I've been trying use the mount(2) function to programmatically mount an NFS share on my application, although I seem to be having issues with the function signature and the parameters that I'm supposed to be passing. According to the man pages this is the function's signature: int mount(const char *type, const char *dir, int flags, void *data); As the documentation is vague on the value of type, I've assumed that it was the network location, in the form of server.name:/some/location. So I've written the following test code: #include <stdlib.h> #include <stdio.h> #include <string.h> #include <errno.h> #include <sys/param.h> #include <sys/mount.h> int main(int argc, char **argv) { const char *type = "nfsserver.lan:/some/path"; const char *mntp = "/Users/localuser/tmpmount"; int ret = mount(type, mntp, 0, NULL); printf("ret = %d\n", ret); printf("errno = %d (%s)\n", errno, strerror(errno)); return 0; } Upon running this program on my Mac Pro running macOS 12.7.4 I got the following output: ret = -1 errno = 63 (File name too long) The NFS share location string I'm actually using is exactly 46 characters long and I am able to mount the share using the mount(8) command. I'm also able to use the unmount(2) function for testing after I've used the mount(8) command. What am I missing and how can I fix this issue? I think I'm probably passing the parameters in the wrong way, but sadly the documentation is quite vague.