1 files changed, 60 insertions, 0 deletions
diff --git a/shell/beispiele/pipe_example/pipe.c b/shell/beispiele/pipe_example/pipe.c
new file mode 100644
index 0000000..422e4d5
--- /dev/null
+++ b/shell/beispiele/pipe_example/pipe.c
@@ -0,0 +1,60 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+#define BUF_SIZE 32
+
+int pipe_fds[2];
+
+void term(const char *msg) {
+	if (msg) {
+		fprintf(stderr, "Error: %s\n", msg);
+		fflush(stderr);
+	}
+	
+	int close_fail = 0;
+	int ret = close(pipe_fds[0]);
+	
+	if (ret < 0) {
+		fprintf(stderr, "Error: Couldn't close reading end of pipe\n");
+		fflush(stderr);
+		close_fail = 1;
+	}
+	
+	ret = close(pipe_fds[1]);
+	
+	if (ret < 0) {
+		fprintf(stderr, "Error: Couldn't close writing end of pipe\n");
+		fflush(stderr);
+		close_fail = 1;
+	}
+	
+	exit((msg || close_fail) ? EXIT_FAILURE : EXIT_SUCCESS);
+}
+
+int main(void) {
+	int ret = pipe(pipe_fds);
+
+	if (ret < 0)
+		term("Couldn't create pipe");
+
+	char out_buf[] = "hello";
+	ret = write(pipe_fds[1], out_buf, strlen(out_buf) + 1);
+
+	if (ret < 0)
+		term("Couldn't write to pipe");
+
+	printf("send msg: %s\n", out_buf);
+
+	char in_buf[BUF_SIZE];
+	memset(in_buf, 0, BUF_SIZE);
+
+	ret = read(pipe_fds[0], in_buf, BUF_SIZE - 1);
+
+	if (ret < 0)
+		term("Couldn't read from pipe");
+
+	printf("recv msg: %s\n", in_buf);
+	return 0;
+}