Conrad Meyer 9c4241c3d7 ps(1): Only detect terminal width if stdout is a tty ... If stdout isn't a tty, use unlimited width output rather than truncating to 79 characters. This is helpful for shell scripts or e.g., 'ps | grep foo'. This hardcoded width has some history: In The Beginning of History[0], the width of ps was hardcoded as 80 bytes. In 1985, Bloom@ added detection using TIOCGWINSZ on stdin.[1] In 1986, Kirk merged a change to check stdout's window size instead. In 1990, the fallback checks to stderr and stdin's TIOCGWINSZ were added by Marc@, with the commit message "new version."[2] OS X Darwin has a very similar modification to ps(1), which simply sets UNLIMITED for all non-tty outputs.[3] I've chosen to respect COLUMNS instead of behaving identically to Darwin here, but I don't feel strongly about that. We could match OS X for parity if that is desired. [0]: https://svnweb.freebsd.org/csrg/bin/ps/ps.c?annotate=1065 [1]: https://svnweb.freebsd.org/csrg/bin/ps/ps.c?r1=18105&r2=18106 [2]: https://svnweb.freebsd.org/csrg/bin/ps/ps.c?r1=40675&r2=40674&pathrev=40675 [3]: https://opensource.apple.com/source/adv_cmds/adv_cmds-168/ps/ps.c.auto.html PR: 217159 Reported by: Deepak Nagaraj <n.deepak at gmail.com>		2017-03-04 22:38:10 +00:00
..
extern.h	Renumber copyright clause 4	2017-02-28 23:42:47 +00:00
fmt.c	Renumber copyright clause 4	2017-02-28 23:42:47 +00:00
keyword.c	Renumber copyright clause 4	2017-02-28 23:42:47 +00:00
Makefile	Explicitly add unmarked bin/ binaries to the runtime package.	2016-02-09 16:58:50 +00:00
Makefile.depend	Update dependencies after r291406 added libelf to libkvm.	2015-12-01 05:18:48 +00:00
nlist.c	Renumber copyright clause 4	2017-02-28 23:42:47 +00:00
print.c	Renumber copyright clause 4	2017-02-28 23:42:47 +00:00
ps.1	Renumber copyright clause 4	2017-02-28 23:42:47 +00:00
ps.c	ps(1): Only detect terminal width if stdout is a tty	2017-03-04 22:38:10 +00:00
ps.h	Renumber copyright clause 4	2017-02-28 23:42:47 +00:00