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#define _GNU_SOURCE /* mempcpy */
#include <assert.h> /* assert */
#include <dlfcn.h> /* dlsym, RTLD_NEXT */
#include <stddef.h> /* NULL, size_t */
#include <stdint.h> /* SIZE_MAX */
#include <stdlib.h> /* rand_r */
#define strerror_r no_strerror_r
#include <string.h> /* memcpy, strcpy, strncat, strndup */
#undef strerror_r
#include <time.h> /* time */
#include <unistd.h> /* getpid */
#include "alias.h" /* weak_alias */
/**
* Copy bytes in memory, with buffer overflow checking.
*
* LSB 5.0: LSB-Core-generic/baselib---memcpy-chk-1.html
*/
void *__memcpy_chk(void *dest, const void *src, size_t n, size_t destlen)
{
assert(dest != NULL);
assert(src != NULL);
assert(destlen >= n);
if (dest < src) {
assert((char *) dest + n <= (char *) src);
} else {
assert((char *) src + n <= (char *) dest);
}
return memcpy(dest, src, n);
}
/**
* Copy bytes in memory with overlapping areas, with buffer overflow checking.
*
* LSB 5.0: LSB-Core-generic/baselib---memmove-chk-1.html
*/
void *__memmove_chk(void *dest, const void *src, size_t n, size_t destlen)
{
assert(dest != NULL);
assert(src != NULL);
assert(destlen >= n);
return memmove(dest, src, n);
}
/**
* Copy bytes in memory.
*
* LSB 5.0: LSB-Core-generic/baselib---mempcpy.html
*/
void *__mempcpy(void *dest, const void *src, size_t n)
{
return mempcpy(dest, src, n);
}
/**
* Copy bytes in memory, with buffer overflow checking.
*
* LSB 5.0: LSB-Core-generic/baselib---mempcpy-chk-1.html
*/
void *__mempcpy_chk(void *dest, const void *src, size_t n, size_t destlen)
{
assert(dest != NULL);
assert(src != NULL);
assert(destlen >= n);
if (dest < src) {
assert((char *) dest + n <= (char *) src);
} else {
assert((char *) src + n <= (char *) dest);
}
return mempcpy(dest, src, n);
}
/**
* Set bytes in memory, with buffer overflow checking.
*
* LSB 5.0: LSB-Core-generic/baselib---memset-chk-1.html
*/
void *__memset_chk(void *s, int c, size_t n, size_t buflen)
{
assert(s != NULL);
assert(buflen >= n);
return memset(s, c, n);
}
void __explicit_bzero_chk(void *s, size_t n, size_t buflen)
{
assert(s != NULL);
assert(buflen >= n);
explicit_bzero(s, n);
}
/**
* Find byte in memory.
*
* LSB 5.0: LSB-Core-generic/baselib---rawmemchr.html
*/
void *__rawmemchr(const void *s, int c)
{
return memchr(s, c, SIZE_MAX);
}
weak_alias(__rawmemchr, rawmemchr);
/**
* Copy a string and return a pointer to the end of the result, with buffer
* overflow checking.
*
* LSB 5.0: LSB-Core-generic/baselib---stpcpy-chk-1.html
*/
char *__stpcpy_chk(char *dest, const char *src, size_t destlen)
{
size_t n;
assert(dest != NULL);
assert(src != NULL);
n = strlen(src) + 1;
assert(destlen >= n);
if (dest < src) {
assert(dest + n <= src);
} else {
assert(src + n <= dest);
}
return stpcpy(dest, src);
}
/**
* Copy a fixed-length string, returning a pointer to the array end, with buffer
* overflow checking.
*
* LSB 5.0: LSB-Core-generic/baselib---stpncpy-chk-1.html
*/
char *__stpncpy_chk(char *dest, const char *src, size_t n, size_t destlen)
{
assert(dest != NULL);
assert(src != NULL);
assert(destlen >= n);
if (dest < src) {
assert(dest + n <= src);
} else {
assert(src + n <= dest);
}
return stpncpy(dest, src, n);
}
/**
* Concatenate two strings, with buffer overflow checking.
