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Annotation of coherent/a/usr/man/COHERENT/chmod, revision 1.1

1.1     ! root        1: 
        !             2: 
        !             3: chmod()                COHERENT System Call               chmod()
        !             4: 
        !             5: 
        !             6: 
        !             7: 
        !             8: Change file-protection modes
        !             9: 
        !            10: #include <sys/stat.h>
        !            11: cchhmmoodd(_f_i_l_e, _m_o_d_e)
        !            12: cchhaarr *_f_i_l_e; iinntt _m_o_d_e;
        !            13: 
        !            14: chmod sets the mode bits for file.  The mode bits include protec-
        !            15: tion bits, the set-user-id bit, and the sticky bit.
        !            16: 
        !            17: mode is  constructed from the logical OR  of the following, which
        !            18: are defined symbolically in the header file stat.h:
        !            19: 
        !            20: 
        !            21:           04000  Set user identifier
        !            22:           02000  Set group identifier
        !            23:           01000  Save file on swap device (``sticky bit'')
        !            24:           00400  Read permission for owner
        !            25:           00200  Write permission for owner
        !            26:           00100  Execute permission for owner
        !            27:           00040  Read permission for members of owner's group
        !            28:           00020  Write permission for members of owner's group
        !            29:           00010  Execute permission for members of owner's group
        !            30:           00004  Read permission for other users
        !            31:           00002  Write permission for other users
        !            32:           00001  Execute permission for other users
        !            33: 
        !            34: 
        !            35: For directories,  some protection bits have  a different meaning:
        !            36: write permission means  files may be created and removed, whereas
        !            37: execute permission means that the directory may be searched.
        !            38: 
        !            39: The save-text  bit (or  ``sticky bit'') is  a flag to  the system
        !            40: when it executes a shared for of a load module.  After the system
        !            41: runs the program, it leaves shared segments on the swap device to
        !            42: speed subsequent  reinvocation of the program.   Setting this bit
        !            43: is  restricted to  the superuser  (to  control depletion  of swap
        !            44: space which might result from overuse).
        !            45: 
        !            46: Only the owner of a file or the superuser may change its mode.
        !            47: 
        !            48: ***** See Also *****
        !            49: 
        !            50: COHERENT system calls, creat()
        !            51: 
        !            52: ***** Diagnostics *****
        !            53: 
        !            54: chmod returns  -1 for errors,  such as file  being nonexistent or
        !            55: the invoker being neither the owner nor the superuser.
        !            56: 
        !            57: 
        !            58: 
        !            59: 
        !            60: 
        !            61: 
        !            62: 
        !            63: 
        !            64: COHERENT Lexicon                                           Page 1
        !            65: 
        !            66: 

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