/* Copyright (C) 1991,1996,1997,2000-2004,2009 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 Lesser General Public License as published by the Free Software Foundation; either version 2.1 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 Lesser General Public License for more details. You should have received a copy of the GNU Lesser General Public License along with the GNU C Library; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. */ #include #include #include #include #include #include "../version.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 = 1; switch (name) { case _CS_PATH: { static const char cs_path[] = CS_PATH; string = cs_path; string_len = sizeof (cs_path); } break; case _CS_V7_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. */ { char restenvs[4 * sizeof "POSIX_V7_LPBIG_OFFBIG"]; string_len = 0; #ifndef _POSIX_V7_ILP32_OFF32 if (__sysconf (_SC_V7_ILP32_OFF32) > 0) #endif #if !defined _POSIX_V7_ILP32_OFF32 || _POSIX_V7_ILP32_OFF32 > 0 { memcpy (restenvs + string_len, "POSIX_V7_ILP32_OFF32", sizeof "POSIX_V7_ILP32_OFF32" - 1); string_len += sizeof "POSIX_V7_ILP32_OFF32" - 1; } #endif #ifndef _POSIX_V7_ILP32_OFFBIG if (__sysconf (_SC_V7_ILP32_OFFBIG) > 0) #endif #if !defined _POSIX_V7_ILP32_OFFBIG || _POSIX_V7_ILP32_OFFBIG > 0 { if (string_len) restenvs[string_len++] = '\n'; memcpy (restenvs + string_len, "POSIX_V7_ILP32_OFFBIG", sizeof "POSIX_V7_ILP32_OFFBIG" - 1); string_len += sizeof "POSIX_V7_ILP32_OFFBIG" - 1; } #endif #ifndef _POSIX_V7_LP64_OFF64 if (__sysconf (_SC_V7_LP64_OFF64) > 0) #endif #if !defined _POSIX_V7_LP64_OFF64 || _POSIX_V7_LP64_OFF64 > 0 { if (string_len) restenvs[string_len++] = '\n'; memcpy (restenvs + string_len, "POSIX_V7_LP64_OFF64", sizeof "POSIX_V7_LP64_OFF64" - 1); string_len += sizeof "POSIX_V7_LP64_OFF64" - 1; } #endif #ifndef _POSIX_V7_LPBIG_OFFBIG if (__sysconf (_SC_V7_LPBIG_OFFBIG) > 0) #endif #if !defined _POSIX_V7_LPBIG_OFFBIG || _POSIX_V7_LPBIG_OFFBIG > 0 { if (string_len) restenvs[string_len++] = '\n'; memcpy (restenvs + string_len, "POSIX_V7_LPBIG_OFFBIG", sizeof "POSIX_V7_LPBIG_OFFBIG" - 1); string_len += sizeof "POSIX_V7_LPBIG_OFFBIG" - 1; } #endif restenvs[string_len++] = '\0'; string = restenvs; } break; 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. */ { char restenvs[4 * sizeof "POSIX_V6_LPBIG_OFFBIG"]; string_len = 0; #ifndef _POSIX_V6_ILP32_OFF32 if (__sysconf (_SC_V6_ILP32_OFF32) > 0) #endif #if !defined _POSIX_V6_ILP32_OFF32 || _POSIX_V6_ILP32_OFF32 > 0 { memcpy (restenvs + string_len, "POSIX_V6_ILP32_OFF32", sizeof "POSIX_V6_ILP32_OFF32" - 1); string_len += sizeof "POSIX_V6_ILP32_OFF32" - 1; } #endif #ifndef _POSIX_V6_ILP32_OFFBIG if (__sysconf (_SC_V6_ILP32_OFFBIG) > 0) #endif #if !defined _POSIX_V6_ILP32_OFFBIG || _POSIX_V6_ILP32_OFFBIG > 0 { if (string_len) restenvs[string_len++] = '\n'; memcpy (restenvs + string_len, "POSIX_V6_ILP32_OFFBIG", sizeof "POSIX_V6_ILP32_OFFBIG" - 1); string_len += sizeof "POSIX_V6_ILP32_OFFBIG" - 1; } #endif #ifndef _POSIX_V6_LP64_OFF64 if (__sysconf (_SC_V6_LP64_OFF64) > 0) #endif #if !defined _POSIX_V6_LP64_OFF64 || _POSIX_V6_LP64_OFF64 > 0 { if (string_len) restenvs[string_len++] = '\n'; memcpy (restenvs + string_len, "POSIX_V6_LP64_OFF64", sizeof "POSIX_V6_LP64_OFF64" - 1); string_len += sizeof "POSIX_V6_LP64_OFF64" - 1; } #endif #ifndef _POSIX_V6_LPBIG_OFFBIG if (__sysconf (_SC_V6_LPBIG_OFFBIG) > 0) #endif #if !defined _POSIX_V6_LPBIG_OFFBIG || _POSIX_V6_LPBIG_OFFBIG > 0 { if (string_len) restenvs[string_len++] = '\n'; memcpy (restenvs + string_len, "POSIX_V6_LPBIG_OFFBIG", sizeof "POSIX_V6_LPBIG_OFFBIG" - 1); string_len += sizeof "POSIX_V6_LPBIG_OFFBIG" - 1; } #endif restenvs[string_len++] = '\0'; string = restenvs; } break; case _CS_V5_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. */ { char restenvs[4 * sizeof "XBS5_LPBIG_OFFBIG"]; string_len = 0; #ifndef _XBS5_ILP32_OFF32 if (__sysconf (_SC_XBS5_ILP32_OFF32) > 0) #endif #if !defined _XBS5_ILP32_OFF32 || _XBS5_ILP32_OFF32 > 0 { memcpy (restenvs + string_len, "XBS5_ILP32_OFF32", sizeof "XBS5_ILP32_OFF32" - 1); string_len += sizeof "XBS5_ILP32_OFF32" - 1; } #endif #ifndef _XBS5_ILP32_OFFBIG if (__sysconf (_SC_XBS5_ILP32_OFFBIG) > 0) #endif #if !defined _XBS5_ILP32_OFFBIG || _XBS5_ILP32_OFFBIG > 0 { if (string_len) restenvs[string_len++] = '\n'; memcpy (restenvs + string_len, "XBS5_ILP32_OFFBIG", sizeof "XBS5_ILP32_OFFBIG" - 1); string_len += sizeof "XBS5_ILP32_OFFBIG" - 1; } #endif #ifndef _XBS5_LP64_OFF64 if (__sysconf (_SC_XBS5_LP64_OFF64) > 0) #endif #if !defined _XBS5_LP64_OFF64 || _XBS5_LP64_OFF64 > 0 { if (string_len) restenvs[string_len++] = '\n'; memcpy (restenvs + string_len, "XBS5_LP64_OFF64", sizeof "XBS5_LP64_OFF64" - 1); string_len += sizeof "XBS5_LP64_OFF64" - 1; } #endif #ifndef _XBS5_LPBIG_OFFBIG if (__sysconf (_SC_XBS5_LPBIG_OFFBIG) > 0) #endif #if !defined _XBS5_LPBIG_OFFBIG || _XBS5_LPBIG_OFFBIG > 0 { if (string_len) restenvs[string_len++] = '\n'; memcpy (restenvs + string_len, "XBS5_LPBIG_OFFBIG", sizeof "XBS5_LPBIG_OFFBIG" - 1); string_len += sizeof "XBS5_LPBIG_OFFBIG" - 1; } #endif restenvs[string_len++] = '\0'; string = restenvs; } break; case _CS_XBS5_ILP32_OFF32_CFLAGS: case _CS_POSIX_V6_ILP32_OFF32_CFLAGS: case _CS_POSIX_V7_ILP32_OFF32_CFLAGS: #ifdef __ILP32_OFF32_CFLAGS # if _POSIX_V7_ILP32_OFF32 == -1 # error "__ILP32_OFF32_CFLAGS should not be defined" # elif !defined _POSIX_V7_ILP32_OFF32 if (__sysconf (_SC_V7_ILP32_OFF32) < 0) break; # endif string = __ILP32_OFF32_CFLAGS; string_len = sizeof (__ILP32_OFF32_CFLAGS); #endif break; case _CS_XBS5_ILP32_OFFBIG_CFLAGS: case _CS_POSIX_V6_ILP32_OFFBIG_CFLAGS: case _CS_POSIX_V7_ILP32_OFFBIG_CFLAGS: #ifdef __ILP32_OFFBIG_CFLAGS # if _POSIX_V7_ILP32_OFFBIG == -1 # error "__ILP32_OFFBIG_CFLAGS should not be defined" # elif !defined _POSIX_V7_ILP32_OFFBIG if (__sysconf (_SC_V7_ILP32_OFFBIG) < 0) break; # endif string = __ILP32_OFFBIG_CFLAGS; string_len = sizeof (__ILP32_OFFBIG_CFLAGS); #endif break; case _CS_XBS5_LP64_OFF64_CFLAGS: case _CS_POSIX_V6_LP64_OFF64_CFLAGS: case _CS_POSIX_V7_LP64_OFF64_CFLAGS: #ifdef __LP64_OFF64_CFLAGS # if _POSIX_V7_LP64_OFF64 == -1 # error "__LP64_OFF64_CFLAGS should not be defined" # elif !defined _POSIX_V7_LP64_OFF64 if (__sysconf (_SC_V7_LP64_OFF64) < 0) break; # endif string = __LP64_OFF64_CFLAGS; string_len = sizeof (__LP64_OFF64_CFLAGS); #endif break; case _CS_XBS5_ILP32_OFF32_LDFLAGS: case _CS_POSIX_V6_ILP32_OFF32_LDFLAGS: case _CS_POSIX_V7_ILP32_OFF32_LDFLAGS: #ifdef __ILP32_OFF32_LDFLAGS # if _POSIX_V7_ILP32_OFF32 == -1 # error "__ILP32_OFF32_LDFLAGS should not be defined" # elif !defined _POSIX_V7_ILP32_OFF32 if (__sysconf (_SC_V7_ILP32_OFF32) < 0) break; # endif string = __ILP32_OFF32_LDFLAGS; string_len = sizeof (__ILP32_OFF32_LDFLAGS); #endif break; case _CS_XBS5_ILP32_OFFBIG_LDFLAGS: case _CS_POSIX_V6_ILP32_OFFBIG_LDFLAGS: case _CS_POSIX_V7_ILP32_OFFBIG_LDFLAGS: #ifdef __ILP32_OFFBIG_LDFLAGS # if _POSIX_V7_ILP32_OFFBIG == -1 # error "__ILP32_OFFBIG_LDFLAGS should not be defined" # elif !defined _POSIX_V7_ILP32_OFFBIG if (__sysconf (_SC_V7_ILP32_OFFBIG) < 0) break; # endif string = __ILP32_OFFBIG_LDFLAGS; string_len = sizeof (__ILP32_OFFBIG_LDFLAGS); #endif break; case _CS_XBS5_LP64_OFF64_LDFLAGS: case _CS_POSIX_V6_LP64_OFF64_LDFLAGS: case _CS_POSIX_V7_LP64_OFF64_LDFLAGS: #ifdef __LP64_OFF64_LDFLAGS # if _POSIX_V7_LP64_OFF64 == -1 # error "__LP64_OFF64_LDFLAGS should not be defined" # elif !defined _POSIX_V7_LP64_OFF64 if (__sysconf (_SC_V7_LP64_OFF64) < 0) break; # endif string = __LP64_OFF64_LDFLAGS; string_len = sizeof (__LP64_OFF64_LDFLAGS); #endif break; case _CS_LFS_CFLAGS: case _CS_LFS_LINTFLAGS: #if _POSIX_V6_ILP32_OFF32 == 1 && _POSIX_V6_ILP32_OFFBIG == 1 # define __LFS_CFLAGS "-D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64" /* Signal that we want the new ABI. */ string = __LFS_CFLAGS; string_len = sizeof (__LFS_CFLAGS); #endif break; case _CS_LFS_LDFLAGS: case _CS_LFS_LIBS: /* No special libraries or linker flags needed. */ break; case _CS_LFS64_CFLAGS: case _CS_LFS64_LINTFLAGS: #define __LFS64_CFLAGS "-D_LARGEFILE64_SOURCE" string = __LFS64_CFLAGS; string_len = sizeof (__LFS64_CFLAGS); break; case _CS_LFS64_LDFLAGS: case _CS_LFS64_LIBS: /* No special libraries or linker flags needed. */ break; case _CS_XBS5_ILP32_OFF32_LIBS: case _CS_XBS5_ILP32_OFF32_LINTFLAGS: case _CS_XBS5_ILP32_OFFBIG_LIBS: case _CS_XBS5_ILP32_OFFBIG_LINTFLAGS: 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_LIBS: case _CS_POSIX_V6_ILP32_OFF32_LINTFLAGS: case _CS_POSIX_V6_ILP32_OFFBIG_LIBS: case _CS_POSIX_V6_ILP32_OFFBIG_LINTFLAGS: 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: case _CS_POSIX_V7_ILP32_OFF32_LIBS: case _CS_POSIX_V7_ILP32_OFF32_LINTFLAGS: case _CS_POSIX_V7_ILP32_OFFBIG_LIBS: case _CS_POSIX_V7_ILP32_OFFBIG_LINTFLAGS: case _CS_POSIX_V7_LP64_OFF64_LIBS: case _CS_POSIX_V7_LP64_OFF64_LINTFLAGS: case _CS_POSIX_V7_LPBIG_OFFBIG_CFLAGS: case _CS_POSIX_V7_LPBIG_OFFBIG_LDFLAGS: case _CS_POSIX_V7_LPBIG_OFFBIG_LIBS: case _CS_POSIX_V7_LPBIG_OFFBIG_LINTFLAGS: /* GNU libc does not require special actions to use LFS functions. */ break; case _CS_GNU_LIBC_VERSION: string = "glibc " VERSION; string_len = sizeof ("glibc " VERSION); break; case _CS_GNU_LIBPTHREAD_VERSION: #ifdef LIBPTHREAD_VERSION string = LIBPTHREAD_VERSION; string_len = sizeof LIBPTHREAD_VERSION; break; #else /* No thread library. */ __set_errno (EINVAL); return 0; #endif 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; } libc_hidden_def (confstr)