162 lines
4.6 KiB
C
162 lines
4.6 KiB
C
/* Copyright (C) 1991, 1996, 1997, 2000, 2001 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, write to the Free
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Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
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02111-1307 USA. */
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#define _GNU_SOURCE 1
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#include <stddef.h>
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#include <errno.h>
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#include <unistd.h>
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#include <string.h>
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#include <confstr.h>
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/* If BUF is not NULL and LEN > 0, fill in at most LEN - 1 bytes
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of BUF with the value corresponding to NAME and zero-terminate BUF.
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Return the number of bytes required to hold NAME's entire value. */
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size_t
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confstr (name, buf, len)
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int name;
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char *buf;
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size_t len;
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{
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const char *string;
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size_t string_len;
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switch (name)
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{
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case _CS_PATH:
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{
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static const char cs_path[] = CS_PATH;
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string = cs_path;
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string_len = sizeof (cs_path);
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}
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break;
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case _CS_V6_WIDTH_RESTRICTED_ENVS:
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/* We have to return a newline-separated list of named of
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programming environements in which the widths of blksize_t,
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cc_t, mode_t, nfds_t, pid_t, ptrdiff_t, size_t, speed_t,
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ssize_t, suseconds_t, tcflag_t, useconds_t, wchar_t, and
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wint_t types are no greater than the width of type long.
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Currently this means all environment which the system allows. */
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{
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static const char restenvs[] =
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#if _POSIX_V6_ILP32_OFF32 > 0
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"_POSIX_V6_ILP32_OFF32"
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#endif
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#if _POSIX_V6_ILP32_OFFBIG > 0
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# if _POSIX_V6_ILP32_OFF32 > 0
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"\n"
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# endif
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"_POSIX_V6_ILP32_OFFBIG"
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#endif
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#if _POSIX_V6_LP64_OFF64 > 0
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# if _POSIX_V6_ILP32_OFF32 > 0 || _POSIX_V6_ILP32_OFFBIG > 0
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"\n"
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# endif
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"_POSIX_V6_LP64_OFF64"
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#endif
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#if _POSIX_V6_LPBIG_OFFBIG > 0
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# if _POSIX_V6_ILP32_OFF32 > 0 || _POSIX_V6_ILP32_OFFBIG > 0 \
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|| _POSIX_V6_LP64_OFF64 > 0
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"\n"
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# endif
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"_POSIX_V6_LPBIG_OFFBIG"
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#endif
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;
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string = restenvs;
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string_len = sizeof (restenvs);
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}
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break;
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case _CS_XBS5_ILP32_OFFBIG_CFLAGS:
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case _CS_POSIX_V6_ILP32_OFFBIG_CFLAGS:
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case _CS_LFS_CFLAGS:
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#if _XBS5_LP64_OFF64 == -1 && _XBS5_LPBIG_OFFBIG == -1 && _XBS5_ILP32_OFFBIG == 1
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/* Signal that we want the new ABI. */
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{
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static const char file_offset[] = "-D_FILE_OFFSET_BITS=64";
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string = file_offset;
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string_len = sizeof (file_offset);
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}
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break;
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#endif
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/* FALLTHROUGH */
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case _CS_LFS_LINTFLAGS:
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case _CS_LFS_LDFLAGS:
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case _CS_LFS_LIBS:
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case _CS_LFS64_CFLAGS:
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case _CS_LFS64_LINTFLAGS:
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case _CS_LFS64_LDFLAGS:
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case _CS_LFS64_LIBS:
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case _CS_XBS5_ILP32_OFF32_CFLAGS:
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case _CS_XBS5_ILP32_OFF32_LDFLAGS:
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case _CS_XBS5_ILP32_OFF32_LIBS:
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case _CS_XBS5_ILP32_OFF32_LINTFLAGS:
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case _CS_XBS5_ILP32_OFFBIG_LDFLAGS:
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case _CS_XBS5_ILP32_OFFBIG_LIBS:
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case _CS_XBS5_ILP32_OFFBIG_LINTFLAGS:
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case _CS_XBS5_LP64_OFF64_CFLAGS:
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case _CS_XBS5_LP64_OFF64_LDFLAGS:
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case _CS_XBS5_LP64_OFF64_LIBS:
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case _CS_XBS5_LP64_OFF64_LINTFLAGS:
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case _CS_XBS5_LPBIG_OFFBIG_CFLAGS:
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case _CS_XBS5_LPBIG_OFFBIG_LDFLAGS:
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case _CS_XBS5_LPBIG_OFFBIG_LIBS:
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case _CS_XBS5_LPBIG_OFFBIG_LINTFLAGS:
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case _CS_POSIX_V6_ILP32_OFF32_CFLAGS:
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case _CS_POSIX_V6_ILP32_OFF32_LDFLAGS:
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case _CS_POSIX_V6_ILP32_OFF32_LIBS:
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case _CS_POSIX_V6_ILP32_OFF32_LINTFLAGS:
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case _CS_POSIX_V6_ILP32_OFFBIG_LDFLAGS:
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case _CS_POSIX_V6_ILP32_OFFBIG_LIBS:
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case _CS_POSIX_V6_ILP32_OFFBIG_LINTFLAGS:
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case _CS_POSIX_V6_LP64_OFF64_CFLAGS:
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case _CS_POSIX_V6_LP64_OFF64_LDFLAGS:
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case _CS_POSIX_V6_LP64_OFF64_LIBS:
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case _CS_POSIX_V6_LP64_OFF64_LINTFLAGS:
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case _CS_POSIX_V6_LPBIG_OFFBIG_CFLAGS:
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case _CS_POSIX_V6_LPBIG_OFFBIG_LDFLAGS:
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case _CS_POSIX_V6_LPBIG_OFFBIG_LIBS:
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case _CS_POSIX_V6_LPBIG_OFFBIG_LINTFLAGS:
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/* GNU libc does not require special actions to use LFS functions. */
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string = "";
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string_len = 1;
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break;
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default:
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__set_errno (EINVAL);
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return 0;
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}
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if (len > 0 && buf != NULL)
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{
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if (string_len <= len)
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memcpy (buf, string, string_len);
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else
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{
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memcpy (buf, string, len - 1);
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buf[len - 1] = '\0';
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}
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}
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return string_len;
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}
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