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Diffstat (limited to 'test/mmap/tst-mmap-eofsync.c')
-rw-r--r--test/mmap/tst-mmap-eofsync.c106
1 files changed, 106 insertions, 0 deletions
diff --git a/test/mmap/tst-mmap-eofsync.c b/test/mmap/tst-mmap-eofsync.c
new file mode 100644
index 000000000..e8ef72714
--- /dev/null
+++ b/test/mmap/tst-mmap-eofsync.c
@@ -0,0 +1,106 @@
+/* Test program for synchronization of stdio state with file after EOF. */
+
+#include <stdio.h>
+#include <error.h>
+#include <errno.h>
+
+static void do_prepare (void);
+#define PREPARE(argc, argv) do_prepare ()
+static int do_test (void);
+#define TEST_FUNCTION do_test ()
+#include <test-skeleton.c>
+
+static char *temp_file;
+static int temp_fd;
+
+static char text1[] = "Line the first\n";
+static char text2[] = "Line the second\n";
+
+static void
+do_prepare (void)
+{
+ temp_fd = create_temp_file ("tst-mmap-eofsync.", &temp_file);
+ if (temp_fd == -1)
+ error (1, errno, "cannot create temporary file");
+ else
+ {
+ ssize_t cc = write (temp_fd, text1, sizeof text1 - 1);
+ if (cc != sizeof text1 - 1)
+ error (1, errno, "cannot write to temporary file");
+ }
+}
+
+static int
+do_test (void)
+{
+ FILE *f;
+ char buf[128];
+ int result = 0;
+ int c;
+
+ f = fopen (temp_file, "rm");
+ if (f == NULL)
+ {
+ perror (temp_file);
+ return 1;
+ }
+
+ if (fgets (buf, sizeof buf, f) == NULL)
+ {
+ perror ("fgets");
+ return 1;
+ }
+
+ if (strcmp (buf, text1))
+ {
+ printf ("read \"%s\", expected \"%s\"\n", buf, text1);
+ result = 1;
+ }
+
+ printf ("feof = %d, ferror = %d immediately after fgets\n",
+ feof (f), ferror (f));
+
+#if 1
+ c = fgetc (f);
+ if (c == EOF)
+ printf ("fgetc -> EOF (feof = %d, ferror = %d)\n",
+ feof (f), ferror (f));
+ else
+ {
+ printf ("fgetc returned %o (feof = %d, ferror = %d)\n",
+ c, feof (f), ferror (f));
+ result = 1;
+ }
+#endif
+
+ c = write (temp_fd, text2, sizeof text2 - 1);
+ if (c == sizeof text2 - 1)
+ printf ("wrote more to file\n");
+ else
+ {
+ printf ("wrote %d != %zd (%m)\n", c, sizeof text2 - 1);
+ result = 1;
+ }
+
+ if (fgets (buf, sizeof buf, f) == NULL)
+ {
+ printf ("second fgets fails: feof = %d, ferror = %d (%m)\n",
+ feof (f), ferror (f));
+ clearerr (f);
+ if (fgets (buf, sizeof buf, f) == NULL)
+ {
+ printf ("retry fgets fails: feof = %d, ferror = %d (%m)\n",
+ feof (f), ferror (f));
+ result = 1;
+ }
+ }
+ if (result == 0 && strcmp (buf, text2))
+ {
+ printf ("second time read \"%s\", expected \"%s\"\n", buf, text2);
+ result = 1;
+ }
+
+ fclose (f);
+
+ return result;
+}