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3423d0af7ca1e8cfd8ccc57c2a0cea333dc45192
sudo/plugins/sudoers/defaults.c

985 lines
24 KiB
C
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/*
* Copyright (c) 1999-2005, 2007-2016
* Todd C. Miller <Todd.Miller@courtesan.com>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*
* Sponsored in part by the Defense Advanced Research Projects
* Agency (DARPA) and Air Force Research Laboratory, Air Force
* Materiel Command, USAF, under agreement number F39502-99-1-0512.
*/
#include <config.h>
#include <sys/types.h>
#include <stdio.h>
#include <stdlib.h>
#ifdef HAVE_STRING_H
# include <string.h>
#endif /* HAVE_STRING_H */
#ifdef HAVE_STRINGS_H
# include <strings.h>
#endif /* HAVE_STRINGS_H */
#include <unistd.h>
#include <pwd.h>
#include <ctype.h>
#include "sudoers.h"
#include "parse.h"
#include <gram.h>
/*
* For converting between syslog numbers and strings.
*/
struct strmap {
char *name;
int num;
};
static struct strmap facilities[] = {
#ifdef LOG_AUTHPRIV
{ "authpriv", LOG_AUTHPRIV },
#endif
{ "auth", LOG_AUTH },
{ "daemon", LOG_DAEMON },
{ "user", LOG_USER },
{ "local0", LOG_LOCAL0 },
{ "local1", LOG_LOCAL1 },
{ "local2", LOG_LOCAL2 },
{ "local3", LOG_LOCAL3 },
{ "local4", LOG_LOCAL4 },
{ "local5", LOG_LOCAL5 },
{ "local6", LOG_LOCAL6 },
{ "local7", LOG_LOCAL7 },
{ NULL, -1 }
};
static struct strmap priorities[] = {
{ "alert", LOG_ALERT },
{ "crit", LOG_CRIT },
{ "debug", LOG_DEBUG },
{ "emerg", LOG_EMERG },
{ "err", LOG_ERR },
{ "info", LOG_INFO },
{ "notice", LOG_NOTICE },
{ "warning", LOG_WARNING },
{ NULL, -1 }
};
static struct early_default early_defaults[] = {
#ifdef FQDN
{ "fqdn", &sudo_defs_table[I_FQDN] },
#else
{ "fqdn" },
#endif
{ "match_group_by_gid" },
{ "group_plugin" },
{ "runas_default" },
{ "sudoers_locale" },
{ NULL }
};
/*
* Local prototypes.
*/
static bool store_int(const char *, struct sudo_defs_types *);
static bool store_list(const char *, struct sudo_defs_types *, int op);
static bool store_mode(const char *, struct sudo_defs_types *);
static int store_str(const char *, struct sudo_defs_types *);
static bool store_syslogfac(const char *, struct sudo_defs_types *);
static bool store_syslogpri(const char *, struct sudo_defs_types *);
static bool store_tuple(const char *, struct sudo_defs_types *);
static bool store_uint(const char *, struct sudo_defs_types *);
static bool store_float(const char *, struct sudo_defs_types *);
static bool list_op(const char *, size_t, struct sudo_defs_types *, enum list_ops);
static const char *logfac2str(int);
static const char *logpri2str(int);
/*
* Table describing compile-time and run-time options.
*/
#include <def_data.c>
/*
* Print version and configure info.
