/* Copyright (C) 1991, 93, 95, 96, 97, 2000 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 <errno.h> #include <limits.h> #include <grp.h> #include <pwd.h> #include <stddef.h> #include <stdio.h> #include <stdlib.h> #include <time.h> #include <unistd.h> #include <sys/sysinfo.h> #include <sys/types.h> #include <regex.h> /***********************************************************************/ /* * Manuel Novoa III Jan 2001 * * On i386, the switch-based implementation generates 796 bytes of code. * However, many of the return values are repeats. By collecting these * repeats and moving to a table-based implementation, we generate 283 * bytes on i386 (-Os -fomit-frame-pointer). */ #ifndef _UCLIBC_GENERATE_SYSCONF_MAIN #ifdef _UCLIBC_GENERATE_SYSCONF_ARCH /* * Set some errno's so the auto-gen code knows what it is dealing with. * 1) ENOSYS signifies that we're returning a default value. * This is just extra info for development. * 2) EISNAM signifies that the value returned varies at runtime. * * Option: GETPAGESIZE_IS_DYNAMIC * The current implementation of getpagesize in uClibc returns * a constant. The pagesize on the target arch should not vary, * so it should be safe to set this as 0. */ #define RETURN_NEG_1 __set_errno(ENOSYS); return -1 #define RETURN_FUNCTION(f) __set_errno(EISNAM); return (long int) #f #define GETPAGESIZE_IS_DYNAMIC 0 #else #define RETURN_NEG_1 return -1 #define RETURN_FUNCTION(f) return f; #endif /* _UCLIBC_GENERATE_SYSCONF_ARCH */ /* Get the value of the system variable NAME. */ long int sysconf(int name) { switch (name) { default: __set_errno(EINVAL); return -1; case _SC_ARG_MAX: #ifdef ARG_MAX return ARG_MAX; #else RETURN_NEG_1; #endif case _SC_CHILD_MAX: #ifdef CHILD_MAX return CHILD_MAX; #else RETURN_NEG_1; #endif case _SC_CLK_TCK: #ifdef CLK_TCK return CLK_TCK; #else return 60; #endif case _SC_NGROUPS_MAX: #ifdef NGROUPS_MAX return NGROUPS_MAX; #else RETURN_NEG_1; #endif case _SC_OPEN_MAX: #if 1 RETURN_FUNCTION(getdtablesize()); #else RETURN_NEG_1; #endif case _SC_STREAM_MAX: #ifdef STREAM_MAX return STREAM_MAX; #else return FOPEN_MAX; #endif case _SC_TZNAME_MAX: #if 0 RETURN_FUNCTION(tzname_max ()); #else RETURN_NEG_1; #endif case _SC_JOB_CONTROL: #ifdef _POSIX_JOB_CONTROL return 1; #else RETURN_NEG_1; #endif case _SC_SAVED_IDS: #ifdef _POSIX_SAVED_IDS return 1; #else RETURN_NEG_1; #endif case _SC_REALTIME_SIGNALS: #ifdef _POSIX_REALTIME_SIGNALS return 1; #else RETURN_NEG_1; #endif case _SC_PRIORITY_SCHEDULING: #ifdef _POSIX_PRIORITY_SCHEDULING return 1; #else RETURN_NEG_1; #endif case _SC_TIMERS: #ifdef _POSIX_TIMERS return 1; #else RETURN_NEG_1; #endif case _SC_ASYNCHRONOUS_IO: #ifdef _POSIX_ASYNCHRONOUS_IO return 1; #else