/
auditctl.c
1445 lines (1360 loc) · 34.3 KB
/
auditctl.c
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/* auditctl.c --
* Copyright 2004-2017 Red Hat Inc., Durham, North Carolina.
* All Rights Reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
* Authors:
* Steve Grubb <sgrubb@redhat.com>
* Rickard E. (Rik) Faith <faith@redhat.com>
* Richard Guy Briggs <rgb@redhat.com>
*/
#include "config.h"
#include <stdio.h>
#include <stdlib.h>
#include <stdbool.h>
#include <string.h> /* strdup needs xopen define */
#include <getopt.h>
#include <time.h>
#include <sys/stat.h>
#include <ctype.h>
#include <unistd.h>
#include <sys/utsname.h>
#include <sys/select.h>
#include <sys/time.h>
#include <fcntl.h>
#include <errno.h>
#include <libgen.h> /* For basename */
#include <limits.h> /* PATH_MAX */
#include "libaudit.h"
#include "auditctl-listing.h"
#include "private.h"
/* This define controls the size of the line that we will request when
* reading in rules from a file.
*/
#define LINE_SIZE 6144
/* Global functions */
static int handle_request(int status);
static void get_reply(void);
extern int delete_all_rules(int fd);
/* Global vars */
int list_requested = 0, interpret = 0;
char key[AUDIT_MAX_KEY_LEN+1];
const char key_sep[2] = { AUDIT_KEY_SEPARATOR, 0 };
static int keylen;
static int fd = -1;
static int add = AUDIT_FILTER_UNSET, del = AUDIT_FILTER_UNSET, action = -1;
static int ignore = 0, continue_error = 0;
static int exclude = 0;
static int multiple = 0;
static struct audit_rule_data *rule_new = NULL;
/*
* This function will reset everything used for each loop when loading
* a ruleset from a file.
*/
static int reset_vars(void)
{
list_requested = 0;
_audit_syscalladded = 0;
_audit_permadded = 0;
_audit_archadded = 0;
_audit_exeadded = 0;
_audit_filterfsadded = 0;
_audit_elf = 0;
add = AUDIT_FILTER_UNSET;
del = AUDIT_FILTER_UNSET;
action = -1;
exclude = 0;
multiple = 0;
free(rule_new);
rule_new = malloc(sizeof(struct audit_rule_data));
memset(rule_new, 0, sizeof(struct audit_rule_data));
if (fd < 0) {
if ((fd = audit_open()) < 0) {
audit_msg(LOG_ERR, "Cannot open netlink audit socket");
return 1;
}
}
return 0;
}
static void usage(void)
{
printf(
"usage: auditctl [options]\n"
" -a <l,a> Append rule to end of <l>ist with <a>ction\n"
" -A <l,a> Add rule at beginning of <l>ist with <a>ction\n"
" -b <backlog> Set max number of outstanding audit buffers\n"
" allowed Default=64\n"
" -c Continue through errors in rules\n"
" -C f=f Compare collected fields if available:\n"
" Field name, operator(=,!=), field name\n"
" -d <l,a> Delete rule from <l>ist with <a>ction\n"
" l=task,exit,user,exclude\n"
" a=never,always\n"
" -D Delete all rules and watches\n"
" -e [0..2] Set enabled flag\n"
" -f [0..2] Set failure flag\n"
" 0=silent 1=printk 2=panic\n"
" -F f=v Build rule: field name, operator(=,!=,<,>,<=,\n"
" >=,&,&=) value\n"
" -h Help\n"
" -i Ignore errors when reading rules from file\n"
" -k <key> Set filter key on audit rule\n"
" -l List rules\n"
" -m text Send a user-space message\n"
" -p [r|w|x|a] Set permissions filter on watch\n"
" r=read, w=write, x=execute, a=attribute\n"
" -q <mount,subtree> make subtree part of mount point's dir watches\n"
