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freebsd/usr.sbin/jls/jls.c
Jamie Gritton b2ea411de2 Allow for parameters added with the JP_OPT flag to not exist. 
That's why the flag exists in the first place.

MFC after:	1 week
2015-02-22 00:00:10 +00:00

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/*-
* Copyright (c) 2003 Mike Barcroft <mike@FreeBSD.org>
* Copyright (c) 2008 Bjoern A. Zeeb <bz@FreeBSD.org>
* Copyright (c) 2009 James Gritton <jamie@FreeBSD.org>
* 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.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/param.h>
#include <sys/jail.h>
#include <sys/socket.h>
#include <sys/sysctl.h>
#include <arpa/inet.h>
#include <netinet/in.h>
#include <err.h>
#include <errno.h>
#include <jail.h>
#include <limits.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#define JP_USER 0x01000000
#define JP_OPT 0x02000000
#define PRINT_DEFAULT 0x01
#define PRINT_HEADER 0x02
#define PRINT_NAMEVAL 0x04
#define PRINT_QUOTED 0x08
#define PRINT_SKIP 0x10
#define PRINT_VERBOSE 0x20
#define PRINT_JAIL_NAME 0x40
static struct jailparam *params;
static int *param_parent;
static int nparams;
#ifdef INET6
static int ip6_ok;
#endif
#ifdef INET
static int ip4_ok;
#endif
static int add_param(const char *name, void *value, size_t valuelen,
struct jailparam *source, unsigned flags);
static int sort_param(const void *a, const void *b);
static char *noname(const char *name);
static char *nononame(const char *name);
static int print_jail(int pflags, int jflags);
static void quoted_print(char *str);
int
main(int argc, char **argv)
{
char *dot, *ep, *jname, *pname;
int c, i, jflags, jid, lastjid, pflags, spc;
jname = NULL;
pflags = jflags = jid = 0;
while ((c = getopt(argc, argv, "adj:hNnqsv")) >= 0)
switch (c) {
case 'a':
case 'd':
jflags |= JAIL_DYING;
break;
case 'j':
jid = strtoul(optarg, &ep, 10);
if (!jid || *ep) {
jid = 0;
jname = optarg;
}
break;
case 'h':
pflags = (pflags & ~(PRINT_SKIP | PRINT_VERBOSE)) |
PRINT_HEADER;
break;
case 'N':
pflags |= PRINT_JAIL_NAME;
break;
case 'n':
pflags = (pflags & ~PRINT_VERBOSE) | PRINT_NAMEVAL;
break;
case 'q':
pflags |= PRINT_QUOTED;
break;
case 's':
pflags = (pflags & ~(PRINT_HEADER | PRINT_VERBOSE)) |
PRINT_NAMEVAL | PRINT_QUOTED | PRINT_SKIP;
break;
case 'v':
pflags = (pflags &
~(PRINT_HEADER | PRINT_NAMEVAL | PRINT_SKIP)) |
PRINT_VERBOSE;
break;
default:
errx(1, "usage: jls [-dhNnqv] [-j jail] [param ...]");
}
#ifdef INET6
ip6_ok = feature_present("inet6");
#endif
#ifdef INET
ip4_ok = feature_present("inet");
#endif
/* Add the parameters to print. */
if (optind == argc) {
if (pflags & (PRINT_HEADER | PRINT_NAMEVAL))
add_param("all", NULL, (size_t)0, NULL, JP_USER);
else if (pflags & PRINT_VERBOSE) {
add_param("jid", NULL, (size_t)0, NULL, JP_USER);
add_param("host.hostname", NULL, (size_t)0, NULL,
JP_USER);
add_param("path", NULL, (size_t)0, NULL, JP_USER);
add_param("name", NULL, (size_t)0, NULL, JP_USER);
add_param("dying", NULL, (size_t)0, NULL, JP_USER);
add_param("cpuset.id", NULL, (size_t)0, NULL, JP_USER);
#ifdef INET
if (ip4_ok)
add_param("ip4.addr", NULL, (size_t)0, NULL,
JP_USER);
#endif
#ifdef INET6
if (ip6_ok)
add_param("ip6.addr", NULL, (size_t)0, NULL,
JP_USER | JP_OPT);
#endif
} else {
pflags |= PRINT_DEFAULT;
if (pflags & PRINT_JAIL_NAME)
add_param("name", NULL, (size_t)0, NULL, JP_USER);
else
add_param("jid", NULL, (size_t)0, NULL, JP_USER);
#ifdef INET
if (ip4_ok)
add_param("ip4.addr", NULL, (size_t)0, NULL,
JP_USER);
#endif
add_param("host.hostname", NULL, (size_t)0, NULL,
JP_USER);
add_param("path", NULL, (size_t)0, NULL, JP_USER);
}
} else {
pflags &= ~PRINT_VERBOSE;
while (optind < argc)
add_param(argv[optind++], NULL, (size_t)0, NULL,
JP_USER);
}
if (pflags & PRINT_SKIP) {
