diff --git a/ZWO_cameras/zwofunc.c b/ZWO_cameras/zwofunc.c
index e27d775..1493c2a 100644
--- a/ZWO_cameras/zwofunc.c
+++ b/ZWO_cameras/zwofunc.c
@@ -474,7 +474,7 @@ static void vstub(){
     return;
 }
 static int istub(_U_ int N){
-    return TRUE;
+    return FALSE;
 }
 
 /*
diff --git a/ccdfunc.c b/ccdfunc.c
index aebcff5..de448c7 100644
--- a/ccdfunc.c
+++ b/ccdfunc.c
@@ -146,8 +146,9 @@ static void addrec(fitsfile *f, char *filename){
 }
 
 // save FITS file `img` into GP->outfile or GP->outfileprefix_XXXX.fits
+// if outp != NULL, put into it strdup() of last file name
 // return FALSE if failed
-int saveFITS(IMG *img){
+int saveFITS(IMG *img, char **outp){
     int ret = FALSE;
     if(!camera){
         LOGERR("Can't save image: no camera device");
@@ -224,8 +225,8 @@ int saveFITS(IMG *img){
     WRITEKEY(fp, TSTRING, "GEOMETRY", bufc, "Camera current frame geometry");    // CRVAL1, CRVAL2 / Offset in X, Y
     if(GP->X0 > -1) WRITEKEY(fp, TINT, "X0", &GP->X0, "Subframe left border without binning");
     if(GP->Y0 > -1) WRITEKEY(fp, TINT, "Y0", &GP->Y0, "Subframe upper border without binning");
-    if(GP->objtype) strncpy(bufc, GP->objtype, FLEN_CARD-1);
-    else if(GP->dark) sprintf(bufc, "dark");
+    if(GP->dark) sprintf(bufc, "dark");
+    else if(GP->objtype) strncpy(bufc, GP->objtype, FLEN_CARD-1);
     else sprintf(bufc, "light");
     // IMAGETYP / object, flat, dark, bias, scan, eta, neon, push
     WRITEKEY(fp, TSTRING, "IMAGETYP", bufc, "Image type");
@@ -327,11 +328,15 @@ int saveFITS(IMG *img){
     TRYFITS(fits_write_img, fp, TUSHORT, 1, width * height, data);
     if(fitserror) goto cloerr;
     TRYFITS(fits_close_file, fp);
-    DBG("file %s saved", fnam);
 cloerr:
     if(fitserror == 0){
         LOGMSG("Save file '%s'", fnam);
         verbose(1, _("File saved as '%s'"), fnam);
+        DBG("file %s saved", fnam);
+        if(outp){
+            FREE(*outp);
+            *outp = strdup(fnam);
+        }
         ret = TRUE;
     }else{
         LOGERR("Can't save %s", fnam);
@@ -761,7 +766,7 @@ void ccds(){
             break;
         }
         calculate_stat(&ima);
-        saveFITS(&ima);
+        saveFITS(&ima, NULL);
 #ifdef IMAGEVIEW
         if(GP->showimage){ // display image
             if((mainwin = getWin())){
diff --git a/ccdfunc.h b/ccdfunc.h
index 1ad670a..b747cce 100644
--- a/ccdfunc.h
+++ b/ccdfunc.h
@@ -27,7 +27,7 @@ extern Focuser *focuser;
 extern Wheel *wheel;
 
 void calculate_stat(IMG *image);
-int saveFITS(IMG *img); // for imageview module
+int saveFITS(IMG *img, char **outp); // for imageview module
 void focusers();
 void wheels();
 void ccds();
diff --git a/client.c b/client.c
index d6b2122..6d0092f 100644
--- a/client.c
+++ b/client.c
@@ -76,7 +76,13 @@ static char *getans(int sock){
         buf[n] = 0;
         DBG("Got from server: %s", buf);
         verbose(1, "%s", buf);
-        if(buf[n-1] == '\n') break;
+        if(buf[n-1] == '\n'){
+            buf[n-1] = 0;
+            break;
+        }
+    }
+    if(0 == strcmp(hresult2str(RESULT_BUSY), buf)){
+        ERRX("Server busy");
     }
     return ans;
 }
@@ -108,16 +114,42 @@ static void process_data(int sock){
     if(!isnan(GP->gain)) SENDMSG(CMD_GAIN "=%g", GP->gain);
     if(!isnan(GP->brightness)) SENDMSG(CMD_BRIGHTNESS "=%g", GP->brightness);
     if(GP->nflushes > 0) SENDMSG(CMD_NFLUSHES "=%d", GP->nflushes);
-    if(GP->outfile || GP->outfileprefix){
+    if(GP->outfile || GP->outfileprefix){ // exposition and reading control: only if start of exposition
+        if(GP->_8bit) SENDMSG(CMD_8BIT "=1");
+        else SENDMSG(CMD_8BIT "=0");
+        if(GP->fast) SENDMSG(CMD_FASTSPD "=1");
+        else SENDMSG(CMD_FASTSPD "=0");
+        if(GP->dark) SENDMSG(CMD_DARK "=1");
+        else SENDMSG(CMD_DARK "=0");
+    }
+    if(GP->outfile){
+        SENDMSG(CMD_FILENAME "=%s", makeabspath(GP->outfile, FALSE));
         if(GP->rewrite) SENDMSG(CMD_REWRITE "=1");
         else SENDMSG(CMD_REWRITE "=0");
     }
-    if(GP->outfile) SENDMSG(CMD_FILENAME "=%s", makeabspath(GP->outfile));
-    if(GP->outfileprefix) SENDMSG(CMD_FILENAMEPREFIX "=%s", makeabspath(GP->outfileprefix));
-    // if client gives filename and exptime, make exposition
-    if(GP->exptime > -DBL_EPSILON){
-        SENDMSG(CMD_EXPOSITION "=%g", GP->exptime);
-        if(GP->outfile || GP->outfileprefix) SENDMSG(CMD_EXPSTATE "=%d", CAMERA_CAPTURE);
+    if(GP->outfileprefix) SENDMSG(CMD_FILENAMEPREFIX "=%s", makeabspath(GP->outfileprefix, FALSE));
+    if(GP->exptime > -DBL_EPSILON) SENDMSG(CMD_EXPOSITION "=%g", GP->exptime);
+    // FITS header keywords:
+#define CHKHDR(x, cmd)   do{if(x) SENDMSG(cmd "=%s", x);}while(0)
+    CHKHDR(GP->author, CMD_AUTHOR);
+    CHKHDR(GP->instrument, CMD_INSTRUMENT);
+    CHKHDR(GP->observers, CMD_OBSERVER);
+    CHKHDR(GP->objname, CMD_OBJECT);
+    CHKHDR(GP->prog_id, CMD_PROGRAM);
+    CHKHDR(GP->objtype, CMD_OBJTYPE);
+#undef CHKHDR
+    if(GP->addhdr){
+        char buf[1024], *ptr = buf, **sptr = GP->addhdr;
+        *buf = 0;
+        int L = 1024;
+        while(*sptr){
+            if(!**sptr){
+                ++sptr; continue;
+            }
+            int N = snprintf(ptr, L-1, "%s,", *sptr++);
+            L -= N; ptr += N;
+        }
+        SENDMSG(CMD_HEADERFILES "=%s", buf);
     }
     // common information
     SENDMSG(CMD_INFO);
@@ -125,14 +157,23 @@ static void process_data(int sock){
 