" -r <rate> Set limit in messages/sec (0=none)\n"
" -R <file> read rules from file\n"
" -s Report status\n"
" -S syscall Build rule: syscall name or number\n"
" -t Trim directory watches\n"
" -v Version\n"
" -w <path> Insert watch at <path>\n"
" -W <path> Remove watch at <path>\n"
#if defined(HAVE_DECL_AUDIT_FEATURE_VERSION) && \
defined(HAVE_STRUCT_AUDIT_STATUS_FEATURE_BITMAP)
" --loginuid-immutable Make loginuids unchangeable once set\n"
#endif
#if HAVE_DECL_AUDIT_VERSION_BACKLOG_WAIT_TIME == 1 || \
HAVE_DECL_AUDIT_STATUS_BACKLOG_WAIT_TIME == 1
" --backlog_wait_time Set the kernel backlog_wait_time\n"
#endif
#if defined(HAVE_STRUCT_AUDIT_STATUS_FEATURE_BITMAP)
" --reset-lost Reset the lost record counter\n"
#endif
);
}
static int lookup_filter(const char *str, int *filter)
{
if (strcmp(str, "task") == 0)
*filter = AUDIT_FILTER_TASK;
else if (strcmp(str, "exit") == 0)
*filter = AUDIT_FILTER_EXIT;
else if (strcmp(str, "user") == 0)
*filter = AUDIT_FILTER_USER;
else if (strcmp(str, "filesystem") == 0)
*filter = AUDIT_FILTER_FS;
else if (strcmp(str, "exclude") == 0) {
*filter = AUDIT_FILTER_EXCLUDE;
exclude = 1;
} else
return 2;
return 0;
}
static int lookup_action(const char *str, int *act)
{
if (strcmp(str, "never") == 0)
*act = AUDIT_NEVER;
else if (strcmp(str, "possible") == 0)
return 1;
else if (strcmp(str, "always") == 0)
*act = AUDIT_ALWAYS;
else
return 2;
return 0;
}
/*
* Returns 0 ok, 1 deprecated action, 2 rule error,
* 3 multiple rule insert/delete
*/
static int audit_rule_setup(char *opt, int *filter, int *act, int lineno)
{
int rc;
char *p;
if (++multiple != 1)
return 3;
p = strchr(opt, ',');
if (p == NULL || strchr(p+1, ','))
return 2;
*p = 0;
/* Try opt both ways */
if (lookup_filter(opt, filter) == 2) {
rc = lookup_action(opt, act);
if (rc != 0) {
*p = ',';
return rc;
}
}
/* Repair the string */
*p = ',';
opt = p+1;
/* If flags are empty, p+1 must be the filter */
if (*filter == AUDIT_FILTER_UNSET)
lookup_filter(opt, filter);
else {
rc = lookup_action(opt, act);
if (rc != 0)
return rc;
}
/* Make sure we set both */
if (*filter == AUDIT_FILTER_UNSET || *act == -1)
return 2;
return 0;
}
/*
* This function will check the path before accepting it. It returns
* 1 on error and 0 on success.
*/
static int check_path(const char *path)
{
char *ptr, *base;
size_t nlen;
size_t plen = strlen(path);
if (plen >= PATH_MAX) {
audit_msg(LOG_ERR, "The path passed for the watch is too big");
return 1;
}
if (path[0] != '/') {
audit_msg(LOG_ERR, "The path must start with '/'");
return 1;
}
ptr = strdup(path);
base = basename(ptr);
nlen = strlen(base);
free(ptr);
if (nlen > NAME_MAX) {
audit_msg(LOG_ERR, "The base name of the path is too big");
return 1;
}
/* These are warnings, not errors */
if (strstr(path, ".."))
audit_msg(LOG_WARNING,
"Warning - relative path notation is not supported");
if (strchr(path, '*') || strchr(path, '?'))
audit_msg(LOG_WARNING,
"Warning - wildcard notation is not supported");
return 0;
}
/*
* Setup a watch. The "name" of the watch in userspace will be the <path> to
* the watch. When this potential watch reaches the kernel, it will resolve
* down to <name> (of terminating file or directory).
* Returns a 1 on success & -1 on failure.
