src/usr.bin/printf/printf.c, branch releng/12.4

printf: Fix \c in %b in printf builtin exiting the shell after r337458

2018-08-11T11:13:34Z

SVN r337458 erroneously partially reverted r265885. This is immediately visible when running the Kyua/ATF tests for usr.bin/printf, which actually test sh's printf builtin. PR: 229641

Fix printf(1) ignores width and precision in %b format.

2018-08-08T15:25:01Z

The precision with the conversion specifier b is specified by POSIX: see point 7 in the reference documentation. This corrects previous wrong log in r337440. Reference: http://pubs.opengroup.org/onlinepubs/9699919799/utilities/printf.html PR: 229641 Reported by: Rudolf Cejka Submitted by: Garrett D'Amore (illumos) MFC after: 1 week

Revert r337440: the log message is wrong.

2018-08-08T15:12:32Z

Fix printf(1) ignores width and precision in %b format.

2018-08-07T23:03:50Z

The precision with behavior is "unspecified" by POSIX (as of 2018), but most implementations seem to have taken it to be treated the same as for "s"; applied after the unescaping. Adopt the same treatment on our printf. PR: 229641 Submitted by: Garrett D'Amore (illumos)

General further adoption of SPDX licensing ID tags.

2017-11-20T19:49:47Z

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.

printf: Output formatted data directly, instead of via asprintf.

2017-04-29T21:48:11Z

Long ago, sh used to have its own optimized and restricted string formatting implementation, which the printf builtin had to bypass via asprintf() to a temporary buffer. Since sh has used libc's string formatting implementation for a long time, remove the workaround. Add a check to keep printf %c '' working the same way (output nothing); POSIX allows both outputting nothing and outputting a NUL byte. Also, this change avoids silently discarding format directives for whose output asprintf() cannot allocate memory.

Renumber copyright clause 4

2017-02-28T23:42:47Z

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 Pull Request: https://github.com/freebsd/freebsd/pull/96

sh: Fix compiler warnings related to duplicate or missing declarations.

2015-03-01T21:46:55Z

Minor style knit.

2014-05-29T19:43:43Z

printf(1): warn about incomplete uses n$

2014-05-26T14:57:47Z

Reviewed by: jilles Obtained from: Illumos MFC after: 2 weeks