/* $OpenBSD: ttyflags.c,v 1.13 2012/12/04 02:27:00 deraadt Exp $ */ /* $NetBSD: ttyflags.c,v 1.8 1996/04/09 05:20:30 cgd Exp $ */ /* * Copyright (c) 1996 Theo de Raadt * 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. */ #include <sys/types.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 <string.h> #include <ttyent.h> #include <unistd.h> int all(int); int ttys(char **, int); int ttyflags(struct ttyent *, int); void usage(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(int argc, char *argv[]) { int aflag, ch, rval, pflag = 0; aflag = nflag = vflag = 0; while ((ch = getopt(argc, argv, "panv")) != -1) switch (ch) { case 'a': aflag = 1; break; case 'n': /* undocumented */ nflag = 1; break; case 'p': pflag = 1; break; case 'v': vflag = 1; break; case '?': default: usage(); } argc -= optind; argv += optind; if (aflag && argc != 0) usage(); if (setttyent() == 0) err(1, "setttyent"); if (aflag) rval = all(pflag); else rval = ttys(argv, pflag); if (endttyent() == 0) warn("endttyent"); exit(rval); } /* * Change all /etc/ttys entries' flags. */ int all(int print) { struct ttyent *tep; int rval; rval = 0; for (tep = getttyent(); tep != NULL; tep = getttyent()) if (ttyflags(tep, print)) rval = 1; return (rval); } /* * Change the specified ttys' flags. */ int ttys(char **ttylist, int print) { 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 (ttyflags(tep, print)) rval = 1; } return (rval); } /* * Actually do the work; find out what the new flags value should be, * open the device, and change the flags. */ int ttyflags(struct ttyent *tep, int print) { int fd, flags = 0, rval = 0, st, sep = 0; char path[PATH_MAX]; char strflags[256]; st = tep->ty_status; strflags[0] = '\0'; /* Find the full device path name. */ (void)snprintf(path, sizeof path, "%s%s", _PATH_DEV, tep->ty_name); if (print == 0) { /* Convert ttyent.h flags into ioctl flags. */ if (st & TTY_LOCAL) { flags |= TIOCFLAG_CLOCAL; (void)strlcat(strflags, "local", sizeof strflags); sep++; } if (st & TTY_RTSCTS) { flags |= TIOCFLAG_CRTSCTS; if (sep++) (void)strlcat(strflags, "|", sizeof strflags); (void)strlcat(strflags, "rtscts", sizeof strflags); } if (st & TTY_SOFTCAR) { flags |= TIOCFLAG_SOFTCAR; if (sep++) (void)strlcat(strflags, "|", sizeof strflags); (void)strlcat(strflags, "softcar", sizeof strflags); } if (st & TTY_MDMBUF) { flags |= TIOCFLAG_MDMBUF; if (sep++) (void)strlcat(strflags, "|", sizeof strflags); (void)strlcat(strflags, "mdmbuf", sizeof strflags); } if (vflag) printf("%s setting flags to: %s\n", path, strflags); } 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 == ENXIO || (errno == ENOENT && (st & TTY_ON) == 0))) rval = 1; if (vflag) warn("open %s", path); return (rval); } if (print == 0) { if (ioctl(fd, TIOCSFLAGS, &flags) == -1) if (errno != ENOTTY || vflag) { warn("TIOCSFLAGS on %s", path); rval = (errno != ENOTTY); } } else { if (ioctl(fd, TIOCGFLAGS, &flags) == -1) if (errno != ENOTTY || vflag) { warn("TIOCGFLAGS on %s", path); rval = (errno != ENOTTY); } if (flags & TIOCFLAG_CLOCAL) { (void)strlcat(strflags, "local", sizeof strflags); sep++; } if (flags & TIOCFLAG_CRTSCTS) { if (sep++) (void)strlcat(strflags, "|", sizeof strflags); (void)strlcat(strflags, "rtscts", sizeof strflags); } if (flags & TIOCFLAG_SOFTCAR) { if (sep++) (void)strlcat(strflags, "|", sizeof strflags); (void)strlcat(strflags, "softcar", sizeof strflags); } if (flags & TIOCFLAG_MDMBUF) { if (sep++) (void)strlcat(strflags, "|", sizeof strflags); (void)strlcat(strflags, "mdmbuf", sizeof strflags); } printf("%s flags are: %s\n", path, strflags); } 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) { (void)fprintf(stderr, "usage: ttyflags [-pv] [-a | tty ...]\n"); exit(1); }