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00b6be9dfaa54479ce1decb1a5dcb56a3b4f92b9
sudo/plugins/sudoers/defaults.c
Todd C. Miller 00b6be9dfa Allow syslog priority to be negated or set to "none" to disable 
logging successes or failures.
2016-11-30 16:26:10 -07:00

1033 lines
26 KiB
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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 <sys/stat.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 },
{ "none", -1 },
{ NULL, -1 }
};
static struct early_default early_defaults[] = {
#ifdef FQDN
{ I_FQDN, true },
#else
{ I_FQDN },
#endif
{ I_MATCH_GROUP_BY_GID },
{ I_GROUP_PLUGIN },
{ I_RUNAS_DEFAULT },
{ I_SUDOERS_LOCALE },
{ -1 }
};
/*
* Local prototypes.
*/
static bool store_int(const char *str, union sudo_defs_val *sd_un);
static bool store_list(const char *str, union sudo_defs_val *sd_un, int op);
static bool store_mode(const char *str, union sudo_defs_val *sd_un);
static int store_str(const char *str, union sudo_defs_val *sd_un);
static bool store_syslogfac(const char *str, union sudo_defs_val *sd_un);
static bool store_syslogpri(const char *str, union sudo_defs_val *sd_un);
static bool store_tuple(const char *str, union sudo_defs_val *sd_un, struct def_values *tuple_vals);
static bool store_uint(const char *str, union sudo_defs_val *sd_un);
static bool store_float(const char *str, union sudo_defs_val *sd_un);
static bool list_op(const char *str, size_t, union sudo_defs_val *sd_un, enum list_ops op);
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;
}
/*
* Find the index of the specified Defaults name in sudo_defs_table[]
* On success, returns the matching index or -1 on failure.
*/
static int
find_default(const char *name, const char *file, int lineno, bool quiet)
{
int i;
debug_decl(find_default, SUDOERS_DEBUG_DEFAULTS)
for (i = 0; sudo_defs_table[i].name != NULL; i++) {
if (strcmp(name, sudo_defs_table[i].name) == 0)
debug_return_int(i);
}
if (!quiet) {
if (lineno > 0) {
sudo_warnx(U_("%s:%d unknown defaults entry \"%s\""),
file, lineno, name);
} else {
sudo_warnx(U_("%s: unknown defaults entry \"%s\""),
file, name);
}
}
debug_return_int(-1);
}
/*
* Parse a defaults entry, storing the parsed entry in sd_un.
* Returns true on success or false on failure.
*/
static bool
parse_default_entry(struct sudo_defs_types *def, const char *val, int op,
union sudo_defs_val *sd_un, const char *file, int lineno, bool quiet)
{
int rc;
debug_decl(parse_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) {
if (lineno > 0) {
sudo_warnx(U_("%s:%d no value specified for \"%s\""),
file, lineno, def->name);
} else {
sudo_warnx(U_("%s: no value specified for \"%s\""),
file, def->name);
}
}
debug_return_bool(false);
}
}
switch (def->type & T_MASK) {
case T_LOGFAC:
rc = store_syslogfac(val, sd_un);
break;
case T_LOGPRI:
rc = store_syslogpri(val, sd_un);
break;
case T_STR:
if (ISSET(def->type, T_PATH) && val != NULL && *val != '/') {
if (!quiet) {
if (lineno > 0) {
sudo_warnx(U_("%s:%d values for \"%s\" must start with a '/'"),
file, lineno, def->name);
} else {
sudo_warnx(U_("%s: values for \"%s\" must start with a '/'"),
file, def->name);
}
}
rc = -1;
break;
}
rc = store_str(val, sd_un);
break;
case T_INT:
rc = store_int(val, sd_un);
break;
case T_UINT:
rc = store_uint(val, sd_un);
break;
case T_FLOAT:
rc = store_float(val, sd_un);
break;
case T_MODE:
rc = store_mode(val, sd_un);
break;
case T_FLAG:
if (val != NULL) {
if (!quiet) {
if (lineno > 0) {
sudo_warnx(U_("%s:%d option \"%s\" does not take a value"),
