Commit Graph

37 Commits

Author SHA1 Message Date
Kyle Evans
f1f7f31366 cmp: initialize limit to avoid stack garbage limits
Pointy hat:	kevans
Fixes:	4e380e8474 ("cmp: add -n, --bytes to limit number of bytes [...]")
Sponsored by:	Klara, Inc.
2021-10-21 11:30:55 -05:00
Kyle Evans
f66b9b40f4 cmp: add -b, --print-bytes
This is compatible with GNU cmp.

Reviewed by:	bapt, markj (earlier version)
Sponsored by:	Klara, Inc.
Differential Revision:	https://reviews.freebsd.org/D32074
2021-09-29 13:04:57 -05:00
Kyle Evans
8d546b6832 cmp: add -i, --ignore-initial, an alternative to skip1/skip2 args
This is compatible with GNU cmp.

Reviewed by:	markj
Sponsored by:	Klara, Inc.
Differential Revision:	https://reviews.freebsd.org/D32073
2021-09-29 13:03:34 -05:00
Kyle Evans
4e380e8474 cmp: add -n, --bytes to limit number of bytes to compare
This is compatible with GNU cmp.

Reviewed by:	markj
Sponsored by:	Klara, Inc.
Differential Revision:	https://reviews.freebsd.org/D32072
2021-09-29 13:03:34 -05:00
Kyle Evans
f6787614fd cmp: accept SI suffixes for skip1 and skip2
This is compatible with GNU cmp.

Reviewed by:	bapt (earlier version), markj, imp
Sponsored by:	Klara, Inc.
Differential Revision:	https://reviews.freebsd.org/D32071
2021-09-29 13:03:34 -05:00
Ed Maste
80445b7a3f cmp: fix -s (silent) when used with skip offsets
-s causes cmp to print nothing for differing files, for use when only
the exit status is of interest.

-z compares the file size first, for regular files, and fails the
comparison early if they do not match.

Prior to this change -s implied -z as an optimization, but this is not
valid when file offsets are specified.  Now, enable the -z optimization
for -s only if both skip arguments are not provided / 0.

Note that using -z with differing skip values will currently always
fail.  We may want to compare size1 - skip1 with size2 - skip2 instaead,
and in any case the man page should be clarified.

PR:		252542
Fixes:		3e6902efc8
Reported by:	William Ahern
Reviewed by:	markj
MFC after:	1 week
Sponsored by:	The FreeBSD Foundation
Differential Revision:	https://reviews.freebsd.org/D28071
2021-01-10 19:02:56 -05:00
Ed Maste
1f7661742d cmp: use C99 bool for flags
MFC after:	1 week
Reviewed by:	markj
Sponsored by:	The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D28072
2021-01-10 19:02:55 -05:00
Mark Johnston
2528b7e2cb Fix handling of rights on stdio streams, take two.
Split the rights-limiting code into two cases: if one of the input
files isn't a regular file, use caph_limit_stream(3) instead of
open-coding the same logic; if both input files are regular files,
and the initial attempts to map them succeed, we limit the rights on
those files to CAP_MMAP_R.

Add a regression test for PR 234885.

PR:		234885
Reviewed by:	delphij
MFC after:	2 weeks
Sponsored by:	The FreeBSD Foundation
Differential Revision:	https://reviews.freebsd.org/D19216
2019-02-25 19:47:27 +00:00
Mark Johnston
33a28349a7 Revert r343117.
It breaks the special mode specified by passing "-" as one of the
input files.  Revert for now while we discuss a fix.

PR:		234885
Reported by:	delphij
MFC after:	now
2019-01-21 03:47:20 +00:00
Mark Johnston
e6de40fa79 Fix handling of rights on stdio streams.
- Limit rights on stdio before opening input files.  Otherwise, open()
  may return one of the standard descriptors and we end up limiting
  rights such that we cannot read from one of the input files.
- Use caph_limit_stdio(), which suppresses EBADF, to ensure that
  we don't emit an error if one of the stdio streams is closed.
- Don't bother further limiting rights on stdin when stdin isn't going
  to be used.  Doing so correctly requires checking for a number of
  edge cases, and it doesn't provide any significant benefit.

PR:		234885
Reviewed by:	oshogbo
MFC after:	3 days
Sponsored by:	The FreeBSD Foundation
Differential Revision:	https://reviews.freebsd.org/D18860
2019-01-17 17:36:18 +00:00
Mariusz Zaborski
377421df96 capsicum: use a new capsicum helpers in tools
Use caph_{rights,ioctls,fcntls}_limit to simplify the code.
2018-11-04 19:24:49 +00:00
Mariusz Zaborski
7672a0148f Convert cap_enter() < 0 && errno != ENOSYS to caph_enter() < 0.
No functional change intended.
2018-06-19 23:43:14 +00:00
Kyle Evans
8facfdcf21 cmp(1): Provide some long options
These match GNU cmp(1) for compatibility where applicable.

