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      1 /*
      2  * CDDL HEADER START
      3  *
      4  * The contents of this file are subject to the terms of the
      5  * Common Development and Distribution License, Version 1.0 only
      6  * (the "License").  You may not use this file except in compliance
      7  * with the License.
      8  *
      9  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
     10  * or http://www.opensolaris.org/os/licensing.
     11  * See the License for the specific language governing permissions
     12  * and limitations under the License.
     13  *
     14  * When distributing Covered Code, include this CDDL HEADER in each
     15  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
     16  * If applicable, add the following below this CDDL HEADER, with the
     17  * fields enclosed by brackets "[]" replaced with your own identifying
     18  * information: Portions Copyright [yyyy] [name of copyright owner]
     19  *
     20  * CDDL HEADER END
     21  */
     22 /*
     23  * Copyright (c) 1997-2001 by Sun Microsystems, Inc.
     24  * All rights reserved.
     25  */
     26 
     27 #pragma ident	"%Z%%M%	%I%	%E% SMI"
     28 
     29 #include <stdlib.h>
     30 #include <unistd.h>
     31 #include <string.h>
     32 #include <fcntl.h>
     33 #include <errno.h>
     34 #include "libproc.h"
     35 
     36 /*
     37  * open() system call -- executed by subject process.
     38  */
     39 int
     40 pr_open(struct ps_prochandle *Pr, const char *filename, int flags, mode_t mode)
     41 {
     42 	sysret_t rval;			/* return value from open() */
     43 	argdes_t argd[3];		/* arg descriptors for open() */
     44 	argdes_t *adp;
     45 	int error;
     46 
     47 	if (Pr == NULL)		/* no subject process */
     48 		return (open(filename, flags, mode));
     49 
     50 	adp = &argd[0];		/* filename argument */
     51 	adp->arg_value = 0;
     52 	adp->arg_object = (void *)filename;
     53 	adp->arg_type = AT_BYREF;
     54 	adp->arg_inout = AI_INPUT;
     55 	adp->arg_size = strlen(filename)+1;
     56 
     57 	adp++;			/* flags argument */
     58 	adp->arg_value = (long)flags;
     59 	adp->arg_object = NULL;
     60 	adp->arg_type = AT_BYVAL;
     61 	adp->arg_inout = AI_INPUT;
     62 	adp->arg_size = 0;
     63 
     64 	adp++;			/* mode argument */
     65 	adp->arg_value = (long)mode;
     66 	adp->arg_object = NULL;
     67 	adp->arg_type = AT_BYVAL;
     68 	adp->arg_inout = AI_INPUT;
     69 	adp->arg_size = 0;
     70 
     71 	error = Psyscall(Pr, &rval, SYS_open, 3, &argd[0]);
     72 
     73 	if (error) {
     74 		errno = (error > 0)? error : ENOSYS;
     75 		return (-1);
     76 	}
     77 	return (rval.sys_rval1);
     78 }
     79 
     80 /*
     81  * creat() system call -- executed by subject process.
     82  */
     83 int
     84 pr_creat(struct ps_prochandle *Pr, const char *filename, mode_t mode)
     85 {
     86 	sysret_t rval;			/* return value from creat() */
     87 	argdes_t argd[2];		/* arg descriptors for creat() */
     88 	argdes_t *adp;
     89 	int error;
     90 
     91 	if (Pr == NULL)		/* no subject process */
     92 		return (creat(filename, mode));
     93 
     94 	adp = &argd[0];		/* filename argument */
     95 	adp->arg_value = 0;
     96 	adp->arg_object = (void *)filename;
     97 	adp->arg_type = AT_BYREF;
     98 	adp->arg_inout = AI_INPUT;
     99 	adp->arg_size = strlen(filename)+1;
    100 
    101 	adp++;			/* mode argument */
    102 	adp->arg_value = (long)mode;
    103 	adp->arg_object = NULL;
    104 	adp->arg_type = AT_BYVAL;
    105 	adp->arg_inout = AI_INPUT;
    106 	adp->arg_size = 0;
    107 
    108 	error = Psyscall(Pr, &rval, SYS_creat, 2, &argd[0]);
    109 
    110 	if (error) {
    111 		errno = (error > 0)? error : ENOSYS;
    112 		return (-1);
    113 	}
    114 	return (rval.sys_rval1);
    115 }
    116 
    117 /*
    118  * close() system call -- executed by subject process.
    119  */
    120 int
    121 pr_close(struct ps_prochandle *Pr, int fd)
    122 {
    123 	sysret_t rval;			/* return value from close() */
    124 	argdes_t argd[1];		/* arg descriptors for close() */
    125 	argdes_t *adp;
    126 	int error;
    127 
    128 	if (Pr == NULL)		/* no subject process */
    129 		return (close(fd));
    130 
    131 	adp = &argd[0];		/* fd argument */
    132 	adp->arg_value = (int)fd;
    133 	adp->arg_object = NULL;
    134 	adp->arg_type = AT_BYVAL;
    135 	adp->arg_inout = AI_INPUT;
    136 	adp->arg_size = 0;
    137 
    138 	error = Psyscall(Pr, &rval, SYS_close, 1, &argd[0]);
    139 
    140 	if (error) {
    141 		errno = (error > 0)? error : ENOSYS;
    142 		return (-1);
    143 	}
    144 	return (rval.sys_rval1);
    145 }
    146 
    147 /*
    148  * access() system call -- executed by subject process.
    149  */
    150 int
    151 pr_access(struct ps_prochandle *Pr, const char *path, int amode)
    152 {
    153 	sysret_t rval;			/* return from access() */
    154 	argdes_t argd[2];		/* arg descriptors for access() */
    155 	argdes_t *adp;
    156 	int err;
    157 
    158 	if (Pr == NULL)		/* no subject process */
    159 		return (access(path, amode));
    160 
    161 	adp = &argd[0];		/* path argument */
    162 	adp->arg_value = 0;
    163 	adp->arg_object = (void *)path;
    164 	adp->arg_type = AT_BYREF;
    165 	adp->arg_inout = AI_INPUT;
    166 	adp->arg_size = strlen(path) + 1;
    167 
    168 	adp++;			/* amode argument */
    169 	adp->arg_value = (long)amode;
    170 	adp->arg_object = NULL;
    171 	adp->arg_type = AT_BYVAL;
    172 	adp->arg_inout = AI_INPUT;
    173 	adp->arg_size = 0;
    174 
    175 	err = Psyscall(Pr, &rval, SYS_access, 2, &argd[0]);
    176 
    177 	if (err) {
    178 		errno = (err > 0) ? err : ENOSYS;
    179 		return (-1);
    180 	}
    181 
    182 	return (rval.sys_rval1);
    183 }
    184