source: trunk/monitas/common.c @ 357

Last change on this file since 357 was 353, checked in by bcornec, 13 years ago

monitas latest version

File size: 21.9 KB
Line 
1/* common.c - functions common to server.c and client.c
2
3
4
506/19
6- fixed silly bug in create_and_watch_fifo_for_commands()
7
806/16
9- added program_still_running()
10
1106/14
12- added create_and_watch_fifo_for_commands() from server.c
13- if log_it(fatal,...) then call terminate_daemon()
14
1506/11
16- added register_pid(), set_signals()
17- commented code a bit
18
1906/10
20- create function to call external executable in background
21- create function to wait for it to terminate & to grab its result
22- put them in common.c
23
24
25
26*/
27
28#include "structs.h"
29#include <stdarg.h>
30
31#define CLIENT_RCFILE           "/root/.monitas-client.rc"
32#define CLIENT_COMDEV           "/var/spool/monitas/client-input.dev"
33#define CLIENT_LOGFILE          "/var/log/monitas-client.log"
34#define SERVER_COMDEV           "/var/spool/monitas/server-input.dev"
35#define SERVER_STATUS_FILE      "/var/spool/monitas/server-status.txt"
36#define SERVER_LOGFILE          "/var/log/monitas-server.log"
37
38
39extern char g_command_fifo[MAX_STR_LEN+1];
40extern char g_logfile[MAX_STR_LEN+1];
41extern char *call_program_and_get_last_line_of_output(char*);
42extern int call_program_and_log_output (char *);
43extern bool does_file_exist (char *);
44extern int make_hole_for_file (char *outfile_fname);
45extern int process_incoming_command(char*);
46extern void terminate_daemon(int);
47
48
49void call_program_in_background(pthread_t*, char*);
50void *call_prog_in_bkgd_SUB(void*);
51int create_and_watch_fifo_for_commands(char*);
52int get_bkgd_prog_result(pthread_t*);
53//void log_it_SUB(char*, t_loglevel, char*);
54bool program_still_running(char*);
55int receive_file_from_socket(FILE*fout, int socket_fd);
56void register_pid(pid_t, char*);
57void set_signals(bool);
58char *tmsg_to_string(t_msg msg_type);
59int read_block_from_fd(int, char*, int);
60void termination_in_progress(int sig);
61int transmit_file_to_socket(FILE*fin, int socket_fd);
62char *my_basename(char *path);
63int parse_options(int argc, char *argv[]);
64
65/* global vars */
66
67/* global (semi-) static data.
68 * Always use following pointer to access this struct!!
69 * Struct is initialized by parse_options() */
70static struct s_globaldata  _global_data;
71/* Global Pointer to access the (semi-) static data */
72struct s_globaldata *g = & _global_data;
73
74
75
76/*-----------------------------------------------------------*/
77
78
79
80void call_program_in_background(pthread_t *thread, char*command)
81/*
82Purpose:Execute external binary in a background thread created
83        specially for this purpose. Return. Leave binary running.
84Params: thread - [returned] thread running in background
85        command - binary call to be executed
86Return: 0 if prog started ok; nonzero if failure
87NB:     Use get_bkgd_prog_result() to wait for binary to terminate
88        and to get binary's result (zero or nonzero)
89*/
90{
91  int res;
92
93  res = pthread_create(thread, NULL, call_prog_in_bkgd_SUB, (void*)command);
94  if (res) { log_it(fatal, "Unable to call program in background - thread creation failure %s", command); }
95  log_it(debug, "Done creating pthread. Will continue now.");
96}
97
98
99
100/*-----------------------------------------------------------*/
101
102
103
104void *call_prog_in_bkgd_SUB(void*cmd)
105{
106/*
107Purpose:Subroutine of call_program_in_background()
108Params: cmd - binary call to be executed
109Return: None
110*/
111  int res;
112
113  log_it(debug, "Calling '%s' in background pthread", cmd);
114  res = system(cmd);
115  log_it(debug, "'%s' is returning from bkgd process - res=%d", cmd, res);
116  pthread_exit((void*)res);
117}
118
119
120
121/*-----------------------------------------------------------*/
122
123
124
125int create_and_watch_fifo_for_commands(char*devpath)
126/*
127Purpose:Create a FIFO (device). Open it. Read commands from it
128        if/when they're echoed to it (e.g. backup, restore, ...)