file, lineno, def->name);
} else {
sudo_warnx(U_("%s: option \"%s\" does not take a value"),
file, def->name);
}
}
rc = -1;
break;
}
sd_un->flag = op;
rc = true;
break;
case T_LIST:
rc = store_list(val, sd_un, op);
break;
case T_TUPLE:
rc = store_tuple(val, sd_un, def->values);
break;
default:
if (!quiet) {
if (lineno > 0) {
sudo_warnx(U_("%s:%d invalid Defaults type 0x%x for option \"%s\""),
file, lineno, def->type, def->name);
} else {
sudo_warnx(U_("%s: invalid Defaults type 0x%x for option \"%s\""),
file, def->type, def->name);
}
}
rc = -1;
break;
}
if (rc == false) {
if (!quiet) {
if (lineno > 0) {
sudo_warnx(U_("%s:%d value \"%s\" is invalid for option \"%s\""),
file, lineno, val, def->name);
} else {
sudo_warnx(U_("%s: value \"%s\" is invalid for option \"%s\""),
file, val, def->name);
}
}
}
debug_return_bool(rc == true);
}
struct early_default *
is_early_default(const char *name)
{
struct early_default *early;
debug_decl(is_early_default, SUDOERS_DEBUG_DEFAULTS)
for (early = early_defaults; early->idx != -1; early++) {
if (strcmp(name, sudo_defs_table[early->idx].name) == 0)
debug_return_ptr(early);
}
debug_return_ptr(NULL);
}
static bool
run_callback(struct sudo_defs_types *def)
{
debug_decl(run_callback, SUDOERS_DEBUG_DEFAULTS)
if (def->callback == NULL)
debug_return_bool(true);
debug_return_bool(def->callback(&def->sd_un));
}
/*
* 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, const char *file,
int lineno, bool quiet)
{
int idx;
debug_decl(set_default, SUDOERS_DEBUG_DEFAULTS)
idx = find_default(var, file, lineno, quiet);
if (idx != -1) {
/* Set parsed value in sudo_defs_table and run callback (if any). */
struct sudo_defs_types *def = &sudo_defs_table[idx];
if (parse_default_entry(def, val, op, &def->sd_un, file, lineno, quiet))
debug_return_bool(run_callback(def));
}
debug_return_bool(false);
}
/*
* 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, const char *file,
int lineno, bool quiet, struct early_default *early)
{
int idx;
debug_decl(set_early_default, SUDOERS_DEBUG_DEFAULTS)
idx = find_default(var, file, lineno, quiet);
if (idx != -1) {
/* Set parsed value in sudo_defs_table but defer callback (if any). */
struct sudo_defs_types *def = &sudo_defs_table[idx];
if (parse_default_entry(def, val, op, &def->sd_un, file, lineno, quiet)) {
early->run_callback = true;
debug_return_bool(true);
}
}
debug_return_bool(false);
}
/*
* Run callbacks for early defaults.
*/
bool
run_early_defaults(void)
{
struct early_default *early;
bool ret = true;
debug_decl(run_early_defaults, SUDOERS_DEBUG_DEFAULTS)
for (early = early_defaults; early->idx != -1; early++) {
if (early->run_callback) {
if (!run_callback(&sudo_defs_table[early->idx]))
ret = false;
early->run_callback = false;
}
}
debug_return_bool(ret);
}
static void
free_default(int type, union sudo_defs_val *sd_un)
{
switch (type & T_MASK) {
case T_STR:
free(sd_un->str);
break;
case T_LIST:
(void)list_op(NULL, 0, sd_un, freeall);
break;
}
memset(sd_un, 0, sizeof(*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->type, &def->sd_un);
}
/* 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;
def_iolog_mode = S_IRUSR|S_IWUSR;
/* Syslog options need special care since they both strings and ints */
#if (LOGGING & SLOG_SYSLOG)
(void) store_syslogfac(LOGFAC, &sudo_defs_table[I_SYSLOG].sd_un);
(void) store_syslogpri(PRI_SUCCESS, &sudo_defs_table[I_SYSLOG_GOODPRI].sd_un);
(void) store_syslogpri(PRI_FAILURE, &sudo_defs_table[I_SYSLOG_BADPRI].sd_un);
#endif
