* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
- * 3. All advertising materials mentioning features or use of this software
- * must display the following acknowledgement:
- * This product includes software developed by the University of
- * California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
static char sccsid[] = "@(#)sysconf.c 8.2 (Berkeley) 3/20/94";
#endif /* LIBC_SCCS and not lint */
#include <sys/cdefs.h>
-__FBSDID("$FreeBSD: src/lib/libc/gen/sysconf.c,v 1.20 2002/11/17 08:54:29 dougb Exp $");
+__FBSDID("$FreeBSD: lib/libc/gen/sysconf.c r168718 $");
#include <sys/param.h>
#include <sys/time.h>
#include <sys/sysctl.h>
#include <sys/resource.h>
#include <sys/socket.h>
+#include <sys/aio.h>
+#include <sys/semaphore.h>
#include <errno.h>
#include <limits.h>
#include <time.h>
#include <unistd.h>
-#include "../stdlib/atexit.h"
-#include "../stdtime/tzfile.h"
+#include "../../stdlib/FreeBSD/atexit.h"
+#include "../../stdtime/FreeBSD/tzfile.h"
#define _PATH_ZONEINFO TZDIR /* from tzfile.h */
int name;
{
struct rlimit rl;
+ quad_t qdvalue; /* for kern.sysv.shmmin */
size_t len;
- int mib[2], sverrno, value;
- long defaultresult;
+ int mib[3], sverrno, value;
+ long lvalue, defaultresult;
const char *path;
- len = sizeof(value);
defaultresult = -1;
switch (name) {
case _SC_STREAM_MAX: /* assume fds run out before memory does */
if (getrlimit(RLIMIT_NOFILE, &rl) != 0)
return (-1);
- if (rl.rlim_cur == RLIM_INFINITY)
+#if __LP64__
+ /*
+ * In 64 bit world, sysconf is able to correctly represent
+ * rlim_t values (8 bytes).
+ */
+ if (rl.rlim_cur > RLIM_INFINITY)
return (-1);
if (rl.rlim_cur > LONG_MAX) {
errno = EOVERFLOW;
return (-1);
}
- return ((long)rl.rlim_cur);
+ lvalue = rl.rlim_cur;
+#else
+ /*
+ * In 32 bit world (watches), sysconf falls back to the
+ * old behavior: use (int) OPEN_MAX as max limit. Ideally
+ * we would use maxfilesperproc as max limit, which is a
+ * system value adjusted by the kernel based on available
+ * RAM size. This value defaults to OPEN_MAX for systems
+ * with less than 8G of RAM. So we use OPEN_MAX (defined
+ * in sys/syslimits.h) as max limit here in case
+ * applications with strict sandbox rules prevent libc
+ * from reading maxfilesperproc via sysctl.
+ */
+ if (rl.rlim_cur > OPEN_MAX)
+ lvalue = OPEN_MAX;
+ else
+ lvalue = (long)rl.rlim_cur;
+#endif
+ return lvalue;
case _SC_JOB_CONTROL:
return (_POSIX_JOB_CONTROL);
case _SC_SAVED_IDS:
do_NAME_MAX:
sverrno = errno;
errno = 0;
- value = pathconf(path, _PC_NAME_MAX);
- if (value == -1 && errno != 0)
+ lvalue = pathconf(path, _PC_NAME_MAX);
+ if (lvalue == -1 && errno != 0)
return (-1);
errno = sverrno;
- return (value);
+ return (lvalue);
case _SC_ASYNCHRONOUS_IO:
