In this test case, it uses a variable to share data between child and parent processes. But after fork there is a copy of the variable in child process and modify it will not affect the variable in the parent process. Then when the child process call mq_open() before parent process, the case will fail.
Use tmp file to replace the variable. Any modification in child process can be seen in parent process. Signed-off-by: Kang Kai <[email protected]> --- .../conformance/interfaces/mq_open/16-1.c | 38 +++++++++++++++++-- 1 files changed, 34 insertions(+), 4 deletions(-) diff --git a/testcases/open_posix_testsuite/conformance/interfaces/mq_open/16-1.c b/testcases/open_posix_testsuite/conformance/interfaces/mq_open/16-1.c index b9a3215..c7760bc 100644 --- a/testcases/open_posix_testsuite/conformance/interfaces/mq_open/16-1.c +++ b/testcases/open_posix_testsuite/conformance/interfaces/mq_open/16-1.c @@ -20,9 +20,11 @@ * this is fine (will have some false positives, but no false negatives). */ +#include <sys/mman.h> #include <sys/stat.h> #include <sys/types.h> #include <sys/wait.h> +#include <errno.h> #include <fcntl.h> #include <mqueue.h> #include <signal.h> @@ -32,11 +34,15 @@ #include "posixtest.h" #define NAMESIZE 50 +#define TNAME "mq_open/16-1.c" int main() { char qname[NAMESIZE]; + char fname[NAMESIZE]; int pid, succeeded=0; + int fd; + void *pa = NULL; mqd_t childqueue, queue; /* @@ -47,6 +53,26 @@ int main() sprintf(qname, "/mq_open_16-1_%d", getpid()); + sprintf(fname, "/tmp/pts_mq_open_16_1_%d", getpid()); + unlink(fname); + fd = open(fname, O_CREAT | O_RDWR | O_EXCL, + S_IRUSR | S_IWUSR); + if (fd == -1) { + printf(TNAME " Error at open(): %s\n", strerror(errno)); + exit(PTS_UNRESOLVED); + } + /* file is empty now, will cause "Bus error" */ + write(fd, "0", 1); + unlink(fname); + + pa = mmap(NULL, sizeof(int), PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0); + if (pa == MAP_FAILED) { + printf(TNAME " Error at mmap: %s\n", strerror(errno)); + close(fd); + exit(PTS_FAIL); + } + *(int *)pa = 0; + if ((pid = fork()) == 0) { sigset_t mask; int sig; @@ -62,7 +88,7 @@ int main() childqueue = mq_open(qname, O_CREAT|O_EXCL|O_RDWR, S_IRUSR | S_IWUSR, NULL); if (childqueue != (mqd_t)-1) { - succeeded++; + ++*(int *)pa; #ifdef DEBUG printf("mq_open() in child succeeded\n"); } else { @@ -79,7 +105,7 @@ int main() queue = mq_open(qname, O_CREAT | O_EXCL |O_RDWR, S_IRUSR | S_IWUSR, NULL); if (queue != (mqd_t)-1) { - succeeded++; + ++*(int *)pa; #ifdef DEBUG printf("mq_open() in parent succeeded\n"); } else { @@ -93,13 +119,15 @@ int main() mq_close(queue); mq_close(childqueue); mq_unlink(qname); + close(fd); + munmap(pa, sizeof(int)); return PTS_UNRESOLVED; } mq_close(queue); mq_close(childqueue); mq_unlink(qname); - + succeeded = *(int *)pa; if (succeeded==0) { printf("Test FAILED - mq_open() never succeeded\n"); return PTS_FAIL; @@ -111,8 +139,10 @@ int main() } printf("Test PASSED\n"); + close(fd); + munmap(pa, sizeof(int)); return PTS_PASS; } return PTS_UNRESOLVED; -} \ No newline at end of file +} -- 1.7.5.4 ------------------------------------------------------------------------------ Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ _______________________________________________ Ltp-list mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/ltp-list
