FreeBSD-5.3/sbin/devfs/rule.c
/*-
* Copyright (c) 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.
*/
/*
* Rule subsystem manipulation.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD: src/sbin/devfs/rule.c,v 1.5 2004/01/22 07:23:35 grehan Exp $");
#include <sys/param.h>
#include <sys/conf.h>
#include <sys/ioctl.h>
#include <assert.h>
#include <err.h>
#include <errno.h>
#include <grp.h>
#include <pwd.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include "extern.h"
static void rulespec_infp(FILE *fp, unsigned long reqest, devfs_rsnum rsnum);
static void rulespec_instr(struct devfs_rule *dr, const char *str,
devfs_rsnum rsnum);
static void rulespec_intok(struct devfs_rule *dr, int ac, char **av,
devfs_rsnum rsnum);
static void rulespec_outfp(FILE *fp, struct devfs_rule *dr);
static command_t rule_add, rule_apply, rule_applyset;
static command_t rule_del, rule_delset, rule_show, rule_showsets;
static ctbl_t ctbl_rule = {
{ "add", rule_add },
{ "apply", rule_apply },
{ "applyset", rule_applyset },
{ "del", rule_del },
{ "delset", rule_delset },
{ "show", rule_show },
{ "showsets", rule_showsets },
{ NULL, NULL }
};
static struct intstr ist_type[] = {
{ "disk", D_DISK },
{ "mem", D_MEM },
{ "tape", D_TAPE },
{ "tty", D_TTY },
{ NULL, -1 }
};
devfs_rsnum in_rsnum;
int
rule_main(int ac, char **av)
{
struct cmd *c;
int ch;
setprogname("devfs rule");
optreset = optind = 1;
while ((ch = getopt(ac, av, "s:")) != -1)
switch (ch) {
case 's':
in_rsnum = eatonum(optarg);
break;
default:
usage();
}
ac -= optind;
av += optind;
if (ac < 1)
usage();
for (c = ctbl_rule; c->name != NULL; ++c)
if (strcmp(c->name, av[0]) == 0)
exit((*c->handler)(ac, av));
errx(1, "unknown command: %s", av[0]);
}
static int
rule_add(int ac, char **av)
{
struct devfs_rule dr;
int rv;
if (ac < 2)
usage();
if (strcmp(av[1], "-") == 0)
rulespec_infp(stdin, DEVFSIO_RADD, in_rsnum);
else {
rulespec_intok(&dr, ac - 1, av + 1, in_rsnum);
rv = ioctl(mpfd, DEVFSIO_RADD, &dr);
if (rv == -1)
err(1, "ioctl DEVFSIO_RADD");
}
return (0);
}
static int
rule_apply(int ac __unused, char **av __unused)
{
struct devfs_rule dr;
devfs_rnum rnum;
devfs_rid rid;
int rv;
if (ac < 2)
usage();
if (!atonum(av[1], &rnum)) {
if (strcmp(av[1], "-") == 0)
rulespec_infp(stdin, DEVFSIO_RAPPLY, in_rsnum);
else {
rulespec_intok(&dr, ac - 1, av + 1, in_rsnum);
rv = ioctl(mpfd, DEVFSIO_RAPPLY, &dr);
if (rv == -1)
err(1, "ioctl DEVFSIO_RAPPLY");
}
} else {
rid = mkrid(in_rsnum, rnum);
rv = ioctl(mpfd, DEVFSIO_RAPPLYID, &rid);
if (rv == -1)
err(1, "ioctl DEVFSIO_RAPPLYID");
}
return (0);
}
static int
rule_applyset(int ac, char **av __unused)
{
int rv;
if (ac != 1)
usage();
rv = ioctl(mpfd, DEVFSIO_SAPPLY, &in_rsnum);
if (rv == -1)
err(1, "ioctl DEVFSIO_SAPPLY");
return (0);
}
static int
rule_del(int ac __unused, char **av)
{
devfs_rid rid;
int rv;
if (av[1] == NULL)
usage();
rid = mkrid(in_rsnum, eatoi(av[1]));
rv = ioctl(mpfd, DEVFSIO_RDEL, &rid);
if (rv == -1)
err(1, "ioctl DEVFSIO_RDEL");
return (0);
}
static int
rule_delset(int ac, char **av __unused)