129Params: devpath - path+filename of FIFO to create
130Return: result (nonzero=failure; else, infinite loop & notional 0)
131*/
132{
133  char incoming[MAX_STR_LEN+1];
134  int res=0, fd, len, pos=0;
135
136  res = make_hole_for_file(devpath) + mkfifo(devpath, 700);
137  if (res) { log_it(error, "Unable to prepare command FIFO %s", devpath); return(res); }
138  strncpy(g_command_fifo, devpath, MAX_STR_LEN);
139  if (!(fd = open(g_command_fifo, O_RDONLY))) { log_it(error, "Unable to openin command FIFO %s", g_command_fifo); return(1); }
140//  log_it(info, "Awaiting commands from FIFO");
141  for(;;)
142    {
143      len=read(fd, incoming+pos, 1);
144      if (len==0) { usleep(1000); continue; }
145      pos+=len;
146      incoming[pos]='\0';
147      if (incoming[pos-1]=='\n' || pos>=MAX_STR_LEN)
148        {
149          incoming[pos-1]='\0';
150          len=pos=0;
151          res=process_incoming_command(incoming);
152          if (res)
153            {
154              log_it(error,  "%s <-- errors occurred during processing", incoming);
155            }
156          else
157            {
158              log_it(info, "%s <-- command received OK", incoming);
159            }
160        }
161    } // forever
162  return(0);
163}
164
165
166/*-----------------------------------------------------------*/
167
168
169
170int get_bkgd_prog_result(pthread_t *thread)
171/*
172Purpose:Wait for external binary (running in background) to terminate.
173        Discover how it ended (w/success or w/failure?).
174Params: thread - thread running in background
175Return: result (0=success, nonzero=failure)
176NB:     Binary was executed by call_program_in_background(). This
177        subroutine should be called sometime after that call.
178*/
179{
180  void* vp;
181//  void**pvp;
182  int res;
183//  char *p, result_str[MAX_STR_LEN+1];
184
185/*  pvp=&vp;
186  vp=(void*)result_str;
187  strcpy(result_str, "(uninitialized)");
188  log_it(debug, "Waiting for bkgd prog to finish, so that we can get its result");
189  if (pthread_join(*thread, pvp)) { log_it(fatal, "pthread_join failed"); }
190  p = result_str;
191  p = (char*)vp;
192  res = atoi(p);
193  log_it(debug, "pthread res = %d ('%s')", res, p);
194*/
195  log_it(debug, "Waiting for bkgd prog to finish, so that we can get its result");
196  if ((res = pthread_join(*thread, &vp)) != 0)
197    {
198      log_it(fatal, "pthread_join failed with error  %s",
199        ((res==ESRCH)   ? "ESRCH - No thread could be found corresponding to that specified by 'thread'" :
200        ((res==EINVAL)  ? "EINVAL - The thread has been detached OR Another thread is already waiting on termination of it." :
201        ((res==EDEADLK) ? "EDEADLK - The 'tread' argument refers to the calling thread." :
202          "UNSPECIFIED"))));
203    }
204  *thread = 0;
205  res = (int) vp;
206  log_it(debug, "pthread res = %d ('%s')", res, (res>256 || res<-256) ? (char*)vp : "");
207  return(res);
208}
209
210
211
212/*-----------------------------------------------------------*/
213
214
215
216void log_it_SUB(char *logfile, t_loglevel level, char *sz_message)
217/*
218Purpose:Log event and its level of severity.
219Params: level - level of severity (debug/info/warn/error/fatal)
220        sz_message - message/event [string]
221Return: None
222*/
223{
224  char      *sz_level = "";
225  time_t time_rec;
226  struct tm  tm;
227  FILE*fout;
228
229  time(&time_rec);
230  localtime_r(&time_rec, &tm);
231  switch(level)
232    {
233      case debug: sz_level = "DEBUG"; break;
234      case info:  sz_level = "INFO "; break;
235      case warn:  sz_level = "WARN "; break;
236      case error: sz_level = "ERROR"; break;
237      case fatal: sz_level = "FATAL"; break;
238      default:    sz_level = "UNKWN"; break;
239    }
240  if ((int)level >= LOG_THESE_AND_HIGHER)
241    {
242      while (!(fout=fopen(logfile,"a")))
243        { usleep((int)(random()%32768)); }
244      fprintf(fout, "%02d:%02d:%02d %s: %s\n", tm.tm_hour, tm.tm_min, tm.tm_sec, sz_level, sz_message);
245      fclose(fout);
246    }
247  if (level==fatal)
248    {
249      fprintf(stderr, "Aborting now. See %s for more information.\n", logfile);
250      terminate_daemon(0);
251      exit(1);
252    }
253}
254
255
256
257/*-----------------------------------------------------------*/
258
259
260
261void logToFile(char *logfile, t_loglevel level, char *filename, char *lineno, char *funcname, char *sz_message, ...)
