bsd-misc.c revision 106121 
1/*
2 * Copyright (c) 1999-2000 Damien Miller.  All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 * 1. Redistributions of source code must retain the above copyright
8 *    notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 *    notice, this list of conditions and the following disclaimer in the
11 *    documentation and/or other materials provided with the distribution.
12 *
13 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
14 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
15 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
16 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
17 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
18 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
19 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
20 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
21 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
22 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
23 */
24
25#include "includes.h"
26
27RCSID("$Id: bsd-misc.c,v 1.10 2002/07/08 21:09:41 mouring Exp $");
28
29char *get_progname(char *argv0)
30{
31#ifdef HAVE___PROGNAME
32	extern char *__progname;
33
34	return __progname;
35#else
36	char *p;
37
38	if (argv0 == NULL)
39		return "unknown";	/* XXX */
40	p = strrchr(argv0, '/');
41	if (p == NULL)
42		p = argv0;
43	else
44		p++;
45	return p;
46#endif
47}
48
49#ifndef HAVE_SETLOGIN
50int setlogin(const char *name)
51{
52	return(0);
53}
54#endif /* !HAVE_SETLOGIN */
55
56#ifndef HAVE_INNETGR
57int innetgr(const char *netgroup, const char *host,
58            const char *user, const char *domain)
59{
60	return(0);
61}
62#endif /* HAVE_INNETGR */
63
64#if !defined(HAVE_SETEUID) && defined(HAVE_SETREUID)
65int seteuid(uid_t euid)
66{
67	return(setreuid(-1,euid));
68}
69#endif /* !defined(HAVE_SETEUID) && defined(HAVE_SETREUID) */
70
71#if !defined(HAVE_SETEGID) && defined(HAVE_SETRESGID)
72int setegid(uid_t egid)
73{
74	return(setresgid(-1,egid,-1));
75}
76#endif /* !defined(HAVE_SETEGID) && defined(HAVE_SETRESGID) */
77
78#if !defined(HAVE_STRERROR) && defined(HAVE_SYS_ERRLIST) && defined(HAVE_SYS_NERR)
79const char *strerror(int e)
80{
81	extern int sys_nerr;
82	extern char *sys_errlist[];
83
84	if ((e >= 0) && (e < sys_nerr))
85		return(sys_errlist[e]);
86	else
87		return("unlisted error");
88}
89#endif
90
91#ifndef HAVE_UTIMES
92int utimes(char *filename, struct timeval *tvp)
93{
94	struct utimbuf ub;
95
96	ub.actime = tvp[0].tv_sec;
97	ub.modtime = tvp[1].tv_sec;
98
99	return(utime(filename, &ub));
100}
101#endif
102
103#ifndef HAVE_TRUNCATE
104int truncate (const char *path, off_t length)
105{
106	int fd, ret, saverrno;
107
108	fd = open(path, O_WRONLY);
109	if (fd < 0)
110		return -1;
111
112	ret = ftruncate(fd, length);
113	saverrno = errno;
114	(void) close (fd);
115	if (ret == -1)
116		errno = saverrno;
117	return(ret);
118}
119#endif /* HAVE_TRUNCATE */
120
121#if !defined(HAVE_SETGROUPS) && defined(SETGROUPS_NOOP)
122/*
123 * Cygwin setgroups should be a noop.
124 */
125int
126setgroups(size_t size, const gid_t *list)
127{
128	return 0;
129}
130#endif
131
132