#if _POSIX_ASYNCHRONOUS_IO == 0
return (_POSIX_TIMERS);
#endif
case _SC_AIO_LISTIO_MAX:
+#if defined(CTL_P1003_1B) && defined(CTL_P1003_1B_AIO_LISTIO_MAX)
mib[0] = CTL_P1003_1B;
mib[1] = CTL_P1003_1B_AIO_LISTIO_MAX;
+#else
+ mib[0] = CTL_KERN;;
+ mib[1] = KERN_AIOMAX;
+#endif
break;
case _SC_AIO_MAX:
+#if defined(CTL_P1003_1B) && defined(CTL_P1003_1B_AIO_MAX)
mib[0] = CTL_P1003_1B;
mib[1] = CTL_P1003_1B_AIO_MAX;
+#else
+ mib[0] = CTL_KERN;;
+ mib[1] = KERN_AIOMAX;
+#endif
break;
case _SC_AIO_PRIO_DELTA_MAX:
+#if defined(CTL_P1003_1B) && defined(CTL_P1003_1B_AIO_PRIO_DELTA_MAX)
mib[0] = CTL_P1003_1B;
mib[1] = CTL_P1003_1B_AIO_PRIO_DELTA_MAX;
break;
+#else
+ return (-1);
+#endif
case _SC_DELAYTIMER_MAX:
+#if defined(CTL_P1003_1B) && defined(CTL_P1003_1B_DELAYTIMER_MAX)
mib[0] = CTL_P1003_1B;
mib[1] = CTL_P1003_1B_DELAYTIMER_MAX;
goto yesno;
+#else
+ return (-1);
+#endif
case _SC_MQ_OPEN_MAX:
+#if defined(CTL_P1003_1B) && defined(CTL_P1003_1B_MQ_OPEN_MAX)
mib[0] = CTL_P1003_1B;
mib[1] = CTL_P1003_1B_MQ_OPEN_MAX;
goto yesno;
+#else
+ return (-1);
+#endif
case _SC_PAGESIZE:
defaultresult = getpagesize();
+#if defined(CTL_P1003_1B) && defined(CTL_P1003_1B_PAGESIZE)
mib[0] = CTL_P1003_1B;
mib[1] = CTL_P1003_1B_PAGESIZE;
goto yesno;
+#else
+ return defaultresult;
+#endif
case _SC_RTSIG_MAX:
+#if defined(CTL_P1003_1B) && defined(CTL_P1003_1B_RTSIG_MAX)
mib[0] = CTL_P1003_1B;
mib[1] = CTL_P1003_1B_RTSIG_MAX;
goto yesno;
+#else
+ return (-1);
+#endif
case _SC_SEM_NSEMS_MAX:
+#if defined(CTL_P1003_1B) && defined(CTL_P1003_1B_RTSIG_MAX)
mib[0] = CTL_P1003_1B;
mib[1] = CTL_P1003_1B_SEM_NSEMS_MAX;
goto yesno;
+#else
+ len = sizeof(value);
+ return (sysctlbyname("kern.sysv.semmns", &value, &len, NULL, 0) == -1 ? -1 : value);
+#endif
+
case _SC_SEM_VALUE_MAX:
+#if SEM_VALUE_MAX == 0
mib[0] = CTL_P1003_1B;
mib[1] = CTL_P1003_1B_SEM_VALUE_MAX;
goto yesno;
+#else
+ return (SEM_VALUE_MAX);
+#endif
case _SC_SIGQUEUE_MAX:
+#if defined(CTL_P1003_1B) && defined(CTL_P1003_1B_SIGQUEUE_MAX)
mib[0] = CTL_P1003_1B;
mib[1] = CTL_P1003_1B_SIGQUEUE_MAX;
goto yesno;
+#else
+ return (-1);
+#endif
case _SC_TIMER_MAX:
+#if defined(CTL_P1003_1B) && defined(CTL_P1003_1B_TIMER_MAX)
mib[0] = CTL_P1003_1B;
mib[1] = CTL_P1003_1B_TIMER_MAX;
+#else
+ return (-1);
+#endif
-yesno: if (sysctl(mib, 2, &value, &len, NULL, 0) == -1)
+yesno:
+ len = sizeof(value);
+ if (sysctl(mib, 2, &value, &len, NULL, 0) == -1)
return (-1);
if (value == 0)
return (defaultresult);
- return (value);
+ return ((long)value);
case _SC_2_PBS:
case _SC_2_PBS_ACCOUNTING:
#else
return (_POSIX_CPUTIME);
#endif
-#ifdef notdef
case _SC_FILE_LOCKING:
- /*
- * XXX - The standard doesn't tell us how to define
- * _POSIX_FILE_LOCKING, so we can't answer this one.
