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Annotation of lucent/sys/man/1/chmod, revision 1.1.1.1

1.1       root        1: .TH CHMOD 1 
                      2: .SH NAME
                      3: chmod \- change mode
                      4: .SH SYNOPSIS
                      5: .B chmod
                      6: .I mode file ...
                      7: .SH DESCRIPTION
                      8: The mode of
                      9: each named file
                     10: is changed
                     11: according to
                     12: .IR mode,
                     13: which may be an octal number or a symbolic change to the existing mode.
                     14: A
                     15: .I mode
                     16: is an octal
                     17: number constructed
                     18: from the OR of the
                     19: following modes.
                     20: .TF 0000
                     21: .TP
                     22: 0400
                     23: read by owner
                     24: .TP
                     25: 0200
                     26: write by owner
                     27: .TP
                     28: 0100
                     29: execute (search in directory) by owner
                     30: .TP
                     31: 0070
                     32: read, write, execute (search) by group
                     33: .TP
                     34: 0007
                     35: read, write, execute (search) by others
                     36: .PD
                     37: .PP
                     38: A symbolic
                     39: .I mode
                     40: has the form:
                     41: .IP
                     42: .RI [who]
                     43: .I op permission
                     44: .PP
                     45: The
                     46: .I who
                     47: part is a combination
                     48: of the letters 
                     49: .B u
                     50: (for user's permissions),
                     51: .B g
                     52: (group)
                     53: and
                     54: .B o
                     55: (other).
                     56: The letter
                     57: .B a
                     58: stands for
                     59: .BR ugo .
                     60: If
                     61: .I who
                     62: is omitted,
                     63: the default is
                     64: .BR a .
                     65: .PP
                     66: .I Op
                     67: can be
                     68: .B +
                     69: to add
                     70: .I permission
                     71: to the file's mode,
                     72: .B -
                     73: to take away
                     74: .IR permission ,
                     75: and
                     76: .B =
                     77: to assign
                     78: .I permission
                     79: absolutely
                     80: (all other bits will
                     81: be reset).
                     82: .PP
                     83: .I Permission
                     84: is any combination of the letters
                     85: .B r
                     86: (read),
                     87: .B w
                     88: (write),
                     89: .B x
                     90: (execute),
                     91: .B a
                     92: (append only),
                     93: and
                     94: .B l
                     95: (exclusive access).
                     96: .PP
                     97: Only the owner of a file or the group leader of its group
                     98: may change the file's mode.
                     99: .SH SOURCE
                    100: .B /sys/src/cmd/chmod.c
                    101: .SH "SEE ALSO"
                    102: .IR ls (1),
                    103: .IR stat (2),
                    104: .IR stat (5)

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