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 (the "License"). 6 * You may not use this file except in compliance with the License. 7 * 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9 * or http://www.opensolaris.org/os/licensing. 10 * See the License for the specific language governing permissions 11 * and limitations under the License. 12 * 13 * When distributing Covered Code, include this CDDL HEADER in each 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15 * If applicable, add the following below this CDDL HEADER, with the 16 * fields enclosed by brackets "[]" replaced with your own identifying 17 * information: Portions Copyright [yyyy] [name of copyright owner] 18 * 19 * CDDL HEADER END 20 */ 21 22 /* 23 * Copyright 2010 Sun Microsystems, Inc. All rights reserved. 24 * Use is subject to license terms. 25 */ 26 27 #include <stdlib.h> 28 #include <unistd.h> 29 #include <string.h> 30 #include <fcntl.h> 31 #include <errno.h> 32 #include "libproc.h" 33 34 /* 35 * open() system call -- executed by subject process. 36 */ 37 int 38 pr_open(struct ps_prochandle *Pr, const char *filename, int flags, mode_t mode) 39 { 40 sysret_t rval; /* return value from openat() */ 41 argdes_t argd[4]; /* arg descriptors for openat() */ 42 argdes_t *adp; 43 int error; 44 45 if (Pr == NULL) /* no subject process */ 46 return (open(filename, flags, mode)); 47 48 adp = &argd[0]; /* AT_FDCWD argument */ 49 adp->arg_value = AT_FDCWD; 50 adp->arg_object = NULL; 51 adp->arg_type = AT_BYVAL; 52 adp->arg_inout = AI_INPUT; 53 adp->arg_size = 0; 54 55 adp++; /* filename argument */ 56 adp->arg_value = 0; 57 adp->arg_object = (void *)filename; 58 adp->arg_type = AT_BYREF; 59 adp->arg_inout = AI_INPUT; 60 adp->arg_size = strlen(filename)+1; 61 62 adp++; /* flags argument */ 63 adp->arg_value = (long)flags; 64 adp->arg_object = NULL; 65 adp->arg_type = AT_BYVAL; 66 adp->arg_inout = AI_INPUT; 67 adp->arg_size = 0; 68 69 adp++; /* mode argument */ 70 adp->arg_value = (long)mode; 71 adp->arg_object = NULL; 72 adp->arg_type = AT_BYVAL; 73 adp->arg_inout = AI_INPUT; 74 adp->arg_size = 0; 75 76 error = Psyscall(Pr, &rval, SYS_openat, 4, &argd[0]); 77 78 if (error) { 79 errno = (error > 0)? error : ENOSYS; 80 return (-1); 81 } 82 return (rval.sys_rval1); 83 } 84 85 /* 86 * creat() system call -- executed by subject process. 87 */ 88 int 89 pr_creat(struct ps_prochandle *Pr, const char *filename, mode_t mode) 90 { 91 sysret_t rval; /* return value from openat() */ 92 argdes_t argd[4]; /* arg descriptors for openat() */ 93 argdes_t *adp; 94 int error; 95 96 if (Pr == NULL) /* no subject process */ 97 return (creat(filename, mode)); 98 99 adp = &argd[0]; /* AT_FDCWD argument */ 100 adp->arg_value = AT_FDCWD; 101 adp->arg_object = NULL; 102 adp->arg_type = AT_BYVAL; 103 adp->arg_inout = AI_INPUT; 104 adp->arg_size = 0; 105 106 adp++; /* filename argument */ 107 adp->arg_value = 0; 108 adp->arg_object = (void *)filename; 109 adp->arg_type = AT_BYREF; 110 adp->arg_inout = AI_INPUT; 111 adp->arg_size = strlen(filename)+1; 112 113 adp++; /* flags argument */ 114 adp->arg_value = (O_WRONLY | O_CREAT | O_TRUNC); 115 adp->arg_object = NULL; 116 adp->arg_type = AT_BYVAL; 117 adp->arg_inout = AI_INPUT; 118 adp->arg_size = 0; 119 120 adp++; /* mode argument */ 121 adp->arg_value = (long)mode; 122 adp->arg_object = NULL; 123 adp->arg_type = AT_BYVAL; 124 adp->arg_inout = AI_INPUT; 125 adp->arg_size = 0; 126 127 error = Psyscall(Pr, &rval, SYS_openat, 4, &argd[0]); 128 129 if (error) { 130 errno = (error > 0)? error : ENOSYS; 131 return (-1); 132 } 133 return (rval.sys_rval1); 134 } 135 136 /* 137 * close() system call -- executed by subject process. 138 */ 139 int 140 pr_close(struct ps_prochandle *Pr, int fd) 141 { 142 sysret_t rval; /* return value from close() */ 143 argdes_t argd[1]; /* arg descriptors for close() */ 144 argdes_t *adp; 145 int error; 146 147 if (Pr == NULL) /* no subject process */ 148 return (close(fd)); 149 150 adp = &argd[0]; /* fd argument */ 151 adp->arg_value = (int)fd; 152 adp->arg_object = NULL; 153 adp->arg_type = AT_BYVAL; 154 adp->arg_inout = AI_INPUT; 155 adp->arg_size = 0; 156 157 error = Psyscall(Pr, &rval, SYS_close, 1, &argd[0]); 158 159 if (error) { 160 errno = (error > 0)? error : ENOSYS; 161 return (-1); 162 } 163 return (rval.sys_rval1); 164 } 165 166 /* 167 * access() system call -- executed by subject process. 168 */ 169 int 170 pr_access(struct ps_prochandle *Pr, const char *path, int amode) 171 { 172 sysret_t rval; /* return from access() */ 173 argdes_t argd[4]; /* arg descriptors for access() */ 174 argdes_t *adp; 175 int err; 176 177 if (Pr == NULL) /* no subject process */ 178 return (access(path, amode)); 179 180 adp = &argd[0]; /* directory fd argument */ 181 adp->arg_value = AT_FDCWD; 182 adp->arg_object = NULL; 183 adp->arg_type = AT_BYVAL; 184 adp->arg_inout = AI_INPUT; 185 adp->arg_size = 0; 186 187 adp++; /* path argument */ 188 adp->arg_value = 0; 189 adp->arg_object = (void *)path; 190 adp->arg_type = AT_BYREF; 191 adp->arg_inout = AI_INPUT; 192 adp->arg_size = strlen(path) + 1; 193 194 adp++; /* amode argument */ 195 adp->arg_value = (long)amode; 196 adp->arg_object = NULL; 197 adp->arg_type = AT_BYVAL; 198 adp->arg_inout = AI_INPUT; 199 adp->arg_size = 0; 200 201 adp++; /* flag argument */ 202 adp->arg_value = 0; 203 adp->arg_object = NULL; 204 adp->arg_type = AT_BYVAL; 205 adp->arg_inout = AI_INPUT; 206 adp->arg_size = 0; 207 208 err = Psyscall(Pr, &rval, SYS_faccessat, 4, &argd[0]); 209 210 if (err) { 211 errno = (err > 0) ? err : ENOSYS; 212 return (-1); 213 } 214 215 return (rval.sys_rval1); 216 } 217