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#include "errno.h" // for EINVAL
#include <fcntl.h> // for F_DUPFD_CLOEXEC, FD_CLOEXEC, F_SETFD, F_D...
#include <stdarg.h> // for va_arg, va_end, va_list, va_start
#include <syscall.h> // for __syscall_ret, syscall, __syscall_3, __sy...
int fcntl(int fildes, int cmd, ...)
{
unsigned long arg;
va_list ap;
va_start(ap, cmd);
arg = va_arg(ap, unsigned long);
va_end(ap);
if (cmd == F_DUPFD_CLOEXEC) {
int ret = syscall(fcntl, fildes, F_DUPFD_CLOEXEC, arg);
if (ret != -EINVAL) {
if (ret >= 0)
syscall(fcntl, ret, F_SETFD, FD_CLOEXEC);
return __syscall_ret(ret);
}
ret = syscall(fcntl, fildes, F_DUPFD_CLOEXEC, 0);
if (ret != -EINVAL) {
if (ret >= 0)
__syscall(close, ret);
return __syscall_ret(-EINVAL);
}
ret = syscall(fcntl, fildes, F_DUPFD, arg);
if (ret >= 0)
syscall(fcntl, ret, F_SETFD, FD_CLOEXEC);
return __syscall_ret(ret);
}
return syscall(fcntl, fildes, cmd);
}
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