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--- gnuplot-4.0.0.orig/src/term.c
+++ gnuplot-4.0.0/src/term.c
@@ -1278,6 +1278,33 @@
return (t);
}
+#ifdef X11
+int
+x11driver_found()
+{
+ char *binname = "/gnuplot_x11";
+ char *fullname;
+ struct stat buf;
+
+ fullname = (char*)malloc(sizeof(X11_DRIVER_DIR) + sizeof(binname) + 1);
+ strcat(fullname, X11_DRIVER_DIR);
+ strcat(fullname, binname);
+
+ /* exists? */
+ if (stat(fullname, &buf)) {
+ free(fullname);
+ return 0;
+ }
+
+ free(fullname);
+ /* executable? */
+ if (buf.st_mode && S_IXOTH)
+ return 1;
+
+ return 0;
+}
+#endif
+
/*
* Routine to detect what terminal is being used (or do anything else
* that would be nice). One anticipated (or allowed for) side effect
@@ -1356,12 +1383,18 @@
env_term = getenv("TERM"); /* try $TERM */
if (term_name == (char *) NULL
&& env_term != (char *) NULL && strcmp(env_term, "xterm") == 0)
- term_name = "x11";
+ term_name = "x11";
display = getenv("DISPLAY");
if (term_name == (char *) NULL && display != (char *) NULL)
- term_name = "x11";
+ term_name = "x11";
if (X11_Display)
- term_name = "x11";
+ term_name = "x11";
+ /* if x11 was selected check for driver */
+ if (term_name && (strcmp(term_name, "x11") == 0) && !x11driver_found() && isatty(fileno(stdin))) {
+ printf("*** X11 output driver not found, switching to dumb terminal!\n");
+ printf("*** If you want to use the X11 output, please install the ""gnuplot-x11"" package\n");
+ term_name = "dumb";
+ };
#endif /* x11 */
#ifdef AMIGA
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