realpath: Belatedly document POSIX conformance

We've been mostly POSIX-conforming since r236400 and fully since r240410,
which fixed a corner case where a missing non-leaf directory would be
reporte

realpath: Belatedly document POSIX conformance

We've been mostly POSIX-conforming since r236400 and fully since r240410,
which fixed a corner case where a missing non-leaf directory would be
reported as ENOTDIR instead of ENOENT.

Sponsored by: Klara, Inc.
Fixes: 7877ed7ce33e ("Avoid mapping ENOENT to ENOTDIR for non-existent path components.")
Reviewed by: ziaee, markj
Differential Revision: https://reviews.freebsd.org/D53027

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lib: Remove ancient SCCS tags.

Remove ancient SCCS tags from the tree, automated scripting, with two
minor fixup to keep things compiling. All the common forms in the tree
were removed with a perl s

lib: Remove ancient SCCS tags.

Remove ancient SCCS tags from the tree, automated scripting, with two
minor fixup to keep things compiling. All the common forms in the tree
were removed with a perl script.

Sponsored by: Netflix

show more ...

Remove $FreeBSD$: one-line nroff pattern

Remove /^\.\\"\s*\$FreeBSD\$$\n/

realpath: Belatedly document POSIX conformance

We've been mostly POSIX-conforming since r236400 and fully since r240410,
which fixed a corner case where a missing non-leaf directory would be
reporte

realpath: Belatedly document POSIX conformance

We've been mostly POSIX-conforming since r236400 and fully since r240410,
which fixed a corner case where a missing non-leaf directory would be
reported as ENOTDIR instead of ENOENT.

Sponsored by: Klara, Inc.
Fixes: 7877ed7ce33e ("Avoid mapping ENOENT to ENOTDIR for non-existent path components.")
Reviewed by: ziaee, markj
Differential Revision: https://reviews.freebsd.org/D53027

show more ...

lib: Remove ancient SCCS tags.

Remove ancient SCCS tags from the tree, automated scripting, with two
minor fixup to keep things compiling. All the common forms in the tree
were removed with a perl s

lib: Remove ancient SCCS tags.

Remove ancient SCCS tags from the tree, automated scripting, with two
minor fixup to keep things compiling. All the common forms in the tree
were removed with a perl script.

Sponsored by: Netflix

show more ...

Remove $FreeBSD$: one-line nroff pattern

Remove /^\.\\"\s*\$FreeBSD\$$\n/

Merge from head

IFC @ r254014

IFC @253398

Merge fresh head.

Renumber clauses to reduce diffs to other versions

NetBSD, OpenBSD, and Android's Bionic number the clauses 1 through 3,
so follow suit to make comparison easier.

sync from head

MFC @248461

Add restrict keyword to realpath manpage.

IFC @ r238370

Merge head r233826 through r236168.

MFC

MFC r207009:
C language does not has references, it provides pointers.

MFC r206893:
Slightly modernize realpath(3).

SUSv4 requires that implementation returns EINVAL if supplied path is NULL,
and ENOENT if path is empty string [1].
Bring prototype in conformance with S

MFC r206893:
Slightly modernize realpath(3).

SUSv4 requires that implementation returns EINVAL if supplied path is NULL,
and ENOENT if path is empty string [1].
Bring prototype in conformance with SUSv4, adding restrict keywords.
Allow the resolved path buffer pointer be NULL, in which case realpath(3)
allocates storage with malloc().

MFC r206898:
Free() is not allowed to modify errno, remove safety brackets around it.
Add small optimization, do not copy a string to the buffer that is
to be freed immediately after.

MFC r206997:
Move realpath(3) prototype to a POSIX section.

MFC r206998:
Add standards section, improve wording, taking into account the handling
of NULL and changed type in declaration.

show more ...

Merge from head

IFC @ r254014

IFC @253398

Merge fresh head.

Renumber clauses to reduce diffs to other versions

NetBSD, OpenBSD, and Android's Bionic number the clauses 1 through 3,
so follow suit to make comparison easier.

sync from head