diff options
Diffstat (limited to 'lib/libc/gen/devname.c')
-rw-r--r-- | lib/libc/gen/devname.c | 75 |
1 files changed, 75 insertions, 0 deletions
diff --git a/lib/libc/gen/devname.c b/lib/libc/gen/devname.c new file mode 100644 index 0000000..da0b923 --- /dev/null +++ b/lib/libc/gen/devname.c @@ -0,0 +1,75 @@ +/* + * Copyright (c) 1989, 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. + * 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. + */ + +#if defined(LIBC_SCCS) && !defined(lint) +static char sccsid[] = "@(#)devname.c 8.2 (Berkeley) 4/29/95"; +#endif /* LIBC_SCCS and not lint */ +#include <sys/cdefs.h> +__FBSDID("$FreeBSD$"); + +#include <sys/types.h> +#include <sys/sysctl.h> + +#include <stdio.h> +#include <stdint.h> +#include <string.h> +#include <sys/param.h> +#include <sys/stat.h> + +char * +devname_r(dev_t dev, mode_t type, char *buf, int len) +{ + int i; + size_t j; + + if (dev == NODEV || !(S_ISCHR(type) || S_ISBLK(dev))) { + strlcpy(buf, "#NODEV", len); + return (buf); + } + + if (S_ISCHR(type)) { + j = len; + i = sysctlbyname("kern.devname", buf, &j, &dev, sizeof (dev)); + if (i == 0) + return (buf); + } + + /* Finally just format it */ + snprintf(buf, len, "#%c:%#jx", + S_ISCHR(type) ? 'C' : 'B', (uintmax_t)dev); + return (buf); +} + +char * +devname(dev_t dev, mode_t type) +{ + static char buf[SPECNAMELEN + 1]; + + return (devname_r(dev, type, buf, sizeof(buf))); +} |