src/tomc/main.c

   1 /* Copyright (C) 2018 Thomas Balzer */
   2
   3 /* This file is part of tomd. */
   4
   5 /* tomd is free software: you can redistribute it and/or modify */
   6 /* it under the terms of the GNU General Public License as published by */
   7 /* the Free Software Foundation, either version 3 of the License, or */
   8 /* (at your option) any later version. */
   9
  10 /* tomd is distributed in the hope that it will be useful, */
  11 /* but WITHOUT ANY WARRANTY; without even the implied warranty of */
  12 /* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the */
  13 /* GNU General Public License for more details. */
  14
  15 /* You should have received a copy of the GNU General Public License */
  16 /* along with tomd.  If not, see <http://www.gnu.org/licenses/>. */
  17
  18 #include <stdlib.h>
  19 #include <stdio.h>
  20 #include <sys/un.h>
  21 #include <sys/socket.h>
  22 #include <unistd.h>
  23
  24 #include "../../include/macros.h"
  25
  26 static int sfd;
  27
  28 static void header(void)
  29 {
  30   tomc_p("Tom's Client, Copyright (C) 2018 Thomas Balzer");
  31   tomc_p("GPL v3 or later license.");
  32 }
  33
  34 static void init(void)
  35 {
  36   /* init socket connection */
  37   sfd =
  38     socket(PF_LOCAL,
  39            SOCK_STREAM,
  40            0);
  41   if(sfd < 0){
  42     perror("socket");
  43     exit(EXIT_FAILURE);
  44   }
  45
  46   struct sockaddr_un addr;
  47   addr.sun_family = AF_LOCAL;
  48   sprintf(addr.sun_path, "/run/user/1000/tomd/socket");
  49
  50   if(connect(sfd, (struct sockaddr *) &addr, SUN_LEN(&addr)) != 0){
  51     perror("connect");
  52     exit(EXIT_FAILURE);
  53   }
  54 }
  55
  56 #define HALLO "hallo there from dumb-client"
  57
  58 void write_hallo(void)
  59 {
  60   printf("writing hallo\n");
  61   ssize_t wrote =
  62     write(sfd, HALLO, sizeof HALLO);
  63   printf("wrote %d bytes.\n", wrote);
  64 }
  65
  66 static char *default_name = "no_name";
  67 static struct{
  68   char status, stop, kill, start;
  69   char  *name;
  70 } options;
  71
  72 static void extract_options(int argc, char **argv)
  73 {
  74   /* -status <name>  Get status - if we thought we ran it, current real status */
  75   /* -stop <name>    Run provided command to gently stop */
  76   /* -kill <name>    Aggressive killing of process (signal 15) */
  77   /* -start <name>   Run name */
  78   if(argc == 1){
  79     /* only tomc given */
  80     tomc_p("no args given.");
  81     exit(EXIT_SUCCESS);
  82   }
  83
  84   options.name = NULL;
  85
  86   for(int i = 1;
  87       i < argc;
  88       i++){
  89     char *arg = argv[i];
  90 #define X(op) {if(strcmp("-" #op, arg) == 0){options.op = 1; continue;}}
  91     X(status);
  92     X(stop);
  93     X(kill);
  94     X(start);
  95 #undef X
  96     /* assume last non option was the name */
  97     options.name = arg;
  98   }
  99
 100   if(options.name == NULL){
 101     options.name = default_name;
 102   }
 103 }
 104
 105 static void print_options()
 106 {
 107   tomc_p("---------");
 108   tomc_p("  name: %s", options.name);
 109   tomc_p("  kill: %d", options.kill);
 110   tomc_p("status: %d", options.status);
 111   tomc_p("  stop: %d", options.stop);
 112   tomc_p(" start: %d", options.start);
 113   tomc_p("---------");
 114 }
 115
 116 int main(int argc, char **argv)
 117 {
 118   header();
 119   extract_options(argc, argv);
 120   print_options();
 121   init();
 122
 123
 124   return EXIT_SUCCESS;
 125 }