*/
void
dump_defaults(void)
{
struct sudo_defs_types *cur;
struct list_member *item;
struct def_values *def;
char *desc;
debug_decl(dump_defaults, SUDOERS_DEBUG_DEFAULTS)
for (cur = sudo_defs_table; cur->name; cur++) {
if (cur->desc) {
desc = _(cur->desc);
switch (cur->type & T_MASK) {
case T_FLAG:
if (cur->sd_un.flag)
sudo_printf(SUDO_CONV_INFO_MSG, "%s\n", desc);
break;
case T_STR:
if (cur->sd_un.str) {
sudo_printf(SUDO_CONV_INFO_MSG, desc, cur->sd_un.str);
sudo_printf(SUDO_CONV_INFO_MSG, "\n");
}
break;
case T_LOGFAC:
if (cur->sd_un.ival) {
sudo_printf(SUDO_CONV_INFO_MSG, desc,
logfac2str(cur->sd_un.ival));
sudo_printf(SUDO_CONV_INFO_MSG, "\n");
}
break;
case T_LOGPRI:
if (cur->sd_un.ival) {
sudo_printf(SUDO_CONV_INFO_MSG, desc,
logpri2str(cur->sd_un.ival));
sudo_printf(SUDO_CONV_INFO_MSG, "\n");
}
break;
case T_INT:
sudo_printf(SUDO_CONV_INFO_MSG, desc, cur->sd_un.ival);
sudo_printf(SUDO_CONV_INFO_MSG, "\n");
break;
case T_UINT:
sudo_printf(SUDO_CONV_INFO_MSG, desc, cur->sd_un.uival);
sudo_printf(SUDO_CONV_INFO_MSG, "\n");
break;
case T_FLOAT:
sudo_printf(SUDO_CONV_INFO_MSG, desc, cur->sd_un.fval);
sudo_printf(SUDO_CONV_INFO_MSG, "\n");
break;
case T_MODE:
sudo_printf(SUDO_CONV_INFO_MSG, desc, cur->sd_un.mode);
sudo_printf(SUDO_CONV_INFO_MSG, "\n");
break;
case T_LIST:
if (!SLIST_EMPTY(&cur->sd_un.list)) {
sudo_printf(SUDO_CONV_INFO_MSG, "%s\n", desc);
SLIST_FOREACH(item, &cur->sd_un.list, entries) {
sudo_printf(SUDO_CONV_INFO_MSG,
"\t%s\n", item->value);
}
}
break;
case T_TUPLE:
for (def = cur->values; def->sval; def++) {
if (cur->sd_un.tuple == def->nval) {
sudo_printf(SUDO_CONV_INFO_MSG, desc, def->sval);
break;
}
}
sudo_printf(SUDO_CONV_INFO_MSG, "\n");
break;
}
}
}
debug_return;
}
static bool
set_default_entry(struct sudo_defs_types *def, const char *val, int op,
bool quiet, bool do_callback)
{
int rc;
debug_decl(set_default_entry, SUDOERS_DEBUG_DEFAULTS)
if (val == NULL && !ISSET(def->type, T_FLAG)) {
/* Check for bogus boolean usage or missing value if non-boolean. */
if (!ISSET(def->type, T_BOOL) || op != false) {
if (!quiet)
sudo_warnx(U_("no value specified for `%s'"), def->name);
debug_return_bool(false);
}
}
switch (def->type & T_MASK) {
case T_LOGFAC:
rc = store_syslogfac(val, def);
break;
case T_LOGPRI:
rc = store_syslogpri(val, def);
break;
case T_STR:
if (ISSET(def->type, T_PATH) && val != NULL && *val != '/') {
if (!quiet) {
sudo_warnx(U_("values for `%s' must start with a '/'"),
def->name);
}
rc = -1;
break;
}
rc = store_str(val, def);
break;
case T_INT:
rc = store_int(val, def);
break;
case T_UINT:
rc = store_uint(val, def);
break;
case T_FLOAT:
rc = store_float(val, def);
break;
case T_MODE:
rc = store_mode(val, def);
break;
case T_FLAG:
if (val != NULL) {
if (!quiet) {
sudo_warnx(U_("option `%s' does not take a value"),
def->name);
}
rc = -1;
break;
}
def->sd_un.flag = op;
rc = true;
break;
case T_LIST:
rc = store_list(val, def, op);
break;
case T_TUPLE:
rc = store_tuple(val, def);
break;
default:
if (!quiet) {
sudo_warnx(U_("invalid Defaults type 0x%x for option `%s'"),
def->type, def->name);
}
rc = -1;
break;
}
switch (rc) {
case -1:
/* Error message already displayed. */
rc = false;
break;
case false:
if (!quiet) {
sudo_warnx(U_("value `%s' is invalid for option `%s'"),
val, def->name);
}
break;
case true:
if (do_callback && def->callback)
rc = def->callback(&def->sd_un);
break;
}
debug_return_bool(rc);
}
struct early_default *
is_early_default(const char *var)
{
struct early_default *early;
debug_decl(is_early_default, SUDOERS_DEBUG_DEFAULTS)
for (early = early_defaults; early->var != NULL; early++) {
if (strcmp(var, early->var) == 0)
debug_return_ptr(early);
}
debug_return_ptr(NULL);
}
/*
* Sets/clears an entry in the defaults structure.
