53 lines
1.1 KiB
C++
53 lines
1.1 KiB
C++
#include <bits/errno-return.h>
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#include <fcntl.h>
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#include <stdarg.h>
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#include <sys/syscall.h>
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#include <unistd.h>
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extern "C"
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{
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int open(const char* path, int flags, ...)
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{
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va_list ap;
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va_start(ap, flags);
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mode_t mode = (mode_t)va_arg(ap, int);
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long rc = syscall(SYS_openat, AT_FDCWD, path, flags, mode);
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va_end(ap);
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__errno_return(rc, int);
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}
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int openat(int dirfd, const char* path, int flags, ...)
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{
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va_list ap;
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va_start(ap, flags);
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mode_t mode = (mode_t)va_arg(ap, int);
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long rc = syscall(SYS_openat, dirfd, path, flags, mode);
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va_end(ap);
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__errno_return(rc, int);
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}
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int creat(const char* path, mode_t mode)
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{
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return openat(AT_FDCWD, path, O_WRONLY | O_CREAT | O_TRUNC, mode);
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}
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int fcntl(int fd, int cmd, ...)
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{
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va_list ap;
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va_start(ap, cmd);
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uintptr_t arg = (uintptr_t)va_arg(ap, uintptr_t);
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long rc = syscall(SYS_fcntl, fd, cmd, arg);
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va_end(ap);
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__errno_return(rc, int);
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}
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}
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