svn commit: trunk/busybox/applets

[vda at busybox.net]

Author: vda
Date: 2007-11-27 22:49:42 -0800 (Tue, 27 Nov 2007)
New Revision: 20556

Log:
forgotten part of previous commit



Added:
   trunk/busybox/applets/applet_tables.c


Changeset:
Added: trunk/busybox/applets/applet_tables.c
===================================================================
--- trunk/busybox/applets/applet_tables.c	                        (rev 0)
+++ trunk/busybox/applets/applet_tables.c	2007-11-28 06:49:42 UTC (rev 20556)
@@ -0,0 +1,94 @@
+/* vi: set sw=4 ts=4: */
+/*
+ * Applet table generator.
+ * Runs on host and produces include/applet_tables.h
+ *
+ * Copyright (C) 2007 Denys Vlasenko <vda.linux at googlemail.com>
+ *
+ * Licensed under GPLv2, see file License in this tarball for details.
+ */
+
+#include <stdlib.h>
+#include <string.h>
+#include <stdio.h>
+
+#include "../include/autoconf.h"
+#include "../include/busybox.h"
+
+struct bb_applet {
+	const char *name;
+	const char *main;
+	enum bb_install_loc_t install_loc;
+	enum bb_suid_t need_suid;
+	/* true if instead of fork(); exec("applet"); waitpid();
+	 * one can do fork(); exit(applet_main(argc,argv)); waitpid(); */
+	unsigned char noexec;
+	/* Even nicer */
+	/* true if instead of fork(); exec("applet"); waitpid();
+	 * one can simply call applet_main(argc,argv); */
+	unsigned char nofork;
+};
+
+/* Define struct bb_applet applets[] */
+#include "../include/applets.h"
+
+enum { NUM_APPLETS = sizeof(applets)/sizeof(applets[0]) };
+
+static int offset[NUM_APPLETS];
+
+static int cmp_name(const void *a, const void *b)
+{
+	const struct bb_applet *aa = a;
+	const struct bb_applet *bb = b;
+	return strcmp(aa->name, bb->name);
+}
+
+int main(int argc, char **argv)
+{
+	int i;
+	int ofs;
+
+	qsort(applets, NUM_APPLETS, sizeof(applets[0]), cmp_name);
+
+	/* Keep in sync with include/busybox.h! */
+
+	puts("const char applet_names[] ALIGN1 =");
+	ofs = 0;
+	i = 0;
+	for (i = 0; i < NUM_APPLETS; i++) {
+		offset[i] = ofs;
+		ofs += strlen(applets[i].name) + 1;
+		printf("\"%s\" \"\\0\"\n", applets[i].name);
+	}
+	puts(";");
+
+	puts("int (*const applet_mains[])(int argc, char **argv) = {");
+	for (i = 0; i < NUM_APPLETS; i++) {
+		printf("%s_main,\n", applets[i].main);
+	}
+	puts("};");
+
+#if ENABLE_FEATURE_INSTALLER || ENABLE_FEATURE_PREFER_APPLETS
+	puts("const uint32_t applet_nameofs[] = {");
+#else
+	puts("const uint16_t applet_nameofs[] ALIGN2 = {");
+#endif
+	for (i = 0; i < NUM_APPLETS; i++) {
+		printf("0x%08x,\n",
+			offset[i]
+#if ENABLE_FEATURE_SUID
+			+ (applets[i].need_suid   << 14) /* 2 bits */
+#endif
+#if ENABLE_FEATURE_INSTALLER
+			+ (applets[i].install_loc << 16) /* 3 bits */
+#endif
+#if ENABLE_FEATURE_PREFER_APPLETS
+			+ (applets[i].nofork << 19)
+			+ (applets[i].noexec << 20)
+#endif
+		);
+	}
+	puts("};");
+
+	return 0;
+}