857 B
857 B
Name
setuid, setgid - set user / group ID
Synopsis
#include <unistd.h>
int setuid(uid_t);
int setgid(gid_t);
Description
Sets all of real, effective, and saved user or group ID to the given ID.
For non-superusers, the given ID has to be equal to the current real or effective ID for the call to succeed.
Return value
If the call was set successful, returns 0.
Else, returns -1 and sets errno to describe the error.
Errors
EPERM: The new ID is not equal to the real ID or effective ID, and the user is not superuser.