/* Check for parameters with jailsys parents. */
for (i = 0; i < nparams; i++) {
if ((params[i].jp_flags & JP_USER) &&
(dot = strchr(params[i].jp_name, '.'))) {
pname = alloca((dot - params[i].jp_name) + 1);
strlcpy(pname, params[i].jp_name,
(dot - params[i].jp_name) + 1);
param_parent[i] = add_param(pname,
NULL, (size_t)0, NULL, JP_OPT);
}
}
}
/* Add the index key parameters. */
if (jid != 0)
add_param("jid", &jid, sizeof(jid), NULL, 0);
else if (jname != NULL)
add_param("name", jname, strlen(jname), NULL, 0);
else
add_param("lastjid", &lastjid, sizeof(lastjid), NULL, 0);
/* Print a header line if requested. */
if (pflags & PRINT_VERBOSE)
printf(" JID Hostname Path\n"
" Name State\n"
" CPUSetID\n"
" IP Address(es)\n");
else if (pflags & PRINT_DEFAULT)
if (pflags & PRINT_JAIL_NAME)
printf(" JID IP Address "
"Hostname Path\n");
else
printf(" JID IP Address "
"Hostname Path\n");
else if (pflags & PRINT_HEADER) {
for (i = spc = 0; i < nparams; i++)
if (params[i].jp_flags & JP_USER) {
if (spc)
putchar(' ');
else
spc = 1;
fputs(params[i].jp_name, stdout);
}
putchar('\n');
}
/* Fetch the jail(s) and print the paramters. */
if (jid != 0 || jname != NULL) {
if (print_jail(pflags, jflags) < 0)
errx(1, "%s", jail_errmsg);
} else {
for (lastjid = 0;
(lastjid = print_jail(pflags, jflags)) >= 0; )
;
if (errno != 0 && errno != ENOENT)
errx(1, "%s", jail_errmsg);
}
return (0);
}
static int
add_param(const char *name, void *value, size_t valuelen,
struct jailparam *source, unsigned flags)
{
struct jailparam *param, *tparams;
int i, tnparams;
static int paramlistsize;
/* The pseudo-parameter "all" scans the list of available parameters. */
if (!strcmp(name, "all")) {
tnparams = jailparam_all(&tparams);
if (tnparams < 0)
errx(1, "%s", jail_errmsg);
qsort(tparams, (size_t)tnparams, sizeof(struct jailparam),
sort_param);
for (i = 0; i < tnparams; i++)
add_param(tparams[i].jp_name, NULL, (size_t)0,
tparams + i, flags);
free(tparams);
return -1;
}
/* Check for repeat parameters. */
for (i = 0; i < nparams; i++)
if (!strcmp(name, params[i].jp_name)) {
if (value != NULL && jailparam_import_raw(params + i,
value, valuelen) < 0)
errx(1, "%s", jail_errmsg);
params[i].jp_flags |= flags;
if (source != NULL)
jailparam_free(source, 1);
return i;
}
/* Make sure there is room for the new param record. */
if (!nparams) {
paramlistsize = 32;
params = malloc(paramlistsize * sizeof(*params));
param_parent = malloc(paramlistsize * sizeof(*param_parent));
if (params == NULL || param_parent == NULL)
err(1, "malloc");
} else if (nparams >= paramlistsize) {
paramlistsize *= 2;
params = realloc(params, paramlistsize * sizeof(*params));
param_parent = realloc(param_parent,
paramlistsize * sizeof(*param_parent));
if (params == NULL || param_parent == NULL)
err(1, "realloc");
}
/* Look up the parameter. */
param_parent[nparams] = -1;
param = params + nparams++;
if (source != NULL) {
*param = *source;
param->jp_flags |= flags;
return param - params;
}
if (jailparam_init(param, name) < 0 ||
(value != NULL ? jailparam_import_raw(param, value, valuelen)
: jailparam_import(param, value)) < 0) {
if (flags & JP_OPT) {
nparams--;
return (-1);
}
errx(1, "%s", jail_errmsg);
}
param->jp_flags = flags;
return param - params;
}
static int
sort_param(const void *a, const void *b)
{
const struct jailparam *parama, *paramb;
char *ap, *bp;
/* Put top-level parameters first. */
parama = a;
paramb = b;
ap = strchr(parama->jp_name, '.');
bp = strchr(paramb->jp_name, '.');
if (ap && !bp)
return (1);
if (bp && !ap)
return (-1);
return (strcmp(parama->jp_name, paramb->jp_name));
}
static char *
noname(const char *name)
{
char *nname, *p;
nname = malloc(strlen(name) + 3);
if (nname == NULL)
err(1, "malloc");
p = strrchr(name, '.');
if (p != NULL)
sprintf(nname, "%.*s.no%s", (int)(p - name), name, p + 1);
