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.
it. It handles everything (right now) that needs done before run(), except
the -J case, because while that would be easy, I don't quite understand -J.
Reviewed by: src/tools/regression/usr.bin/xargs
it easier to understand. Making it easy to understand isn't all that easy,
so litter the code with comments so some other poor soul can come along some
day and work on this if they see fit to do so. Avoid calling strlen(3) to
check for a nil-string, when we can just check for *str=='\0'.
Approved by: src/tools/regression/usr.bin/xargs/
same on Alpha and lint(1) pointed that out.
lint(1) on the same architecture pointed out how silly a cast to (u_int) to
malloc(3)'s argument was. Change that to size_t.
use of replstr and lack of Iflag), and add -R, which when given with
-I controls the number of arguments on which replacement will be done.
Some people happen to think it's idiotic to limit to 5 arguments, so
let the user override it if they like.
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.
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
fails, errno is saved to a volatile variable that the parent later inspects.
PR: bin/34898
Submitted by: Tim J. Robbins <tim@robbins.dropbear.id.au>
MFC after: 1 week
the data read from standard input at a specific point in the command
line arguments rather than at the end.
Submitted by: dd, gad
Reviewed by: gad, brian
o Mention that the current environment is part of the -s calculation.
o Add a BUGS section that warns against executing a program that increases
the size of the argument list or the size of the environment.
I have wondered for a while what the difference is between
get a big list | xargs sudo command
which fails and
get a big list | sudo xargs command
which succeeds. The answer is that in the first case, sudo expands
the environment and pushes the amount of data passed into execve over
the E2BIG threshold.
track.
The $Id$ line is normally at the bottom of the main comment block in the
man page, separated from the rest of the manpage by an empty comment,
like so;
.\" $Id$
.\"
If the immediately preceding comment is a @(#) format ID marker than the
the $Id$ will line up underneath it with no intervening blank lines.
Otherwise, an additional blank line is inserted.
Approved by: bde
and was also a bit inconsistent: leading blanks, or any double blanks
generated empty arguments, but a trailing blank did not.
PR: bin/2630, bin/10914
Submitted by: Arne Henrik Juul <arnej@imf.unit.no>
execvp() in the child branch of a vfork(). Changed to use fork()
instead.
Some of these (mv, find, apply, xargs) might benefit greatly from
being rewritten to use vfork() properly.
PR: Loosely related to bin/8252
Approved by: jkh and bde
This fix only removes the dependency on compile time constants. The code
has other (old) problems that need to be addressed.
PR: 1791
Reviewed-by: bde, tegge
