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50cbbaa935
This patch adds support to generate the spec array in getconf from the conf.list. The generated code is mostly unchanged. the only changes are due to the change in layout of the spec and val arrays in the ELF. The val array can also be auto-generated from posix-conf-vars.list once the remaining macros are added to it. * posix/posix-conf-vars.list (SPEC:XBS5): Add sysconf prefix. * posix/confstr.c: Define NEED_SPEC_ARRAY to 0. * posix/posix-envs.def: Likewise. * sysdeps/posix/sysconf.c: Likewise. * posix/getconf.c: Define NEED_SPEC_ARRAY to 1. (specs): Remove array. * scripts/gen-posix-conf-vars.awk: Support generation of specs array.
296 lines
8.8 KiB
C
296 lines
8.8 KiB
C
/* Copyright (C) 1991-2014 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, see
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<http://www.gnu.org/licenses/>. */
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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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#include "../version.h"
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#define NEED_SPEC_ARRAY 0
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#include <posix-conf-vars.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 = 1;
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/* Note that this buffer must be large enough for the longest strings
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used below. */
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char restenvs[4 * sizeof "POSIX_V7_LPBIG_OFFBIG"];
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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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/* For _CS_V7_WIDTH_RESTRICTED_ENVS, _CS_V6_WIDTH_RESTRICTED_ENVS
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and _CS_V5_WIDTH_RESTRICTED_ENVS:
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We have to return a newline-separated list of names of
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programming environments 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 environments that the system allows. */
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#define START_ENV_GROUP(VERSION) \
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case _CS_##VERSION##_WIDTH_RESTRICTED_ENVS: \
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string_len = 0;
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#define END_ENV_GROUP(VERSION) \
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restenvs[string_len++] = '\0'; \
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string = restenvs; \
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break;
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#define KNOWN_ABSENT_ENVIRONMENT(SC_PREFIX, ENV_PREFIX, SUFFIX) \
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/* Empty. */
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#define KNOWN_PRESENT_ENV_STRING(STR) \
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if (string_len > 0) \
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restenvs[string_len++] = '\n'; \
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memcpy (restenvs + string_len, STR, \
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sizeof STR - 1); \
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string_len += sizeof STR - 1;
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#define KNOWN_PRESENT_ENVIRONMENT(SC_PREFIX, ENV_PREFIX, SUFFIX) \
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KNOWN_PRESENT_ENV_STRING (#ENV_PREFIX "_" #SUFFIX)
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#define UNKNOWN_ENVIRONMENT(SC_PREFIX, ENV_PREFIX, SUFFIX) \
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if (__sysconf (_SC_##SC_PREFIX##_##SUFFIX) > 0) \
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{ \
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KNOWN_PRESENT_ENVIRONMENT (SC_PREFIX, ENV_PREFIX, SUFFIX) \
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}
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#include "posix-envs.def"
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#undef START_ENV_GROUP
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#undef END_ENV_GROUP
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#undef KNOWN_ABSENT_ENVIRONMENT
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#undef KNOWN_PRESENT_ENV_STRING
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#undef KNOWN_PRESENT_ENVIRONMENT
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#undef UNKNOWN_ENVIRONMENT
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case _CS_XBS5_ILP32_OFF32_CFLAGS:
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case _CS_POSIX_V6_ILP32_OFF32_CFLAGS:
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case _CS_POSIX_V7_ILP32_OFF32_CFLAGS:
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#ifdef __ILP32_OFF32_CFLAGS
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# if CONF_IS_DEFINED_UNSET (_POSIX_V7_ILP32_OFF32)
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# error "__ILP32_OFF32_CFLAGS should not be defined"
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# elif CONF_IS_UNDEFINED (_POSIX_V7_ILP32_OFF32)
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if (__sysconf (_SC_V7_ILP32_OFF32) < 0)
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break;
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# endif
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string = __ILP32_OFF32_CFLAGS;
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string_len = sizeof (__ILP32_OFF32_CFLAGS);
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#endif
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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_POSIX_V7_ILP32_OFFBIG_CFLAGS:
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#ifdef __ILP32_OFFBIG_CFLAGS
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# if CONF_IS_DEFINED_UNSET (_POSIX_V7_ILP32_OFFBIG)
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# error "__ILP32_OFFBIG_CFLAGS should not be defined"
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# elif CONF_IS_UNDEFINED (_POSIX_V7_ILP32_OFFBIG)
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if (__sysconf (_SC_V7_ILP32_OFFBIG) < 0)
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break;
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# endif
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string = __ILP32_OFFBIG_CFLAGS;
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string_len = sizeof (__ILP32_OFFBIG_CFLAGS);
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#endif
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break;
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case _CS_XBS5_LP64_OFF64_CFLAGS:
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case _CS_POSIX_V6_LP64_OFF64_CFLAGS:
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case _CS_POSIX_V7_LP64_OFF64_CFLAGS:
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#ifdef __LP64_OFF64_CFLAGS
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# if CONF_IS_DEFINED_UNSET (_POSIX_V7_LP64_OFF64)
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# error "__LP64_OFF64_CFLAGS should not be defined"
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# elif CONF_IS_UNDEFINED (_POSIX_V7_LP64_OFF64)
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if (__sysconf (_SC_V7_LP64_OFF64) < 0)
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break;
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# endif
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string = __LP64_OFF64_CFLAGS;
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string_len = sizeof (__LP64_OFF64_CFLAGS);
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#endif
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break;
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case _CS_XBS5_ILP32_OFF32_LDFLAGS:
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case _CS_POSIX_V6_ILP32_OFF32_LDFLAGS:
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case _CS_POSIX_V7_ILP32_OFF32_LDFLAGS:
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#ifdef __ILP32_OFF32_LDFLAGS
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# if CONF_IS_DEFINED_UNSET (_POSIX_V7_ILP32_OFF32 )
