1 /* 2 * Copyright (c) 1989 The Regents of the University of California. 3 * All rights reserved. 4 * 5 * %sccs.include.redist.c% 6 * 7 * @(#)unistd.h 5.13 (Berkeley) 02/22/91 8 */ 9 10 #ifndef _SYS_UNISTD_H_ 11 #define _SYS_UNISTD_H_ 12 13 /* compile-time symbolic constants */ 14 #define _POSIX_JOB_CONTROL /* implementation supports job control */ 15 /*#define _POSIX_SAVED_IDS /* saved set-user-ID and set-group-ID */ 16 #define _POSIX_VERSION 198808L 17 18 /* execution-time symbolic constants */ 19 #define _POSIX_CHOWN_RESTRICTED /* chown requires appropriate privileges */ 20 #define _POSIX_NO_TRUNC /* too-long path components generate errors */ 21 /* may disable terminal special characters */ 22 #define _POSIX_VDISABLE ((unsigned char)'\377') 23 24 /* access function */ 25 #define F_OK 0 /* test for existence of file */ 26 #define X_OK 0x01 /* test for execute or search permission */ 27 #define W_OK 0x02 /* test for write permission */ 28 #define R_OK 0x04 /* test for read permission */ 29 30 /* whence values for lseek(2) */ 31 #define SEEK_SET 0 /* set file offset to offset */ 32 #define SEEK_CUR 1 /* set file offset to current plus offset */ 33 #define SEEK_END 2 /* set file offset to EOF plus offset */ 34 35 #ifndef _POSIX_SOURCE 36 /* whence values for lseek(2); renamed by POSIX 1003.1 */ 37 #define L_SET SEEK_SET 38 #define L_INCR SEEK_CUR 39 #define L_XTND SEEK_END 40 #endif 41 42 /* configurable pathname variables */ 43 #define _PC_LINK_MAX 1 44 #define _PC_MAX_CANON 2 45 #define _PC_MAX_INPUT 3 46 #define _PC_NAME_MAX 4 47 #define _PC_PATH_MAX 5 48 #define _PC_PIPE_BUF 6 49 #define _PC_CHOWN_RESTRICTED 7 50 #define _PC_NO_TRUNC 8 51 #define _PC_VDISABLE 9 52 53 /* configurable system variables */ 54 #define _SC_ARG_MAX 1 55 #define _SC_CHILD_MAX 2 56 #define _SC_CLK_TCK 3 57 #define _SC_NGROUPS_MAX 4 58 #define _SC_OPEN_MAX 5 59 #define _SC_JOB_CONTROL 6 60 #define _SC_SAVED_IDS 7 61 #define _SC_VERSION 8 62 63 #endif /* !_SYS_UNISTD_H_ */ 64