Make the return value a char *' instead of a const char *'.

1998-12-09  Martin Baulig  <martin@home-of-linux.org>

	* include/glibtop/procargs.h (glibtop_get_proc_args): Make the
	return value a `char *' instead of a `const char *'.

sysdeps/linux/procargs.c

@@ -24,7 +24,8 @@
 #include <glibtop/xmalloc.h>
 #include <glibtop/procargs.h>
 
-static const unsigned long _glibtop_sysdeps_proc_args = 0;
+static const unsigned long _glibtop_sysdeps_proc_args =
+(1 << GLIBTOP_PROC_ARGS_SIZE);
 
 /* Init function. */
 
@@ -36,10 +37,55 @@ glibtop_init_proc_args_s (glibtop *server)
 
 /* Provides detailed information about a process. */
 
-const char *
+char *
 glibtop_get_proc_args_s (glibtop *server, glibtop_proc_args *buf,
 			 pid_t pid, unsigned max_len)
 {
+	char fn [BUFSIZ], buffer [BUFSIZ];
+	int cmdline, len, total = 0;
+	char *retval = NULL;
+
+	glibtop_init_s (&server, GLIBTOP_SYSDEPS_PROC_ARGS, 0);
+	
 	memset (buf, 0, sizeof (glibtop_proc_args));
-	return NULL;
+
+	sprintf (fn, "/proc/%d/cmdline", pid);
+	
+	cmdline = open (fn, O_RDONLY);
+	if (cmdline < 0) return NULL;
+
+	if (max_len) {
+		retval = glibtop_malloc_r (server, max_len+1);
+
+		len = read (cmdline, retval, max_len);
+		if (len < 0) {
+			glibtop_free_r (server, retval);
+			return NULL;
+		}
+		
+		return retval;
+	}
+
+	while (1) {
+		len = read (cmdline, buffer, BUFSIZ-1);
+		if (len < 0) {
+			glibtop_free_r (server, retval);
+			return NULL;
+		}
+
+		if (len == 0)
+			break;
+
+		retval = glibtop_realloc_r (server, retval, total+len+1);
+		memcpy (retval+total, buffer, len);
+		*(retval+total+len) = 0;
+		total += len;
+	}
+	
+	close (cmdline);
+
+	buf->size = total;
+	buf->flags = _glibtop_sysdeps_proc_args;
+	
+	return retval;
 }