*/
static int audit_setup_watch_name(struct audit_rule_data **rulep, char *path)
{
int type = AUDIT_WATCH;
size_t len;
struct stat buf;
if (check_path(path))
return -1;
// Trim trailing '/' should they exist
len = strlen(path);
if (len > 2 && path[len-1] == '/') {
while (path[len-1] == '/' && len > 1) {
path[len-1] = 0;
len--;
}
}
if (stat(path, &buf) == 0) {
if (S_ISDIR(buf.st_mode))
type = AUDIT_DIR;
}
/* FIXME: might want to check to see that rule is empty */
if (audit_add_watch_dir(type, rulep, path))
return -1;
return 1;
}
/*
* Setup a watch permissions.
* Returns a 1 on success & -1 on failure.
*/
static int audit_setup_perms(struct audit_rule_data *rule, const char *opt)
{
unsigned int i, len, val = 0;
len = strlen(opt);
if (len > 4)
return -1;
for (i = 0; i < len; i++) {
switch (tolower(opt[i])) {
case 'r':
val |= AUDIT_PERM_READ;
break;
case 'w':
val |= AUDIT_PERM_WRITE;
break;
case 'x':
val |= AUDIT_PERM_EXEC;
break;
case 'a':
val |= AUDIT_PERM_ATTR;
break;
default:
audit_msg(LOG_ERR,
"Permission %c isn't supported",
opt[i]);
return -1;
}
}
if (audit_update_watch_perms(rule_new, val) == 0) {
_audit_permadded = 1;
return 1;
}
return -1;
}
static int equiv_parse(char *optarg, char **mp, char **sub)
{
char *ptr = strchr(optarg, ',');
if (ptr == NULL)
return -1; // no comma
*ptr = 0;
ptr++;
if (*ptr == 0)
return -1; // ends with comma
*mp = optarg;
*sub = ptr;
if (strchr(*sub, ','))
return -1; // too many commas
return 0;
}
int audit_request_rule_list(int fd)
{
if (audit_request_rules_list_data(fd) > 0) {
list_requested = 1;
get_reply();
return 1;
}
return 0;
}
void check_rule_mismatch(int lineno, const char *option)
{
struct audit_rule_data tmprule;
unsigned int old_audit_elf = _audit_elf;
int rc = 0;
switch (_audit_elf)
{
case AUDIT_ARCH_X86_64:
_audit_elf = AUDIT_ARCH_I386;
break;
case AUDIT_ARCH_PPC64:
_audit_elf = AUDIT_ARCH_PPC;
break;
case AUDIT_ARCH_S390X:
_audit_elf = AUDIT_ARCH_S390;
break;
}
memset(&tmprule, 0, sizeof(struct audit_rule_data));
audit_rule_syscallbyname_data(&tmprule, option);
if (memcmp(tmprule.mask, rule_new->mask, AUDIT_BITMASK_SIZE))
rc = 1;
_audit_elf = old_audit_elf;
if (rc) {
if (lineno)
audit_msg(LOG_WARNING, "WARNING - 32/64 bit syscall mismatch in line %d, you should specify an arch", lineno);
else
audit_msg(LOG_WARNING, "WARNING - 32/64 bit syscall mismatch, you should specify an arch");
}
}
int report_status(int fd)
{
int retval;
retval = audit_request_status(fd);
if (retval == -1) {
if (errno == ECONNREFUSED)
fprintf(stderr, "The audit system is disabled\n");
return -1;
}
get_reply();
retval = audit_request_features(fd);
if (retval == -1) {
// errno is EINVAL if the kernel does support features API
if (errno == EINVAL)
return -2;
return -1;
}
get_reply();
return -2;
}
int parse_syscall(struct audit_rule_data *rule_new, const char *optarg)
{
int retval = 0;
char *saved;
if (strchr(optarg, ',')) {
char *ptr, *tmp = strdup(optarg);
if (tmp == NULL)
return -1;
ptr = strtok_r(tmp, ",", &saved);
while (ptr) {
retval = audit_rule_syscallbyname_data(rule_new, ptr);
if (retval != 0) {
