + if ((t = getttynam(p))) { + ttype = t->ty_type; + goto map; + } + } + + /* If still undefined, use "unknown". */ + ttype = "unknown"; + +map: ttype = mapped(ttype); + + /* + * If not a path, remove TERMCAP from the environment so we get a + * real entry from /etc/termcap. This prevents us from being fooled + * by out of date stuff in the environment. + */ +found: if ((p = getenv("TERMCAP")) != NULL && *p != '/') + unsetenv("TERMCAP"); + + /* + * ttype now contains a pointer to the type of the terminal. + * If the first character is '?', ask the user. + */ + if (ttype[0] == '?') + if (ttype[1] != '\0') + ttype = askuser(ttype + 1); + else + ttype = askuser(NULL); + + /* Find the termcap entry. If it doesn't exist, ask the user. */ + while ((rval = tgetent(tbuf, ttype)) == 0) { + (void)fprintf(stderr, + "tset: terminal type %s is unknown\n", ttype); + ttype = askuser(NULL); + } + if (rval == -1) + err("termcap: %s", strerror(errno ? errno : ENOENT)); + *tcapbufp = tbuf; + return (ttype); +} + +/* Prompt the user for a terminal type. */ +char * +askuser(dflt) + char *dflt; +{ + static char answer[256]; + char *p; + + /* We can get recalled; if so, don't continue uselessly. */ + if (feof(stdin) || ferror(stdin)) { + (void)fprintf(stderr, "\n"); + exit(1); + } + for (;;) { + if (dflt) + (void)fprintf(stderr, "Terminal type? [%s] ", dflt); + else + (void)fprintf(stderr, "Terminal type? "); + (void)fflush(stderr); + + if (fgets(answer, sizeof(answer), stdin) == NULL) { + if (dflt == NULL) { + (void)fprintf(stderr, "\n"); + exit(1); + } + return (dflt); + } + + if (p = index(answer, '\n')) + *p = '\0'; + if (answer[0]) + return (answer); + if (dflt != NULL) + return (dflt); + } +} |