* If a variable that takes a value is used in a boolean
* context with op == 0, disable that variable.
* Eg. you may want to turn off logging to a file for some hosts.
* This is only meaningful for variables that are *optional*.
*/
static struct sudo_defs_types *
set_default_int(const char *var, const char *val, int op, bool quiet,
bool do_callback)
{
struct sudo_defs_types *cur;
int num;
debug_decl(set_default_int, SUDOERS_DEBUG_DEFAULTS)
for (cur = sudo_defs_table, num = 0; cur->name; cur++, num++) {
if (strcmp(var, cur->name) == 0)
break;
}
if (!cur->name) {
if (!quiet)
sudo_warnx(U_("unknown defaults entry `%s'"), var);
debug_return_ptr(NULL);
}
if (!set_default_entry(cur, val, op, quiet, do_callback))
debug_return_ptr(NULL);
debug_return_ptr(cur);
}
/*
* Sets/clears an entry in the defaults structure.
* Runs the callback if present on success.
*/
bool
set_default(const char *var, const char *val, int op, bool quiet)
{
const struct sudo_defs_types *def;
debug_decl(set_default, SUDOERS_DEBUG_DEFAULTS)
def = set_default_int(var, val, op, quiet, true);
debug_return_bool(def != NULL);
}
/*
* Like set_default() but stores the matching default value
* and does not run callbacks.
*/
bool
set_early_default(const char *var, const char *val, int op, bool quiet,
struct early_default *early)
{
const struct sudo_defs_types *def;
debug_decl(set_early_default, SUDOERS_DEBUG_DEFAULTS)
def = set_default_int(var, val, op, quiet, false);
if (def == NULL)
debug_return_bool(false);
early->def = def;
debug_return_bool(true);
}
/*
* Run callbacks for early defaults.
*/
bool
run_early_defaults(void)
{
struct early_default *early;
bool rc = true;
debug_decl(run_early_defaults, SUDOERS_DEBUG_DEFAULTS)
for (early = early_defaults; early->var != NULL; early++) {
if (early->def == NULL)
continue;
if (early->def->callback != NULL) {
if (!early->def->callback(&early->def->sd_un))
rc = false;
}
early->def = NULL;
}
debug_return_bool(rc);
}
static void
free_default(struct sudo_defs_types *def)
{
switch (def->type & T_MASK) {
case T_STR:
free(def->sd_un.str);
break;
case T_LIST:
(void)list_op(NULL, 0, def, freeall);
break;
}
memset(&def->sd_un, 0, sizeof(def->sd_un));
}
/*
* Set default options to compiled-in values.
* Any of these may be overridden at runtime by a "Defaults" file.
