usr/src/lib/libproc/common/pr_rename.c

   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 (c) 1998, 2010, Oracle and/or its affiliates. All rights reserved.
  24  */
  25
  26 #include <stdlib.h>
  27 #include <unistd.h>
  28 #include <string.h>
  29 #include <errno.h>
  30 #include "libproc.h"
  31
  32 /*
  33  * rename() system call -- executed by subject process.
  34  */
  35 int
  36 pr_rename(struct ps_prochandle *Pr, const char *old, const char *new)
  37 {
  38         sysret_t rval;
  39         argdes_t argd[4];
  40         argdes_t *adp;
  41         int error;
  42
  43         if (Pr == NULL)
  44                 return (rename(old, new));
  45
  46         adp = &argd[0];         /* old fd argument */
  47         adp->arg_value = AT_FDCWD;
  48         adp->arg_object = NULL;
  49         adp->arg_type = AT_BYVAL;
  50         adp->arg_inout = AI_INPUT;
  51         adp->arg_size = 0;
  52
  53         adp++;                  /* move to old argument */
  54         adp->arg_value = 0;
  55         adp->arg_object = (void *)old;
  56         adp->arg_type = AT_BYREF;
  57         adp->arg_inout = AI_INPUT;
  58         adp->arg_size = strlen(old) + 1;
  59
  60         adp++;                  /* move to new fd argument */
  61         adp->arg_value = AT_FDCWD;
  62         adp->arg_object = NULL;
  63         adp->arg_type = AT_BYVAL;
  64         adp->arg_inout = AI_INPUT;
  65         adp->arg_size = 0;
  66
  67         adp++;                  /* move to new argument */
  68         adp->arg_value = 0;
  69         adp->arg_object = (void *)new;
  70         adp->arg_type = AT_BYREF;
  71         adp->arg_inout = AI_INPUT;
  72         adp->arg_size = strlen(new) + 1;
  73
  74         error = Psyscall(Pr, &rval, SYS_renameat, 4, &argd[0]);
  75
  76         if (error) {
  77                 errno = (error > 0) ? error : ENOSYS;
  78                 return (-1);
  79         }
  80         return (rval.sys_rval1);
  81 }
  82
  83 /*
  84  * link() system call -- executed by subject process.
  85  */
  86 int
  87 pr_link(struct ps_prochandle *Pr, const char *existing, const char *new)
  88 {
  89         sysret_t rval;
  90         argdes_t argd[5];
  91         argdes_t *adp;
  92         int error;
  93
  94         if (Pr == NULL)
  95                 return (link(existing, new));
  96
  97         adp = &argd[0];         /* first directory fd argument */
  98         adp->arg_value = AT_FDCWD;
  99         adp->arg_object = NULL;
 100         adp->arg_type = AT_BYVAL;
 101         adp->arg_inout = AI_INPUT;
 102         adp->arg_size = 0;
 103
 104         adp++;                  /* existing argument */
 105         adp->arg_value = 0;
 106         adp->arg_object = (void *)existing;
 107         adp->arg_type = AT_BYREF;
 108         adp->arg_inout = AI_INPUT;
 109         adp->arg_size = strlen(existing) + 1;
 110
 111         adp++;                  /* second directory fd argument */
 112         adp->arg_value = AT_FDCWD;
 113         adp->arg_object = NULL;
 114         adp->arg_type = AT_BYVAL;
 115         adp->arg_inout = AI_INPUT;
 116         adp->arg_size = 0;
 117
 118         adp++;                  /* new argument */
 119         adp->arg_value = 0;
 120         adp->arg_object = (void *)new;
 121         adp->arg_type = AT_BYREF;
 122         adp->arg_inout = AI_INPUT;
 123         adp->arg_size = strlen(new) + 1;
 124
 125         adp++;                  /* flag argument */
 126         adp->arg_value = 0;
 127         adp->arg_object = NULL;
 128         adp->arg_type = AT_BYVAL;
 129         adp->arg_inout = AI_INPUT;
 130         adp->arg_size = 0;
 131
 132         error = Psyscall(Pr, &rval, SYS_linkat, 5, &argd[0]);
 133
 134         if (error) {
 135                 errno = (error > 0) ? error : ENOSYS;
 136                 return (-1);
 137         }
 138         return (rval.sys_rval1);
 139 }
 140
 141 /*
 142  * unlink() system call -- executed by subject process.
 143  */
 144 int
 145 pr_unlink(struct ps_prochandle *Pr, const char *path)
 146 {
 147         sysret_t rval;
 148         argdes_t argd[3];
 149         argdes_t *adp;
 150         int error;
 151
 152         if (Pr == NULL)
 153                 return (unlink(path));
 154
 155         adp = &argd[0];         /* directory fd argument */
 156         adp->arg_value = AT_FDCWD;
 157         adp->arg_object = NULL;
 158         adp->arg_type = AT_BYVAL;
 159         adp->arg_inout = AI_INPUT;
 160         adp->arg_size = 0;
 161         adp++;                  /* move to path argument */
 162
 163         adp->arg_value = 0;
 164         adp->arg_object = (void *)path;
 165         adp->arg_type = AT_BYREF;
 166         adp->arg_inout = AI_INPUT;
 167         adp->arg_size = strlen(path) + 1;
 168         adp++;                  /* move to flags argument */
 169
 170         adp->arg_value = 0;
 171         adp->arg_object = NULL;
 172         adp->arg_type = AT_BYVAL;
 173         adp->arg_inout = AI_INPUT;
 174         adp->arg_size = 0;
 175
 176         error = Psyscall(Pr, &rval, SYS_unlinkat, 3, &argd[0]);
 177
 178         if (error) {
 179                 errno = (error > 0) ? error : ENOSYS;
 180                 return (-1);
 181         }
 182         return (rval.sys_rval1);
 183 }