fdlimit: improve fdlimit autoraising tests

License: MIT
Signed-off-by: Jeromy <why@ipfs.io>

cmd/ipfs/ulimit_unix.go

@@ -30,12 +30,15 @@ func checkAndSetUlimit() error {
 		return fmt.Errorf("error getting rlimit: %s", err)
 	}
 
+	var setting bool
 	if rLimit.Cur < ipfsFileDescNum {
 		if rLimit.Max < ipfsFileDescNum {
+			log.Error("adjusting max")
 			rLimit.Max = ipfsFileDescNum
 		}
-		fmt.Printf("Adjusting current ulimit to %d.\n", ipfsFileDescNum)
+		fmt.Printf("Adjusting current ulimit to %d...\n", ipfsFileDescNum)
 		rLimit.Cur = ipfsFileDescNum
+		setting = true
 	}
 
 	err = syscall.Setrlimit(syscall.RLIMIT_NOFILE, &rLimit)
@@ -43,5 +46,9 @@ func checkAndSetUlimit() error {
 		return fmt.Errorf("error setting ulimit: %s", err)
 	}
 
+	if setting {
+		fmt.Printf("Successfully raised file descriptor limit to %d.\n", ipfsFileDescNum)
+	}
+
 	return nil
 }

test/sharness/t0060-daemon.sh

@@ -121,14 +121,30 @@ test_expect_success "daemon with pipe eventually becomes live" '
   test_fsh cat stdin_daemon_out || test_fsh cat stdin_daemon_err || test_fsh cat stdin_poll_apiout || test_fsh cat stdin_poll_apierr
 '
 
-ulimit -n 512
+ulimit -S -n 512
 TEST_ULIMIT_PRESET=1
 test_launch_ipfs_daemon
 
 test_expect_success "daemon raised its fd limit" '
-	grep "ulimit" actual_daemon > /dev/null
+	grep "raised file descriptor limit to 1024." actual_daemon > /dev/null
 '
 
+get_col_four() {
+	awk '{ print $4 }' $1
+}
+
+if [ `uname` == "Linux" ]; then
+	test_expect_success "get fd limit through /proc" '
+		cat /proc/$IPFS_PID/limits > limits &&
+		grep "Max open files" limits > fd_limits_line &&
+		limit=$(get_col_four fd_limits_line)
+	'
+
+	test_expect_success "limit from system looks good" '
+		test "$limit" -eq 1024
+	'
+fi
+
 test_kill_ipfs_daemon
 
 test_done