262/*
263Purpose: Log <sz_message> and its <level> of severity to <logfile>
264Params:  logfile      name of logfile
265         level        level of severity (debug/info/warn/error/fatal)
266         sz_message   message/event [string]
267     for <level>==debug the location of the event is specified by:
268         filename     name of the file, where <sz_message> was created
269         lineno       number of the line [string], where <sz_message> was created
270         funcname     name of the function, that created the event
271Return:  None
272*/
273{
274  char      *sz_level = "";
275  time_t     time_rec;
276  struct tm  tm;
277  FILE      *fout;
278  va_list    ap;
279
280
281  time(&time_rec);
282  va_start(ap, sz_message);       // initialize the variable arguments
283  localtime_r(&time_rec, &tm);
284  switch(level)
285    {
286      case debug:
287        {
288          // sz_level = "DEBUG"; break;
289          // at debug level we add filename, lineno and functionname instead of "DEBUG"
290          // i.e.  "file.c:123, subfunction()"
291          char *fmt = "%s:%s, %s()";
292          // calculate length of resulting string:
293          size_t size = strlen(fmt) -(3*2) + 1  // length of fmt-string minus 3x 2 chars ("%s") plus 1 for terminating \0'
294                        + strlen(filename)      //   plus length of filename
295                        + strlen(lineno)        //   plus length of linenumber
296                        + strlen(funcname);     //   plus length of functionname
297          sz_level = alloca(size);          // memory is automatically free'd when this function returns
298          snprintf(sz_level, size, "%s:%s, %s()", filename, lineno, funcname);
299        } break;
300      case info:  sz_level = "INFO "; break;
301      case warn:  sz_level = "WARN "; break;
302      case error: sz_level = "ERROR"; break;
303      case fatal: sz_level = "FATAL"; break;
304      default:    sz_level = "UNKWN"; break;
305    }
306  if ((int)level >= LOG_THESE_AND_HIGHER)
307    {
308      while (!(fout=fopen(logfile,"a")))
309        { usleep((int)(random()%32768)); }
310      fprintf(fout, "%02d:%02d:%02d %s: ", tm.tm_hour, tm.tm_min, tm.tm_sec, sz_level);  // print time and level
311      vfprintf(fout, sz_message, ap);             // print message (and further args)
312      fprintf(fout, "\n");
313      fclose(fout);
314    }
315  va_end(ap);                             // finalize the variable arguments
316  if (level==fatal)
317    {
318      fprintf(stderr, "Aborting now. See %s for more information.\n", logfile);
319      terminate_daemon(0);
320      exit(1);
321    }
322}
323
324
325
326/*-----------------------------------------------------------*/
327
328
329
330bool program_still_running(char*command)
331{
332  char comm_sub[MAX_STR_LEN+1],
333    tmp[MAX_STR_LEN+1];
334  strncpy(comm_sub, command, 40);
335  comm_sub[40] = '\0';
336  sprintf(tmp, "ps ax | grep \"%s\" | grep -v \"ps ax\" | grep -v \"grep \"", comm_sub);
337  if (call_program_and_log_output(tmp))
338    { return(false); }
339  else
340    { return(true); }
341}
342
343
344
345/*-----------------------------------------------------------*/
346
347
348
349int read_block_from_fd(int socket_fd, char*buf, int len_to_read)
350/*
351Purpose:Read N bytes from socket, into buffer
352Params: socket_fd - socket to be read from
353        buf - buffer where incoming data will be stored
354        len_to_read - bytes to be read from socket
355Return: bytes read
356NB:     if bytes read < len_to_read then there is
357        probably something wrong (e.g. EOF of pipe)
358*/
359{
360  int length, noof_tries, i=0;
361  char tmp[MAX_STR_LEN+1];
362
363//  log_it(debug, "Reading from pipe");
364  for(length=noof_tries=0; length<len_to_read && noof_tries<10; length+=i)
365    {
366      i = read(socket_fd, buf+length, len_to_read-length);
367      if (i==0) { noof_tries++; }
368      if (i<0) { log_it(error, "Error while reading from fd"); return(-1); }
369    }
370  if (length != len_to_read) { log_it(error, "Unable to continue reading from fd"); }
371  sprintf(tmp, "%d of %d bytes read from fd", length, len_to_read);
372  return(length);
373}
374
375
376
377/*-----------------------------------------------------------*/
378
379
380
381int receive_file_from_socket(FILE*fout, int socket_fd)
382/*
383Purpose:Receive file from socket and save to disk / stream.
