/* split the line to command and arguments */
static char *line_get_command(const char *line, char **args, int aliases)
{
const char *ptr, *cmdargs;
char *cmd, *checkcmd;
g_return_val_if_fail(line != NULL, NULL);
g_return_val_if_fail(args != NULL, NULL);
cmd = checkcmd = NULL; *args = "";
cmdargs = NULL; ptr = line;
do {
ptr = strchr(ptr, ' ');
if (ptr == NULL) {
checkcmd = g_strdup(line);
cmdargs = "";
} else {
checkcmd = g_strndup(line, (int) (ptr-line));
while (*ptr == ' ') ptr++;
cmdargs = ptr;
}
if (aliases ? !alias_find(checkcmd) :
!command_find(checkcmd)) {
/* not found, use the previous */
g_free(checkcmd);
break;
}
/* found, check if it has subcommands */
g_free_not_null(cmd);
if (!aliases)
cmd = checkcmd;
else {
cmd = g_strdup(alias_find(checkcmd));
g_free(checkcmd);
}
*args = (char *) cmdargs;
} while (ptr != NULL);
if (cmd != NULL)
ascii_strdown(cmd);
return cmd;
}
static void sig_complete_alias(GList **list, WINDOW_REC *window,
const char *word, const char *line,
int *want_space)
{
const char *definition;
g_return_if_fail(list != NULL);
g_return_if_fail(word != NULL);
g_return_if_fail(line != NULL);
if (*line != '\0') {
if ((definition = alias_find(line)) != NULL) {
*list = g_list_append(NULL, g_strdup(definition));
signal_stop();
}
} else {
*list = completion_get_aliases(word);
if (*list != NULL) signal_stop();
}
}
/*
* Check for host and shost in a list of members.
* Returns ALLOW, DENY or UNSPEC.
*/
static int
_hostlist_matches(struct member_list *list)
{
struct member *m;
struct alias *a;
int rval, matched = UNSPEC;
tq_foreach_rev(list, m) {
switch (m->type) {
case ALL:
matched = !m->negated;
break;
case NETGROUP:
if (netgr_matches(m->name, user_host, user_shost, NULL))
matched = !m->negated;
break;
case NTWKADDR:
if (addr_matches(m->name))
matched = !m->negated;
break;
case ALIAS:
if ((a = alias_find(m->name, HOSTALIAS)) != NULL) {
rval = _hostlist_matches(&a->members);
if (rval != UNSPEC)
matched = m->negated ? !rval : rval;
break;
}
/* FALLTHROUGH */
case WORD:
if (hostname_matches(user_shost, user_host, m->name))
matched = !m->negated;
break;
}
if (matched != UNSPEC)
break;
}
return matched;
}
/*
* Check for user described by pw in a list of members.
* Returns ALLOW, DENY or UNSPEC.
*/
static int
_userlist_matches(struct passwd *pw, struct member_list *list)
{
struct member *m;
struct alias *a;
int rval, matched = UNSPEC;
tq_foreach_rev(list, m) {
switch (m->type) {
case ALL:
matched = !m->negated;
break;
case NETGROUP:
if (netgr_matches(m->name, NULL, NULL, pw->pw_name))
matched = !m->negated;
break;
case USERGROUP:
if (usergr_matches(m->name, pw->pw_name, pw))
matched = !m->negated;
break;
case ALIAS:
if ((a = alias_find(m->name, USERALIAS)) != NULL) {
rval = _userlist_matches(pw, &a->members);
if (rval != UNSPEC)
matched = m->negated ? !rval : rval;
break;
}
/* FALLTHROUGH */
case WORD:
if (userpw_matches(m->name, pw->pw_name, pw))
matched = !m->negated;
break;
}
if (matched != UNSPEC)
break;
}
return matched;
}
/*
* Check for user described by pw in a list of members.
* If both lists are empty compare against def_runas_default.
* Returns ALLOW, DENY or UNSPEC.
*/
static int
_runaslist_matches(struct member_list *user_list, struct member_list *group_list)
{
struct member *m;
struct alias *a;
int rval;
int user_matched = UNSPEC;
int group_matched = UNSPEC;
if (runas_pw != NULL) {
/* If no runas user or runas group listed in sudoers, use default. */
if (tq_empty(user_list) && tq_empty(group_list))
return userpw_matches(def_runas_default, runas_pw->pw_name, runas_pw);
tq_foreach_rev(user_list, m) {
switch (m->type) {
case ALL:
user_matched = !m->negated;
break;
case NETGROUP:
if (netgr_matches(m->name, NULL, NULL, runas_pw->pw_name))
user_matched = !m->negated;
break;
case USERGROUP:
if (usergr_matches(m->name, runas_pw->pw_name, runas_pw))
user_matched = !m->negated;
break;
case ALIAS:
if ((a = alias_find(m->name, RUNASALIAS)) != NULL) {
rval = _runaslist_matches(&a->members, &empty);
if (rval != UNSPEC)
user_matched = m->negated ? !rval : rval;
break;
}
/* FALLTHROUGH */
case WORD:
if (userpw_matches(m->name, runas_pw->pw_name, runas_pw))
user_matched = !m->negated;
break;
}
if (user_matched != UNSPEC)
break;
}
}
if (runas_gr != NULL) {
if (user_matched == UNSPEC) {
if (runas_pw == NULL || strcmp(runas_pw->pw_name, user_name) == 0)
user_matched = ALLOW; /* only changing group */
}
tq_foreach_rev(group_list, m) {
switch (m->type) {
case ALL:
group_matched = !m->negated;
break;
case ALIAS:
if ((a = alias_find(m->name, RUNASALIAS)) != NULL) {
rval = _runaslist_matches(&a->members, &empty);
if (rval != UNSPEC)
group_matched = m->negated ? !rval : rval;
break;
}
/* FALLTHROUGH */
case WORD:
if (group_matches(m->name, runas_gr))
group_matched = !m->negated;
break;
}
if (group_matched != UNSPEC)
break;
}
if (group_matched == UNSPEC) {
if (runas_pw != NULL && runas_pw->pw_gid == runas_gr->gr_gid)
group_matched = ALLOW; /* runas group matches passwd db */
}
}
if (user_matched == DENY || group_matched == DENY)
return DENY;
if (user_matched == group_matched || runas_gr == NULL)
return user_matched;
return UNSPEC;
}