RETURN_NEG_1; #endif case _SC_PRIORITIZED_IO: #ifdef _POSIX_PRIORITIZED_IO return 1; #else RETURN_NEG_1; #endif case _SC_SYNCHRONIZED_IO: #ifdef _POSIX_SYNCHRONIZED_IO return 1; #else RETURN_NEG_1; #endif case _SC_FSYNC: #ifdef _POSIX_FSYNC return 1; #else RETURN_NEG_1; #endif case _SC_MAPPED_FILES: #ifdef _POSIX_MAPPED_FILES return 1; #else RETURN_NEG_1; #endif case _SC_MEMLOCK: #ifdef _POSIX_MEMLOCK return 1; #else RETURN_NEG_1; #endif case _SC_MEMLOCK_RANGE: #ifdef _POSIX_MEMLOCK_RANGE return 1; #else RETURN_NEG_1; #endif case _SC_MEMORY_PROTECTION: #ifdef _POSIX_MEMORY_PROTECTION return 1; #else RETURN_NEG_1; #endif case _SC_MESSAGE_PASSING: #ifdef _POSIX_MESSAGE_PASSING return 1; #else RETURN_NEG_1; #endif case _SC_SEMAPHORES: #ifdef _POSIX_SEMAPHORES return 1; #else RETURN_NEG_1; #endif case _SC_SHARED_MEMORY_OBJECTS: #ifdef _POSIX_SHARED_MEMORY_OBJECTS return 1; #else RETURN_NEG_1; #endif case _SC_VERSION: return _POSIX_VERSION; case _SC_PAGESIZE: #if defined(GETPAGESIZE_IS_DYNAMIC) && (GETPAGESIZE_IS_DYNAMIC == 1) RETURN_FUNCTION(getpagesize()); #else return getpagesize(); /* note: currently this is not dynamic */ #endif case _SC_AIO_LISTIO_MAX: #ifdef AIO_LISTIO_MAX return AIO_LISTIO_MAX; #else RETURN_NEG_1; #endif case _SC_AIO_MAX: #ifdef AIO_MAX return AIO_MAX; #else RETURN_NEG_1; #endif case _SC_AIO_PRIO_DELTA_MAX: #ifdef AIO_PRIO_DELTA_MAX return AIO_PRIO_DELTA_MAX; #else RETURN_NEG_1; #endif case _SC_DELAYTIMER_MAX: #ifdef DELAYTIMER_MAX return DELAYTIMER_MAX; #else RETURN_NEG_1; #endif case _SC_MQ_OPEN_MAX: #ifdef MQ_OPEN_MAX return MQ_OPEN_MAX; #else RETURN_NEG_1; #endif case _SC_MQ_PRIO_MAX: #ifdef MQ_PRIO_MAX return MQ_PRIO_MAX; #else RETURN_NEG_1; #endif case _SC_RTSIG_MAX: #ifdef RTSIG_MAX return RTSIG_MAX; #else RETURN_NEG_1; #endif case _SC_SEM_NSEMS_MAX: #ifdef SEM_NSEMS_MAX return SEM_NSEMS_MAX; #else RETURN_NEG_1; #endif case _SC_SEM_VALUE_MAX: #ifdef SEM_VALUE_MAX return SEM_VALUE_MAX; #else RETURN_NEG_1; #endif case _SC_SIGQUEUE_MAX: #ifdef SIGQUEUE_MAX return SIGQUEUE_MAX; #else RETURN_NEG_1; #endif case _SC_TIMER_MAX: #ifdef TIMER_MAX return TIMER_MAX; #else RETURN_NEG_1; #endif case _SC_BC_BASE_MAX: #ifdef BC_BASE_MAX return BC_BASE_MAX; #else RETURN_NEG_1; #endif case _SC_BC_DIM_MAX: #ifdef BC_DIM_MAX return BC_DIM_MAX; #else RETURN_NEG_1; #endif case _SC_BC_SCALE_MAX: #ifdef BC_SCALE_MAX return BC_SCALE_MAX; #else RETURN_NEG_1; #endif case _SC_BC_STRING_MAX: #ifdef BC_STRING_MAX return BC_STRING_MAX; #else RETURN_NEG_1; #endif case _SC_COLL_WEIGHTS_MAX: #ifdef COLL_WEIGHTS_MAX return COLL_WEIGHTS_MAX; #else RETURN_NEG_1; #endif case _SC_EQUIV_CLASS_MAX: #ifdef EQUIV_CLASS_MAX return EQUIV_CLASS_MAX; #else RETURN_NEG_1; #endif