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setresuid(2)							  setresuid(2)

NAME
       setresuid,  setresgid  -	 set real, effective, and saved user and group
       IDs

SYNOPSIS
DESCRIPTION
       sets the real, effective and/or saved user ID of the calling process.

       If the current real, effective or saved user ID is equal to that	 of  a
       user  having appropriate privileges, sets the real, effective and saved
       user IDs to ruid, euid, and suid, respectively.	Otherwise,  only  sets
       the  real,  effective,  and saved user IDs if ruid, euid, and suid each
       match at least one of the current real, effective, or saved user IDs.

       If ruid, euid, or suid is leaves the current real, effective  or	 saved
       user ID unchanged.

       sets the real, effective and/or saved group ID of the calling process.

       If  the	current real, effective or saved user ID is equal to that of a
       user having appropriate privileges, sets the real, effective, and saved
       group  ID  to rgid, egid, and sgid, respectively.  Otherwise, only sets
       the real, effective and saved group ID if rgid,	egid,  and  sgid  each
       match at least one of the current real, effective or saved group ID.

       If  rgid,  egid, or sgid is leaves the current real, effective or saved
       group ID unchanged.

   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	privi‐
       lege, depending on system 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 if any of the following conditions are encountered:

	      ruid,	     euid,  or	suid  (rgid,  egid,  or sgid) is not a
			     valid user (group) ID.

	      None of the conditions above are met.

AUTHOR
       and were developed by HP.

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

								  setresuid(2)

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