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Member "vnstat-2.9/src/vnstat.c" (23 Jan 2022, 4286 Bytes) of package /linux/misc/vnstat-2.9.tar.gz:

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    1 /*
    2 vnStat - Copyright (C) 2002-2022 Teemu Toivola <tst@iki.fi>
    3 
    4    This program is free software; you can redistribute it and/or modify
    5    it under the terms of the GNU General Public License as published by
    6    the Free Software Foundation; version 2 dated June, 1991.
    7 
    8    This program is distributed in the hope that it will be useful,
    9    but WITHOUT ANY WARRANTY; without even the implied warranty of
   10    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   11    GNU General Public License for more details.
   12 
   13    You should have received a copy of the GNU General Public License along
   14    with this program; if not, write to the Free Software Foundation, Inc.,
   15    51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
   16 */
   17 
   18 #include "common.h"
   19 #include "ifinfo.h"
   20 #include "dbsql.h"
   21 #include "misc.h"
   22 #include "cfg.h"
   23 #include "ibw.h"
   24 #include "vnstat_func.h"
   25 
   26 int main(int argc, char *argv[])
   27 {
   28     int currentarg;
   29     DIR *dir = NULL;
   30     PARAMS p;
   31 
   32     initparams(&p);
   33 
   34     /* early check for debug and config parameter */
   35     if (argc > 1) {
   36         for (currentarg = 1; currentarg < argc; currentarg++) {
   37             if ((strcmp(argv[currentarg], "-D") == 0) || (strcmp(argv[currentarg], "--debug") == 0)) {
   38                 debug = 1;
   39                 printf("Debug enabled, vnstat %s\n", VERSION);
   40             } else if (strcmp(argv[currentarg], "--config") == 0) {
   41                 if (currentarg + 1 < argc) {
   42                     strncpy_nt(p.cfgfile, argv[currentarg + 1], 512);
   43                     if (debug)
   44                         printf("Used config file: %s\n", p.cfgfile);
   45                     currentarg++;
   46                 } else {
   47                     printf("Error: File for --config missing.\n");
   48                     return 1;
   49                 }
   50             }
   51         }
   52     }
   53 
   54     /* load config if available */
   55     if (!loadcfg(p.cfgfile, CT_CLI)) {
   56         return 1;
   57     }
   58     if (!ibwloadcfg(p.cfgfile)) {
   59         return 1;
   60     }
   61 
   62     configlocale();
   63     strncpy_nt(p.interface, "default", 32);
   64     strncpy_nt(p.definterface, cfg.iface, 32);
   65     strncpy_nt(p.alias, "none", 32);
   66 
   67     parseargs(&p, argc, argv);
   68 
   69     /* open database and see if it contains any interfaces */
   70     if (!p.traffic && !p.livetraffic) {
   71         if ((dir = opendir(cfg.dbdir)) != NULL) {
   72             if (debug)
   73                 printf("Dir OK\n");
   74             closedir(dir);
   75             if (!db_open_ro()) {
   76                 printf("Error: Failed to open database \"%s/%s\" in read-only mode.\n", cfg.dbdir, DATABASEFILE);
   77                 if (errno == ENOENT) {
   78                     printf("The vnStat daemon should have created the database when started.\n");
   79                     printf("Check that it is configured and running. See also \"man vnstatd\".\n");
   80                 }
   81                 return 1;
   82             }
   83             p.dbifcount = db_getinterfacecount();
   84             if (debug)
   85                 printf("%" PRIu64 " interface(s) found\n", p.dbifcount);
   86 
   87             if (p.dbifcount > 1) {
   88                 strncpy_nt(p.definterface, cfg.iface, 32);
   89             }
   90         } else {
   91             printf("Error: Unable to open database directory \"%s\": %s\n", cfg.dbdir, strerror(errno));
   92             if (errno == ENOENT) {
   93                 printf("The vnStat daemon should have created this directory when started.\n");
   94                 printf("Check that it is configured and running. See also \"man vnstatd\".\n");
   95             } else {
   96                 printf("Make sure it is at least read enabled for current user.\n");
   97                 printf("Use --help for help.\n");
   98             }
   99             return 1;
  100         }
  101     }
  102 
  103     /* set used interface if none specified */
  104     handleifselection(&p);
  105 
  106     /* parameter handlers */
  107     handleshowalert(&p);
  108     handleremoveinterface(&p);
  109     handlerenameinterface(&p);
  110     handleaddinterface(&p);
  111     handlesetalias(&p);
  112     handleshowdata(&p);
  113     handletrafficmeters(&p);
  114 
  115     /* show something if nothing was shown previously */
  116     if (!p.query && !p.traffic && !p.livetraffic) {
  117 
  118         /* give more help if there's no database */
  119         if (p.dbifcount == 0) {
  120             getifliststring(&p.ifacelist, 1);
  121             printf("No interfaces found in the database, nothing to do. Use --help for help.\n\n");
  122             printf("Interfaces can be added to the database with the following command:\n");
  123             printf("    %s --add -i eth0\n\n", argv[0]);
  124             printf("Replace 'eth0' with the interface that should be monitored.\n\n");
  125             if (strlen(cfg.cfgfile)) {
  126                 printf("The default interface can be changed by updating the \"Interface\" keyword\n");
  127                 printf("value in the configuration file \"%s\".\n\n", cfg.cfgfile);
  128             }
  129             printf("The following interfaces are currently available:\n    %s\n", p.ifacelist);
  130             free(p.ifacelist);
  131         } else {
  132             printf("Nothing to do. Use --help for help.\n");
  133         }
  134     }
  135 
  136     /* cleanup */
  137     db_close();
  138     ibwflush();
  139 
  140     return 0;
  141 }