From: Ben Gras <ben@minix3.org>
Date: Tue, 19 Jul 2005 16:03:39 +0000 (+0000)
Subject: Another test case for select - ptys (when implemented)
X-Git-Tag: v3.1.0~588
X-Git-Url: http://zhaoyanbai.com/repos/%22../static/howto.html?a=commitdiff_plain;h=398119f873c4153a8b8fbdb59cecc1691bd2b18f;p=minix.git

Another test case for select - ptys (when implemented)
---

diff --git a/test/select/Makefile b/test/select/Makefile
index 1803aac9e..4820b8703 100644
--- a/test/select/Makefile
+++ b/test/select/Makefile
@@ -5,12 +5,12 @@ CFLAGS = -Wall -D_MINIX -D_POSIX_SOURCE
 
 PROG =	speed test00 test01 test02 test03 test04_srv test04_cli test05_srv \
         test05_cli test06_srv test06_cli test07_srv test07_cli test08_srv \
-        test08_cli test09 test10 test11 test12 test13a test13b
+        test08_cli test09 test10 test11 test12 test13a test13b test14
 
 all: $(PROG)
 
 $(PROG): 
-	$(CC) $(CFLAGS) -o $@ $@.c
+	$(CC) $(CFLAGS) -o $@ $@.c -lutil
 
 clean:
 	/usr/bin/rm -f *.o $(PROG)
diff --git a/test/select/test14.c b/test/select/test14.c
new file mode 100644
index 000000000..df64bdebf
--- /dev/null
+++ b/test/select/test14.c
@@ -0,0 +1,156 @@
+/*
+ * Test name: test14.c
+ *
+ * Objetive: The purpose of this test is to make sure that select works
+ * with ptys.
+ *
+ * Adapted from test11.c (pipe test).
+ * 
+ * Ben Gras
+ */
+
+#include <time.h>
+#include <sys/types.h>
+#include <sys/wait.h>
+#include <sys/asynchio.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <sys/select.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <limits.h>
+#include <string.h>
+#include <signal.h>
+#include <libutil.h>
+
+void pipehandler(int sig)
+{
+
+}
+
+void do_child(int pty_fds[]) 
+{
+	/* reads from pipe and prints out the data */
+	char data[2048];
+	int retval;	 
+	fd_set fds_read;
+	fd_set fds_exception;	
+	struct timeval timeout;
+
+	signal(SIGPIPE, pipehandler);
+	signal(SIGUSR1, pipehandler);
+
+	/* first, close the write part, since it is not needed */
+	close(pty_fds[1]);
+	
+	while(1) {
+		FD_ZERO(&fds_read);
+		FD_ZERO(&fds_exception);
+		FD_SET(pty_fds[0], &fds_read);
+		FD_SET(pty_fds[0], &fds_exception);
+		timeout.tv_sec = 5;
+		timeout.tv_usec = 0;
+		retval = select(pty_fds[0]+1,  &fds_read, NULL, &fds_exception, &timeout);
+		if (retval == -1) {
+			perror("select");
+			fprintf(stderr, "child: Error in select\n");
+			continue;
+		} else printf("child select: %d\n", retval);
+		if (FD_ISSET(pty_fds[0], &fds_exception)) {
+			printf("child: exception fd set. quitting.\n");
+			break;
+		}
+		if (FD_ISSET(pty_fds[0], &fds_read)) {
+			printf("child: read fd set. reading.\n");
+			if ((retval = read(pty_fds[0], data, sizeof(data))) < 0) {
+				perror("read");
+				fprintf(stderr, "child: couldn't read from pipe\n");
+				exit(-1);
+			}
+			if(retval == 0) {
+				fprintf(stderr, "child: eof on pipe\n");
+				break;
+			}
+			data[retval] = '\0';
+			printf("pid %d eipe reads (%d): %s\n", getpid(), retval, data);
+		} else printf("child: no fd set\n");
+	}
+	
+	exit(0);
+}
+
+void do_parent(int pty_fds[]) 
+{
+	char data[1024];
+	int retval;
+	fd_set fds_write;
+
+	signal(SIGPIPE, pipehandler);
+	signal(SIGUSR1, pipehandler);
+
+	/* first, close the read part of pty, since it is not needed */
+	close(pty_fds[0]);
+
+	/* now enter a loop of read user input, and writing it to the pty */
+	while (1) {
+		FD_ZERO(&fds_write);
+		FD_SET(pty_fds[1], &fds_write);
+		printf("pid %d Waiting for pty ready to write...\n", getpid());
+		retval = select(pty_fds[1]+1, NULL, &fds_write, NULL, NULL);
+		if (retval == -1) {
+			perror("select");
+			fprintf(stderr, "Parent: Error in select\n");
+			exit(-1);
+		}		
+
+		printf("Input data: ");
+		if(!gets(data)) {
+			printf("parent: eof; exiting\n");
+			break;
+		}
+		if (!strcmp(data, "exit"))
+			break;
+		if (!FD_ISSET(pty_fds[1], &fds_write)) {
+			fprintf(stderr, "parent: write fd not set?! retrying\n");
+			continue;
+		}
+		retval = write(pty_fds[1], &data, 1024);
+		if (retval == -1) {
+			perror("write");
+			fprintf(stderr, "Error writing on pty\n");
+			exit(-1);
+		}
+	}
+
+	/* got exit from user */
+	close(pty_fds[1]);	/* close pty, let child know we're done */
+	wait(&retval);
+	printf("Child exited with status: %d\n", retval);
+	exit(0);
+}
+
+int main(int argc, char *argv[])
+{
+	int pipes[2];
+	int retval;
+	int pid;	
+
+	if(openpty(&pipes[0], &pipes[1], NULL, NULL, NULL) < 0) {
+		perror("openpty");
+		return 1;
+	}
+	sleep(50);
+	pid = fork();
+	if (pid == -1) {
+		fprintf(stderr, "Error forking\n");
+		exit(-1);
+	}
+
+	if (pid == 0) /* child proc */
+		do_child(pipes);
+	else
+		do_parent(pipes);
+
+	/* not reached */
+	return 0;
+}