Packages

vintage_net

0.2.2
0.13.12 0.13.11 0.13.10 0.13.9 0.13.8 0.13.7 0.13.6 0.13.5 0.13.4 0.13.3 0.13.2 0.13.1 0.13.0 0.12.2 0.12.1 0.12.0 0.11.5 0.11.4 0.11.3 0.11.2 0.11.1 0.11.0 0.10.5 0.10.4 0.10.3 0.10.2 0.10.1 0.10.0 0.9.3 0.9.2 0.9.1 0.9.0 0.8.0 0.7.9 0.7.8 0.7.7 0.7.6 0.7.5 0.7.4 0.7.3 0.7.2 0.7.1 0.7.0 0.6.6 0.6.5 0.6.4 0.6.3 0.6.2 0.6.1 0.6.0 0.5.1 0.5.0 0.4.1 0.4.0 0.3.1 0.3.0 0.2.4 0.2.3 0.2.2 0.2.1 0.2.0 0.1.0

Network configuration and management for Nerves

HexDocs

Current section

Files

Jump to
Readme
62 Versions
3 Dependencies
16 Dependants
Files
Activity
vintage_net src to_elixir.c
Raw

src/to_elixir.c 

#include <err.h>

#include <stdlib.h>

#include <string.h>

#include <sys/socket.h>

#include <sys/un.h>

#include <unistd.h>



#include <ei.h>



#define SOCKET_PATH "/tmp/vintage_net/comms"



static void encode_string(ei_x_buff *buff, const char *str)

{

    // Encode strings as binaries so that we get Elixir strings

    // NOTE: the strings that we encounter here are expected to be ASCII to

    //       my knowledge

    ei_x_encode_binary(buff, str, strlen(str));

}



int main(int argc, char *argv[])

{

    if (argc != 2)

        errx(EXIT_FAILURE, "Expecting a message");



    int fd = socket(AF_UNIX, SOCK_DGRAM, 0);

    if (fd < 0)

        err(EXIT_FAILURE, "socket");



    struct sockaddr_un addr;

    memset(&addr, 0, sizeof(addr));

    addr.sun_family = AF_UNIX;

    strncpy(addr.sun_path, SOCKET_PATH, sizeof(addr.sun_path) - 1);



    if (connect(fd, (struct sockaddr *)&addr, sizeof(addr)) == -1)

        err(EXIT_FAILURE, "connect");



    ei_x_buff buff;

    if (ei_x_new_with_version(&buff) < 0)

        err(EXIT_FAILURE, "ei_x_new_with_version");



    ei_x_encode_tuple_header(&buff, 2);

    ei_x_encode_atom(&buff, "to_elixir");

    encode_string(&buff, argv[1]);



    ssize_t rc = write(fd, buff.buff, buff.index);

    if (rc < 0)

        err(EXIT_FAILURE, "write");



    if (rc != buff.index)

        errx(EXIT_FAILURE, "write wasn't able to send %d chars all at once!", buff.index);



    close(fd);

    return 0;

}