 void client(int sock){
     process_data(sock);
-    double timeout = GP->waitexpend ? CLIENT_TIMEOUT : 0.1;
     double t0 = dtime(), tw = t0;
+    int Nremain = 0, nframe = 1;
+    // if client gives filename/prefix or Nframes, make exposition
+    if(GP->outfile || GP->outfileprefix || GP->nframes > 0){
+        Nremain = GP->nframes - 1;
+        if(Nremain < 1) Nremain = 0;
+        else GP->waitexpend = TRUE; // N>1 - wait for exp ends
+        SENDMSG(CMD_EXPSTATE "=%d", CAMERA_CAPTURE);
+    }
+    double timeout = GP->waitexpend ? CLIENT_TIMEOUT : 0.1;
+    verbose(1, "Exposing frame 1");
+    if(GP->waitexpend) verbose(2, "Wait for exposition end");
     while(dtime() - t0 < timeout){
         if(GP->waitexpend && dtime() - tw > WAIT_TIMEOUT){
             SENDMSG(CMD_TREMAIN); // get remained time
             tw = dtime();
             sprintf(sendbuf, "%s", CMD_EXPSTATE);
-            verbose(2, "%s", sendbuf);
             sendstrmessage(sock, sendbuf);
         }
         char *ans = getans(sock);
@@ -147,7 +188,27 @@ void client(int sock){
                 }
                 if(state != CAMERA_CAPTURE){
                     verbose(2, "Frame ready!");
-                    return;
+                    SENDMSG(CMD_LASTFNAME);
+                    if(Nremain){
+                        if(GP->pause_len > 0){
+                            double delta, time1 = dtime() + GP->pause_len;
+                            while(1){
+                                SENDMSG(CMD_CAMTEMPER);
+                                if((delta = time1 - dtime()) < __FLT_EPSILON__) break;
+                                // %d ΣΕΛΥΞΔ ΔΟ ΟΛΟΞήΑΞΙΡ ΠΑΥΪΩ\n
+                                if(delta > 1.) verbose(1, _("%d seconds till pause ends\n"), (int)delta);
+                                if(delta > 6.) sleep(5);
+                                else if(delta > 1.) sleep((int)delta);
+                                else usleep((int)(delta*1e6 + 1));
+                            }
+                        }
+                        verbose(1, "Exposing frame %d", ++nframe);
+                        --Nremain;
+                        SENDMSG(CMD_EXPSTATE "=%d", CAMERA_CAPTURE);
+                    }else{
+                        GP->waitexpend = 0;
+                        timeout = 0.2; // wait for last file name
+                    }
                 }
             }
         }
diff --git a/cmdlnopts.c b/cmdlnopts.c
index d0cc7be..3fc802e 100644
--- a/cmdlnopts.c
+++ b/cmdlnopts.c
@@ -89,7 +89,7 @@ myoption cmdlnopts[] = {
     {"conf-ioport",NEED_ARG,NULL,   'c',    arg_int,    APTR(&G.confio),    N_("configure I/O port pins to given value (decimal number, pin1 is LSB, 1 == output, 0 == input)")},
 
     {"goto",    NEED_ARG,   NULL,   'g',    arg_double, APTR(&G.gotopos),   N_("move focuser to absolute position, mm")},
-    {"addsteps",NEED_ARG,   NULL,   'a',    arg_double, APTR(&G.addsteps),  N_("move focuser to relative position, mm")},
+    {"addsteps",NEED_ARG,   NULL,   'a',    arg_double, APTR(&G.addsteps),  N_("move focuser to relative position, mm (only for standalone)")},
 
     {"wheel-set",NEED_ARG,  NULL,   'w',    arg_int,    APTR(&G.setwheel),  N_("set wheel position")},
 
@@ -119,7 +119,7 @@ myoption cmdlnopts[] = {
  */
 glob_pars *parse_args(int argc, char **argv){
     // format of help: "Usage: progname [args]\n"
-    change_helpstring("Usage: %s [args] [output file prefix]\n\n\tWhere args are:\n");
+    change_helpstring("Usage: %s [args] [output file prefix]\nTo restart server kill it with SIGUSR1\n\tArgs are:\n");
     // parse arguments
     parseargs(&argc, &argv, cmdlnopts);
     if(help) showhelp(-1, cmdlnopts);
diff --git a/imageview.c b/imageview.c
index 06e6bd3..1309277 100644
--- a/imageview.c
+++ b/imageview.c
@@ -489,7 +489,7 @@ void* image_thread(_U_ void *data){
         if(win && win->winevt){
             if(win->winevt & WINEVT_SAVEIMAGE){ // save image
                 verbose(2, "Make screenshot\n");
-                saveFITS(img);
+                saveFITS(img, NULL);
                 win->winevt &= ~WINEVT_SAVEIMAGE;
             }
             if(win->winevt & WINEVT_ROLLCOLORFUN){
diff --git a/locale/ru/messages.po b/locale/ru/messages.po
index 2d98da9..1150899 100644
--- a/locale/ru/messages.po
+++ b/locale/ru/messages.po
@@ -8,7 +8,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: PACKAGE VERSION\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2022-03-18 16:49+0300\n"
+"POT-Creation-Date: 2022-03-21 18:20+0300\n"
 "PO-Revision-Date: YEAR-MO-DA HO:MI+ZONE\n"
 "Last-Translator: FULL NAME <EMAIL@ADDRESS>\n"
 "Language-Team: LANGUAGE <LL@li.org>\n"
@@ -202,7 +202,7 @@ msgid "move focuser to absolute position, mm"
 msgstr ""
 
 #: cmdlnopts.c:92
-msgid "move focuser to relative position, mm"
+msgid "move focuser to relative position, mm (only for standalone)"
 msgstr ""
 