if (retval == -1) {
audit_msg(LOG_ERR,
"Syscall name unknown: %s",
ptr);
retval = -3; // error reported
}
break;
}
ptr = strtok_r(NULL, ",", &saved);
}
free(tmp);
return retval;
}
return audit_rule_syscallbyname_data(rule_new, optarg);
}
struct option long_opts[] =
{
#if defined(HAVE_DECL_AUDIT_FEATURE_VERSION) && \
defined(HAVE_STRUCT_AUDIT_STATUS_FEATURE_BITMAP)
{"loginuid-immutable", 0, NULL, 1},
#endif
#if HAVE_DECL_AUDIT_VERSION_BACKLOG_WAIT_TIME == 1 || \
HAVE_DECL_AUDIT_STATUS_BACKLOG_WAIT_TIME == 1
{"backlog_wait_time", 1, NULL, 2},
#endif
#if defined(HAVE_STRUCT_AUDIT_STATUS_FEATURE_BITMAP)
{"reset-lost", 0, NULL, 3},
#endif
{NULL, 0, NULL, 0}
};
// FIXME: Change these to enums
/*
* returns: -3 deprecated, -2 success - no reply, -1 error - noreply,
* 0 success - reply, > 0 success - rule
*/
static int setopt(int count, int lineno, char *vars[])
{
int c, lidx = 0;
int retval = 0, rc;
optind = 0;
opterr = 0;
key[0] = 0;
keylen = AUDIT_MAX_KEY_LEN;
while ((retval >= 0) && (c = getopt_long(count, vars,
"hicslDvtC:e:f:r:b:a:A:d:S:F:m:R:w:W:k:p:q:",
long_opts, &lidx)) != EOF) {
int flags = AUDIT_FILTER_UNSET;
rc = 10; // Init to something impossible to see if unused.
switch (c) {
case 'h':
usage();
retval = -1;
break;
case 'i':
ignore = 1;
retval = -2;
break;
case 'c':
ignore = 1;
continue_error = 1;
retval = -2;
break;
case 's':
if (count > 3) {
audit_msg(LOG_ERR,
"Too many options for status command");
retval = -1;
break;
} else if (optind == 2 && count == 3) {
if (strcmp(vars[optind], "-i") == 0) {
interpret = 1;
count -= 1;
} else {
audit_msg(LOG_ERR,
"Only -i option is allowed");
retval = -1;
break;
}
}
retval = report_status(fd);
break;
case 'e':
if (optarg && ((strcmp(optarg, "0") == 0) ||
(strcmp(optarg, "1") == 0) ||
(strcmp(optarg, "2") == 0))) {
if (audit_set_enabled(fd, strtoul(optarg,NULL,0)) > 0)
audit_request_status(fd);
else
retval = -1;
} else {
audit_msg(LOG_ERR, "Enable must be 0, 1, or 2 was %s",
optarg);
retval = -1;
}
break;
case 'f':
if (optarg && ((strcmp(optarg, "0") == 0) ||
(strcmp(optarg, "1") == 0) ||
(strcmp(optarg, "2") == 0))) {
if (audit_set_failure(fd, strtoul(optarg,NULL,0)) > 0)
audit_request_status(fd);
else
return -1;
} else {
audit_msg(LOG_ERR, "Failure must be 0, 1, or 2 was %s",
optarg);
retval = -1;
}
break;
case 'r':
if (optarg && isdigit(optarg[0])) {
uint32_t rate;
errno = 0;
rate = strtoul(optarg,NULL,0);
if (errno) {
audit_msg(LOG_ERR, "Error converting rate");
return -1;
}
if (audit_set_rate_limit(fd, rate) > 0)
audit_request_status(fd);
else
return -1;
} else {
audit_msg(LOG_ERR,"Rate must be a numeric value was %s",
optarg);
retval = -1;
}
break;
case 'b':
if (optarg && isdigit(optarg[0])) {
uint32_t limit;
errno = 0;
limit = strtoul(optarg,NULL,0);
if (errno) {
audit_msg(LOG_ERR, "Error converting backlog");
return -1;
}
if (audit_set_backlog_limit(fd, limit) > 0)
audit_request_status(fd);
else
return -1;
} else {
audit_msg(LOG_ERR,
"Backlog must be a numeric value was %s",
optarg);
retval = -1;
}
break;
case 'l':
if (count > 4) {
audit_msg(LOG_ERR,
