1 #include "tests.h" 2 #include <stdio.h> 3 #include <stdlib.h> 4 #include <sys/shm.h> 5 6 static int id = -1; 7 8 static void 9 cleanup(void) 10 { 11 shmctl(id, IPC_RMID, NULL); 12 id = -1; 13 } 14 15 #ifdef __alpha__ 16 # define SHMAT "osf_shmat" 17 #else 18 # define SHMAT "shmat" 19 #endif 20 21 int 22 main(void) 23 { 24 static const int bogus_shmid = 0xfdb97531; 25 static const void * const bogus_shmaddr = 26 (void *) (unsigned long) 0xdec0ded1dec0ded2ULL; 27 static const int bogus_shmflg = 0xffffface; 28 29 long rc; 30 31 id = shmget(IPC_PRIVATE, 1, 0600); 32 if (id < 0) 33 perror_msg_and_skip("shmget"); 34 atexit(cleanup); 35 36 rc = (long) shmat(bogus_shmid, bogus_shmaddr, bogus_shmflg); 37 printf("%s(%d, %p, SHM_REMAP|SHM_RDONLY|SHM_RND|%#x) = %s\n", 38 SHMAT, bogus_shmid, bogus_shmaddr, bogus_shmflg & ~0x7000, 39 sprintrc(rc)); 40 41 shmat(id, NULL, SHM_REMAP); 42 printf("%s(%d, NULL, SHM_REMAP) = -1 %s (%m)\n", 43 SHMAT, id, errno2name()); 44 45 void *shmaddr = shmat(id, NULL, SHM_RDONLY); 46 if (shmaddr == (void *)(-1)) 47 perror_msg_and_skip("shmat SHM_RDONLY"); 48 printf("%s(%d, NULL, SHM_RDONLY) = %p\n", SHMAT, id, shmaddr); 49 50 rc = shmdt(NULL); 51 printf("shmdt(NULL) = %s\n", sprintrc(rc)); 52 53 if (shmdt(shmaddr)) 54 perror_msg_and_skip("shmdt"); 55 printf("shmdt(%p) = 0\n", shmaddr); 56 57 ++shmaddr; 58 void *shmaddr2 = shmat(id, shmaddr, SHM_RND); 59 if (shmaddr2 == (void *)(-1)) 60 printf("%s(%d, %p, SHM_RND) = -1 %s (%m)\n", 61 SHMAT, id, shmaddr, errno2name()); 62 else 63 printf("%s(%d, %p, SHM_RND) = %p\n", 64 SHMAT, id, shmaddr, shmaddr2); 65 66 puts("+++ exited with 0 +++"); 67 return 0; 68 } 69
