Clean up internal libc logging.

We only need one logging API, and I prefer the one that does no
allocation and is thus safe to use in any context.

Also use O_CLOEXEC when opening the /dev/log files.

Move everything logging-related into one header file.

Change-Id: Ic1e3ea8e9b910dc29df351bff6c0aa4db26fbb58
diff --git a/libc/netbsd/resolv/res_send.c b/libc/netbsd/resolv/res_send.c
index f3ee539..c6c863b 100644
--- a/libc/netbsd/resolv/res_send.c
+++ b/libc/netbsd/resolv/res_send.c
@@ -119,7 +119,7 @@
 #  include <resolv_cache.h>
 #endif
 
-#include "logd.h"
+#include "libc_logging.h"
 
 #ifndef DE_CONST
 #define DE_CONST(c,v)   v = ((c) ? \
@@ -542,7 +542,7 @@
 				    ns);
 
 			if (DBG) {
-				__libc_android_log_print(ANDROID_LOG_DEBUG, "libc",
+				__libc_format_log(ANDROID_LOG_DEBUG, "libc",
 					"used send_vc %d\n", n);
 			}
 
@@ -554,15 +554,13 @@
 		} else {
 			/* Use datagrams. */
 			if (DBG) {
-				__libc_android_log_print(ANDROID_LOG_DEBUG, "libc",
-					"using send_dg\n");
+				__libc_format_log(ANDROID_LOG_DEBUG, "libc", "using send_dg\n");
 			}
 
 			n = send_dg(statp, buf, buflen, ans, anssiz, &terrno,
 				    ns, &v_circuit, &gotsomewhere);
 			if (DBG) {
-				__libc_android_log_print(ANDROID_LOG_DEBUG, "libc",
-					"used send_dg %d\n",n);
+				__libc_format_log(ANDROID_LOG_DEBUG, "libc", "used send_dg %d\n",n);
 			}
 
 			if (n < 0)
@@ -570,7 +568,7 @@
 			if (n == 0)
 				goto next_ns;
 			if (DBG) {
-				__libc_android_log_print(ANDROID_LOG_DEBUG, "libc",
+				__libc_format_log(ANDROID_LOG_DEBUG, "libc",
 					"time=%d, %d\n",time(NULL), time(NULL)%2);
 			}
 			if (v_circuit)
@@ -715,8 +713,7 @@
 		timeout = 1;
 	}
 	if (DBG) {
-		__libc_android_log_print(ANDROID_LOG_DEBUG, "libc",
-			"using timeout of %d sec\n", timeout);
+		__libc_format_log(ANDROID_LOG_DEBUG, "libc", "using timeout of %d sec\n", timeout);
 	}
 
 	return timeout;
@@ -738,7 +735,7 @@
 	void *tmp;
 
 	if (DBG) {
-		__libc_android_log_print(ANDROID_LOG_DEBUG, "libc", "using send_vc\n");
+		__libc_format_log(ANDROID_LOG_DEBUG, "libc", "using send_vc\n");
 	}
 
 	nsap = get_nsaddr(statp, (size_t)ns);
@@ -939,8 +936,7 @@
 		timeout = evConsTime((long)sec, 0L);
 		finish = evAddTime(now, timeout);
 		if (DBG) {
-			__libc_android_log_print(ANDROID_LOG_DEBUG, "libc",
-				"  %d send_vc\n", sock);
+			__libc_format_log(ANDROID_LOG_DEBUG, "libc", "  %d send_vc\n", sock);
 		}
 
 		res = retrying_select(sock, &rset, &wset, &finish);
@@ -951,7 +947,7 @@
 done:
 	fcntl(sock, F_SETFL, origflags);
 	if (DBG) {
-		__libc_android_log_print(ANDROID_LOG_DEBUG, "libc",
+		__libc_format_log(ANDROID_LOG_DEBUG, "libc",
 			"  %d connect_with_timeout returning %s\n", sock, res);
 	}
 	return res;
@@ -967,7 +963,7 @@
 
 retry:
 	if (DBG) {
-		__libc_android_log_print(ANDROID_LOG_DEBUG, "libc", "  %d retying_select\n", sock);
+		__libc_format_log(ANDROID_LOG_DEBUG, "libc", "  %d retying_select\n", sock);
 	}
 
 	now = evNowTime();
@@ -987,7 +983,7 @@
 	n = pselect(sock + 1, readset, writeset, NULL, &timeout, NULL);
 	if (n == 0) {
 		if (DBG) {
-			__libc_android_log_print(ANDROID_LOG_DEBUG, " libc",
+			__libc_format_log(ANDROID_LOG_DEBUG, " libc",
 				"  %d retrying_select timeout\n", sock);
 		}
 		errno = ETIMEDOUT;
@@ -997,7 +993,7 @@
 		if (errno == EINTR)
 			goto retry;
 		if (DBG) {
-			__libc_android_log_print(ANDROID_LOG_DEBUG, "libc",
+			__libc_format_log(ANDROID_LOG_DEBUG, "libc",
 				"  %d retrying_select got error %d\n",sock, n);
 		}
 		return n;
@@ -1007,7 +1003,7 @@
 		if (getsockopt(sock, SOL_SOCKET, SO_ERROR, &error, &len) < 0 || error) {
 			errno = error;
 			if (DBG) {
-				__libc_android_log_print(ANDROID_LOG_DEBUG, "libc",
+				__libc_format_log(ANDROID_LOG_DEBUG, "libc",
 					"  %d retrying_select dot error2 %d\n", sock, errno);
 			}
 
@@ -1015,7 +1011,7 @@
 		}
 	}
 	if (DBG) {
-		__libc_android_log_print(ANDROID_LOG_DEBUG, "libc",
+		__libc_format_log(ANDROID_LOG_DEBUG, "libc",
 			"  %d retrying_select returning %d for %d\n",sock, n);
 	}