s3-libsmb/clidfs.c: remove cli_nt_error()
[Samba/gebeck_regimport.git] / tests / shared_mmap.c
blob40d462302ef3d055ec82251bd36c1227e9bd795e
1 /* this tests whether we can use a shared writeable mmap on a file -
2 as needed for the mmap variant of FAST_SHARE_MODES */
4 #if defined(HAVE_UNISTD_H)
5 #include <unistd.h>
6 #endif
7 #include <sys/mman.h>
8 #include <sys/types.h>
9 #include <sys/stat.h>
10 #include <fcntl.h>
12 #define DATA "conftest.mmap"
14 #ifndef MAP_FILE
15 #define MAP_FILE 0
16 #endif
18 main()
20 int *buf;
21 int i;
22 int fd = open(DATA,O_RDWR|O_CREAT|O_TRUNC,0666);
23 int count=7;
25 if (fd == -1) exit(1);
27 for (i=0;i<10000;i++) {
28 write(fd,&i,sizeof(i));
31 close(fd);
33 if (fork() == 0) {
34 fd = open(DATA,O_RDWR);
35 if (fd == -1) exit(1);
37 buf = (int *)mmap(NULL, 10000*sizeof(int),
38 (PROT_READ | PROT_WRITE),
39 MAP_FILE | MAP_SHARED,
40 fd, 0);
42 if (buf == (int *)-1) exit(1);
44 while (count-- && buf[9124] != 55732) sleep(1);
46 if (count <= 0) exit(1);
48 buf[1763] = 7268;
49 exit(0);
52 fd = open(DATA,O_RDWR);
53 if (fd == -1) exit(1);
55 buf = (int *)mmap(NULL, 10000*sizeof(int),
56 (PROT_READ | PROT_WRITE),
57 MAP_FILE | MAP_SHARED,
58 fd, 0);
60 if (buf == (int *)-1) exit(1);
62 buf[9124] = 55732;
64 while (count-- && buf[1763] != 7268) sleep(1);
66 unlink(DATA);
68 if (count > 0) exit(0);
69 exit(1);