libc: add posix_fallocate()

Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>

1 files changed, 127 insertions, 0 deletions

diff --git a/test/unistd/tst-posix_fallocate.c b/test/unistd/tst-posix_fallocate.c
new file mode 100644
index 000000000..d41c604e8
--- /dev/null
+++ b/test/unistd/tst-posix_fallocate.c
@@ -0,0 +1,127 @@
+#include <fcntl.h>
+#include <sys/stat.h>
+
+#ifndef TST_POSIX_FALLOCATE64
+# define stat64 stat
+# define fstat64 fstat
+# else
+# ifndef O_LARGEFILE
+#  error no O_LARGEFILE but you want to test with LFS enabled
+# endif
+#endif
+
+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 int fd;
+static void
+do_prepare (void)
+{
+  fd = create_temp_file ("tst-posix_fallocate.", NULL);
+  if (fd == -1)
+    {
+      printf ("cannot create temporary file: %m\n");
+      exit (1);
+    }
+}
+
+
+static int
+do_test (void)
+{
+  struct stat64 st;
+
+  if (fstat64 (fd, &st) != 0)
+    {
+      puts ("1st fstat failed");
+      return 1;
+    }
+
+  if (st.st_size != 0)
+    {
+      puts ("file not created with size 0");
+      return 1;
+    }
+
+  if (posix_fallocate (fd, 512, 768) != 0)
+    {
+      puts ("1st posix_fallocate call failed");
+      return 1;
+    }
+
+  if (fstat64 (fd, &st) != 0)
+    {
+      puts ("2nd fstat failed");
+      return 1;
+    }
+
+  if (st.st_size != 512 + 768)
+    {
+      printf ("file size after 1st posix_fallocate call is %llu, expected %u\n",
+	      (unsigned long long int) st.st_size, 512u + 768u);
+      return 1;
+    }
+
+  if (posix_fallocate (fd, 0, 1024) != 0)
+    {
+      puts ("2nd posix_fallocate call failed");
+      return 1;
+    }
+
+  if (fstat64 (fd, &st) != 0)
+    {
+      puts ("3rd fstat failed");
+      return 1;
+    }
+
+  if (st.st_size != 512 + 768)
+    {
+      puts ("file size changed in 2nd posix_fallocate");
+      return 1;
+    }
+
+  if (posix_fallocate (fd, 2048, 64) != 0)
+    {
+      puts ("3rd posix_fallocate call failed");
+      return 1;
+    }
+
+  if (fstat64 (fd, &st) != 0)
+    {
+      puts ("4th fstat failed");
+      return 1;
+    }
+
+  if (st.st_size != 2048 + 64)
+    {
+      printf ("file size after 3rd posix_fallocate call is %llu, expected %u\n",
+	      (unsigned long long int) st.st_size, 2048u + 64u);
+      return 1;
+    }
+#ifdef TST_POSIX_FALLOCATE64
+  if (posix_fallocate64 (fd, 4097ULL, 4294967295ULL + 2ULL) != 0)
+    {
+      puts ("4th posix_fallocate call failed");
+      return 1;
+    }
+
+  if (fstat64 (fd, &st) != 0)
+    {
+      puts ("5th fstat failed");
+      return 1;
+    }
+
+  if (st.st_size != 4097ULL + 4294967295ULL + 2ULL)
+    {
+      printf ("file size after 4th posix_fallocate call is %llu, expected %llu\n",
+	      (unsigned long long int) st.st_size, 4097ULL + 4294967295ULL + 2ULL);
+      return 1;
+    }
+#endif
+  close (fd);
+
+  return 0;
+}