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#define _GNU_SOURCE
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#include <sys/socket.h>
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#include <errno.h>
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#include <fcntl.h>
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#include "syscall.h"
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int accept4(int fd, struct sockaddr *restrict addr, socklen_t *restrict len, int flg)
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{
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if (!flg) return accept(fd, addr, len);
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int ret = socketcall_cp(accept4, fd, addr, len, flg, 0, 0);
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if (ret>=0 || (errno != ENOSYS && errno != EINVAL)) return ret;
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ret = accept(fd, addr, len);
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if (ret<0) return ret;
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if (flg & SOCK_CLOEXEC)
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__syscall(SYS_fcntl, ret, F_SETFD, FD_CLOEXEC);
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if (flg & SOCK_NONBLOCK)
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__syscall(SYS_fcntl, ret, F_SETFL, O_NONBLOCK);
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return ret;
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}
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