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# error "__ILP32_OFF32_LDFLAGS should not be defined"
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# elif CONF_IS_UNDEFINED (_POSIX_V7_ILP32_OFF32)
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if (__sysconf (_SC_V7_ILP32_OFF32) < 0)
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break;
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# endif
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string = __ILP32_OFF32_LDFLAGS;
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string_len = sizeof (__ILP32_OFF32_LDFLAGS);
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#endif
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break;
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case _CS_XBS5_ILP32_OFFBIG_LDFLAGS:
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case _CS_POSIX_V6_ILP32_OFFBIG_LDFLAGS:
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case _CS_POSIX_V7_ILP32_OFFBIG_LDFLAGS:
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#ifdef __ILP32_OFFBIG_LDFLAGS
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# if CONF_IS_DEFINED_UNSET (_POSIX_V7_ILP32_OFFBIG)
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# error "__ILP32_OFFBIG_LDFLAGS should not be defined"
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# elif CONF_IS_UNDEFINED (_POSIX_V7_ILP32_OFFBIG)
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if (__sysconf (_SC_V7_ILP32_OFFBIG) < 0)
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break;
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# endif
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string = __ILP32_OFFBIG_LDFLAGS;
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string_len = sizeof (__ILP32_OFFBIG_LDFLAGS);
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#endif
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break;
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case _CS_XBS5_LP64_OFF64_LDFLAGS:
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case _CS_POSIX_V6_LP64_OFF64_LDFLAGS:
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case _CS_POSIX_V7_LP64_OFF64_LDFLAGS:
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#ifdef __LP64_OFF64_LDFLAGS
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# if CONF_IS_DEFINED_UNSET (_POSIX_V7_LP64_OFF64)
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# error "__LP64_OFF64_LDFLAGS should not be defined"
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# elif CONF_IS_UNDEFINED (_POSIX_V7_LP64_OFF64)
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if (__sysconf (_SC_V7_LP64_OFF64) < 0)
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break;
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# endif
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string = __LP64_OFF64_LDFLAGS;
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string_len = sizeof (__LP64_OFF64_LDFLAGS);
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#endif
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break;
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case _CS_LFS_CFLAGS:
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case _CS_LFS_LINTFLAGS:
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#if (CONF_IS_DEFINED_SET (_POSIX_V6_ILP32_OFF32) \
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&& CONF_IS_DEFINED_SET (_POSIX_V6_ILP32_OFFBIG))
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# define __LFS_CFLAGS "-D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64"
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/* Signal that we want the new ABI. */
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string = __LFS_CFLAGS;
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string_len = sizeof (__LFS_CFLAGS);
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#endif
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break;
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case _CS_LFS_LDFLAGS:
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case _CS_LFS_LIBS:
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/* No special libraries or linker flags needed. */
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break;
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case _CS_LFS64_CFLAGS:
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case _CS_LFS64_LINTFLAGS:
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#define __LFS64_CFLAGS "-D_LARGEFILE64_SOURCE"
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string = __LFS64_CFLAGS;
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string_len = sizeof (__LFS64_CFLAGS);
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break;
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case _CS_LFS64_LDFLAGS:
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case _CS_LFS64_LIBS:
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/* No special libraries or linker flags needed. */
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break;
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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_LIBS:
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case _CS_XBS5_ILP32_OFFBIG_LINTFLAGS:
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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_LIBS:
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case _CS_POSIX_V6_ILP32_OFF32_LINTFLAGS:
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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_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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case _CS_POSIX_V7_ILP32_OFF32_LIBS:
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case _CS_POSIX_V7_ILP32_OFF32_LINTFLAGS:
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case _CS_POSIX_V7_ILP32_OFFBIG_LIBS:
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case _CS_POSIX_V7_ILP32_OFFBIG_LINTFLAGS:
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case _CS_POSIX_V7_LP64_OFF64_LIBS:
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case _CS_POSIX_V7_LP64_OFF64_LINTFLAGS:
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case _CS_POSIX_V7_LPBIG_OFFBIG_CFLAGS:
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case _CS_POSIX_V7_LPBIG_OFFBIG_LDFLAGS:
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case _CS_POSIX_V7_LPBIG_OFFBIG_LIBS:
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case _CS_POSIX_V7_LPBIG_OFFBIG_LINTFLAGS:
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/* GNU libc does not require special actions to use LFS functions. */
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break;
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case _CS_GNU_LIBC_VERSION:
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string = "glibc " VERSION;
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string_len = sizeof ("glibc " VERSION);
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break;
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case _CS_GNU_LIBPTHREAD_VERSION:
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#ifdef LIBPTHREAD_VERSION
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string = LIBPTHREAD_VERSION;
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string_len = sizeof LIBPTHREAD_VERSION;
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break;
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#else
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/* No thread library. */
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__set_errno (EINVAL);
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return 0;
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#endif
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case _CS_V6_ENV:
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case _CS_V7_ENV:
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/* Maybe something else is needed in future. */
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string = "POSIXLY_CORRECT=1";
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string_len = sizeof ("POSIXLY_CORRECT=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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libc_hidden_def (confstr)
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