#Name

setresuid, setresgid - set real, effective, and saved user / group ID

#Synopsis

#include <unistd.h>

int setresuid(uid_t, uid_t, uid_t);
int setresgid(gid_t, gid_t, gid_t);

#Description

Sets all of real, effective, and saved user or group ID to the given values.

An argument of -1 keeps the corresponding ID unchanged.

For non-superusers, each of the given values has to be equal to any of the current real, effective, or saved IDs for the call to succeed.

#Return value

If the call was set successful, returns 0. Otherwise, returns -1 and sets errno to describe the error.

#Errors

• EPERM: At least one of the passed IDs was not equal to the current real, effective, or saved ID, and the user is not superuser.

#See also

• setuid_overview(7)
• geteuid(2) / getegid(2)
• getuid(2) / getgid(2)
• getresuid(2) / getresgid(2)
• seteuid(2) / setegid(2)
• setuid(2) / setgid(2)