 #: cmdlnopts.c:94
@@ -261,16 +261,16 @@ msgstr ""
 msgid "Can't find wheel in plugin %s: %s"
 msgstr ""
 
-#: ccdfunc.c:154
+#: ccdfunc.c:155
 msgid "Camera device unknown"
 msgstr ""
 
-#: ccdfunc.c:160
+#: ccdfunc.c:161
 msgid "Neither filename nor filename prefix pointed!"
 msgstr ""
 
 #. НС ΠΌΠΎΠ³Ρƒ ΡΠΎΡ…Ρ€Π°Π½ΠΈΡ‚ΡŒ Ρ„Π°ΠΉΠ»
-#: ccdfunc.c:179
+#: ccdfunc.c:180
 #, c-format
 msgid "Can't save file with prefix %s"
 msgstr ""
@@ -280,281 +280,281 @@ msgstr ""
 msgid "File saved as '%s'"
 msgstr ""
 
-#: ccdfunc.c:338
+#: ccdfunc.c:343
 msgid "Error saving file"
 msgstr ""
 
-#: ccdfunc.c:378
+#: ccdfunc.c:383
 #, c-format
 msgid "Image stat:\n"
 msgstr ""
 
-#: ccdfunc.c:386
+#: ccdfunc.c:391
 msgid "Focuser device not pointed"
 msgstr ""
 
-#: ccdfunc.c:393
+#: ccdfunc.c:398
 msgid "No focusers found"
 msgstr ""
 
-#: ccdfunc.c:424
+#: ccdfunc.c:429
 #, c-format
 msgid "Found %d focusers, you point number %d"
 msgstr ""
 
-#: ccdfunc.c:428
+#: ccdfunc.c:433
 msgid "Can't set active focuser number"
 msgstr ""
 
-#: ccdfunc.c:442
+#: ccdfunc.c:447
 msgid "Can't get focuser limit positions"
 msgstr ""
 
-#: ccdfunc.c:449
+#: ccdfunc.c:454
 msgid "Can't get current focuser position"
 msgstr ""
 
-#: ccdfunc.c:463
+#: ccdfunc.c:468
 #, c-format
 msgid "Can't set position %g: out of limits [%g, %g]"
 msgstr ""
 
-#: ccdfunc.c:467
+#: ccdfunc.c:472
 msgid "Can't home focuser"
 msgstr ""
 
-#: ccdfunc.c:469
+#: ccdfunc.c:474
 #, c-format
 msgid "Can't set position %g"
 msgstr ""
 
-#: ccdfunc.c:477
+#: ccdfunc.c:482
 msgid "Wheel device not pointed"
 msgstr ""
 
-#: ccdfunc.c:484
+#: ccdfunc.c:489
 msgid "No wheels found"
 msgstr ""
 
-#: ccdfunc.c:515
+#: ccdfunc.c:520
 #, c-format
 msgid "Found %d wheels, you point number %d"
 msgstr ""
 
-#: ccdfunc.c:519
+#: ccdfunc.c:524
 msgid "Can't set active wheel number"
 msgstr ""
 
-#: ccdfunc.c:535
+#: ccdfunc.c:540
 msgid "Can't get max wheel position"
 msgstr ""
 
-#: ccdfunc.c:542
+#: ccdfunc.c:547
 #, c-format
 msgid "Wheel position should be from 0 to %d"
 msgstr ""
 
-#: ccdfunc.c:546
+#: ccdfunc.c:551
 #, c-format
 msgid "Can't set wheel position %d"
 msgstr ""
 
-#: ccdfunc.c:563
+#: ccdfunc.c:568
 #, c-format
 msgid "%.1f seconds till exposition ends"
 msgstr ""
 
-#: ccdfunc.c:577
+#: ccdfunc.c:582
 msgid "Camera device not pointed"
 msgstr ""
 
-#: ccdfunc.c:584 ccdfunc.c:585
+#: ccdfunc.c:589 ccdfunc.c:590
 msgid "No cameras found"
 msgstr ""
 
-#: ccdfunc.c:620
+#: ccdfunc.c:625
 #, c-format
 msgid "Found %d cameras, you point number %d"
 msgstr ""
 
-#: ccdfunc.c:624
+#: ccdfunc.c:629
 msgid "Can't set active camera number"
 msgstr ""
 
-#: ccdfunc.c:630
+#: ccdfunc.c:635
 msgid "Can't set fan speed"
 msgstr ""
 
-#: ccdfunc.c:631
-#, c-format
-msgid "Set fan speed to %d"
-msgstr ""
-
 #: ccdfunc.c:636
 #, c-format
+msgid "Set fan speed to %d"
+msgstr ""
+
+#: ccdfunc.c:641
+#, c-format
 msgid "Camera model: %s"
 msgstr ""
 
-#: ccdfunc.c:637
+#: ccdfunc.c:642
 #, c-format
 msgid "Pixel size: %g x %g"
 msgstr ""
 
-#: ccdfunc.c:643
+#: ccdfunc.c:648
 #, c-format
 msgid "Full array: %s"
 msgstr ""
 
-#: ccdfunc.c:646
+#: ccdfunc.c:651
 #, c-format
 msgid "Field of view: %s"
 msgstr ""
 
-#: ccdfunc.c:649
+#: ccdfunc.c:654
 #, c-format
 msgid "Can't set T to %g degC"
 msgstr ""
 
-#: ccdfunc.c:656
+#: ccdfunc.c:661
 #, c-format
 msgid "Shutter command: %s\n"
 msgstr ""
 
-#: ccdfunc.c:658
+#: ccdfunc.c:663
 #, c-format
 msgid "Can't run shutter command %s (unsupported?)"
 msgstr ""
 
 #. "ΠŸΠΎΠΏΡ‹Ρ‚ΠΊΠ° ΡΠΊΠΎΠ½Ρ„ΠΈΠ³ΡƒΡ€ΠΈΡ€ΠΎΠ²Π°Ρ‚ΡŒ ΠΏΠΎΡ€Ρ‚ I/O ΠΊΠ°ΠΊ %d\n"
-#: ccdfunc.c:662
+#: ccdfunc.c:667
 #, c-format
 msgid "Try to configure I/O port as %d"
 msgstr ""
 
-#: ccdfunc.c:664
+#: ccdfunc.c:669
 msgid "Can't configure (unsupported?)"
 msgstr ""
 
-#: ccdfunc.c:670
+#: ccdfunc.c:675
 msgid "Can't get IOport state (unsupported?)"
 msgstr ""
 
 #. "ΠŸΠΎΠΏΡ‹Ρ‚ΠΊΠ° записи %d Π² ΠΏΠΎΡ€Ρ‚ I/O\n"
-#: ccdfunc.c:674
+#: ccdfunc.c:679
 #, c-format
 msgid "Try to write %d to I/O port"
 msgstr ""
 