"Wrong number of options for list request");
retval = -1;
break;
}
if (count == 3) {
if (strcmp(vars[optind], "-i") == 0) {
interpret = 1;
count -= 1;
} else {
audit_msg(LOG_ERR,
"Only -k or -i options are allowed");
retval = -1;
}
} else if (count == 4) {
if (vars[optind] && strcmp(vars[optind], "-k") == 0) {
strncat(key, vars[3], keylen);
count -= 2;
} else {
audit_msg(LOG_ERR,
"Only -k or -i options are allowed");
retval = -1;
break;
}
}
if (audit_request_rule_list(fd)) {
list_requested = 1;
retval = -2;
} else
retval = -1;
break;
case 'a':
if (strstr(optarg, "task") && _audit_syscalladded) {
audit_msg(LOG_ERR,
"Syscall auditing requested for task list");
retval = -1;
} else {
rc = audit_rule_setup(optarg, &add, &action, lineno);
if (rc == 3) {
audit_msg(LOG_ERR,
"Multiple rule insert/delete operations are not allowed\n");
retval = -1;
} else if (rc == 2) {
audit_msg(LOG_ERR,
"Append rule - bad keyword %s",
optarg);
retval = -1;
} else if (rc == 1) {
audit_msg(LOG_ERR,
"Append rule - possible is deprecated");
return -3; /* deprecated - eat it */
} else
retval = 1; /* success - please send */
}
break;
case 'A':
if (strstr(optarg, "task") && _audit_syscalladded) {
audit_msg(LOG_ERR,
"Error: syscall auditing requested for task list");
retval = -1;
} else {
rc = audit_rule_setup(optarg, &add, &action, lineno);
if (rc == 3) {
audit_msg(LOG_ERR,
"Multiple rule insert/delete operations are not allowed");
retval = -1;
} else if (rc == 2) {
audit_msg(LOG_ERR,
"Add rule - bad keyword %s", optarg);
retval = -1;
} else if (rc == 1) {
audit_msg(LOG_WARNING,
"Append rule - possible is deprecated");
return -3; /* deprecated - eat it */
} else {
add |= AUDIT_FILTER_PREPEND;
retval = 1; /* success - please send */
}
}
break;
case 'd':
rc = audit_rule_setup(optarg, &del, &action, lineno);
if (rc == 3) {
audit_msg(LOG_ERR,
"Multiple rule insert/delete operations are not allowed");
retval = -1;
} else if (rc == 2) {
audit_msg(LOG_ERR, "Delete rule - bad keyword %s",
optarg);
retval = -1;
} else if (rc == 1) {
audit_msg(LOG_INFO,
"Delete rule - possible is deprecated");
return -3; /* deprecated - eat it */
} else
retval = 1; /* success - please send */
break;
case 'S': {
int unknown_arch = !_audit_elf;
/* Do some checking to make sure that we are not adding a
* syscall rule to a list that does not make sense. */
if (((add & (AUDIT_FILTER_MASK|AUDIT_FILTER_UNSET)) ==
AUDIT_FILTER_TASK || (del &
(AUDIT_FILTER_MASK|AUDIT_FILTER_UNSET)) ==
AUDIT_FILTER_TASK)) {
audit_msg(LOG_ERR,
"Error: syscall auditing being added to task list");
return -1;
} else if (((add & (AUDIT_FILTER_MASK|AUDIT_FILTER_UNSET)) ==
AUDIT_FILTER_USER || (del &
(AUDIT_FILTER_MASK|AUDIT_FILTER_UNSET)) ==
AUDIT_FILTER_USER)) {
audit_msg(LOG_ERR,
"Error: syscall auditing being added to user list");
return -1;
} else if (((add & (AUDIT_FILTER_MASK|AUDIT_FILTER_UNSET)) ==
AUDIT_FILTER_FS || (del &
(AUDIT_FILTER_MASK|AUDIT_FILTER_UNSET)) ==
AUDIT_FILTER_FS)) {
audit_msg(LOG_ERR,
"Error: syscall auditing being added to filesystem list");
return -1;
} else if (exclude) {
