lib: Split up huge src/guestfs.c into logical compilation units.

This file had grown by accretion to include:

 - code related to handles (now in src/handle.c)

 - safe allocation (src/alloc.c)

 - debug, errors, warnings (src/errors.c)

 - private data (src/private-data.c)

 - miscellaneous functions (src/canonical-name.c, src/utils.c)

This commit also removes about a dozen #include files which were
probably not really used.

This is just code motion.

1 files changed, 282 insertions, 0 deletions

diff --git a/src/errors.c b/src/errors.c
new file mode 100644
index 00000000..d12a4a3a
--- /dev/null
+++ b/src/errors.c
@@ -0,0 +1,282 @@
+/* libguestfs
+ * Copyright (C) 2009-2012 Red Hat Inc.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include <config.h>
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <stdarg.h>
+#include <string.h>
+#include <errno.h>
+
+#include "c-ctype.h"
+
+#include "guestfs.h"
+#include "guestfs-internal.h"
+
+const char *
+guestfs_last_error (guestfs_h *g)
+{
+  return g->last_error;
+}
+
+int
+guestfs_last_errno (guestfs_h *g)
+{
+  return g->last_errnum;
+}
+
+static void
+set_last_error (guestfs_h *g, int errnum, const char *msg)
+{
+  free (g->last_error);
+  g->last_error = strdup (msg);
+  g->last_errnum = errnum;
+}
+
+/* Warning are printed unconditionally.  We try to make these rare.
+ * Generally speaking, a warning should either be an error, or if it's
+ * not important for end users then it should be a debug message.
+ */
+void
+guestfs___warning (guestfs_h *g, const char *fs, ...)
+{
+  va_list args;
+  char *msg, *msg2;
+  int len;
+
+  va_start (args, fs);
+  len = vasprintf (&msg, fs, args);
+  va_end (args);
+
+  if (len < 0) return;
+
+  len = asprintf (&msg2, _("warning: %s"), msg);
+  free (msg);
+
+  if (len < 0) return;
+
+  guestfs___call_callbacks_message (g, GUESTFS_EVENT_LIBRARY, msg2, len);
+
+  free (msg2);
+}
+
+/* Debug messages. */
+void
+guestfs___debug (guestfs_h *g, const char *fs, ...)
+{
+  va_list args;
+  char *msg;
+  int len;
+
+  /* The cpp macro "debug" has already checked that g->verbose is true
+   * before calling this function, but we check it again just in case
+   * anyone calls this function directly.
+   */
+  if (!g->verbose)
+    return;
+
+  va_start (args, fs);
+  len = vasprintf (&msg, fs, args);
+  va_end (args);
+
+  if (len < 0) return;
+
+  guestfs___call_callbacks_message (g, GUESTFS_EVENT_LIBRARY, msg, len);
+
+  free (msg);
+}
+
+/* Call trace messages.  These are enabled by setting g->trace, and
+ * calls to this function should only happen from the generated code
+ * in src/actions.c
+ */
+void
+guestfs___trace (guestfs_h *g, const char *fs, ...)
+{
+  va_list args;
+  char *msg;
+  int len;
+
+  va_start (args, fs);
+  len = vasprintf (&msg, fs, args);
+  va_end (args);
+
+  if (len < 0) return;
+
+  guestfs___call_callbacks_message (g, GUESTFS_EVENT_TRACE, msg, len);
+
+  free (msg);
+}
+
+void
+guestfs_error_errno (guestfs_h *g, int errnum, const char *fs, ...)
+{
+  va_list args;
+  char *msg;
+
+  va_start (args, fs);
+  int err = vasprintf (&msg, fs, args);
+  va_end (args);
+
+  if (err < 0) return;
+
+  /* set_last_error first so that the callback can access the error
+   * message and errno through the handle if it wishes.
+   */