-#: ccdfunc.c:676
+#: ccdfunc.c:681
 msgid "Can't set IOport"
 msgstr ""
 
-#: ccdfunc.c:683
+#: ccdfunc.c:688
 #, c-format
 msgid "Set gain to %g"
 msgstr ""
 
-#: ccdfunc.c:684
+#: ccdfunc.c:689
 #, c-format
 msgid "Can't set gain to %g"
 msgstr ""
 
-#: ccdfunc.c:689
+#: ccdfunc.c:694
 #, c-format
 msgid "Set brightness to %g"
 msgstr ""
 
-#: ccdfunc.c:690
+#: ccdfunc.c:695
 #, c-format
 msgid "Can't set brightness to %g"
 msgstr ""
 
-#: ccdfunc.c:698 server.c:199
+#: ccdfunc.c:703 server.c:209
 #, c-format
 msgid "Can't set binning %dx%d"
 msgstr ""
 
-#: ccdfunc.c:708 server.c:200
+#: ccdfunc.c:713 server.c:210
 msgid "Can't set given geometry"
 msgstr ""
 
-#: ccdfunc.c:712
+#: ccdfunc.c:717
 #, c-format
 msgid "Can't set %d flushes"
 msgstr ""
 
-#: ccdfunc.c:716
+#: ccdfunc.c:721
 #, c-format
 msgid "Can't set exposure time to %f seconds"
 msgstr ""
 
-#: ccdfunc.c:719
+#: ccdfunc.c:724
 msgid "Can't change frame type"
 msgstr ""
 
-#: ccdfunc.c:722
+#: ccdfunc.c:727
 msgid "Can't set bit depth"
 msgstr ""
 
-#: ccdfunc.c:724
+#: ccdfunc.c:729
 msgid "Can't set readout speed"
 msgstr ""
 
-#: ccdfunc.c:725
+#: ccdfunc.c:730
 #, c-format
 msgid "Readout mode: %s"
 msgstr ""
 
-#: ccdfunc.c:726
+#: ccdfunc.c:731
 msgid "Only show statistics"
 msgstr ""
 
 #. GET binning should be AFTER setgeometry!
-#: ccdfunc.c:728
+#: ccdfunc.c:733
 msgid "Can't get current binning"
 msgstr ""
 
-#: ccdfunc.c:741
+#: ccdfunc.c:746
 msgid "Can't open OpenGL window, image preview will be inaccessible"
 msgstr ""
 
 #. Π—Π°Ρ…Π²Π°Ρ‚ ΠΊΠ°Π΄Ρ€Π° %d\n
-#: ccdfunc.c:748
+#: ccdfunc.c:753
 #, c-format
 msgid "Capture frame %d"
 msgstr ""
 
-#: ccdfunc.c:750 server.c:108
+#: ccdfunc.c:755 server.c:118
 msgid "Can't start exposition"
 msgstr ""
 
-#: ccdfunc.c:754 ccdfunc.c:776 ccdfunc.c:817
+#: ccdfunc.c:759 ccdfunc.c:781 ccdfunc.c:822
 msgid "Can't capture image"
 msgstr ""
 
-#: ccdfunc.c:757
+#: ccdfunc.c:762
 msgid "Read grabbed image"
 msgstr ""
 
-#: ccdfunc.c:760 ccdfunc.c:780 ccdfunc.c:821
+#: ccdfunc.c:765 ccdfunc.c:785 ccdfunc.c:826
 msgid "Can't grab image"
 msgstr ""
 
 #. %d сСкунд Π΄ΠΎ окончания ΠΏΠ°ΡƒΠ·Ρ‹\n
-#: ccdfunc.c:797
+#: ccdfunc.c:802 client.c:199
 #, c-format
 msgid "%d seconds till pause ends\n"
 msgstr ""
 
-#: server.c:146
+#: server.c:156
 msgid "No camera device"
 msgstr ""
 
-#: client.c:145
+#: client.c:186
 msgid "Can't make exposition"
 msgstr ""
 
-#: client.c:155
+#: client.c:216
 msgid "Server timeout"
 msgstr ""
 
diff --git a/locale/ru/ru.po b/locale/ru/ru.po
index 0efda7c..99262b3 100644
--- a/locale/ru/ru.po
+++ b/locale/ru/ru.po
@@ -7,7 +7,7 @@
 msgid   ""
 msgstr  "Project-Id-Version: PACKAGE VERSION\n"
         "Report-Msgid-Bugs-To: \n"
-        "POT-Creation-Date: 2022-03-18 16:49+0300\n"
+        "POT-Creation-Date: 2022-03-21 18:20+0300\n"
         "PO-Revision-Date: YEAR-MO-DA HO:MI+ZONE\n"
         "Last-Translator: FULL NAME <EMAIL@ADDRESS>\n"
         "Language-Team: LANGUAGE <LL@li.org>\n"
@@ -16,13 +16,13 @@ msgstr  "Project-Id-Version: PACKAGE VERSION\n"
         "Content-Type: text/plain; charset=koi8-r\n"
         "Content-Transfer-Encoding: 8bit\n"
 
-#: ccdfunc.c:563
+#: ccdfunc.c:568
 #, c-format
 msgid   "%.1f seconds till exposition ends"
 msgstr  ""
 
 #. %d сСкунд Π΄ΠΎ окончания ΠΏΠ°ΡƒΠ·Ρ‹\n
-#: ccdfunc.c:797
+#: ccdfunc.c:802 client.c:199
 #, c-format
 msgid   "%d seconds till pause ends\n"
 msgstr  ""
@@ -39,28 +39,28 @@ msgstr  ""
 msgid   "CMOS gain level"
 msgstr  ""
 
-#: ccdfunc.c:577
+#: ccdfunc.c:582
 msgid   "Camera device not pointed"
 msgstr  ""
 
-#: ccdfunc.c:154
+#: ccdfunc.c:155
 msgid   "Camera device unknown"
 msgstr  ""
 
-#: ccdfunc.c:636
+#: ccdfunc.c:641
 #, c-format
 msgid   "Camera model: %s"
 msgstr  ""
 
-#: ccdfunc.c:754 ccdfunc.c:776 ccdfunc.c:817
+#: ccdfunc.c:759 ccdfunc.c:781 ccdfunc.c:822
 msgid   "Can't capture image"
 msgstr  ""
 
-#: ccdfunc.c:719
+#: ccdfunc.c:724
 msgid   "Can't change frame type"
 msgstr  ""
 
