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setegid (2)
  • setegid (2) ( Solaris man: Системные вызовы )
  • setegid (2) ( FreeBSD man: Системные вызовы )
  • setegid (2) ( Русские man: Системные вызовы )
  • >> setegid (2) ( Linux man: Системные вызовы )
  • setegid (3) ( POSIX man: Библиотечные вызовы )
  •  

    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);

    Feature Test Macro Requirements for glibc (see feature_test_macros(7)):

    seteuid(), setegid(): _BSD_SOURCE || _POSIX_C_SOURCE >= 200112L || _XOPEN_SOURCE >= 600  

    DESCRIPTION

    seteuid() sets the effective user ID of the calling process. Unprivileged 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 calling process is not privileged (Linux: does not have the CAP_SETUID capability in the case of seteuid(), or the CAP_SETGID capability in the case of setegid()) and euid (respectively, egid) is not the real user (group) ID, the effective user (group) ID, or the saved set-user-ID (saved set-group-ID).
     

    CONFORMING TO

    4.3BSD, POSIX.1-2001.  

    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 glibc 2.0 seteuid(euid) is equivalent to setreuid(-1, euid) and hence may change the saved set-user-ID. Under glibc 2.1 and later it is equivalent to setresuid(-1, euid, -1) and hence does not change the saved set-user-ID. Similar remarks hold for setegid().  

    SEE ALSO

    geteuid(2), setresuid(2), setreuid(2), setuid(2), capabilities(7), credentials(7)  

    COLOPHON

    This page is part of release 3.14 of the Linux man-pages project. A description of the project, and information about reporting bugs, can be found at http://www.kernel.org/doc/man-pages/.


     

    Index

    NAME
    SYNOPSIS
    DESCRIPTION
    RETURN VALUE
    ERRORS
    CONFORMING TO
    NOTES
    SEE ALSO
    COLOPHON


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