m4: Fix eval output width

According to POSIX, the optional third argument is the minimum number
of digits to print regardless of sign. We interpreted it as the minimum
width of the output including

m4: Fix eval output width

According to POSIX, the optional third argument is the minimum number
of digits to print regardless of sign. We interpreted it as the minimum
width of the output including the sign. Additionally, the variable used
to hold this value was confusingly named “maxdigits”.

PR: 293214
MFC after: 1 week
Sponsored by: Klara, Inc.
Reviewed by: imp
Differential Revision: https://reviews.freebsd.org/D55311

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m4: Change defn processing order

Currently, defn pushes its arguments on the stack in order, which means
they are then processed in reverse order. POSIX does not specify what
order they are process

m4: Change defn processing order

Currently, defn pushes its arguments on the stack in order, which means
they are then processed in reverse order. POSIX does not specify what
order they are processed in, which arguably suggests that they should be
processed in the order they are listed. Push them in reverse order so
they will be processed in their original order. This matches GNU m4.

PR: 292937
MFC after: 1 week
Sponsored by: Klara, Inc.
Reviewed by: obiwac, imp
Differential Revision: https://reviews.freebsd.org/D55116

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m4: Allow empty base argument in eval()

POSIX specifies "The second argument, if specified, shall set the radix
for the result; if the argument is blank or unspecified, the default
is 10." Previous

m4: Allow empty base argument in eval()

POSIX specifies "The second argument, if specified, shall set the radix
for the result; if the argument is blank or unspecified, the default
is 10." Previously we reported an invalid

PR: 287015
Reviewed by: emaste

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Remove $FreeBSD$: one-line .c pattern

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

Merge ^/head r351732 through r352104.

m4: import from OpenBSD

By deraadt@

mkstemp() returns -1 on failure

Obtained from: OpenBSD

m4: import from OpenBSD

patch by espie@

replace sloppy parsing of numeric values with strtonum (incr, decr, divert)

still use integers, so use the natural bounds for these.

POSIX says m4 should e

m4: import from OpenBSD

patch by espie@

replace sloppy parsing of numeric values with strtonum (incr, decr, divert)

still use integers, so use the natural bounds for these.

POSIX says m4 should error when these use non numeric values, and now they
do.

okay millert@

Obtained from: OpenBSD

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m4: import patch from OpenBSD

by espie@
ifelse is special, fix argv parsing to avoid segfault

problem noticed by Matthew Green (netbsd), slightly different fix
so that argc counting makes more sens

m4: import patch from OpenBSD

by espie@
ifelse is special, fix argv parsing to avoid segfault

problem noticed by Matthew Green (netbsd), slightly different fix
so that argc counting makes more sense.

we might want to warn on wrong number of parameters later, but this is
somewhat inconsistent depending on the builtin right now.

okay millert@

Obtained from: OpenBSD

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Import from OpenBSD: -E flag

Add -E flag (make warnings fatal), following the behavior of GNU m4 1.4.9+

Help and direction millert@ espie@ anton@ deraadt@

ok espie@

Obtained from: OpenBSD

m4: Allow empty base argument in eval()

POSIX specifies "The second argument, if specified, shall set the radix
for the result; if the argument is blank or unspecified, the default
is 10." Previous

m4: Allow empty base argument in eval()

POSIX specifies "The second argument, if specified, shall set the radix
for the result; if the argument is blank or unspecified, the default
is 10." Previously we reported an invalid

PR: 287015
Reviewed by: emaste

show more ...

Remove $FreeBSD$: one-line .c pattern

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

Merge ^/head r351732 through r352104.

m4: import from OpenBSD

By deraadt@

mkstemp() returns -1 on failure

Obtained from: OpenBSD

m4: import from OpenBSD

patch by espie@

replace sloppy parsing of numeric values with strtonum (incr, decr, divert)

still use integers, so use the natural bounds for these.

POSIX says m4 should e

m4: import from OpenBSD

patch by espie@

replace sloppy parsing of numeric values with strtonum (incr, decr, divert)

still use integers, so use the natural bounds for these.

POSIX says m4 should error when these use non numeric values, and now they
do.

okay millert@

Obtained from: OpenBSD

show more ...

m4: import patch from OpenBSD

by espie@
ifelse is special, fix argv parsing to avoid segfault

problem noticed by Matthew Green (netbsd), slightly different fix
so that argc counting makes more sens

m4: import patch from OpenBSD

by espie@
ifelse is special, fix argv parsing to avoid segfault

problem noticed by Matthew Green (netbsd), slightly different fix
so that argc counting makes more sense.

we might want to warn on wrong number of parameters later, but this is
somewhat inconsistent depending on the builtin right now.

okay millert@

Obtained from: OpenBSD

show more ...

Import from OpenBSD: -E flag

Add -E flag (make warnings fatal), following the behavior of GNU m4 1.4.9+

Help and direction millert@ espie@ anton@ deraadt@

ok espie@

Obtained from: OpenBSD

Merge ^/head r325999 through r326131.

General further adoption of SPDX licensing ID tags.

Mainly focus on files that use BSD 3-Clause license.

The Software Package Data Exchange (SPDX) group provides a specification
to make it easier f

General further adoption of SPDX licensing ID tags.

Mainly focus on files that use BSD 3-Clause license.

The Software Package Data Exchange (SPDX) group provides a specification
to make it easier for automated tools to detect and summarize well known
opensource licenses. We are gradually adopting the specification, noting
that the tags are considered only advisory and do not, in any way,
superceed or replace the license texts.

Special thanks to Wind River for providing access to "The Duke of
Highlander" tool: an older (2014) run over FreeBSD tree was useful as a
starting point.

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usr.bin: minor spelling fixes on comments.

No functional change.

MFH r289384-r293170

Sponsored by: The FreeBSD Foundation

Catch up with head.

Synchronize m4(1) with OpenBSD

IFC @r269962

Submitted by: Anish Gupta (akgupt3@gmail.com)

Merge head from 7/28

Sync to HEAD@r269943.