src-test2/usr.bin/xargs/strnsubst.c, branch masterFreeBSD source treehttps://cgit-dev.freebsd.org/src-test2/atom?h=master2017-12-27T03:23:01Zuserland: Fix several typos and minor errors2017-12-27T03:23:01ZEitan Adlereadler@FreeBSD.org2017-12-27T03:23:01Zurn:sha1:dae3a64fb967bbff627efc2e8cdd127c6b93d902
- duplicate words
- typos
- references to old versions of FreeBSD
Reviewed by: imp, benno
Follow calloc convention in other code, this is functionally identical2013-01-05T00:23:58ZXin LIdelphij@FreeBSD.org2013-01-05T00:23:58Zurn:sha1:df4110b6cf245e6b75f8172321cce04f90774186
to its previous form.
Handle maxsize==0 in such a way that we don't modify the string.2005-12-30T23:22:50ZJuli Mallettjmallett@FreeBSD.org2005-12-30T23:22:50Zurn:sha1:38e62c6999de3411594145951fed88682a2334a9Modify behaviour of `xargs -I` in order to:2004-10-18T15:40:47ZColin Percivalcperciva@FreeBSD.org2004-10-18T15:40:47Zurn:sha1:5578bd8c991bd987dbf63ea87d5588e50fb410c3
1. Conform to IEEE Std 1003.1-2004, which state that "Constructed
arguments cannot grow larger than 255 bytes", and
2. Avoid a buffer overflow.
Unfortunately the standard doesn't indicate how xargs is supposed to
handle arguments which (with the appropriate substitutions) would grow
larger than 255 bytes; this solution handles those by making as many
substitutions as possible without overflowing the buffer.
OpenBSD's xargs resolves this in a different direction, by making
all the substitutions and then silently truncating the resulting string.
Since this change may break existing scripts which rely upon the buffer
overflow (255 bytes isn't really all that long...) it will not be MFCed.
Check for results of repeated calls to strnsubst(), as well as for the2002-06-22T12:58:42ZJuli Mallettjmallett@FreeBSD.org2002-06-22T12:58:42Zurn:sha1:5058dcb497254b4188415d8b02e3f0eedd12b560
behaviour with NULL match string, as that has changed over time.
Allow the input line to be NULL, and teach strnsubst() that NULL means to use2002-05-30T19:24:08ZJuli Mallettjmallett@FreeBSD.org2002-05-30T19:24:08Zurn:sha1:986d829b8fa29b653a40f382466c0b16ffdc63cd
a nil-string.
Fix a bug whereby we were getting ~0 and comparing it to maxsize, i.e. if2002-05-03T19:45:41ZJuli Mallettjmallett@FreeBSD.org2002-05-03T19:45:41Zurn:sha1:38dff9a4391c3c3537814acecc88b433fcd40156
s1 was 0 length, and replstr was 0 length, etc., we would end up subtracting
one from zero and seeing if it was greater than the size_t (unsigned) var
maxsize... This would cause us to return a string consisting of essentially
only match, which is not the right behaviour if we have 0 length inpline.
*str is spelled 's1' inside the body of the code.2002-05-02T02:15:06ZJuli Mallettjmallett@FreeBSD.org2002-05-02T02:15:06Zurn:sha1:299ea75ab74646674c882badc6cb19f106752f4a
Make 'this' not a local variable, since it isn't necessary or complex enough
to warrant such.
Rework some of the -I support so I can't find a way to make xargs(1) core or2002-05-02T02:06:03ZJuli Mallettjmallett@FreeBSD.org2002-05-02T02:06:03Zurn:sha1:0fa5e8dc420b528e314e3ea440a9bf3546955a84
corrupt memory. Simplifies the code in one or two places, also removes some
code that looks like it was bogus or incomplete.
Update strnsubst to have one or two extra conditions which maybe would make
it more efficient, or at least more versatile. This is likely a no-op.
After 3 months...2002-04-19T23:28:54ZJuli Mallettjmallett@FreeBSD.org2002-04-19T23:28:54Zurn:sha1:fc17b349c80e282eca14a7e065caa67f07525a80
Merge xargs(1) with that of xMach.
Bring in xargs(1) changes to add -L and -I as per the Single Unix Specification
version 3. Proper exit status numbers are implemented, and the manual page has
been updated to reflect reality.
The code has been ANSIfied, and a new file has been added to xargs(1) to do the
substring substitution as SUSv3 requires.
Traditional behaviour should not be affected, use of -J should be deprecated
in favor of the more portable -I (though -J has been left, for now).
Submitted by: me, tjr (the exit status stuff)
Obtained from: xMach