+  set_last_error (g, errnum, msg);
+  if (g->error_cb) g->error_cb (g, g->error_cb_data, msg);
+
+  free (msg);
+}
+
+void
+guestfs_perrorf (guestfs_h *g, const char *fs, ...)
+{
+  va_list args;
+  char *msg;
+  int errnum = errno;
+
+  va_start (args, fs);
+  int err = vasprintf (&msg, fs, args);
+  va_end (args);
+
+  if (err < 0) return;
+
+  char buf[256];
+  strerror_r (errnum, buf, sizeof buf);
+
+  msg = safe_realloc (g, msg, strlen (msg) + 2 + strlen (buf) + 1);
+  strcat (msg, ": ");
+  strcat (msg, buf);
+
+  /* set_last_error first so that the callback can access the error
+   * message and errno through the handle if it wishes.
+   */
+  set_last_error (g, errnum, msg);
+  if (g->error_cb) g->error_cb (g, g->error_cb_data, msg);
+
+  free (msg);
+}
+
+void
+guestfs_set_out_of_memory_handler (guestfs_h *g, guestfs_abort_cb cb)
+{
+  g->abort_cb = cb;
+}
+
+guestfs_abort_cb
+guestfs_get_out_of_memory_handler (guestfs_h *g)
+{
+  return g->abort_cb;
+}
+
+void
+guestfs_set_error_handler (guestfs_h *g,
+                           guestfs_error_handler_cb cb, void *data)
+{
+  g->error_cb = cb;
+  g->error_cb_data = data;
+}
+
+guestfs_error_handler_cb
+guestfs_get_error_handler (guestfs_h *g, void **data_rtn)
+{
+  if (data_rtn) *data_rtn = g->error_cb_data;
+  return g->error_cb;
+}
+
+void
+guestfs_push_error_handler (guestfs_h *g,
+                            guestfs_error_handler_cb cb, void *data)
+{
+  struct error_cb_stack *old_stack;
+
+  old_stack = g->error_cb_stack;
+  g->error_cb_stack = safe_malloc (g, sizeof (struct error_cb_stack));
+  g->error_cb_stack->next = old_stack;
+  g->error_cb_stack->error_cb = g->error_cb;
+  g->error_cb_stack->error_cb_data = g->error_cb_data;
+
+  guestfs_set_error_handler (g, cb, data);
+}
+
+void
+guestfs_pop_error_handler (guestfs_h *g)
+{
+  struct error_cb_stack *next_stack;
+
+  if (g->error_cb_stack) {
+    next_stack = g->error_cb_stack->next;
+    guestfs_set_error_handler (g, g->error_cb_stack->error_cb,
+                               g->error_cb_stack->error_cb_data);
+    free (g->error_cb_stack);
+    g->error_cb_stack = next_stack;
+  }
+  else
+    guestfs___init_error_handler (g);
+}
+
+static void default_error_cb (guestfs_h *g, void *data, const char *msg);
+
+void
+guestfs___init_error_handler (guestfs_h *g)
+{
+  g->error_cb = default_error_cb;
+  g->error_cb_data = NULL;
+}
+
+static void
+default_error_cb (guestfs_h *g, void *data, const char *msg)
+{
+  fprintf (stderr, _("libguestfs: error: %s\n"), msg);
+}
+
+/* When tracing, be careful how we print BufferIn parameters which
+ * usually contain large amounts of binary data (RHBZ#646822).
+ */
+void
+guestfs___print_BufferIn (FILE *out, const char *buf, size_t buf_size)
+{
+  size_t i;
+  size_t orig_size = buf_size;
+
+  if (buf_size > 256)
+    buf_size = 256;
+
+  fputc ('"', out);
+
+  for (i = 0; i < buf_size; ++i) {
+    if (c_isprint (buf[i]))
+      fputc (buf[i], out);
+    else
+      fprintf (out, "\\x%02x", (unsigned char) buf[i]);
+  }
+
+  fputc ('"', out);
+
+  if (orig_size > buf_size)
+    fprintf (out,
+             _("<truncated, original size %zu bytes>"), orig_size);
+}
+
+void
+guestfs___print_BufferOut (FILE *out, const char *buf, size_t buf_size)
+{
+  guestfs___print_BufferIn (out, buf, buf_size);
+}