/*- * Copyright (c) 2011 Ed Schouten <ed@FreeBSD.org> * 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. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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. */ #include <sys/cdefs.h> __FBSDID("$FreeBSD$"); #include <sys/param.h> #include <sys/stat.h> #include <sys/sysctl.h> #include <errno.h> #include <paths.h> #include <stdio.h> #include <string.h> #define LEN_PATH_DEV (sizeof(_PATH_DEV) - 1) char * ctermid(char *s) { static char def[sizeof(_PATH_DEV) + SPECNAMELEN]; struct stat sb; size_t dlen; int sverrno; if (s == NULL) { s = def; dlen = sizeof(def) - LEN_PATH_DEV; } else dlen = L_ctermid - LEN_PATH_DEV; strcpy(s, _PATH_TTY); /* Attempt to perform a lookup of the actual TTY pathname. */ sverrno = errno; if (stat(_PATH_TTY, &sb) == 0 && S_ISCHR(sb.st_mode)) (void)sysctlbyname("kern.devname", s + LEN_PATH_DEV, &dlen, &sb.st_rdev, sizeof(sb.st_rdev)); errno = sverrno; return (s); } char * ctermid_r(char *s) { return (s != NULL ? ctermid(s) : NULL); } |