setgid(2) [hpux man page]

setuid(2)							System Calls Manual							 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 information on Security Containment and fine-grained privileges.

       The following conditions govern setuid's behavior:

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

	      o  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.)

	      o  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
       govern behavior:

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

	      o  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.

	      o  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.
       Processes owned by other users may have this privilege, depending on system configuration.

       See privileges(5) for more information about privileged access on systems 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 encountered:

	      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)

Check Out this Related Man Page

setregid(2)							System Calls Manual						       setregid(2)

NAME

       setregid - sets the real and effective group IDs

SYNOPSIS


DESCRIPTION

       sets the real and effective group IDs of the calling process.

       Only  a privileged process can set the real group ID and/or the effective group ID to any valid value.  A nonprivileged process can set the
       real group ID to the saved set-group-ID from one of the exec family of functions, or the effective group ID to either the saved	set-group-
       ID or the real group ID.

       Any supplementary group IDs of the calling process remain unchanged.

       Argument rgid is the read group ID value to be set with.  If rgid is set to the real group ID is not be changed.

       Argument egid is the effective group ID value to be set with.  If egid is set to -1, the effective group ID is not changed.

       The real and effective group IDs may be set to different values in the same call.

   Security Restrictions
       Some  or  all  of  the actions associated with this system call require the privilege (CHSUBJIDENT).  Processes owned by the superuser will
       have this privilege.  Processes owned by other users may have this privilege, depending on system configuration.

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

RETURN VALUE

       Upon successful completion is set to Otherwise, errno is set to indicate the type of error and neither group IDs are changed.

ERRORS

       is set to one of the following values if the corresponding condition is detected.

       The value of the
		      rgid or egid argument is invalid or out-of-range.

       The process does NOT have all the appropriate privileges other
		      than to change the real group ID to the saved set-group-ID, or to change the effective group ID to either the real group	ID
		      or the saved set-group-ID.

AUTHOR

       was developed by the University of California, Berkeley and HP.

SEE ALSO

       exec(2), geteuid(2), getgid(2), getuid(2), setegid(2), setgid(2), setreuid(2), setuid(2).

																       setregid(2)

Linux and UNIX Man Pages

setgid(2) [hpux man page]

Check Out this Related Man Page