*/
bool
init_defaults(void)
{
static int firsttime = 1;
struct sudo_defs_types *def;
debug_decl(init_defaults, SUDOERS_DEBUG_DEFAULTS)
/* Clear any old settings. */
if (!firsttime) {
for (def = sudo_defs_table; def->name != NULL; def++)
free_default(def);
}
/* First initialize the flags. */
#ifdef LONG_OTP_PROMPT
def_long_otp_prompt = true;
#endif
#ifdef IGNORE_DOT_PATH
def_ignore_dot = true;
#endif
#ifdef ALWAYS_SEND_MAIL
def_mail_always = true;
#endif
#ifdef SEND_MAIL_WHEN_NO_USER
def_mail_no_user = true;
#endif
#ifdef SEND_MAIL_WHEN_NO_HOST
def_mail_no_host = true;
#endif
#ifdef SEND_MAIL_WHEN_NOT_OK
def_mail_no_perms = true;
#endif
#ifndef NO_TTY_TICKETS
def_tty_tickets = true;
#endif
#ifndef NO_LECTURE
def_lecture = once;
#endif
#ifndef NO_AUTHENTICATION
def_authenticate = true;
#endif
#ifndef NO_ROOT_SUDO
def_root_sudo = true;
#endif
#ifdef HOST_IN_LOG
def_log_host = true;
#endif
#ifdef SHELL_IF_NO_ARGS
def_shell_noargs = true;
#endif
#ifdef SHELL_SETS_HOME
def_set_home = true;
#endif
#ifndef DONT_LEAK_PATH_INFO
def_path_info = true;
#endif
#ifdef USE_INSULTS
def_insults = true;
#endif
#ifdef FQDN
def_fqdn = true;
#endif
#ifdef ENV_EDITOR
def_env_editor = true;
#endif
#ifdef UMASK_OVERRIDE
def_umask_override = true;
#endif
if ((def_iolog_file = strdup("%{seq}")) == NULL)
goto oom;
if ((def_iolog_dir = strdup(_PATH_SUDO_IO_LOGDIR)) == NULL)
goto oom;
if ((def_sudoers_locale = strdup("C")) == NULL)
goto oom;
def_env_reset = ENV_RESET;
def_set_logname = true;
def_closefrom = STDERR_FILENO + 1;
if ((def_pam_service = strdup("sudo")) == NULL)
goto oom;
#ifdef HAVE_PAM_LOGIN
if ((def_pam_login_service = strdup("sudo-i")) == NULL)
goto oom;
#else
if ((def_pam_login_service = strdup("sudo")) == NULL)
goto oom;
#endif
#ifdef NO_PAM_SESSION
def_pam_session = false;
#else
def_pam_session = true;
#endif
#ifdef HAVE_INNETGR
def_use_netgroups = true;
#endif
def_netgroup_tuple = false;
def_sudoedit_checkdir = true;
/* Syslog options need special care since they both strings and ints */
#if (LOGGING & SLOG_SYSLOG)
(void) store_syslogfac(LOGFAC, &sudo_defs_table[I_SYSLOG]);
(void) store_syslogpri(PRI_SUCCESS, &sudo_defs_table[I_SYSLOG_GOODPRI]);
(void) store_syslogpri(PRI_FAILURE, &sudo_defs_table[I_SYSLOG_BADPRI]);
#endif
/* Password flags also have a string and integer component. */
(void) store_tuple("any", &sudo_defs_table[I_LISTPW]);
(void) store_tuple("all", &sudo_defs_table[I_VERIFYPW]);
/* Then initialize the int-like things. */
#ifdef SUDO_UMASK
def_umask = SUDO_UMASK;
#else
def_umask = 0777;
#endif
def_loglinelen = MAXLOGFILELEN;
def_timestamp_timeout = TIMEOUT;
def_passwd_timeout = PASSWORD_TIMEOUT;
def_passwd_tries = TRIES_FOR_PASSWORD;
#ifdef HAVE_ZLIB_H
def_compress_io = true;
#endif
def_ignore_audit_errors = true;
def_ignore_iolog_errors = false;
def_ignore_logfile_errors = true;
/* Now do the strings */
if ((def_mailto = strdup(MAILTO)) == NULL)
goto oom;
if ((def_mailsub = strdup(N_(MAILSUBJECT))) == NULL)
goto oom;
if ((def_badpass_message = strdup(_(INCORRECT_PASSWORD))) == NULL)
goto oom;
if ((def_lecture_status_dir = strdup(_PATH_SUDO_LECTURE_DIR)) == NULL)
goto oom;
if ((def_timestampdir = strdup(_PATH_SUDO_TIMEDIR)) == NULL)
goto oom;
if ((def_passprompt = strdup(_(PASSPROMPT))) == NULL)
goto oom;
if ((def_runas_default = strdup(RUNAS_DEFAULT)) == NULL)
goto oom;
#ifdef _PATH_SUDO_SENDMAIL
if ((def_mailerpath = strdup(_PATH_SUDO_SENDMAIL)) == NULL)
goto oom;
if ((def_mailerflags = strdup("-t")) == NULL)
goto oom;
#endif
#if (LOGGING & SLOG_FILE)
if ((def_logfile = strdup(_PATH_SUDO_LOGFILE)) == NULL)
goto oom;
#endif
#ifdef EXEMPTGROUP
if ((def_exempt_group = strdup(EXEMPTGROUP)) == NULL)
goto oom;
#endif
#ifdef SECURE_PATH
if ((def_secure_path = strdup(SECURE_PATH)) == NULL)
goto oom;
#endif
if ((def_editor = strdup(EDITOR)) == NULL)
goto oom;
def_set_utmp = true;
def_pam_setcred = true;
def_syslog_maxlen = MAXSYSLOGLEN;
/* Reset the locale. */
if (!firsttime) {
if (!sudoers_initlocale(NULL, def_sudoers_locale))
goto oom;
}
/* Finally do the lists (currently just environment tables). */
if (!init_envtables())
goto oom;
firsttime = 0;
debug_return_bool(true);
oom:
sudo_warnx(U_("%s: %s"), __func__, U_("unable to allocate memory"));
debug_return_bool(false);
}
/*
* Check whether a defaults entry matches the specified type.
