setmode(3)                                                   setmode(3)

  setmode()

  NAME

    getmode(), setmode() - modify mode bits

  SYNOPSIS

    #include 
    #include 

    mode_t getmode (const void *set, mode_t mode)
    void *setmode (const char *mode_str)

  DESCRIPTION

    The getmode(3) function returns a copy of the file permission bits mode as
    altered by the values pointed to by set. While only the mode bits are
    altered, other parts of the file mode may be examined.

    The setmode(3) function takes an absolute (octal) or symbolic value, as
    described in chmod(2), as an argument and returns a pointer to mode values
    to be supplied to getmode(3). Because some of the symbolic values are
    relative to the file creation mask, setmode(3) may call umask(2). If this
    occurs, the file creation mask will be restored before setmode(3) returns.
    If the calling program changes the value of its file creation mask after
    calling setmode(3), setmode(3) must be called again if getmode(3) is to
    modify future file modes correctly.

    If the mode passed to setmode(3) is invalid, setmode(3) returns NULL.

  ERRORS

    The setmode(3) function may fail and set errno for any of the errors
    specified for the library routine malloc(3).

  SEE ALSO

    chmod(2)

    stat(2)

    umask(2)

    malloc(3)

  USAGE NOTES

    All of these functions are thread safe.

    None of these functions are async-signal safe.