1 #include <sys/types.h> 2 #include <sys/stat.h> 3 #include <fcntl.h> 4 #include <unistd.h> 5 #include "tests/sys_mman.h" 6 #include <errno.h> 7 #include <stdio.h> 8 #include <string.h> 9 10 /* Test case supplied by Vasile Floroiu. */ 11 12 #define DO(cmd) printf(#cmd "; status: %s\n", strerror(errno)) 13 #define SZ 48216 + 1024 14 15 int main() 16 { 17 int fd; 18 19 fd = shm_open("/hw_mngr.c", (O_CREAT | O_EXCL | O_RDWR), 20 (S_IREAD | S_IWRITE)); 21 DO(shm_open()); 22 { 23 void *ptr; 24 ftruncate(fd, SZ); 25 DO(ftruncate(fd, SZ)); 26 27 ptr = mmap(0, SZ, (PROT_READ | PROT_WRITE), MAP_SHARED, fd, 0); 28 DO(mmap()); 29 30 munmap(ptr, SZ); 31 DO(munmap()); 32 } 33 shm_unlink("/hw_mngr.c"); 34 DO(shm_unlink()); 35 return 0; 36 } 37