* Returns true if it matches, else false.
*/
static bool
default_type_matches(struct defaults *def, int what)
{
debug_decl(default_type_matches, SUDOERS_DEBUG_DEFAULTS)
switch (def->type) {
case DEFAULTS:
if (ISSET(what, SETDEF_GENERIC))
debug_return_bool(true);
break;
case DEFAULTS_USER:
if (ISSET(what, SETDEF_USER))
debug_return_bool(true);
break;
case DEFAULTS_RUNAS:
if (ISSET(what, SETDEF_RUNAS))
debug_return_bool(true);
break;
case DEFAULTS_HOST:
if (ISSET(what, SETDEF_HOST))
debug_return_bool(true);
break;
case DEFAULTS_CMND:
if (ISSET(what, SETDEF_CMND))
debug_return_bool(true);
break;
}
debug_return_bool(false);
}
/*
* Check whether a defaults entry's binding matches.
* Returns true if it matches, else false.
*/
static bool
default_binding_matches(struct defaults *def, int what)
{
debug_decl(default_binding_matches, SUDOERS_DEBUG_DEFAULTS)
switch (def->type) {
case DEFAULTS:
debug_return_bool(true);
break;
case DEFAULTS_USER:
if (userlist_matches(sudo_user.pw, def->binding) == ALLOW)
debug_return_bool(true);
break;
case DEFAULTS_RUNAS:
if (runaslist_matches(def->binding, NULL, NULL, NULL) == ALLOW)
debug_return_bool(true);
break;
case DEFAULTS_HOST:
if (hostlist_matches(sudo_user.pw, def->binding) == ALLOW)
debug_return_bool(true);
break;
case DEFAULTS_CMND:
if (cmndlist_matches(def->binding) == ALLOW)
debug_return_bool(true);
break;
}
debug_return_bool(false);
}
/*
* Update the defaults based on what was set by sudoers.
* Pass in an OR'd list of which default types to update.
*/
bool
update_defaults(int what, bool quiet)
{
struct defaults *def;
bool rc = true;
debug_decl(update_defaults, SUDOERS_DEBUG_DEFAULTS)
sudo_debug_printf(SUDO_DEBUG_INFO|SUDO_DEBUG_LINENO,
"what: 0x%02x", what);
/*
* First apply Defaults values marked as early.
*/
TAILQ_FOREACH(def, &defaults, entries) {
struct early_default *early = is_early_default(def->var);
if (early == NULL)
continue;
if (!default_type_matches(def, what) ||
!default_binding_matches(def, what))
continue;
if (!set_early_default(def->var, def->val, def->op, quiet, early))
rc = false;
}
if (!run_early_defaults())
rc = false;
/*
* Then set the rest of the defaults.
*/
TAILQ_FOREACH(def, &defaults, entries) {
/* Skip Defaults marked as early, we already did them. */
if (is_early_default(def->var))
continue;
if (!default_type_matches(def, what) ||
!default_binding_matches(def, what))
continue;
if (!set_default(def->var, def->val, def->op, quiet))
rc = false;
}
debug_return_bool(rc);
}
/*
* Check the defaults entries without actually setting them.
