diff options
Diffstat (limited to 'lib/libc/gen/ctermid.c')
| -rw-r--r-- | lib/libc/gen/ctermid.c | 51 |
1 files changed, 32 insertions, 19 deletions
diff --git a/lib/libc/gen/ctermid.c b/lib/libc/gen/ctermid.c index f88b1f5..8af1cb2 100644 --- a/lib/libc/gen/ctermid.c +++ b/lib/libc/gen/ctermid.c @@ -1,6 +1,6 @@ /*- - * Copyright (c) 1990, 1993 - * The Regents of the University of California. All rights reserved. + * 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 @@ -10,14 +10,11 @@ * 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. - * 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 + * 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 REGENTS OR CONTRIBUTORS BE LIABLE + * 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) @@ -27,31 +24,47 @@ * SUCH DAMAGE. */ -#if defined(LIBC_SCCS) && !defined(lint) -static char sccsid[] = "@(#)ctermid.c 8.1 (Berkeley) 6/4/93"; -#endif /* LIBC_SCCS and not lint */ #include <sys/cdefs.h> __FBSDID("$FreeBSD$"); -#include <stdio.h> +#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[] = _PATH_TTY; + static char def[sizeof(_PATH_DEV) + SPECNAMELEN]; + struct stat sb; + size_t dlen; + int sverrno; - if (s) { - bcopy(def, s, sizeof(_PATH_TTY)); - return(s); - } - return(def); -} + 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) ? ctermid(s) : NULL; + + return (s != NULL ? ctermid(s) : NULL); } |
