| | 1 | /* |
| | 2 | * Copyright (c) 1989, 1993 |
| | 3 | * The Regents of the University of California. All rights reserved. |
| | 4 | * |
| | 5 | * Redistribution and use in source and binary forms, with or without |
| | 6 | * modification, are permitted provided that the following conditions |
| | 7 | * are met: |
| | 8 | * 1. Redistributions of source code must retain the above copyright |
| | 9 | * notice, this list of conditions and the following disclaimer. |
| | 10 | * 2. Redistributions in binary form must reproduce the above copyright |
| | 11 | * notice, this list of conditions and the following disclaimer in the |
| | 12 | * documentation and/or other materials provided with the distribution. |
| | 13 | * 4. Neither the name of the University nor the names of its contributors |
| | 14 | * may be used to endorse or promote products derived from this software |
| | 15 | * without specific prior written permission. |
| | 16 | * |
| | 17 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
| | 18 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| | 19 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| | 20 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
| | 21 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| | 22 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| | 23 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| | 24 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| | 25 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| | 26 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| | 27 | * SUCH DAMAGE. |
| | 28 | */ |
| | 29 | |
| | 30 | #if defined(LIBC_SCCS) && !defined(lint) |
| | 31 | static char sccsid[] = "@(#)gethostname.c 8.1 (Berkeley) 6/4/93"; |
| | 32 | #endif /* LIBC_SCCS and not lint */ |
| | 33 | #include <sys/cdefs.h> |
| | 34 | __FBSDID("$FreeBSD: src/lib/libc/gen/gethostname.c,v 1.8 2007/01/09 00:27:54 imp Exp $"); |
| | 35 | |
| | 36 | #include <string.h> |
| | 37 | #include <sys/param.h> |
| | 38 | #include <sys/sysctl.h> |
| | 39 | #include <limits.h> |
| | 40 | |
| | 41 | #include <errno.h> |
| | 42 | #include <unistd.h> |
| | 43 | |
| | 44 | int |
| | 45 | gethostname(name, namelen) |
| | 46 | char *name; |
| | 47 | size_t namelen; |
| | 48 | { |
| | 49 | int mib[2]; |
| | 50 | |
| | 51 | mib[0] = CTL_KERN; |
| | 52 | mib[1] = KERN_HOSTNAME; |
| | 53 | if (namelen < MAXHOSTNAMELEN + 1) { |
| | 54 | char local_buf[MAXHOSTNAMELEN + 1]; |
| | 55 | size_t local_len = sizeof(local_buf); |
| | 56 | if (sysctl(mib, 2, local_buf, &local_len, NULL, 0) == -1) { |
| | 57 | if (errno == ENOMEM) |
| | 58 | errno = ENAMETOOLONG; |
| | 59 | return (-1); |
| | 60 | } |
| | 61 | strncpy(name, local_buf, namelen); |
| | 62 | name[namelen - 1] = 0; |
| | 63 | } else { |
| | 64 | if (sysctl(mib, 2, name, &namelen, NULL, 0) == -1) { |
| | 65 | if (errno == ENOMEM) |
| | 66 | errno = ENAMETOOLONG; |
| | 67 | return (-1); |
| | 68 | } |
| | 69 | } |
| | 70 | return (0); |
| | 71 | } |
projects / apple / libc.git / blame_incremental