mirror of
https://github.com/ClickHouse/ClickHouse.git
synced 2024-12-13 09:52:38 +00:00
434 lines
10 KiB
C
434 lines
10 KiB
C
/** Allows to build programs with libc 2.27 and run on systems with at least libc 2.4,
|
|
* such as Ubuntu Hardy or CentOS 5.
|
|
*
|
|
* Also look at http://www.lightofdawn.org/wiki/wiki.cgi/NewAppsOnOldGlibc
|
|
*/
|
|
|
|
#if defined (__cplusplus)
|
|
extern "C" {
|
|
#endif
|
|
|
|
#include <signal.h>
|
|
#include <unistd.h>
|
|
#include <string.h>
|
|
#include <sys/syscall.h>
|
|
|
|
long int syscall(long int __sysno, ...) __THROW;
|
|
|
|
int __gai_sigqueue(int sig, const union sigval val, pid_t caller_pid)
|
|
{
|
|
siginfo_t info;
|
|
|
|
memset(&info, 0, sizeof(siginfo_t));
|
|
info.si_signo = sig;
|
|
info.si_code = SI_ASYNCNL;
|
|
info.si_pid = caller_pid;
|
|
info.si_uid = getuid();
|
|
info.si_value = val;
|
|
|
|
return syscall(__NR_rt_sigqueueinfo, info.si_pid, sig, &info);
|
|
}
|
|
|
|
|
|
#include <sys/select.h>
|
|
#include <stdlib.h>
|
|
#include <features.h>
|
|
|
|
#if __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 16)
|
|
long int __fdelt_chk(long int d)
|
|
{
|
|
if (d < 0)
|
|
abort();
|
|
#else
|
|
unsigned long int __fdelt_chk(unsigned long int d)
|
|
{
|
|
#endif
|
|
if (d >= FD_SETSIZE)
|
|
abort();
|
|
return d / __NFDBITS;
|
|
}
|
|
|
|
#include <sys/poll.h>
|
|
#include <stddef.h>
|
|
|
|
int __poll_chk(struct pollfd * fds, nfds_t nfds, int timeout, size_t fdslen)
|
|
{
|
|
if (fdslen / sizeof(*fds) < nfds)
|
|
abort();
|
|
return poll(fds, nfds, timeout);
|
|
}
|
|
|
|
#include <setjmp.h>
|
|
|
|
void musl_glibc_longjmp(jmp_buf env, int val);
|
|
|
|
/// NOTE This disables some of FORTIFY_SOURCE functionality.
|
|
|
|
void __longjmp_chk(jmp_buf env, int val)
|
|
{
|
|
musl_glibc_longjmp(env, val);
|
|
}
|
|
|
|
#include <stdarg.h>
|
|
|
|
int vasprintf(char **s, const char *fmt, va_list ap);
|
|
|
|
int __vasprintf_chk(char **s, int unused, const char *fmt, va_list ap)
|
|
{
|
|
return vasprintf(s, fmt, ap);
|
|
}
|
|
|
|
int __asprintf_chk(char **result_ptr, int unused, const char *format, ...)
|
|
{
|
|
int ret;
|
|
va_list ap;
|
|
va_start (ap, format);
|
|
ret = vasprintf(result_ptr, format, ap);
|
|
va_end (ap);
|
|
return ret;
|
|
}
|
|
|
|
int vdprintf(int fd, const char *format, va_list ap);
|
|
|
|
int __dprintf_chk (int d, int unused, const char *format, ...)
|
|
{
|
|
int ret;
|
|
va_list ap;
|
|
va_start (ap, format);
|
|
ret = vdprintf(d, format, ap);
|
|
va_end (ap);
|
|
return ret;
|
|
}
|
|
|
|
size_t fread(void *ptr, size_t size, size_t nmemb, void *stream);
|
|
|
|
size_t __fread_chk(void *ptr, size_t unused, size_t size, size_t nmemb, void *stream)
|
|
{
|
|
return fread(ptr, size, nmemb, stream);
|
|
}
|
|
|
|
int vsscanf(const char *str, const char *format, va_list ap);
|
|
|
|
int __isoc99_vsscanf(const char *str, const char *format, va_list ap)
|
|
{
|
|
return vsscanf(str, format, ap);
|
|
}
|
|
|
|
int sscanf(const char *restrict s, const char *restrict fmt, ...)