384Params: socket_fd - file descriptor of socket
385    fout - file descriptor of output file
386Return: result (0=success, nonzero=failure)
387NB: socket_fd was created with open() but
388    fopen was created with fopen(). Different, see? Nyah.
389*/
390{
391  int res=0, length, rotor=0, incoming_len;
392  char tmp[MAX_STR_LEN+1], buf[XFER_BUF_SIZE];
393  bool done;
394  long long total_length=0;
395
396  signal(SIGPIPE, SIG_IGN);
397
398  length=99999;
399//  sleep(1);
400  for(done=false; !done; )
401    {
402      //      usleep(1000);
403      length = read_block_from_fd(socket_fd, buf, 3);
404      if (length<3) { log_it(debug, "Failed to read header block from fd"); res++; done=true; continue; }
405      rotor=(rotor%127)+1;
406      sprintf(tmp, "Rotor is %d (I was expecting %d)", buf[0], rotor);
407      if (buf[0]==0 && buf[1]==0x7B && buf[2]==0x21) { log_it(debug, "OK, end of stream. Cool."); done=true; continue; }
408//      log_it(debug, tmp);
409      if (buf[0]!=rotor) { log_it(debug, "Rotors do not match"); res++; break; }
410      incoming_len = buf[2];
411      if (incoming_len < 0) { incoming_len += 256; }
412      incoming_len += buf[1] * 256;
413      //      memcpy((char*)&incoming_len, buf+1, 2);
414      sprintf(tmp, "Expecting %d bytes in block #%d", incoming_len, rotor);
415//      log_it(debug, tmp);
416      length = read_block_from_fd(socket_fd, buf, incoming_len);
417/*
418      for(length=0,i=0; length<incoming_len; length+=i)
419    {
420      i = read(socket_fd, buf+length, incoming_len-length);
421      if (length<0) { log_it(debug, "Unable to read block in from socket_fd"); done=true; }
422      else if (length==0) { log_it(debug, "Zero-length block arrived from socket"); }
423      sprintf(tmp, "Read %d bytes from socket", i);
424//    log_it(debug, tmp);
425    }
426*/
427      if (length != incoming_len) { log_it(debug, "Error reading from socket"); res++; }
428      if (fwrite(buf, 1, length, fout)!=length) { log_it(debug, "Error writing data to output file"); res++; }
429      sprintf(tmp, "Written %d bytes to output stream", length);
430      total_length += length;
431//      log_it(debug, tmp);
432    }
433  if (total_length==0) { res++; log_it(debug, "Zero-length file received. Silly. I say that's an error."); }
434
435  signal(SIGPIPE, terminate_daemon);
436
437  return(res);
438}
439
440
441
442
443/*-----------------------------------------------------------*/
444
445
446
447void register_pid(pid_t pid, char*name_str)
448/*
449Purpose:Register executable's PID in /var/run/monitas-[name_str].pid;
450        store [pid] in data file
451Params: pid - process ID to be stored in data file
452        name_str - name (e.g. "client" or "server") to be included
453        in the data file name of the PID locking file
454Return: None
455NB:     Use pid=0 to delete the lock file and unregister the PID
456*/
457{
458  char tmp[MAX_STR_LEN+1], lockfile_fname[MAX_STR_LEN+1];
459  int res;
460  FILE*fin;
461
462  sprintf(lockfile_fname, "/var/run/monitas-%s.pid", name_str);
463  if (!pid)
464    {
465      log_it(debug, "Unregistering PID");
466      if (unlink(lockfile_fname)) { log_it(error, "Error unregistering PID"); }
467      return;
468    }
469  if (does_file_exist(lockfile_fname))
470    {
471      tmp[0]='\0';
472      if ((fin=fopen(lockfile_fname,"r"))) { fgets(tmp, MAX_STR_LEN, fin); fclose(fin); }
473      pid = atol(tmp);
474      sprintf(tmp, "ps %ld", (long int)pid);
475      res = call_program_and_log_output(tmp);
