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1 /*
2 * Copyright (c) 1999 Apple Computer, Inc. All rights reserved.
3 *
4 * @APPLE_LICENSE_HEADER_START@
5 *
6 * This file contains Original Code and/or Modifications of Original Code
7 * as defined in and that are subject to the Apple Public Source License
8 * Version 2.0 (the 'License'). You may not use this file except in
9 * compliance with the License. Please obtain a copy of the License at
10 * http://www.opensource.apple.com/apsl/ and read it before using this
11 * file.
12 *
13 * The Original Code and all software distributed under the License are
14 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
15 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
16 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
17 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
18 * Please see the License for the specific language governing rights and
19 * limitations under the License.
20 *
21 * @APPLE_LICENSE_HEADER_END@
22 */
23 /*-
24 * Copyright (c) 1992, 1993
25 * The Regents of the University of California. All rights reserved.
26 *
27 * Redistribution and use in source and binary forms, with or without
28 * modification, are permitted provided that the following conditions
29 * are met:
30 * 1. Redistributions of source code must retain the above copyright
31 * notice, this list of conditions and the following disclaimer.
32 * 2. Redistributions in binary form must reproduce the above copyright
33 * notice, this list of conditions and the following disclaimer in the
34 * documentation and/or other materials provided with the distribution.
35 * 3. All advertising materials mentioning features or use of this software
36 * must display the following acknowledgement:
37 * This product includes software developed by the University of
38 * California, Berkeley and its contributors.
39 * 4. Neither the name of the University nor the names of its contributors
40 * may be used to endorse or promote products derived from this software
41 * without specific prior written permission.
42 *
43 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
44 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
45 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
46 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
47 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
48 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
49 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
50 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
51 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
52 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
53 * SUCH DAMAGE.
54 */
55
56
57 #include <sys/param.h>
58 #include <sys/stat.h>
59 #include <sys/wait.h>
60
61 #include <ctype.h>
62 #include <err.h>
63 #include <errno.h>
64 #include <paths.h>
65 #include <signal.h>
66 #include <stdio.h>
67 #include <stdlib.h>
68 #include <string.h>
69 #include <unistd.h>
70
71 #include "extern.h"
72
73 char *
74 colon(cp)
75 char *cp;
76 {
77 if (*cp == ':') /* Leading colon is part of file name. */
78 return (0);
79
80 for (; *cp; ++cp) {
81 if (*cp == ':')
82 return (cp);
83 if (*cp == '/')
84 return (0);
85 }
86 return (0);
87 }
88
89 void
90 verifydir(cp)
91 char *cp;
92 {
93 struct stat stb;
94
95 if (!stat(cp, &stb)) {
96 if (S_ISDIR(stb.st_mode))
97 return;
98 errno = ENOTDIR;
99 }
100 run_err("%s: %s", cp, strerror(errno));
101 exit(1);
102 }
103
104 int
105 okname(cp0)
106 char *cp0;
107 {
108 int c;
109 char *cp;
110
111 cp = cp0;
112 do {
113 c = *cp;
114 if (c & 0200)
115 goto bad;
116 if (!isalpha(c) && !isdigit(c) && c != '_' && c != '-')
117 goto bad;
118 } while (*++cp);
119 return (1);
120
121 bad: warnx("%s: invalid user name", cp0);
122 return (0);
123 }
124
125 int
126 susystem(s, userid)
127 int userid;
128 char *s;
129 {
130 sig_t istat, qstat;
131 int status, w;
132 pid_t pid;
133
134 pid = vfork();
135 switch (pid) {
136 case -1:
137 return (127);
138
139 case 0:
140 (void)setuid(userid);
141 execl(_PATH_BSHELL, "sh", "-c", s, NULL);
142 _exit(127);
143 }
144 istat = signal(SIGINT, SIG_IGN);
145 qstat = signal(SIGQUIT, SIG_IGN);
146 if (waitpid(pid, &status, 0) < 0)
147 status = -1;
148 (void)signal(SIGINT, istat);
149 (void)signal(SIGQUIT, qstat);
150 return (status);
151 }
152
153 BUF *
154 allocbuf(bp, fd, blksize)
155 BUF *bp;
156 int fd, blksize;
157 {
158 struct stat stb;
159 size_t size;
160
161 if (fstat(fd, &stb) < 0) {
162 run_err("fstat: %s", strerror(errno));
163 return (0);
164 }
165 size = roundup(stb.st_blksize, blksize);
166 if (size == 0)
167 size = blksize;
168 if (bp->cnt >= size)
169 return (bp);
170 if ((bp->buf = realloc(bp->buf, size)) == NULL) {
171 bp->cnt = 0;
172 run_err("%s", strerror(errno));
173 return (0);
174 }
175 bp->cnt = size;
176 return (bp);
177 }
178
179 void
180 lostconn(signo)
181 int signo;
182 {
183 if (!iamremote)
184 warnx("lost connection");
185 exit(1);
186 }