diff options
Diffstat (limited to 'libc/sysdeps/unix/sysv/linux/sysconf.c')
| -rw-r--r-- | libc/sysdeps/unix/sysv/linux/sysconf.c | 20 |
1 files changed, 19 insertions, 1 deletions
diff --git a/libc/sysdeps/unix/sysv/linux/sysconf.c b/libc/sysdeps/unix/sysv/linux/sysconf.c index f9f6f1bfa..ab9cddc30 100644 --- a/libc/sysdeps/unix/sysv/linux/sysconf.c +++ b/libc/sysdeps/unix/sysv/linux/sysconf.c @@ -1,5 +1,5 @@ /* Get file-specific information about a file. Linux version. - Copyright (C) 2003, 2004, 2006 Free Software Foundation, Inc. + Copyright (C) 2003, 2004, 2006, 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 @@ -23,7 +23,9 @@ #include <sysdep.h> #include <time.h> #include <unistd.h> +#include <sys/resource.h> #include <not-cancel.h> +#include <ldsodefs.h> static long int posix_sysconf (int name); @@ -70,6 +72,22 @@ __sysconf (int name) } #endif + case _SC_ARG_MAX: +#if __LINUX_KERNEL_VERSION < 0x020617 + /* Determine whether this is a kernel 2.6.23 or later. Only + then do we have an argument limit determined by the stack + size. */ + if (GLRO(dl_discover_osversion) () >= 0x020617) +#endif + { + /* 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 ARG_MAX; + case _SC_NGROUPS_MAX: /* Try to read the information from the /proc/sys/kernel/ngroups_max file. */ |