/* Password flags also have a string and integer component. */
(void) store_tuple("any", &sudo_defs_table[I_LISTPW].sd_un, sudo_defs_table[I_LISTPW].values);
(void) store_tuple("all", &sudo_defs_table[I_VERIFYPW].sd_un, sudo_defs_table[I_VERIFYPW].values);
/* Then initialize the int-like things. */
#ifdef SUDO_UMASK
def_umask = SUDO_UMASK;
#else
def_umask = ACCESSPERMS;
#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 *d, int what)
{
debug_decl(default_type_matches, SUDOERS_DEBUG_DEFAULTS)
switch (d->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 *d, int what)
{
debug_decl(default_binding_matches, SUDOERS_DEBUG_DEFAULTS)
switch (d->type) {
case DEFAULTS:
debug_return_bool(true);
break;
case DEFAULTS_USER:
if (userlist_matches(sudo_user.pw, d->binding) == ALLOW)
debug_return_bool(true);
break;
case DEFAULTS_RUNAS:
if (runaslist_matches(d->binding, NULL, NULL, NULL) == ALLOW)
debug_return_bool(true);
break;
case DEFAULTS_HOST:
if (hostlist_matches(sudo_user.pw, d->binding) == ALLOW)
debug_return_bool(true);
break;
case DEFAULTS_CMND:
if (cmndlist_matches(d->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 *d;
bool ret = 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(d, &defaults, entries) {
struct early_default *early = is_early_default(d->var);
if (early == NULL)
continue;
/* Defaults type and binding must match. */
if (!default_type_matches(d, what) ||
!default_binding_matches(d, what))
continue;
/* Copy the value to sudo_defs_table and mark as early. */
if (!set_early_default(d->var, d->val, d->op, d->file, d->lineno,
quiet, early))
ret = false;
}
/* Run callbacks for early defaults (if any) */
if (!run_early_defaults())
ret = false;
/*
* Then set the rest of the defaults.
*/
TAILQ_FOREACH(d, &defaults, entries) {
/* Skip Defaults marked as early, we already did them. */
if (is_early_default(d->var))
continue;
/* Defaults type and binding must match. */
if (!default_type_matches(d, what) ||
!default_binding_matches(d, what))
continue;
/* Copy the value to sudo_defs_table and run callback (if any) */
if (!set_default(d->var, d->val, d->op, d->file, d->lineno, quiet))
ret = false;
}
debug_return_bool(ret);
}
/*
* Check all defaults entries without actually setting them.
*/
bool
check_defaults(bool quiet)
{
struct defaults *d;
bool ret = true;
int idx;
debug_decl(check_defaults, SUDOERS_DEBUG_DEFAULTS)
TAILQ_FOREACH(d, &defaults, entries) {
idx = find_default(d->var, d->file, d->lineno, quiet);
if (idx != -1) {
struct sudo_defs_types *def = &sudo_defs_table[idx];
union sudo_defs_val sd_un;
memset(&sd_un, 0, sizeof(sd_un));
if (parse_default_entry(def, d->val, d->op, &sd_un, d->file,
d->lineno, quiet)) {
free_default(def->type, &sd_un);
continue;
}
}
/* There was an error in the entry, flag it. */
d->error = true;
ret = false;
}
debug_return_bool(ret);
}
static bool
store_int(const char *str, union sudo_defs_val *sd_un)
{
const char *errstr;
int i;
debug_decl(store_int, SUDOERS_DEBUG_DEFAULTS)
if (str == NULL) {
sd_un->ival = 0;
} else {
i = strtonum(str, INT_MIN, INT_MAX, &errstr);
if (errstr != NULL) {
sudo_debug_printf(SUDO_DEBUG_ERROR|SUDO_DEBUG_LINENO,
"%s: %s", str, errstr);
debug_return_bool(false);
}
sd_un->ival = i;
}
debug_return_bool(true);
}
static bool
store_uint(const char *str, union sudo_defs_val *sd_un)
{
const char *errstr;
unsigned int u;
debug_decl(store_uint, SUDOERS_DEBUG_DEFAULTS)
if (str == NULL) {
sd_un->uival = 0;
} else {
u = strtonum(str, 0, UINT_MAX, &errstr);
if (errstr != NULL) {
sudo_debug_printf(SUDO_DEBUG_ERROR|SUDO_DEBUG_LINENO,
