diff --git a/pigpio.c b/pigpio.c
index eb04fcd..42ac4d5 100644
--- a/pigpio.c
+++ b/pigpio.c
@@ -1572,6 +1572,9 @@ int myPathBad(char *name)
    in_part = 0;
    last_char_dot = 0;
 
+   if (strstr(name, "..")) return 1;
+   if (strstr(name, "\\.")) return 1;
+
    len = strlen(name);
 
    for (i=0; i<len; i++)
diff --git a/pigpiod_if.c b/pigpiod_if.c
index 7802e57..c62b3e8 100644
--- a/pigpiod_if.c
+++ b/pigpiod_if.c
@@ -1064,7 +1064,7 @@ int i2c_process_call(unsigned handle, unsigned reg, uint32_t val)
    ext[0].ptr = &val;
 
    return pigpio_command_ext
-      (gPigCommand, PI_CMD_I2CPK, handle, reg, 4, 1, ext, 1);
+      (gPigCommand, PI_CMD_I2CPC, handle, reg, 4, 1, ext, 1);
 }
 
 int i2c_write_block_data(
diff --git a/pigpiod_if2.c b/pigpiod_if2.c
index 7af8313..ab2ef10 100644
--- a/pigpiod_if2.c
+++ b/pigpiod_if2.c
@@ -1288,7 +1288,7 @@ int i2c_process_call(int pi, unsigned handle, unsigned reg, uint32_t val)
    ext[0].ptr = &val;
 
    return pigpio_command_ext
-      (pi, PI_CMD_I2CPK, handle, reg, 4, 1, ext, 1);
+      (pi, PI_CMD_I2CPC, handle, reg, 4, 1, ext, 1);
 }
 
 int i2c_write_block_data(