1 /*- 2 * Copyright (c) 1992, 1993 3 * The Regents of the University of California. All rights reserved. 4 * (c) UNIX System Laboratories, Inc. 5 * All or some portions of this file are derived from material licensed 6 * to the University of California by American Telephone and Telegraph 7 * Co. or Unix System Laboratories, Inc. and are reproduced herein with 8 * the permission of UNIX System Laboratories, Inc. 9 * 10 * %sccs.include.redist.c% 11 * 12 * @(#)exec.h 8.3 (Berkeley) 01/21/94 13 */ 14 15 #include <machine/exec.h> 16 17 /* 18 * The following structure is found at the top of the user stack of each 19 * user process. The ps program uses it to locate argv and environment 20 * strings. Programs that wish ps to display other information may modify 21 * it; normally ps_argvstr points to the text for argv[0], and ps_nargvstr 22 * is the same as the program's argc. The fields ps_envstr and ps_nenvstr 23 * are the equivalent for the environment. 24 */ 25 struct ps_strings { 26 char *ps_argvstr; /* first of 0 or more argument strings */ 27 int ps_nargvstr; /* the number of argument strings */ 28 char *ps_envstr; /* first of 0 or more environment strings */ 29 int ps_nenvstr; /* the number of environment strings */ 30 }; 31 32 /* 33 * Address of ps_strings structure (in user space). 34 */ 35 #define PS_STRINGS \ 36 ((struct ps_strings *)(USRSTACK - sizeof(struct ps_strings))) 37 38 /* 39 * Arguments to the exec system call. 40 */ 41 struct execve_args { 42 char *fname; 43 char **argp; 44 char **envp; 45 }; 46