Initial import from FreeBSD RELENG_4:
[dragonfly.git] / bin / rcp / util.c
CommitLineData
984263bc
MD
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.
32 */
33
34#ifndef lint
35#if 0
36static char sccsid[] = "@(#)util.c 8.2 (Berkeley) 4/2/94";
37#endif
38#endif /* not lint */
39#include <sys/cdefs.h>
40__FBSDID("$FreeBSD: src/bin/rcp/util.c,v 1.9.2.3 2002/07/19 07:54:51 jmallett Exp $");
41
42#include <sys/param.h>
43#include <sys/stat.h>
44#include <sys/wait.h>
45
46#include <ctype.h>
47#include <err.h>
48#include <errno.h>
49#include <paths.h>
50#include <signal.h>
51#include <stdio.h>
52#include <stdlib.h>
53#include <string.h>
54#include <unistd.h>
55
56#include "extern.h"
57
58char *
59colon(char *cp)
60{
61 if (*cp == ':') /* Leading colon is part of file name. */
62 return (0);
63
64 for (; *cp; ++cp) {
65 if (*cp == ':')
66 return (cp);
67 if (*cp == '/')
68 return (0);
69 }
70 return (0);
71}
72
73void
74verifydir(char *cp)
75{
76 struct stat stb;
77
78 if (!stat(cp, &stb)) {
79 if (S_ISDIR(stb.st_mode))
80 return;
81 errno = ENOTDIR;
82 }
83 run_err("%s: %s", cp, strerror(errno));
84 exit(1);
85}
86
87int
88okname(char *cp0)
89{
90 int c;
91 char *cp;
92
93 cp = cp0;
94 do {
95 c = *cp;
96 if (c & 0200)
97 goto bad;
98 if (!isalpha(c) && !isdigit(c) && c != '_' && c != '-' && c != '.')
99 goto bad;
100 } while (*++cp);
101 return (1);
102
103bad: warnx("%s: invalid user name", cp0);
104 return (0);
105}
106
107int
108susystem(char *s, int userid)
109{
110 sig_t istat, qstat;
111 int status;
112 pid_t pid;
113
114 pid = vfork();
115 switch (pid) {
116 case -1:
117 return (127);
118
119 case 0:
120 (void)setuid(userid);
121 execl(_PATH_BSHELL, "sh", "-c", s, (char *)NULL);
122 _exit(127);
123 }
124 istat = signal(SIGINT, SIG_IGN);
125 qstat = signal(SIGQUIT, SIG_IGN);
126 if (waitpid(pid, &status, 0) < 0)
127 status = -1;
128 (void)signal(SIGINT, istat);
129 (void)signal(SIGQUIT, qstat);
130 return (status);
131}
132
133BUF *
134allocbuf(BUF *bp, int fd, int blksize)
135{
136 struct stat stb;
137 size_t size;
138
139 if (fstat(fd, &stb) < 0) {
140 run_err("fstat: %s", strerror(errno));
141 return (0);
142 }
143 size = roundup(stb.st_blksize, blksize);
144 if (size == 0)
145 size = blksize;
146 if (bp->cnt >= size)
147 return (bp);
148 if ((bp->buf = realloc(bp->buf, size)) == NULL) {
149 bp->cnt = 0;
150 run_err("%s", strerror(errno));
151 return (0);
152 }
153 bp->cnt = size;
154 return (bp);
155}
156
157void
158lostconn(int signo)
159{
160 if (!iamremote)
161 warnx("lost connection");
162 exit(1);
163}