"%s: %s", str, errstr);
debug_return_bool(false);
}
sd_un->uival = u;
}
debug_return_bool(true);
}
static bool
store_float(const char *str, union sudo_defs_val *sd_un)
{
char *endp;
double d;
debug_decl(store_float, SUDOERS_DEBUG_DEFAULTS)
if (str == NULL) {
sd_un->fval = 0.0;
} else {
d = strtod(str, &endp);
if (*endp != '\0')
debug_return_bool(false);
/* XXX - should check against HUGE_VAL */
sd_un->fval = d;
}
debug_return_bool(true);
}
static bool
store_tuple(const char *str, union sudo_defs_val *sd_un,
struct def_values *tuple_vals)
{
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 (str == NULL) {
sd_un->ival = 0;
} else {
for (v = tuple_vals; v->sval != NULL; v++) {
if (strcmp(v->sval, str) == 0) {
sd_un->tuple = v->nval;
break;
}
}
if (v->sval == NULL)
debug_return_bool(false);
}
debug_return_bool(true);
}
static int
store_str(const char *str, union sudo_defs_val *sd_un)
{
debug_decl(store_str, SUDOERS_DEBUG_DEFAULTS)
free(sd_un->str);
if (str == NULL) {
sd_un->str = NULL;
} else {
if ((sd_un->str = strdup(str)) == 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, union sudo_defs_val *sd_un, int op)
{
debug_decl(store_list, SUDOERS_DEBUG_DEFAULTS)
/* Remove all old members. */
if (op == false || op == true)
(void)list_op(NULL, 0, sd_un, 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, sd_un, lop))
debug_return_bool(false);
}
}
debug_return_bool(true);
}
static bool
store_syslogfac(const char *str, union sudo_defs_val *sd_un)
{
struct strmap *fac;
debug_decl(store_syslogfac, SUDOERS_DEBUG_DEFAULTS)
if (str == NULL) {
sd_un->ival = false;
debug_return_bool(true);
}
for (fac = facilities; fac->name != NULL; fac++) {
if (strcmp(str, fac->name) != 0) {
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 *str, union sudo_defs_val *sd_un)
{
struct strmap *pri;
debug_decl(store_syslogpri, SUDOERS_DEBUG_DEFAULTS)
if (str == NULL) {
sd_un->ival = -1;
debug_return_bool(true);
}
for (pri = priorities; pri->name != NULL; pri++) {
if (strcmp(str, pri->name) != 0) {
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 != NULL; pri++) {
if (pri->num == n)
debug_return_const_str(pri->name);
}
debug_return_const_str("unknown");
}
static bool
store_mode(const char *str, union sudo_defs_val *sd_un)
{
mode_t mode;
const char *errstr;
debug_decl(store_mode, SUDOERS_DEBUG_DEFAULTS)
if (str == NULL) {
sd_un->mode = ACCESSPERMS;
} else {
mode = sudo_strtomode(str, &errstr);
if (errstr != NULL) {
sudo_debug_printf(SUDO_DEBUG_ERROR|SUDO_DEBUG_LINENO,
"%s is %s", str, errstr);
debug_return_bool(false);
}
sd_un->mode = mode;
}
debug_return_bool(true);
}
static bool
list_op(const char *str, size_t len, union sudo_defs_val *sd_un,
enum list_ops op)
{
struct list_member *cur, *prev = NULL;
debug_decl(list_op, SUDOERS_DEBUG_DEFAULTS)
if (op == freeall) {
while ((cur = SLIST_FIRST(&sd_un->list)) != NULL) {
SLIST_REMOVE_HEAD(&sd_un->list, entries);
free(cur->value);
free(cur);
}
debug_return_bool(true);
}
SLIST_FOREACH(cur, &sd_un->list, entries) {
if ((strncmp(cur->value, str, len) == 0 && cur->value[len] == '\0')) {
if (op == add)
debug_return_bool(true); /* already exists */
/* Delete node */
if (prev == NULL)
SLIST_REMOVE_HEAD(&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(str, len)) == NULL) {
sudo_warnx(U_("%s: %s"), __func__, U_("unable to allocate memory"));
free(cur);
debug_return_bool(false);
}
SLIST_INSERT_HEAD(&sd_un->list, cur, entries);
}
debug_return_bool(true);
}
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