1#ifndef _LINUX_LIMITS_H 2#define _LINUX_LIMITS_H 3 4#define NR_OPEN 1024 5 6#define NGROUPS_MAX 65536 /* supplemental group IDs are available */ 7#define ARG_MAX 131072 /* # bytes of args + environ for exec() */ 8#define LINK_MAX 127 /* # links a file may have */ 9#define MAX_CANON 255 /* size of the canonical input queue */ 10#define MAX_INPUT 255 /* size of the type-ahead buffer */ 11#define NAME_MAX 255 /* # chars in a file name */ 12#define PATH_MAX 4096 /* # chars in a path name including nul */ 13#define PIPE_BUF 4096 /* # bytes in atomic write to a pipe */ 14#define XATTR_NAME_MAX 255 /* # chars in an extended attribute name */ 15#define XATTR_SIZE_MAX 65536 /* size of an extended attribute value (64k) */ 16#define XATTR_LIST_MAX 65536 /* size of extended attribute namelist (64k) */ 17 18#define RTSIG_MAX 32 19 20#endif 21