test/ipc/shmt/shmt08.c

   1 /*
   2  *
   3  *   Copyright (c) International Business Machines  Corp., 2002
   4  *
   5  *   This program is free software;  you can redistribute it and/or modify
   6  *   it under the terms of the GNU General Public License as published by
   7  *   the Free Software Foundation; either version 2 of the License, or
   8  *   (at your option) any later version.
   9  *
  10  *   This program is distributed in the hope that it will be useful,
  11  *   but WITHOUT ANY WARRANTY;  without even the implied warranty of
  12  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
  13  *   the GNU General Public License for more details.
  14  *
  15  *   You should have received a copy of the GNU General Public License
  16  *   along with this program;  if not, write to the Free Software
  17  *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  18  */
  19
  20 /* 12/20/2002   Port to LTP     robbiew@us.ibm.com */
  21 /* 06/30/2001   Port to Linux   nsharoff@us.ibm.com */
  22
  23 /*
  24  * NAME
  25  *      shmt08
  26  *
  27  * CALLS
  28  *      shmctl(2) shmget(2) shmat(2) shmdt(2)
  29  *
  30  * ALGORITHM
  31  * Create a shared memory segment. Attach it twice at an address
  32  * that is provided by the system.  Detach the previously attached
  33  * segments from the process.
  34  *
  35  */
  36
  37
  38 #include <stdio.h>
  39 #include <sys/types.h>
  40 #include <sys/ipc.h>
  41 #include <sys/shm.h>
  42 #include <errno.h>
  43
  44 #define K_1  1024
  45
  46 /** LTP Port **/
  47 #include "test.h"
  48 #include "usctest.h"
  49
  50 char *TCID="shmt08";            /* Test program identifier.    */
  51 int TST_TOTAL=2;                /* Total number of test cases. */
  52 extern int Tst_count;           /* Test Case counter for tst_* routines */
  53 /**************/
  54
  55 key_t   key;
  56
  57 int rm_shm(int);
  58
  59 int main(void)
  60 {
  61         char    *cp=NULL, *cp1=NULL;
  62         int     shmid;
  63
  64         key = (key_t) getpid() ;
  65         errno = 0 ;
  66 /*-------------------------------------------------------*/
  67
  68
  69         if ((shmid = shmget(key, 24*K_1, IPC_CREAT|0666)) < 0) {
  70                 perror("shmget");
  71                 tst_resm(TFAIL,"Error: shmget: shmid = %d, errno = %d\n",
  72                 shmid, errno) ;
  73                 tst_exit() ;
  74         }
  75
  76         cp = (char *) shmat(shmid, (void *)0, 0);
  77         if (cp == (char *)-1) {
  78                 tst_resm(TFAIL,"shmat1 Failed");
  79                 rm_shm(shmid) ;
  80                 tst_exit() ;
  81         }
  82
  83         cp1 = (char *) shmat(shmid, (void *)0, 0);
  84         if (cp1 == (char *)-1) {
  85                 perror("shmat2");
  86                 rm_shm(shmid) ;
  87                 tst_exit() ;
  88         }
  89
  90         tst_resm(TPASS,"shmget,shmat");
  91
  92 /*--------------------------------------------------------*/
  93
  94
  95         if (shmdt(cp) < 0) {
  96                 perror("shmdt2");
  97                 tst_resm(TFAIL,"shmdt:cp") ;
  98         }
  99
 100         if (shmdt(cp1) < 0 ) {
 101                 perror("shmdt1");
 102                 tst_resm(TFAIL,"shmdt:cp1") ;
 103         }
 104
 105         tst_resm(TPASS,"shmdt");
 106
 107 /*---------------------------------------------------------*/
 108         rm_shm(shmid) ;
 109         tst_exit() ;
 110
 111 /*---------------------------------------------------------*/
 112         return(0);
 113 }
 114
 115 int rm_shm(shmid)
 116 int shmid ;
 117 {
 118         if (shmctl(shmid, IPC_RMID, NULL) == -1) {
 119                 perror("shmctl");
 120                 tst_resm(TFAIL,
 121                 "shmctl Failed to remove: shmid = %d, errno = %d\n",
 122                 shmid, errno) ;
 123                 tst_exit();
 124         }
 125         return(0);
 126 }
 127