audit_msg(LOG_ERR,
"Error: syscall auditing cannot be put on exclude list");
return -1;
} else {
if (unknown_arch) {
int machine;
unsigned int elf;
machine = audit_detect_machine();
if (machine < 0) {
audit_msg(LOG_ERR,
"Error detecting machine type");
return -1;
}
elf = audit_machine_to_elf(machine);
if (elf == 0) {
audit_msg(LOG_ERR,
"Error looking up elf type %d",
machine);
return -1;
}
_audit_elf = elf;
}
}
rc = parse_syscall(rule_new, optarg);
switch (rc)
{
case 0:
_audit_syscalladded = 1;
if (unknown_arch && add != AUDIT_FILTER_UNSET)
check_rule_mismatch(lineno, optarg);
break;
case -1:
audit_msg(LOG_ERR, "Syscall name unknown: %s",
optarg);
retval = -1;
break;
case -2:
audit_msg(LOG_ERR, "Elf type unknown: 0x%x",
_audit_elf);
retval = -1;
break;
case -3: // Error reported - do nothing here
retval = -1;
break;
}}
break;
case 'F':
if (add != AUDIT_FILTER_UNSET)
flags = add & AUDIT_FILTER_MASK;
else if (del != AUDIT_FILTER_UNSET)
flags = del & AUDIT_FILTER_MASK;
// if the field is arch & there is a -t option...we
// can allow it
else if ((optind >= count) || (strstr(optarg, "arch=") == NULL)
|| (strcmp(vars[optind], "-t") != 0)) {
audit_msg(LOG_ERR, "List must be given before field");
retval = -1;
break;
}
// Keys need to get handled differently
if (strncmp(optarg, "key=", 4) == 0) {
optarg += 4;
goto process_keys;
}
rc = audit_rule_fieldpair_data(&rule_new,optarg,flags);
if (rc != 0) {
audit_number_to_errmsg(rc, optarg);
retval = -1;
} else {
if (rule_new->fields[rule_new->field_count-1] ==
AUDIT_PERM)
_audit_permadded = 1;
if (rule_new->fields[rule_new->field_count-1] ==
AUDIT_EXE)
_audit_exeadded = 1;
}
break;
case 'C':
if (add != AUDIT_FILTER_UNSET)
flags = add & AUDIT_FILTER_MASK;
else if (del != AUDIT_FILTER_UNSET)
flags = del & AUDIT_FILTER_MASK;
rc = audit_rule_interfield_comp_data(&rule_new, optarg, flags);
if (rc != 0) {
audit_number_to_errmsg(rc, optarg);
retval = -1;
} else {
if (rule_new->fields[rule_new->field_count - 1] ==
AUDIT_PERM)
_audit_permadded = 1;
}
break;
case 'm':
if (count > 3) {
audit_msg(LOG_ERR,
"The -m option must be only the only option and takes 1 parameter");
retval = -1;
} else {
const char*s = optarg;
while (*s) {
if (*s < 32) {
audit_msg(LOG_ERR,
"Illegal character in audit event");
return -1;
}
s++;
}
if (audit_log_user_message( fd, AUDIT_USER,
optarg, NULL, NULL, NULL, 1) <= 0)
retval = -1;
else
return -2; // success - no reply for this
}
break;
case 'R':
audit_msg(LOG_ERR, "Error - nested rule files not supported");
retval = -1;
break;
case 'D':
if (count > 4 || count == 3) {
audit_msg(LOG_ERR,
"Wrong number of options for Delete all request");
retval = -1;
break;
}
if (count == 4) {
if (strcmp(vars[optind], "-k") == 0) {
strncat(key, vars[3], keylen);
count -= 2;
} else {
audit_msg(LOG_ERR,
"Only the -k option is allowed");
retval = -1;
break;
}
}
retval = delete_all_rules(fd);
if (retval == 0) {
(void)audit_request_rule_list(fd);
key[0] = 0;
retval = -2;
}
break;
case 'w':
if (add != AUDIT_FILTER_UNSET ||
del != AUDIT_FILTER_UNSET) {
audit_msg(LOG_ERR,