- */
-#endif
-#if _POSIX_THREAD_SAFE_FUNCTIONS > -1
case _SC_GETGR_R_SIZE_MAX:
+/* return sizeof(group) + group_name_max + group_passwd_max + max_group_member*(MAXLOGNAME+1); */
+ return 4096; /* INT_MAX is too big for Perl */
case _SC_GETPW_R_SIZE_MAX:
-#error "somebody needs to implement this"
-#endif
+ return 4096;
case _SC_HOST_NAME_MAX:
return (MAXHOSTNAMELEN - 1); /* does not include \0 */
case _SC_LOGIN_NAME_MAX:
#else
return (_POSIX_MONOTONIC_CLOCK);
#endif
-#if _POSIX_MESSAGE_PASSING > -1
case _SC_MQ_PRIO_MAX:
- return (MQ_PRIO_MAX);
-#endif
+ return (-1);
case _SC_READER_WRITER_LOCKS:
return (_POSIX_READER_WRITER_LOCKS);
case _SC_REGEXP:
return (_POSIX_THREAD_PROCESS_SHARED);
case _SC_THREAD_SAFE_FUNCTIONS:
return (_POSIX_THREAD_SAFE_FUNCTIONS);
+ case _SC_THREAD_SPORADIC_SERVER:
+ return (_POSIX_THREAD_SPORADIC_SERVER);
case _SC_THREAD_STACK_MIN:
return (PTHREAD_STACK_MIN);
case _SC_THREAD_THREADS_MAX:
+#ifdef PTHREAD_THREADS_MAX
return (PTHREAD_THREADS_MAX); /* XXX wrong type! */
+#else
+ return (-1);
+#endif
case _SC_TIMEOUTS:
return (_POSIX_TIMEOUTS);
case _SC_THREADS:
#else
return (_POSIX_TRACE);
#endif
-#if _POSIX_TRACE > -1
case _SC_TRACE_EVENT_FILTER:
return (_POSIX_TRACE_EVENT_FILTER);
case _SC_TRACE_INHERIT:
return (_POSIX_TRACE_INHERIT);
case _SC_TRACE_LOG:
return (_POSIX_TRACE_LOG);
-#endif
case _SC_TTY_NAME_MAX:
- path = _PATH_DEV;
+ path = "/"; // should be _PATH_DEV (PR-3624562)
goto do_NAME_MAX;
case _SC_TYPED_MEMORY_OBJECTS:
#if _POSIX_TYPED_MEMORY_OBJECTS == 0
return (_V6_LPBIG_OFFBIG);
#endif
case _SC_ATEXIT_MAX:
- return (ATEXIT_SIZE);
+ return (INT_MAX); /* unlimited */
case _SC_IOV_MAX:
+#ifdef KERN_IOV_MAX
mib[0] = CTL_KERN;
mib[1] = KERN_IOV_MAX;
break;
+#else
+ return (IOV_MAX);
+#endif
case _SC_XOPEN_CRYPT:
return (_XOPEN_CRYPT);
case _SC_XOPEN_ENH_I18N:
#endif
case _SC_XOPEN_SHM:
sverrno = errno;
- if (sysctlbyname("kern.ipc.shmmin", &value, &len, NULL,
+ len = sizeof(qdvalue);
+ if (sysctlbyname("kern.sysv.shmmin", &qdvalue, &len, NULL,
0) == -1) {
errno = sverrno;
return (-1);
return (_POSIX_IPV6);
#endif
+#ifdef _SC_NPROCESSORS_CONF
case _SC_NPROCESSORS_CONF:
+#endif
+#ifdef _SC_NPROCESSORS_ONLN
case _SC_NPROCESSORS_ONLN:
+#endif
+#if defined(_SC_NPROCESSORS_CONF) || defined(_SC_NPROCESSORS_ONLN)
mib[0] = CTL_HW;
mib[1] = HW_NCPU;
break;
+#endif
+ case _SC_XBS5_ILP32_OFF32:
+ return (_XBS5_ILP32_OFF32);
+ case _SC_XBS5_ILP32_OFFBIG:
+ return (_XBS5_ILP32_OFFBIG);
+ case _SC_XBS5_LP64_OFF64:
+ return (_XBS5_LP64_OFF64);
+ case _SC_XBS5_LPBIG_OFFBIG:
+ return (_XBS5_LPBIG_OFFBIG);
+ case _SC_SS_REPL_MAX:
+ return (_POSIX_SS_REPL_MAX);
+ case _SC_TRACE_EVENT_NAME_MAX:
+ return (_POSIX_TRACE_EVENT_NAME_MAX);
+ case _SC_TRACE_NAME_MAX:
+ return (_POSIX_TRACE_NAME_MAX);
+ case _SC_TRACE_SYS_MAX:
+ return (_POSIX_TRACE_SYS_MAX);
+ case _SC_TRACE_USER_EVENT_MAX:
+ return (_POSIX_TRACE_USER_EVENT_MAX);
+ case _SC_PASS_MAX:
+ return (PASS_MAX);
+
+#ifdef _SC_PHYS_PAGES
+ case _SC_PHYS_PAGES:
+#ifdef __APPLE__
+ {
+ long memsize;
+ long pagesize;
+
+ len = sizeof(memsize);
+ if (sysctlbyname("hw.memsize", &memsize, &len, NULL, 0) == -1)
+ return (-1);
+
+ len = sizeof(pagesize);
+ if (sysctlbyname("hw.pagesize", &pagesize, &len, NULL, 0) == -1)
+ return (-1);
+
+ return (memsize / pagesize);
+ }
+#else
+ len = sizeof(lvalue);
+ if (sysctlbyname("hw.availpages", &lvalue, &len, NULL, 0) == -1)
+ return (-1);
+ return (lvalue);
+#endif
+#endif
default:
errno = EINVAL;
return (-1);
}
- return (sysctl(mib, 2, &value, &len, NULL, 0) == -1 ? -1 : value);
+ len = sizeof(value);
+ if (sysctl(mib, 2, &value, &len, NULL, 0) == -1)
+ value = -1;
+ return ((long)value);
}
projects / apple / libc.git / blobdiff