|
|
{
|
|
int ret;
|
|
va_list ap;
|
|
va_start(ap, fmt);
|
|
ret = vsscanf(s, fmt, ap);
|
|
va_end(ap);
|
|
return ret;
|
|
}
|
|
|
|
int __isoc99_sscanf(const char *str, const char *format, ...) __attribute__((weak, nonnull, nothrow, alias("sscanf")));
|
|
|
|
int open(const char *path, int oflag);
|
|
|
|
int __open_2(const char *path, int oflag)
|
|
{
|
|
return open(path, oflag);
|
|
}
|
|
|
|
|
|
#include <pthread.h>
|
|
|
|
/// No-ops.
|
|
int pthread_setname_np(pthread_t thread, const char *name) { return 0; }
|
|
int pthread_getname_np(pthread_t thread, char *name, size_t len) { name[0] = '\0'; return 0; };
|
|
|
|
|
|
#define SHMDIR "/dev/shm/"
|
|
const char * __shm_directory(size_t * len)
|
|
{
|
|
*len = sizeof(SHMDIR) - 1;
|
|
return SHMDIR;
|
|
}
|
|
|
|
|
|
/// https://boringssl.googlesource.com/boringssl/+/ad1907fe73334d6c696c8539646c21b11178f20f%5E!/#F0
|
|
/* Copyright (c) 2015, Google Inc.
|
|
*
|
|
* Permission to use, copy, modify, and/or distribute this software for any
|
|
* purpose with or without fee is hereby granted, provided that the above
|
|
* copyright notice and this permission notice appear in all copies.
|
|
*
|
|
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
|
|
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
|
|
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
|
|
* SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
|
|
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
|
|
* OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
|
|
* CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
|
|
*/
|
|
void __attribute__((__weak__)) explicit_bzero(void * buf, size_t len)
|
|
{
|
|
memset(buf, 0, len);
|
|
__asm__ __volatile__("" :: "r"(buf) : "memory");
|
|
}
|
|
|
|
void __explicit_bzero_chk(void * buf, size_t len, size_t unused)
|
|
{
|
|
return explicit_bzero(buf, len);
|
|
}
|
|
|
|
|
|
#include <unistd.h>
|
|
#include "syscall.h"
|
|
|
|
ssize_t copy_file_range(int fd_in, off_t *off_in, int fd_out, off_t *off_out, size_t len, unsigned flags)
|
|
{
|
|
return syscall(SYS_copy_file_range, fd_in, off_in, fd_out, off_out, len, flags);
|
|
}
|
|
|
|
|
|
long splice(int fd_in, off_t *off_in, int fd_out, off_t *off_out, size_t len, unsigned flags)
|
|
{
|
|
return syscall(SYS_splice, fd_in, off_in, fd_out, off_out, len, flags);
|
|
}
|
|
|
|
|
|
#define _BSD_SOURCE
|
|
#include <sys/stat.h>
|
|
#include <stdint.h>
|
|
|
|
struct statx {
|
|
uint32_t stx_mask;
|
|
uint32_t stx_blksize;
|
|
uint64_t stx_attributes;
|
|
uint32_t stx_nlink;
|
|
uint32_t stx_uid;
|
|
uint32_t stx_gid;
|
|
uint16_t stx_mode;
|
|
uint16_t pad1;
|
|
uint64_t stx_ino;
|
|
uint64_t stx_size;
|
|
uint64_t stx_blocks;
|
|
uint64_t stx_attributes_mask;
|
|
struct {
|
|
int64_t tv_sec;
|
|
uint32_t tv_nsec;
|
|
int32_t pad;
|
|
} stx_atime, stx_btime, stx_ctime, stx_mtime;
|
|
uint32_t stx_rdev_major;
|
|
uint32_t stx_rdev_minor;
|
|
uint32_t stx_dev_major;
|
|
uint32_t stx_dev_minor;
|
|
uint64_t spare[14];
|
|
};
|
|
|
|
int statx(int fd, const char *restrict path, int flag,
|
|
unsigned int mask, struct statx *restrict statxbuf)
|
|
{
|
|
return syscall(SYS_statx, fd, path, flag, mask, statxbuf);
|
|
}
|
|
|
|
|
|
#include <syscall.h>
|
|
|
|
ssize_t getrandom(void *buf, size_t buflen, unsigned flags)
|
|
{
|
|
/// There was cancellable syscall (syscall_cp), but I don't care too.
