399 строки
12 KiB
C
399 строки
12 KiB
C
#ifndef _LINUX_STRING_H_
|
|
#define _LINUX_STRING_H_
|
|
|
|
|
|
#include <linux/compiler.h> /* for inline */
|
|
#include <linux/types.h> /* for size_t */
|
|
#include <linux/stddef.h> /* for NULL */
|
|
#include <stdarg.h>
|
|
#include <uapi/linux/string.h>
|
|
|
|
extern char *strndup_user(const char __user *, long);
|
|
extern void *memdup_user(const void __user *, size_t);
|
|
extern void *memdup_user_nul(const void __user *, size_t);
|
|
|
|
/*
|
|
* Include machine specific inline routines
|
|
*/
|
|
#include <asm/string.h>
|
|
|
|
#ifndef __HAVE_ARCH_STRCPY
|
|
extern char * strcpy(char *,const char *);
|
|
#endif
|
|
#ifndef __HAVE_ARCH_STRNCPY
|
|
extern char * strncpy(char *,const char *, __kernel_size_t);
|
|
#endif
|
|
#ifndef __HAVE_ARCH_STRLCPY
|
|
size_t strlcpy(char *, const char *, size_t);
|
|
#endif
|
|
#ifndef __HAVE_ARCH_STRSCPY
|
|
ssize_t __must_check strscpy(char *, const char *, size_t);
|
|
#endif
|
|
#ifndef __HAVE_ARCH_STRCAT
|
|
extern char * strcat(char *, const char *);
|
|
#endif
|
|
#ifndef __HAVE_ARCH_STRNCAT
|
|
extern char * strncat(char *, const char *, __kernel_size_t);
|
|
#endif
|
|
#ifndef __HAVE_ARCH_STRLCAT
|
|
extern size_t strlcat(char *, const char *, __kernel_size_t);
|
|
#endif
|
|
#ifndef __HAVE_ARCH_STRCMP
|
|
extern int strcmp(const char *,const char *);
|
|
#endif
|
|
#ifndef __HAVE_ARCH_STRNCMP
|
|
extern int strncmp(const char *,const char *,__kernel_size_t);
|
|
#endif
|
|
#ifndef __HAVE_ARCH_STRCASECMP
|
|
extern int strcasecmp(const char *s1, const char *s2);
|
|
#endif
|
|
#ifndef __HAVE_ARCH_STRNCASECMP
|
|
extern int strncasecmp(const char *s1, const char *s2, size_t n);
|
|
#endif
|
|
#ifndef __HAVE_ARCH_STRCHR
|
|
extern char * strchr(const char *,int);
|
|
#endif
|
|
#ifndef __HAVE_ARCH_STRCHRNUL
|
|
extern char * strchrnul(const char *,int);
|
|
#endif
|
|
#ifndef __HAVE_ARCH_STRNCHR
|
|
extern char * strnchr(const char *, size_t, int);
|
|
#endif
|
|
#ifndef __HAVE_ARCH_STRRCHR
|
|
extern char * strrchr(const char *,int);
|
|
#endif
|
|
extern char * __must_check skip_spaces(const char *);
|
|
|
|
extern char *strim(char *);
|
|
|
|
static inline __must_check char *strstrip(char *str)
|
|
{
|
|
return strim(str);
|
|
}
|
|
|
|
#ifndef __HAVE_ARCH_STRSTR
|
|
extern char * strstr(const char *, const char *);
|
|
#endif
|
|
#ifndef __HAVE_ARCH_STRNSTR
|
|
extern char * strnstr(const char *, const char *, size_t);
|
|
#endif
|
|
#ifndef __HAVE_ARCH_STRLEN
|
|
extern __kernel_size_t strlen(const char *);
|
|
#endif
|
|
#ifndef __HAVE_ARCH_STRNLEN
|
|
extern __kernel_size_t strnlen(const char *,__kernel_size_t);
|
|
#endif
|
|
#ifndef __HAVE_ARCH_STRPBRK
|
|
extern char * strpbrk(const char *,const char *);
|
|
#endif
|
|
#ifndef __HAVE_ARCH_STRSEP
|
|
extern char * strsep(char **,const char *);
|
|
#endif
|
|
#ifndef __HAVE_ARCH_STRSPN
|
|
extern __kernel_size_t strspn(const char *,const char *);
|
|
#endif
|
|
#ifndef __HAVE_ARCH_STRCSPN
|
|
extern __kernel_size_t strcspn(const char *,const char *);
|
|
#endif
|
|
|
|
#ifndef __HAVE_ARCH_MEMSET
|
|
