bin: Automated cleanup of cdefs and other formatting

Apply the following automated changes to try to eliminate
no-longer-needed sys/cdefs.h includes as well as now-empty
blank lines in a row.

Remov

bin: Automated cleanup of cdefs and other formatting

Apply the following automated changes to try to eliminate
no-longer-needed sys/cdefs.h includes as well as now-empty
blank lines in a row.

Remove /^#if.*\n#endif.*\n#include\s+<sys/cdefs.h>.*\n/
Remove /\n+#include\s+<sys/cdefs.h>.*\n+#if.*\n#endif.*\n+/
Remove /\n+#if.*\n#endif.*\n+/
Remove /^#if.*\n#endif.*\n/
Remove /\n+#include\s+<sys/cdefs.h>\n#include\s+<sys/types.h>/
Remove /\n+#include\s+<sys/cdefs.h>\n#include\s+<sys/param.h>/
Remove /\n+#include\s+<sys/cdefs.h>\n#include\s+<sys/capsicum.h>/

Sponsored by: Netflix

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bin: 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

bin: 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

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sh: introduce a function to iterate over all hashed commands

While aliases and built-ins are opportunistically stored in cmdtable, each
function will be added to it immediately on definition.

Facto

sh: introduce a function to iterate over all hashed commands

While aliases and built-ins are opportunistically stored in cmdtable, each
function will be added to it immediately on definition.

Factor out the hashing function, write the iterator function and make it use
the hashing function.

Add the cmdname pointer to struct cmdentry so that the command name can be
exposed that way.

Differential Revision: https://reviews.freebsd.org/D40619

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Remove $FreeBSD$: one-line .c pattern

Remove /^[\s*]*__FBSDID\("\$FreeBSD\$"\);?\s*\n/

sh: Add -o verify to use O_VERIFY when sourcing scripts

Add -o verify to sh to make it use O_VERIFY when
sourcing scripts and reading profiles.

Useful in conjunction with mac_veriexec to help prote

sh: Add -o verify to use O_VERIFY when sourcing scripts

Add -o verify to sh to make it use O_VERIFY when
sourcing scripts and reading profiles.

Useful in conjunction with mac_veriexec to help protect at
least some parts of the boot sequence, e.g., /etc/rc*.

Differential revision: https://reviews.freebsd.org/D30464
Reviewed by: jilles, sjg
Obtained from: Stormshield

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sh: Write absolute path in command -vV and type

POSIX is pretty clear that command -v, command -V and type shall write
absolute pathnames. Therefore, we need to prepend the current directory's
name

sh: Write absolute path in command -vV and type

POSIX is pretty clear that command -v, command -V and type shall write
absolute pathnames. Therefore, we need to prepend the current directory's
name to relative pathnames.

This can happen either when PATH contains a relative pathname or when the
operand contains a slash but is not an absolute pathname.

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sh: Allow more scripts without #!

Austin Group bugs #1226 and #1250 changed the requirements for shell scripts
without #! (POSIX does not specify #!; this is about the shell execution
when execve(2)

sh: Allow more scripts without #!

Austin Group bugs #1226 and #1250 changed the requirements for shell scripts
without #! (POSIX does not specify #!; this is about the shell execution
when execve(2) returns an [ENOEXEC] error).

POSIX says we shall allow execution if the initial part intended to be
parsed by the shell consists of characters and does not contain the NUL
character. This allows concatenating a shell script (ending with exec or
exit) and a binary payload.

In order to reject common binary files such as PNG images, check that there
is a lowercase letter or expansion before the last newline before the NUL
character, in addition to the check for the newline character suggested by
POSIX.

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Merge ^/head r340235 through r340367.

sh: Unify EXERROR and EXEXEC

The difference between EXERROR and EXEXEC was that EXEXEC passed along
exitstatus and EXERROR set exitstatus to 2 in the handling code.

By changing the places that rais

sh: Unify EXERROR and EXEXEC

The difference between EXERROR and EXEXEC was that EXEXEC passed along
exitstatus and EXERROR set exitstatus to 2 in the handling code.

By changing the places that raised EXERROR to set exitstatus to 2, the
handling of EXERROR and EXEXEC becomes the same.

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Merge ^/head r339813 through r340125.

sh: Use exitstatus instead of exerrno to pass EXEXEC status

No functional change is intended.

sh: Don't treat % specially in CDPATH

Merge ^/head r317808 through r317970.

sh: Update TOUR and comments for some code changes, some of them old.

Also, improve some terminology in TOUR and comments.

Merge ^/head r314420 through r314481.

Renumber copyright clause 4

Renumber cluase 4 to 3, per what everybody else did when BSD granted
them permission to remove clause 3. My insistance on keeping the same
numbering for legal reasons is

Renumber copyright clause 4

Renumber cluase 4 to 3, per what everybody else did when BSD granted
them permission to remove clause 3. My insistance on keeping the same
numbering for legal reasons is too pedantic, so give up on that point.

Submitted by: Jan Schaumann <jschauma@stevens.edu>
Pull Request: https://github.com/freebsd/freebsd/pull/96

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MFH

Sponsored by: The FreeBSD Foundation

sh: Fix copying uninitialized field 'special'.

This just copied uninitialized data and did not depend on it later, so it
should not be dangerous.

Found by: clang static analyzer

MFH @r294567

Merge ^/head r293036 through r293174.

MFH r289384-r293170

Sponsored by: The FreeBSD Foundation

sh: Reduce size of builtins table.

Merge from head

Catch up with head, primarily for the 1.14.4.0 firmware.

Merge ^/head r284737 through r285152.