-#: ccdfunc.c:664
+#: ccdfunc.c:669
 msgid   "Can't configure (unsupported?)"
 msgstr  ""
 
@@ -84,32 +84,32 @@ msgstr  ""
 msgid   "Can't find wheel in plugin %s: %s"
 msgstr  ""
 
-#: ccdfunc.c:670
+#: ccdfunc.c:675
 msgid   "Can't get IOport state (unsupported?)"
 msgstr  ""
 
 #. GET binning should be AFTER setgeometry!
-#: ccdfunc.c:728
+#: ccdfunc.c:733
 msgid   "Can't get current binning"
 msgstr  ""
 
-#: ccdfunc.c:449
+#: ccdfunc.c:454
 msgid   "Can't get current focuser position"
 msgstr  ""
 
-#: ccdfunc.c:442
+#: ccdfunc.c:447
 msgid   "Can't get focuser limit positions"
 msgstr  ""
 
-#: ccdfunc.c:535
+#: ccdfunc.c:540
 msgid   "Can't get max wheel position"
 msgstr  ""
 
-#: ccdfunc.c:760 ccdfunc.c:780 ccdfunc.c:821
+#: ccdfunc.c:765 ccdfunc.c:785 ccdfunc.c:826
 msgid   "Can't grab image"
 msgstr  ""
 
-#: ccdfunc.c:467
+#: ccdfunc.c:472
 msgid   "Can't home focuser"
 msgstr  ""
 
@@ -117,108 +117,108 @@ msgstr  ""
 msgid   "Can't init mutex!"
 msgstr  ""
 
-#: client.c:145
+#: client.c:186
 msgid   "Can't make exposition"
 msgstr  ""
 
-#: ccdfunc.c:741
+#: ccdfunc.c:746
 msgid   "Can't open OpenGL window, image preview will be inaccessible"
 msgstr  ""
 
-#: ccdfunc.c:658
+#: ccdfunc.c:663
 #, c-format
 msgid   "Can't run shutter command %s (unsupported?)"
 msgstr  ""
 
 #. НС ΠΌΠΎΠ³Ρƒ ΡΠΎΡ…Ρ€Π°Π½ΠΈΡ‚ΡŒ Ρ„Π°ΠΉΠ»
-#: ccdfunc.c:179
+#: ccdfunc.c:180
 #, c-format
 msgid   "Can't save file with prefix %s"
 msgstr  ""
 
-#: ccdfunc.c:712
+#: ccdfunc.c:717
 #, c-format
 msgid   "Can't set %d flushes"
 msgstr  ""
 
-#: ccdfunc.c:676
+#: ccdfunc.c:681
 msgid   "Can't set IOport"
 msgstr  ""
 
-#: ccdfunc.c:649
+#: ccdfunc.c:654
 #, c-format
 msgid   "Can't set T to %g degC"
 msgstr  ""
 
-#: ccdfunc.c:624
+#: ccdfunc.c:629
 msgid   "Can't set active camera number"
 msgstr  ""
 
-#: ccdfunc.c:428
+#: ccdfunc.c:433
 msgid   "Can't set active focuser number"
 msgstr  ""
 
-#: ccdfunc.c:519
+#: ccdfunc.c:524
 msgid   "Can't set active wheel number"
 msgstr  ""
 
-#: ccdfunc.c:698 server.c:199
+#: ccdfunc.c:703 server.c:209
 #, c-format
 msgid   "Can't set binning %dx%d"
 msgstr  ""
 
-#: ccdfunc.c:722
+#: ccdfunc.c:727
 msgid   "Can't set bit depth"
 msgstr  ""
 
-#: ccdfunc.c:690
+#: ccdfunc.c:695
 #, c-format
 msgid   "Can't set brightness to %g"
 msgstr  ""
 
-#: ccdfunc.c:716
+#: ccdfunc.c:721
 #, c-format
 msgid   "Can't set exposure time to %f seconds"
 msgstr  ""
 
-#: ccdfunc.c:630
+#: ccdfunc.c:635
 msgid   "Can't set fan speed"
 msgstr  ""
 
-#: ccdfunc.c:684
+#: ccdfunc.c:689
 #, c-format
 msgid   "Can't set gain to %g"
 msgstr  ""
 
-#: ccdfunc.c:708 server.c:200
+#: ccdfunc.c:713 server.c:210
 msgid   "Can't set given geometry"
 msgstr  ""
 
-#: ccdfunc.c:469
+#: ccdfunc.c:474
 #, c-format
 msgid   "Can't set position %g"
 msgstr  ""
 
-#: ccdfunc.c:463
+#: ccdfunc.c:468
 #, c-format
 msgid   "Can't set position %g: out of limits [%g, %g]"
 msgstr  ""
 
-#: ccdfunc.c:724
+#: ccdfunc.c:729
 msgid   "Can't set readout speed"
 msgstr  ""
 
-#: ccdfunc.c:546
+#: ccdfunc.c:551
 #, c-format
 msgid   "Can't set wheel position %d"
 msgstr  ""
 
-#: ccdfunc.c:750 server.c:108
+#: ccdfunc.c:755 server.c:118
 msgid   "Can't start exposition"
 msgstr  ""
 
 #. Π—Π°Ρ…Π²Π°Ρ‚ ΠΊΠ°Π΄Ρ€Π° %d\n
-#: ccdfunc.c:748
+#: ccdfunc.c:753
 #, c-format
 msgid   "Capture frame %d"
 msgstr  ""
@@ -232,11 +232,11 @@ msgstr  ""
 msgid   "Equalization of histogram: %s"
 msgstr  ""
 
-#: ccdfunc.c:338
+#: ccdfunc.c:343
 msgid   "Error saving file"
 msgstr  ""
 
-#: ccdfunc.c:646
+#: ccdfunc.c:651
 #, c-format
 msgid   "Field of view: %s"
 msgstr  ""
@@ -246,26 +246,26 @@ msgstr  ""
 msgid   "File saved as '%s'"
 msgstr  ""
 
-#: ccdfunc.c:386
+#: ccdfunc.c:391
 msgid   "Focuser device not pointed"
 msgstr  ""
 
-#: ccdfunc.c:620
+#: ccdfunc.c:625
 #, c-format
 msgid   "Found %d cameras, you point number %d"
 msgstr  ""
 
-#: ccdfunc.c:424
+#: ccdfunc.c:429
 #, c-format
 msgid   "Found %d focusers, you point number %d"
 msgstr  ""
 
-#: ccdfunc.c:515
+#: ccdfunc.c:520
 #, c-format
 msgid   "Found %d wheels, you point number %d"
 msgstr  ""
 