case _SC_EXPR_NEST_MAX: #ifdef EXPR_NEST_MAX return EXPR_NEST_MAX; #else RETURN_NEG_1; #endif case _SC_LINE_MAX: #ifdef LINE_MAX return LINE_MAX; #else RETURN_NEG_1; #endif case _SC_RE_DUP_MAX: #ifdef RE_DUP_MAX return RE_DUP_MAX; #else RETURN_NEG_1; #endif case _SC_CHARCLASS_NAME_MAX: #ifdef CHARCLASS_NAME_MAX return CHARCLASS_NAME_MAX; #else RETURN_NEG_1; #endif case _SC_PII: #ifdef _POSIX_PII return 1; #else RETURN_NEG_1; #endif case _SC_PII_XTI: #ifdef _POSIX_PII_XTI return 1; #else RETURN_NEG_1; #endif case _SC_PII_SOCKET: #ifdef _POSIX_PII_SOCKET return 1; #else RETURN_NEG_1; #endif case _SC_PII_INTERNET: #ifdef _POSIX_PII_INTERNET return 1; #else RETURN_NEG_1; #endif case _SC_PII_OSI: #ifdef _POSIX_PII_OSI return 1; #else RETURN_NEG_1; #endif case _SC_POLL: #ifdef _POSIX_POLL return 1; #else RETURN_NEG_1; #endif case _SC_SELECT: #ifdef _POSIX_SELECT return 1; #else RETURN_NEG_1; #endif case _SC_UIO_MAXIOV: #ifdef UIO_MAXIOV return UIO_MAXIOV; #else RETURN_NEG_1; #endif case _SC_PII_INTERNET_STREAM: #ifdef _POSIX_PII_INTERNET_STREAM return 1; #else RETURN_NEG_1; #endif case _SC_PII_INTERNET_DGRAM: #ifdef _POSIX_PII_INTERNET_DGRAM return 1; #else RETURN_NEG_1; #endif case _SC_PII_OSI_COTS: #ifdef _POSIX_PII_OSI_COTS return 1; #else RETURN_NEG_1; #endif case _SC_PII_OSI_CLTS: #ifdef _POSIX_PII_OSI_CLTS return 1; #else RETURN_NEG_1; #endif case _SC_PII_OSI_M: #ifdef _POSIX_PII_OSI_M return 1; #else RETURN_NEG_1; #endif case _SC_T_IOV_MAX: #ifdef _T_IOV_MAX return _T_IOV_MAX; #else RETURN_NEG_1; #endif case _SC_2_VERSION: return _POSIX2_VERSION; case _SC_2_C_BIND: #ifdef _POSIX2_C_BIND return _POSIX2_C_BIND; #else RETURN_NEG_1; #endif case _SC_2_C_DEV: #ifdef _POSIX2_C_DEV return _POSIX2_C_DEV; #else RETURN_NEG_1; #endif case _SC_2_C_VERSION: #ifdef _POSIX2_C_VERSION return _POSIX2_C_VERSION; #else RETURN_NEG_1; #endif case _SC_2_FORT_DEV: #ifdef _POSIX2_FORT_DEV return _POSIX2_FORT_DEV; #else RETURN_NEG_1; #endif case _SC_2_FORT_RUN: #ifdef _POSIX2_FORT_RUN return _POSIX2_FORT_RUN; #else RETURN_NEG_1; #endif case _SC_2_LOCALEDEF: #ifdef _POSIX2_LOCALEDEF return _POSIX2_LOCALEDEF; #else RETURN_NEG_1; #endif case _SC_2_SW_DEV: #ifdef _POSIX2_SW_DEV return _POSIX2_SW_DEV; #else RETURN_NEG_1; #endif case _SC_2_CHAR_TERM: #ifdef _POSIX2_CHAR_TERM return _POSIX2_CHAR_TERM; #else RETURN_NEG_1; #endif case _SC_2_UPE: #ifdef _POSIX2_UPE return _POSIX2_UPE; #else RETURN_NEG_1; #endif /* POSIX 1003.1c (POSIX Threads). */ case _SC_THREADS: #ifdef _POSIX_THREADS return 1; #else RETURN_NEG_1; #endif case _SC_THREAD_SAFE_FUNCTIONS: #ifdef _POSIX_THREAD_SAFE_FUNCTIONS return 1; #else RETURN_NEG_1; #endif case _SC_GETGR_R_SIZE_MAX: #ifdef NSS_BUFLEN_GROUP return