diff options
Diffstat (limited to 'winsup/testsuite/winsup.api/mmaptest03.c')
-rw-r--r-- | winsup/testsuite/winsup.api/mmaptest03.c | 127 |
1 files changed, 0 insertions, 127 deletions
diff --git a/winsup/testsuite/winsup.api/mmaptest03.c b/winsup/testsuite/winsup.api/mmaptest03.c deleted file mode 100644 index 544e3e43c..000000000 --- a/winsup/testsuite/winsup.api/mmaptest03.c +++ /dev/null @@ -1,127 +0,0 @@ -#include <stdio.h> -#include <stdlib.h> -#include <signal.h> -#include <setjmp.h> -#include <unistd.h> -#include <fcntl.h> -#include <sys/stat.h> -#include <sys/mman.h> -#include <sys/wait.h> -#include <errno.h> - -/* - Checks if mapping of already closed file survives fork() - - Checks if mapping the same region of the same file twice - is done correctly. -*/ - -sigset_t unblock_sigsegv; -jmp_buf r; - -/* filler for file */ -char const line[] = "y1 y1 y1 y1 y1 y1 y1 y1 y1 y1 y1 y1 y1 y1 y1 y1 y1"; - -void -perror_exit (char *str) -{ - printf ("%s: %s\n", str, strerror (errno)); - exit (1); -} - -void -sigsegv (int unused) -{ - sigprocmask (SIG_UNBLOCK, &unblock_sigsegv, 0); - longjmp (r, 1); -} - -int -main(int argc, char **argv) -{ - int i, fd, status; - struct stat statbuf; - char c, *buf1, *buf2; - pid_t pid; - - /* Create data file */ - if ((fd = open("y.txt", O_RDWR | O_CREAT | O_TRUNC, 0644)) == -1) - perror_exit ("Can't create data file"); - write (fd, line, sizeof(line) - 1); - close (fd); - - /* Open data file */ - if ((fd = open("y.txt", O_RDONLY)) == -1) - perror_exit ("Can't open data file"); - - if (fstat(fd, &statbuf) < 0) - perror_exit ("fstat failed"); - - if (!statbuf.st_size) - perror_exit ("filesize is 0"); - - if ((buf1 = mmap(NULL, statbuf.st_size, PROT_READ, MAP_SHARED, fd, 0)) - == MAP_FAILED) - perror_exit ("mmap 1 failed"); - - close(fd); - - /* Open data file a second time */ - if ((fd = open("y.txt", O_RDONLY)) == -1) - perror_exit ("Can't open data file in second run"); - - if ((buf2 = mmap(NULL, statbuf.st_size, PROT_READ, MAP_SHARED, fd, 0)) - == MAP_FAILED) - perror_exit ("mmap 2 failed"); - - close(fd); - - sigemptyset (&unblock_sigsegv); - sigaddset (&unblock_sigsegv, SIGSEGV); - signal (SIGSEGV, sigsegv); - - if (setjmp (r)) - perror_exit ("SEGV in fork"); - - pid = fork(); - - if (pid == -1) - perror_exit ("fork failed"); - - if (setjmp (r)) - perror_exit (pid ? "SEGV in parent" : "SEGV in child"); - - c = buf1[0]; - c = buf2[0]; - - if (setjmp (r)) - perror_exit (pid ? "SEGV in parent's munmap" : "SEGV in child's munmap"); - - if (munmap(buf1, statbuf.st_size)) - perror_exit (pid ? "munmap failed in parent" : "munmap failed in child"); - - if (setjmp (r) == 0) - { - c = buf1[0]; - perror_exit (pid ? "no SEGV in parent after munmap" : "no SEGV in child after munmap"); - } - - if (setjmp (r)) - perror_exit (pid ? "SEGV in parent after munmap" : "SEGV in child after munmap"); - - c = buf2[0]; - - if (setjmp (r)) - perror_exit (pid ? "SEGV in parent's munmap" : "SEGV in child's munmap"); - - if (munmap(buf2, statbuf.st_size)) - perror_exit (pid ? "munmap failed in parent" : "munmap failed in child"); - - if (pid) - { - waitpid (pid, &status, 0); - unlink ("y.txt"); - if (!WIFEXITED (status) || WEXITSTATUS (status)) - return 1; - } - - return 0; -} |