else
sprintf(nname, "no%s", name);
return nname;
}
static char *
nononame(const char *name)
{
char *nname, *p;
p = strrchr(name, '.');
if (strncmp(p ? p + 1 : name, "no", 2))
return NULL;
nname = malloc(strlen(name) - 1);
if (nname == NULL)
err(1, "malloc");
if (p != NULL)
sprintf(nname, "%.*s.%s", (int)(p - name), name, p + 3);
else
strcpy(nname, name + 2);
return nname;
}
static int
print_jail(int pflags, int jflags)
{
char *nname;
char **param_values;
int i, ai, jid, count, n, spc;
char ipbuf[INET6_ADDRSTRLEN];
jid = jailparam_get(params, nparams, jflags);
if (jid < 0)
return jid;
if (pflags & PRINT_VERBOSE) {
printf("%6d %-29.29s %.74s\n"
"%6s %-29.29s %.74s\n"
"%6s %-6d\n",
*(int *)params[0].jp_value,
(char *)params[1].jp_value,
(char *)params[2].jp_value,
"",
(char *)params[3].jp_value,
*(int *)params[4].jp_value ? "DYING" : "ACTIVE",
"",
*(int *)params[5].jp_value);
n = 6;
#ifdef INET
if (ip4_ok && !strcmp(params[n].jp_name, "ip4.addr")) {
count = params[n].jp_valuelen / sizeof(struct in_addr);
for (ai = 0; ai < count; ai++)
if (inet_ntop(AF_INET,
&((struct in_addr *)params[n].jp_value)[ai],
ipbuf, sizeof(ipbuf)) == NULL)
err(1, "inet_ntop");
else
printf("%6s %-15.15s\n", "", ipbuf);
n++;
}
#endif
#ifdef INET6
if (ip6_ok && !strcmp(params[n].jp_name, "ip6.addr")) {
count = params[n].jp_valuelen / sizeof(struct in6_addr);
for (ai = 0; ai < count; ai++)
if (inet_ntop(AF_INET6,
&((struct in6_addr *)
params[n].jp_value)[ai],
ipbuf, sizeof(ipbuf)) == NULL)
err(1, "inet_ntop");
else
printf("%6s %s\n", "", ipbuf);
n++;
}
#endif
} else if (pflags & PRINT_DEFAULT) {
if (pflags & PRINT_JAIL_NAME)
printf(" %-15s ", (char *)params[0].jp_value);
else
printf("%6d ", *(int *)params[0].jp_value);
printf("%-15.15s %-29.29s %.74s\n",
#ifdef INET
(!ip4_ok || params[1].jp_valuelen == 0) ? "-"
: inet_ntoa(*(struct in_addr *)params[1].jp_value),
(char *)params[2-!ip4_ok].jp_value,
(char *)params[3-!ip4_ok].jp_value);
#else
"-",
(char *)params[1].jp_value,
(char *)params[2].jp_value);
#endif
} else {
param_values = alloca(nparams * sizeof(*param_values));
for (i = 0; i < nparams; i++) {
if (!(params[i].jp_flags & JP_USER))
continue;
param_values[i] = jailparam_export(params + i);
if (param_values[i] == NULL)
errx(1, "%s", jail_errmsg);
}
for (i = spc = 0; i < nparams; i++) {
if (!(params[i].jp_flags & JP_USER))
continue;
if ((pflags & PRINT_SKIP) &&
((!(params[i].jp_ctltype &
(CTLFLAG_WR | CTLFLAG_TUN))) ||
(param_parent[i] >= 0 &&
*(int *)params[param_parent[i]].jp_value !=
JAIL_SYS_NEW)))
continue;
if (spc)
putchar(' ');
else
spc = 1;
if (pflags & PRINT_NAMEVAL) {
/*
* Generally "name=value", but for booleans
* either "name" or "noname".
*/
if (params[i].jp_flags &
(JP_BOOL | JP_NOBOOL)) {
if (*(int *)params[i].jp_value)
printf("%s", params[i].jp_name);
else {
nname = (params[i].jp_flags &
JP_NOBOOL) ?
nononame(params[i].jp_name)
: noname(params[i].jp_name);
printf("%s", nname);
free(nname);
}
continue;
}
printf("%s=", params[i].jp_name);
}
if (params[i].jp_valuelen == 0) {
if (pflags & PRINT_QUOTED)
printf("\"\"");
else if (!(pflags & PRINT_NAMEVAL))
putchar('-');
} else
quoted_print(param_values[i]);
}
putchar('\n');
for (i = 0; i < nparams; i++)
if (params[i].jp_flags & JP_USER)
free(param_values[i]);
}
return (jid);
}
static void
quoted_print(char *str)
{
int c, qc;
char *p = str;
/* An empty string needs quoting. */
if (!*p) {
fputs("\"\"", stdout);
return;
}
/*
* The value will be surrounded by quotes if it contains spaces
* or quotes.
*/
qc = strchr(p, '\'') ? '"'
: strchr(p, '"') ? '\''
: strchr(p, ' ') || strchr(p, '\t') ? '"'
: 0;
if (qc)
putchar(qc);
while ((c = *p++)) {
if (c == '\\' || c == qc)
putchar('\\');
putchar(c);
}
if (qc)
putchar(qc);
}
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