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 #ifndef SHM_EXEC 22 # define SHM_EXEC 0100000 23 #endif 24 25 int 26 main(void) 27 { 28 static const int bogus_shmid = 0xfdb97531; 29 static const void * const bogus_shmaddr = 30 (void *) (unsigned long) 0xdec0ded1dec0ded2ULL; 31 static const int bogus_shmflg = 0xffffface; 32 33 long rc; 34 35 id = shmget(IPC_PRIVATE, 1, 0600); 36 if (id < 0) 37 perror_msg_and_skip("shmget"); 38 atexit(cleanup); 39 40 rc = (long) shmat(bogus_shmid, bogus_shmaddr, bogus_shmflg); 41 printf("%s(%d, %p, SHM_RDONLY|SHM_RND|SHM_REMAP|SHM_EXEC|%#x) = %s\n", 42 SHMAT, bogus_shmid, bogus_shmaddr, bogus_shmflg & ~0xf000, 43 sprintrc(rc)); 44 45 shmat(id, NULL, SHM_REMAP); 46 printf("%s(%d, NULL, SHM_REMAP) = -1 %s (%m)\n", 47 SHMAT, id, errno2name()); 48 49 void *shmaddr = shmat(id, NULL, SHM_RDONLY); 50 if (shmaddr == (void *)(-1)) 51 perror_msg_and_skip("shmat SHM_RDONLY"); 52 printf("%s(%d, NULL, SHM_RDONLY) = %p\n", SHMAT, id, shmaddr); 53 54 rc = shmdt(NULL); 55 printf("shmdt(NULL) = %s\n", sprintrc(rc)); 56 57 rc = shmdt(shmaddr); 58 printf("shmdt(%p) = %s\n", shmaddr, sprintrc(rc)); 59 60 ++shmaddr; 61 void *shmaddr2 = shmat(id, shmaddr, SHM_RND); 62 if (shmaddr2 == (void *)(-1)) 63 printf("%s(%d, %p, SHM_RND) = -1 %s (%m)\n", 64 SHMAT, id, shmaddr, errno2name()); 65 else { 66 printf("%s(%d, %p, SHM_RND) = %p\n", 67 SHMAT, id, shmaddr, shmaddr2); 68 rc = shmdt(shmaddr2); 69 printf("shmdt(%p) = %s\n", shmaddr2, sprintrc(rc)); 70 } 71 72 shmaddr = shmat(id, NULL, SHM_RDONLY|SHM_EXEC); 73 if (shmaddr == (void *)(-1)) 74 printf("%s(%d, NULL, SHM_RDONLY|SHM_EXEC) = %s\n", 75 SHMAT, id, sprintrc(-1)); 76 else { 77 printf("%s(%d, NULL, SHM_RDONLY|SHM_EXEC) = %p\n", 78 SHMAT, id, shmaddr); 79 rc = shmdt(shmaddr); 80 printf("shmdt(%p) = %s\n", shmaddr, sprintrc(rc)); 81 } 82 83 puts("+++ exited with 0 +++"); 84 return 0; 85 } 86
