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Reported by Georg Neis as Debian bug 400778.
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a+s versus +s, and likewise for g+s.
(Numeric Modes): Bring back example of 0055 == 55. 4755 no
longer clears setgid bit on directories.
(Directory Setuid and Setgid): Numeric modes now affect setuid
and setgid on directories only if they set these bits. This
is so that leading 0 has no effect on numeric modes.
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GNU extension, and that other systems behave differently here.
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about distinguishing file mode bits from permissions bits,
and about execute versus search permission. The FreeBSD command
is chflags, not chrflags.
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restricts only unprivileged users.
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setuid and setgid bits on directories.
(Changing Special Mode Bits): Mention that a implies both u and g
for s. Cross reference to new node.
(Numeric Modes): Don't claim that 0055 is the same as 55; this isn't
true any more. Mention new node.
4755 is now like u=rwxs,go=rx,g-s, not like u=rwxs,go=rx.
(Directory Setuid and Setgid): New node.
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enumerated list and fix a typo. From Aaron Hawley.
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(Conditional Executability, Numeric Modes):
These days the sticky bit is more often uses as the restricted
deletion flag, so modernize the discussion about this.
(Mode Structure): Linux/GNU -> GNU/Linux.
(Symbolic Modes): Don't imply that "+ur" or "u" is valid.
(Setting Permissions): Don't imply that "+t" is invalid.
Use "rwx" rather than the less-common "rxw" in an example.
(Copying Permissions): Say that ugo is a replacement for
a string of the other letters. Add spaces around examples.
Use "set-user-ID" rather than "set user ID" to avoid ambiguity.
Use "+t" rather than "o+t", since POSIX doesn't specify the latter.
Mention which combinations are portable and which are GNU.
(Numeric Modes): Don't imply they aren't portable; they are
nowadays.
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than "filesystem", as POSIX prefers it with a space.
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permissions and that mounting a filesystem as read-only may
override actual file permissions. Use @command instead
of @code for program names.
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/restricted deletion flag/
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which is the term that POSIX d5 uses for this notion.
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`a' in the USERS part of a symbolic mode does not cause the special
permissions to be affected... It doesn't reflect what the code does
and isn't required by POSIX. Reported by aldomel@ix.netcom.com via
Mike Stone.
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