NSS_BUFLEN_GROUP; #else RETURN_NEG_1; #endif case _SC_GETPW_R_SIZE_MAX: #ifdef NSS_BUFLEN_PASSWD return NSS_BUFLEN_PASSWD; #else RETURN_NEG_1; #endif case _SC_LOGIN_NAME_MAX: #ifdef _POSIX_LOGIN_NAME_MAX return _POSIX_LOGIN_NAME_MAX; #else RETURN_NEG_1; #endif case _SC_TTY_NAME_MAX: #ifdef _POSIX_TTY_NAME_MAX return _POSIX_TTY_NAME_MAX; #else RETURN_NEG_1; #endif case _SC_THREAD_DESTRUCTOR_ITERATIONS: #ifdef _POSIX_THREAD_DESTRUCTOR_ITERATIONS return _POSIX_THREAD_DESTRUCTOR_ITERATIONS; #else RETURN_NEG_1; #endif case _SC_THREAD_KEYS_MAX: #ifdef PTHREAD_KEYS_MAX return PTHREAD_KEYS_MAX; #else RETURN_NEG_1; #endif case _SC_THREAD_STACK_MIN: #ifdef PTHREAD_STACK_MIN return PTHREAD_STACK_MIN; #else RETURN_NEG_1; #endif case _SC_THREAD_THREADS_MAX: #ifdef PTHREAD_THREADS_MAX return PTHREAD_THREADS_MAX; #else RETURN_NEG_1; #endif case _SC_THREAD_ATTR_STACKADDR: #ifdef _POSIX_THREAD_ATTR_STACKADDR return 1; #else RETURN_NEG_1; #endif case _SC_THREAD_ATTR_STACKSIZE: #ifdef _POSIX_THREAD_ATTR_STACKSIZE return 1; #else RETURN_NEG_1; #endif case _SC_THREAD_PRIORITY_SCHEDULING: #ifdef _POSIX_THREAD_PRIORITY_SCHEDULING return 1; #else RETURN_NEG_1; #endif case _SC_THREAD_PRIO_INHERIT: #ifdef _POSIX_THREAD_PRIO_INHERIT return 1; #else RETURN_NEG_1; #endif case _SC_THREAD_PRIO_PROTECT: #ifdef _POSIX_THREAD_PRIO_PROTECT return 1; #else RETURN_NEG_1; #endif case _SC_THREAD_PROCESS_SHARED: #ifdef _POSIX_THREAD_PROCESS_SHARED return 1; #else RETURN_NEG_1; #endif case _SC_NPROCESSORS_CONF: #if 0 RETURN_FUNCTION(get_nprocs_conf()); #else RETURN_NEG_1; #endif case _SC_NPROCESSORS_ONLN: #if 0 RETURN_FUNCTION(get_nprocs()); #else RETURN_NEG_1; #endif case _SC_PHYS_PAGES: #if 0 RETURN_FUNCTION(get_phys_pages()); #else RETURN_NEG_1; #endif case _SC_AVPHYS_PAGES: #if 0 RETURN_FUNCTION(get_avphys_pages()); #else RETURN_NEG_1; #endif case _SC_ATEXIT_MAX: return __UCLIBC_MAX_ATEXIT; case _SC_PASS_MAX: /* We have no limit but since the return value might be used to allocate a buffer we restrict the value. */ return BUFSIZ; case _SC_XOPEN_VERSION: return _XOPEN_VERSION; case _SC_XOPEN_XCU_VERSION: return _XOPEN_XCU_VERSION; case _SC_XOPEN_UNIX: return _XOPEN_UNIX; case _SC_XOPEN_CRYPT: #ifdef _XOPEN_CRYPT return _XOPEN_CRYPT; #else RETURN_NEG_1; #endif case _SC_XOPEN_ENH_I18N: #ifdef _XOPEN_ENH_I18N return _XOPEN_ENH_I18N; #else RETURN_NEG_1; #endif case _SC_XOPEN_SHM: #ifdef _XOPEN_SHM return _XOPEN_SHM; #else RETURN_NEG_1; #endif case _SC_XOPEN_XPG2: #ifdef _XOPEN_XPG2 return _XOPEN_XPG2; #else RETURN_NEG_1; #endif case _SC_XOPEN_XPG3: #ifdef _XOPEN_XPG3 return _XOPEN_XPG3; #else RETURN_NEG_1; #endif case _SC_XOPEN_XPG4: #ifdef _XOPEN_XPG4 return _XOPEN_XPG4; #else RETURN_NEG_1; #endif