-#: ccdfunc.c:643
+#: ccdfunc.c:648
 #, c-format
 msgid   "Full array: %s"
 msgstr  ""
@@ -275,7 +275,7 @@ msgstr  ""
 msgid   "Histogram conversion: %s"
 msgstr  ""
 
-#: ccdfunc.c:378
+#: ccdfunc.c:383
 #, c-format
 msgid   "Image stat:\n"
 msgstr  ""
@@ -284,27 +284,27 @@ msgstr  ""
 msgid   "N flushes before exposing (default: 1)"
 msgstr  ""
 
-#: ccdfunc.c:160
+#: ccdfunc.c:161
 msgid   "Neither filename nor filename prefix pointed!"
 msgstr  ""
 
-#: server.c:146
+#: server.c:156
 msgid   "No camera device"
 msgstr  ""
 
-#: ccdfunc.c:584 ccdfunc.c:585
+#: ccdfunc.c:589 ccdfunc.c:590
 msgid   "No cameras found"
 msgstr  ""
 
-#: ccdfunc.c:393
+#: ccdfunc.c:398
 msgid   "No focusers found"
 msgstr  ""
 
-#: ccdfunc.c:484
+#: ccdfunc.c:489
 msgid   "No wheels found"
 msgstr  ""
 
-#: ccdfunc.c:726
+#: ccdfunc.c:731
 msgid   "Only show statistics"
 msgstr  ""
 
@@ -312,52 +312,52 @@ msgstr  ""
 msgid   "PID file (default: "
 msgstr  ""
 
-#: ccdfunc.c:637
+#: ccdfunc.c:642
 #, c-format
 msgid   "Pixel size: %g x %g"
 msgstr  ""
 
-#: ccdfunc.c:757
+#: ccdfunc.c:762
 msgid   "Read grabbed image"
 msgstr  ""
 
-#: ccdfunc.c:725
+#: ccdfunc.c:730
 #, c-format
 msgid   "Readout mode: %s"
 msgstr  ""
 
-#: client.c:155
+#: client.c:216
 msgid   "Server timeout"
 msgstr  ""
 
-#: ccdfunc.c:689
+#: ccdfunc.c:694
 #, c-format
 msgid   "Set brightness to %g"
 msgstr  ""
 
-#: ccdfunc.c:631
+#: ccdfunc.c:636
 #, c-format
 msgid   "Set fan speed to %d"
 msgstr  ""
 
-#: ccdfunc.c:683
+#: ccdfunc.c:688
 #, c-format
 msgid   "Set gain to %g"
 msgstr  ""
 
-#: ccdfunc.c:656
+#: ccdfunc.c:661
 #, c-format
 msgid   "Shutter command: %s\n"
 msgstr  ""
 
 #. "ΠŸΠΎΠΏΡ‹Ρ‚ΠΊΠ° ΡΠΊΠΎΠ½Ρ„ΠΈΠ³ΡƒΡ€ΠΈΡ€ΠΎΠ²Π°Ρ‚ΡŒ ΠΏΠΎΡ€Ρ‚ I/O ΠΊΠ°ΠΊ %d\n"
-#: ccdfunc.c:662
+#: ccdfunc.c:667
 #, c-format
 msgid   "Try to configure I/O port as %d"
 msgstr  ""
 
 #. "ΠŸΠΎΠΏΡ‹Ρ‚ΠΊΠ° записи %d Π² ΠΏΠΎΡ€Ρ‚ I/O\n"
-#: ccdfunc.c:674
+#: ccdfunc.c:679
 #, c-format
 msgid   "Try to write %d to I/O port"
 msgstr  ""
@@ -366,11 +366,11 @@ msgstr  ""
 msgid   "UNIX socket name"
 msgstr  ""
 
-#: ccdfunc.c:477
+#: ccdfunc.c:482
 msgid   "Wheel device not pointed"
 msgstr  ""
 
-#: ccdfunc.c:542
+#: ccdfunc.c:547
 #, c-format
 msgid   "Wheel position should be from 0 to %d"
 msgstr  ""
@@ -474,7 +474,7 @@ msgid   "move focuser to absolute position, mm"
 msgstr  ""
 
 #: cmdlnopts.c:92
-msgid   "move focuser to relative position, mm"
+msgid   "move focuser to relative position, mm (only for standalone)"
 msgstr  ""
 
 #: cmdlnopts.c:86
diff --git a/main.c b/main.c
index 83d3768..89e0263 100644
--- a/main.c
+++ b/main.c
@@ -40,7 +40,13 @@ static int isserver = FALSE;
 static pid_t childpid = 0;
 
 void signals(int signo){
+    signal(signo, SIG_IGN);
     if(childpid){ // master process
+        if(signo == SIGUSR1){ // kill child
+            kill(childpid, signo);
+            signal(signo, signals);
+            return;
+        }
         DBG("Master killed with sig=%d", signo);
         LOGWARN("Master killed with sig=%d", signo);
         if(!GP->client){
@@ -104,6 +110,7 @@ int main(int argc, char **argv){
     signal(SIGTERM, signals);
     signal(SIGHUP, SIG_IGN);
     signal(SIGTSTP, SIG_IGN);
+    signal(SIGUSR1, signals); // restart server
     // check for another running process in server and standalone mode
     if(!GP->client) check4running(self, GP->pidfile);
     if(!isserver && !GP->client){ // standalone mode
@@ -112,7 +119,6 @@ int main(int argc, char **argv){
         ccds();
         return 0;
     }
-
     LOGMSG("Started");
 #ifndef EBUG
     if(isserver){
diff --git a/server.c b/server.c
index 6c6e820..6b090ed 100644
--- a/server.c
+++ b/server.c
@@ -35,7 +35,7 @@ static _Atomic camera_state camstate = CAMERA_IDLE;
 #define FLAG_STARTCAPTURE       (1<<0)
 #define FLAG_CANCEL             (1<<1)
 static atomic_int camflags = 0, camfanspd = 0, confio = 0, nflushes;
-static char *outfile = NULL;
+static char *outfile = NULL, *lastfile = NULL; // current output file name/prefix; last name of saved file
 static pthread_mutex_t locmutex = PTHREAD_MUTEX_INITIALIZER; // mutex for wheel/camera/focuser functions
 static frameformat frmformatmax = {0}, curformat = {0}; // maximal format
 static void *camdev = NULL, *focdev = NULL, *wheeldev = NULL;
@@ -51,13 +51,17 @@ typedef struct{
 