*
* LSB 5.0: LSB-Core-generic/baselib---strcat-chk-1.html
*/
char *__strcat_chk(char *dest, const char *src, size_t destlen)
{
size_t n;
size_t total;
assert(dest != NULL);
assert(src != NULL);
n = strlen(src) + 1;
total = strnlen(dest, destlen) + n;
assert(destlen >= total);
if (dest < src) {
assert(dest + total <= src);
} else {
assert(src + n <= dest);
}
return strcat(dest, src);
}
/**
* Copy a string, with buffer overflow checking.
*
* LSB 5.0: LSB-Core-generic/baselib---strcpy-chk-1.html
*/
char *__strcpy_chk(char *dest, const char *src, size_t destlen)
{
size_t n;
assert(dest != NULL);
assert(src != NULL);
n = strlen(src) + 1;
assert(destlen >= n);
if (dest < src) {
assert(dest + n <= src);
} else {
assert(src + n <= dest);
}
return strcpy(dest, src);
}
/**
* Find the substring length of a string that does not have any two characters.
*
* Not defined in LSB 5.0. Used by spotify-client.
*/
size_t __strcspn_c2(const char *str, int bad, int bad2)
{
size_t length = 0;
const char *s = str;
while (*s != bad && *s != bad2 && *s != '\0') {
length++;
s++;
}
return length;
}
/**
* Alias for strdup.
*
* LSB 5.0: LSB-Core-generic/baselib---strdup-1.html
*/
char *__strdup(const char *string)
{
return strdup(string);
}
/**
* Non-POSIX strerror_r.
*/
static int (*real_strerror_r)(int, char *, size_t);
char *strerror_r(int errnum, char *buf, size_t buflen)
{
if (real_strerror_r == NULL) {
real_strerror_r = dlsym(RTLD_NEXT, "strerror_r");
assert(real_strerror_r);
}
real_strerror_r(errnum, buf, buflen);
return buf;
}
/**
* Concatenate a string with part of another, with buffer overflow checking.
*
* LSB 5.0: LSB-Core-generic/baselib---strncat-chk-1.html
*/
char *__strncat_chk(char *dest, const char *src, size_t n, size_t destlen)
{
size_t total;
assert(dest != NULL);
assert(src != NULL);
total = strnlen(dest, destlen) + n + 1;
assert(destlen >= total);
if (dest < src) {
assert(dest + total <= src);
} else {
assert(src + n <= dest);
}
return strncat(dest, src, n);
}
/**
* Copy a fixed-length string, with buffer overflow checking.
*
* LSB 5.0: LSB-Core-generic/baselib---strncpy-chk-1.html
*/
char *__strncpy_chk(char *dest, const char *src, size_t n, size_t destlen)
{
assert(dest != NULL);
assert(src != NULL);
assert(destlen >= n);
if (dest < src) {
assert(dest + n <= src);
} else {
assert(src + n <= dest);
}
return strncpy(dest, src, n);
}
/**
* Duplicate a specific number of bytes from a string.
*/
char *__strndup(const char *s, size_t size)
{
return strndup(s, size);
}
/**
* Extract token from string.
*
* The "global" definition of strsep in glibc, used when architecture dependent
* assembler versions aren't good enough.
*/
char *__strsep_g(char **stringp, const char *delim)
{
return strsep(stringp, delim);
}
/**
* Split string into tokens.
*
* LSB 5.0: LSB-Core-generic/baselib---strtok-r-1.html
*/
char *__strtok_r(char *s, const char *delim, char **save_ptr)
{
return strtok_r(s, delim, save_ptr);
}
void *memfrob(void *s, size_t n)
{
unsigned char *c = s;
while (n--)
*c++ ^= 42;
return s;
}
char *strfry(char *s)
{
static unsigned int seed;
size_t len = strlen(s);
if (!len)
return s;
seed += time(NULL) ^ getpid() ^ (uintptr_t) s;
for (size_t i = 0; i < len - 1; ++i) {
size_t j = rand_r(&seed) % (len - i) + i;
char t = s[i];
s[i] = s[j];
s[j] = t;
}
return s;
}
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