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/*
* 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 "ioctl_iocdef.h"
struct ioctlent {
const char *info;
const char *name;
unsigned int dir;
unsigned int type_nr;
unsigned int size;
};
static int
is_prefix(const char *s1, const char *s2)
{
size_t len = strlen(s1);
if (len > strlen(s2))
return 0;
return !memcmp(s1, s2, len);
}
static int
compare_name_info(const void *a, const void *b)
{
int rc;
const char *name1 = ((struct ioctlent *) a)->name;
const char *name2 = ((struct ioctlent *) b)->name;
const char *info1 = ((struct ioctlent *) a)->info;
const char *info2 = ((struct ioctlent *) b)->info;
rc = strcmp(name1, name2);
if (rc)
return rc;
/*
* 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 strcmp(info1, info2);
}
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;
qsort(ioctls, nioctls, sizeof(ioctls[0]), compare_name_info);
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;
}
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