Man page or keyword search:   man All Sections 1 - General Commands 2 - System Calls 3 - Subroutines, Functions 4 - Special Files 5 - File Formats 6 - Games and Screensavers 7 - Macros and Conventions 8 - Maintenence Commands 9 - Kernel Interface New Commands Server 4.4BSD AIX Alpinelinux Archlinux Aros BSDOS BSDi Bifrost CentOS Cygwin Darwin Debian DigitalUNIX DragonFly ElementaryOS Fedora FreeBSD Gentoo GhostBSD HP-UX Haiku Hurd IRIX Inferno JazzOS Kali Knoppix LinuxMint MacOSX Mageia Mandriva Manjaro Minix MirBSD NeXTSTEP NetBSD OPENSTEP OSF1 OpenBSD OpenDarwin OpenIndiana OpenMandriva OpenServer OpenSuSE OpenVMS Oracle PC-BSD Peanut Pidora Plan9 QNX Raspbian RedHat Scientific Slackware SmartOS Solaris SuSE SunOS Syllable Tru64 UNIXv7 Ubuntu Ultrix UnixWare Xenix YellowDog aLinux   8420 pages apropos Keyword Search (all sections) Output format html ascii pdf view pdf save postscript

SETEGID(2)		   Linux Programmer's Manual		    SETEGID(2)

NAME
       seteuid, setegid - set effective user or group ID

SYNOPSIS
       #include <sys/types.h>
       #include <unistd.h>

       int seteuid(uid_t euid);
       int setegid(gid_t egid);

DESCRIPTION
       seteuid()  sets the effective user ID of the current process.  Unprivi‐
       leged user processes may only set the effective user  ID	 to  the  real
       user ID, the effective user ID or the saved set-user-ID.

       Precisely the same holds for setegid() with "group" instead of "user".

RETURN VALUE
       On  success,  zero is returned.	On error, -1 is returned, and errno is
       set appropriately.

ERRORS
       EPERM  The current process is not privileged (Linux: does not have  the
	      CAP_SETUID  capability in the case of seteuid(), or the CAP_SET‐
	      GID capability in the case of setegid()) and euid (resp.	 egid)
	      is  not the real user (group) ID, the effective user (group) ID,
	      or the saved set-user-ID (saved set-group-ID).

NOTES
       Setting the effective user (group) ID to the saved  set-user-ID	(saved
       set-group-ID) is possible since Linux 1.1.37 (1.1.38).  On an arbitrary
       system one should check _POSIX_SAVED_IDS.

       Under  libc4,  libc5  and  glibc2.0  seteuid(euid)  is  equivalent   to
       setreuid(-1,  euid)  and hence may change the saved set-user-ID.	 Under
       glibc2.1 it is equivalent to setresuid(-1, euid,-1) and hence does  not
       change the saved set-user-ID.  Similar remarks hold for setegid().

CONFORMING TO
       4.3BSD, POSIX.1-2001.

SEE ALSO
       geteuid(2), setresuid(2), setreuid(2), setuid(2), capabilities(7)

Linux 2.6.6			  2004-05-27			    SETEGID(2)

Vote for polarhome