add heater commands and fits-header creation

Daemons/teldaemon_astrosib/header.c

@@ -0,0 +1,141 @@
+/*
+ * This file is part of the teldaemon project.
+ * Copyright 2026 Edward V. Emelianov <edward.emelianoff@gmail.com>.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <limits.h>
+#include <string.h>
+#include <sys/stat.h>
+#include <usefull_macros.h>
+
+#include "header.h"
+#include "socket.h"
+
+static char *headername = NULL;
+static char *telescope_name = NULL;
+static header_mask_t header_mask = {0};
+
+static int printhdr(int fd, const char *key, const char *val, const char *cmnt){
+    char tmp[81];
+    char tk[9];
+    if(strlen(key) > 8){
+        snprintf(tk, 8, "%s", key);
+        key = tk;
+    }
+    if(cmnt){
+        snprintf(tmp, 81, "%-8s= %-21s / %s", key,  val, cmnt);
+    }else{
+        snprintf(tmp, 81, "%-8s= %s", key, val);
+    }
+    size_t l = strlen(tmp);
+    tmp[l] = '\n';
+    ++l;
+    if(write(fd, tmp, l) != (ssize_t)l){
+        WARN("write()");
+        return 1;
+    }
+    return 0;
+}
+
+// return TRUE if can write to given header file
+int header_create(const char *file, int flags){
+    if(!file || flags < 0 || flags > 0xff) return FALSE;
+    FILE *hf = fopen(file, "w");
+    if(!hf) return FALSE;
+    unlink(file);
+    if(headername) FREE(headername);
+    headername = strdup(file);
+    header_mask.flags = (uint8_t)flags;
+    return TRUE;
+}
+
+// set given `name` for telescope name
+void telname(const char *name){
+    if(telescope_name) FREE(telescope_name);
+    if(name){
+        int l = strlen(name) + 3;
+        telescope_name = MALLOC(char, l);
+        snprintf(telescope_name, l-1, "'%s'", name);
+    }
+}
+
+// return static buffer with help
+const char *getheadermaskhelp(){
+    return
+        "0 - telescope name\n"
+        "1 - focuser status\n"
+        "2 - cooler status\n"
+        "3 - heater status\n"
+        "4 - external temperature\n"
+        "5 - mirror temperature\n"
+        "6 - measured time\n"
+    ;
+}
+
+void write_header(){
+    if(!headername || !header_mask.flags) return;
+    char aname[PATH_MAX];
+    char val[22];
+    telstatus_t st;
+#define WRHDR(k, v, c)  do{if(printhdr(fd, k, v, c)){goto returning;}}while(0)
+    snprintf(aname, PATH_MAX-1, "%sXXXXXX", headername);
+    int fd = mkstemp(aname);
+    if(fd < 0){
+        LOGWARN("Can't write header file: mkstemp()");
+        return;
+    }
+    fchmod(fd, 0644);
+
+    if(get_telescope_data(&st)) WRHDR("OPERATIO", "'FORBIDDEN'", "Observations are forbidden");
+    if(header_mask.telname && telescope_name) WRHDR("TELESCOP", telescope_name, "Telescope name");
+    if(header_mask.fosuser){
+        snprintf(val, 21, "%d", st.focuserpos);
+        WRHDR("FOCUS", val, "Current focuser position");
+    }
+    if(header_mask.cooler){
+        snprintf(val, 21, "%d", st.cooler);
+        WRHDR("COOLER", val, "Primary mirror cooler status: 0/1 (off/on)");
+    }
+    if(header_mask.heater){
+        snprintf(val, 21, "%d", st.heater);
+        WRHDR("HEATER", val, "Secondary mirror heater status: 0/1 (off/on)");
+    }
+    if(header_mask.exttemp){
+        snprintf(val, 21, "%.1f", st.ambienttemp);
+        WRHDR("TDOME", val, "In-dome temperature, degC");
+    }
+    if(header_mask.mirtemp){
+        snprintf(val, 21, "%.1f", st.mirrortemp);
+        WRHDR("TMIRROR", val, "Mirror temperature, degC");
+    }
+    if(header_mask.meastime){
+        snprintf(val, 21, "%.3f", st.stattime);
+        char timebuf[BUFSIZ];
+        time_t t = (time_t) st.stattime;
+        struct tm *tmp;
+        tmp = localtime(&t);
+        if(!tmp || 0 == strftime(timebuf, BUFSIZ, "Measurement time: %F %T", tmp)){
+            LOGERR("localtime() returned NULL");
+            goto returning;
+        }
+        WRHDR("TMEAS", val, timebuf);
+
+    }
+#undef WRHDR
+returning:
+    close(fd);
+    rename(aname, headername);
+}