476      if (!res)
477        {
478          sprintf(tmp, "I believe the daemon is already running. If it isn't, please delete %s and try again.", lockfile_fname);
479          log_it(fatal, tmp);
480        }
481    }
482  sprintf(tmp, "echo %ld > %s", (long int)getpid(), lockfile_fname);
483  if (system(tmp)) { log_it(fatal, "Cannot register PID"); }
484}
485
486
487
488/*-----------------------------------------------------------*/
489
490
491
492void set_signals(bool on)
493/*
494Purpose:Turn on/off signal-trapping
495Params: on - turn on or off (true=on, false=off)
496Return: None
497*/
498{
499  int signals[]= { SIGKILL, SIGPIPE, SIGTERM, SIGHUP, SIGTRAP, SIGABRT, SIGINT, SIGSTOP, 0 };
500  int i;
501  for (i=0; signals[i]; i++)
502    {
503      if (on)
504        { signal(signals[i], terminate_daemon); }
505      else
506        { signal(signals[i], termination_in_progress); }
507    }
508}
509
510
511
512/*-----------------------------------------------------------*/
513
514
515
516void termination_in_progress(int sig)
517{
518  log_it(debug, "Termination in progress");
519  usleep(1000);
520  pthread_exit(NULL);
521}
522
523
524
525/*-----------------------------------------------------------*/
526
527
528
529char *tmsg_to_string(t_msg msg_type)
530/*
531Purpose:turn msg_type struct variable into a string
532Params: msg_type - type of message
533Return: pointer to static string containing text version of msg_type
534*/
535{
536  static char sz_msg[MAX_STR_LEN];
537  switch(msg_type)
538    {
539      case unused : strcpy(sz_msg, "unused"); break;
540      case login  : strcpy(sz_msg, "login"); break;
541      case logout : strcpy(sz_msg, "logout"); break;
542      case login_ok:strcpy(sz_msg, "login_ok"); break;
543      case logout_ok:strcpy(sz_msg, "logout_ok"); break;
544      case ping   : strcpy(sz_msg, "ping"); break;
545      case pong   : strcpy(sz_msg, "pong"); break;
546      case login_fail : strcpy(sz_msg, "login_fail"); break;
547      case logout_fail: strcpy(sz_msg, "logout_fail"); break;
548      case trigger_backup: strcpy(sz_msg, "trigger_backup"); break;
549      case trigger_compare:strcpy(sz_msg, "trigger_compare"); break;
550      case trigger_restore:strcpy(sz_msg, "trigger_restore"); break;
551      case begin_stream:   strcpy(sz_msg, "begin_stream"); break;
552      case end_stream:     strcpy(sz_msg, "end_stream"); break;
553      case backup_ok:      strcpy(sz_msg, "backup_ok"); break;
554      case backup_fail:    strcpy(sz_msg, "backup_fail"); break;
555      case compare_ok:     strcpy(sz_msg, "compare_ok"); break;
556      case compare_fail:   strcpy(sz_msg, "compare_fail"); break;
557      case restore_ok:     strcpy(sz_msg, "restore_ok"); break;
558      case restore_fail:   strcpy(sz_msg, "restore_fail"); break;
559      case user_req:       strcpy(sz_msg, "user_req"); break;
560      case progress_rpt:   strcpy(sz_msg, "progress_rpt"); break;
561      default: strcpy(sz_msg, "(Fix tmsg_to_string please)"); break;
562    }
563  return(sz_msg);
564}
565
566
567
568/*-----------------------------------------------------------*/
569
570
571
572int transmit_file_to_socket(FILE*fin, int socket_fd)
573/*
574Purpose:Transmit file to socket, from disk / stream.
575Params: socket_fd - file descriptor of socket
576    fin - file descriptor of input file
577Return: result (0=success, nonzero=failure)
578NB: socket_fd was created with open() but
579    fopen was created with fopen(). Different, see? Nyah.