* Pass in an OR'd list of which default types to check.
*/
bool
check_defaults(int what, bool quiet)
{
struct sudo_defs_types *cur, tmp;
struct defaults *def;
bool rc = true;
debug_decl(check_defaults, SUDOERS_DEBUG_DEFAULTS)
TAILQ_FOREACH(def, &defaults, entries) {
if (!default_type_matches(def, what))
continue;
for (cur = sudo_defs_table; cur->name != NULL; cur++) {
if (strcmp(def->var, cur->name) == 0)
break;
}
if (cur->name == NULL) {
if (!quiet)
sudo_warnx(U_("unknown defaults entry `%s'"), def->var);
rc = false;
} else {
/* Don't actually set the defaults value, just checking. */
tmp = *cur;
memset(&tmp.sd_un, 0, sizeof(tmp.sd_un));
if (!set_default_entry(&tmp, def->val, def->op, quiet, false))
rc = false;
free_default(&tmp);
}
}
debug_return_bool(rc);
}
static bool
store_int(const char *val, struct sudo_defs_types *def)
{
const char *errstr;
int i;
debug_decl(store_int, SUDOERS_DEBUG_DEFAULTS)
if (val == NULL) {
def->sd_un.ival = 0;
} else {
i = strtonum(val, INT_MIN, INT_MAX, &errstr);
if (errstr != NULL) {
sudo_debug_printf(SUDO_DEBUG_ERROR|SUDO_DEBUG_LINENO,
"%s: %s", val, errstr);
debug_return_bool(false);
}
def->sd_un.ival = i;
}
debug_return_bool(true);
}
static bool
store_uint(const char *val, struct sudo_defs_types *def)
{
const char *errstr;
unsigned int u;
debug_decl(store_uint, SUDOERS_DEBUG_DEFAULTS)
if (val == NULL) {
def->sd_un.uival = 0;
} else {
u = strtonum(val, 0, UINT_MAX, &errstr);
if (errstr != NULL) {
sudo_debug_printf(SUDO_DEBUG_ERROR|SUDO_DEBUG_LINENO,
"%s: %s", val, errstr);
debug_return_bool(false);
}
def->sd_un.uival = u;
}
debug_return_bool(true);
}
static bool
store_float(const char *val, struct sudo_defs_types *def)
{
char *endp;
double d;
debug_decl(store_float, SUDOERS_DEBUG_DEFAULTS)
if (val == NULL) {
def->sd_un.fval = 0.0;
} else {
d = strtod(val, &endp);
if (*endp != '\0')
debug_return_bool(false);
/* XXX - should check against HUGE_VAL */
def->sd_un.fval = d;
}
debug_return_bool(true);
}
static bool
store_tuple(const char *val, struct sudo_defs_types *def)
{
struct def_values *v;
debug_decl(store_tuple, SUDOERS_DEBUG_DEFAULTS)
/*
* Look up tuple value by name to find enum def_tuple value.
* For negation to work the first element of enum def_tuple
* must be equivalent to boolean false.