"watch option can't be given with a syscall");
retval = -1;
} else if (optarg) {
add = AUDIT_FILTER_EXIT;
action = AUDIT_ALWAYS;
_audit_syscalladded = 1;
retval = audit_setup_watch_name(&rule_new, optarg);
} else {
audit_msg(LOG_ERR, "watch option needs a path");
retval = -1;
}
break;
case 'W':
if (optarg) {
del = AUDIT_FILTER_EXIT;
action = AUDIT_ALWAYS;
_audit_syscalladded = 1;
retval = audit_setup_watch_name(&rule_new, optarg);
} else {
audit_msg(LOG_ERR, "watch option needs a path");
retval = -1;
}
break;
case 'k':
if (!(_audit_syscalladded || _audit_permadded ||
_audit_exeadded ||
_audit_filterfsadded) ||
(add==AUDIT_FILTER_UNSET && del==AUDIT_FILTER_UNSET)) {
audit_msg(LOG_ERR,
"key option needs a watch or syscall given prior to it");
retval = -1;
break;
} else if (!optarg) {
audit_msg(LOG_ERR, "key option needs a value");
retval = -1;
break;
}
process_keys:
if ((strlen(optarg)+strlen(key)+(!!key[0])) >
AUDIT_MAX_KEY_LEN) {
audit_msg(LOG_ERR, "key option exceeds size limit");
retval = -1;
} else {
if (strchr(optarg, AUDIT_KEY_SEPARATOR))
audit_msg(LOG_ERR,
"key %s has illegal character", optarg);
if (key[0]) { // Add the separator if we need to
strcat(key, key_sep);
keylen--;
}
strncat(key, optarg, keylen);
keylen = AUDIT_MAX_KEY_LEN - strlen(key);
}
break;
case 'p':
if (!add && !del) {
audit_msg(LOG_ERR,
"permission option needs a watch given prior to it");
retval = -1;
} else if (!optarg) {
audit_msg(LOG_ERR, "permission option needs a filter");
retval = -1;
} else
retval = audit_setup_perms(rule_new, optarg);
break;
case 'q':
if (_audit_syscalladded) {
audit_msg(LOG_ERR,
"Syscall auditing requested for make equivalent");
retval = -1;
} else {
char *mp, *sub;
retval = equiv_parse(optarg, &mp, &sub);
if (retval < 0) {
audit_msg(LOG_ERR,
"Error parsing equivalent parts");
retval = -1;
} else {
retval = audit_make_equivalent(fd, mp, sub);
if (retval <= 0) {
retval = -1;
} else
return -2; // success - no reply needed
}
}
break;
case 't':
retval = audit_trim_subtrees(fd);
if (retval <= 0)
retval = -1;
else
return -2; // success - no reply for this
break;
case 'v':
printf("auditctl version %s\n", VERSION);
retval = -2;
break;
// Now the long options
case 1:
retval = audit_set_loginuid_immutable(fd);
if (retval <= 0)
retval = -1;
else
return -2; // success - no reply for this
break;
case 2:
#if HAVE_DECL_AUDIT_VERSION_BACKLOG_WAIT_TIME == 1 || \
HAVE_DECL_AUDIT_STATUS_BACKLOG_WAIT_TIME == 1
if (optarg && isdigit(optarg[0])) {
uint32_t bwt;
errno = 0;
bwt = strtoul(optarg,NULL,0);
if (errno) {
audit_msg(LOG_ERR,
"Error converting backlog_wait_time");
return -1;
}
if (audit_set_backlog_wait_time(fd, bwt) > 0)
audit_request_status(fd);
else
return -1;
} else {
audit_msg(LOG_ERR,
"Backlog_wait_time must be a numeric value was %s",
optarg);
retval = -1;
}
#else
audit_msg(LOG_ERR,
"backlog_wait_time is not supported on your kernel");
retval = -1;
#endif
break;
case 3:
if ((rc = audit_reset_lost(fd)) >= 0) {
audit_msg(LOG_INFO, "lost: %u", rc);
return -2;
} else {
audit_number_to_errmsg(rc, long_opts[lidx].name);
retval = -1;
}
break;