580*/
581{
582  char tmp[MAX_STR_LEN+1], buf[XFER_BUF_SIZE];
583  int length, retval=0, rotor=0;
584  bool done;
585
586  signal(SIGPIPE, SIG_IGN);
587  for(done=false; !done; )
588    {
589      if (feof(fin))
590    {
591      log_it(debug, "eof(fin) - OK, stopped reading from mondoarchive");
592      done=true;
593      continue;
594    }
595//      log_it(debug, "Reading from mondoarchive");
596      length = fread(buf, 1, XFER_BUF_SIZE, fin); /* read from fifo (i.e. mondoarchive) */
597//      sprintf(tmp, "%d bytes read from mondoarchive", length); log_it(debug, tmp);
598      if (length > 0)
599    {
600      tmp[0] = (char)(rotor=(rotor%127)+1);
601      tmp[1] = (char)(length / 256);
602      tmp[2] = (char)(length % 256);
603      if (write(socket_fd, tmp, 3)!=3) { log_it(debug, "Failed to write rotor and block_len to socket"); retval++; done=true; continue; }
604//    else { log_it(debug, "rotor and block_len written to socket"); }
605      if (write(socket_fd, buf, length)!=length) { log_it(debug, "Failed to write block read from mondoarchive to socket"); retval++; done=true; continue; }
606      else
607        { 
608          sprintf(tmp, "Block #%d (%d bytes) written to socket", rotor, length);
609//        log_it(debug, tmp);
610        }
611    }
612      else if (length < 0)
613    { log_it(warn, "I had trouble reading from FIFO while calling mondoarchive"); }
614    }
615  if (retval==0)
616    {
617//      log_it(debug, "Writing final rotor (the 'end of stream' one) to socket");
618      tmp[0]=0;
619      tmp[1]=0x7B;
620      tmp[2]=0x21;
621      if (write(socket_fd, tmp, 3)!=3) { log_it(debug, "Failed to write end-of-stream rotor to socket"); retval++; }
622    }
623  log_it(debug, "Closed fopen() to tempdev");
624//  fclose(fin);
625  signal(SIGPIPE, terminate_daemon);
626  return(retval);
627}
628
629
630
631/*-----------------------------------------------------------*/
632
633
634/*
635Purpose: strip directory from filenames
636Params:  path    like: "dir1/dir2/file"
637Return:  result  pointer to the first character behind the last '/'
638*/
639char *my_basename(char *path)
640{
641    char *name;
642    if (path == NULL)
643        return (NULL);
644    name = strrchr(path, '/');
645    if (name == NULL)
646        return (path);   /* only a filename was given */
647    else
648        return (++name); /* skip the '/' and return pointer to next char */
649}
650
651
652
653
654/*-----------------------------------------------------------*/
655
656
657/*
658Purpose: analyse command line arguments and write them to global struct
659Params:  argc   number of arguments
660         argv   arguments as array of strings
661Return: result (0=success, nonzero=failure)
662*/
663int parse_options(int argc, char *argv[])
664{
665    // initialize the global data structure
666    memset( g, 0, sizeof(struct s_globaldata));
667
668    // we use malloc() here for default strings, as we wanna use free() later
669    // when changing the value. free()ing mem in the text segment would be a
670    // bad idea...
671
672    /* Initialize default values */
673#define INIT_DEFAULT_STRING(var, string)                       \
674    if ( ((var) = (char*) malloc(strlen(string)+1)) != NULL )  \
675       strcpy((var), string)
676
677    INIT_DEFAULT_STRING( g->client_rcfile, CLIENT_RCFILE );
678    INIT_DEFAULT_STRING( g->client_comdev, CLIENT_COMDEV );
679    INIT_DEFAULT_STRING( g->server_comdev, SERVER_COMDEV );
680    INIT_DEFAULT_STRING( g->server_status_file, SERVER_STATUS_FILE );
681
682    g->loglevel = LOG_THESE_AND_HIGHER;   // log messages with level >= loglevel to logfile
683
684    // evaluate if we're server or client:
685    // We decide it by looking at the name of the running program
686    if (strstr(my_basename(argv[0]), "server") != NULL)
687      {          // the server may be named 'server', 'monitos-server', 'monserver_start', ...
688        INIT_DEFAULT_STRING( g->logfile, SERVER_LOGFILE );
689      }
690    else if (strstr(my_basename(argv[0]), "client") != NULL)
691      {          // the client may be named 'client', 'monitos-client', 'monclient_start', ...
692        INIT_DEFAULT_STRING( g->logfile, CLIENT_LOGFILE );
693      }
694    else  /* this should never happen */
695      {
696        fprintf(stderr, "Don't know if we're running as server or client, when started as %s", my_basename(argv[0]));
697        INIT_DEFAULT_STRING( g->logfile, "/var/log/monitas.log" );
698      }
699
700#undef INIT_DEFAULT_STRING
701    return 0;
702}
703
704
705
706
707
708
709
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