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Reviewed by: Warner Losh <imp@village.org>

Browse source 
Submitted by:	Marc Slemko <marcs@znep.com>
Obtained from:	OpenBSD

Add -0 for reading the results of find -0.
This commit is contained in:
Warner Losh 1996-11-01 18:46:05 +00:00
parent b11ecdd6d0
commit d919888163
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=19318
2 changed files with 29 additions and 5 deletions
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11
usr.bin/xargs/xargs.1
View file

@ -43,6 +43,7 @@
.Nd "construct argument list(s) and execute utility"
.Sh SYNOPSIS
.Nm xargs
.Op Fl 0
.Op Fl t
.Oo Op Fl x
.Fl n Ar number
@ -79,6 +80,16 @@ Any single character, including newlines, may be escaped by a backslash.
.Pp
The options are as follows:
.Bl -tag -width indent
.It Fl 0
Changes
.Nm xargs
to expect NUL
(``\\0'')
characters as seperators, instead of spaces and newlines.
This is expected to be used in concert with the
.Fl print0
function in
.Nm find .
.It Fl n Ar number
Set the maximum number of arguments taken from standard input for each
invocation of the utility.

23
usr.bin/xargs/xargs.c
View file

@ -55,6 +55,7 @@ static char sccsid[] = "@(#)xargs.c 8.1 (Berkeley) 6/6/93";
#include "pathnames.h"
int tflag, rval;
int zflag;
void err __P((const char *, ...));
void run __P((char **));
@ -89,7 +90,7 @@ main(argc, argv, env)
nline -= strlen(*ep++) + 1 + sizeof(*ep);
}
nflag = xflag = 0;
while ((ch = getopt(argc, argv, "n:s:tx")) != EOF)
while ((ch = getopt(argc, argv, "0n:s:tx")) != EOF)
switch(ch) {
case 'n':
nflag = 1;
@ -105,6 +106,9 @@ main(argc, argv, env)
case 'x':
xflag = 1;
break;
case '0':
zflag = 1;
break;
case '?':
default:
usage();
@ -178,10 +182,17 @@ main(argc, argv, env)
case ' ':
case '\t':
/* Quotes escape tabs and spaces. */
if (insingle || indouble)
if (insingle || indouble || zflag)
goto addch;
goto arg2;
case '\0':
if (zflag)
goto arg2;
goto addch;
case '\n':
if (zflag)
goto addch;
/* Empty lines are skipped. */
if (argp == p)
continue;
@ -212,16 +223,18 @@ arg2: *p = '\0';
argp = p;
break;
case '\'':
if (indouble)
if (indouble || zflag)
goto addch;
insingle = !insingle;
break;
case '"':
if (insingle)
if (insingle || zflag)
goto addch;
indouble = !indouble;
break;
case '\\':
if (zflag)
goto addch;
/* Backslash escapes anything, is escaped by quotes. */
if (!insingle && !indouble && (ch = getchar()) == EOF)
err("backslash at EOF");
@ -295,7 +308,7 @@ void
usage()
{
(void)fprintf(stderr,
"usage: xargs [-t] [-n number [-x]] [-s size] [utility [argument ...]]\n");
"usage: xargs [-0] [-t] [-n number [-x]] [-s size] [utility [argument ...]]\n");
exit(1);
}