{
struct devfs_rule dr;
int rv;
if (ac != 1)
usage();
memset(&dr, '\0', sizeof(dr));
dr.dr_magic = DEVFS_MAGIC;
dr.dr_id = mkrid(in_rsnum, 0);
while (ioctl(mpfd, DEVFSIO_RGETNEXT, &dr) != -1) {
rv = ioctl(mpfd, DEVFSIO_RDEL, &dr.dr_id);
if (rv == -1)
err(1, "ioctl DEVFSIO_RDEL");
}
if (errno != ENOENT)
err(1, "ioctl DEVFSIO_RGETNEXT");
return (0);
}
static int
rule_show(int ac __unused, char **av)
{
struct devfs_rule dr;
devfs_rnum rnum;
int rv;
memset(&dr, '\0', sizeof(dr));
dr.dr_magic = DEVFS_MAGIC;
if (av[1] != NULL) {
rnum = eatoi(av[1]);
dr.dr_id = mkrid(in_rsnum, rnum - 1);
rv = ioctl(mpfd, DEVFSIO_RGETNEXT, &dr);
if (rv == -1)
err(1, "ioctl DEVFSIO_RGETNEXT");
if (rid2rn(dr.dr_id) == rnum)
rulespec_outfp(stdout, &dr);
} else {
dr.dr_id = mkrid(in_rsnum, 0);
while (ioctl(mpfd, DEVFSIO_RGETNEXT, &dr) != -1)
rulespec_outfp(stdout, &dr);
if (errno != ENOENT)
err(1, "ioctl DEVFSIO_RGETNEXT");
}
return (0);
}
static int
rule_showsets(int ac, char **av __unused)
{
devfs_rsnum rsnum;
if (ac != 1)
usage();
rsnum = 0;
while (ioctl(mpfd, DEVFSIO_SGETNEXT, &rsnum) != -1)
printf("%d\n", rsnum);
if (errno != ENOENT)
err(1, "ioctl DEVFSIO_SGETNEXT");
return (0);
}
int
ruleset_main(int ac, char **av)
{
devfs_rsnum rsnum;
int rv;
setprogname("devfs ruleset");
if (ac < 2)
usage();
rsnum = eatonum(av[1]);
rv = ioctl(mpfd, DEVFSIO_SUSE, &rsnum);
if (rv == -1)
err(1, "ioctl DEVFSIO_SUSE");
return (0);
}
/*
* Input rules from a file (probably the standard input). This
* differs from the other rulespec_in*() routines in that it also
* calls ioctl() for the rules, since it is impractical (and not very
* useful) to return a list (or array) of rules, just so the caller
* can call call ioctl() for each of them.
*/
static void
rulespec_infp(FILE *fp, unsigned long request, devfs_rsnum rsnum)
{
struct devfs_rule dr;
char *line;
int rv;
assert(fp == stdin); /* XXX: De-hardcode "stdin" from error msg. */
while (efgetln(fp, &line)) {
rulespec_instr(&dr, line, rsnum);
rv = ioctl(mpfd, request, &dr);
if (rv == -1)
err(1, "ioctl");
free(line); /* efgetln() always malloc()s. */
}
if (ferror(stdin))
err(1, "stdin");
}
/*
* Construct a /struct devfs_rule/ from a string.
*/
static void
rulespec_instr(struct devfs_rule *dr, const char *str, devfs_rsnum rsnum)
{
char **av;
int ac;
tokenize(str, &ac, &av);
if (ac == 0)
errx(1, "unexpected end of rulespec");
rulespec_intok(dr, ac, av, rsnum);
free(av[0]);
free(av);
}
/*
* Construct a /struct devfs_rule/ from ac and av.
*/
static void
rulespec_intok(struct devfs_rule *dr, int ac __unused, char **av,
devfs_rsnum rsnum)
{
struct intstr *is;
struct passwd *pw;
struct group *gr;
devfs_rnum rnum;
char *cp;
long l;
memset(dr, '\0', sizeof(*dr));
/*
* We don't maintain ac hereinafter.
*/
if (av[0] == NULL)
errx(1, "unexpected end of rulespec");
/* If the first argument is an integer, treat it as a rule number. */
if (!atonum(av[0], &rnum))
rnum = 0; /* auto-number */
else
++av;
/*
* These aren't table-driven since that would result in more
* tiny functions than I care to deal with.
