How do I read the nicinfo's exit status?

QNX USERS QNX6 - OS
1

How do I read the nicinfo’s exit status?

[color=red]nicinfo : Display information about a network interface controller

Exit status:
0 Successful completion.
1 An error occurred.

follow is my code:

#include <stdlib.h>
#include <stdio.h>

int main(int argc, char *argv[]) {
int status;
printf(“Welcome to the Momentics IDE\n”);
status=system(“nicinfo /dev/io-net/en1”);
printf(“status=%d\n”,status);
return EXIT_SUCCESS;
}

2

WEXITSTATUS(status) should help

From the docu: Use the WEXITSTATUS() macro to determine the low-order 8 bits of the termination status of the process.
(Note in the docu: 255 is equal to -1 on most systems, -1 can also be the shell, the command should run in, could not be executed,
generally this means something went wrong, but does not imply it was the command failed^^)

3

If you want the exit code as returned by nicinfo you need to use spawn() because with system() you’ll get the exit core returned by the shell.

4

This WEXITSTATUS() is return system() 's status, not nicinfo’s.
I wish know the network is link up or link down?

5

qnx.com/developers/docs/6.3. … fig_t.html

Check the “flags” member, the “NIC_FLAG_LINK_DOWN” bit.

And then of cause, /usr/include/sys/dcmd-io_net.h, the DCMD_IO_NET_GET_CONFIG command.

6

system():

Returns:
If command is NULL, system() returns zero if the shell isn’t present, or a nonzero value if the shell is present.
If command isn’t NULL, system() returns the result of invoking a copy of the shell. If the shell couldn’t be loaded, system() returns -1; otherwise, it returns the status of the specified command. Use the WEXITSTATUS() macro to determine the low-order 8 bits of the termination status of the process.

They say it returns the status of the specified command, i may misunderstood that, but thats what it reads