1 files changed, 78 insertions, 0 deletions
diff --git a/libcrystfel/src/mosflm.c b/libcrystfel/src/mosflm.c
index 4cf21103..7ebf6e19 100644
--- a/libcrystfel/src/mosflm.c
+++ b/libcrystfel/src/mosflm.c
@@ -821,6 +821,12 @@ void *mosflm_prepare(IndexingMethod *indm, UnitCell *cell)
 {
 	struct mosflm_private *mp;
 
+	if ( mosflm_probe(cell) == NULL ) {
+		ERROR("Mosflm does not appear to run properly.\n");
+		ERROR("Please check your Mosflm installation.\n");
+		return NULL;
+	}
+
 	/* Flags that MOSFLM knows about */
 	*indm &= INDEXING_METHOD_MASK
 	       | INDEXING_USE_LATTICE_TYPE | INDEXING_USE_CELL_PARAMETERS;
@@ -841,3 +847,75 @@ void mosflm_cleanup(void *pp)
 	p = (struct mosflm_private *)pp;
 	free(p);
 }
+
+
+static void chop_word(char *s)
+{
+	int i;
+	size_t l = strlen(s);
+	for ( i=0; i<l; i++ ) {
+		if ( s[i] == ' ' ) {
+			s[i] = '\0';
+			return;
+		}
+	}
+}
+
+
+const char *mosflm_probe(UnitCell *cell)
+{
+	pid_t pid;
+	int pty;
+	int status;
+	FILE *fh;
+	char line[1024];
+	int ok = 0;
+	int l;
+
+	pid = forkpty(&pty, NULL, NULL, NULL);
+	if ( pid == -1 ) {
+		return NULL;
+	}
+	if ( pid == 0 ) {
+
+		/* Child process */
+		struct termios t;
+
+		/* Turn echo off */
+		tcgetattr(STDIN_FILENO, &t);
+		t.c_lflag &= ~(ECHO | ECHOE | ECHOK | ECHONL);
+		tcsetattr(STDIN_FILENO, TCSANOW, &t);
+
+		execlp("mosflm", "mosflm", (char *)NULL);
+		execlp("ipmosflm", "ipmosflm", (char *)NULL);
+		_exit(1);
+
+	}
+
+	fh = fdopen(pty, "r");
+
+	for ( l=0; l<10; l++ ) {
+		char *pos;
+		if ( fgets(line, 1024, fh) == NULL ) {
+			ERROR("Failed to probe for Mosflm\n");
+		} else {
+			pos = strstr(line, "Mosflm version ");
+			if ( pos != NULL ) {
+				char *vers = pos+15;
+				ok = 1;
+				chop_word(vers);
+				/* FIXME: Set capabilities based on version */
+			}
+		}
+	}
+
+	fclose(fh);
+	close(pty);
+	waitpid(pid, &status, 0);
+
+	if ( !ok ) return NULL;
+
+	if ( cell_has_parameters(cell) ) return "mosflm-cell-nolatt,mosflm-latt-nocell";
+	if ( cell != NULL ) return "mosflm-latt-nocell";
+	return "mosflm-nolatt-nocell";
+}