usr/src/cmd/bnu/strsave.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, 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 /*      Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */
  23 /*        All Rights Reserved   */
  24
  25
  26 #ident  "%Z%%M% %I%     %E% SMI"        /* from SVR4 bnu:strsave.c 1.5 */
  27
  28 #include "uucp.h"
  29
  30 /* #include <errno.h> */
  31 /* #include <malloc.h> */
  32 /* #include <string.h> */
  33 /* #include <sys/types.h> */
  34 /* #include <sys/stat.h> */
  35
  36 /* copy str into data space -- caller should report errors. */
  37
  38 GLOBAL char *
  39 strsave(str)
  40 register char *str;
  41 {
  42         register char *rval;
  43
  44         rval = (char *)malloc(strlen(str) + 1);
  45         if (rval != 0)
  46                 strcpy(rval, str);
  47         return(rval);
  48 }
  49
  50 /*      Determine if the effective user id has the appropriate permission
  51         on a file.  Modeled after access(2).
  52         amode:
  53                 00      just checks for file existence.
  54                 04      checks read permission.
  55                 02      checks write permission.
  56                 01      checks execute/search permission.
  57                 other bits are ignored quietly.
  58 */
  59
  60 GLOBAL int
  61 eaccess( path, amode )
  62 char            *path;
  63 register mode_t amode;
  64 {
  65         struct stat     s;
  66         uid_t euid;
  67
  68         if( stat( path, &s ) == -1 )
  69                 return(-1);             /* can't stat file */
  70         amode &= 07;
  71
  72         if( (euid = geteuid()) == 0 )
  73             return(0);                  /* root can do all */
  74         if( euid == s.st_uid )
  75             s.st_mode >>= 6;            /* use owner bits */
  76         else if( getegid() == s.st_gid )
  77             s.st_mode >>= 3;            /* use group bits */
  78
  79         if( (amode & s.st_mode) == amode )
  80                 return(0);              /* access permitted */
  81         errno = EACCES;
  82         return(-1);
  83 }