Add some more system utilities, including sysconf and the ability to …

…get corecount. Corresponds to llvm-project-deluge/1a82ad4ef4f3

src/conf/sysconf.c

@@ -7,6 +7,7 @@
 #include <sys/auxv.h>
 #include "syscall.h"
 #include "libc.h"
+#include <stdfil.h>
 
 #define JT(x) (-256|(x))
 #define VER JT(1)
@@ -27,6 +28,10 @@
 
 long sysconf(int name)
 {
+    errno = 0;
+    long zsys_result = zsys_sysconf_override(name);
+    if (errno != ENOSYS)
+        return zsys_result;
 	static const short values[] = {
 		[_SC_ARG_MAX] = JT_ARG_MAX,
 		[_SC_CHILD_MAX] = RLIM(NPROC),

src/sched/affinity.c

@@ -3,35 +3,41 @@
 #include <string.h>
 #include "pthread_impl.h"
 #include "syscall.h"
+#include <stdfil.h>
 
 int sched_setaffinity(pid_t tid, size_t size, const cpu_set_t *set)
 {
-	return syscall(SYS_sched_setaffinity, tid, size, set);
+    errno = ENOSYS;
+    return -1;
 }
 
 int pthread_setaffinity_np(pthread_t td, size_t size, const cpu_set_t *set)
 {
-    zerror("pthread_setaffinity_np not implemented");
-    return 0;
-    //return -__syscall(SYS_sched_setaffinity, td->tid, size, set);
+    return ENOSYS;
 }
 
-static int do_getaffinity(pid_t tid, size_t size, cpu_set_t *set)
+static int do_getaffinity(size_t size, cpu_set_t *set)
 {
-	long ret = __syscall(SYS_sched_getaffinity, tid, size, set);
-	if (ret < 0) return ret;
-	if (ret < size) memset((char *)set+ret, 0, size-ret);
-	return 0;
+    int numcores = zsys_numcores();
+    if (numcores < 0)
+        return -1;
+    cpu_set_t my_set;
+    memset(&my_set, 0, sizeof(my_set));
+    int index;
+    for (index = numcores; index--;)
+        CPU_SET(index, &my_set);
+    memcpy(set, &my_set, size);
+    return 0;
 }
 
 int sched_getaffinity(pid_t tid, size_t size, cpu_set_t *set)
 {
-	return __syscall_ret(do_getaffinity(tid, size, set));
+    return do_getaffinity(size, set);
 }
 
 int pthread_getaffinity_np(pthread_t td, size_t size, cpu_set_t *set)
 {
-    zerror("pthread_getaffinity_np not implemented");
+    if (do_getaffinity(size, set) < 0)
+        return errno;
     return 0;
-    //return -do_getaffinity(td->tid, size, set);
 }