Remove not needed void casts.
[dragonfly.git] / bin / rcp / util.c
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1/*-
2 * Copyright (c) 1992, 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 * 3. All advertising materials mentioning features or use of this software
14 * must display the following acknowledgement:
15 * This product includes software developed by the University of
16 * California, Berkeley and its contributors.
17 * 4. Neither the name of the University nor the names of its contributors
18 * may be used to endorse or promote products derived from this software
19 * without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
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32 *
33 * @(#)util.c 8.2 (Berkeley) 4/2/94
34 * $FreeBSD: src/bin/rcp/util.c,v 1.9.2.3 2002/07/19 07:54:51 jmallett Exp $
57fed2af 35 * $DragonFly: src/bin/rcp/util.c,v 1.4 2004/11/07 20:54:51 eirikn Exp $
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36 */
37
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38#include <sys/param.h>
39#include <sys/stat.h>
40#include <sys/wait.h>
41
42#include <ctype.h>
43#include <err.h>
44#include <errno.h>
45#include <paths.h>
46#include <signal.h>
47#include <stdio.h>
48#include <stdlib.h>
49#include <string.h>
50#include <unistd.h>
51
52#include "extern.h"
53
54char *
55colon(char *cp)
56{
57 if (*cp == ':') /* Leading colon is part of file name. */
58 return (0);
59
60 for (; *cp; ++cp) {
61 if (*cp == ':')
62 return (cp);
63 if (*cp == '/')
64 return (0);
65 }
66 return (0);
67}
68
69void
70verifydir(char *cp)
71{
72 struct stat stb;
73
74 if (!stat(cp, &stb)) {
75 if (S_ISDIR(stb.st_mode))
76 return;
77 errno = ENOTDIR;
78 }
79 run_err("%s: %s", cp, strerror(errno));
80 exit(1);
81}
82
83int
84okname(char *cp0)
85{
86 int c;
87 char *cp;
88
89 cp = cp0;
90 do {
91 c = *cp;
92 if (c & 0200)
93 goto bad;
94 if (!isalpha(c) && !isdigit(c) && c != '_' && c != '-' && c != '.')
95 goto bad;
96 } while (*++cp);
97 return (1);
98
99bad: warnx("%s: invalid user name", cp0);
100 return (0);
101}
102
103int
104susystem(char *s, int userid)
105{
106 sig_t istat, qstat;
107 int status;
108 pid_t pid;
109
110 pid = vfork();
111 switch (pid) {
112 case -1:
113 return (127);
114
115 case 0:
57fed2af 116 setuid(userid);
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117 execl(_PATH_BSHELL, "sh", "-c", s, (char *)NULL);
118 _exit(127);
119 }
120 istat = signal(SIGINT, SIG_IGN);
121 qstat = signal(SIGQUIT, SIG_IGN);
122 if (waitpid(pid, &status, 0) < 0)
123 status = -1;
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124 signal(SIGINT, istat);
125 signal(SIGQUIT, qstat);
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126 return (status);
127}
128
129BUF *
130allocbuf(BUF *bp, int fd, int blksize)
131{
132 struct stat stb;
133 size_t size;
134
135 if (fstat(fd, &stb) < 0) {
136 run_err("fstat: %s", strerror(errno));
137 return (0);
138 }
139 size = roundup(stb.st_blksize, blksize);
140 if (size == 0)
141 size = blksize;
142 if (bp->cnt >= size)
143 return (bp);
144 if ((bp->buf = realloc(bp->buf, size)) == NULL) {
145 bp->cnt = 0;
146 run_err("%s", strerror(errno));
147 return (0);
148 }
149 bp->cnt = size;
150 return (bp);
151}
152
a78cd756 153/* ARGSUSED */
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154void
155lostconn(int signo)
156{
157 if (!iamremote)
158 warnx("lost connection");
159 exit(1);
160}