|
|
return syscall(SYS_getrandom, buf, buflen, flags);
|
|
}
|
|
|
|
/* Structure for scatter/gather I/O. */
|
|
struct iovec
|
|
{
|
|
void *iov_base; /* Pointer to data. */
|
|
size_t iov_len; /* Length of data. */
|
|
};
|
|
|
|
ssize_t preadv(int __fd, const struct iovec *__iovec, int __count, __off_t __offset)
|
|
{
|
|
return syscall(SYS_preadv, __fd, __iovec, __count, (long)(__offset), (long)(__offset>>32));
|
|
}
|
|
|
|
#include <errno.h>
|
|
#include <limits.h>
|
|
|
|
#define ALIGN (sizeof(size_t))
|
|
#define ONES ((size_t)-1/UCHAR_MAX)
|
|
#define HIGHS (ONES * (UCHAR_MAX/2+1))
|
|
#define HASZERO(x) ((x)-ONES & ~(x) & HIGHS)
|
|
|
|
char *__strchrnul(const char *s, int c)
|
|
{
|
|
c = (unsigned char)c;
|
|
if (!c) return (char *)s + strlen(s);
|
|
|
|
#ifdef __GNUC__
|
|
typedef size_t __attribute__((__may_alias__)) word;
|
|
const word *w;
|
|
for (; (uintptr_t)s % ALIGN; s++)
|
|
if (!*s || *(unsigned char *)s == c) return (char *)s;
|
|
size_t k = ONES * c;
|
|
for (w = (void *)s; !HASZERO(*w) && !HASZERO(*w^k); w++);
|
|
s = (void *)w;
|
|
#endif
|
|
for (; *s && *(unsigned char *)s != c; s++);
|
|
return (char *)s;
|
|
}
|
|
|
|
int __execvpe(const char *file, char *const argv[], char *const envp[])
|
|
{
|
|
const char *p, *z, *path = getenv("PATH");
|
|
size_t l, k;
|
|
int seen_eacces = 0;
|
|
|
|
errno = ENOENT;
|
|
if (!*file) return -1;
|
|
|
|
if (strchr(file, '/'))
|
|
return execve(file, argv, envp);
|
|
|
|
if (!path) path = "/usr/local/bin:/bin:/usr/bin";
|
|
k = strnlen(file, NAME_MAX+1);
|
|
if (k > NAME_MAX) {
|
|
errno = ENAMETOOLONG;
|
|
return -1;
|
|
}
|
|
l = strnlen(path, PATH_MAX-1)+1;
|
|
|
|
for(p=path; ; p=z) {
|
|
char b[l+k+1];
|
|
z = __strchrnul(p, ':');
|
|
if (z-p >= l) {
|
|
if (!*z++) break;
|
|
continue;
|
|
}
|
|
memcpy(b, p, z-p);
|
|
b[z-p] = '/';
|
|
memcpy(b+(z-p)+(z>p), file, k+1);
|
|
execve(b, argv, envp);
|
|
switch (errno) {
|
|
case EACCES:
|
|
seen_eacces = 1;
|
|
case ENOENT:
|
|
case ENOTDIR:
|
|
break;
|
|
default:
|
|
return -1;
|
|
}
|
|
if (!*z++) break;
|
|
}
|
|
if (seen_eacces) errno = EACCES;
|
|
return -1;
|
|
}
|
|
|
|
|
|
#include "spawn.h"
|
|
|
|
int posix_spawnp(pid_t *restrict res, const char *restrict file,
|
|
const posix_spawn_file_actions_t *fa,
|
|
const posix_spawnattr_t *restrict attr,
|
|
char *const argv[restrict], char *const envp[restrict])
|
|
{
|
|
posix_spawnattr_t spawnp_attr = { 0 };
|
|
if (attr) spawnp_attr = *attr;
|
|
spawnp_attr.__fn = (void *)__execvpe;
|
|
return posix_spawn(res, file, fa, &spawnp_attr, argv, envp);
|
|
}
|
|
|
|
#define FDOP_CLOSE 1
|
|
#define FDOP_DUP2 2
|
|
