X-Git-Url: http://nsz.repo.hu/git/?a=blobdiff_plain;ds=sidebyside;f=src%2Fselect%2Fselect.c;h=8a78688403047d0a1ce8ff3566530ea3722615f9;hb=c499c1084eaccd83e4b6e60883a5d92df0202c5e;hp=696cb2880efcf1b2c0607f16cb424b203d6d5055;hpb=feee98903cd8119d9a3db62589246a940f44a9f5;p=musl

diff --git a/src/select/select.c b/src/select/select.c
index 696cb288..8a786884 100644
--- a/src/select/select.c
+++ b/src/select/select.c
@@ -1,8 +1,44 @@
 #include <sys/select.h>
+#include <signal.h>
+#include <stdint.h>
+#include <errno.h>
 #include "syscall.h"
-#include "libc.h"
 
-int select(int n, fd_set *rfds, fd_set *wfds, fd_set *efds, struct timeval *tv)
+#define IS32BIT(x) !((x)+0x80000000ULL>>32)
+#define CLAMP(x) (int)(IS32BIT(x) ? (x) : 0x7fffffffU+((0ULL+(x))>>63))
+
+int select(int n, fd_set *restrict rfds, fd_set *restrict wfds, fd_set *restrict efds, struct timeval *restrict tv)
 {
-	return syscall_cp(SYS_select, n, rfds, wfds, efds, tv);
+	time_t s = tv ? tv->tv_sec : 0;
+	suseconds_t us = tv ? tv->tv_usec : 0;
+	long ns;
+	const time_t max_time = (1ULL<<8*sizeof(time_t)-1)-1;
+
+	if (s<0 || us<0) return __syscall_ret(-EINVAL);
+	if (us/1000000 > max_time - s) {
+		s = max_time;
+		us = 999999;
+		ns = 999999999;
+	} else {
+		s += us/1000000;
+		us %= 1000000;
+		ns = us*1000;
+	}
+
+#ifdef SYS_pselect6_time64
+	int r = -ENOSYS;
+	if (SYS_pselect6 == SYS_pselect6_time64 || !IS32BIT(s))
+		r = __syscall_cp(SYS_pselect6_time64, n, rfds, wfds, efds,
+			tv ? ((long long[]){s, ns}) : 0,
+			((syscall_arg_t[]){ 0, _NSIG/8 }));
+	if (SYS_pselect6 == SYS_pselect6_time64 || r!=-ENOSYS)
+		return __syscall_ret(r);
+#endif
+#ifdef SYS_select
+	return syscall_cp(SYS_select, n, rfds, wfds, efds,
+		tv ? ((long[]){s, us}) : 0);
+#else
+	return syscall_cp(SYS_pselect6, n, rfds, wfds, efds,
+		tv ? ((long[]){s, ns}) : 0, ((syscall_arg_t[]){ 0, _NSIG/8 }));
+#endif
 }