2005-04-16 18:20:36 -04:00
|
|
|
#ifndef _LINUX_STRING_H_
|
|
|
|
#define _LINUX_STRING_H_
|
|
|
|
|
2008-11-02 09:51:27 -05:00
|
|
|
/* We don't want strings.h stuff being used by user stuff by accident */
|
2005-04-16 18:20:36 -04:00
|
|
|
|
2007-10-31 00:44:00 -04:00
|
|
|
#ifndef __KERNEL__
|
|
|
|
#include <string.h>
|
|
|
|
#else
|
2005-04-16 18:20:36 -04:00
|
|
|
|
|
|
|
#include <linux/compiler.h> /* for inline */
|
|
|
|
#include <linux/types.h> /* for size_t */
|
|
|
|
#include <linux/stddef.h> /* for NULL */
|
|
|
|
|
2006-03-24 06:18:42 -05:00
|
|
|
extern char *strndup_user(const char __user *, long);
|
|
|
|
|
2005-04-16 18:20:36 -04:00
|
|
|
/*
|
|
|
|
* 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_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_STRNICMP
|
|
|
|
extern int strnicmp(const char *, const char *, __kernel_size_t);
|
|
|
|
#endif
|
2007-03-29 04:18:42 -04:00
|
|
|
#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
|
2005-04-16 18:20:36 -04:00
|
|
|
#ifndef __HAVE_ARCH_STRCHR
|
|
|
|
extern char * strchr(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
|
2006-06-23 05:05:44 -04:00
|
|
|
extern char * strstrip(char *);
|
2005-04-16 18:20:36 -04:00
|
|
|
#ifndef __HAVE_ARCH_STRSTR
|
|
|
|
extern char * strstr(const char *,const char *);
|
|
|
|
#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
|
2006-04-11 01:53:57 -04:00
|
|
|
#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
|
2005-04-16 18:20:36 -04:00
|
|
|
|
|
|
|
#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
|
|
|
|
|
2005-10-07 02:46:04 -04:00
|
|
|
extern char *kstrdup(const char *s, gfp_t gfp);
|
2007-07-17 21:37:02 -04:00
|
|
|
extern char *kstrndup(const char *s, size_t len, gfp_t gfp);
|
[PATCH] kmemdup: introduce
One of idiomatic ways to duplicate a region of memory is
dst = kmalloc(len, GFP_KERNEL);
if (!dst)
return -ENOMEM;
memcpy(dst, src, len);
which is neat code except a programmer needs to write size twice. Which
sometimes leads to mistakes. If len passed to kmalloc is smaller that len
passed to memcpy, it's straight overwrite-beyond-end. If len passed to
memcpy is smaller than len passed to kmalloc, it's either a) legit
behaviour ;-), or b) cloned buffer will contain garbage in second half.
Slight trolling of commit lists shows several duplications bugs
done exactly because of diverged lenghts:
Linux:
[CRYPTO]: Fix memcpy/memset args.
[PATCH] memcpy/memset fixes
OpenBSD:
kerberosV/src/lib/asn1: der_copy.c:1.4
If programmer is given only one place to play with lengths, I believe, such
mistakes could be avoided.
With kmemdup, the snippet above will be rewritten as:
dst = kmemdup(src, len, GFP_KERNEL);
if (!dst)
return -ENOMEM;
This also leads to smaller code (kzalloc effect). Quick grep shows
200+ places where kmemdup() can be used.
Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-10-01 02:27:20 -04:00
|
|
|
extern void *kmemdup(const void *src, size_t len, gfp_t gfp);
|
2005-06-23 03:09:02 -04:00
|
|
|
|
2007-07-17 21:37:02 -04:00
|
|
|
extern char **argv_split(gfp_t gfp, const char *str, int *argcp);
|
|
|
|
extern void argv_free(char **argv);
|
|
|
|
|
2008-05-01 07:34:42 -04:00
|
|
|
extern bool sysfs_streq(const char *s1, const char *s2);
|
|
|
|
|
2008-07-24 00:26:44 -04:00
|
|
|
extern ssize_t memory_read_from_buffer(void *to, size_t count, loff_t *ppos,
|
|
|
|
const void *from, size_t available);
|
|
|
|
|
2005-04-16 18:20:36 -04:00
|
|
|
#endif
|
|
|
|
#endif /* _LINUX_STRING_H_ */
|