Remove the SIGSYS handler and wrapper around the __getcwd() syscall.

It was kinda silly since the sigaction() syscall that it used to setup
the handler is more recent than __getcwd(), therefore it was useless
as the wrapper would have died before even getting as far as __getcwd(2).

Reminded by:	bde

1 files changed, 10 insertions, 39 deletions

diff --git a/lib/libc/gen/getcwd.c b/lib/libc/gen/getcwd.c
index 9b1ccf3..e2ea820 100644
--- a/lib/libc/gen/getcwd.c
+++ b/lib/libc/gen/getcwd.c
@@ -47,14 +47,11 @@ static char sccsid[] = "@(#)getcwd.c	8.5 (Berkeley) 2/7/95";
 #include <stdlib.h>
 #include <string.h>
 #include <unistd.h>
-#include <signal.h>
 
 #define	ISDOT(dp) \
 	(dp->d_name[0] == '.' && (dp->d_name[1] == '\0' || \
 	    (dp->d_name[1] == '.' && dp->d_name[2] == '\0')))
 
-static int have__getcwd = 1;	/* 0 = no, 1 = perhaps, 2 = yes */
-
 char *
 getcwd(pt, size)
 	char *pt;
@@ -94,44 +91,18 @@ getcwd(pt, size)
 			return (NULL);
 		ept = pt + ptsize;
 	}
-#if	defined(__NETBSD_SYSCALLS)
-	have__getcwd = 0;
-#else
-	if (have__getcwd) {
-		struct sigaction sa, osa;
-		int sigsys_installed = 0;
-		int ret;
-
-		if (have__getcwd == 1) {	/* unsure? */
-			sigemptyset(&sa.sa_mask);
-			sa.sa_flags = 0;
-			sa.sa_handler = SIG_IGN;
-			if (sigaction(SIGSYS, &sa, &osa) >= 0)
-				sigsys_installed = 1;
-		}
-		ret = __getcwd(pt, ept - pt);
-		if (sigsys_installed == 1) {
-			int oerrno = errno;
-			sigaction(SIGSYS, &osa, NULL);
-			errno = oerrno;
-		}
-		/* XXX a bogus syscall seems to return EINVAL(!) */
-		if (ret < 0 && (errno == ENOSYS || errno == EINVAL))
-			have__getcwd = 0;
-		else if (have__getcwd == 1)
-			have__getcwd = 2;	/* yep, remember we have it */
-		if (ret == 0) {
-			if (*pt != '/') {
-				bpt = pt;
-				ept = pt + strlen(pt) - 1;
-				while (bpt < ept) {
-					c = *bpt;
-					*bpt++ = *ept;
-					*ept-- = c;
-				}
+#if	!defined(__NETBSD_SYSCALLS)
+	if (__getcwd(pt, ept - pt) == 0) {
+		if (*pt != '/') {
+			bpt = pt;
+			ept = pt + strlen(pt) - 1;
+			while (bpt < ept) {
+				c = *bpt;
+				*bpt++ = *ept;
+				*ept-- = c;
 			}
-			return (pt);
 		}
+		return (pt);
 	}
 #endif
 	bpt = ept - 1;