limits.h

一个用于学习的操作系统

#ifndef _LINUX_LIMITS_H
#define _LINUX_LIMITS_H

#define NAME_MAX 255

#define NR_TASKS 1024

#define NR_OPEN 32              //一个进程打开的最大文件数
#define NR_INODE 128
#define NR_FILE 128
#define NR_SUPER 8
#define NR_HASH 307
#define BLOCK_SIZE 1024
#define BLOCK_SIZE_BITS 10
#define MAX_CHRDEV 16
#define MAX_BLKDEV 16

#define NGROUPS_MAX       32    /* supplemental group IDs are available */
#define ARG_MAX        40960    /* # bytes of args + environ for exec() */
#define CHILD_MAX        999    /* no limit :-) */
#define OPEN_MAX          32    /* # open files a process may have */
#define LINK_MAX         127    /* # links a file may have */
#define MAX_CANON        255    /* size of the canonical input queue */
#define MAX_INPUT        255    /* size of the type-ahead buffer */
#define NAME_MAX         255    /* # chars in a file name */
#define PATH_MAX        1024    /* # chars in a path name */
#define PIPE_BUF        4095    /* # bytes in atomic write to a pipe */

#endif