1 /* 2 * Copyright (c) 1989 The Regents of the University of California. 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms are permitted 6 * provided that the above copyright notice and this paragraph are 7 * duplicated in all such forms and that any documentation, 8 * advertising materials, and other materials related to such 9 * distribution and use acknowledge that the software was developed 10 * by the University of California, Berkeley. The name of the 11 * University may not be used to endorse or promote products derived 12 * from this software without specific prior written permission. 13 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR 14 * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED 15 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. 16 * 17 * @(#)unistd.h 5.2 (Berkeley) 05/24/89 18 */ 19 20 /* compile-time symbolic constants */ 21 #define POSIX_JOB_CONTROL /* implementation supports job control */ 22 #define POSIX_SAVED_IDS /* saved set-user-ID and set-group-ID */ 23 #define POSIX_VERSION 198808L 24 25 /* execution-time symbolic constants */ 26 #define POSIX_CHOWN_RESTRICTED /* chown requires appropriate privileges */ 27 #define POSIX_NO_TRUNC /* too-long path components generate errors */ 28 #define POSIX_VDISABLE /* may disable terminal special characters */ 29 30 /* access function */ 31 #define R_OK 4 /* test for read permission */ 32 #define W_OK 2 /* test for write permission */ 33 #define X_OK 1 /* test for execute or search permission */ 34 #define F_OK 0 /* test for existence of file */ 35 36 /* lseek function */ 37 #define SEEK_SET 0 /* set file offset to offset */ 38 #define SEEK_CUR 1 /* set file offset to current plus offset */ 39 #define SEEK_END 2 /* set file offset to EOF plus offset */ 40 41 /* map a stream pointer to a file descriptor */ 42 #define STDIN_FILENO 0 /* standard input value, stdin */ 43 #define STDOUT_FILENO 1 /* standard output value, stdout */ 44 #define STDERR_FILENO 2 /* standard error value, stdout */ 45 46 #define NULL 0 /* null pointer constant */ 47 48 /* configurable pathname variables */ 49 #define _PC_LINK_MAX 1 50 #define _PC_MAX_CANON 2 51 #define _PC_MAX_INPUT 3 52 #define _PC_NAME_MAX 4 53 #define _PC_PATH_MAX 5 54 #define _PC_PIPE_BUF 6 55 #define _PC_CHOWN_RESTRICTED 7 56 #define _PC_NO_TRUNC 8 57 #define _PC_VDISABLE 9 58 59 /* configurable system variables */ 60 #define _SC_ARG_MAX 1 61 #define _SC_CHILD_MAX 2 62 #define _SC_CLK_TCK 3 63 #define _SC_NGROUPS_MAX 4 64 #define _SC_OPEN_MAX 5 65 #define _SC_JOB_CONTROL 6 66 #define _SC_SAVED_IDS 7 67 #define _SC_VERSION 8 68