case _SC_CHAR_BIT: return CHAR_BIT; case _SC_CHAR_MAX: return CHAR_MAX; case _SC_CHAR_MIN: return CHAR_MIN; case _SC_INT_MAX: return INT_MAX; case _SC_INT_MIN: return INT_MIN; case _SC_LONG_BIT: return sizeof (long int) * CHAR_BIT; case _SC_WORD_BIT: return sizeof (int) * CHAR_BIT; case _SC_MB_LEN_MAX: return MB_LEN_MAX; case _SC_NZERO: return NZERO; case _SC_SSIZE_MAX: return _POSIX_SSIZE_MAX; case _SC_SCHAR_MAX: return SCHAR_MAX; case _SC_SCHAR_MIN: return SCHAR_MIN; case _SC_SHRT_MAX: return SHRT_MAX; case _SC_SHRT_MIN: return SHRT_MIN; case _SC_UCHAR_MAX: return UCHAR_MAX; case _SC_UINT_MAX: return UINT_MAX; case _SC_ULONG_MAX: return ULONG_MAX; case _SC_USHRT_MAX: return USHRT_MAX; case _SC_NL_ARGMAX: #ifdef NL_ARGMAX return NL_ARGMAX; #else RETURN_NEG_1; #endif case _SC_NL_LANGMAX: #ifdef NL_LANGMAX return NL_LANGMAX; #else RETURN_NEG_1; #endif case _SC_NL_MSGMAX: #ifdef NL_MSGMAX return NL_MSGMAX; #else RETURN_NEG_1; #endif case _SC_NL_NMAX: #ifdef NL_NMAX return NL_NMAX; #else RETURN_NEG_1; #endif case _SC_NL_SETMAX: #ifdef NL_SETMAX return NL_SETMAX; #else RETURN_NEG_1; #endif case _SC_NL_TEXTMAX: #ifdef NL_TEXTMAX return NL_TEXTMAX; #else RETURN_NEG_1; #endif case _SC_XBS5_ILP32_OFF32: #ifdef _XBS5_ILP32_OFF32 return _XBS5_ILP32_OFF32; #else RETURN_NEG_1; #endif case _SC_XBS5_ILP32_OFFBIG: #ifdef _XBS5_ILP32_OFFBIG return _XBS5_ILP32_OFFBIG; #else RETURN_NEG_1; #endif case _SC_XBS5_LP64_OFF64: #ifdef _XBS5_LP64_OFF64 return _XBS5_LP64_OFF64; #else RETURN_NEG_1; #endif case _SC_XBS5_LPBIG_OFFBIG: #ifdef _XBS5_LPBIG_OFFBIG return _XBS5_LPBIG_OFFBIG; #else RETURN_NEG_1; #endif case _SC_XOPEN_LEGACY: return _XOPEN_LEGACY; case _SC_XOPEN_REALTIME: #ifdef _XOPEN_REALTIME return _XOPEN_REALTIME; #else RETURN_NEG_1; #endif case _SC_XOPEN_REALTIME_THREADS: #ifdef _XOPEN_REALTIME_THREADS return _XOPEN_REALTIME_THREADS; #else RETURN_NEG_1; #endif } } #endif /* _UCLIBC_GENERATE_SYSCONF_MAIN */ /***********************************************************************/ #ifdef _UCLIBC_GENERATE_SYSCONF_MAIN static long int ret_vals[_UCLIBC_SYSCONF_NUM_VALID_ARGS]; static const char *type_str[] = { "char", "short", "int", "long" }; static const char *type_fmt[] = { " %4ld", " %6ld", " %8ld", " %8ld" }; static const int type_mod[] = { 13, 9, 6, 6 }; static int find_or_add_in_table(int index, long int val, int *table, int *num_in_table, int add_flag) { int i; for (i=0 ; i<*num_in_table ; i++) { if (ret_vals[table[i]] == val) { return i; } } if (add_flag) { table[(*num_in_table)++] = index; return i; } else { return -1; } } int main(void) { long int r; int type_table[5][_UCLIBC_SYSCONF_NUM_VALID_ARGS]; int ret_type[_UCLIBC_SYSCONF_NUM_VALID_ARGS]; int num_type[5]; int i, j, k, code; for (i=0 ; i<5 ; i++) { num_type[i] = 0; } for (i=0; i<_UCLIBC_SYSCONF_NUM_VALID_ARGS ; i++) { __set_errno(0); r = ret_vals[i] = sysconf(i); switch(errno) { case EINVAL: /* we're missing a case! */ fprintf(stderr,"sysconf.c is broken! case %d missing!