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SGI Freeware 1998 June
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fw_fileutils.idb
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chmod.Z
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chmod
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Text File
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1998-05-21
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134 lines
/xlv1/freeware/1998.May/fileutils/3.16/fileutils-3.16.diffbuild/man
CCCCHHHHMMMMOOOODDDD((((1111)))) FFFFSSSSFFFF ((((GGGGNNNNUUUU FFFFiiiilllleeee UUUUttttiiiilllliiiittttiiiieeeessss)))) CCCCHHHHMMMMOOOODDDD((((1111))))
NNNNAAAAMMMMEEEE
chmod - change the access permissions of files
SSSSYYYYNNNNOOOOPPPPSSSSIIIISSSS
cccchhhhmmmmoooodddd [-Rcfv] [--recursive] [--changes] [--silent] [--quiet]
[--verbose] [--help] [--version] mode file...
DDDDEEEESSSSCCCCRRRRIIIIPPPPTTTTIIIIOOOONNNN
This documentation is no longer being maintained and may be
inaccurate or incomplete. The Texinfo documentation is now
the authoritative source.
This manual page documents the GNU version of cccchhhhmmmmoooodddd. cccchhhhmmmmoooodddd
changes the permissions of each given file according to
_m_o_d_e, which can be either a symbolic representation of
changes to make, or an octal number representing the bit
pattern for the new permissions.
The format of a symbolic mode is `[ugoa...][[+-
=][rwxXstugo...]...][,...]'. Multiple symbolic operations
can be given, separated by commas.
A combination of the letters `ugoa' controls which users'
access to the file will be changed: the user who owns it
(u), other users in the file's group (g), other users not in
the file's group (o), or all users (a). If none of these
are given, the effect is as if `a' were given, but bits that
are set in the umask are not affected.
The operator `+' causes the permissions selected to be added
to the existing permissions of each file; `-' causes them to
be removed; and `=' causes them to be the only permissions
that the file has.
The letters `rwxXstugo' select the new permissions for the
affected users: read (r), write (w), execute (or access for
directories) (x), execute only if the file is a directory or
already has execute permission for some user (X), set user
or group ID on execution (s), save program text on swap
device (t), the permissions that the user who owns the file
currently has for it (u), the permissions that other users
in the file's group have for it (g), and the permissions
that other users not in the file's group have for it (o).
A numeric mode is from one to four octal digits (0-7),
derived by adding up the bits with values 4, 2, and 1. Any
omitted digits are assumed to be leading zeros. The first
digit selects the set user ID (4) and set group ID (2) and
save text image (1) attributes. The second digit selects
permissions for the user who owns the file: read (4), write
(2), and execute (1); the third selects permissions for
other users in the file's group, with the same values; and
Page 1 (printed 5/18/98)
CCCCHHHHMMMMOOOODDDD((((1111)))) FFFFSSSSFFFF ((((GGGGNNNNUUUU FFFFiiiilllleeee UUUUttttiiiilllliiiittttiiiieeeessss)))) CCCCHHHHMMMMOOOODDDD((((1111))))
the fourth for other users not in the file's group, with the
same values.
cccchhhhmmmmoooodddd never changes the permissions of symbolic links; the
cccchhhhmmmmoooodddd system call cannot change their permissions. This is
not a problem since the permissions of symbolic links are
never used. However, for each symbolic link listed on the
command line, cccchhhhmmmmoooodddd changes the permissions of the pointed-
to file. In contrast, cccchhhhmmmmoooodddd ignores symbolic links
encountered during recursive directory traversals.
OOOOPPPPTTTTIIIIOOOONNNNSSSS
-_c, --_c_h_a_n_g_e_s
Verbosely describe only files whose permissions
actually change.
-_f, --_s_i_l_e_n_t, --_q_u_i_e_t
Do not print error messages about files whose
permissions cannot be changed.
-_v, --_v_e_r_b_o_s_e
Verbosely describe changed permissions.
-_R, --_r_e_c_u_r_s_i_v_e
Recursively change permissions of directories and their
contents.
--_h_e_l_p
Print a usage message on standard output and exit
successfully.
--_v_e_r_s_i_o_n
Print version information on standard output then exit
successfully.
Page 2 (printed 5/18/98)