935 B
935 B
Name
seteuid, setegid - set effective user / group ID
Synopsis
#include <unistd.h>
int seteuid(uid_t);
int setegid(gid_t);
Description
Sets the effective user or group ID.
For non-superusers, the effective ID can only be set to the current real or saved ID.
In particular, seteuid(geteuid()) will fail if the current effective user ID is not equal to the current real or saved ID.
Return value
If the call was set successful, returns 0.
Otherwise, returns -1 and sets errno to describe the error.
Errors
EPERM: The new ID is not equal to the real ID or saved ID, and the user is not superuser.