From f96853beafc26d4f030961b0b67a79b5bfad5733 Mon Sep 17 00:00:00 2001 From: Ulrich Drepper Date: Thu, 27 Mar 2008 15:20:38 +0000 Subject: * sysdeps/unix/sysv/linux/bits/local_lim.h: Undefined ARG_MAX if has defined it. * sysdeps/unix/sysv/linux/sys/param.h: Define NCARGS to the legacy ARG_MAX value and prevent ARG_MAX from being defined by the kernel headers. * sysdeps/unix/sysv/linux/sysconf.c: Define legacy_ARG_MAX and use it instead of ARG_MAX. --- sysdeps/unix/sysv/linux/bits/local_lim.h | 10 +++++++++- sysdeps/unix/sysv/linux/sys/param.h | 18 ++++++++++++++---- sysdeps/unix/sysv/linux/sysconf.c | 9 +++++++-- 3 files changed, 30 insertions(+), 7 deletions(-) (limited to 'sysdeps') diff --git a/sysdeps/unix/sysv/linux/bits/local_lim.h b/sysdeps/unix/sysv/linux/bits/local_lim.h index 54a51ee766..ea2cd446d8 100644 --- a/sysdeps/unix/sysv/linux/bits/local_lim.h +++ b/sysdeps/unix/sysv/linux/bits/local_lim.h @@ -1,5 +1,5 @@ /* Minimum guaranteed maximum values for system limits. Linux version. - Copyright (C) 1993-1998, 2000, 2003, 2004 Free Software Foundation, Inc. + Copyright (C) 1993-1998,2000,2003,2004,2008 Free Software Foundation, Inc. This file is part of the GNU C Library. The GNU C Library is free software; you can redistribute it and/or @@ -31,6 +31,9 @@ #ifndef OPEN_MAX # define __undef_OPEN_MAX #endif +#ifndef ARG_MAX +# define __undef_ARG_MAX +#endif /* The kernel sources contain a file with all the needed information. */ #include @@ -50,6 +53,11 @@ # undef OPEN_MAX # undef __undef_OPEN_MAX #endif +/* Have to remove ARG_MAX? */ +#ifdef __undef_ARG_MAX +# undef ARG_MAX +# undef __undef_ARG_MAX +#endif /* Maximum amount by which a process can descrease its asynchronous I/O priority level. */ diff --git a/sysdeps/unix/sysv/linux/sys/param.h b/sysdeps/unix/sysv/linux/sys/param.h index 0b0424eb90..19c119a2c8 100644 --- a/sysdeps/unix/sysv/linux/sys/param.h +++ b/sysdeps/unix/sysv/linux/sys/param.h @@ -1,4 +1,4 @@ -/* Copyright (C) 1995,1996,1997,2000,2001,2003 Free Software Foundation, Inc. +/* Copyright (C) 1995-1997,2000,2001,2003,2008 Free Software Foundation, Inc. This file is part of the GNU C Library. The GNU C Library is free software; you can redistribute it and/or @@ -19,10 +19,20 @@ #ifndef _SYS_PARAM_H #define _SYS_PARAM_H 1 +#ifndef ARG_MAX +# define __undef_ARG_MAX +#endif + #include #include #include +/* The kernel headers defines ARG_MAX. The value is wrong, though. */ +#ifndef __undef_ARG_MAX +# undef ARG_MAX +# undef __undef_ARG_MAX +#endif + /* BSD names for some values. */ #define NBBY CHAR_BIT @@ -31,12 +41,12 @@ #endif #define MAXSYMLINKS 20 #define CANBSIZ MAX_CANON -#define NCARGS ARG_MAX #define MAXPATHLEN PATH_MAX -/* The following is not really correct but it is a value we used for a +/* The following are not really correct but it is a value we used for a long time and which seems to be usable. People should not use NOFILE - anyway. */ + and NCARGS anyway. */ #define NOFILE 256 +#define NCARGS 131072 #include diff --git a/sysdeps/unix/sysv/linux/sysconf.c b/sysdeps/unix/sysv/linux/sysconf.c index ab9cddc306..f4e36e0c6f 100644 --- a/sysdeps/unix/sysv/linux/sysconf.c +++ b/sysdeps/unix/sysv/linux/sysconf.c @@ -27,6 +27,11 @@ #include #include +/* Legacy value of ARG_MAX. The macro is now not defined since the + actual value varies based on the stack size. */ +#define legacy_ARG_MAX 131072 + + static long int posix_sysconf (int name); @@ -83,10 +88,10 @@ __sysconf (int name) /* Use getrlimit to get the stack limit. */ struct rlimit rlimit; if (__getrlimit (RLIMIT_STACK, &rlimit) == 0) - return MAX (ARG_MAX, rlimit.rlim_cur / 4); + return MAX (legacy_ARG_MAX, rlimit.rlim_cur / 4); } - return ARG_MAX; + return legacy_ARG_MAX; case _SC_NGROUPS_MAX: /* Try to read the information from the /proc/sys/kernel/ngroups_max -- cgit v1.2.3