1 /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */ 2 #ifndef _LINUX_LIMITS_H 3 #define _LINUX_LIMITS_H 4 5 #define NR_OPEN 1024 6 7 #define NGROUPS_MAX 65536 /* supplemental group IDs are available */ 8 #define ARG_MAX 131072 /* # bytes of args + environ for exec() */ 9 #define LINK_MAX 127 /* # links a file may have */ 10 #define MAX_CANON 255 /* size of the canonical input queue */ 11 #define MAX_INPUT 255 /* size of the type-ahead buffer */ 12 #define NAME_MAX 255 /* # chars in a file name */ 13 #define PATH_MAX 4096 /* # chars in a path name including nul */ 14 #define PIPE_BUF 4096 /* # bytes in atomic write to a pipe */ 15 #define XATTR_NAME_MAX 255 /* # chars in an extended attribute name */ 16 #define XATTR_SIZE_MAX 65536 /* size of an extended attribute value (64k) */ 17 #define XATTR_LIST_MAX 65536 /* size of extended attribute namelist (64k) */ 18 19 #define RTSIG_MAX 32 20 21 #endif 22