NetBSD/sbin/ttyflags/ttyflags.c

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/*
* Copyright (c) 1994 Christopher G. Demetriou
* 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 Christopher G. Demetriou.
* 4. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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
char copyright[] =
"@(#) Copyright (c) 1994 Christopher G. Demetriou\n\
All rights reserved.\n";
#endif /* not lint */
#ifndef lint
static char rcsid[] = "$Id: ttyflags.c,v 1.3 1994/04/19 03:42:54 cgd Exp $";
#endif /* not lint */
#include <sys/types.h>
#include <sys/cdefs.h>
#include <sys/ioctl.h>
#include <err.h>
#include <errno.h>
#include <fcntl.h>
#include <limits.h>
#include <paths.h>
#include <stdio.h>
#include <stdlib.h>
#include <ttyent.h>
#include <unistd.h>
int change_all __P((void));
int change_ttyflags __P((struct ttyent *));
int change_ttys __P((char **));
void usage __P((void));
int nflag, vflag;
/*
* Ttyflags sets the device-specific tty flags, based on the contents
* of /etc/ttys. It can either set all of the ttys' flags, or set
* the flags of the ttys specified on the command line.
*/
int
main(argc, argv)
int argc;
char *argv[];
{
int aflag, ch, rval;
aflag = nflag = vflag = 0;
while ((ch = getopt(argc, argv, "anv")) != EOF)
switch (ch) {
case 'a':
aflag = 1;
break;
case 'n': /* undocumented */
nflag = 1;
break;
case 'v':
vflag = 1;
break;
case '?':
default:
usage();
}
argc -= optind;
argv += optind;
if (aflag && argc != 0)
usage();
rval = 0;
if (setttyent() == 0)
err(1, "setttyent");
if (aflag)
rval = change_all();
else
rval = change_ttys(argv);
if (endttyent() == 0)
warn("endttyent");
exit(rval);
}
/*
* Change all /etc/ttys entries' flags.
*/
int
change_all()
{
struct ttyent *tep;
int rval;
rval = 0;
for (tep = getttyent(); tep != NULL; tep = getttyent())
if (change_ttyflags(tep))
rval = 1;
return (rval);
}
/*
* Change the specified ttys' flags.
*/
int
change_ttys(ttylist)
char **ttylist;
{
struct ttyent *tep;
int rval;
rval = 0;
for (; *ttylist != NULL; ttylist++) {
tep = getttynam(*ttylist);
if (tep == NULL) {
warnx("couldn't find an entry in %s for \"%s\"",
_PATH_TTYS, *ttylist);
rval = 1;
continue;
}
if (change_ttyflags(tep))
rval = 1;
}
return (rval);
}
/*
* Acutually do the work; find out what the new flags value should be,
* open the device, and change the flags.
*/
int
change_ttyflags(tep)
struct ttyent *tep;
{
int fd, flags, rval, st;
char path[PATH_MAX];
st = tep->ty_status;
flags = rval = 0;
/* Convert ttyent.h flags into ioctl flags. */
if (st & TTY_LOCAL)
flags |= TIOCFLAG_CLOCAL;
if (st & TTY_RTSCTS)
flags |= TIOCFLAG_CRTSCTS;
if (st & TTY_SOFTCAR)
flags |= TIOCFLAG_SOFTCAR;
if (st & TTY_MDMBUF)
flags |= TIOCFLAG_MDMBUF;
/* Find the full device path name. */
(void)snprintf(path, sizeof path, "%s%s", _PATH_DEV, tep->ty_name);
if (vflag)
warnx("setting flags on %s to %0x", path, flags);
if (nflag)
return (0);
/* Open the device NON-BLOCKING, set the flags, and close it. */
if ((fd = open(path, O_RDONLY | O_NONBLOCK, 0)) == -1) {
if ((errno != ENOENT && errno != ENXIO) || (st & TTY_ON) != 0)
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rval = 1;
if (rval || vflag)
warn("open %s", path);
return (rval);
}
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if (ioctl(fd, TIOCSFLAGS, &flags) == -1)
if (errno != ENOTTY || vflag) {
warn("TIOCSFLAGS on %s", path);
rval = (errno != ENOTTY);
}
if (close(fd) == -1) {
warn("close %s", path);
return (1);
}
return (rval);
}
/*
* Print usage information when a bogus set of arguments is given.
*/
void
usage()
{
(void)fprintf(stderr, "usage: ttyflags [-v] [-a | tty ... ]\n");
exit(1);
}