/* Copyright (C) 1991, 1996, 1997, 2000, 2001 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 modify it under the terms of the GNU Library General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. The GNU C Library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Library General Public License for more details. You should have received a copy of the GNU Library General Public License along with the GNU C Library; see the file COPYING.LIB. If not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ #include <stddef.h> #include <errno.h> #include <unistd.h> #include <string.h> #include <confstr.h> /* If BUF is not NULL and LEN > 0, fill in at most LEN - 1 bytes of BUF with the value corresponding to NAME and zero-terminate BUF. Return the number of bytes required to hold NAME's entire value. */ size_t confstr (name, buf, len) int name; char *buf; size_t len; { const char *string; size_t string_len; switch (name) { case _CS_PATH: { static const char cs_path[] = CS_PATH; string = cs_path; string_len = sizeof (cs_path); } break; case _CS_XBS5_ILP32_OFFBIG_CFLAGS: case _CS_POSIX_V6_ILP32_OFFBIG_CFLAGS: case _CS_LFS_CFLAGS: #if _XBS5_LP64_OFF64 == -1 && _XBS5_LPBIG_OFFBIG == -1 && _XBS5_ILP32_OFFBIG == 1 /* Signal that we want the new ABI. */ { static const char file_offset[] = "-D_FILE_OFFSET_BITS=64"; string = file_offset; string_len = sizeof (file_offset); } break; #endif case _CS_V6_WIDTH_RESTRICTED_ENVS: /* We have to return a newline-separated list of named of programming environements in which the widths of blksize_t, cc_t, mode_t, nfds_t, pid_t, ptrdiff_t, size_t, speed_t, ssize_t, suseconds_t, tcflag_t, useconds_t, wchar_t, and wint_t types are no greater than the width of type long. Currently this means all environment which the system allows. */ { static const char restenvs[] = #if _POSIX_V6_ILP32_OFF32 > 0 "_POSIX_V6_ILP32_OFF32" #endif #if _POSIX_V6_ILP32_OFFBIG > 0 # if _POSIX_V6_ILP32_OFF32 > 0 "\n" # endif "_POSIX_V6_ILP32_OFFBIG" #endif #if _POSIX_V6_LP64_OFF64 > 0 # if _POSIX_V6_ILP32_OFF32 > 0 || _POSIX_V6_ILP32_OFFBIG > 0 "\n" # endif "_POSIX_V6_LP64_OFF64" #endif #if _POSIX_V6_LPBIG_OFFBIG > 0 # if _POSIX_V6_ILP32_OFF32 > 0 || _POSIX_V6_ILP32_OFFBIG > 0 \ || _POSIX_V6_LP64_OFF64 > 0 "\n" # endif "_POSIX_V6_LPBIG_OFFBIG" #endif ; string = restenvs; string_len = sizeof (restenvs); } break; case _CS_LFS_LINTFLAGS: case _CS_LFS_LDFLAGS: case _CS_LFS_LIBS: case _CS_LFS64_CFLAGS: case _CS_LFS64_LINTFLAGS: case _CS_LFS64_LDFLAGS: case _CS_LFS64_LIBS: case _CS_XBS5_ILP32_OFF32_CFLAGS: case _CS_XBS5_ILP32_OFF32_LDFLAGS: case _CS_XBS5_ILP32_OFF32_LIBS: case _CS_XBS5_ILP32_OFF32_LINTFLAGS: case _CS_XBS5_ILP32_OFFBIG_LDFLAGS: case _CS_XBS5_ILP32_OFFBIG_LIBS: case _CS_XBS5_ILP32_OFFBIG_LINTFLAGS: case _CS_XBS5_LP64_OFF64_CFLAGS: case _CS_XBS5_LP64_OFF64_LDFLAGS: case _CS_XBS5_LP64_OFF64_LIBS: case _CS_XBS5_LP64_OFF64_LINTFLAGS: case _CS_XBS5_LPBIG_OFFBIG_CFLAGS: case _CS_XBS5_LPBIG_OFFBIG_LDFLAGS: case _CS_XBS5_LPBIG_OFFBIG_LIBS: case _CS_XBS5_LPBIG_OFFBIG_LINTFLAGS: case _CS_POSIX_V6_ILP32_OFF32_CFLAGS: case _CS_POSIX_V6_ILP32_OFF32_LDFLAGS: case _CS_POSIX_V6_ILP32_OFF32_LIBS: case _CS_POSIX_V6_ILP32_OFF32_LINTFLAGS: case _CS_POSIX_V6_ILP32_OFFBIG_LDFLAGS: case _CS_POSIX_V6_ILP32_OFFBIG_LIBS: case _CS_POSIX_V6_ILP32_OFFBIG_LINTFLAGS: case _CS_POSIX_V6_LP64_OFF64_CFLAGS: case _CS_POSIX_V6_LP64_OFF64_LDFLAGS: case _CS_POSIX_V6_LP64_OFF64_LIBS: case _CS_POSIX_V6_LP64_OFF64_LINTFLAGS: case _CS_POSIX_V6_LPBIG_OFFBIG_CFLAGS: case _CS_POSIX_V6_LPBIG_OFFBIG_LDFLAGS: case _CS_POSIX_V6_LPBIG_OFFBIG_LIBS: case _CS_POSIX_V6_LPBIG_OFFBIG_LINTFLAGS: /* GNU libc does not require special actions to use LFS functions. */ string = ""; string_len = 1; break; default: __set_errno (EINVAL); return 0; } if (len > 0 && buf != NULL) { if (string_len <= len) memcpy (buf, string, string_len); else { memcpy (buf, string, len - 1); buf[len - 1] = '\0'; } } return string_len; }