*/
for (;;) {
if (av[0] == NULL)
break;
else if (strcmp(av[0], "type") == 0) {
if (av[1] == NULL)
errx(1, "expecting argument for type");
for (is = ist_type; is->s != NULL; ++is)
if (strcmp(av[1], is->s) == 0) {
dr->dr_dswflags |= is->i;
break;
}
if (is->s == NULL)
errx(1, "unknown type: %s", av[1]);
dr->dr_icond |= DRC_DSWFLAGS;
av += 2;
} else if (strcmp(av[0], "path") == 0) {
if (av[1] == NULL)
errx(1, "expecting argument for path");
if (strlcpy(dr->dr_pathptrn, av[1], DEVFS_MAXPTRNLEN)
>= DEVFS_MAXPTRNLEN)
warnx("pattern specified too long; truncated");
dr->dr_icond |= DRC_PATHPTRN;
av += 2;
} else if (strcmp(av[0], "major") == 0) {
if (av[1] == NULL)
errx(1, "expecting argument for major");
dr->dr_major = eatoi(av[1]);
dr->dr_icond |= DRC_MAJOR;
av += 2;
} else
break;
}
for (;;) {
if (av[0] == NULL)
break;
else if (strcmp(av[0], "hide") == 0) {
dr->dr_iacts |= DRA_BACTS;
dr->dr_bacts |= DRB_HIDE;
++av;
} else if (strcmp(av[0], "unhide") == 0) {
dr->dr_iacts |= DRA_BACTS;
dr->dr_bacts |= DRB_UNHIDE;
++av;
} else if (strcmp(av[0], "user") == 0) {
if (av[1] == NULL)
errx(1, "expecting argument for user");
dr->dr_iacts |= DRA_UID;
pw = getpwnam(av[1]);
if (pw != NULL)
dr->dr_uid = pw->pw_uid;
else
dr->dr_uid = eatoi(av[1]); /* XXX overflow */
av += 2;
} else if (strcmp(av[0], "group") == 0) {
if (av[1] == NULL)
errx(1, "expecting argument for group");
dr->dr_iacts |= DRA_GID;
gr = getgrnam(av[1]);
if (gr != NULL)
dr->dr_gid = gr->gr_gid;
else
dr->dr_gid = eatoi(av[1]); /* XXX overflow */
av += 2;
} else if (strcmp(av[0], "mode") == 0) {
if (av[1] == NULL)
errx(1, "expecting argument for mode");
dr->dr_iacts |= DRA_MODE;
l = strtol(av[1], &cp, 8);
if (l > (1 << (sizeof(dr->dr_mode) * 8)) - 1 ||
*cp != '\0')
errx(1, "invalid mode: %s", av[1]);
dr->dr_mode = l;
av += 2;
} else if (strcmp(av[0], "include") == 0) {
if (av[1] == NULL)
errx(1, "expecting argument for include");
dr->dr_iacts |= DRA_INCSET;
dr->dr_incset = eatonum(av[1]);
av += 2;
} else
errx(1, "unknown argument: %s", av[0]);
}
dr->dr_id = mkrid(rsnum, rnum);
dr->dr_magic = DEVFS_MAGIC;
}
/*
* Write a human-readable (and machine-parsable, by rulespec_in*())
* representation of dr to bufp. *bufp should be free(3)'d when the
* caller is finished with it.
*/
static void
rulespec_outfp(FILE *fp, struct devfs_rule *dr)
{
struct intstr *is;
struct passwd *pw;
struct group *gr;
fprintf(fp, "%d", rid2rn(dr->dr_id));
if (dr->dr_icond & DRC_DSWFLAGS)
for (is = ist_type; is->s != NULL; ++is)
if (dr->dr_dswflags & is->i)
fprintf(fp, " type %s", is->s);
if (dr->dr_icond & DRC_PATHPTRN)
fprintf(fp, " path %s", dr->dr_pathptrn);
if (dr->dr_icond & DRC_MAJOR)
fprintf(fp, " major %d", dr->dr_major);
if (dr->dr_iacts & DRA_BACTS) {
if (dr->dr_bacts & DRB_HIDE)
fprintf(fp, " hide");
if (dr->dr_bacts & DRB_UNHIDE)
fprintf(fp, " unhide");
}
if (dr->dr_iacts & DRA_UID) {
pw = getpwuid(dr->dr_uid);
if (pw == NULL)
fprintf(fp, " user %d", dr->dr_uid);
else
fprintf(fp, " user %s", pw->pw_name);
}
if (dr->dr_iacts & DRA_GID) {
gr = getgrgid(dr->dr_gid);
if (gr == NULL)
fprintf(fp, " group %d", dr->dr_gid);
else
fprintf(fp, " group %s", gr->gr_name);
}
if (dr->dr_iacts & DRA_MODE)
fprintf(fp, " mode %o", dr->dr_mode);
if (dr->dr_iacts & DRA_INCSET)
fprintf(fp, " include %d", dr->dr_incset);
fprintf(fp, "\n");
}