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

1.1     ! root        1: 
        !             2: 
        !             3: group                      File Format                      group
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        !             8: Group file format
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        !            11: The  group file  /etc/group describes the  user groups  that have
        !            12: been defined on your  COHERENT system.  This allows users to con-
        !            13: trol  the access  that  members of  their group  have to  certain
        !            14: files.   /etc/group contains  the  information to  map any  ASCII
        !            15: group name  to the corresponding numerical  group identifier, and
        !            16: vice versa.  It also contains, in ASCII, the names of the members
        !            17: of each  group.  This information  is used by,  among others, the
        !            18: command newgrp.
        !            19: 
        !            20: Each  group has  an entry  in  the file  /etc/group one  line per
        !            21: entry.  Each line  consists of four colon-separated ASCII fields,
        !            22: as follows:
        !            23: 
        !            24: 
        !            25:      _g_r_o_u_p__n_a_m_e : _p_a_s_s_w_o_r_d : _g_r_o_u_p__n_u_m_b_e_r : _m_e_m_b_e_r[,_m_e_m_b_e_r...]
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        !            28: Passwords are  encrypted with crypt, so the  group file is gener-
        !            29: ally readable.
        !            30: 
        !            31: The  COHERENT  system  has  five  system  calls  that  manipulate
        !            32: /etc/group, as follows:
        !            33: 
        !            34: eennddggrreenntt
        !            35:      Close /etc/group.
        !            36: 
        !            37: ggeettggrreenntt
        !            38:      Return the next entry from /etc/group.
        !            39: 
        !            40: ggeettggrrnnaamm
        !            41:      Return the first entry with a given group name.
        !            42: 
        !            43: ggeettggrrggiidd
        !            44:      Return the first entry with a given group identifier.
        !            45: 
        !            46: sseettggrreenntt
        !            47:      Rewind /etc/group, so that searches can begin again from the
        !            48:      beginning of the file.
        !            49: 
        !            50: The calls  getgrent, getgrid, and getgrnam  each return a pointer
        !            51: to structure group, which is  defined in the header file grp.h as
        !            52: follows:
        !            53: 
        !            54: 
        !            55: struct group {
        !            56:         char    *gr_name;       /* Group name */
        !            57:         char    *gr_passwd;     /* Group password */
        !            58:         int     gr_gid;         /* Numeric group id */
        !            59:         char    **gr_mem;       /* Group members */
        !            60: };
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        !            62: 
        !            63: 
        !            64: COHERENT Lexicon                                           Page 1
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        !            67: 
        !            68: 
        !            69: group                      File Format                      group
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        !            72: 
        !            73: 
        !            74: ***** Files *****
        !            75: 
        !            76: /etc/group
        !            77: 
        !            78: ***** See Also *****
        !            79: 
        !            80: chgrp(),   crypt(),   endgrent(),   file   formats,   getgrent(),
        !            81: getgrgid(), getgrnam(), grp.h, newgrp, passwd, setgrend()
        !            82: 
        !            83: ***** Notes *****
        !            84: 
        !            85: At present  the group password  field cannot be  set directly (no
        !            86: command similar to passwd exists for groups).  One alternative is
        !            87: to set the  password in the /etc/passwd file for  a user with the
        !            88: passwd command,  and then transcribe the  password into the group
        !            89: file manually.
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        !           130: COHERENT Lexicon                                           Page 2
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