extern void * memset(void *,int,__kernel_size_t);
|
|
#endif
|
|
#ifndef __HAVE_ARCH_MEMCPY
|
|
extern void * memcpy(void *,const void *,__kernel_size_t);
|
|
#endif
|
|
#ifndef __HAVE_ARCH_MEMMOVE
|
|
extern void * memmove(void *,const void *,__kernel_size_t);
|
|
#endif
|
|
#ifndef __HAVE_ARCH_MEMSCAN
|
|
extern void * memscan(void *,int,__kernel_size_t);
|
|
#endif
|
|
#ifndef __HAVE_ARCH_MEMCMP
|
|
extern int memcmp(const void *,const void *,__kernel_size_t);
|
|
#endif
|
|
#ifndef __HAVE_ARCH_MEMCHR
|
|
extern void * memchr(const void *,int,__kernel_size_t);
|
|
#endif
|
|
#ifndef __HAVE_ARCH_MEMCPY_MCSAFE
|
|
static inline __must_check int memcpy_mcsafe(void *dst, const void *src,
|
|
size_t cnt)
|
|
{
|
|
memcpy(dst, src, cnt);
|
|
return 0;
|
|
}
|
|
#endif
|
|
#ifndef __HAVE_ARCH_MEMCPY_FLUSHCACHE
|
|
static inline void memcpy_flushcache(void *dst, const void *src, size_t cnt)
|
|
{
|
|
memcpy(dst, src, cnt);
|
|
}
|
|
#endif
|
|
void *memchr_inv(const void *s, int c, size_t n);
|
|
char *strreplace(char *s, char old, char new);
|
|
|
|
extern void kfree_const(const void *x);
|
|
|
|
extern char *kstrdup(const char *s, gfp_t gfp) __malloc;
|
|
extern const char *kstrdup_const(const char *s, gfp_t gfp);
|
|
extern char *kstrndup(const char *s, size_t len, gfp_t gfp);
|
|
extern void *kmemdup(const void *src, size_t len, gfp_t gfp);
|
|
extern char *kmemdup_nul(const char *s, size_t len, gfp_t gfp);
|
|
|
|
extern char **argv_split(gfp_t gfp, const char *str, int *argcp);
|
|
extern void argv_free(char **argv);
|
|
|
|
extern bool sysfs_streq(const char *s1, const char *s2);
|
|
extern int kstrtobool(const char *s, bool *res);
|
|
static inline int strtobool(const char *s, bool *res)
|
|
{
|
|
return kstrtobool(s, res);
|
|
}
|
|
|
|
int match_string(const char * const *array, size_t n, const char *string);
|
|
int __sysfs_match_string(const char * const *array, size_t n, const char *s);
|
|
|
|
/**
|
|
* sysfs_match_string - matches given string in an array
|
|
* @_a: array of strings
|
|
* @_s: string to match with
|
|
*
|
|
* Helper for __sysfs_match_string(). Calculates the size of @a automatically.
|
|
*/
|
|
#define sysfs_match_string(_a, _s) __sysfs_match_string(_a, ARRAY_SIZE(_a), _s)
|
|
|
|
#ifdef CONFIG_BINARY_PRINTF
|
|
int vbin_printf(u32 *bin_buf, size_t size, const char *fmt, va_list args);
|
|
int bstr_printf(char *buf, size_t size, const char *fmt, const u32 *bin_buf);
|
|
int bprintf(u32 *bin_buf, size_t size, const char *fmt, ...) __printf(3, 4);
|
|
#endif
|
|
|
|
extern ssize_t memory_read_from_buffer(void *to, size_t count, loff_t *ppos,
|
|
const void *from, size_t available);
|
|
|
|
/**
|
|
* strstarts - does @str start with @prefix?
|
|
* @str: string to examine
|
|
* @prefix: prefix to look for.
|
|
*/
|
|
static inline bool strstarts(const char *str, const char *prefix)
|
|
{
|
|
return strncmp(str, prefix, strlen(prefix)) == 0;
|
|
}
|
|
|
|
size_t memweight(const void *ptr, size_t bytes);
|
|
void memzero_explicit(void *s, size_t count);
|
|
|
|
/**
|
|
* kbasename - return the last part of a pathname.
|
|
*
|
|
* @path: path to extract the filename from.