Future work might implement the -i option from GNU cmp(1) to express skip
either in terms of both files or of the form "SKIP1:SKIP2" rather than
specifying them as additional arguments to cmp(1).

MFC after:	1 month
2018-05-02 01:32:34 +00:00
Pedro F. Giffuni
8a16b7a18f 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.
2017-11-20 19:49:47 +00:00
Warner Losh
fbbd9655e5 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
2017-02-28 23:42:47 +00:00
Mariusz Zaborski
abdfa0b19c Restrict stdin if it's not in use.
Reviewed by:	emaste, cem
Differential Revision:	https://reviews.freebsd.org/D8184
2016-10-07 19:02:13 +00:00
Mariusz Zaborski
a4e3fc54a0 Remove the duplicated code using Capsicum helpers.
Reviewed by:	cem, ed, bapt, emaste
Differential Revision	https://reviews.freebsd.org/D8140
2016-10-07 17:56:57 +00:00
Conrad Meyer
d36899d10f Move sys/capsicum.h includes after types.h or param.h
This is not actually documented or even implied in style(9).  Make the change
to match convention.  Someone should document this convention in style(9).

Reported by:	jhb
Sponsored by:	EMC Dell Isilon
2016-09-19 20:43:03 +00:00
Conrad Meyer
e75a7302d3 cmp(1): Capsicumify
Reviewed by:	allanjude, bapt, oshogbo
Sponsored by:	Dell EMC Isilon
Differential Revision:	https://reviews.freebsd.org/D7912
2016-09-19 16:13:00 +00:00
Joel Dahl
da52b4caaf Remove the advertising clause from UCB copyrighted files in usr.bin. This
is in accordance with the information provided at
ftp://ftp.cs.berkeley.edu/pub/4bsd/README.Impt.License.Change

Also add $FreeBSD$ to a few files to keep svn happy.

Discussed with:	imp, rwatson
2010-12-11 08:32:16 +00:00
Brian Somers
e1bfde1b04 Add a -h option to tell cmp not to follow symbolic links.
MFC after:	3 weeks
Sponsored by:	Sophos/ActiveState
2005-08-23 13:13:13 +00:00
David Malone
f2e8e0dad7 ANSIify function definitions to avoid a warning. 2002-07-28 15:13:17 +00:00
Tim J. Robbins
6e473901a3 No need to check for "-" explicitly in getopt() loop. 2002-06-07 02:35:21 +00:00
Tim J. Robbins
c87180589e Exit >1 when an error occurs, regardless of whether -s is specified (SUSv3) 2002-06-07 02:30:56 +00:00
Warner Losh
f1bb2cd2aa remove __P 2002-03-22 01:22:50 +00:00
David Malone
9f5b04e925 Style improvements recommended by Bruce as a follow up to some
of the recent WARNS commits. The idea is:

1) FreeBSD id tags should follow vendor tags.
2) Vendor tags should not be compiled (though copyrights probably should).
3) There should be no blank line between including cdefs and __FBSDIF.
2001-12-10 21:13:08 +00:00
Mark Murray
6af414cb2e Turn on WARNS=2.
Use __FBSDID().
2001-12-02 23:29:26 +00:00
David Malone
c5250ed112 Make filenames const to avoid a few warnings.
Add FreeBSD tags.

Reviewed by:	cmp
2001-11-05 20:33:40 +00:00
Sheldon Hearn
1727cb4cae Fix a bug introduced in rev 1.8, where special files ended up
being treated like regular files because of missing braces.

PR:		20143
2000-07-25 13:01:34 +00:00
Brian Somers
3e6902efc8 Add the -z flag to check file sizes first
Correct the cmp.1 usage message
Correct the -l/-s incompatibility message

Submitted by: Mark Knight <markk@knigma.org>
2000-07-14 16:54:59 +00:00
Poul-Henning Kamp
e03983a32c Let cmp(1) grow in -x option to print differences in contemporarry hex
format rather than the mixed decimal/octal format of -l.
2000-05-15 08:30:43 +00:00
Archie Cobbs
fa146c5335 Tweaks to allow compiling -Wall (mostly adding "const" to char rcsid[]). 1998-12-06 22:58:23 +00:00
Jonathan Lemon
1e17b9450c Permit hex/octal parameters to cmp, to match what the manual page says.
PR:		3850, 3855
1997-08-19 14:34:04 +00:00
Philippe Charnier
f771f05273 Correct usage string. Program name converted to bold in man page. 1997-06-26 11:22:12 +00:00
Warner Losh
1c8af87873 compare return value from getopt against -1 rather than EOF, per the final
posix standard on the topic.
1997-03-29 04:34:07 +00:00
Jordan K. Hubbard
e526625999 I don't like what they did to cmp(1) in 4.4 Lite; now it whines all
the time, even with -s.  Make cmp SHUT UP about non-existant files
when run with -s.
Submitted by:	jkh
1994-08-20 11:14:07 +00:00
Rodney W. Grimes
9b50d90275 BSD 4.4 Lite Usr.bin Sources 1994-05-27 12:33:43 +00:00