xref: /illumos-gate/usr/src/cmd/bnu/uucpname.c (revision d583b39bfb4e2571d3e41097c5c357ffe353ad45)
1 /*
2  * CDDL HEADER START
3  *
4  * The contents of this file are subject to the terms of the
5  * Common Development and Distribution License, Version 1.0 only
6  * (the "License").  You may not use this file except in compliance
7  * with the License.
8  *
9  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10  * or http://www.opensolaris.org/os/licensing.
11  * See the License for the specific language governing permissions
12  * and limitations under the License.
13  *
14  * When distributing Covered Code, include this CDDL HEADER in each
15  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16  * If applicable, add the following below this CDDL HEADER, with the
17  * fields enclosed by brackets "[]" replaced with your own identifying
18  * information: Portions Copyright [yyyy] [name of copyright owner]
19  *
20  * CDDL HEADER END
21  */
22 /*
23  * Copyright 1995 Sun Microsystems, Inc.  All rights reserved.
24  * Use is subject to license terms.
25  */
26 
27 /*	Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T	*/
28 /*	  All Rights Reserved  	*/
29 
30 
31 #pragma ident	"%Z%%M%	%I%	%E% SMI"
32 
33 #include "uucp.h"
34 
35 /*
36  * get the uucp name
37  * return:
38  *	none
39  */
40 void
41 uucpname(name)
42 register char *name;
43 {
44 	char *s;
45 	char NameBuf[MAXBASENAME + 1];
46 	FILE *NameFile;
47 
48 	NameBuf[0] = '\0';
49 	if ((NameFile = fopen(SYSNAMEFILE, "r")) != NULL) {
50 		if (fscanf(NameFile, "%14s", NameBuf) != 1) {
51 			(void) fprintf(stderr,
52 				gettext("No system name specified in %s\n"),
53 				SYSNAMEFILE);
54 			cleanup(-1);
55 		}
56 		s = NameBuf;
57 		(void) fclose(NameFile);
58 	} else {
59 #ifdef BSD4_2
60 	char	NameBuf[MAXBASENAME + 1];
61 
62 	gethostname(NameBuf, MAXBASENAME);
63 	/* strip off any domain name part */
64 	if ((s = index(NameBuf, '.')) != NULL)
65 		*s = '\0';
66 	s = NameBuf;
67 	s[MAXBASENAME] = '\0';
68 #else /* !BSD4_2 */
69 #ifdef UNAME
70 	struct utsname utsn;
71 
72 	uname(&utsn);
73 	s = utsn.nodename;
74 #else /* !UNAME */
75 	char	NameBuf[MAXBASENAME + 1], *strchr();
76 	FILE	*NameFile;
77 
78 	s = MYNAME;
79 	NameBuf[0] = '\0';
80 
81 	if ((NameFile = fopen("/etc/whoami", "r")) != NULL) {
82 		/* etc/whoami wins */
83 		(void) fgets(NameBuf, MAXBASENAME + 1, NameFile);
84 		(void) fclose(NameFile);
85 		NameBuf[MAXBASENAME] = '\0';
86 		if (NameBuf[0] != '\0') {
87 			if ((s = strchr(NameBuf, '\n')) != NULL)
88 				*s = '\0';
89 			s = NameBuf;
90 		}
91 	}
92 #endif /* UNAME */
93 #endif /* BSD4_2 */
94 	}
95 
96 	(void) strncpy(name, s, MAXBASENAME);
97 	name[MAXBASENAME] = '\0';
98 	/* strip off any domain name from the host name */
99 	if ((s = strchr(name, '.')) != NULL)
100 		*s = '\0';
101 	return;
102 }
103