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-rw-r--r--stdio-common/test-popen.c15
1 files changed, 15 insertions, 0 deletions
diff --git a/stdio-common/test-popen.c b/stdio-common/test-popen.c
index 426da4a24c..b13a1c2542 100644
--- a/stdio-common/test-popen.c
+++ b/stdio-common/test-popen.c
@@ -82,6 +82,21 @@ main (void)
remove ("/tmp/tstpopen.tmp");
+ errno = 0;
+ output = popen ("/bin/cat", "m");
+ if (output != NULL)
+ {
+ puts ("popen called with illegal mode does not return NULL");
+ puts ("Test FAILED!");
+ exit (1);
+ }
+ if (errno != EINVAL)
+ {
+ puts ("popen called with illegal mode does not set errno to EINVAL");
+ puts ("Test FAILED!");
+ exit (1);
+ }
+
puts (wstatus | rstatus ? "Test FAILED!" : "Test succeeded.");
exit (wstatus | rstatus);
}