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serenity/Base/usr/share/man/man2/setuid.md
kleines Filmröllchen 98c0c5e9e6 Help+Base: Add help://man URLs for links between man pages 
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.
2022-01-11 00:24:57 +01:00

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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. Otherwise, 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.
  • EINVAL: The new ID is set to invalid value (-1).

See also