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Remove compile time dependency on ARG_MAX.

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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
This commit is contained in:
Joseph Koshy 1998-06-17 12:58:43 +00:00
parent a249e02605
commit a3e5bc4fb5
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=37029
1 changed files with 5 additions and 3 deletions
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8
usr.bin/xargs/xargs.c
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@ -45,13 +45,12 @@ static const char copyright[] =
static char sccsid[] = "@(#)xargs.c 8.1 (Berkeley) 6/6/93";
#endif
static const char rcsid[] =
"$Id$";
"$Id: xargs.c,v 1.5 1997/08/27 06:26:23 charnier Exp $";
#endif /* not lint */
#include <sys/types.h>
#include <sys/wait.h>
#include <err.h>
#include <limits.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
@ -73,6 +72,7 @@ main(argc, argv, env)
register char *p, *bbp, *ebp, **bxp, **exp, **xp;
int cnt, indouble, insingle, nargs, nflag, nline, xflag;
char **av, *argp, **ep = env;
long arg_max;
/*
* POSIX.2 limits the exec line length to ARG_MAX - 2K. Running that
@ -88,7 +88,9 @@ main(argc, argv, env)
* probably not worthwhile.
*/
nargs = 5000;
nline = ARG_MAX - 4 * 1024;
if ((arg_max = sysconf(_SC_ARG_MAX)) == -1)
errx(1, "sysconf(_SC_ARG_MAX) failed");
nline = arg_max - 4 * 1024;
while (*ep) {
/* 1 byte for each '\0' */
nline -= strlen(*ep++) + 1 + sizeof(*ep);