#define FDOP_OPEN 3
|
|
#define FDOP_CHDIR 4
|
|
#define FDOP_FCHDIR 5
|
|
|
|
#define ENOMEM 12
|
|
#define EBADF 9
|
|
|
|
struct fdop {
|
|
struct fdop *next, *prev;
|
|
int cmd, fd, srcfd, oflag;
|
|
mode_t mode;
|
|
char path[];
|
|
};
|
|
|
|
int posix_spawn_file_actions_init(posix_spawn_file_actions_t *fa) {
|
|
fa->__actions = 0;
|
|
return 0;
|
|
}
|
|
|
|
int posix_spawn_file_actions_addchdir_np(posix_spawn_file_actions_t *restrict fa, const char *restrict path) {
|
|
struct fdop *op = malloc(sizeof *op + strlen(path) + 1);
|
|
if (!op) return ENOMEM;
|
|
op->cmd = FDOP_CHDIR;
|
|
op->fd = -1;
|
|
strcpy(op->path, path);
|
|
if ((op->next = fa->__actions)) op->next->prev = op;
|
|
op->prev = 0;
|
|
fa->__actions = op;
|
|
return 0;
|
|
}
|
|
|
|
int posix_spawn_file_actions_addclose(posix_spawn_file_actions_t *fa, int fd) {
|
|
if (fd < 0) return EBADF;
|
|
struct fdop *op = malloc(sizeof *op);
|
|
if (!op) return ENOMEM;
|
|
op->cmd = FDOP_CLOSE;
|
|
op->fd = fd;
|
|
if ((op->next = fa->__actions)) op->next->prev = op;
|
|
op->prev = 0;
|
|
fa->__actions = op;
|
|
return 0;
|
|
}
|
|
|
|
int posix_spawn_file_actions_adddup2(posix_spawn_file_actions_t *fa, int srcfd, int fd) {
|
|
if (srcfd < 0 || fd < 0) return EBADF;
|
|
struct fdop *op = malloc(sizeof *op);
|
|
if (!op) return ENOMEM;
|
|
op->cmd = FDOP_DUP2;
|
|
op->srcfd = srcfd;
|
|
op->fd = fd;
|
|
if ((op->next = fa->__actions)) op->next->prev = op;
|
|
op->prev = 0;
|
|
fa->__actions = op;
|
|
return 0;
|
|
}
|
|
|
|
int posix_spawn_file_actions_addfchdir_np(posix_spawn_file_actions_t *fa, int fd) {
|
|
if (fd < 0) return EBADF;
|
|
struct fdop *op = malloc(sizeof *op);
|
|
if (!op) return ENOMEM;
|
|
op->cmd = FDOP_FCHDIR;
|
|
op->fd = fd;
|
|
if ((op->next = fa->__actions)) op->next->prev = op;
|
|
op->prev = 0;
|
|
fa->__actions = op;
|
|
return 0;
|
|
}
|
|
|
|
int posix_spawn_file_actions_addopen(posix_spawn_file_actions_t *restrict fa, int fd, const char *restrict path, int flags, mode_t mode) {
|
|
if (fd < 0) return EBADF;
|
|
struct fdop *op = malloc(sizeof *op + strlen(path) + 1);
|
|
if (!op) return ENOMEM;
|
|
op->cmd = FDOP_OPEN;
|
|
op->fd = fd;
|
|
op->oflag = flags;
|
|
op->mode = mode;
|
|
strcpy(op->path, path);
|
|
if ((op->next = fa->__actions)) op->next->prev = op;
|
|
op->prev = 0;
|
|
fa->__actions = op;
|
|
return 0;
|
|
}
|
|
|
|
int posix_spawn_file_actions_destroy(posix_spawn_file_actions_t *fa) {
|
|
struct fdop *op = fa->__actions, *next;
|
|
while (op) {
|
|
next = op->next;
|
|
free(op);
|
|
op = next;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
#if defined (__cplusplus)
|
|
}
|
|
#endif
|