|
|
*/
|
|
static inline const char *kbasename(const char *path)
|
|
{
|
|
const char *tail = strrchr(path, '/');
|
|
return tail ? tail + 1 : path;
|
|
}
|
|
|
|
#define __FORTIFY_INLINE extern __always_inline __attribute__((gnu_inline))
|
|
#define __RENAME(x) __asm__(#x)
|
|
|
|
void fortify_panic(const char *name) __noreturn __cold;
|
|
void __read_overflow(void) __compiletime_error("detected read beyond size of object passed as 1st parameter");
|
|
void __read_overflow2(void) __compiletime_error("detected read beyond size of object passed as 2nd parameter");
|
|
void __write_overflow(void) __compiletime_error("detected write beyond size of object passed as 1st parameter");
|
|
|
|
#if !defined(__NO_FORTIFY) && defined(__OPTIMIZE__) && defined(CONFIG_FORTIFY_SOURCE)
|
|
__FORTIFY_INLINE char *strncpy(char *p, const char *q, __kernel_size_t size)
|
|
{
|
|
size_t p_size = __builtin_object_size(p, 0);
|
|
if (__builtin_constant_p(size) && p_size < size)
|
|
__write_overflow();
|
|
if (p_size < size)
|
|
fortify_panic(__func__);
|
|
return __builtin_strncpy(p, q, size);
|
|
}
|
|
|
|
__FORTIFY_INLINE char *strcat(char *p, const char *q)
|
|
{
|
|
size_t p_size = __builtin_object_size(p, 0);
|
|
if (p_size == (size_t)-1)
|
|
return __builtin_strcat(p, q);
|
|
if (strlcat(p, q, p_size) >= p_size)
|
|
fortify_panic(__func__);
|
|
return p;
|
|
}
|
|
|
|
__FORTIFY_INLINE __kernel_size_t strlen(const char *p)
|
|
{
|
|
__kernel_size_t ret;
|
|
size_t p_size = __builtin_object_size(p, 0);
|
|
if (p_size == (size_t)-1)
|
|
return __builtin_strlen(p);
|
|
ret = strnlen(p, p_size);
|
|
if (p_size <= ret)
|
|
fortify_panic(__func__);
|
|
return ret;
|
|
}
|
|
|
|
extern __kernel_size_t __real_strnlen(const char *, __kernel_size_t) __RENAME(strnlen);
|
|
__FORTIFY_INLINE __kernel_size_t strnlen(const char *p, __kernel_size_t maxlen)
|
|
{
|
|
size_t p_size = __builtin_object_size(p, 0);
|
|
__kernel_size_t ret = __real_strnlen(p, maxlen < p_size ? maxlen : p_size);
|
|
if (p_size <= ret && maxlen != ret)
|
|
fortify_panic(__func__);
|
|
return ret;
|
|
}
|
|
|
|
/* defined after fortified strlen to reuse it */
|
|
extern size_t __real_strlcpy(char *, const char *, size_t) __RENAME(strlcpy);
|
|
__FORTIFY_INLINE size_t strlcpy(char *p, const char *q, size_t size)
|
|
{
|
|
size_t ret;
|
|
size_t p_size = __builtin_object_size(p, 0);
|
|
size_t q_size = __builtin_object_size(q, 0);
|
|
if (p_size == (size_t)-1 && q_size == (size_t)-1)
|
|
return __real_strlcpy(p, q, size);
|
|
ret = strlen(q);
|
|
if (size) {
|
|
size_t len = (ret >= size) ? size - 1 : ret;
|
|
if (__builtin_constant_p(len) && len >= p_size)
|
|
__write_overflow();
|
|
if (len >= p_size)
|
|
fortify_panic(__func__);
|
|
__builtin_memcpy(p, q, len);
|
|
p[len] = '\0';
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
/* defined after fortified strlen and strnlen to reuse them */
|
|
__FORTIFY_INLINE char *strncat(char *p, const char *q, __kernel_size_t count)
|
|
{
|
|
size_t p_len, copy_len;
|
|
size_t p_size = __builtin_object_size(p, 0);
|
|
size_t q_size = __builtin_object_size(q, 0);
|
|
if (p_size == (size_t)-1 && q_size == (size_t)-1)
|
|
return __builtin_strncat(p, q, count);
|
|
p_len = strlen(p);
|
|
copy_len = strnlen(q, count);
|
|
if (p_size < p_len + copy_len + 1)
|
|
fortify_panic(__func__);
|
|
__builtin_memcpy(p + p_len, q, copy_len);
|
|
p[p_len + copy_len] = '\0';
|
|
return p;
|
|
}
|
|
|
|
__FORTIFY_INLINE void *memset(void *p, int c, __kernel_size_t size)
|
