98c0c5e9e6
The URLs of the form `help://man/<section>/<page>` link to another help page inside the help application. All previous relative page links are replaced by this new form. This doesn't change any behavior but it looks much nicer :^) Note that man doesn't handle these new links, but the previous relative links didn't work either.
1 KiB
1 KiB
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.EINVAL: The new ID is set to invalid value (-1).