Update copyright headers

[strace] / ioctlsort.c

diff --git a/ioctlsort.c b/ioctlsort.c
index f0f5744ed32b5622fe50835acdc87563c5e786bf..b090d16201efec296989b505a651061f6effd710 100644 (file)
--- a/ioctlsort.c
+++ b/ioctlsort.c
@@ -1,58 +1,145 @@
+/*
+ * Copyright (c) 2001 Wichert Akkerman <wichert@cistron.nl>
+ * Copyright (c) 2004-2015 Dmitry V. Levin <ldv@altlinux.org>
+ * Copyright (c) 1999-2018 The strace developers.
+ * All rights reserved.
+ *
+ * SPDX-License-Identifier: LGPL-2.1-or-later
+ */
+
+#ifdef HAVE_CONFIG_H
+# include "config.h"
+#endif
+
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
-#include <sys/types.h>
-#include <stdint.h>
 
-#include <asm/ioctl.h>
-#include <linux/types.h>
-
-#include "ioctldefs.h"
-#include <linux/atmioc.h>
+#include "ioctl_iocdef.h"
 
 struct ioctlent {
-       const char*     header;
-       const char*     name;
-       unsigned int    code;
+       const char *info;
+       const char *name;
+       unsigned int dir;
+       unsigned int type_nr;
+       unsigned int size;
 };
 
-struct ioctlent ioctls[] = {
-#include "ioctls.h"
-};
+static int
+is_prefix(const char *s1, const char *s2)
+{
+       size_t len = strlen(s1);
 
-int nioctls = sizeof(ioctls) / sizeof(ioctls[0]);
+       if (len > strlen(s2))
+               return 0;
+       return !memcmp(s1, s2, len);
+}
+
+static int
+compare_name_info(const void *a, const void *b)
+{
+       int rc;
 
-int compare(const void* a, const void* b) {
-       unsigned int code1 = ((struct ioctlent *) a)->code;
-       unsigned int code2 = ((struct ioctlent *) b)->code;
        const char *name1 = ((struct ioctlent *) a)->name;
        const char *name2 = ((struct ioctlent *) b)->name;
-       return (code1 > code2) ? 1 : (code1 < code2) ? -1 : strcmp(name1, name2);
-}
+       const char *info1 = ((struct ioctlent *) a)->info;
+       const char *info2 = ((struct ioctlent *) b)->info;
 
-static int is_not_prefix(const char *s1, const char *s2) {
-       size_t len = strlen(s1);
+       rc = strcmp(name1, name2);
+       if (rc)
+               return rc;
 
-       if (len > strlen(s2))
+       /*
+        * exception from lexicographical order:
+        * "asm/" < "asm-generic/"
+        */
+       if (is_prefix("asm/", info1) &&
+           is_prefix("asm-generic/", info2))
+               return -1;
+
+       if (is_prefix("asm/", info2) &&
+           is_prefix("asm-generic/", info1))
                return 1;
-       return memcmp(s1, s2, len);
+
+       return strcmp(info1, info2);
 }
 
-int main(int argc, char** argv) {
-       int i;
+static unsigned int
+code(const struct ioctlent *e)
+{
+       return e->type_nr |
+               (e->size << _IOC_SIZESHIFT) |
+               (e->dir << _IOC_DIRSHIFT);
+}
+
+static int
+compare_code_name(const void *a, const void *b)
+{
+       unsigned int code1 = code((struct ioctlent *) a);
+       unsigned int code2 = code((struct ioctlent *) b);
+       const char *name1 = ((struct ioctlent *) a)->name;
+       const char *name2 = ((struct ioctlent *) b)->name;
+       return (code1 > code2) ?
+               1 : (code1 < code2) ? -1 : strcmp(name1, name2);
+}
+
+static void
+ioctlsort(struct ioctlent *ioctls, size_t nioctls)
+{
+       size_t i;
 
-       /* ioctl_lookup() only looks at the NR and TYPE bits atm. */
-       for (i = 0; i < nioctls; i++)
-               ioctls[i].code &= (_IOC_NRMASK << _IOC_NRSHIFT) |
-                                 (_IOC_TYPEMASK << _IOC_TYPESHIFT);
+       qsort(ioctls, nioctls, sizeof(ioctls[0]), compare_name_info);
 
-       qsort(ioctls, nioctls, sizeof(ioctls[0]), compare);
-       puts("\t/* Generated by ioctlsort */");
-       for (i = 0; i < nioctls; i++)
-               if (i == 0 || ioctls[i-1].code != ioctls[i].code ||
-                   is_not_prefix(ioctls[i-1].name, ioctls[i].name))
-                       printf("\t{\"%s\",\t\"%s\",\t%#06x},\n",
-                               ioctls[i].header, ioctls[i].name, ioctls[i].code);
+       for (i = 1; i < nioctls; ++i)
+               if (!strcmp(ioctls[i-1].name, ioctls[i].name)) {
+                       /*
+                        * If there are multiple definitions for the same
+                        * name, keep the first one and mark all the rest
+                        * for deletion.
+                        */
+                       ioctls[i].info = NULL;
+               }
+
+       for (i = 1; i < nioctls; ++i)
+               if (!ioctls[i].info) {
+                       /*
+                        * Change ioctl code of marked elements
+                        * to make them sorted to the end of array.
+                        */
+                       ioctls[i].dir =
+                       ioctls[i].type_nr =
+                       ioctls[i].size = 0xffffffffu;
+               }
+
+       qsort(ioctls, nioctls, sizeof(ioctls[0]), compare_code_name);
+
+       puts("/* Generated by ioctlsort. */");
+       for (i = 0; i < nioctls; ++i) {
+               if (!ioctls[i].info) {
+                       /*
+                        * We've reached the first element marked for deletion.
+                        */
+                       break;
+               }
+               if (i == 0 || code(&ioctls[i-1]) != code(&ioctls[i]) ||
+                   !is_prefix(ioctls[i-1].name, ioctls[i].name))
+                       printf("{ \"%s\", %#010x },\n",
+                               ioctls[i].name, code(ioctls+i));
+       }
+}
+
+static struct ioctlent ioctls[] = {
+#ifdef IOCTLSORT_INC
+# include IOCTLSORT_INC
+#else
+# include "ioctls_arch.h"
+# include "ioctls_inc.h"
+#endif
+};
 
+int
+main(void)
+{
+       ioctlsort(ioctls, sizeof(ioctls) / sizeof(ioctls[0]));
        return 0;
 }