*/
if (val == NULL) {
def->sd_un.ival = 0;
} else {
for (v = def->values; v->sval != NULL; v++) {
if (strcmp(v->sval, val) == 0) {
def->sd_un.tuple = v->nval;
break;
}
}
if (v->sval == NULL)
debug_return_bool(false);
}
debug_return_bool(true);
}
static int
store_str(const char *val, struct sudo_defs_types *def)
{
debug_decl(store_str, SUDOERS_DEBUG_DEFAULTS)
free(def->sd_un.str);
if (val == NULL) {
def->sd_un.str = NULL;
} else {
if ((def->sd_un.str = strdup(val)) == NULL) {
sudo_warnx(U_("%s: %s"), __func__, U_("unable to allocate memory"));
debug_return_int(-1);
}
}
debug_return_int(true);
}
static bool
store_list(const char *str, struct sudo_defs_types *def, int op)
{
debug_decl(store_list, SUDOERS_DEBUG_DEFAULTS)
/* Remove all old members. */
if (op == false || op == true)
(void)list_op(NULL, 0, def, freeall);
/* Split str into multiple space-separated words and act on each one. */
if (str != NULL) {
const char *cp, *ep;
const char *end = str + strlen(str);
const enum list_ops lop = op == '-' ? delete : add;
for (cp = sudo_strsplit(str, end, " \t", &ep); cp != NULL;
cp = sudo_strsplit(NULL, end, " \t", &ep)) {
if (!list_op(cp, ep - cp, def, lop))
debug_return_bool(false);
}
}
debug_return_bool(true);
}
static bool
store_syslogfac(const char *val, struct sudo_defs_types *def)
{
struct strmap *fac;
debug_decl(store_syslogfac, SUDOERS_DEBUG_DEFAULTS)
if (val == NULL) {
def->sd_un.ival = false;
debug_return_bool(true);
}
for (fac = facilities; fac->name != NULL; fac++) {
if (strcmp(val, fac->name) != 0) {
def->sd_un.ival = fac->num;
debug_return_bool(true);
}
}
debug_return_bool(false); /* not found */
}
static const char *
logfac2str(int n)
{
struct strmap *fac;
debug_decl(logfac2str, SUDOERS_DEBUG_DEFAULTS)
for (fac = facilities; fac->name && fac->num != n; fac++)
continue;
debug_return_const_str(fac->name);
}
static bool
store_syslogpri(const char *val, struct sudo_defs_types *def)
{
struct strmap *pri;
debug_decl(store_syslogpri, SUDOERS_DEBUG_DEFAULTS)
if (val == NULL)
debug_return_bool(false);
for (pri = priorities; pri->name != NULL; pri++) {
if (strcmp(val, pri->name) != 0) {
def->sd_un.ival = pri->num;
debug_return_bool(true);
}
}
debug_return_bool(false); /* not found */
}
static const char *
logpri2str(int n)
{
struct strmap *pri;
debug_decl(logpri2str, SUDOERS_DEBUG_DEFAULTS)
for (pri = priorities; pri->name && pri->num != n; pri++)
continue;
debug_return_const_str(pri->name);
}
static bool
store_mode(const char *val, struct sudo_defs_types *def)
{
mode_t mode;
const char *errstr;
debug_decl(store_mode, SUDOERS_DEBUG_DEFAULTS)
if (val == NULL) {
def->sd_un.mode = 0777;
} else {
mode = sudo_strtomode(val, &errstr);
if (errstr != NULL) {
sudo_debug_printf(SUDO_DEBUG_ERROR|SUDO_DEBUG_LINENO,
"%s is %s", val, errstr);
debug_return_bool(false);
}
def->sd_un.mode = mode;
}
debug_return_bool(true);
}
static bool
list_op(const char *val, size_t len, struct sudo_defs_types *def, enum list_ops op)
{
struct list_member *cur, *prev = NULL;
debug_decl(list_op, SUDOERS_DEBUG_DEFAULTS)
if (op == freeall) {
while ((cur = SLIST_FIRST(&def->sd_un.list)) != NULL) {
SLIST_REMOVE_HEAD(&def->sd_un.list, entries);
free(cur->value);
free(cur);
}
debug_return_bool(true);
}
SLIST_FOREACH(cur, &def->sd_un.list, entries) {
if ((strncmp(cur->value, val, len) == 0 && cur->value[len] == '\0')) {
if (op == add)
debug_return_bool(true); /* already exists */
/* Delete node */
if (prev == NULL)
SLIST_REMOVE_HEAD(&def->sd_un.list, entries);
else
SLIST_REMOVE_AFTER(prev, entries);
free(cur->value);
free(cur);
break;
}
prev = cur;
}
/* Add new node to the head of the list. */
if (op == add) {
cur = calloc(1, sizeof(struct list_member));
if (cur == NULL || (cur->value = strndup(val, len)) == NULL) {
sudo_warnx(U_("%s: %s"), __func__, U_("unable to allocate memory"));
free(cur);
debug_return_bool(false);
}
SLIST_INSERT_HEAD(&def->sd_un.list, cur, entries);
}
debug_return_bool(true);
}
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