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-rw-r--r--stdio/bug7.c53
1 files changed, 53 insertions, 0 deletions
diff --git a/stdio/bug7.c b/stdio/bug7.c
new file mode 100644
index 0000000000..af06f8d6a5
--- /dev/null
+++ b/stdio/bug7.c
@@ -0,0 +1,53 @@
+/* Regression test for fseek and freopen bugs. */
+
+#include <stdio.h>
+
+int
+main ()
+{
+ int lose = 0;
+ char filename[] = "/tmp/foo";
+ FILE *fp;
+
+ fp = fopen (filename, "w+");
+ fprintf (fp, "Hello world!\n");
+ fflush (fp);
+ fseek (fp, 5L, SEEK_SET);
+ if (fseek (fp, -1L, SEEK_CUR) < 0)
+ {
+ printf ("seek failed\n");
+ lose = 1;
+ }
+ fclose (fp);
+ remove (filename);
+
+ {
+ FILE *file1;
+ FILE *file2;
+ char filename1[] = "/tmp/foo";
+ char filename2[] = "/tmp/bar";
+ int ch;
+
+ file1 = fopen (filename1, "w");
+ fclose (file1);
+
+ file2 = fopen (filename2, "w");
+ fputc ('x', file2);
+ fclose (file2);
+
+ file1 = fopen (filename1, "r");
+ file2 = freopen (filename2, "r", file1);
+ if ((ch = fgetc (file2)) != 'x')
+ {
+ printf ("wrong character in reopened file, value = %d\n", ch);
+ lose = 1;
+ }
+ fclose (file1);
+ fclose (file2);
+ remove (filename1);
+ remove (filename2);
+ }
+
+ puts (lose ? "Test FAILED!" : "Test succeeded.");
+ return lose;
+}