* libio/iopopen.c (_IO_new_proc_open): Don't close child_std_end

	if one of proc_file_chain streams has that fileno.
	* stdio-common/Makefile (tests): Add tst-popen2.
	* stdio-common/tst-popen2.c: New test.

1 files changed, 92 insertions, 0 deletions

diff --git a/stdio-common/tst-popen2.c b/stdio-common/tst-popen2.c
new file mode 100644
index 0000000000..0ab151c598
--- /dev/null
+++ b/stdio-common/tst-popen2.c
@@ -0,0 +1,92 @@
+#include <stdio.h>
+#include <string.h>
+#include <unistd.h>
+
+static int
+do_test (void)
+{
+  int fd = dup (fileno (stdout));
+  if (fd <= 1)
+    {
+      puts ("dup failed");
+      return 1;
+    }
+
+  FILE *f1 = fdopen (fd, "w");
+  if (f1 == NULL)
+    {
+      printf ("fdopen failed: %m\n");
+      return 1;
+    }
+
+  fclose (stdout);
+
+  FILE *f2 = popen ("echo test1", "r");
+  if (f2 == NULL)
+    {
+      fprintf (f1, "1st popen failed: %m\n");
+      return 1;
+    }
+  FILE *f3 = popen ("echo test2", "r");
+  if (f2 == NULL || f3 == NULL)
+    {
+      fprintf (f1, "2nd popen failed: %m\n");
+      return 1;
+    }
+
+  char *line = NULL;
+  size_t len = 0;
+  int result = 0;
+  if (getline (&line, &len, f2) != 6)
+    {
+      fputs ("could not read line from 1st popen\n", f1);
+      result = 1;
+    }
+  else if (strcmp (line, "test1\n") != 0)
+    {
+      fprintf (f1, "read \"%s\"\n", line);
+      result = 1;
+    }
+
+  if (getline (&line, &len, f2) != -1)
+    {
+      fputs ("second getline did not return -1\n", f1);
+      result = 1;
+    }
+
+  if (getline (&line, &len, f3) != 6)
+    {
+      fputs ("could not read line from 2nd popen\n", f1);
+      result = 1;
+    }
+  else if (strcmp (line, "test2\n") != 0)
+    {
+      fprintf (f1, "read \"%s\"\n", line);
+      result = 1;
+    }
+
+  if (getline (&line, &len, f3) != -1)
+    {
+      fputs ("second getline did not return -1\n", f1);
+      result = 1;
+    }
+
+  int ret = pclose (f2);
+  if (ret != 0)
+    {
+      fprintf (f1, "1st pclose returned %d\n", ret);
+      result = 1;
+    }
+
+  ret = pclose (f3);
+  if (ret != 0)
+    {
+      fprintf (f1, "2nd pclose returned %d\n", ret);
+      result = 1;
+    }
+
+  return result;
+}
+
+#define TEST_FUNCTION do_test ()
+#include "../test-skeleton.c"