setuid man page on HP-UX

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setuid(2)							     setuid(2)

NAME
       setuid(), setgid() - set user and group IDs

SYNOPSIS
DESCRIPTION
       sets  the  real-user-ID (ruid), effective-user-ID (euid), and/or saved-
       user-ID (suid) of the calling process.	If  the	 Security  Containment
       product	is  installed, these interfaces treat a process observing as a
       privileged process.  Otherwise, only processes with an euid of zero are
       treated	as  privileged processes.  See privileges(5) for more informa‐
       tion on Security Containment and fine-grained privileges.

       The following conditions govern setuid's behavior:

	      ·	 If the process is privileged, sets the ruid, euid,  and  suid
		 to uid.

	      ·	 If  the  process  is  not  privileged and the argument uid is
		 equal to the ruid or the suid, sets the euid to uid; the ruid
		 and  suid remain unchanged.  (If a set-user-ID program is not
		 running as superuser, it can change its  euid	to  match  its
		 ruid and reset itself to the previous euid value.)

	      ·	 If  the  process is not privileged, the argument uid is equal
		 to the euid, and the calling process has the privilege,  sets
		 the ruid to uid; the euid and suid remain unchanged.

       sets the real-group-ID (rgid), effective-group-ID (egid), and/or saved-
       group-ID (sgid) of the calling process.	The following conditions  gov‐
       ern behavior:

	      ·	 If the process is privileged, sets the rgid and egid to gid.

	      ·	 If  the  process  is  not  privileged and the argument gid is
		 equal to the rgid or the sgid, sets the egid to gid; the rgid
		 and sgid remain unchanged.

	      ·	 If  the  process is not privileged, the argument gid is equal
		 to the egid, and the calling process has the privilege,  sets
		 the rgid to gid; the egid and sgid remain unchanged.

   Security Restrictions
       Some or all of the actions associated with this system call require the
       privilege.  Processes owned by the superuser have this privilege.  Pro‐
       cesses  owned by other users may have this privilege, depending on sys‐
       tem configuration.

       See privileges(5) for more information about privileged access on  sys‐
       tems that support fine-grained privileges.

RETURN VALUE
       Upon successful completion, and return 0; otherwise, they return −1 and
       set to indicate the error.

ERRORS
       and fail and return −1 if any of the following conditions  are  encoun‐
       tered:

	      None of the conditions above are met.

	      uid	     (gid) is not a valid user (group) ID.

WARNINGS
       It is recommended that the capability be avoided, as it is provided for
       backward compatibility.	This feature may be modified or	 dropped  from
       future  HP-UX  releases.	 When changing the real user ID and real group
       ID, use of and (see setresuid(2)) is recommended instead.

AUTHOR
       was developed by AT&T, the University of California, Berkeley, and HP.

       was developed by AT&T.

SEE ALSO
       exec(2), getuid(2), setresuid(2), privileges(5).

STANDARDS CONFORMANCE
								     setuid(2)
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