X-Git-Url: https://git.lttng.org/?p=lttng-tools.git;a=blobdiff_plain;f=tests%2Fregression%2Fkernel%2Fselect_poll_epoll.c;h=08e7fce0d898df547da42e371dc694f90bea4141;hp=f24e9e468ebcf97da0cdebdf12512d1c5704a5b4;hb=8b3b99e2870d53c97f9ec9a976ed91f43da5f02b;hpb=070fffdfb3f0b8f7a0af04f1481c517832e333e9

diff --git a/tests/regression/kernel/select_poll_epoll.c b/tests/regression/kernel/select_poll_epoll.c
index f24e9e468..08e7fce0d 100644
--- a/tests/regression/kernel/select_poll_epoll.c
+++ b/tests/regression/kernel/select_poll_epoll.c
@@ -17,7 +17,7 @@
 #include <limits.h>
 #include <pthread.h>
 #include <sys/mman.h>
-#include <time.h>
+#include <common/compat/time.h>
 
 #define BUF_SIZE 256
 #define NB_FD 1
@@ -437,29 +437,36 @@ void ppoll_fds_ulong_max(void)
 }
 
 /*
- * Select is limited to 1024 FDs, should output a pselect event
- * with 0 FDs.
+ * Pass an invalid file descriptor to pselect6(). The syscall should return
+ * -EBADF. The recorded event should contain a "ret = -EBADF (-9)".
  */
-void pselect_fd_too_big(void)
+void pselect_invalid_fd(void)
 {
-	long rfds[2048 / (sizeof(long) * CHAR_BIT)];
+	fd_set rfds;
 	int ret;
-	int fd2;
+	int fd;
 	char buf[BUF_SIZE];
 
 	/*
-	 * Test if nfds > 1024.
-	 * Make sure ulimit is set correctly (ulimit -n 2048).
+	 * Open a file, close it and use the closed FD in the pselect6 call.
 	 */
-	fd2 = dup2(wait_fd, 2047);
-	if (fd2 != 2047) {
-		perror("dup2");
-		return;
+
+	fd = open("/dev/null", O_RDONLY);
+	if (fd == -1) {
+		perror("open");
+		goto error;
+	}
+
+	ret = close(fd);
+	if (ret == -1) {
+		perror("close");
+		goto error;
 	}
+
 	FD_ZERO(&rfds);
-	FD_SET(fd2, (fd_set *) &rfds);
-	ret = syscall(SYS_pselect6, fd2 + 1, &rfds, NULL, NULL, NULL, NULL);
+	FD_SET(fd, &rfds);
 
+	ret = syscall(SYS_pselect6, fd + 1, &rfds, NULL, NULL, NULL, NULL);
 	if (ret == -1) {
 		perror("# pselect()");
 	} else if (ret) {
@@ -471,7 +478,8 @@ void pselect_fd_too_big(void)
 	} else {
 		printf("# [pselect] timeout\n");
 	}
-
+error:
+	return;
 }
 
 /*
@@ -812,14 +820,14 @@ void print_list(void)
 			"and epoll, waiting for input\n");
 	fprintf(stderr, "\t2: Timeout cases (1ms) for select, pselect6, poll, "
 			"ppoll and epoll\n");
-	fprintf(stderr, "\t3: pselect with a FD > 1023\n");
+	fprintf(stderr, "\t3: pselect with an invalid fd\n");
 	fprintf(stderr, "\t4: ppoll with %d FDs\n", MAX_FDS);
 	fprintf(stderr, "\t5: ppoll buffer overflow, should segfault, waits "
 			"for input\n");
-	fprintf(stderr, "\t6: pselect with invalid pointer, waits for "
+	fprintf(stderr, "\t6: pselect with an invalid pointer, waits for "
 			"input\n");
 	fprintf(stderr, "\t7: ppoll with ulong_max fds, waits for input\n");
-	fprintf(stderr, "\t8: epoll_pwait with invalid pointer, waits for "
+	fprintf(stderr, "\t8: epoll_pwait with an invalid pointer, waits for "
 			"input\n");
 	fprintf(stderr, "\t9: epoll_pwait with maxevents set to INT_MAX, "
 			"waits for input\n");
@@ -892,7 +900,7 @@ int main(int argc, const char **argv)
 		run_working_cases();
 		break;
 	case 3:
-		pselect_fd_too_big();
+		pselect_invalid_fd();
 		break;
 	case 4:
 		test_ppoll_big();