ClickHouse/libs/libglibc-compatibility/musl/fcntl.c

62 lines
1.8 KiB
C

#define _GNU_SOURCE
#include <fcntl.h>
#include <stdarg.h>
#include <errno.h>
#include <unistd.h>
#include <syscall.h>
#include "syscall.h"
#include <features.h>
#if defined(__GLIBC__) && __GLIBC__ >= 2
# define GLIBC_MINOR __GLIBC_MINOR__
#elif defined (__GNU_LIBRARY__) && __GNU_LIBRARY__ >= 2
# define GLIBC_MINOR __GNU_LIBRARY_MINOR__
#endif
#if defined(GLIBC_MINOR) && GLIBC_MINOR >= 28
int fcntl64(int fd, int cmd, ...)
{
unsigned long arg;
va_list ap;
va_start(ap, cmd);
arg = va_arg(ap, unsigned long);
va_end(ap);
if (cmd == F_SETFL) arg |= O_LARGEFILE;
if (cmd == F_SETLKW) return syscall(SYS_fcntl, fd, cmd, (void *)arg);
if (cmd == F_GETOWN) {
struct f_owner_ex ex;
int ret = __syscall(SYS_fcntl, fd, F_GETOWN_EX, &ex);
if (ret == -EINVAL) return __syscall(SYS_fcntl, fd, cmd, (void *)arg);
if (ret) return __syscall_ret(ret);
return ex.type == F_OWNER_PGRP ? -ex.pid : ex.pid;
}
if (cmd == F_DUPFD_CLOEXEC) {
int ret = __syscall(SYS_fcntl, fd, F_DUPFD_CLOEXEC, arg);
if (ret != -EINVAL) {
if (ret >= 0)
__syscall(SYS_fcntl, ret, F_SETFD, FD_CLOEXEC);
return __syscall_ret(ret);
}
ret = __syscall(SYS_fcntl, fd, F_DUPFD_CLOEXEC, 0);
if (ret != -EINVAL) {
if (ret >= 0) __syscall(SYS_close, ret);
return __syscall_ret(-EINVAL);
}
ret = __syscall(SYS_fcntl, fd, F_DUPFD, arg);
if (ret >= 0) __syscall(SYS_fcntl, ret, F_SETFD, FD_CLOEXEC);
return __syscall_ret(ret);
}
switch (cmd) {
case F_SETLK:
case F_GETLK:
case F_GETOWN_EX:
case F_SETOWN_EX:
return syscall(SYS_fcntl, fd, cmd, (void *)arg);
default:
return syscall(SYS_fcntl, fd, cmd, arg);
}
}
#endif