uapi/linux/posix_types.h

0001 /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
0002 #ifndef _LINUX_POSIX_TYPES_H
0003 #define _LINUX_POSIX_TYPES_H
0004
0005 #include <linux/stddef.h>
0006
0007 /*
0008  * This allows for 1024 file descriptors: if NR_OPEN is ever grown
0009  * beyond that you'll have to change this too. But 1024 fd's seem to be
0010  * enough even for such "real" unices like OSF/1, so hopefully this is
0011  * one limit that doesn't have to be changed [again].
0012  *
0013  * Note that POSIX wants the FD_CLEAR(fd,fdsetp) defines to be in
0014  * <sys/time.h> (and thus <linux/time.h>) - but this is a more logical
0015  * place for them. Solved by having dummy defines in <sys/time.h>.
0016  */
0017
0018 /*
0019  * This macro may have been defined in <gnu/types.h>. But we always
0020  * use the one here.
0021  */
0022 #undef __FD_SETSIZE
0023 #define __FD_SETSIZE    1024
0024
0025 typedef struct {
0026     unsigned long fds_bits[__FD_SETSIZE / (8 * sizeof(long))];
0027 } __kernel_fd_set;
0028
0029 /* Type of a signal handler.  */
0030 typedef void (*__kernel_sighandler_t)(int);
0031
0032 /* Type of a SYSV IPC key.  */
0033 typedef int __kernel_key_t;
0034 typedef int __kernel_mqd_t;
0035
0036 #include <asm/posix_types.h>
0037
0038 #endif /* _LINUX_POSIX_TYPES_H */