Linux/unix: added support for BSD-style printing, that is, using lpq/lpr instead of lpstat/lp .

git-svn-id: file:///fltk/svn/fltk/branches/branch-1.3@10619 ea41ed52-d2ee-0310-a9c1-e6b18d33e121

src/Fl_PostScript.cxx

@@ -1561,7 +1561,7 @@ int Fl_PostScript_Printer::start_job(int pages, int *firstpage, int *lastpage) {
 
   // first test version for print dialog
   if (!print_panel) make_print_panel();
-  print_load();
+  printing_style style = print_load();
   print_selection->deactivate();
   print_all->setonly();
   print_all->do_callback();
@@ -1635,9 +1635,10 @@ int Fl_PostScript_Printer::start_job(int pages, int *firstpage, int *lastpage) {
   // Print: pipe the output into the lp command...
 
   char command[1024];
-  snprintf(command, sizeof(command), "lp -s -d %s -n %d -t '%s' -o media=%s",
-             printer, print_collate_button->value() ? 1 : (int)(print_copies->value() + 0.5),
-	     "FLTK", media);
+  if (style == SystemV) snprintf(command, sizeof(command), "lp -s -d %s -n %d -t '%s' -o media=%s",
+        printer, print_collate_button->value() ? 1 : (int)(print_copies->value() + 0.5), "FLTK", media);
+  else snprintf(command, sizeof(command), "lpr -h -P %s -# %d -T FLTK ",
+                printer, print_collate_button->value() ? 1 : (int)(print_copies->value() + 0.5));
 
   Fl_PostScript_Graphics_Driver *ps = driver();
   ps->output = popen(command, "w");

src/print_panel.cxx

@@ -513,10 +513,11 @@ void print_cb(Fl_Return_Button *, void *) {
   print_panel->hide();
 }
 
-void print_load() {
+printing_style print_load() { // return whether SystemV or BSD printing style is used
   FILE *lpstat;
-  char line[1024], name[1024], *nptr, qname[2048], *qptr, defname[1024];
+  char line[1024], name[1024], *nptr, qname[2048], *qptr, defname[1024], *p;
   int i;
+  printing_style style = SystemV;
 
   if (print_choice->size() > 1) {
     for (i = 1; print_choice->text(i); i ++) {
@@ -531,8 +532,8 @@ void print_load() {
   print_start = 0;
 
   defname[0] = '\0';
-
-  if ((lpstat = popen("LC_MESSAGES=C LANG=C lpstat -p -d", "r")) != NULL) {
+// get names of all printers and of default one
+  if ((lpstat = popen("LC_MESSAGES=C LANG=C /bin/sh -c '(lpstat -p -d ) 2>&-'", "r")) != NULL) { // try first with SystemV printing system
     while (fgets(line, sizeof(line), lpstat)) {
       if (!strncmp(line, "printer ", 8) &&
           sscanf(line + 8, "%s", name) == 1) {
@@ -548,18 +549,40 @@ void print_load() {
     }
     pclose(lpstat);
   }
+  fclose(stderr);
+  
+  if (print_choice->size() == 2 && (lpstat = fopen("/etc/printcap", "r"))) { // try next with BSD printing system
+    while (fgets(line, sizeof(line),lpstat)) { // get names of all known printers
+      if (*line == '#' || (p = strchr(line, '|')) == NULL) continue;
+      *p = 0;
+      print_choice->add(line, 0, 0, (void *)strdup(line), 0);
+      style = BSD;
+      *p = '|';
+      while (1) {
+        p = line + strlen(line) - 1;
+        if (*p == '\n' && p > line) p--;
+        if (*p != '\\') break;
+        fgets(line, sizeof(line),lpstat);
+      }
+    }
+    fclose(lpstat);
+    p = getenv("PRINTER"); // get name of default printer
+    if (p == NULL) p = (char*)"lp";
+    strcpy(defname, p);
+  }
 
-  if (defname[0]) {
+  if (print_choice->size() > 2) print_choice->value(1);
+  if (defname[0]) { // select default printer in menu
     for (i = 1; print_choice->text(i); i ++) {
       if (!strcmp((char *)print_choice->menu()[i].user_data(), defname)) {
         print_choice->value(i);
         break;
       }
     }
-  } else if (print_choice->size() > 2) print_choice->value(1);
+  }
 
   print_update_status();
-
+  return style;
 } // print_load()
 
 void print_update_status() {
@@ -568,14 +591,21 @@ void print_update_status() {
   static char status[1024];
   const char *printer = (const char *)print_choice->menu()[print_choice->value()].user_data();
 
+  status[0] = 0;
   if (print_choice->value()) {
-    snprintf(command, sizeof(command), "lpstat -p '%s'", printer);
-    if ((lpstat = popen(command, "r")) != NULL) {
-      if (fgets(status, sizeof(status), lpstat)==0) { /* ignore */ }
-      pclose(lpstat);
-    } else strcpy(status, "printer status unavailable");
-  } else status[0] = '\0';
-
+    strcpy(status, "printer status unavailable");
+    snprintf(command, sizeof(command), "/bin/sh -c \"(lpstat -p '%s' ) 2>&-\" ", printer); // try first with SystemV printing system
+    if ((lpstat = popen(command, "r")) !=  NULL) {
+      if (fgets(status, sizeof(status), lpstat) == 0) { // if no reply
+        pclose(lpstat);
+        snprintf(command, sizeof(command), "lpq -P%s", printer); // try next with BSD printing system
+        if ((lpstat = popen(command, "r")) !=  NULL) {
+          fgets(status, sizeof(status), lpstat);
+        }
+      }
+    pclose(lpstat);
+    }
+  }
   print_status->label(status);
 
   char name[1024];

src/print_panel.h

@@ -35,9 +35,10 @@
 #include <FL/Fl_Check_Button.H>
 #include <FL/Fl_Return_Button.H>
 #include <FL/Fl_Progress.H>
+enum printing_style {SystemV, BSD};
 static Fl_Double_Window* make_print_panel();
 static void print_cb(Fl_Return_Button *, void *); 
-static void print_load();
+static printing_style print_load();
 static void print_update_status();
 #endif