about summary refs log tree commit diff
path: root/stdio-common
diff options
context:
space:
mode:
Diffstat (limited to 'stdio-common')
-rw-r--r--stdio-common/Makefile2
-rw-r--r--stdio-common/tst-ferror.c41
-rw-r--r--stdio-common/tst-ferror.input1
3 files changed, 43 insertions, 1 deletions
diff --git a/stdio-common/Makefile b/stdio-common/Makefile
index b09a3a2eeb..e85cc1db23 100644
--- a/stdio-common/Makefile
+++ b/stdio-common/Makefile
@@ -39,7 +39,7 @@ aux	:= errlist siglist
 distribute := _itoa.h printf-parse.h
 
 tests := tst-printf tstscanf test_rdwr test-popen tstgetln test-fseek \
-	 temptest tst-fileno test-fwrite tst-ungetc \
+	 temptest tst-fileno test-fwrite tst-ungetc tst-ferror \
 	 xbug errnobug \
 	 bug1 bug2 bug3 bug4 bug5 bug6 bug7 bug8 bug9 bug10 bug11 \
 	 tfformat tiformat tstdiomisc \
diff --git a/stdio-common/tst-ferror.c b/stdio-common/tst-ferror.c
new file mode 100644
index 0000000000..5f23002c7a
--- /dev/null
+++ b/stdio-common/tst-ferror.c
@@ -0,0 +1,41 @@
+#include <stdio.h>
+
+int
+main (int argc, char *argv[])
+{
+  char buf[100];
+  int result = 0;
+
+  if (ferror (stdin) != 0)
+    {
+      fputs ("error bit set for stdin at startup\n", stdout);
+      result = 1;
+    }
+  if (fgets (buf, sizeof buf, stdin) != buf)
+    {
+      fputs ("fgets with existing input has problem\n", stdout);
+      result = 1;
+    }
+  if (ferror (stdin) != 0)
+    {
+      fputs ("error bit set for stdin after setup\n", stdout);
+      result = 1;
+    }
+  if (fputc ('a', stdin) != EOF)
+    {
+      fputs ("fputc to stdin does not terminate with an error\n", stdout);
+      result = 1;
+    }
+  if (ferror (stdin) == 0)
+    {
+      fputs ("error bit not set for stdin after fputc\n", stdout);
+      result = 1;
+    }
+  clearerr (stdin);
+  if (ferror (stdin) != 0)
+    {
+      fputs ("error bit set for stdin after clearerr\n", stdout);
+      result = 1;
+    }
+  return result;
+}
diff --git a/stdio-common/tst-ferror.input b/stdio-common/tst-ferror.input
new file mode 100644
index 0000000000..484ba93ef5
--- /dev/null
+++ b/stdio-common/tst-ferror.input
@@ -0,0 +1 @@
+This is a test.