 // cat | awk '{print "{ " $3 ", \"\" }," }' | sort
 strpair allcommands[] = {
+    { "8bit", "run in 8 bit mode instead of 16 bit" },
+    { "author", "FITS 'AUTHOR' field" },
     { "brightness", "camera brightness" },
     { "camdevno", "camera device number" },
     { "camlist", "list all connected cameras" },
     { "ccdfanspeed", "fan speed of camera" },
     { "confio", "camera IO configuration" },
+    { "dark", "don't open shutter @ exposure" },
     { "expstate", "get exposition state" },
     { "exptime", "exposition time" },
+    { "fastspeed", "fast readout speed" },
     { "filename", "save file with this name, like file.fits" },
     { "filenameprefix", "prefix of files, like ex (will be saved as exXXXX.fits)" },
     { "focdevno", "focuser device number" },
@@ -66,11 +70,17 @@ strpair allcommands[] = {
     { "format", "camera frame format (X0,Y0,X1,Y1)" },
     { "gain", "camera gain" },
     { "hbin", "horizontal binning" },
+    { "headerfiles", "add FITS records from these files (comma-separated list)" },
     { "help", "show this help" },
     { "info", "connected devices state" },
+    { "instrument", "FITS 'INSTRUME' field" },
     { "io", "get/set camera IO" },
     { "maxformat", "camera maximal available format" },
     { "nflushes", "camera number of preflushes" },
+    { "object", "FITS 'OBJECT' field" },
+    { "objtype", "FITS 'IMAGETYP' field" },
+    { "observer", "FITS 'OBSERVER' field" },
+    { "program", "FITS 'PROG-ID' field" },
     { "rewrite", "rewrite file (if give `filename`, not `filenameprefix`" },
     { "shutter", "camera shutter's operations" },
     { "tcold", "camera chip temperature" },
@@ -130,7 +140,7 @@ static inline void cameracapturestate(){ // capturing - wait for exposition ends
                 if(!camera->capture(&ima)) LOGERR("Can't capture image");
                 else{
                     calculate_stat(&ima);
-                    if(saveFITS(&ima)){
+                    if(saveFITS(&ima, &lastfile)){
                         camstate = CAMERA_FRAMERDY;
                         return;
                     }
@@ -278,12 +288,21 @@ static hresult exphandler(int fd, _U_ const char *key, const char *val){
     sendstrmessage(fd, buf);
     return RESULT_SILENCE;
 }
+// show last filename of saved FITS
+static hresult lastfnamehandler(int fd, _U_ const char *key, _U_ const char *val){
+    char buf[PATH_MAX+1];
+    pthread_mutex_lock(&locmutex);
+    snprintf(buf, PATH_MAX, CMD_LASTFNAME "=%s", lastfile);
+    sendstrmessage(fd, buf);
+    pthread_mutex_unlock(&locmutex);
+    return RESULT_SILENCE;
+}
 // filename setter/getter
 static hresult namehandler(int fd, _U_ const char *key, const char *val){
     char buf[PATH_MAX+1];
     if(val){
         pthread_mutex_lock(&locmutex);
-        char *path = makeabspath(val);
+        char *path = makeabspath(val, FALSE);
         if(!path){
             LOGERR("Can't create file '%s'", val);
             pthread_mutex_unlock(&locmutex);
@@ -305,7 +324,7 @@ static hresult nameprefixhandler(_U_ int fd, _U_ const char *key, const char *va
     char buf[PATH_MAX+1];
     if(val){
         pthread_mutex_lock(&locmutex);
-        char *path = makeabspath(val);
+        char *path = makeabspath(val, FALSE);
         if(!path){
             LOGERR("Can't create file '%s'", val);
             pthread_mutex_unlock(&locmutex);
@@ -567,6 +586,141 @@ static hresult tremainhandler(_U_ int fd, _U_ const char *key, _U_ const char *v
     sendstrmessage(fd, buf);
     return RESULT_SILENCE;
 }
+static hresult _8bithandler(int fd, _U_ const char *key, const char *val){
+    char buf[64];
+    if(val){
+        int s = atoi(val);
+        if(s != 0 && s != 1) return RESULT_BADVAL;
+        GP->_8bit = s;
+        s = !s;
+        if(!camera->setbitdepth(s)) return RESULT_FAIL;
+    }
+    snprintf(buf, 63, CMD_8BIT "=%d", GP->_8bit);
+    sendstrmessage(fd, buf);
+    return RESULT_SILENCE;
+}
+static hresult fastspdhandler(int fd, _U_ const char *key, const char *val){
+    char buf[64];
+    if(val){
+        int b = atoi(val);
+        if(b != 0 && b != 1) return RESULT_BADVAL;
+        GP->fast = b;
+        if(!camera->setfastspeed(b)) return RESULT_FAIL;
+    }
+    snprintf(buf, 63, CMD_FASTSPD "=%d", GP->fast);
+    sendstrmessage(fd, buf);
+    return RESULT_SILENCE;
+}
+static hresult darkhandler(int fd, _U_ const char *key, const char *val){
+    char buf[64];
+    if(val){
+        int d = atoi(val);
+        if(d != 0 && d != 1) return RESULT_BADVAL;
+        GP->dark = d;
+        d = !d;
+        if(!camera->setframetype(d)) return RESULT_FAIL;
+    }
+    snprintf(buf, 63, CMD_DARK "=%d", GP->dark);
+    sendstrmessage(fd, buf);
+    return RESULT_SILENCE;
+}
+static hresult FITSparhandler(int fd, const char *key, const char *val){
+    char buf[256], **fitskey = NULL;
+    if(0 == strcmp(key, CMD_AUTHOR)){
+        fitskey = &GP->author;
+    }else if(0 == strcmp(key, CMD_INSTRUMENT)){
+        fitskey = &GP->instrument;
+    }else if(0 == strcmp(key, CMD_OBSERVER)){
+        fitskey = &GP->observers;
+    }else if(0 == strcmp(key, CMD_OBJECT)){
+        fitskey = &GP->objname;
+    }else if(0 == strcmp(key, CMD_PROGRAM)){
+        fitskey = &GP->prog_id;
+    }else if(0 == strcmp(key, CMD_OBJTYPE)){
+        fitskey = &GP->objtype;
+    }else return RESULT_BADKEY;
+    if(val){
+        FREE(*fitskey);
+        *fitskey = strdup(val);
+    }
+    snprintf(buf, 255, "%s=%s", key, *fitskey);
+    sendstrmessage(fd, buf);
+    return RESULT_SILENCE;
+}
+static hresult FITSheaderhandler(int fd, _U_ const char *key, const char *val){
+    char buf[BUFSIZ], **sptr;
+    static char *curhdr = NULL;
+    static int firstrun = 1;
+    if(val){
+        int sz = 10, amount = 0;
+        pthread_mutex_lock(&locmutex);
+        // first we should check `val`
+        char b2[BUFSIZ], *bptr = buf;
+        snprintf(b2, BUFSIZ-1, "%s", val);
+        char **list = MALLOC(char*, sz), **lptr = list;
+        int L = BUFSIZ;
+        for(char *s = b2; ; s = NULL){
+            char *tok = strtok(s, ",;");
+            if(!tok){
+                *lptr = NULL;
+                break;
+            }
+            // check path
+            char *newpath = makeabspath(tok, TRUE);
+            DBG("next token: %s, path: %s", tok, newpath);
+            if(!newpath){ // error! Free list and return err
+                DBG("No such file");
+                sptr = list;
+                while(*sptr){
+                    FREE(*sptr++);
+                }
+                FREE(list);
+                pthread_mutex_unlock(&locmutex);
+                return RESULT_BADVAL;
+            }
+            *lptr++ = strdup(newpath);
+            if(++amount == sz){
+                DBG("Realloc");
+                sz += 10;
+                list = realloc(list, sz*sizeof(char*));
+                bzero(&list[sz-10], 10*sizeof(char*));
+            }
+            int N = snprintf(bptr, L-1, "%s,", newpath);
+            bptr += N; L -= N;
+        }
+        // free old list and change its value
+        if(GP->addhdr){
+            DBG("Free old list");
+            sptr = GP->addhdr;
+            while(*sptr){
+                DBG("Free %s", *sptr);
+                free(*(sptr++));
+            }
+        }
+        GP->addhdr = list;
+        FREE(curhdr);
+        if(*val && *val != ',') curhdr = strdup(buf);
+        DBG("curhdr now: %s", curhdr);
+        pthread_mutex_unlock(&locmutex);
+    }
+    if(!curhdr && firstrun){
+        firstrun = 0;
+        if(GP->addhdr && *GP->addhdr){
+            char *ptr = buf;
+            int L = BUFSIZ;
+            sptr = GP->addhdr;
+            while(*sptr){
+                DBG("Add to curhdr: %s", *sptr);
+                int N = snprintf(ptr, L-1, "%s,", *sptr++);
+                L -= N; ptr += N;
+            }
+            curhdr = strdup(buf);
+        }
+    }
+    snprintf(buf, BUFSIZ-1, CMD_HEADERFILES "=%s", curhdr);
+    sendstrmessage(fd, buf);
+    return RESULT_SILENCE;
+}
 /*
 static hresult handler(_U_ int fd, _U_ const char *key, _U_ const char *val){
     char buf[64];
@@ -790,10 +944,21 @@ static handleritem items[] = {
     {chkcam, formathandler, CMD_FRAMEFORMAT},
     {chkcam, formathandler, CMD_FRAMEMAX},
     {chkcam, nflusheshandler, CMD_NFLUSHES},
-    {chkcam, expstatehandler, CMD_EXPSTATE},
+    {chktrue, expstatehandler, CMD_EXPSTATE},
     {chkcam, nameprefixhandler, CMD_FILENAMEPREFIX},
     {chkcam, rewritefilehandler, CMD_REWRITE},
+    {chkcam, _8bithandler, CMD_8BIT},
+    {chkcam, fastspdhandler, CMD_FASTSPD},
+    {chkcam, darkhandler, CMD_DARK},
     {chktrue, tremainhandler, CMD_TREMAIN},
+    {chktrue, FITSparhandler, CMD_AUTHOR},
+    {chktrue, FITSparhandler, CMD_INSTRUMENT},
+    {chktrue, FITSparhandler, CMD_OBSERVER},
+    {chktrue, FITSparhandler, CMD_OBJECT},
+    {chktrue, FITSparhandler, CMD_PROGRAM},
+    {chktrue, FITSparhandler, CMD_OBJTYPE},
+    {chktrue, FITSheaderhandler, CMD_HEADERFILES},
+    {chktrue, lastfnamehandler, CMD_LASTFNAME},
     {chkfoc, foclisthandler, CMD_FOCLIST},
     {chkfoc, fsetNhandler, CMD_FDEVNO},
     {chkfoc, fgotohandler, CMD_FGOTO},
@@ -878,13 +1043,20 @@ void server(int sock){
     closecam(camdev);
 }
 
