Add isc_file_progname(), with trivial POSIX implementation, and

call it from main().  A separate WIN32 implementation will be needed.

bin/named/main.c

@@ -15,7 +15,7 @@
  * WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  */
 
-/* $Id: main.c,v 1.108 2001/05/08 03:42:28 gson Exp $ */
+/* $Id: main.c,v 1.109 2001/05/08 19:47:53 gson Exp $ */
 
 #include <config.h>
 
@@ -26,6 +26,7 @@
 #include <isc/app.h>
 #include <isc/commandline.h>
 #include <isc/entropy.h>
+#include <isc/file.h>
 #include <isc/os.h>
 #include <isc/platform.h>
 #include <isc/resource.h>
@@ -62,7 +63,7 @@
 /* #include "xxdb.h" */
 
 static isc_boolean_t	want_stats = ISC_FALSE;
-static const char *	program_name = "named";
+static char		program_name[256] = "named";
 static char    		saved_command_line[512];
 
 void
@@ -264,21 +265,9 @@ static void
 parse_command_line(int argc, char *argv[]) {
 	int ch;
 	int port;
-	char *s;
 
 	save_command_line(argc, argv);
 
-	/*
-	 * See if we should run as lwresd.
-	 */
-	s = strrchr(argv[0], '/');
-	if (s == NULL)
-		s = argv[0];
-	else
-		s++;
-	if (strcmp(s, "lwresd") == 0)
-		ns_g_lwresdonly = ISC_TRUE;
-
 	isc_commandline_errprint = ISC_FALSE;
 	while ((ch = isc_commandline_parse(argc, argv,
 					   "c:C:d:fgi:ln:N:p:P:st:u:vx:")) !=
@@ -517,7 +506,13 @@ int
 main(int argc, char *argv[]) {
 	isc_result_t result;
 
-	program_name = argv[0];
+	result = isc_file_progname(argv[0], program_name, sizeof(program_name));
+	if (result != ISC_R_SUCCESS)
+		ns_main_earlyfatal("program name too long");
+
+	if (strcmp(program_name, "lwresd") == 0)
+		ns_g_lwresdonly = ISC_TRUE;
+
 	isc_assertion_setcallback(assertion_failed);
 	isc_error_setfatal(library_fatal_error);
 	isc_error_setunexpected(library_unexpected_error);

lib/isc/include/isc/file.h

@@ -15,7 +15,7 @@
  * WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  */
 
-/* $Id: file.h,v 1.17 2001/05/05 02:47:19 bwelling Exp $ */
+/* $Id: file.h,v 1.18 2001/05/08 19:47:54 gson Exp $ */
 
 #ifndef ISC_FILE_H
 #define ISC_FILE_H 1
@@ -183,6 +183,22 @@ isc_file_basename(const char *filename);
  * Return the final component of the path in the file name.
  */
 
+isc_result_t
+isc_file_progname(const char *filename, char *buf, size_t buflen);
+/*
+ * Given an operating system specific file name "filename"
+ * referring to a program, return the canonical program name. 
+ * Any directory prefix or executable file name extension (if
+ * used on the OS in case) is stripped.  On systems where program
+ * names are case insensitive, the name is canonicalized to all
+ * lower case.  The name is written to 'buf', an array of 'buflen'
+ * chars, and null terminated.
+ *
+ * Returns:
+ *	ISC_R_SUCCESS
+ *	ISC_R_NOSPACE 	The name did not fit in 'buf'.
+ */
+
 isc_result_t
 isc_file_template(const char *path, const char *templet, char *buf,
 		  size_t buflen);

lib/isc/unix/file.c

@@ -15,7 +15,7 @@
  * WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  */
 
-/* $Id: file.c,v 1.32 2001/05/05 02:47:21 bwelling Exp $ */
+/* $Id: file.c,v 1.33 2001/05/08 19:47:55 gson Exp $ */
 
 #include <config.h>
 
@@ -244,3 +244,13 @@ isc_file_basename(const char *filename) {
 		return (filename);
 	return (s + 1);
 }
+
+isc_result_t
+isc_file_progname(const char *filename, char *buf, size_t buflen) {
+	const char *base = isc_file_basename(filename);
+	size_t len = strlen(base) + 1;
+	if (len > buflen)
+		return (ISC_R_NOSPACE);
+	memcpy(buf, base, len);
+	return (ISC_R_SUCCESS);
+}