diff options
Diffstat (limited to 'sysdeps/posix/sysconf.c')
| -rw-r--r-- | sysdeps/posix/sysconf.c | 43 |
1 files changed, 35 insertions, 8 deletions
diff --git a/sysdeps/posix/sysconf.c b/sysdeps/posix/sysconf.c index d1286a06fe..de81c2120b 100644 --- a/sysdeps/posix/sysconf.c +++ b/sysdeps/posix/sysconf.c @@ -23,14 +23,20 @@ #include <pwd.h> #include <stddef.h> #include <stdio.h> +#include <stdlib.h> +#include <string.h> #include <time.h> #include <unistd.h> #include <sys/param.h> +#include <sys/stat.h> #include <sys/sysinfo.h> #include <sys/types.h> #include <regex.h> +static long int __sysconf_check_spec (const char *spec); + + /* Get the value of the system variable NAME. */ long int __sysconf (name) @@ -781,50 +787,50 @@ __sysconf (name) #ifdef _XBS5_ILP32_OFF32 return _XBS5_ILP32_OFF32; #else - return -1; + return __sysconf_check_spec ("ILP32_OFF32"); #endif case _SC_XBS5_ILP32_OFFBIG: #ifdef _XBS5_ILP32_OFFBIG return _XBS5_ILP32_OFFBIG; #else - return -1; + return __sysconf_check_spec ("ILP32_OFFBIG"); #endif case _SC_XBS5_LP64_OFF64: #ifdef _XBS5_LP64_OFF64 return _XBS5_LP64_OFF64; #else - return -1; + return __sysconf_check_spec ("LP64_OFF64"); #endif case _SC_XBS5_LPBIG_OFFBIG: #ifdef _XBS5_LPBIG_OFFBIG return _XBS5_LPBIG_OFFBIG; #else - return -1; + return __sysconf_check_spec ("LPBIG_OFFBIG"); #endif case _SC_V6_ILP32_OFF32: #ifdef _POSIX_V6_ILP32_OFF32 return _POSIX_V6_ILP32_OFF32; #else - return -1; + return __sysconf_check_spec ("ILP32_OFF32"); #endif case _SC_V6_ILP32_OFFBIG: #ifdef _POSIX_V6_ILP32_OFFBIG return _POSIX_V6_ILP32_OFFBIG; #else - return -1; + return __sysconf_check_spec ("ILP32_OFFBIG"); #endif case _SC_V6_LP64_OFF64: #ifdef _POSIX_V6_LP64_OFF64 return _POSIX_V6_LP64_OFF64; #else - return -1; + return __sysconf_check_spec ("LP64_OFF64"); #endif case _SC_V6_LPBIG_OFFBIG: #ifdef _POSIX_V6_LPBIG_OFFBIG return _POSIX_V6_LPBIG_OFFBIG; #else - return -1; + return __sysconf_check_spec ("LPBIG_OFFBIG"); #endif case _SC_XOPEN_LEGACY: @@ -1189,3 +1195,24 @@ __sysconf (name) #undef __sysconf weak_alias (__sysconf, sysconf) libc_hidden_def (__sysconf) + +static long int +__sysconf_check_spec (const char *spec) +{ + int save_errno = errno; + + const char *getconf_dir = __secure_getenv ("GETCONF_DIR") ?: GETCONF_DIR; + size_t getconf_dirlen = strlen (getconf_dir); + size_t speclen = strlen (spec); + + char name[getconf_dirlen + sizeof ("/_POSIX_V6_") + speclen]; + memcpy (mempcpy (mempcpy (name, getconf_dir, getconf_dirlen), + "/_POSIX_V6_", sizeof ("/_POSIX_V6_") - 1), + spec, speclen + 1); + + struct stat64 st; + long int ret = __xstat64 (_STAT_VER, name, &st) >= 0 ? 1 : -1; + + __set_errno (save_errno); + return ret; +} |