-char *makeabspath(const char *path){
+/**
+ * @brief makeabspath - convert path to absolute and check it
+ * @param path - path to file
+ * @param shoulbe - ==1 if file must exists
+ * @return abs path or NULL (if can't convert, can't create or file not exists)
+ */
+char *makeabspath(const char *path, int shouldbe){
     static char buf[PATH_MAX+1];
     if(!path) return NULL;
     char *ret = NULL;
     int unl = 0;
     FILE *f = fopen(path, "r");
     if(!f){
+        if(shouldbe) return NULL;
         f = fopen(path, "a");
         if(!f){
             WARN("Can't create %s", path);
diff --git a/server.h b/server.h
index 9175ad2..676fe52 100644
--- a/server.h
+++ b/server.h
@@ -32,7 +32,7 @@ typedef enum{
 
 // server-side functions
 void server(int fd);
-char *makeabspath(const char *path);
+char *makeabspath(const char *path, int shouldbe);
 
 // common information about everything
 #define CMD_INFO        "info"
@@ -42,6 +42,7 @@ char *makeabspath(const char *path);
 #define CMD_CAMLIST     "camlist"
 #define CMD_CAMDEVNO    "camdevno"
 #define CMD_EXPOSITION  "exptime"
+#define CMD_LASTFNAME   "lastfilename"
 #define CMD_FILENAME    "filename"
 #define CMD_FILENAMEPREFIX "filenameprefix"
 // rewrite=1 will rewrite files, =0 - not (only for `filename`)
@@ -61,6 +62,17 @@ char *makeabspath(const char *path);
 // expstate=CAMERA_CAPTURE will start exposition, CAMERA_IDLE - cancel
 #define CMD_EXPSTATE    "expstate"
 #define CMD_TREMAIN     "tremain"
+#define CMD_8BIT        "8bit"
+#define CMD_FASTSPD     "fastspeed"
+#define CMD_DARK        "dark"
+// FITS file keywords
+#define CMD_AUTHOR      "author"
+#define CMD_INSTRUMENT  "instrument"
+#define CMD_OBSERVER    "observer"
+#define CMD_OBJECT      "object"
+#define CMD_PROGRAM     "program"
+#define CMD_OBJTYPE     "objtype"
+#define CMD_HEADERFILES "headerfiles"
 
 // focuser
 #define CMD_FOCLIST     "foclist"