X-Git-Url: http://nsz.repo.hu/git/?a=blobdiff_plain;f=src%2Fconf%2Fsysconf.c;h=d6691df8b0de371ad9b74db1d46860fb069651e6;hb=455f96857f91d14e193219ca00969354a981c09c;hp=28232a77e6b490ff9132d4f31ad02d5ec7ef57b2;hpb=b3b00d11e87926b553429d341b020a8a070e4ea1;p=musl

diff --git a/src/conf/sysconf.c b/src/conf/sysconf.c
index 28232a77..d6691df8 100644
--- a/src/conf/sysconf.c
+++ b/src/conf/sysconf.c
@@ -1,18 +1,22 @@
 #include <unistd.h>
 #include <limits.h>
 #include <errno.h>
+#include <sys/resource.h>
+#include "syscall.h"
 
 #define VER (-2)
 #define OFLOW (-3)
+#define CPUCNT (-4)
+#define RLIM(x) (-32768|(RLIMIT_ ## x))
 
 long sysconf(int name)
 {
 	static const short values[] = {
 		[_SC_ARG_MAX] = OFLOW,
-		[_SC_CHILD_MAX] = -1,
+		[_SC_CHILD_MAX] = RLIM(NPROC),
 		[_SC_CLK_TCK] = 100,
 		[_SC_NGROUPS_MAX] = 32,
-		[_SC_OPEN_MAX] = 1024,
+		[_SC_OPEN_MAX] = RLIM(NOFILE),
 		[_SC_STREAM_MAX] = -1,
 		[_SC_TZNAME_MAX] = TZNAME_MAX,
 		[_SC_JOB_CONTROL] = 1,
@@ -91,8 +95,8 @@ long sysconf(int name)
 		[_SC_THREAD_PRIO_INHERIT] = -1,
 		[_SC_THREAD_PRIO_PROTECT] = -1,
 		[_SC_THREAD_PROCESS_SHARED] = VER,
-		[_SC_NPROCESSORS_CONF] = -1,
-		[_SC_NPROCESSORS_ONLN] = -1,
+		[_SC_NPROCESSORS_CONF] = CPUCNT,
+		[_SC_NPROCESSORS_ONLN] = CPUCNT,
 		[_SC_PHYS_PAGES] = -1,
 		[_SC_AVPHYS_PAGES] = -1,
 		[_SC_ATEXIT_MAX] = -1,
@@ -217,6 +221,17 @@ long sysconf(int name)
 	} else if (values[name] == OFLOW) {
 		if (name == _SC_ARG_MAX) return ARG_MAX;
 		if (name == _SC_SEM_VALUE_MAX) return SEM_VALUE_MAX;
+	} else if (values[name] == CPUCNT) {
+		unsigned char set[128] = {1};
+		int i, cnt;
+		__syscall(SYS_sched_getaffinity, 0, sizeof set, set);
+		for (i=cnt=0; i<sizeof set; i++)
+			for (; set[i]; set[i]&=set[i]-1, cnt++);
+		return cnt;
+	} else if (values[name] < OFLOW) {
+		long lim[2];
+		__syscall(SYS_getrlimit, values[name]&16383, lim);
+		return lim[0] < 0 ? LONG_MAX : lim[0];
 	}
 	return values[name];
 }