#include <config.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <stdio.h>
#include <stdlib.h>
#ifdef HAVE_STDBOOL_H
# include <stdbool.h>
#else
# include "compat/stdbool.h"
#endif
#ifdef HAVE_STRING_H
# include <string.h>
#endif
#ifdef HAVE_STRINGS_H
# include <strings.h>
#endif
#include <unistd.h>
#include <ctype.h>
#include <errno.h>
#include <fcntl.h>
#include <limits.h>
#include <grp.h>
#include <pwd.h>
#include "sudo_compat.h"
#include "sudo_dso.h"
#include "sudo_plugin.h"
#include "sudo_util.h"
static sudo_printf_t sudo_log;
typedef struct group * (*sysgroup_getgrnam_t)(const char *);
typedef struct group * (*sysgroup_getgrgid_t)(gid_t);
typedef void (*sysgroup_gr_delref_t)(struct group *);
static sysgroup_getgrnam_t sysgroup_getgrnam;
static sysgroup_getgrgid_t sysgroup_getgrgid;
static sysgroup_gr_delref_t sysgroup_gr_delref;
static bool need_setent;
static int
sysgroup_init(int version, sudo_printf_t sudo_printf, char *const argv[])
{
void *handle;
sudo_log = sudo_printf;
if (SUDO_API_VERSION_GET_MAJOR(version) != GROUP_API_VERSION_MAJOR) {
sudo_log(SUDO_CONV_ERROR_MSG,
"sysgroup_group: incompatible major version %d, expected %d\n",
SUDO_API_VERSION_GET_MAJOR(version),
GROUP_API_VERSION_MAJOR);
return -1;
}
handle = sudo_dso_findsym(SUDO_DSO_DEFAULT, "sudo_getgrnam");
if (handle != NULL) {
sysgroup_getgrnam = (sysgroup_getgrnam_t)handle;
} else {
sysgroup_getgrnam = (sysgroup_getgrnam_t)getgrnam;
need_setent = true;
}
handle = sudo_dso_findsym(SUDO_DSO_DEFAULT, "sudo_getgrgid");
if (handle != NULL) {
sysgroup_getgrgid = (sysgroup_getgrgid_t)handle;
} else {
sysgroup_getgrgid = (sysgroup_getgrgid_t)getgrgid;
need_setent = true;
}
handle = sudo_dso_findsym(SUDO_DSO_DEFAULT, "sudo_gr_delref");
if (handle != NULL)
sysgroup_gr_delref = (sysgroup_gr_delref_t)handle;
if (need_setent)
setgrent();
return true;
}
static void
sysgroup_cleanup(void)
{
if (need_setent)
endgrent();
}
static int
sysgroup_query(const char *user, const char *group, const struct passwd *pwd)
{
char **member;
struct group *grp;
grp = sysgroup_getgrnam(group);
if (grp == NULL && group[0] == '#' && group[1] != '\0') {
const char *errstr;
gid_t gid = sudo_strtoid(group + 1, &errstr);
if (errstr == NULL)
grp = sysgroup_getgrgid(gid);
}
if (grp != NULL) {
if (grp->gr_mem != NULL) {
for (member = grp->gr_mem; *member != NULL; member++) {
if (strcasecmp(user, *member) == 0) {
if (sysgroup_gr_delref)
sysgroup_gr_delref(grp);
return true;
}
}
}
if (sysgroup_gr_delref)
sysgroup_gr_delref(grp);
}
return false;
}
__dso_public struct sudoers_group_plugin group_plugin = {
GROUP_API_VERSION,
sysgroup_init,
sysgroup_cleanup,
sysgroup_query
};