1 /*-
2 * SPDX-License-Identifier: BSD-2-Clause
3 *
4 * Copyright (c) 2001, 2002 Dima Dorfman.
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * SUCH DAMAGE.
27 */
28
29 /*
30 * DEVFS control.
31 */
32
33 #include <sys/cdefs.h>
34 #include <sys/param.h>
35 #include <sys/queue.h>
36
37 #include <assert.h>
38 #include <err.h>
39 #include <fcntl.h>
40 #include <paths.h>
41 #include <stdio.h>
42 #include <stdint.h>
43 #include <stdlib.h>
44 #include <string.h>
45 #include <unistd.h>
46
47 #include "extern.h"
48
49 int mpfd;
50
51 static ctbl_t ctbl_main = {
52 { "rule", rule_main },
53 { "ruleset", ruleset_main },
54 { NULL, NULL }
55 };
56
57 int
main(int ac,char ** av)58 main(int ac, char **av)
59 {
60 const char *mountpt;
61 struct cmd *c;
62 int ch;
63
64 mountpt = NULL;
65 while ((ch = getopt(ac, av, "m:")) != -1)
66 switch (ch) {
67 case 'm':
68 mountpt = optarg;
69 break;
70 default:
71 usage();
72 }
73 ac -= optind;
74 av += optind;
75 if (ac < 1)
76 usage();
77
78 if (mountpt == NULL)
79 mountpt = _PATH_DEV;
80 mpfd = open(mountpt, O_RDONLY);
81 if (mpfd == -1)
82 err(1, "open: %s", mountpt);
83
84 for (c = ctbl_main; c->name != NULL; ++c)
85 if (strcmp(c->name, av[0]) == 0)
86 exit((*c->handler)(ac, av));
87 errx(1, "unknown command: %s", av[0]);
88 }
89
90 /*
91 * Convert an integer to a "number" (ruleset numbers and rule numbers
92 * are 16-bit). If the conversion is successful, num contains the
93 * integer representation of s and 1 is returned; otherwise, 0 is
94 * returned and num is unchanged.
95 */
96 int
atonum(const char * s,uint16_t * num)97 atonum(const char *s, uint16_t *num)
98 {
99 unsigned long ul;
100 char *cp;
101
102 ul = strtoul(s, &cp, 10);
103 if (ul > UINT16_MAX || *cp != '\0')
104 return (0);
105 *num = (uint16_t)ul;
106 return (1);
107 }
108
109 /*
110 * Convert user input in ASCII to an integer.
111 */
112 int
eatoi(const char * s)113 eatoi(const char *s)
114 {
115 char *cp;
116 long l;
117
118 l = strtol(s, &cp, 10);
119 if (l > INT_MAX || *cp != '\0')
120 errx(1, "error converting to integer: %s", s);
121 return ((int)l);
122 }
123
124 /*
125 * As atonum(), but the result of failure is death.
126 */
127 uint16_t
eatonum(const char * s)128 eatonum(const char *s)
129 {
130 uint16_t num;
131
132 if (!atonum(s, &num))
133 errx(1, "error converting to number: %s", s); /* XXX clarify */
134 return (num);
135 }
136
137 /*
138 * Read a line from a /FILE/. If the return value isn't 0, it is the
139 * length of the line, a pointer to which exists in /line/. It is the
140 * caller's responsibility to free(3) it. If the return value is 0,
141 * there was an error or we reached EOF, and /line/ is undefined (so,
142 * obviously, the caller shouldn't try to free(3) it).
143 */
144 size_t
efgetln(FILE * fp,char ** line)145 efgetln(FILE *fp, char **line)
146 {
147 size_t rv;
148 char *cp;
149
150 cp = fgetln(fp, &rv);
151 if (cp == NULL) {
152 *line = NULL;
153 return (rv);
154 }
155 if (cp[rv - 1] == '\n') {
156 cp[rv - 1] = '\0';
157 *line = strdup(cp);
158 if (*line == NULL)
159 errx(1, "cannot allocate memory");
160 --rv;
161 } else {
162 *line = malloc(rv + 1);
163 if (*line == NULL)
164 errx(1, "cannot allocate memory");
165 memcpy(*line, cp, rv);
166 (*line)[rv] = '\0';
167 }
168 assert(rv == strlen(*line));
169 return (rv);
170 }
171
172 struct ptrstq {
173 STAILQ_ENTRY(ptrstq) tq;
174 void *ptr;
175 };
176
177 /*
178 * Create an argument vector from /line/. The caller must free(3)
179 * /avp/, and /avp[0]/ when the argument vector is no longer
180 * needed unless /acp/ is 0, in which case /avp/ is undefined.
181 * /avp/ is NULL-terminated, so it is actually one longer than /acp/.
182 */
183 void
tokenize(const char * line,int * acp,char *** avp)184 tokenize(const char *line, int *acp, char ***avp)
185 {
186 static const char *delims = " \t\n";
187 struct ptrstq *pt;
188 STAILQ_HEAD(, ptrstq) plist;
189 char **ap, *cp, *wline, *xcp;
190
191 line += strspn(line, delims);
192 wline = strdup(line);
193 if (wline == NULL)
194 errx(1, "cannot allocate memory");
195
196 STAILQ_INIT(&plist);
197 for (xcp = wline, *acp = 0;
198 (cp = strsep(&xcp, delims)) != NULL;)
199 if (*cp != '\0') {
200 pt = calloc(1, sizeof(*pt));
201 if (pt == NULL)
202 errx(1, "cannot allocate memory");
203 pt->ptr = cp;
204 STAILQ_INSERT_TAIL(&plist, pt, tq);
205 ++*acp;
206 }
207 if (*acp == 0)
208 return;
209 assert(STAILQ_FIRST(&plist)->ptr == wline);
210 *avp = malloc(sizeof(**avp) * (*acp + 1));
211 if (*avp == NULL)
212 errx(1, "cannot allocate memory");
213 for (ap = *avp; !STAILQ_EMPTY(&plist);) {
214 pt = STAILQ_FIRST(&plist);
215 *ap = pt->ptr;
216 ++ap;
217 assert(ap <= *avp + (*acp));
218 STAILQ_REMOVE_HEAD(&plist, tq);
219 free(pt);
220 }
221 *ap = NULL;
222 }
223
224 void
usage(void)225 usage(void)
226 {
227
228 fprintf(stderr, "usage: %s\n%s\n",
229 "\tdevfs [-m mount-point] rule [-s ruleset] ...",
230 "\tdevfs [-m mount-point] ruleset ...");
231 exit(1);
232 }
233