\n", i); return EXIT_FAILURE; case EISNAM: /* function */ find_or_add_in_table(i,r,type_table[4],num_type+4,1); ret_type[i] = 4; break; case ENOSYS: /* defaults to -1 */ /* why does this break for shared???? */ fprintf(stderr,"gen_sysconf advisory --" "case %d defaults to -1\n", i); /* fall through */ case 0: if ((r>=CHAR_MIN) && (r<=CHAR_MAX)) { ret_type[i] = 0; find_or_add_in_table(i,r,type_table[0],num_type+0,1); } else if ((r>=SHRT_MIN) && (r<=SHRT_MAX)) { ret_type[i] = 1; find_or_add_in_table(i,r,type_table[1],num_type+1,1); } else if ((r>=INT_MIN) && (r<=INT_MAX)) { ret_type[i] = 2; find_or_add_in_table(i,r,type_table[2],num_type+2,1); } else { ret_type[i] = 3; find_or_add_in_table(i,r,type_table[3],num_type+3,1); } break; default: fprintf(stderr,"sysconf.c is broken! errno = %d!\n", errno); break; } } printf("#include <errno.h>\n#include <unistd.h>\n#include <limits.h>\n\n"); printf("static const unsigned char index[%d] = {", _UCLIBC_SYSCONF_NUM_VALID_ARGS); for (i=0 ; i<_UCLIBC_SYSCONF_NUM_VALID_ARGS ; i++) { if (i) printf(","); if (i%15 == 0) printf("\n"); code = 0; for (j=0 ; j<4 ; j++) { k = find_or_add_in_table(i,ret_vals[i],type_table[j],num_type+j,0); if (k>=0) { code += k; break; } code += num_type[j]; } printf(" %3d", code); } printf("\n};\n\n"); for (j=0 ; j < 4 ; j++) { if (num_type[j]) { printf("static const %s %s_vals[%d] = {", type_str[j], type_str[j], num_type[j]); for (i = 0 ; i<num_type[j] ; i++) { if (i) printf(","); if (i%13 == 0) printf("\n"); if (ret_vals[type_table[j][i]] == INT_MIN) { printf("%12s","INT_MIN"); } else { printf(type_fmt[j], ret_vals[type_table[j][i]]); } } printf("\n};\n\n"); } } printf("long int sysconf(int name)\n{\n\tint i;\n\n" "\tif ((name < 0) || (name >= %d)) {\n" "\t\terrno=EINVAL;\n" "\t\treturn -1;\n" "\t}\n\n", _UCLIBC_SYSCONF_NUM_VALID_ARGS); printf("\ti = index[name];\n\n"); k = 0; for (i=0 ; i<4 ; i++) { if (num_type[i]) { if (k>0) { printf("\ti -= %d;\n", k); } printf("\tif (i < %d) {\n" "\t\treturn %s_vals[i];\n" "\t}\n\n", num_type[i], type_str[i]); k = num_type[i]; } } if (num_type[4]) { if (k>0) { printf("\ti -= %d;\n", k); } printf("\tswitch(i) {\n"); for (i = 0 ; i<num_type[4] ; i++) { printf("\t\tcase %d:\n" "\t\t\treturn %s;\n", i, (const char *)ret_vals[type_table[4][i]]); } printf("\t}\n\n"); } printf("\treturn -1;\n" "}\n"); return EXIT_SUCCESS; } /***********************************************************************/ #endif