|
{
|
|
size_t p_size = __builtin_object_size(p, 0);
|
|
if (__builtin_constant_p(size) && p_size < size)
|
|
__write_overflow();
|
|
if (p_size < size)
|
|
fortify_panic(__func__);
|
|
return __builtin_memset(p, c, size);
|
|
}
|
|
|
|
__FORTIFY_INLINE void *memcpy(void *p, const void *q, __kernel_size_t size)
|
|
{
|
|
size_t p_size = __builtin_object_size(p, 0);
|
|
size_t q_size = __builtin_object_size(q, 0);
|
|
if (__builtin_constant_p(size)) {
|
|
if (p_size < size)
|
|
__write_overflow();
|
|
if (q_size < size)
|
|
__read_overflow2();
|
|
}
|
|
if (p_size < size || q_size < size)
|
|
fortify_panic(__func__);
|
|
return __builtin_memcpy(p, q, size);
|
|
}
|
|
|
|
__FORTIFY_INLINE void *memmove(void *p, const void *q, __kernel_size_t size)
|
|
{
|
|
size_t p_size = __builtin_object_size(p, 0);
|
|
size_t q_size = __builtin_object_size(q, 0);
|
|
if (__builtin_constant_p(size)) {
|
|
if (p_size < size)
|
|
__write_overflow();
|
|
if (q_size < size)
|
|
__read_overflow2();
|
|
}
|
|
if (p_size < size || q_size < size)
|
|
fortify_panic(__func__);
|
|
return __builtin_memmove(p, q, size);
|
|
}
|
|
|
|
extern void *__real_memscan(void *, int, __kernel_size_t) __RENAME(memscan);
|
|
__FORTIFY_INLINE void *memscan(void *p, int c, __kernel_size_t size)
|
|
{
|
|
size_t p_size = __builtin_object_size(p, 0);
|
|
if (__builtin_constant_p(size) && p_size < size)
|
|
__read_overflow();
|
|
if (p_size < size)
|
|
fortify_panic(__func__);
|
|
return __real_memscan(p, c, size);
|
|
}
|
|
|
|
__FORTIFY_INLINE int memcmp(const void *p, const void *q, __kernel_size_t size)
|
|
{
|
|
size_t p_size = __builtin_object_size(p, 0);
|
|
size_t q_size = __builtin_object_size(q, 0);
|
|
if (__builtin_constant_p(size)) {
|
|
if (p_size < size)
|
|
__read_overflow();
|
|
if (q_size < size)
|
|
__read_overflow2();
|
|
}
|
|
if (p_size < size || q_size < size)
|
|
fortify_panic(__func__);
|
|
return __builtin_memcmp(p, q, size);
|
|
}
|
|
|
|
__FORTIFY_INLINE void *memchr(const void *p, int c, __kernel_size_t size)
|
|
{
|
|
size_t p_size = __builtin_object_size(p, 0);
|
|
if (__builtin_constant_p(size) && p_size < size)
|
|
__read_overflow();
|
|
if (p_size < size)
|
|
fortify_panic(__func__);
|
|
return __builtin_memchr(p, c, size);
|
|
}
|
|
|
|
void *__real_memchr_inv(const void *s, int c, size_t n) __RENAME(memchr_inv);
|
|
__FORTIFY_INLINE void *memchr_inv(const void *p, int c, size_t size)
|
|
{
|
|
size_t p_size = __builtin_object_size(p, 0);
|
|
if (__builtin_constant_p(size) && p_size < size)
|
|
__read_overflow();
|
|
if (p_size < size)
|
|
fortify_panic(__func__);
|
|
return __real_memchr_inv(p, c, size);
|
|
}
|
|
|
|
extern void *__real_kmemdup(const void *src, size_t len, gfp_t gfp) __RENAME(kmemdup);
|
|
__FORTIFY_INLINE void *kmemdup(const void *p, size_t size, gfp_t gfp)
|
|
{
|
|
size_t p_size = __builtin_object_size(p, 0);
|
|
if (__builtin_constant_p(size) && p_size < size)
|
|
__read_overflow();
|
|
if (p_size < size)
|
|
fortify_panic(__func__);
|
|
return __real_kmemdup(p, size, gfp);
|
|
}
|
|
|
|
/* defined after fortified strlen and memcpy to reuse them */
|
|
__FORTIFY_INLINE char *strcpy(char *p, const char *q)
|
|
{
|
|
size_t p_size = __builtin_object_size(p, 0);
|
|
size_t q_size = __builtin_object_size(q, 0);
|
|
if (p_size == (size_t)-1 && q_size == (size_t)-1)
|
|
return __builtin_strcpy(p, q);
|
|
memcpy(p, q, strlen(q) + 1);
|
|
return p;
|
|
}
|
|
|
|
#endif
|
|
|
|
#endif /* _LINUX_STRING_H_ */
|