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a873b449 | 1 | /*- |
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2 | * Copyright (c) 1992, 1993 |
3 | * The Regents of the University of California. All rights reserved. | |
a873b449 | 4 | * |
ad787160 C |
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. | |
a873b449 KB |
32 | */ |
33 | ||
34 | #ifndef lint | |
ad787160 | 35 | static char sccsid[] = "@(#)util.c 8.1 (Berkeley) 5/31/93"; |
a873b449 KB |
36 | #endif /* not lint */ |
37 | ||
38 | #include <sys/param.h> | |
39 | #include <sys/stat.h> | |
40 | #include <sys/wait.h> | |
41 | ||
d6fb15ad KB |
42 | #include <ctype.h> |
43 | #include <err.h> | |
a873b449 | 44 | #include <errno.h> |
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45 | #include <paths.h> |
46 | #include <signal.h> | |
a873b449 | 47 | #include <stdio.h> |
d6fb15ad | 48 | #include <stdlib.h> |
a873b449 | 49 | #include <string.h> |
d6fb15ad KB |
50 | #include <unistd.h> |
51 | ||
a873b449 KB |
52 | #include "extern.h" |
53 | ||
54 | char * | |
55 | colon(cp) | |
56 | register char *cp; | |
57 | { | |
ac59afe5 AC |
58 | if (*cp == ':') /* Leading colon is part of file name. */ |
59 | return (0); | |
60 | ||
a873b449 KB |
61 | for (; *cp; ++cp) { |
62 | if (*cp == ':') | |
63 | return (cp); | |
64 | if (*cp == '/') | |
65 | return (0); | |
66 | } | |
67 | return (0); | |
68 | } | |
69 | ||
70 | void | |
71 | verifydir(cp) | |
72 | char *cp; | |
73 | { | |
74 | struct stat stb; | |
75 | ||
76 | if (!stat(cp, &stb)) { | |
77 | if (S_ISDIR(stb.st_mode)) | |
78 | return; | |
79 | errno = ENOTDIR; | |
80 | } | |
d6fb15ad | 81 | run_err("%s: %s", cp, strerror(errno)); |
a873b449 KB |
82 | exit(1); |
83 | } | |
84 | ||
85 | int | |
86 | okname(cp0) | |
87 | char *cp0; | |
88 | { | |
89 | register int c; | |
90 | register char *cp; | |
91 | ||
92 | cp = cp0; | |
93 | do { | |
94 | c = *cp; | |
95 | if (c & 0200) | |
96 | goto bad; | |
97 | if (!isalpha(c) && !isdigit(c) && c != '_' && c != '-') | |
98 | goto bad; | |
99 | } while (*++cp); | |
100 | return (1); | |
101 | ||
d6fb15ad | 102 | bad: warnx("%s: invalid user name", cp0); |
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103 | return (0); |
104 | } | |
105 | ||
106 | int | |
107 | susystem(s, userid) | |
108 | int userid; | |
109 | char *s; | |
110 | { | |
111 | register sig_t istat, qstat; | |
112 | int status, pid, w; | |
113 | ||
114 | if ((pid = vfork()) == 0) { | |
115 | (void)setuid(userid); | |
116 | execl(_PATH_BSHELL, "sh", "-c", s, NULL); | |
117 | _exit(127); | |
118 | } | |
119 | istat = signal(SIGINT, SIG_IGN); | |
120 | qstat = signal(SIGQUIT, SIG_IGN); | |
121 | while ((w = wait(&status)) != pid && w != -1) | |
122 | ; | |
123 | if (w == -1) | |
124 | status = -1; | |
125 | (void)signal(SIGINT, istat); | |
126 | (void)signal(SIGQUIT, qstat); | |
127 | return (status); | |
128 | } | |
129 | ||
130 | BUF * | |
131 | allocbuf(bp, fd, blksize) | |
132 | BUF *bp; | |
133 | int fd, blksize; | |
134 | { | |
135 | struct stat stb; | |
136 | size_t size; | |
137 | ||
138 | if (fstat(fd, &stb) < 0) { | |
d6fb15ad | 139 | run_err("fstat: %s", strerror(errno)); |
a873b449 KB |
140 | return (0); |
141 | } | |
142 | size = roundup(stb.st_blksize, blksize); | |
143 | if (size == 0) | |
144 | size = blksize; | |
145 | if (bp->cnt >= size) | |
146 | return (bp); | |
147 | if ((bp->buf = realloc(bp->buf, size)) == NULL) { | |
148 | bp->cnt = 0; | |
d6fb15ad | 149 | run_err("%s", strerror(errno)); |
a873b449 KB |
150 | return (0); |
151 | } | |
152 | bp->cnt = size; | |
153 | return (bp); | |
154 | } | |
155 | ||
156 | void | |
157 | lostconn(signo) | |
158 | int signo; | |
159 | { | |
160 | if (!iamremote) | |
d6fb15ad | 161 | warnx("lost connection"); |
a873b449 KB |
162 | exit(1); |
163 | } |