mirror of
https://github.com/MariaDB/server.git
synced 2025-10-31 10:56:12 +01:00
82 lines
2 KiB
C
82 lines
2 KiB
C
#include <my_global.h>
|
|
#include <m_string.h>
|
|
#include <my_sys.h>
|
|
#include <my_pthread.h>
|
|
#ifdef HAVE_PWD_H
|
|
#include <pwd.h>
|
|
#endif
|
|
#ifdef HAVE_GRP_H
|
|
#include <grp.h>
|
|
#endif
|
|
|
|
struct passwd *my_check_user(const char *user, myf MyFlags)
|
|
{
|
|
struct passwd *user_info;
|
|
uid_t user_id= geteuid();
|
|
DBUG_ENTER("my_check_user");
|
|
|
|
// Don't bother if we aren't superuser
|
|
if (user_id)
|
|
{
|
|
if (user)
|
|
{
|
|
/* Don't give a warning, if real user is same as given with --user */
|
|
user_info= getpwnam(user);
|
|
if (!user_info || user_id != user_info->pw_uid)
|
|
{
|
|
my_errno= EPERM;
|
|
if (MyFlags & MY_WME)
|
|
my_printf_error(my_errno, "One can only use the --user switch if "
|
|
"running as root", MYF(ME_WARNING|ME_ERROR_LOG));
|
|
}
|
|
}
|
|
DBUG_RETURN(NULL);
|
|
}
|
|
if (!user)
|
|
{
|
|
if (MyFlags & MY_FAE)
|
|
{
|
|
my_errno= EINVAL;
|
|
my_printf_error(my_errno, "Please consult the Knowledge Base to find "
|
|
"out how to run mysqld as root!", MYF(ME_ERROR_LOG));
|
|
}
|
|
DBUG_RETURN(NULL);
|
|
}
|
|
if (!strcmp(user,"root"))
|
|
DBUG_RETURN(NULL);
|
|
|
|
if (!(user_info= getpwnam(user)))
|
|
{
|
|
// Allow a numeric uid to be used
|
|
int err= 0;
|
|
user_id= my_strtoll10(user, NULL, &err);
|
|
if (err || !(user_info= getpwuid(user_id)))
|
|
{
|
|
my_errno= EINVAL;
|
|
my_printf_error(my_errno, "Can't change to run as user '%s'. Please "
|
|
"check that the user exists!", MYF(ME_ERROR_LOG), user);
|
|
DBUG_RETURN(NULL);
|
|
}
|
|
}
|
|
DBUG_ASSERT(user_info);
|
|
DBUG_RETURN(user_info);
|
|
}
|
|
|
|
int my_set_user(const char *user, struct passwd *user_info, myf MyFlags)
|
|
{
|
|
DBUG_ENTER("my_set_user");
|
|
|
|
DBUG_ASSERT(user_info != 0);
|
|
#ifdef HAVE_INITGROUPS
|
|
initgroups(user, user_info->pw_gid);
|
|
#endif
|
|
if (setgid(user_info->pw_gid) == -1 || setuid(user_info->pw_uid) == -1)
|
|
{
|
|
my_errno= errno;
|
|
if (MyFlags & MY_WME)
|
|
my_printf_error(errno, "Cannot change uid/gid (errno: %d)", MYF(ME_ERROR_LOG),
|
|
errno);
|
|
DBUG_RETURN(my_errno);
|
|
}
|
|
DBUG_RETURN(0);
|
|
}
|