1 files changed, 47 insertions, 0 deletions
diff --git a/test/misc/popen.c b/test/misc/popen.c
new file mode 100644
index 0000000..868b70e
--- /dev/null
+++ b/test/misc/popen.c
@@ -0,0 +1,47 @@
+#include <unistd.h>
+#include <stdio.h>
+#include <errno.h>
+#include <string.h>
+#include <signal.h>
+
+#define TEST(r, f, x, m) ( \
+((r) = (f)) == (x) || \
+(printf(__FILE__ ":%d: %s failed (" m ")\n", __LINE__, #f, r, x), err++, 0) )
+
+#define TEST_E(f) ( (errno = 0), (f) || \
+(printf(__FILE__ ":%d: %s failed (errno = %d)\n", __LINE__, #f, errno), err++, 0) )
+
+#define TEST_S(s, x, m) ( \
+!strcmp((s),(x)) || \
+(printf(__FILE__ ":%d: [%s] != [%s] (%s)\n", __LINE__, s, x, m), err++, 0) )
+
+static sig_atomic_t got_sig;
+
+static void handler(int sig)
+{
+	got_sig = 1;
+}
+
+int main(void)
+{
+	int i;
+	char foo[6];
+	char cmd[64];
+	int err = 0;
+	FILE *f;
+
+	TEST_E(f = popen("echo hello", "r"));
+	TEST_E(fgets(foo, sizeof foo, f));
+	TEST_S(foo, "hello", "child process did not say hello");
+	TEST(i, pclose(f), 0, "exit status %04x != %04x");
+
+	signal(SIGUSR1, handler);
+	snprintf(cmd, sizeof cmd, "read a ; test \"x$a\" = xhello && kill -USR1 %d", getpid());
+	TEST_E(f = popen(cmd, "w"));
+	TEST_E(fputs("hello", f) >= 0);
+	TEST(i, pclose(f), 0, "exit status %04x != %04x");
+	signal(SIGUSR1, SIG_DFL);
+	TEST(i, got_sig, 1, "child process did not send signal (%i!=%i)");
+
+	return err;
+}