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setresgid32 (2)
  • >> setresgid32 (2) ( Linux man: Системные вызовы )
  •  

    NAME

    setresuid, setresgid - set real, effective and saved user or group ID
     
    

    SYNOPSIS

    #define _GNU_SOURCE
    #include <unistd.h>

    int setresuid(uid_t ruid, uid_t euid, uid_t suid);
    int setresgid(gid_t rgid, gid_t egid, gid_t sgid);  

    DESCRIPTION

    setresuid() sets the real user ID, the effective user ID, and the saved set-user-ID of the calling process.

    Unprivileged user processes may change the real UID, effective UID, and saved set-user-ID, each to one of: the current real UID, the current effective UID or the current saved set-user-ID.

    Privileged processes (on Linux, those having the CAP_SETUID capability) may set the real UID, effective UID, and saved set-user-ID to arbitrary values.

    If one of the arguments equals -1, the corresponding value is not changed.

    Regardless of what changes are made to the real UID, effective UID, and saved set-user-ID, the file system UID is always set to the same value as the (possibly new) effective UID.

    Completely analogously, setresgid() sets the real GID, effective GID, and saved set-group-ID of the calling process (and always modifies the file system GID to be the same as the effective GID), with the same restrictions for non-privileged processes.  

    RETURN VALUE

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

    ERRORS

    EAGAIN
    uid does not match the current UID and this call would bring that user ID over its RLIMIT_NPROC resource limit.
    EPERM
    The calling process is not privileged (did not have the CAP_SETUID capability) and tried to change the IDs to values that are not permitted.
     

    VERSIONS

    These calls are available under Linux since Linux 2.1.44.  

    CONFORMING TO

    These calls are non-standard; they also appear on HP-UX and some of the BSDs.  

    NOTES

    Under HP-UX and FreeBSD the prototype is found in <unistd.h>. Under Linux the prototype is provided by glibc since version 2.3.2.  

    SEE ALSO

    getresuid(2), getuid(2), setfsgid(2), setfsuid(2), setreuid(2), setuid(2), capabilities(7), credentials(7), feature_test_macros(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
    VERSIONS
    CONFORMING TO
    NOTES
    SEE ALSO
    COLOPHON


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