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/*-
* Copyright (c) 2001, 2002 Dima Dorfman.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
/*
* DEVFS control.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/param.h>
#include <sys/queue.h>
#include <assert.h>
#include <err.h>
#include <fcntl.h>
#include <paths.h>
#include <stdio.h>
#include <stdint.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include "extern.h"
int mpfd;
static ctbl_t ctbl_main = {
{ "rule", rule_main },
{ "ruleset", ruleset_main },
{ NULL, NULL }
};
int
main(int ac, char **av)
{
const char *mountpt;
struct cmd *c;
int ch;
mountpt = NULL;
while ((ch = getopt(ac, av, "m:")) != -1)
switch (ch) {
case 'm':
mountpt = optarg;
break;
default:
usage();
}
ac -= optind;
av += optind;
if (ac < 1)
usage();
if (mountpt == NULL)
mountpt = _PATH_DEV;
mpfd = open(mountpt, O_RDONLY);
if (mpfd == -1)
err(1, "open: %s", mountpt);
for (c = ctbl_main; c->name != NULL; ++c)
if (strcmp(c->name, av[0]) == 0)
exit((*c->handler)(ac, av));
errx(1, "unknown command: %s", av[0]);
}
/*
* Convert an integer to a "number" (ruleset numbers and rule numbers
* are 16-bit). If the conversion is successful, num contains the
* integer representation of s and 1 is returned; otherwise, 0 is
* returned and num is unchanged.
*/
int
atonum(const char *s, uint16_t *num)
{
unsigned long ul;
char *cp;
ul = strtoul(s, &cp, 10);
if (ul > UINT16_MAX || *cp != '\0')
return (0);
*num = (uint16_t)ul;
return (1);
}
/*
* Convert user input in ASCII to an integer.
*/
int
eatoi(const char *s)
{
char *cp;
long l;
l = strtol(s, &cp, 10);
if (l > INT_MAX || *cp != '\0')
errx(1, "error converting to integer: %s", s);
return ((int)l);
}
/*
* As atonum(), but the result of failure is death.
*/
uint16_t
eatonum(const char *s)
{
uint16_t num;
if (!atonum(s, &num))
errx(1, "error converting to number: %s", s); /* XXX clarify */
return (num);
}
/*
* Read a line from a /FILE/. If the return value isn't 0, it is the
* length of the line, a pointer to which exists in /line/. It is the
* caller's responsibility to free(3) it. If the return value is 0,
* there was an error or we reached EOF, and /line/ is undefined (so,
* obviously, the caller shouldn't try to free(3) it).
*/
size_t
efgetln(FILE *fp, char **line)
{
size_t rv;
char *cp;
cp = fgetln(fp, &rv);
if (cp == NULL) {
*line = NULL;
return (rv);
}
if (cp[rv - 1] == '\n') {
cp[rv - 1] = '\0';
*line = strdup(cp);
if (*line == NULL)
errx(1, "cannot allocate memory");
--rv;
} else {
*line = malloc(rv + 1);
if (*line == NULL)
errx(1, "cannot allocate memory");
memcpy(*line, cp, rv);
(*line)[rv] = '\0';
}
assert(rv == strlen(*line));
return (rv);
}
struct ptrstq {
STAILQ_ENTRY(ptrstq) tq;
void *ptr;
};
/*
* Create an argument vector from /line/. The caller must free(3)
* /avp/, and /avp[0]/ when the argument vector is no longer
* needed unless /acp/ is 0, in which case /avp/ is undefined.
* /avp/ is NULL-terminated, so it is actually one longer than /acp/.
*/
void
tokenize(const char *line, int *acp, char ***avp)
{
static const char *delims = " \t\n";
struct ptrstq *pt;
STAILQ_HEAD(, ptrstq) plist;
char **ap, *cp, *wline, *xcp;
line += strspn(line, delims);
wline = strdup(line);
if (wline == NULL)
errx(1, "cannot allocate memory");
STAILQ_INIT(&plist);
for (xcp = wline, *acp = 0;
(cp = strsep(&xcp, delims)) != NULL;)
if (*cp != '\0') {
pt = calloc(1, sizeof(*pt));
if (pt == NULL)
errx(1, "cannot allocate memory");
pt->ptr = cp;
STAILQ_INSERT_TAIL(&plist, pt, tq);
++*acp;
}
if (*acp == 0)
return;
assert(STAILQ_FIRST(&plist)->ptr == wline);
*avp = malloc(sizeof(**avp) * (*acp + 1));
if (*avp == NULL)
errx(1, "cannot allocate memory");
for (ap = *avp; !STAILQ_EMPTY(&plist);) {
pt = STAILQ_FIRST(&plist);
*ap = pt->ptr;
++ap;
assert(ap <= *avp + (*acp));
STAILQ_REMOVE_HEAD(&plist, tq);
free(pt);
}
*ap = NULL;
}
void
usage(void)
{
fprintf(stderr, "usage: devfs rule|ruleset arguments\n");
exit(1);
}
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