OS 5 client.c

#include <stdbool.h>
#include <stdio.h>
#include <string.h>
#include <sys/iomsg.h>
#include <sys/neutrino.h>
#include <unistd.h>
#include "httpd_pid.h"

char input[65535], response[65535];

int main(void) {
    FILE* f = fopen(HTTPD_PID, "r");
    if (!f) {
        fputs("Cannot open \"" HTTPD_PID "\"\n", stderr);
        return 1;
    }
    int nodeDescriptor, serverId, channelId;
    bool ok = fscanf(f, "%d/%d/%d", &nodeDescriptor, &serverId, &channelId) == 3;
    fclose(f);
    if (!ok) {
        fputs("Invalid file format\n", stderr);
        return 1;
    }
    int connectionId = ConnectAttach(nodeDescriptor, serverId, channelId, 0, 0);
    if (connectionId == -1) {
        fputs("Server is not found\n", stderr);
        return 1;
    }
    while (fputs(">>> ", stdout) >= 0 && fgets(input, sizeof input / sizeof(char), stdin)) {
        int len = strlen(input);
        input[len - 1] = '\0';
        if (!strcmp(input, "exit"))
            break;
        if (MsgSend(connectionId, input, len, response, sizeof response) == -1) {
            fputs("Cannot send a message\n", stderr);
            return 1;
        }
        puts(response);
    }
    return 0;
}